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Added 5.4.7 sources, tests, and extracted

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Walter Schell 2024-09-11 08:59:38 -04:00
parent 88246d621a
commit acb51eaa34
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lua-5.4.7-tests/all.lua Normal file
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#!../lua
-- $Id: testes/all.lua $
-- See Copyright Notice at the end of this file
local version = "Lua 5.4"
if _VERSION ~= version then
io.stderr:write("This test suite is for ", version,
", not for ", _VERSION, "\nExiting tests")
return
end
_G.ARG = arg -- save arg for other tests
-- next variables control the execution of some tests
-- true means no test (so an undefined variable does not skip a test)
-- defaults are for Linux; test everything.
-- Make true to avoid long or memory consuming tests
_soft = rawget(_G, "_soft") or false
-- Make true to avoid non-portable tests
_port = rawget(_G, "_port") or false
-- Make true to avoid messages about tests not performed
_nomsg = rawget(_G, "_nomsg") or false
local usertests = rawget(_G, "_U")
if usertests then
-- tests for sissies ;) Avoid problems
_soft = true
_port = true
_nomsg = true
end
-- tests should require debug when needed
debug = nil
if usertests then
T = nil -- no "internal" tests for user tests
else
T = rawget(_G, "T") -- avoid problems with 'strict' module
end
--[=[
example of a long [comment],
[[spanning several [lines]]]
]=]
print("\n\tStarting Tests")
do
-- set random seed
local random_x, random_y = math.randomseed()
print(string.format("random seeds: %d, %d", random_x, random_y))
end
print("current path:\n****" .. package.path .. "****\n")
local initclock = os.clock()
local lastclock = initclock
local walltime = os.time()
local collectgarbage = collectgarbage
do -- (
-- track messages for tests not performed
local msgs = {}
function Message (m)
if not _nomsg then
print(m)
msgs[#msgs+1] = string.sub(m, 3, -3)
end
end
assert(os.setlocale"C")
local T,print,format,write,assert,type,unpack,floor =
T,print,string.format,io.write,assert,type,table.unpack,math.floor
-- use K for 1000 and M for 1000000 (not 2^10 -- 2^20)
local function F (m)
local function round (m)
m = m + 0.04999
return format("%.1f", m) -- keep one decimal digit
end
if m < 1000 then return m
else
m = m / 1000
if m < 1000 then return round(m).."K"
else
return round(m/1000).."M"
end
end
end
local Cstacklevel
local showmem
if not T then
local max = 0
showmem = function ()
local m = collectgarbage("count") * 1024
max = (m > max) and m or max
print(format(" ---- total memory: %s, max memory: %s ----\n",
F(m), F(max)))
end
Cstacklevel = function () return 0 end -- no info about stack level
else
showmem = function ()
T.checkmemory()
local total, numblocks, maxmem = T.totalmem()
local count = collectgarbage("count")
print(format(
"\n ---- total memory: %s (%.0fK), max use: %s, blocks: %d\n",
F(total), count, F(maxmem), numblocks))
print(format("\t(strings: %d, tables: %d, functions: %d, "..
"\n\tudata: %d, threads: %d)",
T.totalmem"string", T.totalmem"table", T.totalmem"function",
T.totalmem"userdata", T.totalmem"thread"))
end
Cstacklevel = function ()
local _, _, ncalls = T.stacklevel()
return ncalls -- number of C calls
end
end
local Cstack = Cstacklevel()
--
-- redefine dofile to run files through dump/undump
--
local function report (n) print("\n***** FILE '"..n.."'*****") end
local olddofile = dofile
local dofile = function (n, strip)
showmem()
local c = os.clock()
print(string.format("time: %g (+%g)", c - initclock, c - lastclock))
lastclock = c
report(n)
local f = assert(loadfile(n))
local b = string.dump(f, strip)
f = assert(load(b))
return f()
end
dofile('main.lua')
-- trace GC cycles
require"tracegc".start()
report"gc.lua"
local f = assert(loadfile('gc.lua'))
f()
dofile('db.lua')
assert(dofile('calls.lua') == deep and deep)
_G.deep = nil
olddofile('strings.lua')
olddofile('literals.lua')
dofile('tpack.lua')
assert(dofile('attrib.lua') == 27)
dofile('gengc.lua')
assert(dofile('locals.lua') == 5)
dofile('constructs.lua')
dofile('code.lua', true)
if not _G._soft then
report('big.lua')
local f = coroutine.wrap(assert(loadfile('big.lua')))
assert(f() == 'b')
assert(f() == 'a')
end
dofile('cstack.lua')
dofile('nextvar.lua')
dofile('pm.lua')
dofile('utf8.lua')
dofile('api.lua')
assert(dofile('events.lua') == 12)
dofile('vararg.lua')
dofile('closure.lua')
dofile('coroutine.lua')
dofile('goto.lua', true)
dofile('errors.lua')
dofile('math.lua')
dofile('sort.lua', true)
dofile('bitwise.lua')
assert(dofile('verybig.lua', true) == 10); collectgarbage()
dofile('files.lua')
if #msgs > 0 then
local m = table.concat(msgs, "\n ")
warn("#tests not performed:\n ", m, "\n")
end
print("(there should be two warnings now)")
warn("@on")
warn("#This is ", "an expected", " warning")
warn("@off")
warn("******** THIS WARNING SHOULD NOT APPEAR **********")
warn("******** THIS WARNING ALSO SHOULD NOT APPEAR **********")
warn("@on")
warn("#This is", " another one")
-- no test module should define 'debug'
assert(debug == nil)
local debug = require "debug"
print(string.format("%d-bit integers, %d-bit floats",
string.packsize("j") * 8, string.packsize("n") * 8))
debug.sethook(function (a) assert(type(a) == 'string') end, "cr")
-- to survive outside block
_G.showmem = showmem
assert(Cstack == Cstacklevel(),
"should be at the same C-stack level it was when started the tests")
end --)
local _G, showmem, print, format, clock, time, difftime,
assert, open, warn =
_G, showmem, print, string.format, os.clock, os.time, os.difftime,
assert, io.open, warn
-- file with time of last performed test
local fname = T and "time-debug.txt" or "time.txt"
local lasttime
if not usertests then
-- open file with time of last performed test
local f = io.open(fname)
if f then
lasttime = assert(tonumber(f:read'a'))
f:close();
else -- no such file; assume it is recording time for first time
lasttime = nil
end
end
-- erase (almost) all globals
print('cleaning all!!!!')
for n in pairs(_G) do
if not ({___Glob = 1, tostring = 1})[n] then
_G[n] = undef
end
end
collectgarbage()
collectgarbage()
collectgarbage()
collectgarbage()
collectgarbage()
collectgarbage();showmem()
local clocktime = clock() - initclock
walltime = difftime(time(), walltime)
print(format("\n\ntotal time: %.2fs (wall time: %gs)\n", clocktime, walltime))
if not usertests then
lasttime = lasttime or clocktime -- if no last time, ignore difference
-- check whether current test time differs more than 5% from last time
local diff = (clocktime - lasttime) / lasttime
local tolerance = 0.05 -- 5%
if (diff >= tolerance or diff <= -tolerance) then
warn(format("#time difference from previous test: %+.1f%%",
diff * 100))
end
assert(open(fname, "w")):write(clocktime):close()
end
print("final OK !!!")
--[[
*****************************************************************************
* Copyright (C) 1994-2016 Lua.org, PUC-Rio.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************
]]

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-- $Id: testes/attrib.lua $
-- See Copyright Notice in file all.lua
print "testing require"
assert(require"string" == string)
assert(require"math" == math)
assert(require"table" == table)
assert(require"io" == io)
assert(require"os" == os)
assert(require"coroutine" == coroutine)
assert(type(package.path) == "string")
assert(type(package.cpath) == "string")
assert(type(package.loaded) == "table")
assert(type(package.preload) == "table")
assert(type(package.config) == "string")
print("package config: "..string.gsub(package.config, "\n", "|"))
do
-- create a path with 'max' templates,
-- each with 1-10 repetitions of '?'
local max = _soft and 100 or 2000
local t = {}
for i = 1,max do t[i] = string.rep("?", i%10 + 1) end
t[#t + 1] = ";" -- empty template
local path = table.concat(t, ";")
-- use that path in a search
local s, err = package.searchpath("xuxu", path)
-- search fails; check that message has an occurrence of
-- '??????????' with ? replaced by xuxu and at least 'max' lines
assert(not s and
string.find(err, string.rep("xuxu", 10)) and
#string.gsub(err, "[^\n]", "") >= max)
-- path with one very long template
local path = string.rep("?", max)
local s, err = package.searchpath("xuxu", path)
assert(not s and string.find(err, string.rep('xuxu', max)))
end
do
local oldpath = package.path
package.path = {}
local s, err = pcall(require, "no-such-file")
assert(not s and string.find(err, "package.path"))
package.path = oldpath
end
do print"testing 'require' message"
local oldpath = package.path
local oldcpath = package.cpath
package.path = "?.lua;?/?"
package.cpath = "?.so;?/init"
local st, msg = pcall(require, 'XXX')
local expected = [[module 'XXX' not found:
no field package.preload['XXX']
no file 'XXX.lua'
no file 'XXX/XXX'
no file 'XXX.so'
no file 'XXX/init']]
assert(msg == expected)
package.path = oldpath
package.cpath = oldcpath
end
print('+')
-- The next tests for 'require' assume some specific directories and
-- libraries.
if not _port then --[
local dirsep = string.match(package.config, "^([^\n]+)\n")
-- auxiliary directory with C modules and temporary files
local DIR = "libs" .. dirsep
-- prepend DIR to a name and correct directory separators
local function D (x)
local x = string.gsub(x, "/", dirsep)
return DIR .. x
end
-- prepend DIR and pospend proper C lib. extension to a name
local function DC (x)
local ext = (dirsep == '\\') and ".dll" or ".so"
return D(x .. ext)
end
local function createfiles (files, preextras, posextras)
for n,c in pairs(files) do
io.output(D(n))
io.write(string.format(preextras, n))
io.write(c)
io.write(string.format(posextras, n))
io.close(io.output())
end
end
local function removefiles (files)
for n in pairs(files) do
os.remove(D(n))
end
end
local files = {
["names.lua"] = "do return {...} end\n",
["err.lua"] = "B = 15; a = a + 1;",
["synerr.lua"] = "B =",
["A.lua"] = "",
["B.lua"] = "assert(...=='B');require 'A'",
["A.lc"] = "",
["A"] = "",
["L"] = "",
["XXxX"] = "",
["C.lua"] = "package.loaded[...] = 25; require'C'",
}
AA = nil
local extras = [[
NAME = '%s'
REQUIRED = ...
return AA]]
createfiles(files, "", extras)
-- testing explicit "dir" separator in 'searchpath'
assert(package.searchpath("C.lua", D"?", "", "") == D"C.lua")
assert(package.searchpath("C.lua", D"?", ".", ".") == D"C.lua")
assert(package.searchpath("--x-", D"?", "-", "X") == D"XXxX")
assert(package.searchpath("---xX", D"?", "---", "XX") == D"XXxX")
assert(package.searchpath(D"C.lua", "?", dirsep) == D"C.lua")
assert(package.searchpath(".\\C.lua", D"?", "\\") == D"./C.lua")
local oldpath = package.path
package.path = string.gsub("D/?.lua;D/?.lc;D/?;D/??x?;D/L", "D/", DIR)
local try = function (p, n, r, ext)
NAME = nil
local rr, x = require(p)
assert(NAME == n)
assert(REQUIRED == p)
assert(rr == r)
assert(ext == x)
end
local a = require"names"
assert(a[1] == "names" and a[2] == D"names.lua")
local st, msg = pcall(require, "err")
assert(not st and string.find(msg, "arithmetic") and B == 15)
st, msg = pcall(require, "synerr")
assert(not st and string.find(msg, "error loading module"))
assert(package.searchpath("C", package.path) == D"C.lua")
assert(require"C" == 25)
assert(require"C" == 25)
AA = nil
try('B', 'B.lua', true, "libs/B.lua")
assert(package.loaded.B)
assert(require"B" == true)
assert(package.loaded.A)
assert(require"C" == 25)
package.loaded.A = nil
try('B', nil, true, nil) -- should not reload package
try('A', 'A.lua', true, "libs/A.lua")
package.loaded.A = nil
os.remove(D'A.lua')
AA = {}
try('A', 'A.lc', AA, "libs/A.lc") -- now must find second option
assert(package.searchpath("A", package.path) == D"A.lc")
assert(require("A") == AA)
AA = false
try('K', 'L', false, "libs/L") -- default option
try('K', 'L', false, "libs/L") -- default option (should reload it)
assert(rawget(_G, "_REQUIREDNAME") == nil)
AA = "x"
try("X", "XXxX", AA, "libs/XXxX")
removefiles(files)
NAME, REQUIRED, AA, B = nil
-- testing require of sub-packages
local _G = _G
package.path = string.gsub("D/?.lua;D/?/init.lua", "D/", DIR)
files = {
["P1/init.lua"] = "AA = 10",
["P1/xuxu.lua"] = "AA = 20",
}
createfiles(files, "_ENV = {}\n", "\nreturn _ENV\n")
AA = 0
local m, ext = assert(require"P1")
assert(ext == "libs/P1/init.lua")
assert(AA == 0 and m.AA == 10)
assert(require"P1" == m)
assert(require"P1" == m)
assert(package.searchpath("P1.xuxu", package.path) == D"P1/xuxu.lua")
m.xuxu, ext = assert(require"P1.xuxu")
assert(AA == 0 and m.xuxu.AA == 20)
assert(ext == "libs/P1/xuxu.lua")
assert(require"P1.xuxu" == m.xuxu)
assert(require"P1.xuxu" == m.xuxu)
assert(require"P1" == m and m.AA == 10)
removefiles(files)
AA = nil
package.path = ""
assert(not pcall(require, "file_does_not_exist"))
package.path = "??\0?"
assert(not pcall(require, "file_does_not_exist1"))
package.path = oldpath
-- check 'require' error message
local fname = "file_does_not_exist2"
local m, err = pcall(require, fname)
for t in string.gmatch(package.path..";"..package.cpath, "[^;]+") do
t = string.gsub(t, "?", fname)
assert(string.find(err, t, 1, true))
end
do -- testing 'package.searchers' not being a table
local searchers = package.searchers
package.searchers = 3
local st, msg = pcall(require, 'a')
assert(not st and string.find(msg, "must be a table"))
package.searchers = searchers
end
local function import(...)
local f = {...}
return function (m)
for i=1, #f do m[f[i]] = _G[f[i]] end
end
end
-- cannot change environment of a C function
assert(not pcall(module, 'XUXU'))
-- testing require of C libraries
local p = "" -- On Mac OS X, redefine this to "_"
-- check whether loadlib works in this system
local st, err, when = package.loadlib(DC"lib1", "*")
if not st then
local f, err, when = package.loadlib("donotexist", p.."xuxu")
assert(not f and type(err) == "string" and when == "absent")
;(Message or print)('\n >>> cannot load dynamic library <<<\n')
print(err, when)
else
-- tests for loadlib
local f = assert(package.loadlib(DC"lib1", p.."onefunction"))
local a, b = f(15, 25)
assert(a == 25 and b == 15)
f = assert(package.loadlib(DC"lib1", p.."anotherfunc"))
assert(f(10, 20) == "10%20\n")
-- check error messages
local f, err, when = package.loadlib(DC"lib1", p.."xuxu")
assert(not f and type(err) == "string" and when == "init")
f, err, when = package.loadlib("donotexist", p.."xuxu")
assert(not f and type(err) == "string" and when == "open")
-- symbols from 'lib1' must be visible to other libraries
f = assert(package.loadlib(DC"lib11", p.."luaopen_lib11"))
assert(f() == "exported")
-- test C modules with prefixes in names
package.cpath = DC"?"
local lib2, ext = require"lib2-v2"
assert(string.find(ext, "libs/lib2-v2", 1, true))
-- check correct access to global environment and correct
-- parameters
assert(_ENV.x == "lib2-v2" and _ENV.y == DC"lib2-v2")
assert(lib2.id("x") == true) -- a different "id" implementation
-- test C submodules
local fs, ext = require"lib1.sub"
assert(_ENV.x == "lib1.sub" and _ENV.y == DC"lib1")
assert(string.find(ext, "libs/lib1", 1, true))
assert(fs.id(45) == 45)
_ENV.x, _ENV.y = nil
end
_ENV = _G
-- testing preload
do
local p = package
package = {}
p.preload.pl = function (...)
local _ENV = {...}
function xuxu (x) return x+20 end
return _ENV
end
local pl, ext = require"pl"
assert(require"pl" == pl)
assert(pl.xuxu(10) == 30)
assert(pl[1] == "pl" and pl[2] == ":preload:" and ext == ":preload:")
package = p
assert(type(package.path) == "string")
end
print('+')
end --]
print("testing assignments, logical operators, and constructors")
local res, res2 = 27
local a, b = 1, 2+3
assert(a==1 and b==5)
a={}
local function f() return 10, 11, 12 end
a.x, b, a[1] = 1, 2, f()
assert(a.x==1 and b==2 and a[1]==10)
a[f()], b, a[f()+3] = f(), a, 'x'
assert(a[10] == 10 and b == a and a[13] == 'x')
do
local f = function (n) local x = {}; for i=1,n do x[i]=i end;
return table.unpack(x) end;
local a,b,c
a,b = 0, f(1)
assert(a == 0 and b == 1)
a,b = 0, f(1)
assert(a == 0 and b == 1)
a,b,c = 0,5,f(4)
assert(a==0 and b==5 and c==1)
a,b,c = 0,5,f(0)
assert(a==0 and b==5 and c==nil)
end
local a, b, c, d = 1 and nil, 1 or nil, (1 and (nil or 1)), 6
assert(not a and b and c and d==6)
d = 20
a, b, c, d = f()
assert(a==10 and b==11 and c==12 and d==nil)
a,b = f(), 1, 2, 3, f()
assert(a==10 and b==1)
assert(a<b == false and a>b == true)
assert((10 and 2) == 2)
assert((10 or 2) == 10)
assert((10 or assert(nil)) == 10)
assert(not (nil and assert(nil)))
assert((nil or "alo") == "alo")
assert((nil and 10) == nil)
assert((false and 10) == false)
assert((true or 10) == true)
assert((false or 10) == 10)
assert(false ~= nil)
assert(nil ~= false)
assert(not nil == true)
assert(not not nil == false)
assert(not not 1 == true)
assert(not not a == true)
assert(not not (6 or nil) == true)
assert(not not (nil and 56) == false)
assert(not not (nil and true) == false)
assert(not 10 == false)
assert(not {} == false)
assert(not 0.5 == false)
assert(not "x" == false)
assert({} ~= {})
print('+')
a = {}
a[true] = 20
a[false] = 10
assert(a[1<2] == 20 and a[1>2] == 10)
function f(a) return a end
local a = {}
for i=3000,-3000,-1 do a[i + 0.0] = i; end
a[10e30] = "alo"; a[true] = 10; a[false] = 20
assert(a[10e30] == 'alo' and a[not 1] == 20 and a[10<20] == 10)
for i=3000,-3000,-1 do assert(a[i] == i); end
a[print] = assert
a[f] = print
a[a] = a
assert(a[a][a][a][a][print] == assert)
a[print](a[a[f]] == a[print])
assert(not pcall(function () local a = {}; a[nil] = 10 end))
assert(not pcall(function () local a = {[nil] = 10} end))
assert(a[nil] == undef)
a = nil
local a, b, c
a = {10,9,8,7,6,5,4,3,2; [-3]='a', [f]=print, a='a', b='ab'}
a, a.x, a.y = a, a[-3]
assert(a[1]==10 and a[-3]==a.a and a[f]==print and a.x=='a' and not a.y)
a[1], f(a)[2], b, c = {['alo']=assert}, 10, a[1], a[f], 6, 10, 23, f(a), 2
a[1].alo(a[2]==10 and b==10 and c==print)
a.aVeryLongName012345678901234567890123456789012345678901234567890123456789 = 10
local function foo ()
return a.aVeryLongName012345678901234567890123456789012345678901234567890123456789
end
assert(foo() == 10 and
a.aVeryLongName012345678901234567890123456789012345678901234567890123456789 ==
10)
do
-- _ENV constant
local function foo ()
local _ENV <const> = 11
X = "hi"
end
local st, msg = pcall(foo)
assert(not st and string.find(msg, "number"))
end
-- test of large float/integer indices
-- compute maximum integer where all bits fit in a float
local maxint = math.maxinteger
-- trim (if needed) to fit in a float
while maxint ~= (maxint + 0.0) or (maxint - 1) ~= (maxint - 1.0) do
maxint = maxint // 2
end
local maxintF = maxint + 0.0 -- float version
assert(maxintF == maxint and math.type(maxintF) == "float" and
maxintF >= 2.0^14)
-- floats and integers must index the same places
a[maxintF] = 10; a[maxintF - 1.0] = 11;
a[-maxintF] = 12; a[-maxintF + 1.0] = 13;
assert(a[maxint] == 10 and a[maxint - 1] == 11 and
a[-maxint] == 12 and a[-maxint + 1] == 13)
a[maxint] = 20
a[-maxint] = 22
assert(a[maxintF] == 20 and a[maxintF - 1.0] == 11 and
a[-maxintF] == 22 and a[-maxintF + 1.0] == 13)
a = nil
-- test conflicts in multiple assignment
do
local a,i,j,b
a = {'a', 'b'}; i=1; j=2; b=a
i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
b[3] == 1)
a = {}
local function foo () -- assigining to upvalues
b, a.x, a = a, 10, 20
end
foo()
assert(a == 20 and b.x == 10)
end
-- repeat test with upvalues
do
local a,i,j,b
a = {'a', 'b'}; i=1; j=2; b=a
local function foo ()
i, a[i], a, j, a[j], a[i+j] = j, i, i, b, j, i
end
foo()
assert(i == 2 and b[1] == 1 and a == 1 and j == b and b[2] == 2 and
b[3] == 1)
local t = {}
(function (a) t[a], a = 10, 20 end)(1);
assert(t[1] == 10)
end
-- bug in 5.2 beta
local function foo ()
local a
return function ()
local b
a, b = 3, 14 -- local and upvalue have same index
return a, b
end
end
local a, b = foo()()
assert(a == 3 and b == 14)
print('OK')
return res

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-- $Id: testes/big.lua $
-- See Copyright Notice in file all.lua
if _soft then
return 'a'
end
print "testing large tables"
local debug = require"debug"
local lim = 2^18 + 1000
local prog = { "local y = {0" }
for i = 1, lim do prog[#prog + 1] = i end
prog[#prog + 1] = "}\n"
prog[#prog + 1] = "X = y\n"
prog[#prog + 1] = ("assert(X[%d] == %d)"):format(lim - 1, lim - 2)
prog[#prog + 1] = "return 0"
prog = table.concat(prog, ";")
local env = {string = string, assert = assert}
local f = assert(load(prog, nil, nil, env))
f()
assert(env.X[lim] == lim - 1 and env.X[lim + 1] == lim)
for k in pairs(env) do env[k] = undef end
-- yields during accesses larger than K (in RK)
setmetatable(env, {
__index = function (t, n) coroutine.yield('g'); return _G[n] end,
__newindex = function (t, n, v) coroutine.yield('s'); _G[n] = v end,
})
X = nil
local co = coroutine.wrap(f)
assert(co() == 's')
assert(co() == 'g')
assert(co() == 'g')
assert(co() == 0)
assert(X[lim] == lim - 1 and X[lim + 1] == lim)
-- errors in accesses larger than K (in RK)
getmetatable(env).__index = function () end
getmetatable(env).__newindex = function () end
local e, m = pcall(f)
assert(not e and m:find("global 'X'"))
-- errors in metamethods
getmetatable(env).__newindex = function () error("hi") end
local e, m = xpcall(f, debug.traceback)
assert(not e and m:find("'newindex'"))
f, X = nil
coroutine.yield'b'
if 2^32 == 0 then -- (small integers) {
print "testing string length overflow"
local repstrings = 192 -- number of strings to be concatenated
local ssize = math.ceil(2.0^32 / repstrings) + 1 -- size of each string
assert(repstrings * ssize > 2.0^32) -- it should be larger than maximum size
local longs = string.rep("\0", ssize) -- create one long string
-- create function to concatenate 'repstrings' copies of its argument
local rep = assert(load(
"local a = ...; return " .. string.rep("a", repstrings, "..")))
local a, b = pcall(rep, longs) -- call that function
-- it should fail without creating string (result would be too large)
assert(not a and string.find(b, "overflow"))
end -- }
print'OK'
return 'a'

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-- $Id: testes/bitwise.lua $
-- See Copyright Notice in file all.lua
print("testing bitwise operations")
require "bwcoercion"
local numbits = string.packsize('j') * 8
assert(~0 == -1)
assert((1 << (numbits - 1)) == math.mininteger)
-- basic tests for bitwise operators;
-- use variables to avoid constant folding
local a, b, c, d
a = 0xFFFFFFFFFFFFFFFF
assert(a == -1 and a & -1 == a and a & 35 == 35)
a = 0xF0F0F0F0F0F0F0F0
assert(a | -1 == -1)
assert(a ~ a == 0 and a ~ 0 == a and a ~ ~a == -1)
assert(a >> 4 == ~a)
a = 0xF0; b = 0xCC; c = 0xAA; d = 0xFD
assert(a | b ~ c & d == 0xF4)
a = 0xF0.0; b = 0xCC.0; c = "0xAA.0"; d = "0xFD.0"
assert(a | b ~ c & d == 0xF4)
a = 0xF0000000; b = 0xCC000000;
c = 0xAA000000; d = 0xFD000000
assert(a | b ~ c & d == 0xF4000000)
assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
a = a << 32
b = b << 32
c = c << 32
d = d << 32
assert(a | b ~ c & d == 0xF4000000 << 32)
assert(~~a == a and ~a == -1 ~ a and -d == ~d + 1)
do -- constant folding
local code = string.format("return -1 >> %d", math.maxinteger)
assert(load(code)() == 0)
local code = string.format("return -1 >> %d", math.mininteger)
assert(load(code)() == 0)
local code = string.format("return -1 << %d", math.maxinteger)
assert(load(code)() == 0)
local code = string.format("return -1 << %d", math.mininteger)
assert(load(code)() == 0)
end
assert(-1 >> 1 == (1 << (numbits - 1)) - 1 and 1 << 31 == 0x80000000)
assert(-1 >> (numbits - 1) == 1)
assert(-1 >> numbits == 0 and
-1 >> -numbits == 0 and
-1 << numbits == 0 and
-1 << -numbits == 0)
assert(1 >> math.mininteger == 0)
assert(1 >> math.maxinteger == 0)
assert(1 << math.mininteger == 0)
assert(1 << math.maxinteger == 0)
assert((2^30 - 1) << 2^30 == 0)
assert((2^30 - 1) >> 2^30 == 0)
assert(1 >> -3 == 1 << 3 and 1000 >> 5 == 1000 << -5)
-- coercion from strings to integers
assert("0xffffffffffffffff" | 0 == -1)
assert("0xfffffffffffffffe" & "-1" == -2)
assert(" \t-0xfffffffffffffffe\n\t" & "-1" == 2)
assert(" \n -45 \t " >> " -2 " == -45 * 4)
assert("1234.0" << "5.0" == 1234 * 32)
assert("0xffff.0" ~ "0xAAAA" == 0x5555)
assert(~"0x0.000p4" == -1)
assert(("7" .. 3) << 1 == 146)
assert(0xffffffff >> (1 .. "9") == 0x1fff)
assert(10 | (1 .. "9") == 27)
do
local st, msg = pcall(function () return 4 & "a" end)
assert(string.find(msg, "'band'"))
local st, msg = pcall(function () return ~"a" end)
assert(string.find(msg, "'bnot'"))
end
-- out of range number
assert(not pcall(function () return "0xffffffffffffffff.0" | 0 end))
-- embedded zeros
assert(not pcall(function () return "0xffffffffffffffff\0" | 0 end))
print'+'
package.preload.bit32 = function () --{
-- no built-in 'bit32' library: implement it using bitwise operators
local bit = {}
function bit.bnot (a)
return ~a & 0xFFFFFFFF
end
--
-- in all vararg functions, avoid creating 'arg' table when there are
-- only 2 (or less) parameters, as 2 parameters is the common case
--
function bit.band (x, y, z, ...)
if not z then
return ((x or -1) & (y or -1)) & 0xFFFFFFFF
else
local arg = {...}
local res = x & y & z
for i = 1, #arg do res = res & arg[i] end
return res & 0xFFFFFFFF
end
end
function bit.bor (x, y, z, ...)
if not z then
return ((x or 0) | (y or 0)) & 0xFFFFFFFF
else
local arg = {...}
local res = x | y | z
for i = 1, #arg do res = res | arg[i] end
return res & 0xFFFFFFFF
end
end
function bit.bxor (x, y, z, ...)
if not z then
return ((x or 0) ~ (y or 0)) & 0xFFFFFFFF
else
local arg = {...}
local res = x ~ y ~ z
for i = 1, #arg do res = res ~ arg[i] end
return res & 0xFFFFFFFF
end
end
function bit.btest (...)
return bit.band(...) ~= 0
end
function bit.lshift (a, b)
return ((a & 0xFFFFFFFF) << b) & 0xFFFFFFFF
end
function bit.rshift (a, b)
return ((a & 0xFFFFFFFF) >> b) & 0xFFFFFFFF
end
function bit.arshift (a, b)
a = a & 0xFFFFFFFF
if b <= 0 or (a & 0x80000000) == 0 then
return (a >> b) & 0xFFFFFFFF
else
return ((a >> b) | ~(0xFFFFFFFF >> b)) & 0xFFFFFFFF
end
end
function bit.lrotate (a ,b)
b = b & 31
a = a & 0xFFFFFFFF
a = (a << b) | (a >> (32 - b))
return a & 0xFFFFFFFF
end
function bit.rrotate (a, b)
return bit.lrotate(a, -b)
end
local function checkfield (f, w)
w = w or 1
assert(f >= 0, "field cannot be negative")
assert(w > 0, "width must be positive")
assert(f + w <= 32, "trying to access non-existent bits")
return f, ~(-1 << w)
end
function bit.extract (a, f, w)
local f, mask = checkfield(f, w)
return (a >> f) & mask
end
function bit.replace (a, v, f, w)
local f, mask = checkfield(f, w)
v = v & mask
a = (a & ~(mask << f)) | (v << f)
return a & 0xFFFFFFFF
end
return bit
end --}
print("testing bitwise library")
local bit32 = require'bit32'
assert(bit32.band() == bit32.bnot(0))
assert(bit32.btest() == true)
assert(bit32.bor() == 0)
assert(bit32.bxor() == 0)
assert(bit32.band() == bit32.band(0xffffffff))
assert(bit32.band(1,2) == 0)
-- out-of-range numbers
assert(bit32.band(-1) == 0xffffffff)
assert(bit32.band((1 << 33) - 1) == 0xffffffff)
assert(bit32.band(-(1 << 33) - 1) == 0xffffffff)
assert(bit32.band((1 << 33) + 1) == 1)
assert(bit32.band(-(1 << 33) + 1) == 1)
assert(bit32.band(-(1 << 40)) == 0)
assert(bit32.band(1 << 40) == 0)
assert(bit32.band(-(1 << 40) - 2) == 0xfffffffe)
assert(bit32.band((1 << 40) - 4) == 0xfffffffc)
assert(bit32.lrotate(0, -1) == 0)
assert(bit32.lrotate(0, 7) == 0)
assert(bit32.lrotate(0x12345678, 0) == 0x12345678)
assert(bit32.lrotate(0x12345678, 32) == 0x12345678)
assert(bit32.lrotate(0x12345678, 4) == 0x23456781)
assert(bit32.rrotate(0x12345678, -4) == 0x23456781)
assert(bit32.lrotate(0x12345678, -8) == 0x78123456)
assert(bit32.rrotate(0x12345678, 8) == 0x78123456)
assert(bit32.lrotate(0xaaaaaaaa, 2) == 0xaaaaaaaa)
assert(bit32.lrotate(0xaaaaaaaa, -2) == 0xaaaaaaaa)
for i = -50, 50 do
assert(bit32.lrotate(0x89abcdef, i) == bit32.lrotate(0x89abcdef, i%32))
end
assert(bit32.lshift(0x12345678, 4) == 0x23456780)
assert(bit32.lshift(0x12345678, 8) == 0x34567800)
assert(bit32.lshift(0x12345678, -4) == 0x01234567)
assert(bit32.lshift(0x12345678, -8) == 0x00123456)
assert(bit32.lshift(0x12345678, 32) == 0)
assert(bit32.lshift(0x12345678, -32) == 0)
assert(bit32.rshift(0x12345678, 4) == 0x01234567)
assert(bit32.rshift(0x12345678, 8) == 0x00123456)
assert(bit32.rshift(0x12345678, 32) == 0)
assert(bit32.rshift(0x12345678, -32) == 0)
assert(bit32.arshift(0x12345678, 0) == 0x12345678)
assert(bit32.arshift(0x12345678, 1) == 0x12345678 // 2)
assert(bit32.arshift(0x12345678, -1) == 0x12345678 * 2)
assert(bit32.arshift(-1, 1) == 0xffffffff)
assert(bit32.arshift(-1, 24) == 0xffffffff)
assert(bit32.arshift(-1, 32) == 0xffffffff)
assert(bit32.arshift(-1, -1) == bit32.band(-1 * 2, 0xffffffff))
assert(0x12345678 << 4 == 0x123456780)
assert(0x12345678 << 8 == 0x1234567800)
assert(0x12345678 << -4 == 0x01234567)
assert(0x12345678 << -8 == 0x00123456)
assert(0x12345678 << 32 == 0x1234567800000000)
assert(0x12345678 << -32 == 0)
assert(0x12345678 >> 4 == 0x01234567)
assert(0x12345678 >> 8 == 0x00123456)
assert(0x12345678 >> 32 == 0)
assert(0x12345678 >> -32 == 0x1234567800000000)
print("+")
-- some special cases
local c = {0, 1, 2, 3, 10, 0x80000000, 0xaaaaaaaa, 0x55555555,
0xffffffff, 0x7fffffff}
for _, b in pairs(c) do
assert(bit32.band(b) == b)
assert(bit32.band(b, b) == b)
assert(bit32.band(b, b, b, b) == b)
assert(bit32.btest(b, b) == (b ~= 0))
assert(bit32.band(b, b, b) == b)
assert(bit32.band(b, b, b, ~b) == 0)
assert(bit32.btest(b, b, b) == (b ~= 0))
assert(bit32.band(b, bit32.bnot(b)) == 0)
assert(bit32.bor(b, bit32.bnot(b)) == bit32.bnot(0))
assert(bit32.bor(b) == b)
assert(bit32.bor(b, b) == b)
assert(bit32.bor(b, b, b) == b)
assert(bit32.bor(b, b, 0, ~b) == 0xffffffff)
assert(bit32.bxor(b) == b)
assert(bit32.bxor(b, b) == 0)
assert(bit32.bxor(b, b, b) == b)
assert(bit32.bxor(b, b, b, b) == 0)
assert(bit32.bxor(b, 0) == b)
assert(bit32.bnot(b) ~= b)
assert(bit32.bnot(bit32.bnot(b)) == b)
assert(bit32.bnot(b) == (1 << 32) - 1 - b)
assert(bit32.lrotate(b, 32) == b)
assert(bit32.rrotate(b, 32) == b)
assert(bit32.lshift(bit32.lshift(b, -4), 4) == bit32.band(b, bit32.bnot(0xf)))
assert(bit32.rshift(bit32.rshift(b, 4), -4) == bit32.band(b, bit32.bnot(0xf)))
end
-- for this test, use at most 24 bits (mantissa of a single float)
c = {0, 1, 2, 3, 10, 0x800000, 0xaaaaaa, 0x555555, 0xffffff, 0x7fffff}
for _, b in pairs(c) do
for i = -40, 40 do
local x = bit32.lshift(b, i)
local y = math.floor(math.fmod(b * 2.0^i, 2.0^32))
assert(math.fmod(x - y, 2.0^32) == 0)
end
end
assert(not pcall(bit32.band, {}))
assert(not pcall(bit32.bnot, "a"))
assert(not pcall(bit32.lshift, 45))
assert(not pcall(bit32.lshift, 45, print))
assert(not pcall(bit32.rshift, 45, print))
print("+")
-- testing extract/replace
assert(bit32.extract(0x12345678, 0, 4) == 8)
assert(bit32.extract(0x12345678, 4, 4) == 7)
assert(bit32.extract(0xa0001111, 28, 4) == 0xa)
assert(bit32.extract(0xa0001111, 31, 1) == 1)
assert(bit32.extract(0x50000111, 31, 1) == 0)
assert(bit32.extract(0xf2345679, 0, 32) == 0xf2345679)
assert(not pcall(bit32.extract, 0, -1))
assert(not pcall(bit32.extract, 0, 32))
assert(not pcall(bit32.extract, 0, 0, 33))
assert(not pcall(bit32.extract, 0, 31, 2))
assert(bit32.replace(0x12345678, 5, 28, 4) == 0x52345678)
assert(bit32.replace(0x12345678, 0x87654321, 0, 32) == 0x87654321)
assert(bit32.replace(0, 1, 2) == 2^2)
assert(bit32.replace(0, -1, 4) == 2^4)
assert(bit32.replace(-1, 0, 31) == (1 << 31) - 1)
assert(bit32.replace(-1, 0, 1, 2) == (1 << 32) - 7)
-- testing conversion of floats
assert(bit32.bor(3.0) == 3)
assert(bit32.bor(-4.0) == 0xfffffffc)
-- large floats and large-enough integers?
if 2.0^50 < 2.0^50 + 1.0 and 2.0^50 < (-1 >> 1) then
assert(bit32.bor(2.0^32 - 5.0) == 0xfffffffb)
assert(bit32.bor(-2.0^32 - 6.0) == 0xfffffffa)
assert(bit32.bor(2.0^48 - 5.0) == 0xfffffffb)
assert(bit32.bor(-2.0^48 - 6.0) == 0xfffffffa)
end
print'OK'

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local tonumber, tointeger = tonumber, math.tointeger
local type, getmetatable, rawget, error = type, getmetatable, rawget, error
local strsub = string.sub
local print = print
_ENV = nil
-- Try to convert a value to an integer, without assuming any coercion.
local function toint (x)
x = tonumber(x) -- handle numerical strings
if not x then
return false -- not coercible to a number
end
return tointeger(x)
end
-- If operation fails, maybe second operand has a metamethod that should
-- have been called if not for this string metamethod, so try to
-- call it.
local function trymt (x, y, mtname)
if type(y) ~= "string" then -- avoid recalling original metamethod
local mt = getmetatable(y)
local mm = mt and rawget(mt, mtname)
if mm then
return mm(x, y)
end
end
-- if any test fails, there is no other metamethod to be called
error("attempt to '" .. strsub(mtname, 3) ..
"' a " .. type(x) .. " with a " .. type(y), 4)
end
local function checkargs (x, y, mtname)
local xi = toint(x)
local yi = toint(y)
if xi and yi then
return xi, yi
else
return trymt(x, y, mtname), nil
end
end
local smt = getmetatable("")
smt.__band = function (x, y)
local x, y = checkargs(x, y, "__band")
return y and x & y or x
end
smt.__bor = function (x, y)
local x, y = checkargs(x, y, "__bor")
return y and x | y or x
end
smt.__bxor = function (x, y)
local x, y = checkargs(x, y, "__bxor")
return y and x ~ y or x
end
smt.__shl = function (x, y)
local x, y = checkargs(x, y, "__shl")
return y and x << y or x
end
smt.__shr = function (x, y)
local x, y = checkargs(x, y, "__shr")
return y and x >> y or x
end
smt.__bnot = function (x)
local x, y = checkargs(x, x, "__bnot")
return y and ~x or x
end

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-- $Id: testes/calls.lua $
-- See Copyright Notice in file all.lua
print("testing functions and calls")
local debug = require "debug"
-- get the opportunity to test 'type' too ;)
assert(type(1<2) == 'boolean')
assert(type(true) == 'boolean' and type(false) == 'boolean')
assert(type(nil) == 'nil'
and type(-3) == 'number'
and type'x' == 'string'
and type{} == 'table'
and type(type) == 'function')
assert(type(assert) == type(print))
local function f (x) return a:x (x) end
assert(type(f) == 'function')
assert(not pcall(type))
-- testing local-function recursion
fact = false
do
local res = 1
local function fact (n)
if n==0 then return res
else return n*fact(n-1)
end
end
assert(fact(5) == 120)
end
assert(fact == false)
fact = nil
-- testing declarations
local a = {i = 10}
local self = 20
function a:x (x) return x+self.i end
function a.y (x) return x+self end
assert(a:x(1)+10 == a.y(1))
a.t = {i=-100}
a["t"].x = function (self, a,b) return self.i+a+b end
assert(a.t:x(2,3) == -95)
do
local a = {x=0}
function a:add (x) self.x, a.y = self.x+x, 20; return self end
assert(a:add(10):add(20):add(30).x == 60 and a.y == 20)
end
local a = {b={c={}}}
function a.b.c.f1 (x) return x+1 end
function a.b.c:f2 (x,y) self[x] = y end
assert(a.b.c.f1(4) == 5)
a.b.c:f2('k', 12); assert(a.b.c.k == 12)
print('+')
t = nil -- 'declare' t
function f(a,b,c) local d = 'a'; t={a,b,c,d} end
f( -- this line change must be valid
1,2)
assert(t[1] == 1 and t[2] == 2 and t[3] == nil and t[4] == 'a')
f(1,2, -- this one too
3,4)
assert(t[1] == 1 and t[2] == 2 and t[3] == 3 and t[4] == 'a')
t = nil -- delete 't'
function fat(x)
if x <= 1 then return 1
else return x*load("return fat(" .. x-1 .. ")", "")()
end
end
assert(load "load 'assert(fat(6)==720)' () ")()
a = load('return fat(5), 3')
local a,b = a()
assert(a == 120 and b == 3)
fat = nil
print('+')
local function err_on_n (n)
if n==0 then error(); exit(1);
else err_on_n (n-1); exit(1);
end
end
do
local function dummy (n)
if n > 0 then
assert(not pcall(err_on_n, n))
dummy(n-1)
end
end
dummy(10)
end
_G.deep = nil -- "declaration" (used by 'all.lua')
function deep (n)
if n>0 then deep(n-1) end
end
deep(10)
deep(180)
print"testing tail calls"
function deep (n) if n>0 then return deep(n-1) else return 101 end end
assert(deep(30000) == 101)
a = {}
function a:deep (n) if n>0 then return self:deep(n-1) else return 101 end end
assert(a:deep(30000) == 101)
do -- tail calls x varargs
local function foo (x, ...) local a = {...}; return x, a[1], a[2] end
local function foo1 (x) return foo(10, x, x + 1) end
local a, b, c = foo1(-2)
assert(a == 10 and b == -2 and c == -1)
-- tail calls x metamethods
local t = setmetatable({}, {__call = foo})
local function foo2 (x) return t(10, x) end
a, b, c = foo2(100)
assert(a == t and b == 10 and c == 100)
a, b = (function () return foo() end)()
assert(a == nil and b == nil)
local X, Y, A
local function foo (x, y, ...) X = x; Y = y; A = {...} end
local function foo1 (...) return foo(...) end
local a, b, c = foo1()
assert(X == nil and Y == nil and #A == 0)
a, b, c = foo1(10)
assert(X == 10 and Y == nil and #A == 0)
a, b, c = foo1(10, 20)
assert(X == 10 and Y == 20 and #A == 0)
a, b, c = foo1(10, 20, 30)
assert(X == 10 and Y == 20 and #A == 1 and A[1] == 30)
end
do -- C-stack overflow while handling C-stack overflow
local function loop ()
assert(pcall(loop))
end
local err, msg = xpcall(loop, loop)
assert(not err and string.find(msg, "error"))
end
do -- tail calls x chain of __call
local n = 10000 -- depth
local function foo ()
if n == 0 then return 1023
else n = n - 1; return foo()
end
end
-- build a chain of __call metamethods ending in function 'foo'
for i = 1, 100 do
foo = setmetatable({}, {__call = foo})
end
-- call the first one as a tail call in a new coroutine
-- (to ensure stack is not preallocated)
assert(coroutine.wrap(function() return foo() end)() == 1023)
end
print('+')
do -- testing chains of '__call'
local N = 20
local u = table.pack
for i = 1, N do
u = setmetatable({i}, {__call = u})
end
local Res = u("a", "b", "c")
assert(Res.n == N + 3)
for i = 1, N do
assert(Res[i][1] == i)
end
assert(Res[N + 1] == "a" and Res[N + 2] == "b" and Res[N + 3] == "c")
end
a = nil
(function (x) a=x end)(23)
assert(a == 23 and (function (x) return x*2 end)(20) == 40)
-- testing closures
-- fixed-point operator
local Z = function (le)
local function a (f)
return le(function (x) return f(f)(x) end)
end
return a(a)
end
-- non-recursive factorial
local F = function (f)
return function (n)
if n == 0 then return 1
else return n*f(n-1) end
end
end
local fat = Z(F)
assert(fat(0) == 1 and fat(4) == 24 and Z(F)(5)==5*Z(F)(4))
local function g (z)
local function f (a,b,c,d)
return function (x,y) return a+b+c+d+a+x+y+z end
end
return f(z,z+1,z+2,z+3)
end
local f = g(10)
assert(f(9, 16) == 10+11+12+13+10+9+16+10)
print('+')
-- testing multiple returns
local function unlpack (t, i)
i = i or 1
if (i <= #t) then
return t[i], unlpack(t, i+1)
end
end
local function equaltab (t1, t2)
assert(#t1 == #t2)
for i = 1, #t1 do
assert(t1[i] == t2[i])
end
end
local pack = function (...) return (table.pack(...)) end
local function f() return 1,2,30,4 end
local function ret2 (a,b) return a,b end
local a,b,c,d = unlpack{1,2,3}
assert(a==1 and b==2 and c==3 and d==nil)
a = {1,2,3,4,false,10,'alo',false,assert}
equaltab(pack(unlpack(a)), a)
equaltab(pack(unlpack(a), -1), {1,-1})
a,b,c,d = ret2(f()), ret2(f())
assert(a==1 and b==1 and c==2 and d==nil)
a,b,c,d = unlpack(pack(ret2(f()), ret2(f())))
assert(a==1 and b==1 and c==2 and d==nil)
a,b,c,d = unlpack(pack(ret2(f()), (ret2(f()))))
assert(a==1 and b==1 and c==nil and d==nil)
a = ret2{ unlpack{1,2,3}, unlpack{3,2,1}, unlpack{"a", "b"}}
assert(a[1] == 1 and a[2] == 3 and a[3] == "a" and a[4] == "b")
-- testing calls with 'incorrect' arguments
rawget({}, "x", 1)
rawset({}, "x", 1, 2)
assert(math.sin(1,2) == math.sin(1))
table.sort({10,9,8,4,19,23,0,0}, function (a,b) return a<b end, "extra arg")
-- test for generic load
local x = "-- a comment\0\0\0\n x = 10 + \n23; \
local a = function () x = 'hi' end; \
return '\0'"
local function read1 (x)
local i = 0
return function ()
collectgarbage()
i=i+1
return string.sub(x, i, i)
end
end
local function cannotload (msg, a,b)
assert(not a and string.find(b, msg))
end
a = assert(load(read1(x), "modname", "t", _G))
assert(a() == "\0" and _G.x == 33)
assert(debug.getinfo(a).source == "modname")
-- cannot read text in binary mode
cannotload("attempt to load a text chunk", load(read1(x), "modname", "b", {}))
cannotload("attempt to load a text chunk", load(x, "modname", "b"))
a = assert(load(function () return nil end))
a() -- empty chunk
assert(not load(function () return true end))
-- small bug
local t = {nil, "return ", "3"}
f, msg = load(function () return table.remove(t, 1) end)
assert(f() == nil) -- should read the empty chunk
-- another small bug (in 5.2.1)
f = load(string.dump(function () return 1 end), nil, "b", {})
assert(type(f) == "function" and f() == 1)
do -- another bug (in 5.4.0)
-- loading a binary long string interrupted by GC cycles
local f = string.dump(function ()
return '01234567890123456789012345678901234567890123456789'
end)
f = load(read1(f))
assert(f() == '01234567890123456789012345678901234567890123456789')
end
x = string.dump(load("x = 1; return x"))
a = assert(load(read1(x), nil, "b"))
assert(a() == 1 and _G.x == 1)
cannotload("attempt to load a binary chunk", load(read1(x), nil, "t"))
cannotload("attempt to load a binary chunk", load(x, nil, "t"))
_G.x = nil
assert(not pcall(string.dump, print)) -- no dump of C functions
cannotload("unexpected symbol", load(read1("*a = 123")))
cannotload("unexpected symbol", load("*a = 123"))
cannotload("hhi", load(function () error("hhi") end))
-- any value is valid for _ENV
assert(load("return _ENV", nil, nil, 123)() == 123)
-- load when _ENV is not first upvalue
local x; XX = 123
local function h ()
local y=x -- use 'x', so that it becomes 1st upvalue
return XX -- global name
end
local d = string.dump(h)
x = load(d, "", "b")
assert(debug.getupvalue(x, 2) == '_ENV')
debug.setupvalue(x, 2, _G)
assert(x() == 123)
assert(assert(load("return XX + ...", nil, nil, {XX = 13}))(4) == 17)
XX = nil
-- test generic load with nested functions
x = [[
return function (x)
return function (y)
return function (z)
return x+y+z
end
end
end
]]
a = assert(load(read1(x), "read", "t"))
assert(a()(2)(3)(10) == 15)
-- repeat the test loading a binary chunk
x = string.dump(a)
a = assert(load(read1(x), "read", "b"))
assert(a()(2)(3)(10) == 15)
-- test for dump/undump with upvalues
local a, b = 20, 30
x = load(string.dump(function (x)
if x == "set" then a = 10+b; b = b+1 else
return a
end
end), "", "b", nil)
assert(x() == nil)
assert(debug.setupvalue(x, 1, "hi") == "a")
assert(x() == "hi")
assert(debug.setupvalue(x, 2, 13) == "b")
assert(not debug.setupvalue(x, 3, 10)) -- only 2 upvalues
x("set")
assert(x() == 23)
x("set")
assert(x() == 24)
-- test for dump/undump with many upvalues
do
local nup = 200 -- maximum number of local variables
local prog = {"local a1"}
for i = 2, nup do prog[#prog + 1] = ", a" .. i end
prog[#prog + 1] = " = 1"
for i = 2, nup do prog[#prog + 1] = ", " .. i end
local sum = 1
prog[#prog + 1] = "; return function () return a1"
for i = 2, nup do prog[#prog + 1] = " + a" .. i; sum = sum + i end
prog[#prog + 1] = " end"
prog = table.concat(prog)
local f = assert(load(prog))()
assert(f() == sum)
f = load(string.dump(f)) -- main chunk now has many upvalues
local a = 10
local h = function () return a end
for i = 1, nup do
debug.upvaluejoin(f, i, h, 1)
end
assert(f() == 10 * nup)
end
-- test for long method names
do
local t = {x = 1}
function t:_012345678901234567890123456789012345678901234567890123456789 ()
return self.x
end
assert(t:_012345678901234567890123456789012345678901234567890123456789() == 1)
end
-- test for bug in parameter adjustment
assert((function () return nil end)(4) == nil)
assert((function () local a; return a end)(4) == nil)
assert((function (a) return a end)() == nil)
print("testing binary chunks")
do
local header = string.pack("c4BBc6BBB",
"\27Lua", -- signature
0x54, -- version 5.4 (0x54)
0, -- format
"\x19\x93\r\n\x1a\n", -- data
4, -- size of instruction
string.packsize("j"), -- sizeof(lua integer)
string.packsize("n") -- sizeof(lua number)
)
local c = string.dump(function ()
local a = 1; local b = 3;
local f = function () return a + b + _ENV.c; end -- upvalues
local s1 = "a constant"
local s2 = "another constant"
return a + b * 3
end)
assert(assert(load(c))() == 10)
-- check header
assert(string.sub(c, 1, #header) == header)
-- check LUAC_INT and LUAC_NUM
local ci, cn = string.unpack("jn", c, #header + 1)
assert(ci == 0x5678 and cn == 370.5)
-- corrupted header
for i = 1, #header do
local s = string.sub(c, 1, i - 1) ..
string.char(string.byte(string.sub(c, i, i)) + 1) ..
string.sub(c, i + 1, -1)
assert(#s == #c)
assert(not load(s))
end
-- loading truncated binary chunks
for i = 1, #c - 1 do
local st, msg = load(string.sub(c, 1, i))
assert(not st and string.find(msg, "truncated"))
end
end
print('OK')
return deep

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-- $Id: testes/closure.lua $
-- See Copyright Notice in file all.lua
print "testing closures"
local A,B = 0,{g=10}
local function f(x)
local a = {}
for i=1,1000 do
local y = 0
do
a[i] = function () B.g = B.g+1; y = y+x; return y+A end
end
end
local dummy = function () return a[A] end
collectgarbage()
A = 1; assert(dummy() == a[1]); A = 0;
assert(a[1]() == x)
assert(a[3]() == x)
collectgarbage()
assert(B.g == 12)
return a
end
local a = f(10)
-- force a GC in this level
local x = {[1] = {}} -- to detect a GC
setmetatable(x, {__mode = 'kv'})
while x[1] do -- repeat until GC
local a = A..A..A..A -- create garbage
A = A+1
end
assert(a[1]() == 20+A)
assert(a[1]() == 30+A)
assert(a[2]() == 10+A)
collectgarbage()
assert(a[2]() == 20+A)
assert(a[2]() == 30+A)
assert(a[3]() == 20+A)
assert(a[8]() == 10+A)
assert(getmetatable(x).__mode == 'kv')
assert(B.g == 19)
-- testing equality
a = {}
for i = 1, 5 do a[i] = function (x) return i + a + _ENV end end
assert(a[3] ~= a[4] and a[4] ~= a[5])
do
local a = function (x) return math.sin(_ENV[x]) end
local function f()
return a
end
assert(f() == f())
end
-- testing closures with 'for' control variable
a = {}
for i=1,10 do
a[i] = {set = function(x) i=x end, get = function () return i end}
if i == 3 then break end
end
assert(a[4] == undef)
a[1].set(10)
assert(a[2].get() == 2)
a[2].set('a')
assert(a[3].get() == 3)
assert(a[2].get() == 'a')
a = {}
local t = {"a", "b"}
for i = 1, #t do
local k = t[i]
a[i] = {set = function(x, y) i=x; k=y end,
get = function () return i, k end}
if i == 2 then break end
end
a[1].set(10, 20)
local r,s = a[2].get()
assert(r == 2 and s == 'b')
r,s = a[1].get()
assert(r == 10 and s == 20)
a[2].set('a', 'b')
r,s = a[2].get()
assert(r == "a" and s == "b")
-- testing closures with 'for' control variable x break
local f
for i=1,3 do
f = function () return i end
break
end
assert(f() == 1)
for k = 1, #t do
local v = t[k]
f = function () return k, v end
break
end
assert(({f()})[1] == 1)
assert(({f()})[2] == "a")
-- testing closure x break x return x errors
local b
function f(x)
local first = 1
while 1 do
if x == 3 and not first then return end
local a = 'xuxu'
b = function (op, y)
if op == 'set' then
a = x+y
else
return a
end
end
if x == 1 then do break end
elseif x == 2 then return
else if x ~= 3 then error() end
end
first = nil
end
end
for i=1,3 do
f(i)
assert(b('get') == 'xuxu')
b('set', 10); assert(b('get') == 10+i)
b = nil
end
pcall(f, 4);
assert(b('get') == 'xuxu')
b('set', 10); assert(b('get') == 14)
local y, w
-- testing multi-level closure
function f(x)
return function (y)
return function (z) return w+x+y+z end
end
end
y = f(10)
w = 1.345
assert(y(20)(30) == 60+w)
-- testing closures x break
do
local X, Y
local a = math.sin(0)
while a do
local b = 10
X = function () return b end -- closure with upvalue
if a then break end
end
do
local b = 20
Y = function () return b end -- closure with upvalue
end
-- upvalues must be different
assert(X() == 10 and Y() == 20)
end
-- testing closures x repeat-until
local a = {}
local i = 1
repeat
local x = i
a[i] = function () i = x+1; return x end
until i > 10 or a[i]() ~= x
assert(i == 11 and a[1]() == 1 and a[3]() == 3 and i == 4)
-- testing closures created in 'then' and 'else' parts of 'if's
a = {}
for i = 1, 10 do
if i % 3 == 0 then
local y = 0
a[i] = function (x) local t = y; y = x; return t end
elseif i % 3 == 1 then
goto L1
error'not here'
::L1::
local y = 1
a[i] = function (x) local t = y; y = x; return t end
elseif i % 3 == 2 then
local t
goto l4
::l4a:: a[i] = t; goto l4b
error("should never be here!")
::l4::
local y = 2
t = function (x) local t = y; y = x; return t end
goto l4a
error("should never be here!")
::l4b::
end
end
for i = 1, 10 do
assert(a[i](i * 10) == i % 3 and a[i]() == i * 10)
end
print'+'
-- test for correctly closing upvalues in tail calls of vararg functions
local function t ()
local function c(a,b) assert(a=="test" and b=="OK") end
local function v(f, ...) c("test", f() ~= 1 and "FAILED" or "OK") end
local x = 1
return v(function() return x end)
end
t()
-- test for debug manipulation of upvalues
local debug = require'debug'
local foo1, foo2, foo3
do
local a , b, c = 3, 5, 7
foo1 = function () return a+b end;
foo2 = function () return b+a end;
do
local a = 10
foo3 = function () return a+b end;
end
end
assert(debug.upvalueid(foo1, 1))
assert(debug.upvalueid(foo1, 2))
assert(not debug.upvalueid(foo1, 3))
assert(debug.upvalueid(foo1, 1) == debug.upvalueid(foo2, 2))
assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo2, 1))
assert(debug.upvalueid(foo3, 1))
assert(debug.upvalueid(foo1, 1) ~= debug.upvalueid(foo3, 1))
assert(debug.upvalueid(foo1, 2) == debug.upvalueid(foo3, 2))
assert(debug.upvalueid(string.gmatch("x", "x"), 1) ~= nil)
assert(foo1() == 3 + 5 and foo2() == 5 + 3)
debug.upvaluejoin(foo1, 2, foo2, 2)
assert(foo1() == 3 + 3 and foo2() == 5 + 3)
assert(foo3() == 10 + 5)
debug.upvaluejoin(foo3, 2, foo2, 1)
assert(foo3() == 10 + 5)
debug.upvaluejoin(foo3, 2, foo2, 2)
assert(foo3() == 10 + 3)
assert(not pcall(debug.upvaluejoin, foo1, 3, foo2, 1))
assert(not pcall(debug.upvaluejoin, foo1, 1, foo2, 3))
assert(not pcall(debug.upvaluejoin, foo1, 0, foo2, 1))
assert(not pcall(debug.upvaluejoin, print, 1, foo2, 1))
assert(not pcall(debug.upvaluejoin, {}, 1, foo2, 1))
assert(not pcall(debug.upvaluejoin, foo1, 1, print, 1))
print'OK'

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-- $Id: testes/code.lua $
-- See Copyright Notice in file all.lua
if T==nil then
(Message or print)('\n >>> testC not active: skipping opcode tests <<<\n')
return
end
print "testing code generation and optimizations"
-- to test constant propagation
local k0aux <const> = 0
local k0 <const> = k0aux
local k1 <const> = 1
local k3 <const> = 3
local k6 <const> = k3 + (k3 << k0)
local kFF0 <const> = 0xFF0
local k3_78 <const> = 3.78
local x, k3_78_4 <const> = 10, k3_78 / 4
assert(x == 10)
local kx <const> = "x"
local kTrue <const> = true
local kFalse <const> = false
local kNil <const> = nil
-- this code gave an error for the code checker
do
local function f (a)
for k,v,w in a do end
end
end
-- testing reuse in constant table
local function checkKlist (func, list)
local k = T.listk(func)
assert(#k == #list)
for i = 1, #k do
assert(k[i] == list[i] and math.type(k[i]) == math.type(list[i]))
end
end
local function foo ()
local a
a = k3;
a = 0; a = 0.0; a = -7 + 7
a = k3_78/4; a = k3_78_4
a = -k3_78/4; a = k3_78/4; a = -3.78/4
a = -3.79/4; a = 0.0; a = -0;
a = k3; a = 3.0; a = 3; a = 3.0
end
checkKlist(foo, {3.78/4, -3.78/4, -3.79/4})
foo = function (f, a)
f(100 * 1000)
f(100.0 * 1000)
f(-100 * 1000)
f(-100 * 1000.0)
f(100000)
f(100000.0)
f(-100000)
f(-100000.0)
end
checkKlist(foo, {100000, 100000.0, -100000, -100000.0})
-- floats x integers
foo = function (t, a)
t[a] = 1; t[a] = 1.0
t[a] = 1; t[a] = 1.0
t[a] = 2; t[a] = 2.0
t[a] = 0; t[a] = 0.0
t[a] = 1; t[a] = 1.0
t[a] = 2; t[a] = 2.0
t[a] = 0; t[a] = 0.0
end
checkKlist(foo, {1, 1.0, 2, 2.0, 0, 0.0})
-- testing opcodes
-- check that 'f' opcodes match '...'
local function check (f, ...)
local arg = {...}
local c = T.listcode(f)
for i=1, #arg do
local opcode = string.match(c[i], "%u%w+")
-- print(arg[i], opcode)
assert(arg[i] == opcode)
end
assert(c[#arg+2] == undef)
end
-- check that 'f' opcodes match '...' and that 'f(p) == r'.
local function checkR (f, p, r, ...)
local r1 = f(p)
assert(r == r1 and math.type(r) == math.type(r1))
check(f, ...)
end
-- check that 'a' and 'b' has the same opcodes
local function checkequal (a, b)
a = T.listcode(a)
b = T.listcode(b)
assert(#a == #b)
for i = 1, #a do
a[i] = string.gsub(a[i], '%b()', '') -- remove line number
b[i] = string.gsub(b[i], '%b()', '') -- remove line number
assert(a[i] == b[i])
end
end
-- some basic instructions
check(function () -- function does not create upvalues
(function () end){f()}
end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
'SETLIST', 'CALL', 'RETURN0')
check(function (x) -- function creates upvalues
(function () return x end){f()}
end, 'CLOSURE', 'NEWTABLE', 'EXTRAARG', 'GETTABUP', 'CALL',
'SETLIST', 'CALL', 'RETURN')
-- sequence of LOADNILs
check(function ()
local kNil <const> = nil
local a,b,c
local d; local e;
local f,g,h;
d = nil; d=nil; b=nil; a=kNil; c=nil;
end, 'LOADNIL', 'RETURN0')
check(function ()
local a,b,c,d = 1,1,1,1
d=nil;c=nil;b=nil;a=nil
end, 'LOADI', 'LOADI', 'LOADI', 'LOADI', 'LOADNIL', 'RETURN0')
do
local a,b,c,d = 1,1,1,1
d=nil;c=nil;b=nil;a=nil
assert(a == nil and b == nil and c == nil and d == nil)
end
-- single return
check (function (a,b,c) return a end, 'RETURN1')
-- infinite loops
check(function () while kTrue do local a = -1 end end,
'LOADI', 'JMP', 'RETURN0')
check(function () while 1 do local a = -1 end end,
'LOADI', 'JMP', 'RETURN0')
check(function () repeat local x = 1 until true end,
'LOADI', 'RETURN0')
-- concat optimization
check(function (a,b,c,d) return a..b..c..d end,
'MOVE', 'MOVE', 'MOVE', 'MOVE', 'CONCAT', 'RETURN1')
-- not
check(function () return not not nil end, 'LOADFALSE', 'RETURN1')
check(function () return not not kFalse end, 'LOADFALSE', 'RETURN1')
check(function () return not not true end, 'LOADTRUE', 'RETURN1')
check(function () return not not k3 end, 'LOADTRUE', 'RETURN1')
-- direct access to locals
check(function ()
local a,b,c,d
a = b*a
c.x, a[b] = -((a + d/b - a[b]) ^ a.x), b
end,
'LOADNIL',
'MUL', 'MMBIN',
'DIV', 'MMBIN', 'ADD', 'MMBIN', 'GETTABLE', 'SUB', 'MMBIN',
'GETFIELD', 'POW', 'MMBIN', 'UNM', 'SETTABLE', 'SETFIELD', 'RETURN0')
-- direct access to constants
check(function ()
local a,b
local c = kNil
a[kx] = 3.2
a.x = b
a[b] = 'x'
end,
'LOADNIL', 'SETFIELD', 'SETFIELD', 'SETTABLE', 'RETURN0')
-- "get/set table" with numeric indices
check(function (a)
local k255 <const> = 255
a[1] = a[100]
a[k255] = a[256]
a[256] = 5
end,
'GETI', 'SETI',
'LOADI', 'GETTABLE', 'SETI',
'LOADI', 'SETTABLE', 'RETURN0')
check(function ()
local a,b
a = a - a
b = a/a
b = 5-4
end,
'LOADNIL', 'SUB', 'MMBIN', 'DIV', 'MMBIN', 'LOADI', 'RETURN0')
check(function ()
local a,b
a[kTrue] = false
end,
'LOADNIL', 'LOADTRUE', 'SETTABLE', 'RETURN0')
-- equalities
checkR(function (a) if a == 1 then return 2 end end, 1, 2,
'EQI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if -4.0 == a then return 2 end end, -4, 2,
'EQI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if a == "hi" then return 2 end end, 10, nil,
'EQK', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if a == 10000 then return 2 end end, 1, nil,
'EQK', 'JMP', 'LOADI', 'RETURN1') -- number too large
checkR(function (a) if -10000 == a then return 2 end end, -10000, 2,
'EQK', 'JMP', 'LOADI', 'RETURN1') -- number too large
-- comparisons
checkR(function (a) if -10 <= a then return 2 end end, -10, 2,
'GEI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if 128.0 > a then return 2 end end, 129, nil,
'LTI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if -127.0 < a then return 2 end end, -127, nil,
'GTI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if 10 < a then return 2 end end, 11, 2,
'GTI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if 129 < a then return 2 end end, 130, 2,
'LOADI', 'LT', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if a >= 23.0 then return 2 end end, 25, 2,
'GEI', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if a >= 23.1 then return 2 end end, 0, nil,
'LOADK', 'LE', 'JMP', 'LOADI', 'RETURN1')
checkR(function (a) if a > 2300.0 then return 2 end end, 0, nil,
'LOADF', 'LT', 'JMP', 'LOADI', 'RETURN1')
-- constant folding
local function checkK (func, val)
check(func, 'LOADK', 'RETURN1')
checkKlist(func, {val})
assert(func() == val)
end
local function checkI (func, val)
check(func, 'LOADI', 'RETURN1')
checkKlist(func, {})
assert(func() == val)
end
local function checkF (func, val)
check(func, 'LOADF', 'RETURN1')
checkKlist(func, {})
assert(func() == val)
end
checkF(function () return 0.0 end, 0.0)
checkI(function () return k0 end, 0)
checkI(function () return -k0//1 end, 0)
checkK(function () return 3^-1 end, 1/3)
checkK(function () return (1 + 1)^(50 + 50) end, 2^100)
checkK(function () return (-2)^(31 - 2) end, -0x20000000 + 0.0)
checkF(function () return (-k3^0 + 5) // 3.0 end, 1.0)
checkI(function () return -k3 % 5 end, 2)
checkF(function () return -((2.0^8 + -(-1)) % 8)/2 * 4 - 3 end, -5.0)
checkF(function () return -((2^8 + -(-1)) % 8)//2 * 4 - 3 end, -7.0)
checkI(function () return 0xF0.0 | 0xCC.0 ~ 0xAA & 0xFD end, 0xF4)
checkI(function () return ~(~kFF0 | kFF0) end, 0)
checkI(function () return ~~-1024.0 end, -1024)
checkI(function () return ((100 << k6) << -4) >> 2 end, 100)
-- borders around MAXARG_sBx ((((1 << 17) - 1) >> 1) == 65535)
local a = 17; local sbx = ((1 << a) - 1) >> 1 -- avoid folding
local border <const> = 65535
checkI(function () return border end, sbx)
checkI(function () return -border end, -sbx)
checkI(function () return border + 1 end, sbx + 1)
checkK(function () return border + 2 end, sbx + 2)
checkK(function () return -(border + 1) end, -(sbx + 1))
local border <const> = 65535.0
checkF(function () return border end, sbx + 0.0)
checkF(function () return -border end, -sbx + 0.0)
checkF(function () return border + 1 end, (sbx + 1.0))
checkK(function () return border + 2 end, (sbx + 2.0))
checkK(function () return -(border + 1) end, -(sbx + 1.0))
-- immediate operands
checkR(function (x) return x + k1 end, 10, 11, 'ADDI', 'MMBINI', 'RETURN1')
checkR(function (x) return x - 127 end, 10, -117, 'ADDI', 'MMBINI', 'RETURN1')
checkR(function (x) return 128 + x end, 0.0, 128.0,
'ADDI', 'MMBINI', 'RETURN1')
checkR(function (x) return x * -127 end, -1.0, 127.0,
'MULK', 'MMBINK', 'RETURN1')
checkR(function (x) return 20 * x end, 2, 40, 'MULK', 'MMBINK', 'RETURN1')
checkR(function (x) return x ^ -2 end, 2, 0.25, 'POWK', 'MMBINK', 'RETURN1')
checkR(function (x) return x / 40 end, 40, 1.0, 'DIVK', 'MMBINK', 'RETURN1')
checkR(function (x) return x // 1 end, 10.0, 10.0,
'IDIVK', 'MMBINK', 'RETURN1')
checkR(function (x) return x % (100 - 10) end, 91, 1,
'MODK', 'MMBINK', 'RETURN1')
checkR(function (x) return k1 << x end, 3, 8, 'SHLI', 'MMBINI', 'RETURN1')
checkR(function (x) return x << 127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
checkR(function (x) return x << -127 end, 10, 0, 'SHRI', 'MMBINI', 'RETURN1')
checkR(function (x) return x >> 128 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
checkR(function (x) return x >> -127 end, 8, 0, 'SHRI', 'MMBINI', 'RETURN1')
checkR(function (x) return x & 1 end, 9, 1, 'BANDK', 'MMBINK', 'RETURN1')
checkR(function (x) return 10 | x end, 1, 11, 'BORK', 'MMBINK', 'RETURN1')
checkR(function (x) return -10 ~ x end, -1, 9, 'BXORK', 'MMBINK', 'RETURN1')
-- K operands in arithmetic operations
checkR(function (x) return x + 0.0 end, 1, 1.0, 'ADDK', 'MMBINK', 'RETURN1')
-- check(function (x) return 128 + x end, 'ADDK', 'MMBINK', 'RETURN1')
checkR(function (x) return x * -10000 end, 2, -20000,
'MULK', 'MMBINK', 'RETURN1')
-- check(function (x) return 20 * x end, 'MULK', 'MMBINK', 'RETURN1')
checkR(function (x) return x ^ 0.5 end, 4, 2.0, 'POWK', 'MMBINK', 'RETURN1')
checkR(function (x) return x / 2.0 end, 4, 2.0, 'DIVK', 'MMBINK', 'RETURN1')
checkR(function (x) return x // 10000 end, 10000, 1,
'IDIVK', 'MMBINK', 'RETURN1')
checkR(function (x) return x % (100.0 - 10) end, 91, 1.0,
'MODK', 'MMBINK', 'RETURN1')
-- no foldings (and immediate operands)
check(function () return -0.0 end, 'LOADF', 'UNM', 'RETURN1')
check(function () return k3/0 end, 'LOADI', 'DIVK', 'MMBINK', 'RETURN1')
check(function () return 0%0 end, 'LOADI', 'MODK', 'MMBINK', 'RETURN1')
check(function () return -4//0 end, 'LOADI', 'IDIVK', 'MMBINK', 'RETURN1')
check(function (x) return x >> 2.0 end, 'LOADF', 'SHR', 'MMBIN', 'RETURN1')
check(function (x) return x << 128 end, 'LOADI', 'SHL', 'MMBIN', 'RETURN1')
check(function (x) return x & 2.0 end, 'LOADF', 'BAND', 'MMBIN', 'RETURN1')
-- basic 'for' loops
check(function () for i = -10, 10.5 do end end,
'LOADI', 'LOADK', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
check(function () for i = 0xfffffff, 10.0, 1 do end end,
'LOADK', 'LOADF', 'LOADI', 'FORPREP', 'FORLOOP', 'RETURN0')
-- bug in constant folding for 5.1
check(function () return -nil end, 'LOADNIL', 'UNM', 'RETURN1')
check(function ()
local a,b,c
b[c], a = c, b
b[a], a = c, b
a, b = c, a
a = a
end,
'LOADNIL',
'MOVE', 'MOVE', 'SETTABLE',
'MOVE', 'MOVE', 'MOVE', 'SETTABLE',
'MOVE', 'MOVE', 'MOVE',
-- no code for a = a
'RETURN0')
-- x == nil , x ~= nil
-- checkequal(function (b) if (a==nil) then a=1 end; if a~=nil then a=1 end end,
-- function () if (a==9) then a=1 end; if a~=9 then a=1 end end)
-- check(function () if a==nil then a='a' end end,
-- 'GETTABUP', 'EQ', 'JMP', 'SETTABUP', 'RETURN')
do -- tests for table access in upvalues
local t
check(function () t[kx] = t.y end, 'GETTABUP', 'SETTABUP')
check(function (a) t[a()] = t[a()] end,
'MOVE', 'CALL', 'GETUPVAL', 'MOVE', 'CALL',
'GETUPVAL', 'GETTABLE', 'SETTABLE')
end
-- de morgan
checkequal(function () local a; if not (a or b) then b=a end end,
function () local a; if (not a and not b) then b=a end end)
checkequal(function (l) local a; return 0 <= a and a <= l end,
function (l) local a; return not (not(a >= 0) or not(a <= l)) end)
-- if-break optimizations
check(function (a, b)
while a do
if b then break else a = a + 1 end
end
end,
'TEST', 'JMP', 'TEST', 'JMP', 'ADDI', 'MMBINI', 'JMP', 'RETURN0')
checkequal(function () return 6 or true or nil end,
function () return k6 or kTrue or kNil end)
checkequal(function () return 6 and true or nil end,
function () return k6 and kTrue or kNil end)
do -- string constants
local k0 <const> = "00000000000000000000000000000000000000000000000000"
local function f1 ()
local k <const> = k0
return function ()
return function () return k end
end
end
local f2 = f1()
local f3 = f2()
assert(f3() == k0)
checkK(f3, k0)
-- string is not needed by other functions
assert(T.listk(f1)[1] == nil)
assert(T.listk(f2)[1] == nil)
end
print 'OK'

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-- $Id: testes/constructs.lua $
-- See Copyright Notice in file all.lua
;;print "testing syntax";;
local debug = require "debug"
local function checkload (s, msg)
assert(string.find(select(2, load(s)), msg))
end
-- testing semicollons
local a
do ;;; end
; do ; a = 3; assert(a == 3) end;
;
-- invalid operations should not raise errors when not executed
if false then a = 3 // 0; a = 0 % 0 end
-- testing priorities
assert(2^3^2 == 2^(3^2));
assert(2^3*4 == (2^3)*4);
assert(2.0^-2 == 1/4 and -2^- -2 == - - -4);
assert(not nil and 2 and not(2>3 or 3<2));
assert(-3-1-5 == 0+0-9);
assert(-2^2 == -4 and (-2)^2 == 4 and 2*2-3-1 == 0);
assert(-3%5 == 2 and -3+5 == 2)
assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
assert(not(2+1 > 3*1) and "a".."b" > "a");
assert(0xF0 | 0xCC ~ 0xAA & 0xFD == 0xF4)
assert(0xFD & 0xAA ~ 0xCC | 0xF0 == 0xF4)
assert(0xF0 & 0x0F + 1 == 0x10)
assert(3^4//2^3//5 == 2)
assert(-3+4*5//2^3^2//9+4%10/3 == (-3)+(((4*5)//(2^(3^2)))//9)+((4%10)/3))
assert(not ((true or false) and nil))
assert( true or false and nil)
-- old bug
assert((((1 or false) and true) or false) == true)
assert((((nil and true) or false) and true) == false)
local a,b = 1,nil;
assert(-(1 or 2) == -1 and (1 and 2)+(-1.25 or -4) == 0.75);
local x = ((b or a)+1 == 2 and (10 or a)+1 == 11); assert(x);
x = (((2<3) or 1) == true and (2<3 and 4) == 4); assert(x);
local x, y = 1, 2;
assert((x>y) and x or y == 2);
x,y=2,1;
assert((x>y) and x or y == 2);
assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
do -- testing operators with diffent kinds of constants
-- operands to consider:
-- * fit in register
-- * constant doesn't fit in register
-- * floats with integral values
local operand = {3, 100, 5.0, -10, -5.0, 10000, -10000}
local operator = {"+", "-", "*", "/", "//", "%", "^",
"&", "|", "^", "<<", ">>",
"==", "~=", "<", ">", "<=", ">=",}
for _, op in ipairs(operator) do
local f = assert(load(string.format([[return function (x,y)
return x %s y
end]], op)))();
for _, o1 in ipairs(operand) do
for _, o2 in ipairs(operand) do
local gab = f(o1, o2)
_ENV.XX = o1
local code = string.format("return XX %s %s", op, o2)
local res = assert(load(code))()
assert(res == gab)
_ENV.XX = o2
code = string.format("return (%s) %s XX", o1, op)
res = assert(load(code))()
assert(res == gab)
code = string.format("return (%s) %s %s", o1, op, o2)
res = assert(load(code))()
assert(res == gab)
end
end
end
_ENV.XX = nil
end
-- silly loops
repeat until 1; repeat until true;
while false do end; while nil do end;
do -- test old bug (first name could not be an `upvalue')
local a; local function f(x) x={a=1}; x={x=1}; x={G=1} end
end
do -- bug since 5.4.0
-- create code with a table using more than 256 constants
local code = {"local x = {"}
for i = 1, 257 do
code[#code + 1] = i .. ".1,"
end
code[#code + 1] = "};"
code = table.concat(code)
-- add "ret" to the end of that code and checks that
-- it produces the expected value "val"
local function check (ret, val)
local code = code .. ret
code = load(code)
assert(code() == val)
end
check("return (1 ~ (2 or 3))", 1 ~ 2)
check("return (1 | (2 or 3))", 1 | 2)
check("return (1 + (2 or 3))", 1 + 2)
check("return (1 << (2 or 3))", 1 << 2)
end
local function f (i)
if type(i) ~= 'number' then return i,'jojo'; end;
if i > 0 then return i, f(i-1); end;
end
x = {f(3), f(5), f(10);};
assert(x[1] == 3 and x[2] == 5 and x[3] == 10 and x[4] == 9 and x[12] == 1);
assert(x[nil] == nil)
x = {f'alo', f'xixi', nil};
assert(x[1] == 'alo' and x[2] == 'xixi' and x[3] == nil);
x = {f'alo'..'xixi'};
assert(x[1] == 'aloxixi')
x = {f{}}
assert(x[2] == 'jojo' and type(x[1]) == 'table')
local f = function (i)
if i < 10 then return 'a';
elseif i < 20 then return 'b';
elseif i < 30 then return 'c';
end;
end
assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == nil)
for i=1,1000 do break; end;
local n=100;
local i=3;
local t = {};
local a=nil
while not a do
a=0; for i=1,n do for i=i,1,-1 do a=a+1; t[i]=1; end; end;
end
assert(a == n*(n+1)/2 and i==3);
assert(t[1] and t[n] and not t[0] and not t[n+1])
function f(b)
local x = 1;
repeat
local a;
if b==1 then local b=1; x=10; break
elseif b==2 then x=20; break;
elseif b==3 then x=30;
else local a,b,c,d=math.sin(1); x=x+1;
end
until x>=12;
return x;
end;
assert(f(1) == 10 and f(2) == 20 and f(3) == 30 and f(4)==12)
local f = function (i)
if i < 10 then return 'a'
elseif i < 20 then return 'b'
elseif i < 30 then return 'c'
else return 8
end
end
assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == 8)
local a, b = nil, 23
x = {f(100)*2+3 or a, a or b+2}
assert(x[1] == 19 and x[2] == 25)
x = {f=2+3 or a, a = b+2}
assert(x.f == 5 and x.a == 25)
a={y=1}
x = {a.y}
assert(x[1] == 1)
local function f (i)
while 1 do
if i>0 then i=i-1;
else return; end;
end;
end;
local function g(i)
while 1 do
if i>0 then i=i-1
else return end
end
end
f(10); g(10);
do
function f () return 1,2,3; end
local a, b, c = f();
assert(a==1 and b==2 and c==3)
a, b, c = (f());
assert(a==1 and b==nil and c==nil)
end
local a,b = 3 and f();
assert(a==1 and b==nil)
function g() f(); return; end;
assert(g() == nil)
function g() return nil or f() end
a,b = g()
assert(a==1 and b==nil)
print'+';
do -- testing constants
local prog <const> = [[local x <XXX> = 10]]
checkload(prog, "unknown attribute 'XXX'")
checkload([[local xxx <const> = 20; xxx = 10]],
":1: attempt to assign to const variable 'xxx'")
checkload([[
local xx;
local xxx <const> = 20;
local yyy;
local function foo ()
local abc = xx + yyy + xxx;
return function () return function () xxx = yyy end end
end
]], ":6: attempt to assign to const variable 'xxx'")
checkload([[
local x <close> = nil
x = io.open()
]], ":2: attempt to assign to const variable 'x'")
end
f = [[
return function ( a , b , c , d , e )
local x = a >= b or c or ( d and e ) or nil
return x
end , { a = 1 , b = 2 >= 1 , } or { 1 };
]]
f = string.gsub(f, "%s+", "\n"); -- force a SETLINE between opcodes
f,a = load(f)();
assert(a.a == 1 and a.b)
function g (a,b,c,d,e)
if not (a>=b or c or d and e or nil) then return 0; else return 1; end;
end
local function h (a,b,c,d,e)
while (a>=b or c or (d and e) or nil) do return 1; end;
return 0;
end;
assert(f(2,1) == true and g(2,1) == 1 and h(2,1) == 1)
assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
assert(f(1,2,'a')
~= -- force SETLINE before nil
nil, "")
assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
assert(f(1,2,nil,1,'x') == 'x' and g(1,2,nil,1,'x') == 1 and
h(1,2,nil,1,'x') == 1)
assert(f(1,2,nil,nil,'x') == nil and g(1,2,nil,nil,'x') == 0 and
h(1,2,nil,nil,'x') == 0)
assert(f(1,2,nil,1,nil) == nil and g(1,2,nil,1,nil) == 0 and
h(1,2,nil,1,nil) == 0)
assert(1 and 2<3 == true and 2<3 and 'a'<'b' == true)
x = 2<3 and not 3; assert(x==false)
x = 2<1 or (2>1 and 'a'); assert(x=='a')
do
local a; if nil then a=1; else a=2; end; -- this nil comes as PUSHNIL 2
assert(a==2)
end
local function F (a)
assert(debug.getinfo(1, "n").name == 'F')
return a,2,3
end
a,b = F(1)~=nil; assert(a == true and b == nil);
a,b = F(nil)==nil; assert(a == true and b == nil)
----------------------------------------------------------------
------------------------------------------------------------------
-- sometimes will be 0, sometimes will not...
_ENV.GLOB1 = math.random(0, 1)
-- basic expressions with their respective values
local basiccases = {
{"nil", nil},
{"false", false},
{"true", true},
{"10", 10},
{"(0==_ENV.GLOB1)", 0 == _ENV.GLOB1},
}
local prog
if _ENV.GLOB1 == 0 then
basiccases[2][1] = "F" -- constant false
prog = [[
local F <const> = false
if %s then IX = true end
return %s
]]
else
basiccases[4][1] = "k10" -- constant 10
prog = [[
local k10 <const> = 10
if %s then IX = true end
return %s
]]
end
print('testing short-circuit optimizations (' .. _ENV.GLOB1 .. ')')
-- operators with their respective values
local binops <const> = {
{" and ", function (a,b) if not a then return a else return b end end},
{" or ", function (a,b) if a then return a else return b end end},
}
local cases <const> = {}
-- creates all combinations of '(cases[i] op cases[n-i])' plus
-- 'not(cases[i] op cases[n-i])' (syntax + value)
local function createcases (n)
local res = {}
for i = 1, n - 1 do
for _, v1 in ipairs(cases[i]) do
for _, v2 in ipairs(cases[n - i]) do
for _, op in ipairs(binops) do
local t = {
"(" .. v1[1] .. op[1] .. v2[1] .. ")",
op[2](v1[2], v2[2])
}
res[#res + 1] = t
res[#res + 1] = {"not" .. t[1], not t[2]}
end
end
end
end
return res
end
-- do not do too many combinations for soft tests
local level = _soft and 3 or 4
cases[1] = basiccases
for i = 2, level do cases[i] = createcases(i) end
print("+")
local i = 0
for n = 1, level do
for _, v in pairs(cases[n]) do
local s = v[1]
local p = load(string.format(prog, s, s), "")
IX = false
assert(p() == v[2] and IX == not not v[2])
i = i + 1
if i % 60000 == 0 then print('+') end
end
end
IX = nil
_G.GLOB1 = nil
------------------------------------------------------------------
-- testing some syntax errors (chosen through 'gcov')
checkload("for x do", "expected")
checkload("x:call", "expected")
print'OK'

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-- $Id: testes/cstack.lua $
-- See Copyright Notice in file all.lua
local tracegc = require"tracegc"
print"testing stack overflow detection"
-- Segmentation faults in these tests probably result from a C-stack
-- overflow. To avoid these errors, you should set a smaller limit for
-- the use of C stack by Lua, by changing the constant 'LUAI_MAXCCALLS'.
-- Alternatively, you can ensure a larger stack for the program.
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
do print("testing stack overflow in message handling")
local count = 0
local function loop (x, y, z)
count = count + 1
return 1 + loop(x, y, z)
end
tracegc.stop() -- __gc should not be called with a full stack
local res, msg = xpcall(loop, loop)
tracegc.start()
assert(msg == "error in error handling")
print("final count: ", count)
end
-- bug since 2.5 (C-stack overflow in recursion inside pattern matching)
do print("testing recursion inside pattern matching")
local function f (size)
local s = string.rep("a", size)
local p = string.rep(".?", size)
return string.match(s, p)
end
local m = f(80)
assert(#m == 80)
checkerror("too complex", f, 2000)
end
do print("testing stack-overflow in recursive 'gsub'")
local count = 0
local function foo ()
count = count + 1
string.gsub("a", ".", foo)
end
checkerror("stack overflow", foo)
print("final count: ", count)
print("testing stack-overflow in recursive 'gsub' with metatables")
local count = 0
local t = setmetatable({}, {__index = foo})
foo = function ()
count = count + 1
string.gsub("a", ".", t)
end
checkerror("stack overflow", foo)
print("final count: ", count)
end
do -- bug in 5.4.0
print("testing limits in coroutines inside deep calls")
local count = 0
local lim = 1000
local function stack (n)
if n > 0 then return stack(n - 1) + 1
else coroutine.wrap(function ()
count = count + 1
stack(lim)
end)()
end
end
local st, msg = xpcall(stack, function () return "ok" end, lim)
assert(not st and msg == "ok")
print("final count: ", count)
end
do -- bug since 5.4.0
local count = 0
print("chain of 'coroutine.close'")
-- create N coroutines forming a list so that each one, when closed,
-- closes the previous one. (With a large enough N, previous Lua
-- versions crash in this test.)
local coro = false
for i = 1, 1000 do
local previous = coro
coro = coroutine.create(function()
local cc <close> = setmetatable({}, {__close=function()
count = count + 1
if previous then
assert(coroutine.close(previous))
end
end})
coroutine.yield() -- leaves 'cc' pending to be closed
end)
assert(coroutine.resume(coro)) -- start it and run until it yields
end
local st, msg = coroutine.close(coro)
assert(not st and string.find(msg, "C stack overflow"))
print("final count: ", count)
end
do
print("nesting of resuming yielded coroutines")
local count = 0
local function body ()
coroutine.yield()
local f = coroutine.wrap(body)
f(); -- start new coroutine (will stop in previous yield)
count = count + 1
f() -- call it recursively
end
local f = coroutine.wrap(body)
f()
assert(not pcall(f))
print("final count: ", count)
end
do -- bug in 5.4.2
print("nesting coroutines running after recoverable errors")
local count = 0
local function foo()
count = count + 1
pcall(1) -- create an error
-- running now inside 'precover' ("protected recover")
coroutine.wrap(foo)() -- call another coroutine
end
checkerror("C stack overflow", foo)
print("final count: ", count)
end
if T then
print("testing stack recovery")
local N = 0 -- trace number of calls
local LIM = -1 -- will store N just before stack overflow
-- trace stack size; after stack overflow, it should be
-- the maximum allowed stack size.
local stack1
local dummy
local function err(msg)
assert(string.find(msg, "stack overflow"))
local _, stacknow = T.stacklevel()
assert(stacknow == stack1 + 200)
end
-- When LIM==-1, the 'if' is not executed, so this function only
-- counts and stores the stack limits up to overflow. Then, LIM
-- becomes N, and then the 'if' code is run when the stack is
-- full. Then, there is a stack overflow inside 'xpcall', after which
-- the stack must have been restored back to its maximum normal size.
local function f()
dummy, stack1 = T.stacklevel()
if N == LIM then
xpcall(f, err)
local _, stacknow = T.stacklevel()
assert(stacknow == stack1)
return
end
N = N + 1
f()
end
local topB, sizeB -- top and size Before overflow
local topA, sizeA -- top and size After overflow
topB, sizeB = T.stacklevel()
tracegc.stop() -- __gc should not be called with a full stack
xpcall(f, err)
tracegc.start()
topA, sizeA = T.stacklevel()
-- sizes should be comparable
assert(topA == topB and sizeA < sizeB * 2)
print(string.format("maximum stack size: %d", stack1))
LIM = N -- will stop recursion at maximum level
N = 0 -- to count again
tracegc.stop() -- __gc should not be called with a full stack
f()
tracegc.start()
print"+"
end
print'OK'

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-- $Id: testes/errors.lua $
-- See Copyright Notice in file all.lua
print("testing errors")
local debug = require"debug"
-- avoid problems with 'strict' module (which may generate other error messages)
local mt = getmetatable(_G) or {}
local oldmm = mt.__index
mt.__index = nil
local function checkerr (msg, f, ...)
local st, err = pcall(f, ...)
assert(not st and string.find(err, msg))
end
local function doit (s)
local f, msg = load(s)
if not f then return msg end
local cond, msg = pcall(f)
return (not cond) and msg
end
local function checkmessage (prog, msg, debug)
local m = doit(prog)
if debug then print(m, msg) end
assert(string.find(m, msg, 1, true))
end
local function checksyntax (prog, extra, token, line)
local msg = doit(prog)
if not string.find(token, "^<%a") and not string.find(token, "^char%(")
then token = "'"..token.."'" end
token = string.gsub(token, "(%p)", "%%%1")
local pt = string.format([[^%%[string ".*"%%]:%d: .- near %s$]],
line, token)
assert(string.find(msg, pt))
assert(string.find(msg, msg, 1, true))
end
-- test error message with no extra info
assert(doit("error('hi', 0)") == 'hi')
-- test error message with no info
assert(doit("error()") == nil)
-- test common errors/errors that crashed in the past
assert(doit("table.unpack({}, 1, n=2^30)"))
assert(doit("a=math.sin()"))
assert(not doit("tostring(1)") and doit("tostring()"))
assert(doit"tonumber()")
assert(doit"repeat until 1; a")
assert(doit"return;;")
assert(doit"assert(false)")
assert(doit"assert(nil)")
assert(doit("function a (... , ...) end"))
assert(doit("function a (, ...) end"))
assert(doit("local t={}; t = t[#t] + 1"))
checksyntax([[
local a = {4
]], "'}' expected (to close '{' at line 1)", "<eof>", 3)
do -- testing errors in goto/break
local function checksyntax (prog, msg, line)
local st, err = load(prog)
assert(string.find(err, "line " .. line))
assert(string.find(err, msg, 1, true))
end
checksyntax([[
::A:: a = 1
::A::
]], "label 'A' already defined", 1)
checksyntax([[
a = 1
goto A
do ::A:: end
]], "no visible label 'A'", 2)
end
if not T then
(Message or print)
('\n >>> testC not active: skipping tests for messages in C <<<\n')
else
print "testing memory error message"
local a = {}
for i = 1, 10000 do a[i] = true end -- preallocate array
collectgarbage()
T.totalmem(T.totalmem() + 10000)
-- force a memory error (by a small margin)
local st, msg = pcall(function()
for i = 1, 100000 do a[i] = tostring(i) end
end)
T.totalmem(0)
assert(not st and msg == "not enough" .. " memory")
-- stack space for luaL_traceback (bug in 5.4.6)
local res = T.testC[[
# push 16 elements on the stack
pushnum 1; pushnum 1; pushnum 1; pushnum 1; pushnum 1;
pushnum 1; pushnum 1; pushnum 1; pushnum 1; pushnum 1;
pushnum 1; pushnum 1; pushnum 1; pushnum 1; pushnum 1;
pushnum 1;
# traceback should work with 4 remaining slots
traceback xuxu 1;
return 1
]]
assert(string.find(res, "xuxu.-main chunk"))
end
-- tests for better error messages
checkmessage("a = {} + 1", "arithmetic")
checkmessage("a = {} | 1", "bitwise operation")
checkmessage("a = {} < 1", "attempt to compare")
checkmessage("a = {} <= 1", "attempt to compare")
checkmessage("aaa=1; bbbb=2; aaa=math.sin(3)+bbbb(3)", "global 'bbbb'")
checkmessage("aaa={}; do local aaa=1 end aaa:bbbb(3)", "method 'bbbb'")
checkmessage("local a={}; a.bbbb(3)", "field 'bbbb'")
assert(not string.find(doit"aaa={13}; local bbbb=1; aaa[bbbb](3)", "'bbbb'"))
checkmessage("aaa={13}; local bbbb=1; aaa[bbbb](3)", "number")
checkmessage("aaa=(1)..{}", "a table value")
-- bug in 5.4.6
checkmessage("a = {_ENV = {}}; print(a._ENV.x + 1)", "field 'x'")
_G.aaa, _G.bbbb = nil
-- calls
checkmessage("local a; a(13)", "local 'a'")
checkmessage([[
local a = setmetatable({}, {__add = 34})
a = a + 1
]], "metamethod 'add'")
checkmessage([[
local a = setmetatable({}, {__lt = {}})
a = a > a
]], "metamethod 'lt'")
-- tail calls
checkmessage("local a={}; return a.bbbb(3)", "field 'bbbb'")
checkmessage("aaa={}; do local aaa=1 end; return aaa:bbbb(3)", "method 'bbbb'")
checkmessage("aaa = #print", "length of a function value")
checkmessage("aaa = #3", "length of a number value")
_G.aaa = nil
checkmessage("aaa.bbb:ddd(9)", "global 'aaa'")
checkmessage("local aaa={bbb=1}; aaa.bbb:ddd(9)", "field 'bbb'")
checkmessage("local aaa={bbb={}}; aaa.bbb:ddd(9)", "method 'ddd'")
checkmessage("local a,b,c; (function () a = b+1.1 end)()", "upvalue 'b'")
assert(not doit"local aaa={bbb={ddd=next}}; aaa.bbb:ddd(nil)")
-- upvalues being indexed do not go to the stack
checkmessage("local a,b,cc; (function () a = cc[1] end)()", "upvalue 'cc'")
checkmessage("local a,b,cc; (function () a.x = 1 end)()", "upvalue 'a'")
checkmessage("local _ENV = {x={}}; a = a + 1", "global 'a'")
checkmessage("BB=1; local aaa={}; x=aaa+BB", "local 'aaa'")
checkmessage("aaa={}; x=3.3/aaa", "global 'aaa'")
checkmessage("aaa=2; BB=nil;x=aaa*BB", "global 'BB'")
checkmessage("aaa={}; x=-aaa", "global 'aaa'")
-- short circuit
checkmessage("aaa=1; local aaa,bbbb=2,3; aaa = math.sin(1) and bbbb(3)",
"local 'bbbb'")
checkmessage("aaa=1; local aaa,bbbb=2,3; aaa = bbbb(1) or aaa(3)",
"local 'bbbb'")
checkmessage("local a,b,c,f = 1,1,1; f((a and b) or c)", "local 'f'")
checkmessage("local a,b,c = 1,1,1; ((a and b) or c)()", "call a number value")
assert(not string.find(doit"aaa={}; x=(aaa or aaa)+(aaa and aaa)", "'aaa'"))
assert(not string.find(doit"aaa={}; (aaa or aaa)()", "'aaa'"))
checkmessage("print(print < 10)", "function with number")
checkmessage("print(print < print)", "two function values")
checkmessage("print('10' < 10)", "string with number")
checkmessage("print(10 < '23')", "number with string")
-- float->integer conversions
checkmessage("local a = 2.0^100; x = a << 2", "local a")
checkmessage("local a = 1 >> 2.0^100", "has no integer representation")
checkmessage("local a = 10.1 << 2.0^100", "has no integer representation")
checkmessage("local a = 2.0^100 & 1", "has no integer representation")
checkmessage("local a = 2.0^100 & 1e100", "has no integer representation")
checkmessage("local a = 2.0 | 1e40", "has no integer representation")
checkmessage("local a = 2e100 ~ 1", "has no integer representation")
checkmessage("string.sub('a', 2.0^100)", "has no integer representation")
checkmessage("string.rep('a', 3.3)", "has no integer representation")
checkmessage("return 6e40 & 7", "has no integer representation")
checkmessage("return 34 << 7e30", "has no integer representation")
checkmessage("return ~-3e40", "has no integer representation")
checkmessage("return ~-3.009", "has no integer representation")
checkmessage("return 3.009 & 1", "has no integer representation")
checkmessage("return 34 >> {}", "table value")
checkmessage("aaa = 24 // 0", "divide by zero")
checkmessage("aaa = 1 % 0", "'n%0'")
-- type error for an object which is neither in an upvalue nor a register.
-- The following code will try to index the value 10 that is stored in
-- the metatable, without moving it to a register.
checkmessage("local a = setmetatable({}, {__index = 10}).x",
"attempt to index a number value")
-- numeric for loops
checkmessage("for i = {}, 10 do end", "table")
checkmessage("for i = io.stdin, 10 do end", "FILE")
checkmessage("for i = {}, 10 do end", "initial value")
checkmessage("for i = 1, 'x', 10 do end", "string")
checkmessage("for i = 1, {}, 10 do end", "limit")
checkmessage("for i = 1, {} do end", "limit")
checkmessage("for i = 1, 10, print do end", "step")
checkmessage("for i = 1, 10, print do end", "function")
-- passing light userdata instead of full userdata
_G.D = debug
checkmessage([[
-- create light udata
local x = D.upvalueid(function () return debug end, 1)
D.setuservalue(x, {})
]], "light userdata")
_G.D = nil
do -- named objects (field '__name')
checkmessage("math.sin(io.input())", "(number expected, got FILE*)")
_G.XX = setmetatable({}, {__name = "My Type"})
assert(string.find(tostring(XX), "^My Type"))
checkmessage("io.input(XX)", "(FILE* expected, got My Type)")
checkmessage("return XX + 1", "on a My Type value")
checkmessage("return ~io.stdin", "on a FILE* value")
checkmessage("return XX < XX", "two My Type values")
checkmessage("return {} < XX", "table with My Type")
checkmessage("return XX < io.stdin", "My Type with FILE*")
_G.XX = nil
if T then -- extra tests for 'luaL_tolstring'
-- bug in 5.4.3; 'luaL_tolstring' with negative indices
local x = setmetatable({}, {__name="TABLE"})
assert(T.testC("Ltolstring -1; return 1", x) == tostring(x))
local a, b = T.testC("pushint 10; Ltolstring -2; return 2", x)
assert(a == 10 and b == tostring(x))
setmetatable(x, {__tostring=function (o)
assert(o == x)
return "ABC"
end})
local a, b, c = T.testC("pushint 10; Ltolstring -2; return 3", x)
assert(a == x and b == 10 and c == "ABC")
end
end
-- global functions
checkmessage("(io.write or print){}", "io.write")
checkmessage("(collectgarbage or print){}", "collectgarbage")
-- errors in functions without debug info
do
local f = function (a) return a + 1 end
f = assert(load(string.dump(f, true)))
assert(f(3) == 4)
checkerr("^%?:%-1:", f, {})
-- code with a move to a local var ('OP_MOV A B' with A<B)
f = function () local a; a = {}; return a + 2 end
-- no debug info (so that 'a' is unknown)
f = assert(load(string.dump(f, true)))
-- symbolic execution should not get lost
checkerr("^%?:%-1:.*table value", f)
end
-- tests for field accesses after RK limit
local t = {}
for i = 1, 1000 do
t[i] = "aaa = x" .. i
end
local s = table.concat(t, "; ")
t = nil
checkmessage(s.."; aaa = bbb + 1", "global 'bbb'")
checkmessage("local _ENV=_ENV;"..s.."; aaa = bbb + 1", "global 'bbb'")
checkmessage(s.."; local t = {}; aaa = t.bbb + 1", "field 'bbb'")
checkmessage(s.."; local t = {}; t:bbb()", "method 'bbb'")
checkmessage([[aaa=9
repeat until 3==3
local x=math.sin(math.cos(3))
if math.sin(1) == x then return math.sin(1) end -- tail call
local a,b = 1, {
{x='a'..'b'..'c', y='b', z=x},
{1,2,3,4,5} or 3+3<=3+3,
3+1>3+1,
{d = x and aaa[x or y]}}
]], "global 'aaa'")
checkmessage([[
local x,y = {},1
if math.sin(1) == 0 then return 3 end -- return
x.a()]], "field 'a'")
checkmessage([[
prefix = nil
insert = nil
while 1 do
local a
if nil then break end
insert(prefix, a)
end]], "global 'insert'")
checkmessage([[ -- tail call
return math.sin("a")
]], "sin")
checkmessage([[collectgarbage("nooption")]], "invalid option")
checkmessage([[x = print .. "a"]], "concatenate")
checkmessage([[x = "a" .. false]], "concatenate")
checkmessage([[x = {} .. 2]], "concatenate")
checkmessage("getmetatable(io.stdin).__gc()", "no value")
checkmessage([[
local Var
local function main()
NoSuchName (function() Var=0 end)
end
main()
]], "global 'NoSuchName'")
print'+'
aaa = {}; setmetatable(aaa, {__index = string})
checkmessage("aaa:sub()", "bad self")
checkmessage("string.sub('a', {})", "#2")
checkmessage("('a'):sub{}", "#1")
checkmessage("table.sort({1,2,3}, table.sort)", "'table.sort'")
checkmessage("string.gsub('s', 's', setmetatable)", "'setmetatable'")
_G.aaa = nil
-- tests for errors in coroutines
local function f (n)
local c = coroutine.create(f)
local a,b = coroutine.resume(c)
return b
end
assert(string.find(f(), "C stack overflow"))
checkmessage("coroutine.yield()", "outside a coroutine")
f = coroutine.wrap(function () table.sort({1,2,3}, coroutine.yield) end)
checkerr("yield across", f)
-- testing size of 'source' info; size of buffer for that info is
-- LUA_IDSIZE, declared as 60 in luaconf. Get one position for '\0'.
local idsize = 60 - 1
local function checksize (source)
-- syntax error
local _, msg = load("x", source)
msg = string.match(msg, "^([^:]*):") -- get source (1st part before ':')
assert(msg:len() <= idsize)
end
for i = 60 - 10, 60 + 10 do -- check border cases around 60
checksize("@" .. string.rep("x", i)) -- file names
checksize(string.rep("x", i - 10)) -- string sources
checksize("=" .. string.rep("x", i)) -- exact sources
end
-- testing line error
local function lineerror (s, l)
local err,msg = pcall(load(s))
local line = tonumber(string.match(msg, ":(%d+):"))
assert(line == l or (not line and not l))
end
lineerror("local a\n for i=1,'a' do \n print(i) \n end", 2)
lineerror("\n local a \n for k,v in 3 \n do \n print(k) \n end", 3)
lineerror("\n\n for k,v in \n 3 \n do \n print(k) \n end", 4)
lineerror("function a.x.y ()\na=a+1\nend", 1)
lineerror("a = \na\n+\n{}", 3)
lineerror("a = \n3\n+\n(\n4\n/\nprint)", 6)
lineerror("a = \nprint\n+\n(\n4\n/\n7)", 3)
lineerror("a\n=\n-\n\nprint\n;", 3)
lineerror([[
a
( -- <<
23)
]], 2)
lineerror([[
local a = {x = 13}
a
.
x
( -- <<
23
)
]], 5)
lineerror([[
local a = {x = 13}
a
.
x
(
23 + a
)
]], 6)
local p = [[
function g() f() end
function f(x) error('a', XX) end
g()
]]
XX=3;lineerror((p), 3)
XX=0;lineerror((p), false)
XX=1;lineerror((p), 2)
XX=2;lineerror((p), 1)
_G.XX, _G.g, _G.f = nil
lineerror([[
local b = false
if not b then
error 'test'
end]], 3)
lineerror([[
local b = false
if not b then
if not b then
if not b then
error 'test'
end
end
end]], 5)
-- bug in 5.4.0
lineerror([[
local a = 0
local b = 1
local c = b % a
]], 3)
do
-- Force a negative estimate for base line. Error in instruction 2
-- (after VARARGPREP, GETGLOBAL), with first absolute line information
-- (forced by too many lines) in instruction 0.
local s = string.format("%s return __A.x", string.rep("\n", 300))
lineerror(s, 301)
end
if not _soft then
-- several tests that exaust the Lua stack
collectgarbage()
print"testing stack overflow"
local C = 0
-- get line where stack overflow will happen
local l = debug.getinfo(1, "l").currentline + 1
local function auxy () C=C+1; auxy() end -- produce a stack overflow
function YY ()
collectgarbage("stop") -- avoid running finalizers without stack space
auxy()
collectgarbage("restart")
end
local function checkstackmessage (m)
print("(expected stack overflow after " .. C .. " calls)")
C = 0 -- prepare next count
return (string.find(m, "stack overflow"))
end
-- repeated stack overflows (to check stack recovery)
assert(checkstackmessage(doit('YY()')))
assert(checkstackmessage(doit('YY()')))
assert(checkstackmessage(doit('YY()')))
_G.YY = nil
-- error lines in stack overflow
local l1
local function g(x)
l1 = debug.getinfo(x, "l").currentline + 2
collectgarbage("stop") -- avoid running finalizers without stack space
auxy()
collectgarbage("restart")
end
local _, stackmsg = xpcall(g, debug.traceback, 1)
print('+')
local stack = {}
for line in string.gmatch(stackmsg, "[^\n]*") do
local curr = string.match(line, ":(%d+):")
if curr then table.insert(stack, tonumber(curr)) end
end
local i=1
while stack[i] ~= l1 do
assert(stack[i] == l)
i = i+1
end
assert(i > 15)
-- error in error handling
local res, msg = xpcall(error, error)
assert(not res and type(msg) == 'string')
print('+')
local function f (x)
if x==0 then error('a\n')
else
local aux = function () return f(x-1) end
local a,b = xpcall(aux, aux)
return a,b
end
end
f(3)
local function loop (x,y,z) return 1 + loop(x, y, z) end
local res, msg = xpcall(loop, function (m)
assert(string.find(m, "stack overflow"))
checkerr("error handling", loop)
assert(math.sin(0) == 0)
return 15
end)
assert(msg == 15)
local f = function ()
for i = 999900, 1000000, 1 do table.unpack({}, 1, i) end
end
checkerr("too many results", f)
end
do
-- non string messages
local t = {}
local res, msg = pcall(function () error(t) end)
assert(not res and msg == t)
res, msg = pcall(function () error(nil) end)
assert(not res and msg == nil)
local function f() error{msg='x'} end
res, msg = xpcall(f, function (r) return {msg=r.msg..'y'} end)
assert(msg.msg == 'xy')
-- 'assert' with extra arguments
res, msg = pcall(assert, false, "X", t)
assert(not res and msg == "X")
-- 'assert' with no message
res, msg = pcall(function () assert(false) end)
local line = string.match(msg, "%w+%.lua:(%d+): assertion failed!$")
assert(tonumber(line) == debug.getinfo(1, "l").currentline - 2)
-- 'assert' with non-string messages
res, msg = pcall(assert, false, t)
assert(not res and msg == t)
res, msg = pcall(assert, nil, nil)
assert(not res and msg == nil)
-- 'assert' without arguments
res, msg = pcall(assert)
assert(not res and string.find(msg, "value expected"))
end
-- xpcall with arguments
local a, b, c = xpcall(string.find, error, "alo", "al")
assert(a and b == 1 and c == 2)
a, b, c = xpcall(string.find, function (x) return {} end, true, "al")
assert(not a and type(b) == "table" and c == nil)
print("testing tokens in error messages")
checksyntax("syntax error", "", "error", 1)
checksyntax("1.000", "", "1.000", 1)
checksyntax("[[a]]", "", "[[a]]", 1)
checksyntax("'aa'", "", "'aa'", 1)
checksyntax("while << do end", "", "<<", 1)
checksyntax("for >> do end", "", ">>", 1)
-- test invalid non-printable char in a chunk
checksyntax("a\1a = 1", "", "<\\1>", 1)
-- test 255 as first char in a chunk
checksyntax("\255a = 1", "", "<\\255>", 1)
doit('I = load("a=9+"); aaa=3')
assert(_G.aaa==3 and not _G.I)
_G.I,_G.aaa = nil
print('+')
local lim = 1000
if _soft then lim = 100 end
for i=1,lim do
doit('a = ')
doit('a = 4+nil')
end
-- testing syntax limits
local function testrep (init, rep, close, repc, finalresult)
local s = init .. string.rep(rep, 100) .. close .. string.rep(repc, 100)
local res, msg = load(s)
assert(res) -- 100 levels is OK
if (finalresult) then
assert(res() == finalresult)
end
s = init .. string.rep(rep, 500)
local res, msg = load(s) -- 500 levels not ok
assert(not res and (string.find(msg, "too many") or
string.find(msg, "overflow")))
end
testrep("local a; a", ",a", "= 1", ",1") -- multiple assignment
testrep("local a; a=", "{", "0", "}")
testrep("return ", "(", "2", ")", 2)
testrep("local function a (x) return x end; return ", "a(", "2.2", ")", 2.2)
testrep("", "do ", "", " end")
testrep("", "while a do ", "", " end")
testrep("local a; ", "if a then else ", "", " end")
testrep("", "function foo () ", "", " end")
testrep("local a = ''; return ", "a..", "'a'", "", "a")
testrep("local a = 1; return ", "a^", "a", "", 1)
checkmessage("a = f(x" .. string.rep(",x", 260) .. ")", "too many registers")
-- testing other limits
-- upvalues
local lim = 127
local s = "local function fooA ()\n local "
for j = 1,lim do
s = s.."a"..j..", "
end
s = s.."b,c\n"
s = s.."local function fooB ()\n local "
for j = 1,lim do
s = s.."b"..j..", "
end
s = s.."b\n"
s = s.."function fooC () return b+c"
local c = 1+2
for j = 1,lim do
s = s.."+a"..j.."+b"..j
c = c + 2
end
s = s.."\nend end end"
local a,b = load(s)
assert(c > 255 and string.find(b, "too many upvalues") and
string.find(b, "line 5"))
-- local variables
s = "\nfunction foo ()\n local "
for j = 1,300 do
s = s.."a"..j..", "
end
s = s.."b\n"
local a,b = load(s)
assert(string.find(b, "line 2") and string.find(b, "too many local variables"))
mt.__index = oldmm
print('OK')

491
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-- $Id: testes/events.lua $
-- See Copyright Notice in file all.lua
print('testing metatables')
local debug = require'debug'
X = 20; B = 30
_ENV = setmetatable({}, {__index=_G})
collectgarbage()
X = X+10
assert(X == 30 and _G.X == 20)
B = false
assert(B == false)
_ENV["B"] = undef
assert(B == 30)
assert(getmetatable{} == nil)
assert(getmetatable(4) == nil)
assert(getmetatable(nil) == nil)
a={name = "NAME"}; setmetatable(a, {__metatable = "xuxu",
__tostring=function(x) return x.name end})
assert(getmetatable(a) == "xuxu")
assert(tostring(a) == "NAME")
-- cannot change a protected metatable
assert(pcall(setmetatable, a, {}) == false)
a.name = "gororoba"
assert(tostring(a) == "gororoba")
local a, t = {10,20,30; x="10", y="20"}, {}
assert(setmetatable(a,t) == a)
assert(getmetatable(a) == t)
assert(setmetatable(a,nil) == a)
assert(getmetatable(a) == nil)
assert(setmetatable(a,t) == a)
function f (t, i, e)
assert(not e)
local p = rawget(t, "parent")
return (p and p[i]+3), "dummy return"
end
t.__index = f
a.parent = {z=25, x=12, [4] = 24}
assert(a[1] == 10 and a.z == 28 and a[4] == 27 and a.x == "10")
collectgarbage()
a = setmetatable({}, t)
function f(t, i, v) rawset(t, i, v-3) end
setmetatable(t, t) -- causes a bug in 5.1 !
t.__newindex = f
a[1] = 30; a.x = "101"; a[5] = 200
assert(a[1] == 27 and a.x == 98 and a[5] == 197)
do -- bug in Lua 5.3.2
local mt = {}
mt.__newindex = mt
local t = setmetatable({}, mt)
t[1] = 10 -- will segfault on some machines
assert(mt[1] == 10)
end
local c = {}
a = setmetatable({}, t)
t.__newindex = c
t.__index = c
a[1] = 10; a[2] = 20; a[3] = 90;
for i = 4, 20 do a[i] = i * 10 end
assert(a[1] == 10 and a[2] == 20 and a[3] == 90)
for i = 4, 20 do assert(a[i] == i * 10) end
assert(next(a) == nil)
do
local a;
a = setmetatable({}, {__index = setmetatable({},
{__index = setmetatable({},
{__index = function (_,n) return a[n-3]+4, "lixo" end})})})
a[0] = 20
for i=0,10 do
assert(a[i*3] == 20 + i*4)
end
end
do -- newindex
local foi
local a = {}
for i=1,10 do a[i] = 0; a['a'..i] = 0; end
setmetatable(a, {__newindex = function (t,k,v) foi=true; rawset(t,k,v) end})
foi = false; a[1]=0; assert(not foi)
foi = false; a['a1']=0; assert(not foi)
foi = false; a['a11']=0; assert(foi)
foi = false; a[11]=0; assert(foi)
foi = false; a[1]=undef; assert(not foi)
a[1] = undef
foi = false; a[1]=nil; assert(foi)
end
setmetatable(t, nil)
function f (t, ...) return t, {...} end
t.__call = f
do
local x,y = a(table.unpack{'a', 1})
assert(x==a and y[1]=='a' and y[2]==1 and y[3]==undef)
x,y = a()
assert(x==a and y[1]==undef)
end
local b = setmetatable({}, t)
setmetatable(b,t)
function f(op)
return function (...) cap = {[0] = op, ...} ; return (...) end
end
t.__add = f("add")
t.__sub = f("sub")
t.__mul = f("mul")
t.__div = f("div")
t.__idiv = f("idiv")
t.__mod = f("mod")
t.__unm = f("unm")
t.__pow = f("pow")
t.__len = f("len")
t.__band = f("band")
t.__bor = f("bor")
t.__bxor = f("bxor")
t.__shl = f("shl")
t.__shr = f("shr")
t.__bnot = f("bnot")
t.__lt = f("lt")
t.__le = f("le")
local function checkcap (t)
assert(#cap + 1 == #t)
for i = 1, #t do
assert(cap[i - 1] == t[i])
assert(math.type(cap[i - 1]) == math.type(t[i]))
end
end
-- Some tests are done inside small anonymous functions to ensure
-- that constants go to constant table even in debug compilation,
-- when the constant table is very small.
assert(b+5 == b); checkcap{"add", b, 5}
assert(5.2 + b == 5.2); checkcap{"add", 5.2, b}
assert(b+'5' == b); checkcap{"add", b, '5'}
assert(5+b == 5); checkcap{"add", 5, b}
assert('5'+b == '5'); checkcap{"add", '5', b}
b=b-3; assert(getmetatable(b) == t); checkcap{"sub", b, 3}
assert(5-a == 5); checkcap{"sub", 5, a}
assert('5'-a == '5'); checkcap{"sub", '5', a}
assert(a*a == a); checkcap{"mul", a, a}
assert(a/0 == a); checkcap{"div", a, 0}
assert(a/0.0 == a); checkcap{"div", a, 0.0}
assert(a%2 == a); checkcap{"mod", a, 2}
assert(a // (1/0) == a); checkcap{"idiv", a, 1/0}
;(function () assert(a & "hi" == a) end)(); checkcap{"band", a, "hi"}
;(function () assert(10 & a == 10) end)(); checkcap{"band", 10, a}
;(function () assert(a | 10 == a) end)(); checkcap{"bor", a, 10}
assert(a | "hi" == a); checkcap{"bor", a, "hi"}
assert("hi" ~ a == "hi"); checkcap{"bxor", "hi", a}
;(function () assert(10 ~ a == 10) end)(); checkcap{"bxor", 10, a}
assert(-a == a); checkcap{"unm", a, a}
assert(a^4.0 == a); checkcap{"pow", a, 4.0}
assert(a^'4' == a); checkcap{"pow", a, '4'}
assert(4^a == 4); checkcap{"pow", 4, a}
assert('4'^a == '4'); checkcap{"pow", '4', a}
assert(#a == a); checkcap{"len", a, a}
assert(~a == a); checkcap{"bnot", a, a}
assert(a << 3 == a); checkcap{"shl", a, 3}
assert(1.5 >> a == 1.5); checkcap{"shr", 1.5, a}
-- for comparison operators, all results are true
assert(5.0 > a); checkcap{"lt", a, 5.0}
assert(a >= 10); checkcap{"le", 10, a}
assert(a <= -10.0); checkcap{"le", a, -10.0}
assert(a < -10); checkcap{"lt", a, -10}
-- test for rawlen
t = setmetatable({1,2,3}, {__len = function () return 10 end})
assert(#t == 10 and rawlen(t) == 3)
assert(rawlen"abc" == 3)
assert(not pcall(rawlen, io.stdin))
assert(not pcall(rawlen, 34))
assert(not pcall(rawlen))
-- rawlen for long strings
assert(rawlen(string.rep('a', 1000)) == 1000)
t = {}
t.__lt = function (a,b,c)
collectgarbage()
assert(c == nil)
if type(a) == 'table' then a = a.x end
if type(b) == 'table' then b = b.x end
return a<b, "dummy"
end
t.__le = function (a,b,c)
assert(c == nil)
if type(a) == 'table' then a = a.x end
if type(b) == 'table' then b = b.x end
return a<=b, "dummy"
end
t.__eq = function (a,b,c)
assert(c == nil)
if type(a) == 'table' then a = a.x end
if type(b) == 'table' then b = b.x end
return a == b, "dummy"
end
function Op(x) return setmetatable({x=x}, t) end
local function test (a, b, c)
assert(not(Op(1)<Op(1)) and (Op(1)<Op(2)) and not(Op(2)<Op(1)))
assert(not(1 < Op(1)) and (Op(1) < 2) and not(2 < Op(1)))
assert(not(Op('a')<Op('a')) and (Op('a')<Op('b')) and not(Op('b')<Op('a')))
assert(not('a' < Op('a')) and (Op('a') < 'b') and not(Op('b') < Op('a')))
assert((Op(1)<=Op(1)) and (Op(1)<=Op(2)) and not(Op(2)<=Op(1)))
assert((Op('a')<=Op('a')) and (Op('a')<=Op('b')) and not(Op('b')<=Op('a')))
assert(not(Op(1)>Op(1)) and not(Op(1)>Op(2)) and (Op(2)>Op(1)))
assert(not(Op('a')>Op('a')) and not(Op('a')>Op('b')) and (Op('b')>Op('a')))
assert((Op(1)>=Op(1)) and not(Op(1)>=Op(2)) and (Op(2)>=Op(1)))
assert((1 >= Op(1)) and not(1 >= Op(2)) and (Op(2) >= 1))
assert((Op('a')>=Op('a')) and not(Op('a')>=Op('b')) and (Op('b')>=Op('a')))
assert(('a' >= Op('a')) and not(Op('a') >= 'b') and (Op('b') >= Op('a')))
assert(Op(1) == Op(1) and Op(1) ~= Op(2))
assert(Op('a') == Op('a') and Op('a') ~= Op('b'))
assert(a == a and a ~= b)
assert(Op(3) == c)
end
test(Op(1), Op(2), Op(3))
-- test `partial order'
local function rawSet(x)
local y = {}
for _,k in pairs(x) do y[k] = 1 end
return y
end
local function Set(x)
return setmetatable(rawSet(x), t)
end
t.__lt = function (a,b)
for k in pairs(a) do
if not b[k] then return false end
b[k] = undef
end
return next(b) ~= nil
end
t.__le = function (a,b)
for k in pairs(a) do
if not b[k] then return false end
end
return true
end
assert(Set{1,2,3} < Set{1,2,3,4})
assert(not(Set{1,2,3,4} < Set{1,2,3,4}))
assert((Set{1,2,3,4} <= Set{1,2,3,4}))
assert((Set{1,2,3,4} >= Set{1,2,3,4}))
assert(not (Set{1,3} <= Set{3,5}))
assert(not(Set{1,3} <= Set{3,5}))
assert(not(Set{1,3} >= Set{3,5}))
t.__eq = function (a,b)
for k in pairs(a) do
if not b[k] then return false end
b[k] = undef
end
return next(b) == nil
end
local s = Set{1,3,5}
assert(s == Set{3,5,1})
assert(not rawequal(s, Set{3,5,1}))
assert(rawequal(s, s))
assert(Set{1,3,5,1} == rawSet{3,5,1})
assert(rawSet{1,3,5,1} == Set{3,5,1})
assert(Set{1,3,5} ~= Set{3,5,1,6})
-- '__eq' is not used for table accesses
t[Set{1,3,5}] = 1
assert(t[Set{1,3,5}] == undef)
do -- test invalidating flags
local mt = {__eq = true}
local a = setmetatable({10}, mt)
local b = setmetatable({10}, mt)
mt.__eq = nil
assert(a ~= b) -- no metamethod
mt.__eq = function (x,y) return x[1] == y[1] end
assert(a == b) -- must use metamethod now
end
if not T then
(Message or print)('\n >>> testC not active: skipping tests for \z
userdata <<<\n')
else
local u1 = T.newuserdata(0, 1)
local u2 = T.newuserdata(0, 1)
local u3 = T.newuserdata(0, 1)
assert(u1 ~= u2 and u1 ~= u3)
debug.setuservalue(u1, 1);
debug.setuservalue(u2, 2);
debug.setuservalue(u3, 1);
debug.setmetatable(u1, {__eq = function (a, b)
return debug.getuservalue(a) == debug.getuservalue(b)
end})
debug.setmetatable(u2, {__eq = function (a, b)
return true
end})
assert(u1 == u3 and u3 == u1 and u1 ~= u2)
assert(u2 == u1 and u2 == u3 and u3 == u2)
assert(u2 ~= {}) -- different types cannot be equal
assert(rawequal(u1, u1) and not rawequal(u1, u3))
local mirror = {}
debug.setmetatable(u3, {__index = mirror, __newindex = mirror})
for i = 1, 10 do u3[i] = i end
for i = 1, 10 do assert(u3[i] == i) end
end
t.__concat = function (a,b,c)
assert(c == nil)
if type(a) == 'table' then a = a.val end
if type(b) == 'table' then b = b.val end
if A then return a..b
else
return setmetatable({val=a..b}, t)
end
end
c = {val="c"}; setmetatable(c, t)
d = {val="d"}; setmetatable(d, t)
A = true
assert(c..d == 'cd')
assert(0 .."a".."b"..c..d.."e".."f"..(5+3).."g" == "0abcdef8g")
A = false
assert((c..d..c..d).val == 'cdcd')
x = c..d
assert(getmetatable(x) == t and x.val == 'cd')
x = 0 .."a".."b"..c..d.."e".."f".."g"
assert(x.val == "0abcdefg")
-- concat metamethod x numbers (bug in 5.1.1)
c = {}
local x
setmetatable(c, {__concat = function (a,b)
assert(type(a) == "number" and b == c or type(b) == "number" and a == c)
return c
end})
assert(c..5 == c and 5 .. c == c)
assert(4 .. c .. 5 == c and 4 .. 5 .. 6 .. 7 .. c == c)
-- test comparison compatibilities
local t1, t2, c, d
t1 = {}; c = {}; setmetatable(c, t1)
d = {}
t1.__eq = function () return true end
t1.__lt = function () return true end
t1.__le = function () return false end
setmetatable(d, t1)
assert(c == d and c < d and not(d <= c))
t2 = {}
t2.__eq = t1.__eq
t2.__lt = t1.__lt
setmetatable(d, t2)
assert(c == d and c < d and not(d <= c))
-- test for several levels of calls
local i
local tt = {
__call = function (t, ...)
i = i+1
if t.f then return t.f(...)
else return {...}
end
end
}
local a = setmetatable({}, tt)
local b = setmetatable({f=a}, tt)
local c = setmetatable({f=b}, tt)
i = 0
x = c(3,4,5)
assert(i == 3 and x[1] == 3 and x[3] == 5)
assert(_G.X == 20)
_G.X, _G.B = nil
print'+'
local _g = _G
_ENV = setmetatable({}, {__index=function (_,k) return _g[k] end})
a = {}
rawset(a, "x", 1, 2, 3)
assert(a.x == 1 and rawget(a, "x", 3) == 1)
print '+'
-- testing metatables for basic types
mt = {__index = function (a,b) return a+b end,
__len = function (x) return math.floor(x) end}
debug.setmetatable(10, mt)
assert(getmetatable(-2) == mt)
assert((10)[3] == 13)
assert((10)["3"] == 13)
assert(#3.45 == 3)
debug.setmetatable(23, nil)
assert(getmetatable(-2) == nil)
debug.setmetatable(true, mt)
assert(getmetatable(false) == mt)
mt.__index = function (a,b) return a or b end
assert((true)[false] == true)
assert((false)[false] == false)
debug.setmetatable(false, nil)
assert(getmetatable(true) == nil)
debug.setmetatable(nil, mt)
assert(getmetatable(nil) == mt)
mt.__add = function (a,b) return (a or 1) + (b or 2) end
assert(10 + nil == 12)
assert(nil + 23 == 24)
assert(nil + nil == 3)
debug.setmetatable(nil, nil)
assert(getmetatable(nil) == nil)
debug.setmetatable(nil, {})
-- loops in delegation
a = {}; setmetatable(a, a); a.__index = a; a.__newindex = a
assert(not pcall(function (a,b) return a[b] end, a, 10))
assert(not pcall(function (a,b,c) a[b] = c end, a, 10, true))
-- bug in 5.1
T, K, V = nil
grandparent = {}
grandparent.__newindex = function(t,k,v) T=t; K=k; V=v end
parent = {}
parent.__newindex = parent
setmetatable(parent, grandparent)
child = setmetatable({}, parent)
child.foo = 10 --> CRASH (on some machines)
assert(T == parent and K == "foo" and V == 10)
print 'OK'
return 12

951
lua-5.4.7-tests/files.lua Normal file
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@ -0,0 +1,951 @@
-- $Id: testes/files.lua $
-- See Copyright Notice in file all.lua
local debug = require "debug"
local maxint = math.maxinteger
assert(type(os.getenv"PATH") == "string")
assert(io.input(io.stdin) == io.stdin)
assert(not pcall(io.input, "non-existent-file"))
assert(io.output(io.stdout) == io.stdout)
local function testerr (msg, f, ...)
local stat, err = pcall(f, ...)
return (not stat and string.find(err, msg, 1, true))
end
local function checkerr (msg, f, ...)
assert(testerr(msg, f, ...))
end
-- cannot close standard files
assert(not io.close(io.stdin) and
not io.stdout:close() and
not io.stderr:close())
-- cannot call close method without an argument (new in 5.3.5)
checkerr("got no value", io.stdin.close)
assert(type(io.input()) == "userdata" and io.type(io.output()) == "file")
assert(type(io.stdin) == "userdata" and io.type(io.stderr) == "file")
assert(not io.type(8))
local a = {}; setmetatable(a, {})
assert(not io.type(a))
assert(getmetatable(io.input()).__name == "FILE*")
local a,b,c = io.open('xuxu_nao_existe')
assert(not a and type(b) == "string" and type(c) == "number")
a,b,c = io.open('/a/b/c/d', 'w')
assert(not a and type(b) == "string" and type(c) == "number")
local file = os.tmpname()
local f, msg = io.open(file, "w")
if not f then
(Message or print)("'os.tmpname' file cannot be open; skipping file tests")
else --{ most tests here need tmpname
f:close()
print('testing i/o')
local otherfile = os.tmpname()
checkerr("invalid mode", io.open, file, "rw")
checkerr("invalid mode", io.open, file, "rb+")
checkerr("invalid mode", io.open, file, "r+bk")
checkerr("invalid mode", io.open, file, "")
checkerr("invalid mode", io.open, file, "+")
checkerr("invalid mode", io.open, file, "b")
assert(io.open(file, "r+b")):close()
assert(io.open(file, "r+")):close()
assert(io.open(file, "rb")):close()
assert(os.setlocale('C', 'all'))
io.input(io.stdin); io.output(io.stdout);
os.remove(file)
assert(not loadfile(file))
checkerr("", dofile, file)
assert(not io.open(file))
io.output(file)
assert(io.output() ~= io.stdout)
if not _port then -- invalid seek
local status, msg, code = io.stdin:seek("set", 1000)
assert(not status and type(msg) == "string" and type(code) == "number")
end
assert(io.output():seek() == 0)
assert(io.write("alo alo"):seek() == string.len("alo alo"))
assert(io.output():seek("cur", -3) == string.len("alo alo")-3)
assert(io.write("joao"))
assert(io.output():seek("end") == string.len("alo joao"))
assert(io.output():seek("set") == 0)
assert(io.write('"alo"', "{a}\n", "second line\n", "third line \n"))
assert(io.write('Xfourth_line'))
io.output(io.stdout)
collectgarbage() -- file should be closed by GC
assert(io.input() == io.stdin and rawequal(io.output(), io.stdout))
print('+')
-- test GC for files
collectgarbage()
for i=1,120 do
for i=1,5 do
io.input(file)
assert(io.open(file, 'r'))
io.lines(file)
end
collectgarbage()
end
io.input():close()
io.close()
assert(os.rename(file, otherfile))
assert(not os.rename(file, otherfile))
io.output(io.open(otherfile, "ab"))
assert(io.write("\n\n\t\t ", 3450, "\n"));
io.close()
do
-- closing file by scope
local F = nil
do
local f <close> = assert(io.open(file, "w"))
F = f
end
assert(tostring(F) == "file (closed)")
end
assert(os.remove(file))
do
-- test writing/reading numbers
local f <close> = assert(io.open(file, "w"))
f:write(maxint, '\n')
f:write(string.format("0X%x\n", maxint))
f:write("0xABCp-3", '\n')
f:write(0, '\n')
f:write(-maxint, '\n')
f:write(string.format("0x%X\n", -maxint))
f:write("-0xABCp-3", '\n')
assert(f:close())
local f <close> = assert(io.open(file, "r"))
assert(f:read("n") == maxint)
assert(f:read("n") == maxint)
assert(f:read("n") == 0xABCp-3)
assert(f:read("n") == 0)
assert(f:read("*n") == -maxint) -- test old format (with '*')
assert(f:read("n") == -maxint)
assert(f:read("*n") == -0xABCp-3) -- test old format (with '*')
end
assert(os.remove(file))
-- testing multiple arguments to io.read
do
local f <close> = assert(io.open(file, "w"))
f:write[[
a line
another line
1234
3.45
one
two
three
]]
local l1, l2, l3, l4, n1, n2, c, dummy
assert(f:close())
local f <close> = assert(io.open(file, "r"))
l1, l2, n1, n2, dummy = f:read("l", "L", "n", "n")
assert(l1 == "a line" and l2 == "another line\n" and
n1 == 1234 and n2 == 3.45 and dummy == nil)
assert(f:close())
local f <close> = assert(io.open(file, "r"))
l1, l2, n1, n2, c, l3, l4, dummy = f:read(7, "l", "n", "n", 1, "l", "l")
assert(l1 == "a line\n" and l2 == "another line" and c == '\n' and
n1 == 1234 and n2 == 3.45 and l3 == "one" and l4 == "two"
and dummy == nil)
assert(f:close())
local f <close> = assert(io.open(file, "r"))
-- second item failing
l1, n1, n2, dummy = f:read("l", "n", "n", "l")
assert(l1 == "a line" and not n1)
end
assert(os.remove(file))
-- test yielding during 'dofile'
f = assert(io.open(file, "w"))
f:write[[
local x, z = coroutine.yield(10)
local y = coroutine.yield(20)
return x + y * z
]]
assert(f:close())
f = coroutine.wrap(dofile)
assert(f(file) == 10)
assert(f(100, 101) == 20)
assert(f(200) == 100 + 200 * 101)
assert(os.remove(file))
f = assert(io.open(file, "w"))
-- test number termination
f:write[[
-12.3- -0xffff+ .3|5.E-3X +234e+13E 0xDEADBEEFDEADBEEFx
0x1.13Ap+3e
]]
-- very long number
f:write("1234"); for i = 1, 1000 do f:write("0") end; f:write("\n")
-- invalid sequences (must read and discard valid prefixes)
f:write[[
.e+ 0.e; --; 0xX;
]]
assert(f:close())
f = assert(io.open(file, "r"))
assert(f:read("n") == -12.3); assert(f:read(1) == "-")
assert(f:read("n") == -0xffff); assert(f:read(2) == "+ ")
assert(f:read("n") == 0.3); assert(f:read(1) == "|")
assert(f:read("n") == 5e-3); assert(f:read(1) == "X")
assert(f:read("n") == 234e13); assert(f:read(1) == "E")
assert(f:read("n") == 0Xdeadbeefdeadbeef); assert(f:read(2) == "x\n")
assert(f:read("n") == 0x1.13aP3); assert(f:read(1) == "e")
do -- attempt to read too long number
assert(not f:read("n")) -- fails
local s = f:read("L") -- read rest of line
assert(string.find(s, "^00*\n$")) -- lots of 0's left
end
assert(not f:read("n")); assert(f:read(2) == "e+")
assert(not f:read("n")); assert(f:read(1) == ";")
assert(not f:read("n")); assert(f:read(2) == "-;")
assert(not f:read("n")); assert(f:read(1) == "X")
assert(not f:read("n")); assert(f:read(1) == ";")
assert(not f:read("n")); assert(not f:read(0)) -- end of file
assert(f:close())
assert(os.remove(file))
-- test line generators
assert(not pcall(io.lines, "non-existent-file"))
assert(os.rename(otherfile, file))
io.output(otherfile)
local n = 0
local f = io.lines(file)
while f() do n = n + 1 end;
assert(n == 6) -- number of lines in the file
checkerr("file is already closed", f)
checkerr("file is already closed", f)
-- copy from file to otherfile
n = 0
for l in io.lines(file) do io.write(l, "\n"); n = n + 1 end
io.close()
assert(n == 6)
-- copy from otherfile back to file
local f = assert(io.open(otherfile))
assert(io.type(f) == "file")
io.output(file)
assert(not io.output():read())
n = 0
for l in f:lines() do io.write(l, "\n"); n = n + 1 end
assert(tostring(f):sub(1, 5) == "file ")
assert(f:close()); io.close()
assert(n == 6)
checkerr("closed file", io.close, f)
assert(tostring(f) == "file (closed)")
assert(io.type(f) == "closed file")
io.input(file)
f = io.open(otherfile):lines()
n = 0
for l in io.lines() do assert(l == f()); n = n + 1 end
f = nil; collectgarbage()
assert(n == 6)
assert(os.remove(otherfile))
do -- bug in 5.3.1
io.output(otherfile)
io.write(string.rep("a", 300), "\n")
io.close()
local t ={}; for i = 1, 250 do t[i] = 1 end
t = {io.lines(otherfile, table.unpack(t))()}
-- everything ok here
assert(#t == 250 and t[1] == 'a' and t[#t] == 'a')
t[#t + 1] = 1 -- one too many
checkerr("too many arguments", io.lines, otherfile, table.unpack(t))
collectgarbage() -- ensure 'otherfile' is closed
assert(os.remove(otherfile))
end
io.input(file)
do -- test error returns
local a,b,c = io.input():write("xuxu")
assert(not a and type(b) == "string" and type(c) == "number")
end
checkerr("invalid format", io.read, "x")
assert(io.read(0) == "") -- not eof
assert(io.read(5, 'l') == '"alo"')
assert(io.read(0) == "")
assert(io.read() == "second line")
local x = io.input():seek()
assert(io.read() == "third line ")
assert(io.input():seek("set", x))
assert(io.read('L') == "third line \n")
assert(io.read(1) == "X")
assert(io.read(string.len"fourth_line") == "fourth_line")
assert(io.input():seek("cur", -string.len"fourth_line"))
assert(io.read() == "fourth_line")
assert(io.read() == "") -- empty line
assert(io.read('n') == 3450)
assert(io.read(1) == '\n')
assert(not io.read(0)) -- end of file
assert(not io.read(1)) -- end of file
assert(not io.read(30000)) -- end of file
assert(({io.read(1)})[2] == undef)
assert(not io.read()) -- end of file
assert(({io.read()})[2] == undef)
assert(not io.read('n')) -- end of file
assert(({io.read('n')})[2] == undef)
assert(io.read('a') == '') -- end of file (OK for 'a')
assert(io.read('a') == '') -- end of file (OK for 'a')
collectgarbage()
print('+')
io.close(io.input())
checkerr(" input file is closed", io.read)
assert(os.remove(file))
local t = '0123456789'
for i=1,10 do t = t..t; end
assert(string.len(t) == 10*2^10)
io.output(file)
io.write("alo"):write("\n")
io.close()
checkerr(" output file is closed", io.write)
local f = io.open(file, "a+b")
io.output(f)
collectgarbage()
assert(io.write(' ' .. t .. ' '))
assert(io.write(';', 'end of file\n'))
f:flush(); io.flush()
f:close()
print('+')
io.input(file)
assert(io.read() == "alo")
assert(io.read(1) == ' ')
assert(io.read(string.len(t)) == t)
assert(io.read(1) == ' ')
assert(io.read(0))
assert(io.read('a') == ';end of file\n')
assert(not io.read(0))
assert(io.close(io.input()))
-- test errors in read/write
do
local function ismsg (m)
-- error message is not a code number
return (type(m) == "string" and not tonumber(m))
end
-- read
local f = io.open(file, "w")
local r, m, c = f:read()
assert(not r and ismsg(m) and type(c) == "number")
assert(f:close())
-- write
f = io.open(file, "r")
r, m, c = f:write("whatever")
assert(not r and ismsg(m) and type(c) == "number")
assert(f:close())
-- lines
f = io.open(file, "w")
r, m = pcall(f:lines())
assert(r == false and ismsg(m))
assert(f:close())
end
assert(os.remove(file))
-- test for L format
io.output(file); io.write"\n\nline\nother":close()
io.input(file)
assert(io.read"L" == "\n")
assert(io.read"L" == "\n")
assert(io.read"L" == "line\n")
assert(io.read"L" == "other")
assert(not io.read"L")
io.input():close()
local f = assert(io.open(file))
local s = ""
for l in f:lines("L") do s = s .. l end
assert(s == "\n\nline\nother")
f:close()
io.input(file)
s = ""
for l in io.lines(nil, "L") do s = s .. l end
assert(s == "\n\nline\nother")
io.input():close()
s = ""
for l in io.lines(file, "L") do s = s .. l end
assert(s == "\n\nline\nother")
s = ""
for l in io.lines(file, "l") do s = s .. l end
assert(s == "lineother")
io.output(file); io.write"a = 10 + 34\na = 2*a\na = -a\n":close()
local t = {}
assert(load(io.lines(file, "L"), nil, nil, t))()
assert(t.a == -((10 + 34) * 2))
do -- testing closing file in line iteration
-- get the to-be-closed variable from a loop
local function gettoclose (lv)
lv = lv + 1
local stvar = 0 -- to-be-closed is 4th state variable in the loop
for i = 1, 1000 do
local n, v = debug.getlocal(lv, i)
if n == "(for state)" then
stvar = stvar + 1
if stvar == 4 then return v end
end
end
end
local f
for l in io.lines(file) do
f = gettoclose(1)
assert(io.type(f) == "file")
break
end
assert(io.type(f) == "closed file")
f = nil
local function foo (name)
for l in io.lines(name) do
f = gettoclose(1)
assert(io.type(f) == "file")
error(f) -- exit loop with an error
end
end
local st, msg = pcall(foo, file)
assert(st == false and io.type(msg) == "closed file")
end
-- test for multipe arguments in 'lines'
io.output(file); io.write"0123456789\n":close()
for a,b in io.lines(file, 1, 1) do
if a == "\n" then assert(not b)
else assert(tonumber(a) == tonumber(b) - 1)
end
end
for a,b,c in io.lines(file, 1, 2, "a") do
assert(a == "0" and b == "12" and c == "3456789\n")
end
for a,b,c in io.lines(file, "a", 0, 1) do
if a == "" then break end
assert(a == "0123456789\n" and not b and not c)
end
collectgarbage() -- to close file in previous iteration
io.output(file); io.write"00\n10\n20\n30\n40\n":close()
for a, b in io.lines(file, "n", "n") do
if a == 40 then assert(not b)
else assert(a == b - 10)
end
end
-- test load x lines
io.output(file);
io.write[[
local y
= X
X =
X *
2 +
X;
X =
X
- y;
]]:close()
_G.X = 1
assert(not load((io.lines(file))))
collectgarbage() -- to close file in previous iteration
load((io.lines(file, "L")))()
assert(_G.X == 2)
load((io.lines(file, 1)))()
assert(_G.X == 4)
load((io.lines(file, 3)))()
assert(_G.X == 8)
_G.X = nil
print('+')
local x1 = "string\n\n\\com \"\"''coisas [[estranhas]] ]]'"
io.output(file)
assert(io.write(string.format("X2 = %q\n-- comment without ending EOS", x1)))
io.close()
assert(loadfile(file))()
assert(x1 == _G.X2)
_G.X2 = nil
print('+')
assert(os.remove(file))
assert(not os.remove(file))
assert(not os.remove(otherfile))
-- testing loadfile
local function testloadfile (s, expres)
io.output(file)
if s then io.write(s) end
io.close()
local res = assert(loadfile(file))()
assert(os.remove(file))
assert(res == expres)
end
-- loading empty file
testloadfile(nil, nil)
-- loading file with initial comment without end of line
testloadfile("# a non-ending comment", nil)
-- checking Unicode BOM in files
testloadfile("\xEF\xBB\xBF# some comment\nreturn 234", 234)
testloadfile("\xEF\xBB\xBFreturn 239", 239)
testloadfile("\xEF\xBB\xBF", nil) -- empty file with a BOM
-- checking line numbers in files with initial comments
testloadfile("# a comment\nreturn require'debug'.getinfo(1).currentline", 2)
-- loading binary file
io.output(io.open(file, "wb"))
assert(io.write(string.dump(function () return 10, '\0alo\255', 'hi' end)))
io.close()
a, b, c = assert(loadfile(file))()
assert(a == 10 and b == "\0alo\255" and c == "hi")
assert(os.remove(file))
-- bug in 5.2.1
do
io.output(io.open(file, "wb"))
-- save function with no upvalues
assert(io.write(string.dump(function () return 1 end)))
io.close()
f = assert(loadfile(file, "b", {}))
assert(type(f) == "function" and f() == 1)
assert(os.remove(file))
end
-- loading binary file with initial comment
io.output(io.open(file, "wb"))
assert(io.write("#this is a comment for a binary file\0\n",
string.dump(function () return 20, '\0\0\0' end)))
io.close()
a, b, c = assert(loadfile(file))()
assert(a == 20 and b == "\0\0\0" and c == nil)
assert(os.remove(file))
-- 'loadfile' with 'env'
do
local f = io.open(file, 'w')
f:write[[
if (...) then a = 15; return b, c, d
else return _ENV
end
]]
f:close()
local t = {b = 12, c = "xuxu", d = print}
local f = assert(loadfile(file, 't', t))
local b, c, d = f(1)
assert(t.a == 15 and b == 12 and c == t.c and d == print)
assert(f() == t)
f = assert(loadfile(file, 't', nil))
assert(f() == nil)
f = assert(loadfile(file))
assert(f() == _G)
assert(os.remove(file))
end
-- 'loadfile' x modes
do
io.open(file, 'w'):write("return 10"):close()
local s, m = loadfile(file, 'b')
assert(not s and string.find(m, "a text chunk"))
io.open(file, 'w'):write("\27 return 10"):close()
local s, m = loadfile(file, 't')
assert(not s and string.find(m, "a binary chunk"))
assert(os.remove(file))
end
io.output(file)
assert(io.write("qualquer coisa\n"))
assert(io.write("mais qualquer coisa"))
io.close()
assert(io.output(assert(io.open(otherfile, 'wb')))
:write("outra coisa\0\1\3\0\0\0\0\255\0")
:close())
local filehandle = assert(io.open(file, 'r+'))
local otherfilehandle = assert(io.open(otherfile, 'rb'))
assert(filehandle ~= otherfilehandle)
assert(type(filehandle) == "userdata")
assert(filehandle:read('l') == "qualquer coisa")
io.input(otherfilehandle)
assert(io.read(string.len"outra coisa") == "outra coisa")
assert(filehandle:read('l') == "mais qualquer coisa")
filehandle:close();
assert(type(filehandle) == "userdata")
io.input(otherfilehandle)
assert(io.read(4) == "\0\1\3\0")
assert(io.read(3) == "\0\0\0")
assert(io.read(0) == "") -- 255 is not eof
assert(io.read(1) == "\255")
assert(io.read('a') == "\0")
assert(not io.read(0))
assert(otherfilehandle == io.input())
otherfilehandle:close()
assert(os.remove(file))
assert(os.remove(otherfile))
collectgarbage()
io.output(file)
:write[[
123.4 -56e-2 not a number
second line
third line
and the rest of the file
]]
:close()
io.input(file)
local _,a,b,c,d,e,h,__ = io.read(1, 'n', 'n', 'l', 'l', 'l', 'a', 10)
assert(io.close(io.input()))
assert(_ == ' ' and not __)
assert(type(a) == 'number' and a==123.4 and b==-56e-2)
assert(d=='second line' and e=='third line')
assert(h==[[
and the rest of the file
]])
assert(os.remove(file))
collectgarbage()
-- testing buffers
do
local f = assert(io.open(file, "w"))
local fr = assert(io.open(file, "r"))
assert(f:setvbuf("full", 2000))
f:write("x")
assert(fr:read("all") == "") -- full buffer; output not written yet
f:close()
fr:seek("set")
assert(fr:read("all") == "x") -- `close' flushes it
f = assert(io.open(file), "w")
assert(f:setvbuf("no"))
f:write("x")
fr:seek("set")
assert(fr:read("all") == "x") -- no buffer; output is ready
f:close()
f = assert(io.open(file, "a"))
assert(f:setvbuf("line"))
f:write("x")
fr:seek("set", 1)
assert(fr:read("all") == "") -- line buffer; no output without `\n'
f:write("a\n"):seek("set", 1)
assert(fr:read("all") == "xa\n") -- now we have a whole line
f:close(); fr:close()
assert(os.remove(file))
end
if not _soft then
print("testing large files (> BUFSIZ)")
io.output(file)
for i=1,5001 do io.write('0123456789123') end
io.write('\n12346'):close()
io.input(file)
local x = io.read('a')
io.input():seek('set', 0)
local y = io.read(30001)..io.read(1005)..io.read(0)..
io.read(1)..io.read(100003)
assert(x == y and string.len(x) == 5001*13 + 6)
io.input():seek('set', 0)
y = io.read() -- huge line
assert(x == y..'\n'..io.read())
assert(not io.read())
io.close(io.input())
assert(os.remove(file))
x = nil; y = nil
end
if not _port then
local progname
do -- get name of running executable
local arg = arg or ARG
local i = 0
while arg[i] do i = i - 1 end
progname = '"' .. arg[i + 1] .. '"'
end
print("testing popen/pclose and execute")
-- invalid mode for popen
checkerr("invalid mode", io.popen, "cat", "")
checkerr("invalid mode", io.popen, "cat", "r+")
checkerr("invalid mode", io.popen, "cat", "rw")
do -- basic tests for popen
local file = os.tmpname()
local f = assert(io.popen("cat - > " .. file, "w"))
f:write("a line")
assert(f:close())
local f = assert(io.popen("cat - < " .. file, "r"))
assert(f:read("a") == "a line")
assert(f:close())
assert(os.remove(file))
end
local tests = {
-- command, what, code
{"ls > /dev/null", "ok"},
{"not-to-be-found-command", "exit"},
{"exit 3", "exit", 3},
{"exit 129", "exit", 129},
{"kill -s HUP $$", "signal", 1},
{"kill -s KILL $$", "signal", 9},
{"sh -c 'kill -s HUP $$'", "exit"},
{progname .. ' -e " "', "ok"},
{progname .. ' -e "os.exit(0, true)"', "ok"},
{progname .. ' -e "os.exit(20, true)"', "exit", 20},
}
print("\n(some error messages are expected now)")
for _, v in ipairs(tests) do
local x, y, z = io.popen(v[1]):close()
local x1, y1, z1 = os.execute(v[1])
assert(x == x1 and y == y1 and z == z1)
if v[2] == "ok" then
assert(x and y == 'exit' and z == 0)
else
assert(not x and y == v[2]) -- correct status and 'what'
-- correct code if known (but always different from 0)
assert((v[3] == nil and z > 0) or v[3] == z)
end
end
end
-- testing tmpfile
f = io.tmpfile()
assert(io.type(f) == "file")
f:write("alo")
f:seek("set")
assert(f:read"a" == "alo")
end --}
print'+'
print("testing date/time")
assert(os.date("") == "")
assert(os.date("!") == "")
assert(os.date("\0\0") == "\0\0")
assert(os.date("!\0\0") == "\0\0")
local x = string.rep("a", 10000)
assert(os.date(x) == x)
local t = os.time()
D = os.date("*t", t)
assert(os.date(string.rep("%d", 1000), t) ==
string.rep(os.date("%d", t), 1000))
assert(os.date(string.rep("%", 200)) == string.rep("%", 100))
local function checkDateTable (t)
_G.D = os.date("*t", t)
assert(os.time(D) == t)
load(os.date([[assert(D.year==%Y and D.month==%m and D.day==%d and
D.hour==%H and D.min==%M and D.sec==%S and
D.wday==%w+1 and D.yday==%j)]], t))()
_G.D = nil
end
checkDateTable(os.time())
if not _port then
-- assume that time_t can represent these values
checkDateTable(0)
checkDateTable(1)
checkDateTable(1000)
checkDateTable(0x7fffffff)
checkDateTable(0x80000000)
end
checkerr("invalid conversion specifier", os.date, "%")
checkerr("invalid conversion specifier", os.date, "%9")
checkerr("invalid conversion specifier", os.date, "%")
checkerr("invalid conversion specifier", os.date, "%O")
checkerr("invalid conversion specifier", os.date, "%E")
checkerr("invalid conversion specifier", os.date, "%Ea")
checkerr("not an integer", os.time, {year=1000, month=1, day=1, hour='x'})
checkerr("not an integer", os.time, {year=1000, month=1, day=1, hour=1.5})
checkerr("missing", os.time, {hour = 12}) -- missing date
if string.packsize("i") == 4 then -- 4-byte ints
checkerr("field 'year' is out-of-bound", os.time,
{year = -(1 << 31) + 1899, month = 1, day = 1})
checkerr("field 'year' is out-of-bound", os.time,
{year = -(1 << 31), month = 1, day = 1})
if math.maxinteger > 2^31 then -- larger lua_integer?
checkerr("field 'year' is out-of-bound", os.time,
{year = (1 << 31) + 1900, month = 1, day = 1})
end
end
if not _port then
-- test Posix-specific modifiers
assert(type(os.date("%Ex")) == 'string')
assert(type(os.date("%Oy")) == 'string')
-- test large dates (assume at least 4-byte ints and time_t)
local t0 = os.time{year = 1970, month = 1, day = 0}
local t1 = os.time{year = 1970, month = 1, day = 0, sec = (1 << 31) - 1}
assert(t1 - t0 == (1 << 31) - 1)
t0 = os.time{year = 1970, month = 1, day = 1}
t1 = os.time{year = 1970, month = 1, day = 1, sec = -(1 << 31)}
assert(t1 - t0 == -(1 << 31))
-- test out-of-range dates (at least for Unix)
if maxint >= 2^62 then -- cannot do these tests in Small Lua
-- no arith overflows
checkerr("out-of-bound", os.time, {year = -maxint, month = 1, day = 1})
if string.packsize("i") == 4 then -- 4-byte ints
if testerr("out-of-bound", os.date, "%Y", 2^40) then
-- time_t has 4 bytes and therefore cannot represent year 4000
print(" 4-byte time_t")
checkerr("cannot be represented", os.time, {year=4000, month=1, day=1})
else
-- time_t has 8 bytes; an int year cannot represent a huge time
print(" 8-byte time_t")
checkerr("cannot be represented", os.date, "%Y", 2^60)
-- this is the maximum year
assert(tonumber(os.time
{year=(1 << 31) + 1899, month=12, day=31, hour=23, min=59, sec=59}))
-- this is too much
checkerr("represented", os.time,
{year=(1 << 31) + 1899, month=12, day=31, hour=23, min=59, sec=60})
end
-- internal 'int' fields cannot hold these values
checkerr("field 'day' is out-of-bound", os.time,
{year = 0, month = 1, day = 2^32})
checkerr("field 'month' is out-of-bound", os.time,
{year = 0, month = -((1 << 31) + 1), day = 1})
checkerr("field 'year' is out-of-bound", os.time,
{year = (1 << 31) + 1900, month = 1, day = 1})
else -- 8-byte ints
-- assume time_t has 8 bytes too
print(" 8-byte time_t")
assert(tonumber(os.date("%Y", 2^60)))
-- but still cannot represent a huge year
checkerr("cannot be represented", os.time, {year=2^60, month=1, day=1})
end
end
end
do
local D = os.date("*t")
local t = os.time(D)
if D.isdst == nil then
print("no daylight saving information")
else
assert(type(D.isdst) == 'boolean')
end
D.isdst = nil
local t1 = os.time(D)
assert(t == t1) -- if isdst is absent uses correct default
end
local D = os.date("*t")
t = os.time(D)
D.year = D.year-1;
local t1 = os.time(D)
-- allow for leap years
assert(math.abs(os.difftime(t,t1)/(24*3600) - 365) < 2)
-- should not take more than 1 second to execute these two lines
t = os.time()
t1 = os.time(os.date("*t"))
local diff = os.difftime(t1,t)
assert(0 <= diff and diff <= 1)
diff = os.difftime(t,t1)
assert(-1 <= diff and diff <= 0)
local t1 = os.time{year=2000, month=10, day=1, hour=23, min=12}
local t2 = os.time{year=2000, month=10, day=1, hour=23, min=10, sec=19}
assert(os.difftime(t1,t2) == 60*2-19)
-- since 5.3.3, 'os.time' normalizes table fields
t1 = {year = 2005, month = 1, day = 1, hour = 1, min = 0, sec = -3602}
os.time(t1)
assert(t1.day == 31 and t1.month == 12 and t1.year == 2004 and
t1.hour == 23 and t1.min == 59 and t1.sec == 58 and
t1.yday == 366)
io.output(io.stdout)
local t = os.date('%d %m %Y %H %M %S')
local d, m, a, h, min, s = string.match(t,
"(%d+) (%d+) (%d+) (%d+) (%d+) (%d+)")
d = tonumber(d)
m = tonumber(m)
a = tonumber(a)
h = tonumber(h)
min = tonumber(min)
s = tonumber(s)
io.write(string.format('test done on %2.2d/%2.2d/%d', d, m, a))
io.write(string.format(', at %2.2d:%2.2d:%2.2d\n', h, min, s))
io.write(string.format('%s\n', _VERSION))

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@ -0,0 +1,695 @@
-- $Id: testes/gc.lua $
-- See Copyright Notice in file all.lua
print('testing incremental garbage collection')
local debug = require"debug"
assert(collectgarbage("isrunning"))
collectgarbage()
local oldmode = collectgarbage("incremental")
-- changing modes should return previous mode
assert(collectgarbage("generational") == "incremental")
assert(collectgarbage("generational") == "generational")
assert(collectgarbage("incremental") == "generational")
assert(collectgarbage("incremental") == "incremental")
local function nop () end
local function gcinfo ()
return collectgarbage"count" * 1024
end
-- test weird parameters to 'collectgarbage'
do
-- save original parameters
local a = collectgarbage("setpause", 200)
local b = collectgarbage("setstepmul", 200)
local t = {0, 2, 10, 90, 500, 5000, 30000, 0x7ffffffe}
for i = 1, #t do
local p = t[i]
for j = 1, #t do
local m = t[j]
collectgarbage("setpause", p)
collectgarbage("setstepmul", m)
collectgarbage("step", 0)
collectgarbage("step", 10000)
end
end
-- restore original parameters
collectgarbage("setpause", a)
collectgarbage("setstepmul", b)
collectgarbage()
end
_G["while"] = 234
--
-- tests for GC activation when creating different kinds of objects
--
local function GC1 ()
local u
local b -- (above 'u' it in the stack)
local finish = false
u = setmetatable({}, {__gc = function () finish = true end})
b = {34}
repeat u = {} until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
finish = false; local i = 1
u = setmetatable({}, {__gc = function () finish = true end})
repeat i = i + 1; u = tostring(i) .. tostring(i) until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
finish = false
u = setmetatable({}, {__gc = function () finish = true end})
repeat local i; u = function () return i end until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
end
local function GC2 ()
local u
local finish = false
u = {setmetatable({}, {__gc = function () finish = true end})}
local b = {34}
repeat u = {{}} until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
finish = false; local i = 1
u = {setmetatable({}, {__gc = function () finish = true end})}
repeat i = i + 1; u = {tostring(i) .. tostring(i)} until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
finish = false
u = {setmetatable({}, {__gc = function () finish = true end})}
repeat local i; u = {function () return i end} until finish
assert(b[1] == 34) -- 'u' was collected, but 'b' was not
end
local function GC() GC1(); GC2() end
do
print("creating many objects")
local limit = 5000
for i = 1, limit do
local a = {}; a = nil
end
local a = "a"
for i = 1, limit do
a = i .. "b";
a = string.gsub(a, '(%d%d*)', "%1 %1")
a = "a"
end
a = {}
function a:test ()
for i = 1, limit do
load(string.format("function temp(a) return 'a%d' end", i), "")()
assert(temp() == string.format('a%d', i))
end
end
a:test()
_G.temp = nil
end
-- collection of functions without locals, globals, etc.
do local f = function () end end
print("functions with errors")
local prog = [[
do
a = 10;
function foo(x,y)
a = sin(a+0.456-0.23e-12);
return function (z) return sin(%x+z) end
end
local x = function (w) a=a+w; end
end
]]
do
local step = 1
if _soft then step = 13 end
for i=1, string.len(prog), step do
for j=i, string.len(prog), step do
pcall(load(string.sub(prog, i, j), ""))
end
end
end
rawset(_G, "a", nil)
_G.x = nil
do
foo = nil
print('long strings')
local x = "01234567890123456789012345678901234567890123456789012345678901234567890123456789"
assert(string.len(x)==80)
local s = ''
local k = math.min(300, (math.maxinteger // 80) // 2)
for n = 1, k do s = s..x; local j=tostring(n) end
assert(string.len(s) == k*80)
s = string.sub(s, 1, 10000)
local s, i = string.gsub(s, '(%d%d%d%d)', '')
assert(i==10000 // 4)
assert(_G["while"] == 234)
_G["while"] = nil
end
--
-- test the "size" of basic GC steps (whatever they mean...)
--
do
print("steps")
print("steps (2)")
local function dosteps (siz)
collectgarbage()
local a = {}
for i=1,100 do a[i] = {{}}; local b = {} end
local x = gcinfo()
local i = 0
repeat -- do steps until it completes a collection cycle
i = i+1
until collectgarbage("step", siz)
assert(gcinfo() < x)
return i -- number of steps
end
collectgarbage"stop"
if not _port then
assert(dosteps(10) < dosteps(2))
end
-- collector should do a full collection with so many steps
assert(dosteps(20000) == 1)
assert(collectgarbage("step", 20000) == true)
assert(collectgarbage("step", 20000) == true)
assert(not collectgarbage("isrunning"))
collectgarbage"restart"
assert(collectgarbage("isrunning"))
end
if not _port then
-- test the pace of the collector
collectgarbage(); collectgarbage()
local x = gcinfo()
collectgarbage"stop"
repeat
local a = {}
until gcinfo() > 3 * x
collectgarbage"restart"
assert(collectgarbage("isrunning"))
repeat
local a = {}
until gcinfo() <= x * 2
end
print("clearing tables")
local lim = 15
local a = {}
-- fill a with `collectable' indices
for i=1,lim do a[{}] = i end
b = {}
for k,v in pairs(a) do b[k]=v end
-- remove all indices and collect them
for n in pairs(b) do
a[n] = undef
assert(type(n) == 'table' and next(n) == nil)
collectgarbage()
end
b = nil
collectgarbage()
for n in pairs(a) do error'cannot be here' end
for i=1,lim do a[i] = i end
for i=1,lim do assert(a[i] == i) end
print('weak tables')
a = {}; setmetatable(a, {__mode = 'k'});
-- fill a with some `collectable' indices
for i=1,lim do a[{}] = i end
-- and some non-collectable ones
for i=1,lim do a[i] = i end
for i=1,lim do local s=string.rep('@', i); a[s] = s..'#' end
collectgarbage()
local i = 0
for k,v in pairs(a) do assert(k==v or k..'#'==v); i=i+1 end
assert(i == 2*lim)
a = {}; setmetatable(a, {__mode = 'v'});
a[1] = string.rep('b', 21)
collectgarbage()
assert(a[1]) -- strings are *values*
a[1] = undef
-- fill a with some `collectable' values (in both parts of the table)
for i=1,lim do a[i] = {} end
for i=1,lim do a[i..'x'] = {} end
-- and some non-collectable ones
for i=1,lim do local t={}; a[t]=t end
for i=1,lim do a[i+lim]=i..'x' end
collectgarbage()
local i = 0
for k,v in pairs(a) do assert(k==v or k-lim..'x' == v); i=i+1 end
assert(i == 2*lim)
a = {}; setmetatable(a, {__mode = 'kv'});
local x, y, z = {}, {}, {}
-- keep only some items
a[1], a[2], a[3] = x, y, z
a[string.rep('$', 11)] = string.rep('$', 11)
-- fill a with some `collectable' values
for i=4,lim do a[i] = {} end
for i=1,lim do a[{}] = i end
for i=1,lim do local t={}; a[t]=t end
collectgarbage()
assert(next(a) ~= nil)
local i = 0
for k,v in pairs(a) do
assert((k == 1 and v == x) or
(k == 2 and v == y) or
(k == 3 and v == z) or k==v);
i = i+1
end
assert(i == 4)
x,y,z=nil
collectgarbage()
assert(next(a) == string.rep('$', 11))
-- 'bug' in 5.1
a = {}
local t = {x = 10}
local C = setmetatable({key = t}, {__mode = 'v'})
local C1 = setmetatable({[t] = 1}, {__mode = 'k'})
a.x = t -- this should not prevent 't' from being removed from
-- weak table 'C' by the time 'a' is finalized
setmetatable(a, {__gc = function (u)
assert(C.key == nil)
assert(type(next(C1)) == 'table')
end})
a, t = nil
collectgarbage()
collectgarbage()
assert(next(C) == nil and next(C1) == nil)
C, C1 = nil
-- ephemerons
local mt = {__mode = 'k'}
a = {{10},{20},{30},{40}}; setmetatable(a, mt)
x = nil
for i = 1, 100 do local n = {}; a[n] = {k = {x}}; x = n end
GC()
local n = x
local i = 0
while n do n = a[n].k[1]; i = i + 1 end
assert(i == 100)
x = nil
GC()
for i = 1, 4 do assert(a[i][1] == i * 10); a[i] = undef end
assert(next(a) == nil)
local K = {}
a[K] = {}
for i=1,10 do a[K][i] = {}; a[a[K][i]] = setmetatable({}, mt) end
x = nil
local k = 1
for j = 1,100 do
local n = {}; local nk = k%10 + 1
a[a[K][nk]][n] = {x, k = k}; x = n; k = nk
end
GC()
local n = x
local i = 0
while n do local t = a[a[K][k]][n]; n = t[1]; k = t.k; i = i + 1 end
assert(i == 100)
K = nil
GC()
-- assert(next(a) == nil)
-- testing errors during GC
if T then
collectgarbage("stop") -- stop collection
local u = {}
local s = {}; setmetatable(s, {__mode = 'k'})
setmetatable(u, {__gc = function (o)
local i = s[o]
s[i] = true
assert(not s[i - 1]) -- check proper finalization order
if i == 8 then error("@expected@") end -- error during GC
end})
for i = 6, 10 do
local n = setmetatable({}, getmetatable(u))
s[n] = i
end
warn("@on"); warn("@store")
collectgarbage()
assert(string.find(_WARN, "error in __gc"))
assert(string.match(_WARN, "@(.-)@") == "expected"); _WARN = false
for i = 8, 10 do assert(s[i]) end
for i = 1, 5 do
local n = setmetatable({}, getmetatable(u))
s[n] = i
end
collectgarbage()
for i = 1, 10 do assert(s[i]) end
getmetatable(u).__gc = nil
warn("@normal")
end
print '+'
-- testing userdata
if T==nil then
(Message or print)('\n >>> testC not active: skipping userdata GC tests <<<\n')
else
local function newproxy(u)
return debug.setmetatable(T.newuserdata(0), debug.getmetatable(u))
end
collectgarbage("stop") -- stop collection
local u = newproxy(nil)
debug.setmetatable(u, {__gc = true})
local s = 0
local a = {[u] = 0}; setmetatable(a, {__mode = 'vk'})
for i=1,10 do a[newproxy(u)] = i end
for k in pairs(a) do assert(getmetatable(k) == getmetatable(u)) end
local a1 = {}; for k,v in pairs(a) do a1[k] = v end
for k,v in pairs(a1) do a[v] = k end
for i =1,10 do assert(a[i]) end
getmetatable(u).a = a1
getmetatable(u).u = u
do
local u = u
getmetatable(u).__gc = function (o)
assert(a[o] == 10-s)
assert(a[10-s] == undef) -- udata already removed from weak table
assert(getmetatable(o) == getmetatable(u))
assert(getmetatable(o).a[o] == 10-s)
s=s+1
end
end
a1, u = nil
assert(next(a) ~= nil)
collectgarbage()
assert(s==11)
collectgarbage()
assert(next(a) == nil) -- finalized keys are removed in two cycles
end
-- __gc x weak tables
local u = setmetatable({}, {__gc = true})
-- __gc metamethod should be collected before running
setmetatable(getmetatable(u), {__mode = "v"})
getmetatable(u).__gc = function (o) os.exit(1) end -- cannot happen
u = nil
collectgarbage()
local u = setmetatable({}, {__gc = true})
local m = getmetatable(u)
m.x = {[{0}] = 1; [0] = {1}}; setmetatable(m.x, {__mode = "kv"});
m.__gc = function (o)
assert(next(getmetatable(o).x) == nil)
m = 10
end
u, m = nil
collectgarbage()
assert(m==10)
do -- tests for string keys in weak tables
collectgarbage(); collectgarbage()
local m = collectgarbage("count") -- current memory
local a = setmetatable({}, {__mode = "kv"})
a[string.rep("a", 2^22)] = 25 -- long string key -> number value
a[string.rep("b", 2^22)] = {} -- long string key -> colectable value
a[{}] = 14 -- colectable key
assert(collectgarbage("count") > m + 2^13) -- 2^13 == 2 * 2^22 in KB
collectgarbage()
assert(collectgarbage("count") >= m + 2^12 and
collectgarbage("count") < m + 2^13) -- one key was collected
local k, v = next(a) -- string key with number value preserved
assert(k == string.rep("a", 2^22) and v == 25)
assert(next(a, k) == nil) -- everything else cleared
assert(a[string.rep("b", 2^22)] == undef)
a[k] = undef -- erase this last entry
k = nil
collectgarbage()
assert(next(a) == nil)
-- make sure will not try to compare with dead key
assert(a[string.rep("b", 100)] == undef)
assert(collectgarbage("count") <= m + 1) -- eveything collected
end
-- errors during collection
if T then
warn("@store")
u = setmetatable({}, {__gc = function () error "@expected error" end})
u = nil
collectgarbage()
assert(string.find(_WARN, "@expected error")); _WARN = false
warn("@normal")
end
if not _soft then
print("long list")
local a = {}
for i = 1,200000 do
a = {next = a}
end
a = nil
collectgarbage()
end
-- create many threads with self-references and open upvalues
print("self-referenced threads")
local thread_id = 0
local threads = {}
local function fn (thread)
local x = {}
threads[thread_id] = function()
thread = x
end
coroutine.yield()
end
while thread_id < 1000 do
local thread = coroutine.create(fn)
coroutine.resume(thread, thread)
thread_id = thread_id + 1
end
-- Create a closure (function inside 'f') with an upvalue ('param') that
-- points (through a table) to the closure itself and to the thread
-- ('co' and the initial value of 'param') where closure is running.
-- Then, assert that table (and therefore everything else) will be
-- collected.
do
local collected = false -- to detect collection
collectgarbage(); collectgarbage("stop")
do
local function f (param)
;(function ()
assert(type(f) == 'function' and type(param) == 'thread')
param = {param, f}
setmetatable(param, {__gc = function () collected = true end})
coroutine.yield(100)
end)()
end
local co = coroutine.create(f)
assert(coroutine.resume(co, co))
end
-- Now, thread and closure are not reacheable any more.
collectgarbage()
assert(collected)
collectgarbage("restart")
end
do
collectgarbage()
collectgarbage"stop"
collectgarbage("step", 0) -- steps should not unblock the collector
local x = gcinfo()
repeat
for i=1,1000 do _ENV.a = {} end -- no collection during the loop
until gcinfo() > 2 * x
collectgarbage"restart"
_ENV.a = nil
end
if T then -- tests for weird cases collecting upvalues
local function foo ()
local a = {x = 20}
coroutine.yield(function () return a.x end) -- will run collector
assert(a.x == 20) -- 'a' is 'ok'
a = {x = 30} -- create a new object
assert(T.gccolor(a) == "white") -- of course it is new...
coroutine.yield(100) -- 'a' is still local to this thread
end
local t = setmetatable({}, {__mode = "kv"})
collectgarbage(); collectgarbage('stop')
-- create coroutine in a weak table, so it will never be marked
t.co = coroutine.wrap(foo)
local f = t.co() -- create function to access local 'a'
T.gcstate("atomic") -- ensure all objects are traversed
assert(T.gcstate() == "atomic")
assert(t.co() == 100) -- resume coroutine, creating new table for 'a'
assert(T.gccolor(t.co) == "white") -- thread was not traversed
T.gcstate("pause") -- collect thread, but should mark 'a' before that
assert(t.co == nil and f() == 30) -- ensure correct access to 'a'
collectgarbage("restart")
-- test barrier in sweep phase (backing userdata to gray)
local u = T.newuserdata(0, 1) -- create a userdata
collectgarbage()
collectgarbage"stop"
local a = {} -- avoid 'u' as first element in 'allgc'
T.gcstate"atomic"
T.gcstate"sweepallgc"
local x = {}
assert(T.gccolor(u) == "black") -- userdata is "old" (black)
assert(T.gccolor(x) == "white") -- table is "new" (white)
debug.setuservalue(u, x) -- trigger barrier
assert(T.gccolor(u) == "gray") -- userdata changed back to gray
collectgarbage"restart"
print"+"
end
if T then
local debug = require "debug"
collectgarbage("stop")
local x = T.newuserdata(0)
local y = T.newuserdata(0)
debug.setmetatable(y, {__gc = nop}) -- bless the new udata before...
debug.setmetatable(x, {__gc = nop}) -- ...the old one
assert(T.gccolor(y) == "white")
T.checkmemory()
collectgarbage("restart")
end
if T then
print("emergency collections")
collectgarbage()
collectgarbage()
T.totalmem(T.totalmem() + 200)
for i=1,200 do local a = {} end
T.totalmem(0)
collectgarbage()
local t = T.totalmem("table")
local a = {{}, {}, {}} -- create 4 new tables
assert(T.totalmem("table") == t + 4)
t = T.totalmem("function")
a = function () end -- create 1 new closure
assert(T.totalmem("function") == t + 1)
t = T.totalmem("thread")
a = coroutine.create(function () end) -- create 1 new coroutine
assert(T.totalmem("thread") == t + 1)
end
-- create an object to be collected when state is closed
do
local setmetatable,assert,type,print,getmetatable =
setmetatable,assert,type,print,getmetatable
local tt = {}
tt.__gc = function (o)
assert(getmetatable(o) == tt)
-- create new objects during GC
local a = 'xuxu'..(10+3)..'joao', {}
___Glob = o -- ressurrect object!
setmetatable({}, tt) -- creates a new one with same metatable
print(">>> closing state " .. "<<<\n")
end
local u = setmetatable({}, tt)
___Glob = {u} -- avoid object being collected before program end
end
-- create several objects to raise errors when collected while closing state
if T then
local error, assert, find, warn = error, assert, string.find, warn
local n = 0
local lastmsg
local mt = {__gc = function (o)
n = n + 1
assert(n == o[1])
if n == 1 then
_WARN = false
elseif n == 2 then
assert(find(_WARN, "@expected warning"))
lastmsg = _WARN -- get message from previous error (first 'o')
else
assert(lastmsg == _WARN) -- subsequent error messages are equal
end
warn("@store"); _WARN = false
error"@expected warning"
end}
for i = 10, 1, -1 do
-- create object and preserve it until the end
table.insert(___Glob, setmetatable({i}, mt))
end
end
-- just to make sure
assert(collectgarbage'isrunning')
do -- check that the collector is not reentrant in incremental mode
local res = true
setmetatable({}, {__gc = function ()
res = collectgarbage()
end})
collectgarbage()
assert(not res)
end
collectgarbage(oldmode)
print('OK')

172
lua-5.4.7-tests/gengc.lua Normal file
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@ -0,0 +1,172 @@
-- $Id: testes/gengc.lua $
-- See Copyright Notice in file all.lua
print('testing generational garbage collection')
local debug = require"debug"
assert(collectgarbage("isrunning"))
collectgarbage()
local oldmode = collectgarbage("generational")
-- ensure that table barrier evolves correctly
do
local U = {}
-- full collection makes 'U' old
collectgarbage()
assert(not T or T.gcage(U) == "old")
-- U refers to a new table, so it becomes 'touched1'
U[1] = {x = {234}}
assert(not T or (T.gcage(U) == "touched1" and T.gcage(U[1]) == "new"))
-- both U and the table survive one more collection
collectgarbage("step", 0)
assert(not T or (T.gcage(U) == "touched2" and T.gcage(U[1]) == "survival"))
-- both U and the table survive yet another collection
-- now everything is old
collectgarbage("step", 0)
assert(not T or (T.gcage(U) == "old" and T.gcage(U[1]) == "old1"))
-- data was not corrupted
assert(U[1].x[1] == 234)
end
do
-- ensure that 'firstold1' is corrected when object is removed from
-- the 'allgc' list
local function foo () end
local old = {10}
collectgarbage() -- make 'old' old
assert(not T or T.gcage(old) == "old")
setmetatable(old, {}) -- new table becomes OLD0 (barrier)
assert(not T or T.gcage(getmetatable(old)) == "old0")
collectgarbage("step", 0) -- new table becomes OLD1 and firstold1
assert(not T or T.gcage(getmetatable(old)) == "old1")
setmetatable(getmetatable(old), {__gc = foo}) -- get it out of allgc list
collectgarbage("step", 0) -- should not seg. fault
end
do -- bug in 5.4.0
-- When an object aged OLD1 is finalized, it is moved from the list
-- 'finobj' to the *beginning* of the list 'allgc', but that part of the
-- list was not being visited by 'markold'.
local A = {}
A[1] = false -- old anchor for object
-- obj finalizer
local function gcf (obj)
A[1] = obj -- anchor object
assert(not T or T.gcage(obj) == "old1")
obj = nil -- remove it from the stack
collectgarbage("step", 0) -- do a young collection
print(getmetatable(A[1]).x) -- metatable was collected
end
collectgarbage() -- make A old
local obj = {} -- create a new object
collectgarbage("step", 0) -- make it a survival
assert(not T or T.gcage(obj) == "survival")
setmetatable(obj, {__gc = gcf, x = "+"}) -- create its metatable
assert(not T or T.gcage(getmetatable(obj)) == "new")
obj = nil -- clear object
collectgarbage("step", 0) -- will call obj's finalizer
end
do -- another bug in 5.4.0
local old = {10}
collectgarbage() -- make 'old' old
local co = coroutine.create(
function ()
local x = nil
local f = function ()
return x[1]
end
x = coroutine.yield(f)
coroutine.yield()
end
)
local _, f = coroutine.resume(co) -- create closure over 'x' in coroutine
collectgarbage("step", 0) -- make upvalue a survival
old[1] = {"hello"} -- 'old' go to grayagain as 'touched1'
coroutine.resume(co, {123}) -- its value will be new
co = nil
collectgarbage("step", 0) -- hit the barrier
assert(f() == 123 and old[1][1] == "hello")
collectgarbage("step", 0) -- run the collector once more
-- make sure old[1] was not collected
assert(f() == 123 and old[1][1] == "hello")
end
do -- bug introduced in commit 9cf3299fa
local t = setmetatable({}, {__mode = "kv"}) -- all-weak table
collectgarbage() -- full collection
assert(not T or T.gcage(t) == "old")
t[1] = {10}
assert(not T or (T.gcage(t) == "touched1" and T.gccolor(t) == "gray"))
collectgarbage("step", 0) -- minor collection
assert(not T or (T.gcage(t) == "touched2" and T.gccolor(t) == "black"))
collectgarbage("step", 0) -- minor collection
assert(not T or T.gcage(t) == "old") -- t should be black, but it was gray
t[1] = {10} -- no barrier here, so t was still old
collectgarbage("step", 0) -- minor collection
-- t, being old, is ignored by the collection, so it is not cleared
assert(t[1] == nil) -- fails with the bug
end
if T == nil then
(Message or print)('\n >>> testC not active: \z
skipping some generational tests <<<\n')
print 'OK'
return
end
-- ensure that userdata barrier evolves correctly
do
local U = T.newuserdata(0, 1)
-- full collection makes 'U' old
collectgarbage()
assert(T.gcage(U) == "old")
-- U refers to a new table, so it becomes 'touched1'
debug.setuservalue(U, {x = {234}})
assert(T.gcage(U) == "touched1" and
T.gcage(debug.getuservalue(U)) == "new")
-- both U and the table survive one more collection
collectgarbage("step", 0)
assert(T.gcage(U) == "touched2" and
T.gcage(debug.getuservalue(U)) == "survival")
-- both U and the table survive yet another collection
-- now everything is old
collectgarbage("step", 0)
assert(T.gcage(U) == "old" and
T.gcage(debug.getuservalue(U)) == "old1")
-- data was not corrupted
assert(debug.getuservalue(U).x[1] == 234)
end
-- just to make sure
assert(collectgarbage'isrunning')
-- just to make sure
assert(collectgarbage'isrunning')
collectgarbage(oldmode)
print('OK')

271
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-- $Id: testes/goto.lua $
-- See Copyright Notice in file all.lua
collectgarbage()
local function errmsg (code, m)
local st, msg = load(code)
assert(not st and string.find(msg, m))
end
-- cannot see label inside block
errmsg([[ goto l1; do ::l1:: end ]], "label 'l1'")
errmsg([[ do ::l1:: end goto l1; ]], "label 'l1'")
-- repeated label
errmsg([[ ::l1:: ::l1:: ]], "label 'l1'")
errmsg([[ ::l1:: do ::l1:: end]], "label 'l1'")
-- undefined label
errmsg([[ goto l1; local aa ::l1:: ::l2:: print(3) ]], "local 'aa'")
-- jumping over variable definition
errmsg([[
do local bb, cc; goto l1; end
local aa
::l1:: print(3)
]], "local 'aa'")
-- jumping into a block
errmsg([[ do ::l1:: end goto l1 ]], "label 'l1'")
errmsg([[ goto l1 do ::l1:: end ]], "label 'l1'")
-- cannot continue a repeat-until with variables
errmsg([[
repeat
if x then goto cont end
local xuxu = 10
::cont::
until xuxu < x
]], "local 'xuxu'")
-- simple gotos
local x
do
local y = 12
goto l1
::l2:: x = x + 1; goto l3
::l1:: x = y; goto l2
end
::l3:: ::l3_1:: assert(x == 13)
-- long labels
do
local prog = [[
do
local a = 1
goto l%sa; a = a + 1
::l%sa:: a = a + 10
goto l%sb; a = a + 2
::l%sb:: a = a + 20
return a
end
]]
local label = string.rep("0123456789", 40)
prog = string.format(prog, label, label, label, label)
assert(assert(load(prog))() == 31)
end
-- ok to jump over local dec. to end of block
do
goto l1
local a = 23
x = a
::l1::;
end
while true do
goto l4
goto l1 -- ok to jump over local dec. to end of block
goto l1 -- multiple uses of same label
local x = 45
::l1:: ;;;
end
::l4:: assert(x == 13)
if print then
goto l1 -- ok to jump over local dec. to end of block
error("should not be here")
goto l2 -- ok to jump over local dec. to end of block
local x
::l1:: ; ::l2:: ;;
else end
-- to repeat a label in a different function is OK
local function foo ()
local a = {}
goto l3
::l1:: a[#a + 1] = 1; goto l2;
::l2:: a[#a + 1] = 2; goto l5;
::l3::
::l3a:: a[#a + 1] = 3; goto l1;
::l4:: a[#a + 1] = 4; goto l6;
::l5:: a[#a + 1] = 5; goto l4;
::l6:: assert(a[1] == 3 and a[2] == 1 and a[3] == 2 and
a[4] == 5 and a[5] == 4)
if not a[6] then a[6] = true; goto l3a end -- do it twice
end
::l6:: foo()
do -- bug in 5.2 -> 5.3.2
local x
::L1::
local y -- cannot join this SETNIL with previous one
assert(y == nil)
y = true
if x == nil then
x = 1
goto L1
else
x = x + 1
end
assert(x == 2 and y == true)
end
-- bug in 5.3
do
local first = true
local a = false
if true then
goto LBL
::loop::
a = true
::LBL::
if first then
first = false
goto loop
end
end
assert(a)
end
do -- compiling infinite loops
goto escape -- do not run the infinite loops
::a:: goto a
::b:: goto c
::c:: goto b
end
::escape::
--------------------------------------------------------------------------------
-- testing closing of upvalues
local debug = require 'debug'
local function foo ()
local t = {}
do
local i = 1
local a, b, c, d
t[1] = function () return a, b, c, d end
::l1::
local b
do
local c
t[#t + 1] = function () return a, b, c, d end -- t[2], t[4], t[6]
if i > 2 then goto l2 end
do
local d
t[#t + 1] = function () return a, b, c, d end -- t[3], t[5]
i = i + 1
local a
goto l1
end
end
end
::l2:: return t
end
local a = foo()
assert(#a == 6)
-- all functions share same 'a'
for i = 2, 6 do
assert(debug.upvalueid(a[1], 1) == debug.upvalueid(a[i], 1))
end
-- 'b' and 'c' are shared among some of them
for i = 2, 6 do
-- only a[1] uses external 'b'/'b'
assert(debug.upvalueid(a[1], 2) ~= debug.upvalueid(a[i], 2))
assert(debug.upvalueid(a[1], 3) ~= debug.upvalueid(a[i], 3))
end
for i = 3, 5, 2 do
-- inner functions share 'b'/'c' with previous ones
assert(debug.upvalueid(a[i], 2) == debug.upvalueid(a[i - 1], 2))
assert(debug.upvalueid(a[i], 3) == debug.upvalueid(a[i - 1], 3))
-- but not with next ones
assert(debug.upvalueid(a[i], 2) ~= debug.upvalueid(a[i + 1], 2))
assert(debug.upvalueid(a[i], 3) ~= debug.upvalueid(a[i + 1], 3))
end
-- only external 'd' is shared
for i = 2, 6, 2 do
assert(debug.upvalueid(a[1], 4) == debug.upvalueid(a[i], 4))
end
-- internal 'd's are all different
for i = 3, 5, 2 do
for j = 1, 6 do
assert((debug.upvalueid(a[i], 4) == debug.upvalueid(a[j], 4))
== (i == j))
end
end
--------------------------------------------------------------------------------
-- testing if x goto optimizations
local function testG (a)
if a == 1 then
goto l1
error("should never be here!")
elseif a == 2 then goto l2
elseif a == 3 then goto l3
elseif a == 4 then
goto l1 -- go to inside the block
error("should never be here!")
::l1:: a = a + 1 -- must go to 'if' end
else
goto l4
::l4a:: a = a * 2; goto l4b
error("should never be here!")
::l4:: goto l4a
error("should never be here!")
::l4b::
end
do return a end
::l2:: do return "2" end
::l3:: do return "3" end
::l1:: return "1"
end
assert(testG(1) == "1")
assert(testG(2) == "2")
assert(testG(3) == "3")
assert(testG(4) == 5)
assert(testG(5) == 10)
do
-- if x back goto out of scope of upvalue
local X
goto L1
::L2:: goto L3
::L1:: do
local a <close> = setmetatable({}, {__close = function () X = true end})
assert(X == nil)
if a then goto L2 end -- jumping back out of scope of 'a'
end
::L3:: assert(X == true) -- checks that 'a' was correctly closed
end
--------------------------------------------------------------------------------
print'OK'

173
lua-5.4.7-tests/heavy.lua Normal file
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-- $Id: heavy.lua,v 1.7 2017/12/29 15:42:15 roberto Exp $
-- See Copyright Notice in file all.lua
local function teststring ()
print("creating a string too long")
do
local a = "x"
local st, msg = pcall(function ()
while true do
a = a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
.. a .. a.. a.. a.. a.. a.. a.. a.. a.. a
print(string.format("string with %d bytes", #a))
end
end)
assert(not st and
(string.find(msg, "string length overflow") or
string.find(msg, "not enough memory")))
print("string length overflow with " .. #a * 100)
end
print('+')
end
local function loadrep (x, what)
local p = 1<<20
local s = string.rep(x, p)
local count = 0
local function f()
count = count + p
if count % (0x80*p) == 0 then
io.stderr:write("(", count // 2^20, " M)")
end
return s
end
local st, msg = load(f, "=big")
print("\nmemory: ", collectgarbage'count' * 1024)
msg = string.match(msg, "^[^\n]+") -- get only first line
print(string.format("total: 0x%x %s ('%s')", count, what, msg))
return st, msg
end
function controlstruct ()
print("control structure too long")
local lim = ((1 << 24) - 2) // 3
local s = string.rep("a = a + 1\n", lim)
s = "while true do " .. s .. "end"
assert(load(s))
print("ok with " .. lim .. " lines")
lim = lim + 3
s = string.rep("a = a + 1\n", lim)
s = "while true do " .. s .. "end"
local st, msg = load(s)
assert(not st and string.find(msg, "too long"))
print(msg)
end
function manylines ()
print("loading chunk with too many lines")
local st, msg = loadrep("\n", "lines")
assert(not st and string.find(msg, "too many lines"))
print('+')
end
function hugeid ()
print("loading chunk with huge identifier")
local st, msg = loadrep("a", "chars")
assert(not st and
(string.find(msg, "lexical element too long") or
string.find(msg, "not enough memory")))
print('+')
end
function toomanyinst ()
print("loading chunk with too many instructions")
local st, msg = loadrep("a = 10; ", "instructions")
print('+')
end
local function loadrepfunc (prefix, f)
local count = -1
local function aux ()
count = count + 1
if count == 0 then
return prefix
else
if count % (0x100000) == 0 then
io.stderr:write("(", count // 2^20, " M)")
end
return f(count)
end
end
local st, msg = load(aux, "k")
print("\nmemory: ", collectgarbage'count' * 1024)
msg = string.match(msg, "^[^\n]+") -- get only first line
print("expected error: ", msg)
end
function toomanyconst ()
print("loading function with too many constants")
loadrepfunc("function foo () return {0,",
function (n)
-- convert 'n' to a string in the format [["...",]],
-- where '...' is a kind of number in base 128
-- (in a range that does not include either the double quote
-- and the escape.)
return string.char(34,
((n // 128^0) & 127) + 128,
((n // 128^1) & 127) + 128,
((n // 128^2) & 127) + 128,
((n // 128^3) & 127) + 128,
((n // 128^4) & 127) + 128,
34, 44)
end)
end
function toomanystr ()
local a = {}
local st, msg = pcall(function ()
for i = 1, math.huge do
if i % (0x100000) == 0 then
io.stderr:write("(", i // 2^20, " M)")
end
a[i] = string.pack("I", i)
end
end)
local size = #a
a = collectgarbage'count'
print("\nmemory:", a * 1024)
print("expected error:", msg)
print("size:", size)
end
function toomanyidx ()
local a = {}
local st, msg = pcall(function ()
for i = 1, math.huge do
if i % (0x100000) == 0 then
io.stderr:write("(", i // 2^20, " M)")
end
a[i] = i
end
end)
print("\nmemory: ", collectgarbage'count' * 1024)
print("expected error: ", msg)
print("size:", #a)
end
-- teststring()
-- controlstruct()
-- manylines()
-- hugeid()
-- toomanyinst()
-- toomanyconst()
-- toomanystr()
toomanyidx()
print "OK"

44
lua-5.4.7-tests/libs/lib1.c Normal file
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#include "lua.h"
#include "lauxlib.h"
static int id (lua_State *L) {
return lua_gettop(L);
}
static const struct luaL_Reg funcs[] = {
{"id", id},
{NULL, NULL}
};
/* function used by lib11.c */
LUAMOD_API int lib1_export (lua_State *L) {
lua_pushstring(L, "exported");
return 1;
}
LUAMOD_API int onefunction (lua_State *L) {
luaL_checkversion(L);
lua_settop(L, 2);
lua_pushvalue(L, 1);
return 2;
}
LUAMOD_API int anotherfunc (lua_State *L) {
luaL_checkversion(L);
lua_pushfstring(L, "%d%%%d\n", (int)lua_tointeger(L, 1),
(int)lua_tointeger(L, 2));
return 1;
}
LUAMOD_API int luaopen_lib1_sub (lua_State *L) {
lua_setglobal(L, "y"); /* 2nd arg: extra value (file name) */
lua_setglobal(L, "x"); /* 1st arg: module name */
luaL_newlib(L, funcs);
return 1;
}

10
lua-5.4.7-tests/libs/lib11.c Normal file
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#include "lua.h"
/* function from lib1.c */
int lib1_export (lua_State *L);
LUAMOD_API int luaopen_lib11 (lua_State *L) {
return lib1_export(L);
}

23
lua-5.4.7-tests/libs/lib2.c Normal file
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#include "lua.h"
#include "lauxlib.h"
static int id (lua_State *L) {
return lua_gettop(L);
}
static const struct luaL_Reg funcs[] = {
{"id", id},
{NULL, NULL}
};
LUAMOD_API int luaopen_lib2 (lua_State *L) {
lua_settop(L, 2);
lua_setglobal(L, "y"); /* y gets 2nd parameter */
lua_setglobal(L, "x"); /* x gets 1st parameter */
luaL_newlib(L, funcs);
return 1;
}

10
lua-5.4.7-tests/libs/lib21.c Normal file
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#include "lua.h"
int luaopen_lib2 (lua_State *L);
LUAMOD_API int luaopen_lib21 (lua_State *L) {
return luaopen_lib2(L);
}

25
lua-5.4.7-tests/libs/lib22.c Normal file
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#include "lua.h"
#include "lauxlib.h"
static int id (lua_State *L) {
lua_pushboolean(L, 1);
lua_insert(L, 1);
return lua_gettop(L);
}
static const struct luaL_Reg funcs[] = {
{"id", id},
{NULL, NULL}
};
LUAMOD_API int luaopen_lib2 (lua_State *L) {
lua_settop(L, 2);
lua_setglobal(L, "y"); /* y gets 2nd parameter */
lua_setglobal(L, "x"); /* x gets 1st parameter */
luaL_newlib(L, funcs);
return 1;
}

27
lua-5.4.7-tests/libs/makefile Normal file
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# change this variable to point to the directory with Lua headers
# of the version being tested
LUA_DIR = ../../
CC = gcc
# compilation should generate Dynamic-Link Libraries
CFLAGS = -Wall -std=gnu99 -O2 -I$(LUA_DIR) -fPIC -shared
# libraries used by the tests
all: lib1.so lib11.so lib2.so lib21.so lib2-v2.so
touch all
lib1.so: lib1.c $(LUA_DIR)/luaconf.h $(LUA_DIR)/lua.h
$(CC) $(CFLAGS) -o lib1.so lib1.c
lib11.so: lib11.c $(LUA_DIR)/luaconf.h $(LUA_DIR)/lua.h
$(CC) $(CFLAGS) -o lib11.so lib11.c
lib2.so: lib2.c $(LUA_DIR)/luaconf.h $(LUA_DIR)/lua.h
$(CC) $(CFLAGS) -o lib2.so lib2.c
lib21.so: lib21.c $(LUA_DIR)/luaconf.h $(LUA_DIR)/lua.h
$(CC) $(CFLAGS) -o lib21.so lib21.c
lib2-v2.so: lib21.c $(LUA_DIR)/luaconf.h $(LUA_DIR)/lua.h
$(CC) $(CFLAGS) -o lib2-v2.so lib22.c

343
lua-5.4.7-tests/literals.lua Normal file
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-- $Id: testes/literals.lua $
-- See Copyright Notice in file all.lua
print('testing scanner')
local debug = require "debug"
local function dostring (x) return assert(load(x), "")() end
dostring("x \v\f = \t\r 'a\0a' \v\f\f")
assert(x == 'a\0a' and string.len(x) == 3)
_G.x = nil
-- escape sequences
assert('\n\"\'\\' == [[
"'\]])
assert(string.find("\a\b\f\n\r\t\v", "^%c%c%c%c%c%c%c$"))
-- assume ASCII just for tests:
assert("\09912" == 'c12')
assert("\99ab" == 'cab')
assert("\099" == '\99')
assert("\099\n" == 'c\10')
assert('\0\0\0alo' == '\0' .. '\0\0' .. 'alo')
assert(010 .. 020 .. -030 == "1020-30")
-- hexadecimal escapes
assert("\x00\x05\x10\x1f\x3C\xfF\xe8" == "\0\5\16\31\60\255\232")
local function lexstring (x, y, n)
local f = assert(load('return ' .. x ..
', require"debug".getinfo(1).currentline', ''))
local s, l = f()
assert(s == y and l == n)
end
lexstring("'abc\\z \n efg'", "abcefg", 2)
lexstring("'abc\\z \n\n\n'", "abc", 4)
lexstring("'\\z \n\t\f\v\n'", "", 3)
lexstring("[[\nalo\nalo\n\n]]", "alo\nalo\n\n", 5)
lexstring("[[\nalo\ralo\n\n]]", "alo\nalo\n\n", 5)
lexstring("[[\nalo\ralo\r\n]]", "alo\nalo\n", 4)
lexstring("[[\ralo\n\ralo\r\n]]", "alo\nalo\n", 4)
lexstring("[[alo]\n]alo]]", "alo]\n]alo", 2)
assert("abc\z
def\z
ghi\z
" == 'abcdefghi')
-- UTF-8 sequences
assert("\u{0}\u{00000000}\x00\0" == string.char(0, 0, 0, 0))
-- limits for 1-byte sequences
assert("\u{0}\u{7F}" == "\x00\x7F")
-- limits for 2-byte sequences
assert("\u{80}\u{7FF}" == "\xC2\x80\xDF\xBF")
-- limits for 3-byte sequences
assert("\u{800}\u{FFFF}" == "\xE0\xA0\x80\xEF\xBF\xBF")
-- limits for 4-byte sequences
assert("\u{10000}\u{1FFFFF}" == "\xF0\x90\x80\x80\xF7\xBF\xBF\xBF")
-- limits for 5-byte sequences
assert("\u{200000}\u{3FFFFFF}" == "\xF8\x88\x80\x80\x80\xFB\xBF\xBF\xBF\xBF")
-- limits for 6-byte sequences
assert("\u{4000000}\u{7FFFFFFF}" ==
"\xFC\x84\x80\x80\x80\x80\xFD\xBF\xBF\xBF\xBF\xBF")
-- Error in escape sequences
local function lexerror (s, err)
local st, msg = load('return ' .. s, '')
if err ~= '<eof>' then err = err .. "'" end
assert(not st and string.find(msg, "near .-" .. err))
end
lexerror([["abc\x"]], [[\x"]])
lexerror([["abc\x]], [[\x]])
lexerror([["\x]], [[\x]])
lexerror([["\x5"]], [[\x5"]])
lexerror([["\x5]], [[\x5]])
lexerror([["\xr"]], [[\xr]])
lexerror([["\xr]], [[\xr]])
lexerror([["\x.]], [[\x.]])
lexerror([["\x8%"]], [[\x8%%]])
lexerror([["\xAG]], [[\xAG]])
lexerror([["\g"]], [[\g]])
lexerror([["\g]], [[\g]])
lexerror([["\."]], [[\%.]])
lexerror([["\999"]], [[\999"]])
lexerror([["xyz\300"]], [[\300"]])
lexerror([[" \256"]], [[\256"]])
-- errors in UTF-8 sequences
lexerror([["abc\u{100000000}"]], [[abc\u{100000000]]) -- too large
lexerror([["abc\u11r"]], [[abc\u1]]) -- missing '{'
lexerror([["abc\u"]], [[abc\u"]]) -- missing '{'
lexerror([["abc\u{11r"]], [[abc\u{11r]]) -- missing '}'
lexerror([["abc\u{11"]], [[abc\u{11"]]) -- missing '}'
lexerror([["abc\u{11]], [[abc\u{11]]) -- missing '}'
lexerror([["abc\u{r"]], [[abc\u{r]]) -- no digits
-- unfinished strings
lexerror("[=[alo]]", "<eof>")
lexerror("[=[alo]=", "<eof>")
lexerror("[=[alo]", "<eof>")
lexerror("'alo", "<eof>")
lexerror("'alo \\z \n\n", "<eof>")
lexerror("'alo \\z", "<eof>")
lexerror([['alo \98]], "<eof>")
-- valid characters in variable names
for i = 0, 255 do
local s = string.char(i)
assert(not string.find(s, "[a-zA-Z_]") == not load(s .. "=1", ""))
assert(not string.find(s, "[a-zA-Z_0-9]") ==
not load("a" .. s .. "1 = 1", ""))
end
-- long variable names
local var1 = string.rep('a', 15000) .. '1'
local var2 = string.rep('a', 15000) .. '2'
local prog = string.format([[
%s = 5
%s = %s + 1
return function () return %s - %s end
]], var1, var2, var1, var1, var2)
local f = dostring(prog)
assert(_G[var1] == 5 and _G[var2] == 6 and f() == -1)
_G[var1], _G[var2] = nil
print('+')
-- escapes --
assert("\n\t" == [[
]])
assert([[
$debug]] == "\n $debug")
assert([[ [ ]] ~= [[ ] ]])
-- long strings --
local b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
assert(string.len(b) == 960)
prog = [=[
print('+')
local a1 = [["this is a 'string' with several 'quotes'"]]
local a2 = "'quotes'"
assert(string.find(a1, a2) == 34)
print('+')
a1 = [==[temp = [[an arbitrary value]]; ]==]
assert(load(a1))()
assert(temp == 'an arbitrary value')
_G.temp = nil
-- long strings --
local b = "001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789001234567890123456789012345678901234567891234567890123456789012345678901234567890012345678901234567890123456789012345678912345678901234567890123456789012345678900123456789012345678901234567890123456789123456789012345678901234567890123456789"
assert(string.len(b) == 960)
print('+')
local a = [[00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
00123456789012345678901234567890123456789123456789012345678901234567890123456789
]]
assert(string.len(a) == 1863)
assert(string.sub(a, 1, 40) == string.sub(b, 1, 40))
x = 1
]=]
print('+')
_G.x = nil
dostring(prog)
assert(x)
_G.x = nil
do -- reuse of long strings
-- get the address of a string
local function getadd (s) return string.format("%p", s) end
local s1 <const> = "01234567890123456789012345678901234567890123456789"
local s2 <const> = "01234567890123456789012345678901234567890123456789"
local s3 = "01234567890123456789012345678901234567890123456789"
local function foo() return s1 end
local function foo1() return s3 end
local function foo2()
return "01234567890123456789012345678901234567890123456789"
end
local a1 = getadd(s1)
assert(a1 == getadd(s2))
assert(a1 == getadd(foo()))
assert(a1 == getadd(foo1()))
assert(a1 == getadd(foo2()))
local sd = "0123456789" .. "0123456789012345678901234567890123456789"
assert(sd == s1 and getadd(sd) ~= a1)
end
-- testing line ends
prog = [[
local a = 1 -- a comment
local b = 2
x = [=[
hi
]=]
y = "\
hello\r\n\
"
return require"debug".getinfo(1).currentline
]]
for _, n in pairs{"\n", "\r", "\n\r", "\r\n"} do
local prog, nn = string.gsub(prog, "\n", n)
assert(dostring(prog) == nn)
assert(_G.x == "hi\n" and _G.y == "\nhello\r\n\n")
end
_G.x, _G.y = nil
-- testing comments and strings with long brackets
local a = [==[]=]==]
assert(a == "]=")
a = [==[[===[[=[]]=][====[]]===]===]==]
assert(a == "[===[[=[]]=][====[]]===]===")
a = [====[[===[[=[]]=][====[]]===]===]====]
assert(a == "[===[[=[]]=][====[]]===]===")
a = [=[]]]]]]]]]=]
assert(a == "]]]]]]]]")
--[===[
x y z [==[ blu foo
]==
]
]=]==]
error error]=]===]
-- generate all strings of four of these chars
local x = {"=", "[", "]", "\n"}
local len = 4
local function gen (c, n)
if n==0 then coroutine.yield(c)
else
for _, a in pairs(x) do
gen(c..a, n-1)
end
end
end
for s in coroutine.wrap(function () gen("", len) end) do
assert(s == load("return [====[\n"..s.."]====]", "")())
end
-- testing decimal point locale
if os.setlocale("pt_BR") or os.setlocale("ptb") then
assert(tonumber("3,4") == 3.4 and tonumber"3.4" == 3.4)
assert(tonumber(" -.4 ") == -0.4)
assert(tonumber(" +0x.41 ") == 0X0.41)
assert(not load("a = (3,4)"))
assert(assert(load("return 3.4"))() == 3.4)
assert(assert(load("return .4,3"))() == .4)
assert(assert(load("return 4."))() == 4.)
assert(assert(load("return 4.+.5"))() == 4.5)
assert(" 0x.1 " + " 0x,1" + "-0X.1\t" == 0x0.1)
assert(not tonumber"inf" and not tonumber"NAN")
assert(assert(load(string.format("return %q", 4.51)))() == 4.51)
local a,b = load("return 4.5.")
assert(string.find(b, "'4%.5%.'"))
assert(os.setlocale("C"))
else
(Message or print)(
'\n >>> pt_BR locale not available: skipping decimal point tests <<<\n')
end
-- testing %q x line ends
local s = "a string with \r and \n and \r\n and \n\r"
local c = string.format("return %q", s)
assert(assert(load(c))() == s)
-- testing errors
assert(not load"a = 'non-ending string")
assert(not load"a = 'non-ending string\n'")
assert(not load"a = '\\345'")
assert(not load"a = [=x]")
local function malformednum (n, exp)
local s, msg = load("return " .. n)
assert(not s and string.find(msg, exp))
end
malformednum("0xe-", "near <eof>")
malformednum("0xep-p", "malformed number")
malformednum("1print()", "malformed number")
print('OK')

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/*
** $Id: ltests.h $
** Internal Header for Debugging of the Lua Implementation
** See Copyright Notice in lua.h
*/
#ifndef ltests_h
#define ltests_h
#include <stdio.h>
#include <stdlib.h>
/* test Lua with compatibility code */
#define LUA_COMPAT_MATHLIB
#define LUA_COMPAT_LT_LE
#define LUA_DEBUG
/* turn on assertions */
#define LUAI_ASSERT
/* to avoid warnings, and to make sure value is really unused */
#define UNUSED(x) (x=0, (void)(x))
/* test for sizes in 'l_sprintf' (make sure whole buffer is available) */
#undef l_sprintf
#if !defined(LUA_USE_C89)
#define l_sprintf(s,sz,f,i) (memset(s,0xAB,sz), snprintf(s,sz,f,i))
#else
#define l_sprintf(s,sz,f,i) (memset(s,0xAB,sz), sprintf(s,f,i))
#endif
/* get a chance to test code without jump tables */
#define LUA_USE_JUMPTABLE 0
/* use 32-bit integers in random generator */
#define LUA_RAND32
/* memory-allocator control variables */
typedef struct Memcontrol {
int failnext;
unsigned long numblocks;
unsigned long total;
unsigned long maxmem;
unsigned long memlimit;
unsigned long countlimit;
unsigned long objcount[LUA_NUMTYPES];
} Memcontrol;
LUA_API Memcontrol l_memcontrol;
/*
** generic variable for debug tricks
*/
extern void *l_Trick;
/*
** Function to traverse and check all memory used by Lua
*/
LUAI_FUNC int lua_checkmemory (lua_State *L);
/*
** Function to print an object GC-friendly
*/
struct GCObject;
LUAI_FUNC void lua_printobj (lua_State *L, struct GCObject *o);
/* test for lock/unlock */
struct L_EXTRA { int lock; int *plock; };
#undef LUA_EXTRASPACE
#define LUA_EXTRASPACE sizeof(struct L_EXTRA)
#define getlock(l) cast(struct L_EXTRA*, lua_getextraspace(l))
#define luai_userstateopen(l) \
(getlock(l)->lock = 0, getlock(l)->plock = &(getlock(l)->lock))
#define luai_userstateclose(l) \
lua_assert(getlock(l)->lock == 1 && getlock(l)->plock == &(getlock(l)->lock))
#define luai_userstatethread(l,l1) \
lua_assert(getlock(l1)->plock == getlock(l)->plock)
#define luai_userstatefree(l,l1) \
lua_assert(getlock(l)->plock == getlock(l1)->plock)
#define lua_lock(l) lua_assert((*getlock(l)->plock)++ == 0)
#define lua_unlock(l) lua_assert(--(*getlock(l)->plock) == 0)
LUA_API int luaB_opentests (lua_State *L);
LUA_API void *debug_realloc (void *ud, void *block,
size_t osize, size_t nsize);
#if defined(lua_c)
#define luaL_newstate() lua_newstate(debug_realloc, &l_memcontrol)
#define luaL_openlibs(L) \
{ (luaL_openlibs)(L); \
luaL_requiref(L, "T", luaB_opentests, 1); \
lua_pop(L, 1); }
#endif
/* change some sizes to give some bugs a chance */
#undef LUAL_BUFFERSIZE
#define LUAL_BUFFERSIZE 23
#define MINSTRTABSIZE 2
#define MAXIWTHABS 3
#define STRCACHE_N 23
#define STRCACHE_M 5
#undef LUAI_USER_ALIGNMENT_T
#define LUAI_USER_ALIGNMENT_T union { char b[sizeof(void*) * 8]; }
/*
** This one is not compatible with tests for opcode optimizations,
** as it blocks some optimizations
#define MAXINDEXRK 0
*/
/* make stack-overflow tests run faster */
#undef LUAI_MAXSTACK
#define LUAI_MAXSTACK 50000
/* test mode uses more stack space */
#undef LUAI_MAXCCALLS
#define LUAI_MAXCCALLS 180
/* force Lua to use its own implementations */
#undef lua_strx2number
#undef lua_number2strx
#endif

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# testing special comment on first line
-- $Id: testes/main.lua $
-- See Copyright Notice in file all.lua
-- most (all?) tests here assume a reasonable "Unix-like" shell
if _port then return end
-- use only "double quotes" inside shell scripts (better change to
-- run on Windows)
print ("testing stand-alone interpreter")
assert(os.execute()) -- machine has a system command
local arg = arg or ARG
local prog = os.tmpname()
local otherprog = os.tmpname()
local out = os.tmpname()
local progname
do
local i = 0
while arg[i] do i=i-1 end
progname = arg[i+1]
end
print("progname: "..progname)
local prepfile = function (s, mod, p)
mod = mod and "wb" or "w" -- mod true means binary files
p = p or prog -- file to write the program
local f = io.open(p, mod)
f:write(s)
assert(f:close())
end
local function getoutput ()
local f = io.open(out)
local t = f:read("a")
f:close()
assert(os.remove(out))
return t
end
local function checkprogout (s)
-- expected result must end with new line
assert(string.sub(s, -1) == "\n")
local t = getoutput()
for line in string.gmatch(s, ".-\n") do
assert(string.find(t, line, 1, true))
end
end
local function checkout (s)
local t = getoutput()
if s ~= t then print(string.format("'%s' - '%s'\n", s, t)) end
assert(s == t)
return t
end
local function RUN (p, ...)
p = string.gsub(p, "lua", '"'..progname..'"', 1)
local s = string.format(p, ...)
assert(os.execute(s))
end
local function NoRun (msg, p, ...)
p = string.gsub(p, "lua", '"'..progname..'"', 1)
local s = string.format(p, ...)
s = string.format("%s >%s 2>&1", s, out) -- send output and error to 'out'
assert(not os.execute(s))
assert(string.find(getoutput(), msg, 1, true)) -- check error message
end
RUN('lua -v')
print(string.format("(temporary program file used in these tests: %s)", prog))
-- running stdin as a file
prepfile""
RUN('lua - < %s > %s', prog, out)
checkout("")
prepfile[[
print(
1, a
)
]]
RUN('lua - < %s > %s', prog, out)
checkout("1\tnil\n")
RUN('echo "print(10)\nprint(2)\n" | lua > %s', out)
checkout("10\n2\n")
-- testing BOM
prepfile("\xEF\xBB\xBF")
RUN('lua %s > %s', prog, out)
checkout("")
prepfile("\xEF\xBB\xBFprint(3)")
RUN('lua %s > %s', prog, out)
checkout("3\n")
prepfile("\xEF\xBB\xBF# comment!!\nprint(3)")
RUN('lua %s > %s', prog, out)
checkout("3\n")
-- bad BOMs
prepfile("\xEF", true)
NoRun("unexpected symbol", 'lua %s', prog)
prepfile("\xEF\xBB", true)
NoRun("unexpected symbol", 'lua %s', prog)
prepfile("\xEFprint(3)", true)
NoRun("unexpected symbol", 'lua %s', prog)
prepfile("\xEF\xBBprint(3)", true)
NoRun("unexpected symbol", 'lua %s', prog)
-- test option '-'
RUN('echo "print(arg[1])" | lua - -h > %s', out)
checkout("-h\n")
-- test environment variables used by Lua
prepfile("print(package.path)")
-- test LUA_PATH
RUN('env LUA_INIT= LUA_PATH=x lua %s > %s', prog, out)
checkout("x\n")
-- test LUA_PATH_version
RUN('env LUA_INIT= LUA_PATH_5_4=y LUA_PATH=x lua %s > %s', prog, out)
checkout("y\n")
-- test LUA_CPATH
prepfile("print(package.cpath)")
RUN('env LUA_INIT= LUA_CPATH=xuxu lua %s > %s', prog, out)
checkout("xuxu\n")
-- test LUA_CPATH_version
RUN('env LUA_INIT= LUA_CPATH_5_4=yacc LUA_CPATH=x lua %s > %s', prog, out)
checkout("yacc\n")
-- test LUA_INIT (and its access to 'arg' table)
prepfile("print(X)")
RUN('env LUA_INIT="X=tonumber(arg[1])" lua %s 3.2 > %s', prog, out)
checkout("3.2\n")
-- test LUA_INIT_version
prepfile("print(X)")
RUN('env LUA_INIT_5_4="X=10" LUA_INIT="X=3" lua %s > %s', prog, out)
checkout("10\n")
-- test LUA_INIT for files
prepfile("x = x or 10; print(x); x = x + 1")
RUN('env LUA_INIT="@%s" lua %s > %s', prog, prog, out)
checkout("10\n11\n")
-- test errors in LUA_INIT
NoRun('LUA_INIT:1: msg', 'env LUA_INIT="error(\'msg\')" lua')
-- test option '-E'
local defaultpath, defaultCpath
do
prepfile("print(package.path, package.cpath)")
RUN('env LUA_INIT="error(10)" LUA_PATH=xxx LUA_CPATH=xxx lua -E %s > %s',
prog, out)
local output = getoutput()
defaultpath = string.match(output, "^(.-)\t")
defaultCpath = string.match(output, "\t(.-)$")
-- running with an empty environment
RUN('env -i lua %s > %s', prog, out)
local out = getoutput()
assert(defaultpath == string.match(output, "^(.-)\t"))
assert(defaultCpath == string.match(output, "\t(.-)$"))
end
-- paths did not change
assert(not string.find(defaultpath, "xxx") and
string.find(defaultpath, "lua") and
not string.find(defaultCpath, "xxx") and
string.find(defaultCpath, "lua"))
-- test replacement of ';;' to default path
local function convert (p)
prepfile("print(package.path)")
RUN('env LUA_PATH="%s" lua %s > %s', p, prog, out)
local expected = getoutput()
expected = string.sub(expected, 1, -2) -- cut final end of line
if string.find(p, ";;") then
p = string.gsub(p, ";;", ";"..defaultpath..";")
p = string.gsub(p, "^;", "") -- remove ';' at the beginning
p = string.gsub(p, ";$", "") -- remove ';' at the end
end
assert(p == expected)
end
convert(";")
convert(";;")
convert("a;;b")
convert(";;b")
convert("a;;")
convert("a;b;;c")
-- test -l over multiple libraries
prepfile("print(1); a=2; return {x=15}")
prepfile(("print(a); print(_G['%s'].x)"):format(prog), false, otherprog)
RUN('env LUA_PATH="?;;" lua -l %s -l%s -lstring -l io %s > %s', prog, otherprog, otherprog, out)
checkout("1\n2\n15\n2\n15\n")
-- test explicit global names in -l
prepfile("print(str.upper'alo alo', m.max(10, 20))")
RUN("lua -l 'str=string' '-lm=math' -e 'print(m.sin(0))' %s > %s", prog, out)
checkout("0.0\nALO ALO\t20\n")
-- test module names with version sufix ("libs/lib2-v2")
RUN("env LUA_CPATH='./libs/?.so' lua -l lib2-v2 -e 'print(lib2.id())' > %s",
out)
checkout("true\n")
-- test 'arg' table
local a = [[
assert(#arg == 3 and arg[1] == 'a' and
arg[2] == 'b' and arg[3] == 'c')
assert(arg[-1] == '--' and arg[-2] == "-e " and arg[-3] == '%s')
assert(arg[4] == undef and arg[-4] == undef)
local a, b, c = ...
assert(... == 'a' and a == 'a' and b == 'b' and c == 'c')
]]
a = string.format(a, progname)
prepfile(a)
RUN('lua "-e " -- %s a b c', prog) -- "-e " runs an empty command
-- test 'arg' availability in libraries
prepfile"assert(arg)"
prepfile("assert(arg)", false, otherprog)
RUN('env LUA_PATH="?;;" lua -l%s - < %s', prog, otherprog)
-- test messing up the 'arg' table
RUN('echo "print(...)" | lua -e "arg[1] = 100" - > %s', out)
checkout("100\n")
NoRun("'arg' is not a table", 'echo "" | lua -e "arg = 1" -')
-- test error in 'print'
RUN('echo 10 | lua -e "print=nil" -i > /dev/null 2> %s', out)
assert(string.find(getoutput(), "error calling 'print'"))
-- test 'debug.debug'
RUN('echo "io.stderr:write(1000)\ncont" | lua -e "require\'debug\'.debug()" 2> %s', out)
checkout("lua_debug> 1000lua_debug> ")
print("testing warnings")
-- no warnings by default
RUN('echo "io.stderr:write(1); warn[[XXX]]" | lua 2> %s', out)
checkout("1")
prepfile[[
warn("@allow") -- unknown control, ignored
warn("@off", "XXX", "@off") -- these are not control messages
warn("@off") -- this one is
warn("@on", "YYY", "@on") -- not control, but warn is off
warn("@off") -- keep it off
warn("@on") -- restart warnings
warn("", "@on") -- again, no control, real warning
warn("@on") -- keep it "started"
warn("Z", "Z", "Z") -- common warning
]]
RUN('lua -W %s 2> %s', prog, out)
checkout[[
Lua warning: @offXXX@off
Lua warning: @on
Lua warning: ZZZ
]]
prepfile[[
warn("@allow")
-- create two objects to be finalized when closing state
-- the errors in the finalizers must generate warnings
u1 = setmetatable({}, {__gc = function () error("XYZ") end})
u2 = setmetatable({}, {__gc = function () error("ZYX") end})
]]
RUN('lua -W %s 2> %s', prog, out)
checkprogout("ZYX)\nXYZ)\n")
-- bug since 5.2: finalizer called when closing a state could
-- subvert finalization order
prepfile[[
-- should be called last
print("creating 1")
setmetatable({}, {__gc = function () print(1) end})
print("creating 2")
setmetatable({}, {__gc = function ()
print("2")
print("creating 3")
-- this finalizer should not be called, as object will be
-- created after 'lua_close' has been called
setmetatable({}, {__gc = function () print(3) end})
print(collectgarbage()) -- cannot call collector here
os.exit(0, true)
end})
]]
RUN('lua -W %s > %s', prog, out)
checkout[[
creating 1
creating 2
2
creating 3
nil
1
]]
-- test many arguments
prepfile[[print(({...})[30])]]
RUN('lua %s %s > %s', prog, string.rep(" a", 30), out)
checkout("a\n")
RUN([[lua "-eprint(1)" -ea=3 -e "print(a)" > %s]], out)
checkout("1\n3\n")
-- test iteractive mode
prepfile[[
(6*2-6) -- ===
a =
10
print(a)
a]]
RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
checkprogout("6\n10\n10\n\n")
prepfile("a = [[b\nc\nd\ne]]\n=a")
RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
checkprogout("b\nc\nd\ne\n\n")
local prompt = "alo"
prepfile[[ --
a = 2
]]
RUN([[lua "-e_PROMPT='%s'" -i < %s > %s]], prompt, prog, out)
local t = getoutput()
assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
-- using the prompt default
prepfile[[ --
a = 2
]]
RUN([[lua -i < %s > %s]], prog, out)
local t = getoutput()
prompt = "> " -- the default
assert(string.find(t, prompt .. ".*" .. prompt .. ".*" .. prompt))
-- non-string prompt
prompt =
"local C = 0;\z
_PROMPT=setmetatable({},{__tostring = function () \z
C = C + 1; return C end})"
prepfile[[ --
a = 2
]]
RUN([[lua -e "%s" -i < %s > %s]], prompt, prog, out)
local t = getoutput()
assert(string.find(t, [[
1 --
2a = 2
3
]], 1, true))
-- test for error objects
prepfile[[
debug = require "debug"
m = {x=0}
setmetatable(m, {__tostring = function(x)
return tostring(debug.getinfo(4).currentline + x.x)
end})
error(m)
]]
NoRun(progname .. ": 6\n", [[lua %s]], prog)
prepfile("error{}")
NoRun("error object is a table value", [[lua %s]], prog)
-- chunk broken in many lines
local s = [=[ --
function f ( x )
local a = [[
xuxu
]]
local b = "\
xuxu\n"
if x == 11 then return 1 + 12 , 2 + 20 end --[[ test multiple returns ]]
return x + 1
--\\
end
return( f( 100 ) )
assert( a == b )
do return f( 11 ) end ]=]
s = string.gsub(s, ' ', '\n\n') -- change all spaces for newlines
prepfile(s)
RUN([[lua -e"_PROMPT='' _PROMPT2=''" -i < %s > %s]], prog, out)
checkprogout("101\n13\t22\n\n")
prepfile[[#comment in 1st line without \n at the end]]
RUN('lua %s', prog)
-- first-line comment with binary file
prepfile("#comment\n" .. string.dump(load("print(3)")), true)
RUN('lua %s > %s', prog, out)
checkout('3\n')
-- close Lua with an open file
prepfile(string.format([[io.output(%q); io.write('alo')]], out))
RUN('lua %s', prog)
checkout('alo')
-- bug in 5.2 beta (extra \0 after version line)
RUN([[lua -v -e"print'hello'" > %s]], out)
t = getoutput()
assert(string.find(t, "PUC%-Rio\nhello"))
-- testing os.exit
prepfile("os.exit(nil, true)")
RUN('lua %s', prog)
prepfile("os.exit(0, true)")
RUN('lua %s', prog)
prepfile("os.exit(true, true)")
RUN('lua %s', prog)
prepfile("os.exit(1, true)")
NoRun("", "lua %s", prog) -- no message
prepfile("os.exit(false, true)")
NoRun("", "lua %s", prog) -- no message
-- to-be-closed variables in main chunk
prepfile[[
local x <close> = setmetatable({},
{__close = function (self, err)
assert(err == nil)
print("Ok")
end})
local e1 <close> = setmetatable({}, {__close = function () print(120) end})
os.exit(true, true)
]]
RUN('lua %s > %s', prog, out)
checkprogout("120\nOk\n")
-- remove temporary files
assert(os.remove(prog))
assert(os.remove(otherprog))
assert(not os.remove(out))
-- invalid options
NoRun("unrecognized option '-h'", "lua -h")
NoRun("unrecognized option '---'", "lua ---")
NoRun("unrecognized option '-Ex'", "lua -Ex")
NoRun("unrecognized option '-vv'", "lua -vv")
NoRun("unrecognized option '-iv'", "lua -iv")
NoRun("'-e' needs argument", "lua -e")
NoRun("syntax error", "lua -e a")
NoRun("'-l' needs argument", "lua -l")
if T then -- test library?
print("testing 'not enough memory' to create a state")
NoRun("not enough memory", "env MEMLIMIT=100 lua")
-- testing 'warn'
warn("@store")
warn("@123", "456", "789")
assert(_WARN == "@123456789"); _WARN = false
warn("zip", "", " ", "zap")
assert(_WARN == "zip zap"); _WARN = false
warn("ZIP", "", " ", "ZAP")
assert(_WARN == "ZIP ZAP"); _WARN = false
warn("@normal")
end
do
-- 'warn' must get at least one argument
local st, msg = pcall(warn)
assert(string.find(msg, "string expected"))
-- 'warn' does not leave unfinished warning in case of errors
-- (message would appear in next warning)
st, msg = pcall(warn, "SHOULD NOT APPEAR", {})
assert(string.find(msg, "string expected"))
end
print('+')
print('testing Ctrl C')
do
-- interrupt a script
local function kill (pid)
return os.execute(string.format('kill -INT %s 2> /dev/null', pid))
end
-- function to run a script in background, returning its output file
-- descriptor and its pid
local function runback (luaprg)
-- shell script to run 'luaprg' in background and echo its pid
local shellprg = string.format('%s -e "%s" & echo $!', progname, luaprg)
local f = io.popen(shellprg, "r") -- run shell script
local pid = f:read() -- get pid for Lua script
print("(if test fails now, it may leave a Lua script running in \z
background, pid " .. pid .. ")")
return f, pid
end
-- Lua script that runs protected infinite loop and then prints '42'
local f, pid = runback[[
pcall(function () print(12); while true do end end); print(42)]]
-- wait until script is inside 'pcall'
assert(f:read() == "12")
kill(pid) -- send INT signal to Lua script
-- check that 'pcall' captured the exception and script continued running
assert(f:read() == "42") -- expected output
assert(f:close())
print("done")
-- Lua script in a long unbreakable search
local f, pid = runback[[
print(15); string.find(string.rep('a', 100000), '.*b')]]
-- wait (so script can reach the loop)
assert(f:read() == "15")
assert(os.execute("sleep 1"))
-- must send at least two INT signals to stop this Lua script
local n = 100
for i = 0, 100 do -- keep sending signals
if not kill(pid) then -- until it fails
n = i -- number of non-failed kills
break
end
end
assert(f:close())
assert(n >= 2)
print(string.format("done (with %d kills)", n))
end
print("OK")

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-- $Id: testes/nextvar.lua $
-- See Copyright Notice in file all.lua
print('testing tables, next, and for')
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
local function check (t, na, nh)
if not T then return end
local a, h = T.querytab(t)
if a ~= na or h ~= nh then
print(na, nh, a, h)
assert(nil)
end
end
local a = {}
-- make sure table has lots of space in hash part
for i=1,100 do a[i.."+"] = true end
for i=1,100 do a[i.."+"] = undef end
-- fill hash part with numeric indices testing size operator
for i=1,100 do
a[i] = true
assert(#a == i)
end
do -- rehash moving elements from array to hash
local a = {}
for i = 1, 100 do a[i] = i end
check(a, 128, 0)
for i = 5, 95 do a[i] = nil end
check(a, 128, 0)
a.x = 1 -- force a re-hash
check(a, 4, 8)
for i = 1, 4 do assert(a[i] == i) end
for i = 5, 95 do assert(a[i] == nil) end
for i = 96, 100 do assert(a[i] == i) end
assert(a.x == 1)
end
-- testing ipairs
local x = 0
for k,v in ipairs{10,20,30;x=12} do
x = x + 1
assert(k == x and v == x * 10)
end
for _ in ipairs{x=12, y=24} do assert(nil) end
-- test for 'false' x ipair
x = false
local i = 0
for k,v in ipairs{true,false,true,false} do
i = i + 1
x = not x
assert(x == v)
end
assert(i == 4)
-- iterator function is always the same
assert(type(ipairs{}) == 'function' and ipairs{} == ipairs{})
do -- overflow (must wrap-around)
local f = ipairs{}
local k, v = f({[math.mininteger] = 10}, math.maxinteger)
assert(k == math.mininteger and v == 10)
k, v = f({[math.mininteger] = 10}, k)
assert(k == nil)
end
if not T then
(Message or print)
('\n >>> testC not active: skipping tests for table sizes <<<\n')
else --[
-- testing table sizes
local function mp2 (n) -- minimum power of 2 >= n
local mp = 2^math.ceil(math.log(n, 2))
assert(n == 0 or (mp/2 < n and n <= mp))
return mp
end
-- testing C library sizes
do
local s = 0
for _ in pairs(math) do s = s + 1 end
check(math, 0, mp2(s))
end
-- testing constructor sizes
local sizes = {0, 1, 2, 3, 4, 5, 7, 8, 9, 15, 16, 17,
30, 31, 32, 33, 34, 254, 255, 256, 500, 1000}
for _, sa in ipairs(sizes) do -- 'sa' is size of the array part
local arr = {"return {"}
for i = 1, sa do arr[1 + i] = "1," end -- build array part
for _, sh in ipairs(sizes) do -- 'sh' is size of the hash part
for j = 1, sh do -- build hash part
arr[1 + sa + j] = string.format('k%x=%d,', j, j)
end
arr[1 + sa + sh + 1] = "}"
local prog = table.concat(arr)
local f = assert(load(prog))
collectgarbage("stop")
f() -- call once to ensure stack space
-- make sure table is not resized after being created
if sa == 0 or sh == 0 then
T.alloccount(2); -- header + array or hash part
else
T.alloccount(3); -- header + array part + hash part
end
local t = f()
T.alloccount();
collectgarbage("restart")
assert(#t == sa)
check(t, sa, mp2(sh))
end
end
-- tests with unknown number of elements
local a = {}
for i=1,sizes[#sizes] do a[i] = i end -- build auxiliary table
for k in ipairs(sizes) do
local t = {table.unpack(a,1,k)}
assert(#t == k)
check(t, k, 0)
t = {1,2,3,table.unpack(a,1,k)}
check(t, k+3, 0)
assert(#t == k + 3)
end
-- testing tables dynamically built
local lim = 130
local a = {}; a[2] = 1; check(a, 0, 1)
a = {}; a[0] = 1; check(a, 0, 1); a[2] = 1; check(a, 0, 2)
a = {}; a[0] = 1; a[1] = 1; check(a, 1, 1)
a = {}
for i = 1,lim do
a[i] = 1
assert(#a == i)
check(a, mp2(i), 0)
end
a = {}
for i = 1,lim do
a['a'..i] = 1
assert(#a == 0)
check(a, 0, mp2(i))
end
a = {}
for i=1,16 do a[i] = i end
check(a, 16, 0)
do
for i=1,11 do a[i] = undef end
for i=30,50 do a[i] = true; a[i] = undef end -- force a rehash (?)
check(a, 0, 8) -- 5 elements in the table
a[10] = 1
for i=30,50 do a[i] = true; a[i] = undef end -- force a rehash (?)
check(a, 0, 8) -- only 6 elements in the table
for i=1,14 do a[i] = true; a[i] = undef end
for i=18,50 do a[i] = true; a[i] = undef end -- force a rehash (?)
check(a, 0, 4) -- only 2 elements ([15] and [16])
end
-- reverse filling
for i=1,lim do
local a = {}
for i=i,1,-1 do a[i] = i end -- fill in reverse
check(a, mp2(i), 0)
end
-- size tests for vararg
lim = 35
local function foo (n, ...)
local arg = {...}
check(arg, n, 0)
assert(select('#', ...) == n)
arg[n+1] = true
check(arg, mp2(n+1), 0)
arg.x = true
check(arg, mp2(n+1), 1)
end
local a = {}
for i=1,lim do a[i] = true; foo(i, table.unpack(a)) end
-- Table length with limit smaller than maximum value at array
local a = {}
for i = 1,64 do a[i] = true end -- make its array size 64
for i = 1,64 do a[i] = nil end -- erase all elements
assert(T.querytab(a) == 64) -- array part has 64 elements
a[32] = true; a[48] = true; -- binary search will find these ones
a[51] = true -- binary search will miss this one
assert(#a == 48) -- this will set the limit
assert(select(4, T.querytab(a)) == 48) -- this is the limit now
a[50] = true -- this will set a new limit
assert(select(4, T.querytab(a)) == 50) -- this is the limit now
-- but the size is larger (and still inside the array part)
assert(#a == 51)
end --]
-- test size operation on tables with nils
assert(#{} == 0)
assert(#{nil} == 0)
assert(#{nil, nil} == 0)
assert(#{nil, nil, nil} == 0)
assert(#{nil, nil, nil, nil} == 0)
assert(#{1, 2, 3, nil, nil} == 3)
print'+'
local nofind = {}
a,b,c = 1,2,3
a,b,c = nil
-- next uses always the same iteraction function
assert(next{} == next{})
local function find (name)
local n,v
while 1 do
n,v = next(_G, n)
if not n then return nofind end
assert(_G[n] ~= undef)
if n == name then return v end
end
end
local function find1 (name)
for n,v in pairs(_G) do
if n==name then return v end
end
return nil -- not found
end
assert(print==find("print") and print == find1("print"))
assert(_G["print"]==find("print"))
assert(assert==find1("assert"))
assert(nofind==find("return"))
assert(not find1("return"))
_G["ret" .. "urn"] = undef
assert(nofind==find("return"))
_G["xxx"] = 1
assert(xxx==find("xxx"))
-- invalid key to 'next'
checkerror("invalid key", next, {10,20}, 3)
-- both 'pairs' and 'ipairs' need an argument
checkerror("bad argument", pairs)
checkerror("bad argument", ipairs)
print('+')
a = {}
for i=0,10000 do
if math.fmod(i,10) ~= 0 then
a['x'..i] = i
end
end
n = {n=0}
for i,v in pairs(a) do
n.n = n.n+1
assert(i and v and a[i] == v)
end
assert(n.n == 9000)
a = nil
do -- clear global table
local a = {}
for n,v in pairs(_G) do a[n]=v end
for n,v in pairs(a) do
if not package.loaded[n] and type(v) ~= "function" and
not string.find(n, "^[%u_]") then
_G[n] = undef
end
collectgarbage()
end
end
--
local function checknext (a)
local b = {}
do local k,v = next(a); while k do b[k] = v; k,v = next(a,k) end end
for k,v in pairs(b) do assert(a[k] == v) end
for k,v in pairs(a) do assert(b[k] == v) end
end
checknext{1,x=1,y=2,z=3}
checknext{1,2,x=1,y=2,z=3}
checknext{1,2,3,x=1,y=2,z=3}
checknext{1,2,3,4,x=1,y=2,z=3}
checknext{1,2,3,4,5,x=1,y=2,z=3}
assert(#{} == 0)
assert(#{[-1] = 2} == 0)
for i=0,40 do
local a = {}
for j=1,i do a[j]=j end
assert(#a == i)
end
-- 'maxn' is now deprecated, but it is easily defined in Lua
function table.maxn (t)
local max = 0
for k in pairs(t) do
max = (type(k) == 'number') and math.max(max, k) or max
end
return max
end
assert(table.maxn{} == 0)
assert(table.maxn{["1000"] = true} == 0)
assert(table.maxn{["1000"] = true, [24.5] = 3} == 24.5)
assert(table.maxn{[1000] = true} == 1000)
assert(table.maxn{[10] = true, [100*math.pi] = print} == 100*math.pi)
table.maxn = nil
-- int overflow
a = {}
for i=0,50 do a[2^i] = true end
assert(a[#a])
print('+')
do -- testing 'next' with all kinds of keys
local a = {
[1] = 1, -- integer
[1.1] = 2, -- float
['x'] = 3, -- short string
[string.rep('x', 1000)] = 4, -- long string
[print] = 5, -- C function
[checkerror] = 6, -- Lua function
[coroutine.running()] = 7, -- thread
[true] = 8, -- boolean
[io.stdin] = 9, -- userdata
[{}] = 10, -- table
}
local b = {}; for i = 1, 10 do b[i] = true end
for k, v in pairs(a) do
assert(b[v]); b[v] = undef
end
assert(next(b) == nil) -- 'b' now is empty
end
-- erasing values
local t = {[{1}] = 1, [{2}] = 2, [string.rep("x ", 4)] = 3,
[100.3] = 4, [4] = 5}
local n = 0
for k, v in pairs( t ) do
n = n+1
assert(t[k] == v)
t[k] = undef
collectgarbage()
assert(t[k] == undef)
end
assert(n == 5)
do
print("testing next x GC of deleted keys")
-- bug in 5.4.1
local co = coroutine.wrap(function (t)
for k, v in pairs(t) do
local k1 = next(t) -- all previous keys were deleted
assert(k == k1) -- current key is the first in the table
t[k] = nil
local expected = (type(k) == "table" and k[1] or
type(k) == "function" and k() or
string.sub(k, 1, 1))
assert(expected == v)
coroutine.yield(v)
end
end)
local t = {}
t[{1}] = 1 -- add several unanchored, collectable keys
t[{2}] = 2
t[string.rep("a", 50)] = "a" -- long string
t[string.rep("b", 50)] = "b"
t[{3}] = 3
t[string.rep("c", 10)] = "c" -- short string
t[function () return 10 end] = 10
local count = 7
while co(t) do
collectgarbage("collect") -- collect dead keys
count = count - 1
end
assert(count == 0 and next(t) == nil) -- traversed the whole table
end
local function test (a)
assert(not pcall(table.insert, a, 2, 20));
table.insert(a, 10); table.insert(a, 2, 20);
table.insert(a, 1, -1); table.insert(a, 40);
table.insert(a, #a+1, 50)
table.insert(a, 2, -2)
assert(a[2] ~= undef)
assert(a["2"] == undef)
assert(not pcall(table.insert, a, 0, 20));
assert(not pcall(table.insert, a, #a + 2, 20));
assert(table.remove(a,1) == -1)
assert(table.remove(a,1) == -2)
assert(table.remove(a,1) == 10)
assert(table.remove(a,1) == 20)
assert(table.remove(a,1) == 40)
assert(table.remove(a,1) == 50)
assert(table.remove(a,1) == nil)
assert(table.remove(a) == nil)
assert(table.remove(a, #a) == nil)
end
a = {n=0, [-7] = "ban"}
test(a)
assert(a.n == 0 and a[-7] == "ban")
a = {[-7] = "ban"};
test(a)
assert(a.n == nil and #a == 0 and a[-7] == "ban")
a = {[-1] = "ban"}
test(a)
assert(#a == 0 and table.remove(a) == nil and a[-1] == "ban")
a = {[0] = "ban"}
assert(#a == 0 and table.remove(a) == "ban" and a[0] == undef)
table.insert(a, 1, 10); table.insert(a, 1, 20); table.insert(a, 1, -1)
assert(table.remove(a) == 10)
assert(table.remove(a) == 20)
assert(table.remove(a) == -1)
assert(table.remove(a) == nil)
a = {'c', 'd'}
table.insert(a, 3, 'a')
table.insert(a, 'b')
assert(table.remove(a, 1) == 'c')
assert(table.remove(a, 1) == 'd')
assert(table.remove(a, 1) == 'a')
assert(table.remove(a, 1) == 'b')
assert(table.remove(a, 1) == nil)
assert(#a == 0 and a.n == nil)
a = {10,20,30,40}
assert(table.remove(a, #a + 1) == nil)
assert(not pcall(table.remove, a, 0))
assert(a[#a] == 40)
assert(table.remove(a, #a) == 40)
assert(a[#a] == 30)
assert(table.remove(a, 2) == 20)
assert(a[#a] == 30 and #a == 2)
do -- testing table library with metamethods
local function test (proxy, t)
for i = 1, 10 do
table.insert(proxy, 1, i)
end
assert(#proxy == 10 and #t == 10 and proxy[1] ~= undef)
for i = 1, 10 do
assert(t[i] == 11 - i)
end
table.sort(proxy)
for i = 1, 10 do
assert(t[i] == i and proxy[i] == i)
end
assert(table.concat(proxy, ",") == "1,2,3,4,5,6,7,8,9,10")
for i = 1, 8 do
assert(table.remove(proxy, 1) == i)
end
assert(#proxy == 2 and #t == 2)
local a, b, c = table.unpack(proxy)
assert(a == 9 and b == 10 and c == nil)
end
-- all virtual
local t = {}
local proxy = setmetatable({}, {
__len = function () return #t end,
__index = t,
__newindex = t,
})
test(proxy, t)
-- only __newindex
local count = 0
t = setmetatable({}, {
__newindex = function (t,k,v) count = count + 1; rawset(t,k,v) end})
test(t, t)
assert(count == 10) -- after first 10, all other sets are not new
-- no __newindex
t = setmetatable({}, {
__index = function (_,k) return k + 1 end,
__len = function (_) return 5 end})
assert(table.concat(t, ";") == "2;3;4;5;6")
end
do -- testing overflow in table.insert (must wrap-around)
local t = setmetatable({},
{__len = function () return math.maxinteger end})
table.insert(t, 20)
local k, v = next(t)
assert(k == math.mininteger and v == 20)
end
if not T then
(Message or print)
('\n >>> testC not active: skipping tests for table library on non-tables <<<\n')
else --[
local debug = require'debug'
local tab = {10, 20, 30}
local mt = {}
local u = T.newuserdata(0)
checkerror("table expected", table.insert, u, 40)
checkerror("table expected", table.remove, u)
debug.setmetatable(u, mt)
checkerror("table expected", table.insert, u, 40)
checkerror("table expected", table.remove, u)
mt.__index = tab
checkerror("table expected", table.insert, u, 40)
checkerror("table expected", table.remove, u)
mt.__newindex = tab
checkerror("table expected", table.insert, u, 40)
checkerror("table expected", table.remove, u)
mt.__len = function () return #tab end
table.insert(u, 40)
assert(#u == 4 and #tab == 4 and u[4] == 40 and tab[4] == 40)
assert(table.remove(u) == 40)
table.insert(u, 1, 50)
assert(#u == 4 and #tab == 4 and u[4] == 30 and tab[1] == 50)
mt.__newindex = nil
mt.__len = nil
local tab2 = {}
local u2 = T.newuserdata(0)
debug.setmetatable(u2, {__newindex = function (_, k, v) tab2[k] = v end})
table.move(u, 1, 4, 1, u2)
assert(#tab2 == 4 and tab2[1] == tab[1] and tab2[4] == tab[4])
end -- ]
print('+')
a = {}
for i=1,1000 do
a[i] = i; a[i - 1] = undef
end
assert(next(a,nil) == 1000 and next(a,1000) == nil)
assert(next({}) == nil)
assert(next({}, nil) == nil)
for a,b in pairs{} do error"not here" end
for i=1,0 do error'not here' end
for i=0,1,-1 do error'not here' end
a = nil; for i=1,1 do assert(not a); a=1 end; assert(a)
a = nil; for i=1,1,-1 do assert(not a); a=1 end; assert(a)
do
print("testing floats in numeric for")
local a
-- integer count
a = 0; for i=1, 1, 1 do a=a+1 end; assert(a==1)
a = 0; for i=10000, 1e4, -1 do a=a+1 end; assert(a==1)
a = 0; for i=1, 0.99999, 1 do a=a+1 end; assert(a==0)
a = 0; for i=9999, 1e4, -1 do a=a+1 end; assert(a==0)
a = 0; for i=1, 0.99999, -1 do a=a+1 end; assert(a==1)
-- float count
a = 0; for i=0, 0.999999999, 0.1 do a=a+1 end; assert(a==10)
a = 0; for i=1.0, 1, 1 do a=a+1 end; assert(a==1)
a = 0; for i=-1.5, -1.5, 1 do a=a+1 end; assert(a==1)
a = 0; for i=1e6, 1e6, -1 do a=a+1 end; assert(a==1)
a = 0; for i=1.0, 0.99999, 1 do a=a+1 end; assert(a==0)
a = 0; for i=99999, 1e5, -1.0 do a=a+1 end; assert(a==0)
a = 0; for i=1.0, 0.99999, -1 do a=a+1 end; assert(a==1)
end
do -- changing the control variable
local a
a = 0; for i = 1, 10 do a = a + 1; i = "x" end; assert(a == 10)
a = 0; for i = 10.0, 1, -1 do a = a + 1; i = "x" end; assert(a == 10)
end
-- conversion
a = 0; for i="10","1","-2" do a=a+1 end; assert(a==5)
do -- checking types
local c
local function checkfloat (i)
assert(math.type(i) == "float")
c = c + 1
end
c = 0; for i = 1.0, 10 do checkfloat(i) end
assert(c == 10)
c = 0; for i = -1, -10, -1.0 do checkfloat(i) end
assert(c == 10)
local function checkint (i)
assert(math.type(i) == "integer")
c = c + 1
end
local m = math.maxinteger
c = 0; for i = m, m - 10, -1 do checkint(i) end
assert(c == 11)
c = 0; for i = 1, 10.9 do checkint(i) end
assert(c == 10)
c = 0; for i = 10, 0.001, -1 do checkint(i) end
assert(c == 10)
c = 0; for i = 1, "10.8" do checkint(i) end
assert(c == 10)
c = 0; for i = 9, "3.4", -1 do checkint(i) end
assert(c == 6)
c = 0; for i = 0, " -3.4 ", -1 do checkint(i) end
assert(c == 4)
c = 0; for i = 100, "96.3", -2 do checkint(i) end
assert(c == 2)
c = 0; for i = 1, math.huge do if i > 10 then break end; checkint(i) end
assert(c == 10)
c = 0; for i = -1, -math.huge, -1 do
if i < -10 then break end; checkint(i)
end
assert(c == 10)
for i = math.mininteger, -10e100 do assert(false) end
for i = math.maxinteger, 10e100, -1 do assert(false) end
end
do -- testing other strange cases for numeric 'for'
local function checkfor (from, to, step, t)
local c = 0
for i = from, to, step do
c = c + 1
assert(i == t[c])
end
assert(c == #t)
end
local maxi = math.maxinteger
local mini = math.mininteger
checkfor(mini, maxi, maxi, {mini, -1, maxi - 1})
checkfor(mini, math.huge, maxi, {mini, -1, maxi - 1})
checkfor(maxi, mini, mini, {maxi, -1})
checkfor(maxi, mini, -maxi, {maxi, 0, -maxi})
checkfor(maxi, -math.huge, mini, {maxi, -1})
checkfor(maxi, mini, 1, {})
checkfor(mini, maxi, -1, {})
checkfor(maxi - 6, maxi, 3, {maxi - 6, maxi - 3, maxi})
checkfor(mini + 4, mini, -2, {mini + 4, mini + 2, mini})
local step = maxi // 10
local c = mini
for i = mini, maxi, step do
assert(i == c)
c = c + step
end
c = maxi
for i = maxi, mini, -step do
assert(i == c)
c = c - step
end
checkfor(maxi, maxi, maxi, {maxi})
checkfor(maxi, maxi, mini, {maxi})
checkfor(mini, mini, maxi, {mini})
checkfor(mini, mini, mini, {mini})
end
checkerror("'for' step is zero", function ()
for i = 1, 10, 0 do end
end)
checkerror("'for' step is zero", function ()
for i = 1, -10, 0 do end
end)
checkerror("'for' step is zero", function ()
for i = 1.0, -10, 0.0 do end
end)
collectgarbage()
-- testing generic 'for'
local function f (n, p)
local t = {}; for i=1,p do t[i] = i*10 end
return function (_, n, ...)
assert(select("#", ...) == 0) -- no extra arguments
if n > 0 then
n = n-1
return n, table.unpack(t)
end
end, nil, n
end
local x = 0
for n,a,b,c,d in f(5,3) do
x = x+1
assert(a == 10 and b == 20 and c == 30 and d == nil)
end
assert(x == 5)
-- testing __pairs and __ipairs metamethod
a = {}
do
local x,y,z = pairs(a)
assert(type(x) == 'function' and y == a and z == nil)
end
local function foo (e,i)
assert(e == a)
if i <= 10 then return i+1, i+2 end
end
local function foo1 (e,i)
i = i + 1
assert(e == a)
if i <= e.n then return i,a[i] end
end
setmetatable(a, {__pairs = function (x) return foo, x, 0 end})
local i = 0
for k,v in pairs(a) do
i = i + 1
assert(k == i and v == k+1)
end
a.n = 5
a[3] = 30
-- testing ipairs with metamethods
a = {n=10}
setmetatable(a, { __index = function (t,k)
if k <= t.n then return k * 10 end
end})
i = 0
for k,v in ipairs(a) do
i = i + 1
assert(k == i and v == i * 10)
end
assert(i == a.n)
-- testing yield inside __pairs
do
local t = setmetatable({10, 20, 30}, {__pairs = function (t)
local inc = coroutine.yield()
return function (t, i)
if i > 1 then return i - inc, t[i - inc] else return nil end
end, t, #t + 1
end})
local res = {}
local co = coroutine.wrap(function ()
for i,p in pairs(t) do res[#res + 1] = p end
end)
co() -- start coroutine
co(1) -- continue after yield
assert(res[1] == 30 and res[2] == 20 and res[3] == 10 and #res == 3)
end
print"OK"

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-- $Id: testes/pm.lua $
-- See Copyright Notice in file all.lua
-- UTF-8 file
print('testing pattern matching')
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
local function f (s, p)
local i,e = string.find(s, p)
if i then return string.sub(s, i, e) end
end
local a,b = string.find('', '') -- empty patterns are tricky
assert(a == 1 and b == 0);
a,b = string.find('alo', '')
assert(a == 1 and b == 0)
a,b = string.find('a\0o a\0o a\0o', 'a', 1) -- first position
assert(a == 1 and b == 1)
a,b = string.find('a\0o a\0o a\0o', 'a\0o', 2) -- starts in the midle
assert(a == 5 and b == 7)
a,b = string.find('a\0o a\0o a\0o', 'a\0o', 9) -- starts in the midle
assert(a == 9 and b == 11)
a,b = string.find('a\0a\0a\0a\0\0ab', '\0ab', 2); -- finds at the end
assert(a == 9 and b == 11);
a,b = string.find('a\0a\0a\0a\0\0ab', 'b') -- last position
assert(a == 11 and b == 11)
assert(not string.find('a\0a\0a\0a\0\0ab', 'b\0')) -- check ending
assert(not string.find('', '\0'))
assert(string.find('alo123alo', '12') == 4)
assert(not string.find('alo123alo', '^12'))
assert(string.match("aaab", ".*b") == "aaab")
assert(string.match("aaa", ".*a") == "aaa")
assert(string.match("b", ".*b") == "b")
assert(string.match("aaab", ".+b") == "aaab")
assert(string.match("aaa", ".+a") == "aaa")
assert(not string.match("b", ".+b"))
assert(string.match("aaab", ".?b") == "ab")
assert(string.match("aaa", ".?a") == "aa")
assert(string.match("b", ".?b") == "b")
assert(f('aloALO', '%l*') == 'alo')
assert(f('aLo_ALO', '%a*') == 'aLo')
assert(f(" \n\r*&\n\r xuxu \n\n", "%g%g%g+") == "xuxu")
-- Adapt a pattern to UTF-8
local function PU (p)
-- reapply '?' into each individual byte of a character.
-- (For instance, "á?" becomes "\195?\161?".)
p = string.gsub(p, "(" .. utf8.charpattern .. ")%?", function (c)
return string.gsub(c, ".", "%0?")
end)
-- change '.' to utf-8 character patterns
p = string.gsub(p, "%.", utf8.charpattern)
return p
end
assert(f('aaab', 'a*') == 'aaa');
assert(f('aaa', '^.*$') == 'aaa');
assert(f('aaa', 'b*') == '');
assert(f('aaa', 'ab*a') == 'aa')
assert(f('aba', 'ab*a') == 'aba')
assert(f('aaab', 'a+') == 'aaa')
assert(f('aaa', '^.+$') == 'aaa')
assert(not f('aaa', 'b+'))
assert(not f('aaa', 'ab+a'))
assert(f('aba', 'ab+a') == 'aba')
assert(f('a$a', '.$') == 'a')
assert(f('a$a', '.%$') == 'a$')
assert(f('a$a', '.$.') == 'a$a')
assert(not f('a$a', '$$'))
assert(not f('a$b', 'a$'))
assert(f('a$a', '$') == '')
assert(f('', 'b*') == '')
assert(not f('aaa', 'bb*'))
assert(f('aaab', 'a-') == '')
assert(f('aaa', '^.-$') == 'aaa')
assert(f('aabaaabaaabaaaba', 'b.*b') == 'baaabaaabaaab')
assert(f('aabaaabaaabaaaba', 'b.-b') == 'baaab')
assert(f('alo xo', '.o$') == 'xo')
assert(f(' \n isto é assim', '%S%S*') == 'isto')
assert(f(' \n isto é assim', '%S*$') == 'assim')
assert(f(' \n isto é assim', '[a-z]*$') == 'assim')
assert(f('um caracter ? extra', '[^%sa-z]') == '?')
assert(f('', 'a?') == '')
assert(f('á', PU'á?') == 'á')
assert(f('ábl', PU'á?b?l?') == 'ábl')
assert(f(' ábl', PU'á?b?l?') == '')
assert(f('aa', '^aa?a?a') == 'aa')
assert(f(']]]áb', '[^]]+') == 'áb')
assert(f("0alo alo", "%x*") == "0a")
assert(f("alo alo", "%C+") == "alo alo")
print('+')
local function f1 (s, p)
p = string.gsub(p, "%%([0-9])", function (s)
return "%" .. (tonumber(s)+1)
end)
p = string.gsub(p, "^(^?)", "%1()", 1)
p = string.gsub(p, "($?)$", "()%1", 1)
local t = {string.match(s, p)}
return string.sub(s, t[1], t[#t] - 1)
end
assert(f1('alo alx 123 b\0o b\0o', '(..*) %1') == "b\0o b\0o")
assert(f1('axz123= 4= 4 34', '(.+)=(.*)=%2 %1') == '3= 4= 4 3')
assert(f1('=======', '^(=*)=%1$') == '=======')
assert(not string.match('==========', '^([=]*)=%1$'))
local function range (i, j)
if i <= j then
return i, range(i+1, j)
end
end
local abc = string.char(range(0, 127)) .. string.char(range(128, 255));
assert(string.len(abc) == 256)
local function strset (p)
local res = {s=''}
string.gsub(abc, p, function (c) res.s = res.s .. c end)
return res.s
end;
assert(string.len(strset('[\200-\210]')) == 11)
assert(strset('[a-z]') == "abcdefghijklmnopqrstuvwxyz")
assert(strset('[a-z%d]') == strset('[%da-uu-z]'))
assert(strset('[a-]') == "-a")
assert(strset('[^%W]') == strset('[%w]'))
assert(strset('[]%%]') == '%]')
assert(strset('[a%-z]') == '-az')
assert(strset('[%^%[%-a%]%-b]') == '-[]^ab')
assert(strset('%Z') == strset('[\1-\255]'))
assert(strset('.') == strset('[\1-\255%z]'))
print('+');
assert(string.match("alo xyzK", "(%w+)K") == "xyz")
assert(string.match("254 K", "(%d*)K") == "")
assert(string.match("alo ", "(%w*)$") == "")
assert(not string.match("alo ", "(%w+)$"))
assert(string.find("(álo)", "%(á") == 1)
local a, b, c, d, e = string.match("âlo alo", PU"^(((.).). (%w*))$")
assert(a == 'âlo alo' and b == 'âl' and c == 'â' and d == 'alo' and e == nil)
a, b, c, d = string.match('0123456789', '(.+(.?)())')
assert(a == '0123456789' and b == '' and c == 11 and d == nil)
print('+')
assert(string.gsub('ülo ülo', 'ü', 'x') == 'xlo xlo')
assert(string.gsub('alo úlo ', ' +$', '') == 'alo úlo') -- trim
assert(string.gsub(' alo alo ', '^%s*(.-)%s*$', '%1') == 'alo alo') -- double trim
assert(string.gsub('alo alo \n 123\n ', '%s+', ' ') == 'alo alo 123 ')
local t = "abç d"
a, b = string.gsub(t, PU'(.)', '%1@')
assert(a == "a@b@ç@ @d@" and b == 5)
a, b = string.gsub('abçd', PU'(.)', '%0@', 2)
assert(a == 'a@b@çd' and b == 2)
assert(string.gsub('alo alo', '()[al]', '%1') == '12o 56o')
assert(string.gsub("abc=xyz", "(%w*)(%p)(%w+)", "%3%2%1-%0") ==
"xyz=abc-abc=xyz")
assert(string.gsub("abc", "%w", "%1%0") == "aabbcc")
assert(string.gsub("abc", "%w+", "%0%1") == "abcabc")
assert(string.gsub('áéí', '$', '\0óú') == 'áéí\0óú')
assert(string.gsub('', '^', 'r') == 'r')
assert(string.gsub('', '$', 'r') == 'r')
print('+')
do -- new (5.3.3) semantics for empty matches
assert(string.gsub("a b cd", " *", "-") == "-a-b-c-d-")
local res = ""
local sub = "a \nbc\t\td"
local i = 1
for p, e in string.gmatch(sub, "()%s*()") do
res = res .. string.sub(sub, i, p - 1) .. "-"
i = e
end
assert(res == "-a-b-c-d-")
end
assert(string.gsub("um (dois) tres (quatro)", "(%(%w+%))", string.upper) ==
"um (DOIS) tres (QUATRO)")
do
local function setglobal (n,v) rawset(_G, n, v) end
string.gsub("a=roberto,roberto=a", "(%w+)=(%w%w*)", setglobal)
assert(_G.a=="roberto" and _G.roberto=="a")
_G.a = nil; _G.roberto = nil
end
function f(a,b) return string.gsub(a,'.',b) end
assert(string.gsub("trocar tudo em |teste|b| é |beleza|al|", "|([^|]*)|([^|]*)|", f) ==
"trocar tudo em bbbbb é alalalalalal")
local function dostring (s) return load(s, "")() or "" end
assert(string.gsub("alo $a='x'$ novamente $return a$",
"$([^$]*)%$",
dostring) == "alo novamente x")
local x = string.gsub("$x=string.gsub('alo', '.', string.upper)$ assim vai para $return x$",
"$([^$]*)%$", dostring)
assert(x == ' assim vai para ALO')
_G.a, _G.x = nil
local t = {}
local s = 'a alo jose joao'
local r = string.gsub(s, '()(%w+)()', function (a,w,b)
assert(string.len(w) == b-a);
t[a] = b-a;
end)
assert(s == r and t[1] == 1 and t[3] == 3 and t[7] == 4 and t[13] == 4)
local function isbalanced (s)
return not string.find(string.gsub(s, "%b()", ""), "[()]")
end
assert(isbalanced("(9 ((8))(\0) 7) \0\0 a b ()(c)() a"))
assert(not isbalanced("(9 ((8) 7) a b (\0 c) a"))
assert(string.gsub("alo 'oi' alo", "%b''", '"') == 'alo " alo')
local t = {"apple", "orange", "lime"; n=0}
assert(string.gsub("x and x and x", "x", function () t.n=t.n+1; return t[t.n] end)
== "apple and orange and lime")
t = {n=0}
string.gsub("first second word", "%w%w*", function (w) t.n=t.n+1; t[t.n] = w end)
assert(t[1] == "first" and t[2] == "second" and t[3] == "word" and t.n == 3)
t = {n=0}
assert(string.gsub("first second word", "%w+",
function (w) t.n=t.n+1; t[t.n] = w end, 2) == "first second word")
assert(t[1] == "first" and t[2] == "second" and t[3] == undef)
checkerror("invalid replacement value %(a table%)",
string.gsub, "alo", ".", {a = {}})
checkerror("invalid capture index %%2", string.gsub, "alo", ".", "%2")
checkerror("invalid capture index %%0", string.gsub, "alo", "(%0)", "a")
checkerror("invalid capture index %%1", string.gsub, "alo", "(%1)", "a")
checkerror("invalid use of '%%'", string.gsub, "alo", ".", "%x")
if not _soft then
print("big strings")
local a = string.rep('a', 300000)
assert(string.find(a, '^a*.?$'))
assert(not string.find(a, '^a*.?b$'))
assert(string.find(a, '^a-.?$'))
-- bug in 5.1.2
a = string.rep('a', 10000) .. string.rep('b', 10000)
assert(not pcall(string.gsub, a, 'b'))
end
-- recursive nest of gsubs
local function rev (s)
return string.gsub(s, "(.)(.+)", function (c,s1) return rev(s1)..c end)
end
local x = "abcdef"
assert(rev(rev(x)) == x)
-- gsub with tables
assert(string.gsub("alo alo", ".", {}) == "alo alo")
assert(string.gsub("alo alo", "(.)", {a="AA", l=""}) == "AAo AAo")
assert(string.gsub("alo alo", "(.).", {a="AA", l="K"}) == "AAo AAo")
assert(string.gsub("alo alo", "((.)(.?))", {al="AA", o=false}) == "AAo AAo")
assert(string.gsub("alo alo", "().", {'x','yy','zzz'}) == "xyyzzz alo")
t = {}; setmetatable(t, {__index = function (t,s) return string.upper(s) end})
assert(string.gsub("a alo b hi", "%w%w+", t) == "a ALO b HI")
-- tests for gmatch
local a = 0
for i in string.gmatch('abcde', '()') do assert(i == a+1); a=i end
assert(a==6)
t = {n=0}
for w in string.gmatch("first second word", "%w+") do
t.n=t.n+1; t[t.n] = w
end
assert(t[1] == "first" and t[2] == "second" and t[3] == "word")
t = {3, 6, 9}
for i in string.gmatch ("xuxx uu ppar r", "()(.)%2") do
assert(i == table.remove(t, 1))
end
assert(#t == 0)
t = {}
for i,j in string.gmatch("13 14 10 = 11, 15= 16, 22=23", "(%d+)%s*=%s*(%d+)") do
t[tonumber(i)] = tonumber(j)
end
a = 0
for k,v in pairs(t) do assert(k+1 == v+0); a=a+1 end
assert(a == 3)
do -- init parameter in gmatch
local s = 0
for k in string.gmatch("10 20 30", "%d+", 3) do
s = s + tonumber(k)
end
assert(s == 50)
s = 0
for k in string.gmatch("11 21 31", "%d+", -4) do
s = s + tonumber(k)
end
assert(s == 32)
-- there is an empty string at the end of the subject
s = 0
for k in string.gmatch("11 21 31", "%w*", 9) do
s = s + 1
end
assert(s == 1)
-- there are no empty strings after the end of the subject
s = 0
for k in string.gmatch("11 21 31", "%w*", 10) do
s = s + 1
end
assert(s == 0)
end
-- tests for `%f' (`frontiers')
assert(string.gsub("aaa aa a aaa a", "%f[%w]a", "x") == "xaa xa x xaa x")
assert(string.gsub("[[]] [][] [[[[", "%f[[].", "x") == "x[]] x]x] x[[[")
assert(string.gsub("01abc45de3", "%f[%d]", ".") == ".01abc.45de.3")
assert(string.gsub("01abc45 de3x", "%f[%D]%w", ".") == "01.bc45 de3.")
assert(string.gsub("function", "%f[\1-\255]%w", ".") == ".unction")
assert(string.gsub("function", "%f[^\1-\255]", ".") == "function.")
assert(string.find("a", "%f[a]") == 1)
assert(string.find("a", "%f[^%z]") == 1)
assert(string.find("a", "%f[^%l]") == 2)
assert(string.find("aba", "%f[a%z]") == 3)
assert(string.find("aba", "%f[%z]") == 4)
assert(not string.find("aba", "%f[%l%z]"))
assert(not string.find("aba", "%f[^%l%z]"))
local i, e = string.find(" alo aalo allo", "%f[%S].-%f[%s].-%f[%S]")
assert(i == 2 and e == 5)
local k = string.match(" alo aalo allo", "%f[%S](.-%f[%s].-%f[%S])")
assert(k == 'alo ')
local a = {1, 5, 9, 14, 17,}
for k in string.gmatch("alo alo th02 is 1hat", "()%f[%w%d]") do
assert(table.remove(a, 1) == k)
end
assert(#a == 0)
-- malformed patterns
local function malform (p, m)
m = m or "malformed"
local r, msg = pcall(string.find, "a", p)
assert(not r and string.find(msg, m))
end
malform("(.", "unfinished capture")
malform(".)", "invalid pattern capture")
malform("[a")
malform("[]")
malform("[^]")
malform("[a%]")
malform("[a%")
malform("%b")
malform("%ba")
malform("%")
malform("%f", "missing")
-- \0 in patterns
assert(string.match("ab\0\1\2c", "[\0-\2]+") == "\0\1\2")
assert(string.match("ab\0\1\2c", "[\0-\0]+") == "\0")
assert(string.find("b$a", "$\0?") == 2)
assert(string.find("abc\0efg", "%\0") == 4)
assert(string.match("abc\0efg\0\1e\1g", "%b\0\1") == "\0efg\0\1e\1")
assert(string.match("abc\0\0\0", "%\0+") == "\0\0\0")
assert(string.match("abc\0\0\0", "%\0%\0?") == "\0\0")
-- magic char after \0
assert(string.find("abc\0\0","\0.") == 4)
assert(string.find("abcx\0\0abc\0abc","x\0\0abc\0a.") == 4)
do -- test reuse of original string in gsub
local s = string.rep("a", 100)
local r = string.gsub(s, "b", "c") -- no match
assert(string.format("%p", s) == string.format("%p", r))
r = string.gsub(s, ".", {x = "y"}) -- no substitutions
assert(string.format("%p", s) == string.format("%p", r))
local count = 0
r = string.gsub(s, ".", function (x)
assert(x == "a")
count = count + 1
return nil -- no substitution
end)
r = string.gsub(r, ".", {b = 'x'}) -- "a" is not a key; no subst.
assert(count == 100)
assert(string.format("%p", s) == string.format("%p", r))
count = 0
r = string.gsub(s, ".", function (x)
assert(x == "a")
count = count + 1
return x -- substitution...
end)
assert(count == 100)
-- no reuse in this case
assert(r == s and string.format("%p", s) ~= string.format("%p", r))
end
print('OK')

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-- $Id: testes/sort.lua $
-- See Copyright Notice in file all.lua
print "testing (parts of) table library"
print "testing unpack"
local unpack = table.unpack
local maxI = math.maxinteger
local minI = math.mininteger
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
checkerror("wrong number of arguments", table.insert, {}, 2, 3, 4)
local x,y,z,a,n
a = {}; local lim = _soft and 200 or 2000
for i=1, lim do a[i]=i end
assert(select(lim, unpack(a)) == lim and select('#', unpack(a)) == lim)
x = unpack(a)
assert(x == 1)
x = {unpack(a)}
assert(#x == lim and x[1] == 1 and x[lim] == lim)
x = {unpack(a, lim-2)}
assert(#x == 3 and x[1] == lim-2 and x[3] == lim)
x = {unpack(a, 10, 6)}
assert(next(x) == nil) -- no elements
x = {unpack(a, 11, 10)}
assert(next(x) == nil) -- no elements
x,y = unpack(a, 10, 10)
assert(x == 10 and y == nil)
x,y,z = unpack(a, 10, 11)
assert(x == 10 and y == 11 and z == nil)
a,x = unpack{1}
assert(a==1 and x==nil)
a,x = unpack({1,2}, 1, 1)
assert(a==1 and x==nil)
do
local maxi = (1 << 31) - 1 -- maximum value for an int (usually)
local mini = -(1 << 31) -- minimum value for an int (usually)
checkerror("too many results", unpack, {}, 0, maxi)
checkerror("too many results", unpack, {}, 1, maxi)
checkerror("too many results", unpack, {}, 0, maxI)
checkerror("too many results", unpack, {}, 1, maxI)
checkerror("too many results", unpack, {}, mini, maxi)
checkerror("too many results", unpack, {}, -maxi, maxi)
checkerror("too many results", unpack, {}, minI, maxI)
unpack({}, maxi, 0)
unpack({}, maxi, 1)
unpack({}, maxI, minI)
pcall(unpack, {}, 1, maxi + 1)
local a, b = unpack({[maxi] = 20}, maxi, maxi)
assert(a == 20 and b == nil)
a, b = unpack({[maxi] = 20}, maxi - 1, maxi)
assert(a == nil and b == 20)
local t = {[maxI - 1] = 12, [maxI] = 23}
a, b = unpack(t, maxI - 1, maxI); assert(a == 12 and b == 23)
a, b = unpack(t, maxI, maxI); assert(a == 23 and b == nil)
a, b = unpack(t, maxI, maxI - 1); assert(a == nil and b == nil)
t = {[minI] = 12.3, [minI + 1] = 23.5}
a, b = unpack(t, minI, minI + 1); assert(a == 12.3 and b == 23.5)
a, b = unpack(t, minI, minI); assert(a == 12.3 and b == nil)
a, b = unpack(t, minI + 1, minI); assert(a == nil and b == nil)
end
do -- length is not an integer
local t = setmetatable({}, {__len = function () return 'abc' end})
assert(#t == 'abc')
checkerror("object length is not an integer", table.insert, t, 1)
end
print "testing pack"
a = table.pack()
assert(a[1] == undef and a.n == 0)
a = table.pack(table)
assert(a[1] == table and a.n == 1)
a = table.pack(nil, nil, nil, nil)
assert(a[1] == nil and a.n == 4)
-- testing move
do
checkerror("table expected", table.move, 1, 2, 3, 4)
local function eqT (a, b)
for k, v in pairs(a) do assert(b[k] == v) end
for k, v in pairs(b) do assert(a[k] == v) end
end
local a = table.move({10,20,30}, 1, 3, 2) -- move forward
eqT(a, {10,10,20,30})
-- move forward with overlap of 1
a = table.move({10, 20, 30}, 1, 3, 3)
eqT(a, {10, 20, 10, 20, 30})
-- moving to the same table (not being explicit about it)
a = {10, 20, 30, 40}
table.move(a, 1, 4, 2, a)
eqT(a, {10, 10, 20, 30, 40})
a = table.move({10,20,30}, 2, 3, 1) -- move backward
eqT(a, {20,30,30})
a = {} -- move to new table
assert(table.move({10,20,30}, 1, 3, 1, a) == a)
eqT(a, {10,20,30})
a = {}
assert(table.move({10,20,30}, 1, 0, 3, a) == a) -- empty move (no move)
eqT(a, {})
a = table.move({10,20,30}, 1, 10, 1) -- move to the same place
eqT(a, {10,20,30})
-- moving on the fringes
a = table.move({[maxI - 2] = 1, [maxI - 1] = 2, [maxI] = 3},
maxI - 2, maxI, -10, {})
eqT(a, {[-10] = 1, [-9] = 2, [-8] = 3})
a = table.move({[minI] = 1, [minI + 1] = 2, [minI + 2] = 3},
minI, minI + 2, -10, {})
eqT(a, {[-10] = 1, [-9] = 2, [-8] = 3})
a = table.move({45}, 1, 1, maxI)
eqT(a, {45, [maxI] = 45})
a = table.move({[maxI] = 100}, maxI, maxI, minI)
eqT(a, {[minI] = 100, [maxI] = 100})
a = table.move({[minI] = 100}, minI, minI, maxI)
eqT(a, {[minI] = 100, [maxI] = 100})
a = setmetatable({}, {
__index = function (_,k) return k * 10 end,
__newindex = error})
local b = table.move(a, 1, 10, 3, {})
eqT(a, {})
eqT(b, {nil,nil,10,20,30,40,50,60,70,80,90,100})
b = setmetatable({""}, {
__index = error,
__newindex = function (t,k,v)
t[1] = string.format("%s(%d,%d)", t[1], k, v)
end})
table.move(a, 10, 13, 3, b)
assert(b[1] == "(3,100)(4,110)(5,120)(6,130)")
local stat, msg = pcall(table.move, b, 10, 13, 3, b)
assert(not stat and msg == b)
end
do
-- for very long moves, just check initial accesses and interrupt
-- move with an error
local function checkmove (f, e, t, x, y)
local pos1, pos2
local a = setmetatable({}, {
__index = function (_,k) pos1 = k end,
__newindex = function (_,k) pos2 = k; error() end, })
local st, msg = pcall(table.move, a, f, e, t)
assert(not st and not msg and pos1 == x and pos2 == y)
end
checkmove(1, maxI, 0, 1, 0)
checkmove(0, maxI - 1, 1, maxI - 1, maxI)
checkmove(minI, -2, -5, -2, maxI - 6)
checkmove(minI + 1, -1, -2, -1, maxI - 3)
checkmove(minI, -2, 0, minI, 0) -- non overlapping
checkmove(minI + 1, -1, 1, minI + 1, 1) -- non overlapping
end
checkerror("too many", table.move, {}, 0, maxI, 1)
checkerror("too many", table.move, {}, -1, maxI - 1, 1)
checkerror("too many", table.move, {}, minI, -1, 1)
checkerror("too many", table.move, {}, minI, maxI, 1)
checkerror("wrap around", table.move, {}, 1, maxI, 2)
checkerror("wrap around", table.move, {}, 1, 2, maxI)
checkerror("wrap around", table.move, {}, minI, -2, 2)
print"testing sort"
-- strange lengths
local a = setmetatable({}, {__len = function () return -1 end})
assert(#a == -1)
table.sort(a, error) -- should not compare anything
a = setmetatable({}, {__len = function () return maxI end})
checkerror("too big", table.sort, a)
-- test checks for invalid order functions
local function check (t)
local function f(a, b) assert(a and b); return true end
checkerror("invalid order function", table.sort, t, f)
end
check{1,2,3,4}
check{1,2,3,4,5}
check{1,2,3,4,5,6}
function check (a, f)
f = f or function (x,y) return x<y end;
for n = #a, 2, -1 do
assert(not f(a[n], a[n-1]))
end
end
a = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep",
"Oct", "Nov", "Dec"}
table.sort(a)
check(a)
local function perm (s, n)
n = n or #s
if n == 1 then
local t = {unpack(s)}
table.sort(t)
check(t)
else
for i = 1, n do
s[i], s[n] = s[n], s[i]
perm(s, n - 1)
s[i], s[n] = s[n], s[i]
end
end
end
perm{}
perm{1}
perm{1,2}
perm{1,2,3}
perm{1,2,3,4}
perm{2,2,3,4}
perm{1,2,3,4,5}
perm{1,2,3,3,5}
perm{1,2,3,4,5,6}
perm{2,2,3,3,5,6}
local function timesort (a, n, func, msg, pre)
local x = os.clock()
table.sort(a, func)
x = (os.clock() - x) * 1000
pre = pre or ""
print(string.format("%ssorting %d %s elements in %.2f msec.", pre, n, msg, x))
check(a, func)
end
local limit = 50000
if _soft then limit = 5000 end
a = {}
for i=1,limit do
a[i] = math.random()
end
timesort(a, limit, nil, "random")
timesort(a, limit, nil, "sorted", "re-")
a = {}
for i=1,limit do
a[i] = math.random()
end
local x = os.clock(); local i = 0
table.sort(a, function(x,y) i=i+1; return y<x end)
x = (os.clock() - x) * 1000
print(string.format("Invert-sorting other %d elements in %.2f msec., with %i comparisons",
limit, x, i))
check(a, function(x,y) return y<x end)
table.sort{} -- empty array
for i=1,limit do a[i] = false end
timesort(a, limit, function(x,y) return nil end, "equal")
for i,v in pairs(a) do assert(v == false) end
AA = {"\xE1lo", "\0first :-)", "alo", "then this one", "45", "and a new"}
table.sort(AA)
check(AA)
table.sort(AA, function (x, y)
load(string.format("AA[%q] = ''", x), "")()
collectgarbage()
return x<y
end)
_G.AA = nil
local tt = {__lt = function (a,b) return a.val < b.val end}
a = {}
for i=1,10 do a[i] = {val=math.random(100)}; setmetatable(a[i], tt); end
table.sort(a)
check(a, tt.__lt)
check(a)
print"OK"

526
lua-5.4.7-tests/strings.lua Normal file
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@ -0,0 +1,526 @@
-- $Id: testes/strings.lua $
-- See Copyright Notice in file all.lua
-- ISO Latin encoding
print('testing strings and string library')
local maxi <const> = math.maxinteger
local mini <const> = math.mininteger
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
-- testing string comparisons
assert('alo' < 'alo1')
assert('' < 'a')
assert('alo\0alo' < 'alo\0b')
assert('alo\0alo\0\0' > 'alo\0alo\0')
assert('alo' < 'alo\0')
assert('alo\0' > 'alo')
assert('\0' < '\1')
assert('\0\0' < '\0\1')
assert('\1\0a\0a' <= '\1\0a\0a')
assert(not ('\1\0a\0b' <= '\1\0a\0a'))
assert('\0\0\0' < '\0\0\0\0')
assert(not('\0\0\0\0' < '\0\0\0'))
assert('\0\0\0' <= '\0\0\0\0')
assert(not('\0\0\0\0' <= '\0\0\0'))
assert('\0\0\0' <= '\0\0\0')
assert('\0\0\0' >= '\0\0\0')
assert(not ('\0\0b' < '\0\0a\0'))
-- testing string.sub
assert(string.sub("123456789",2,4) == "234")
assert(string.sub("123456789",7) == "789")
assert(string.sub("123456789",7,6) == "")
assert(string.sub("123456789",7,7) == "7")
assert(string.sub("123456789",0,0) == "")
assert(string.sub("123456789",-10,10) == "123456789")
assert(string.sub("123456789",1,9) == "123456789")
assert(string.sub("123456789",-10,-20) == "")
assert(string.sub("123456789",-1) == "9")
assert(string.sub("123456789",-4) == "6789")
assert(string.sub("123456789",-6, -4) == "456")
assert(string.sub("123456789", mini, -4) == "123456")
assert(string.sub("123456789", mini, maxi) == "123456789")
assert(string.sub("123456789", mini, mini) == "")
assert(string.sub("\000123456789",3,5) == "234")
assert(("\000123456789"):sub(8) == "789")
-- testing string.find
assert(string.find("123456789", "345") == 3)
local a,b = string.find("123456789", "345")
assert(string.sub("123456789", a, b) == "345")
assert(string.find("1234567890123456789", "345", 3) == 3)
assert(string.find("1234567890123456789", "345", 4) == 13)
assert(not string.find("1234567890123456789", "346", 4))
assert(string.find("1234567890123456789", ".45", -9) == 13)
assert(not string.find("abcdefg", "\0", 5, 1))
assert(string.find("", "") == 1)
assert(string.find("", "", 1) == 1)
assert(not string.find("", "", 2))
assert(not string.find('', 'aaa', 1))
assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
assert(string.len("") == 0)
assert(string.len("\0\0\0") == 3)
assert(string.len("1234567890") == 10)
assert(#"" == 0)
assert(#"\0\0\0" == 3)
assert(#"1234567890" == 10)
-- testing string.byte/string.char
assert(string.byte("a") == 97)
assert(string.byte("\xe4") > 127)
assert(string.byte(string.char(255)) == 255)
assert(string.byte(string.char(0)) == 0)
assert(string.byte("\0") == 0)
assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
assert(string.byte("ba", 2) == 97)
assert(string.byte("\n\n", 2, -1) == 10)
assert(string.byte("\n\n", 2, 2) == 10)
assert(string.byte("") == nil)
assert(string.byte("hi", -3) == nil)
assert(string.byte("hi", 3) == nil)
assert(string.byte("hi", 9, 10) == nil)
assert(string.byte("hi", 2, 1) == nil)
assert(string.char() == "")
assert(string.char(0, 255, 0) == "\0\255\0")
assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
checkerror("out of range", string.char, 256)
checkerror("out of range", string.char, -1)
checkerror("out of range", string.char, math.maxinteger)
checkerror("out of range", string.char, math.mininteger)
assert(string.upper("ab\0c") == "AB\0C")
assert(string.lower("\0ABCc%$") == "\0abcc%$")
assert(string.rep('teste', 0) == '')
assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
assert(string.rep('', 10) == '')
if string.packsize("i") == 4 then
-- result length would be 2^31 (int overflow)
checkerror("too large", string.rep, 'aa', (1 << 30))
checkerror("too large", string.rep, 'a', (1 << 30), ',')
end
-- repetitions with separator
assert(string.rep('teste', 0, 'xuxu') == '')
assert(string.rep('teste', 1, 'xuxu') == 'teste')
assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
assert(string.rep('', 10, '.') == string.rep('.', 9))
assert(not pcall(string.rep, "aa", maxi // 2 + 10))
assert(not pcall(string.rep, "", maxi // 2 + 10, "aa"))
assert(string.reverse"" == "")
assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
assert(string.reverse"\0001234" == "4321\0")
for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
assert(type(tostring(nil)) == 'string')
assert(type(tostring(12)) == 'string')
assert(string.find(tostring{}, 'table:'))
assert(string.find(tostring(print), 'function:'))
assert(#tostring('\0') == 1)
assert(tostring(true) == "true")
assert(tostring(false) == "false")
assert(tostring(-1203) == "-1203")
assert(tostring(1203.125) == "1203.125")
assert(tostring(-0.5) == "-0.5")
assert(tostring(-32767) == "-32767")
if math.tointeger(2147483647) then -- no overflow? (32 bits)
assert(tostring(-2147483647) == "-2147483647")
end
if math.tointeger(4611686018427387904) then -- no overflow? (64 bits)
assert(tostring(4611686018427387904) == "4611686018427387904")
assert(tostring(-4611686018427387904) == "-4611686018427387904")
end
if tostring(0.0) == "0.0" then -- "standard" coercion float->string
assert('' .. 12 == '12' and 12.0 .. '' == '12.0')
assert(tostring(-1203 + 0.0) == "-1203.0")
else -- compatible coercion
assert(tostring(0.0) == "0")
assert('' .. 12 == '12' and 12.0 .. '' == '12')
assert(tostring(-1203 + 0.0) == "-1203")
end
do -- tests for '%p' format
-- not much to test, as C does not specify what '%p' does.
-- ("The value of the pointer is converted to a sequence of printing
-- characters, in an implementation-defined manner.")
local null = "(null)" -- nulls are formatted by Lua
assert(string.format("%p", 4) == null)
assert(string.format("%p", true) == null)
assert(string.format("%p", nil) == null)
assert(string.format("%p", {}) ~= null)
assert(string.format("%p", print) ~= null)
assert(string.format("%p", coroutine.running()) ~= null)
assert(string.format("%p", io.stdin) ~= null)
assert(string.format("%p", io.stdin) == string.format("%p", io.stdin))
assert(string.format("%p", print) == string.format("%p", print))
assert(string.format("%p", print) ~= string.format("%p", assert))
assert(#string.format("%90p", {}) == 90)
assert(#string.format("%-60p", {}) == 60)
assert(string.format("%10p", false) == string.rep(" ", 10 - #null) .. null)
assert(string.format("%-12p", 1.5) == null .. string.rep(" ", 12 - #null))
do
local t1 = {}; local t2 = {}
assert(string.format("%p", t1) ~= string.format("%p", t2))
end
do -- short strings are internalized
local s1 = string.rep("a", 10)
local s2 = string.rep("aa", 5)
assert(string.format("%p", s1) == string.format("%p", s2))
end
do -- long strings aren't internalized
local s1 = string.rep("a", 300); local s2 = string.rep("a", 300)
assert(string.format("%p", s1) ~= string.format("%p", s2))
end
end
local x = '"ílo"\n\\'
assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
assert(string.format('%q', "\0") == [["\0"]])
assert(load(string.format('return %q', x))() == x)
x = "\0\1\0023\5\0009"
assert(load(string.format('return %q', x))() == x)
assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
"\0\xe4\0b8c\0")
assert(string.format('') == "")
assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
string.format("%1c%-c%-1c%c", 34, 48, 90, 100))
assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
assert(tonumber(string.format("%f", 10.3)) == 10.3)
assert(string.format('"%-50s"', 'a') == '"a' .. string.rep(' ', 49) .. '"')
assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
"-"..string.rep("%", 20)..".20s")
assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
string.format("%q", "-"..string.rep("%", 2000)..".20s"))
do
local function checkQ (v)
local s = string.format("%q", v)
local nv = load("return " .. s)()
assert(v == nv and math.type(v) == math.type(nv))
end
checkQ("\0\0\1\255\u{234}")
checkQ(math.maxinteger)
checkQ(math.mininteger)
checkQ(math.pi)
checkQ(0.1)
checkQ(true)
checkQ(nil)
checkQ(false)
checkQ(math.huge)
checkQ(-math.huge)
assert(string.format("%q", 0/0) == "(0/0)") -- NaN
checkerror("no literal", string.format, "%q", {})
end
assert(string.format("\0%s\0", "\0\0\1") == "\0\0\0\1\0")
checkerror("contains zeros", string.format, "%10s", "\0")
-- format x tostring
assert(string.format("%s %s", nil, true) == "nil true")
assert(string.format("%s %.4s", false, true) == "false true")
assert(string.format("%.3s %.3s", false, true) == "fal tru")
local m = setmetatable({}, {__tostring = function () return "hello" end,
__name = "hi"})
assert(string.format("%s %.10s", m, m) == "hello hello")
getmetatable(m).__tostring = nil -- will use '__name' from now on
assert(string.format("%.4s", m) == "hi: ")
getmetatable(m).__tostring = function () return {} end
checkerror("'__tostring' must return a string", tostring, m)
assert(string.format("%x", 0.0) == "0")
assert(string.format("%02x", 0.0) == "00")
assert(string.format("%08X", 0xFFFFFFFF) == "FFFFFFFF")
assert(string.format("%+08d", 31501) == "+0031501")
assert(string.format("%+08d", -30927) == "-0030927")
do -- longest number that can be formatted
local i = 1
local j = 10000
while i + 1 < j do -- binary search for maximum finite float
local m = (i + j) // 2
if 10^m < math.huge then i = m else j = m end
end
assert(10^i < math.huge and 10^j == math.huge)
local s = string.format('%.99f', -(10^i))
assert(string.len(s) >= i + 101)
assert(tonumber(s) == -(10^i))
-- limit for floats
assert(10^38 < math.huge)
local s = string.format('%.99f', -(10^38))
assert(string.len(s) >= 38 + 101)
assert(tonumber(s) == -(10^38))
end
-- testing large numbers for format
do -- assume at least 32 bits
local max, min = 0x7fffffff, -0x80000000 -- "large" for 32 bits
assert(string.sub(string.format("%8x", -1), -8) == "ffffffff")
assert(string.format("%x", max) == "7fffffff")
assert(string.sub(string.format("%x", min), -8) == "80000000")
assert(string.format("%d", max) == "2147483647")
assert(string.format("%d", min) == "-2147483648")
assert(string.format("%u", 0xffffffff) == "4294967295")
assert(string.format("%o", 0xABCD) == "125715")
max, min = 0x7fffffffffffffff, -0x8000000000000000
if max > 2.0^53 then -- only for 64 bits
assert(string.format("%x", (2^52 | 0) - 1) == "fffffffffffff")
assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
assert(string.format("%d", 2^53) == "9007199254740992")
assert(string.format("%i", -2^53) == "-9007199254740992")
assert(string.format("%x", max) == "7fffffffffffffff")
assert(string.format("%x", min) == "8000000000000000")
assert(string.format("%d", max) == "9223372036854775807")
assert(string.format("%d", min) == "-9223372036854775808")
assert(string.format("%u", ~(-1 << 64)) == "18446744073709551615")
assert(tostring(1234567890123) == '1234567890123')
end
end
do print("testing 'format %a %A'")
local function matchhexa (n)
local s = string.format("%a", n)
-- result matches ISO C requirements
assert(string.find(s, "^%-?0x[1-9a-f]%.?[0-9a-f]*p[-+]?%d+$"))
assert(tonumber(s) == n) -- and has full precision
s = string.format("%A", n)
assert(string.find(s, "^%-?0X[1-9A-F]%.?[0-9A-F]*P[-+]?%d+$"))
assert(tonumber(s) == n)
end
for _, n in ipairs{0.1, -0.1, 1/3, -1/3, 1e30, -1e30,
-45/247, 1, -1, 2, -2, 3e-20, -3e-20} do
matchhexa(n)
end
assert(string.find(string.format("%A", 0.0), "^0X0%.?0*P%+?0$"))
assert(string.find(string.format("%a", -0.0), "^%-0x0%.?0*p%+?0$"))
if not _port then -- test inf, -inf, NaN, and -0.0
assert(string.find(string.format("%a", 1/0), "^inf"))
assert(string.find(string.format("%A", -1/0), "^%-INF"))
assert(string.find(string.format("%a", 0/0), "^%-?nan"))
assert(string.find(string.format("%a", -0.0), "^%-0x0"))
end
if not pcall(string.format, "%.3a", 0) then
(Message or print)("\n >>> modifiers for format '%a' not available <<<\n")
else
assert(string.find(string.format("%+.2A", 12), "^%+0X%x%.%x0P%+?%d$"))
assert(string.find(string.format("%.4A", -12), "^%-0X%x%.%x000P%+?%d$"))
end
end
-- testing some flags (all these results are required by ISO C)
assert(string.format("%#12o", 10) == " 012")
assert(string.format("%#10x", 100) == " 0x64")
assert(string.format("%#-17X", 100) == "0X64 ")
assert(string.format("%013i", -100) == "-000000000100")
assert(string.format("%2.5d", -100) == "-00100")
assert(string.format("%.u", 0) == "")
assert(string.format("%+#014.0f", 100) == "+000000000100.")
assert(string.format("%-16c", 97) == "a ")
assert(string.format("%+.3G", 1.5) == "+1.5")
assert(string.format("%.0s", "alo") == "")
assert(string.format("%.s", "alo") == "")
-- ISO C89 says that "The exponent always contains at least two digits",
-- but unlike ISO C99 it does not ensure that it contains "only as many
-- more digits as necessary".
assert(string.match(string.format("% 1.0E", 100), "^ 1E%+0+2$"))
assert(string.match(string.format("% .1g", 2^10), "^ 1e%+0+3$"))
-- errors in format
local function check (fmt, msg)
checkerror(msg, string.format, fmt, 10)
end
local aux = string.rep('0', 600)
check("%100.3d", "invalid conversion")
check("%1"..aux..".3d", "too long")
check("%1.100d", "invalid conversion")
check("%10.1"..aux.."004d", "too long")
check("%t", "invalid conversion")
check("%"..aux.."d", "too long")
check("%d %d", "no value")
check("%010c", "invalid conversion")
check("%.10c", "invalid conversion")
check("%0.34s", "invalid conversion")
check("%#i", "invalid conversion")
check("%3.1p", "invalid conversion")
check("%0.s", "invalid conversion")
check("%10q", "cannot have modifiers")
check("%F", "invalid conversion") -- useless and not in C89
assert(load("return 1\n--comment without ending EOL")() == 1)
checkerror("table expected", table.concat, 3)
checkerror("at index " .. maxi, table.concat, {}, " ", maxi, maxi)
-- '%' escapes following minus signal
checkerror("at index %" .. mini, table.concat, {}, " ", mini, mini)
assert(table.concat{} == "")
assert(table.concat({}, 'x') == "")
assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
local a = {}; for i=1,300 do a[i] = "xuxu" end
assert(table.concat(a, "123").."123" == string.rep("xuxu123", 300))
assert(table.concat(a, "b", 20, 20) == "xuxu")
assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
assert(table.concat(a, "x", 22, 21) == "")
assert(table.concat(a, "3", 299) == "xuxu3xuxu")
assert(table.concat({}, "x", maxi, maxi - 1) == "")
assert(table.concat({}, "x", mini + 1, mini) == "")
assert(table.concat({}, "x", maxi, mini) == "")
assert(table.concat({[maxi] = "alo"}, "x", maxi, maxi) == "alo")
assert(table.concat({[maxi] = "alo", [maxi - 1] = "y"}, "-", maxi - 1, maxi)
== "y-alo")
assert(not pcall(table.concat, {"a", "b", {}}))
a = {"a","b","c"}
assert(table.concat(a, ",", 1, 0) == "")
assert(table.concat(a, ",", 1, 1) == "a")
assert(table.concat(a, ",", 1, 2) == "a,b")
assert(table.concat(a, ",", 2) == "b,c")
assert(table.concat(a, ",", 3) == "c")
assert(table.concat(a, ",", 4) == "")
if not _port then
local locales = { "ptb", "pt_BR.iso88591", "ISO-8859-1" }
local function trylocale (w)
for i = 1, #locales do
if os.setlocale(locales[i], w) then
print(string.format("'%s' locale set to '%s'", w, locales[i]))
return locales[i]
end
end
print(string.format("'%s' locale not found", w))
return false
end
if trylocale("collate") then
assert("alo" < "álo" and "álo" < "amo")
end
if trylocale("ctype") then
assert(string.gsub("áéíóú", "%a", "x") == "xxxxx")
assert(string.gsub("áÁéÉ", "%l", "x") == "xÁxÉ")
assert(string.gsub("áÁéÉ", "%u", "x") == "áxéx")
assert(string.upper"áÁé{xuxu}ção" == "ÁÁÉ{XUXU}ÇÃO")
end
os.setlocale("C")
assert(os.setlocale() == 'C')
assert(os.setlocale(nil, "numeric") == 'C')
end
-- bug in Lua 5.3.2
-- 'gmatch' iterator does not work across coroutines
do
local f = string.gmatch("1 2 3 4 5", "%d+")
assert(f() == "1")
local co = coroutine.wrap(f)
assert(co() == "2")
end
if T==nil then
(Message or print)
("\n >>> testC not active: skipping 'pushfstring' tests <<<\n")
else
print"testing 'pushfstring'"
-- formats %U, %f, %I already tested elsewhere
local blen = 200 -- internal buffer length in 'luaO_pushfstring'
local function callpfs (op, fmt, n)
local x = {T.testC("pushfstring" .. op .. "; return *", fmt, n)}
-- stack has code, 'fmt', 'n', and result from operation
assert(#x == 4) -- make sure nothing else was left in the stack
return x[4]
end
local function testpfs (op, fmt, n)
assert(callpfs(op, fmt, n) == string.format(fmt, n))
end
testpfs("I", "", 0)
testpfs("I", string.rep("a", blen - 1), 0)
testpfs("I", string.rep("a", blen), 0)
testpfs("I", string.rep("a", blen + 1), 0)
local str = string.rep("ab", blen) .. "%d" .. string.rep("d", blen / 2)
testpfs("I", str, 2^14)
testpfs("I", str, -2^15)
str = "%d" .. string.rep("cd", blen)
testpfs("I", str, 2^14)
testpfs("I", str, -2^15)
str = string.rep("c", blen - 2) .. "%d"
testpfs("I", str, 2^14)
testpfs("I", str, -2^15)
for l = 12, 14 do
local str1 = string.rep("a", l)
for i = 0, 500, 13 do
for j = 0, 500, 13 do
str = string.rep("a", i) .. "%s" .. string.rep("d", j)
testpfs("S", str, str1)
testpfs("S", str, str)
end
end
end
str = "abc %c def"
testpfs("I", str, string.byte("A"))
testpfs("I", str, 255)
str = string.rep("a", blen - 1) .. "%p" .. string.rep("cd", blen)
testpfs("P", str, {})
str = string.rep("%%", 3 * blen) .. "%p" .. string.rep("%%", 2 * blen)
testpfs("P", str, {})
end
print('OK')

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-- $Id: testes/tpack.lua $
-- See Copyright Notice in file all.lua
local pack = string.pack
local packsize = string.packsize
local unpack = string.unpack
print "testing pack/unpack"
-- maximum size for integers
local NB = 16
local sizeshort = packsize("h")
local sizeint = packsize("i")
local sizelong = packsize("l")
local sizesize_t = packsize("T")
local sizeLI = packsize("j")
local sizefloat = packsize("f")
local sizedouble = packsize("d")
local sizenumber = packsize("n")
local little = (pack("i2", 1) == "\1\0")
local align = packsize("!xXi16")
assert(1 <= sizeshort and sizeshort <= sizeint and sizeint <= sizelong and
sizefloat <= sizedouble)
print("platform:")
print(string.format(
"\tshort %d, int %d, long %d, size_t %d, float %d, double %d,\n\z
\tlua Integer %d, lua Number %d",
sizeshort, sizeint, sizelong, sizesize_t, sizefloat, sizedouble,
sizeLI, sizenumber))
print("\t" .. (little and "little" or "big") .. " endian")
print("\talignment: " .. align)
-- check errors in arguments
local function checkerror (msg, f, ...)
local status, err = pcall(f, ...)
-- print(status, err, msg)
assert(not status and string.find(err, msg))
end
-- minimum behavior for integer formats
assert(unpack("B", pack("B", 0xff)) == 0xff)
assert(unpack("b", pack("b", 0x7f)) == 0x7f)
assert(unpack("b", pack("b", -0x80)) == -0x80)
assert(unpack("H", pack("H", 0xffff)) == 0xffff)
assert(unpack("h", pack("h", 0x7fff)) == 0x7fff)
assert(unpack("h", pack("h", -0x8000)) == -0x8000)
assert(unpack("L", pack("L", 0xffffffff)) == 0xffffffff)
assert(unpack("l", pack("l", 0x7fffffff)) == 0x7fffffff)
assert(unpack("l", pack("l", -0x80000000)) == -0x80000000)
for i = 1, NB do
-- small numbers with signal extension ("\xFF...")
local s = string.rep("\xff", i)
assert(pack("i" .. i, -1) == s)
assert(packsize("i" .. i) == #s)
assert(unpack("i" .. i, s) == -1)
-- small unsigned number ("\0...\xAA")
s = "\xAA" .. string.rep("\0", i - 1)
assert(pack("<I" .. i, 0xAA) == s)
assert(unpack("<I" .. i, s) == 0xAA)
assert(pack(">I" .. i, 0xAA) == s:reverse())
assert(unpack(">I" .. i, s:reverse()) == 0xAA)
end
do
local lnum = 0x13121110090807060504030201
local s = pack("<j", lnum)
assert(unpack("<j", s) == lnum)
assert(unpack("<i" .. sizeLI + 1, s .. "\0") == lnum)
assert(unpack("<i" .. sizeLI + 1, s .. "\0") == lnum)
for i = sizeLI + 1, NB do
local s = pack("<j", -lnum)
assert(unpack("<j", s) == -lnum)
-- strings with (correct) extra bytes
assert(unpack("<i" .. i, s .. ("\xFF"):rep(i - sizeLI)) == -lnum)
assert(unpack(">i" .. i, ("\xFF"):rep(i - sizeLI) .. s:reverse()) == -lnum)
assert(unpack("<I" .. i, s .. ("\0"):rep(i - sizeLI)) == -lnum)
-- overflows
checkerror("does not fit", unpack, "<I" .. i, ("\x00"):rep(i - 1) .. "\1")
checkerror("does not fit", unpack, ">i" .. i, "\1" .. ("\x00"):rep(i - 1))
end
end
for i = 1, sizeLI do
local lstr = "\1\2\3\4\5\6\7\8\9\10\11\12\13"
local lnum = 0x13121110090807060504030201
local n = lnum & (~(-1 << (i * 8)))
local s = string.sub(lstr, 1, i)
assert(pack("<i" .. i, n) == s)
assert(pack(">i" .. i, n) == s:reverse())
assert(unpack(">i" .. i, s:reverse()) == n)
end
-- sign extension
do
local u = 0xf0
for i = 1, sizeLI - 1 do
assert(unpack("<i"..i, "\xf0"..("\xff"):rep(i - 1)) == -16)
assert(unpack(">I"..i, "\xf0"..("\xff"):rep(i - 1)) == u)
u = u * 256 + 0xff
end
end
-- mixed endianness
do
assert(pack(">i2 <i2", 10, 20) == "\0\10\20\0")
local a, b = unpack("<i2 >i2", "\10\0\0\20")
assert(a == 10 and b == 20)
assert(pack("=i4", 2001) == pack("i4", 2001))
end
print("testing invalid formats")
checkerror("out of limits", pack, "i0", 0)
checkerror("out of limits", pack, "i" .. NB + 1, 0)
checkerror("out of limits", pack, "!" .. NB + 1, 0)
checkerror("%(17%) out of limits %[1,16%]", pack, "Xi" .. NB + 1)
checkerror("invalid format option 'r'", pack, "i3r", 0)
checkerror("16%-byte integer", unpack, "i16", string.rep('\3', 16))
checkerror("not power of 2", pack, "!4i3", 0);
checkerror("missing size", pack, "c", "")
checkerror("variable%-length format", packsize, "s")
checkerror("variable%-length format", packsize, "z")
-- overflow in option size (error will be in digit after limit)
checkerror("invalid format", packsize, "c1" .. string.rep("0", 40))
if packsize("i") == 4 then
-- result would be 2^31 (2^3 repetitions of 2^28 strings)
local s = string.rep("c268435456", 2^3)
checkerror("too large", packsize, s)
-- one less is OK
s = string.rep("c268435456", 2^3 - 1) .. "c268435455"
assert(packsize(s) == 0x7fffffff)
end
-- overflow in packing
for i = 1, sizeLI - 1 do
local umax = (1 << (i * 8)) - 1
local max = umax >> 1
local min = ~max
checkerror("overflow", pack, "<I" .. i, -1)
checkerror("overflow", pack, "<I" .. i, min)
checkerror("overflow", pack, ">I" .. i, umax + 1)
checkerror("overflow", pack, ">i" .. i, umax)
checkerror("overflow", pack, ">i" .. i, max + 1)
checkerror("overflow", pack, "<i" .. i, min - 1)
assert(unpack(">i" .. i, pack(">i" .. i, max)) == max)
assert(unpack("<i" .. i, pack("<i" .. i, min)) == min)
assert(unpack(">I" .. i, pack(">I" .. i, umax)) == umax)
end
-- Lua integer size
assert(unpack(">j", pack(">j", math.maxinteger)) == math.maxinteger)
assert(unpack("<j", pack("<j", math.mininteger)) == math.mininteger)
assert(unpack("<J", pack("<j", -1)) == -1) -- maximum unsigned integer
if little then
assert(pack("f", 24) == pack("<f", 24))
else
assert(pack("f", 24) == pack(">f", 24))
end
print "testing pack/unpack of floating-point numbers"
for _, n in ipairs{0, -1.1, 1.9, 1/0, -1/0, 1e20, -1e20, 0.1, 2000.7} do
assert(unpack("n", pack("n", n)) == n)
assert(unpack("<n", pack("<n", n)) == n)
assert(unpack(">n", pack(">n", n)) == n)
assert(pack("<f", n) == pack(">f", n):reverse())
assert(pack(">d", n) == pack("<d", n):reverse())
end
-- for non-native precisions, test only with "round" numbers
for _, n in ipairs{0, -1.5, 1/0, -1/0, 1e10, -1e9, 0.5, 2000.25} do
assert(unpack("<f", pack("<f", n)) == n)
assert(unpack(">f", pack(">f", n)) == n)
assert(unpack("<d", pack("<d", n)) == n)
assert(unpack(">d", pack(">d", n)) == n)
end
print "testing pack/unpack of strings"
do
local s = string.rep("abc", 1000)
assert(pack("zB", s, 247) == s .. "\0\xF7")
local s1, b = unpack("zB", s .. "\0\xF9")
assert(b == 249 and s1 == s)
s1 = pack("s", s)
assert(unpack("s", s1) == s)
checkerror("does not fit", pack, "s1", s)
checkerror("contains zeros", pack, "z", "alo\0");
checkerror("unfinished string", unpack, "zc10000000", "alo")
for i = 2, NB do
local s1 = pack("s" .. i, s)
assert(unpack("s" .. i, s1) == s and #s1 == #s + i)
end
end
do
local x = pack("s", "alo")
checkerror("too short", unpack, "s", x:sub(1, -2))
checkerror("too short", unpack, "c5", "abcd")
checkerror("out of limits", pack, "s100", "alo")
end
do
assert(pack("c0", "") == "")
assert(packsize("c0") == 0)
assert(unpack("c0", "") == "")
assert(pack("<! c3", "abc") == "abc")
assert(packsize("<! c3") == 3)
assert(pack(">!4 c6", "abcdef") == "abcdef")
assert(pack("c3", "123") == "123")
assert(pack("c0", "") == "")
assert(pack("c8", "123456") == "123456\0\0")
assert(pack("c88", "") == string.rep("\0", 88))
assert(pack("c188", "ab") == "ab" .. string.rep("\0", 188 - 2))
local a, b, c = unpack("!4 z c3", "abcdefghi\0xyz")
assert(a == "abcdefghi" and b == "xyz" and c == 14)
checkerror("longer than", pack, "c3", "1234")
end
-- testing multiple types and sequence
do
local x = pack("<b h b f d f n i", 1, 2, 3, 4, 5, 6, 7, 8)
assert(#x == packsize("<b h b f d f n i"))
local a, b, c, d, e, f, g, h = unpack("<b h b f d f n i", x)
assert(a == 1 and b == 2 and c == 3 and d == 4 and e == 5 and f == 6 and
g == 7 and h == 8)
end
print "testing alignment"
do
assert(pack(" < i1 i2 ", 2, 3) == "\2\3\0") -- no alignment by default
local x = pack(">!8 b Xh i4 i8 c1 Xi8", -12, 100, 200, "\xEC")
assert(#x == packsize(">!8 b Xh i4 i8 c1 Xi8"))
assert(x == "\xf4" .. "\0\0\0" ..
"\0\0\0\100" ..
"\0\0\0\0\0\0\0\xC8" ..
"\xEC" .. "\0\0\0\0\0\0\0")
local a, b, c, d, pos = unpack(">!8 c1 Xh i4 i8 b Xi8 XI XH", x)
assert(a == "\xF4" and b == 100 and c == 200 and d == -20 and (pos - 1) == #x)
x = pack(">!4 c3 c4 c2 z i4 c5 c2 Xi4",
"abc", "abcd", "xz", "hello", 5, "world", "xy")
assert(x == "abcabcdxzhello\0\0\0\0\0\5worldxy\0")
local a, b, c, d, e, f, g, pos = unpack(">!4 c3 c4 c2 z i4 c5 c2 Xh Xi4", x)
assert(a == "abc" and b == "abcd" and c == "xz" and d == "hello" and
e == 5 and f == "world" and g == "xy" and (pos - 1) % 4 == 0)
x = pack(" b b Xd b Xb x", 1, 2, 3)
assert(packsize(" b b Xd b Xb x") == 4)
assert(x == "\1\2\3\0")
a, b, c, pos = unpack("bbXdb", x)
assert(a == 1 and b == 2 and c == 3 and pos == #x)
-- only alignment
assert(packsize("!8 xXi8") == 8)
local pos = unpack("!8 xXi8", "0123456701234567"); assert(pos == 9)
assert(packsize("!8 xXi2") == 2)
local pos = unpack("!8 xXi2", "0123456701234567"); assert(pos == 3)
assert(packsize("!2 xXi2") == 2)
local pos = unpack("!2 xXi2", "0123456701234567"); assert(pos == 3)
assert(packsize("!2 xXi8") == 2)
local pos = unpack("!2 xXi8", "0123456701234567"); assert(pos == 3)
assert(packsize("!16 xXi16") == 16)
local pos = unpack("!16 xXi16", "0123456701234567"); assert(pos == 17)
checkerror("invalid next option", pack, "X")
checkerror("invalid next option", unpack, "XXi", "")
checkerror("invalid next option", unpack, "X i", "")
checkerror("invalid next option", pack, "Xc1")
end
do -- testing initial position
local x = pack("i4i4i4i4", 1, 2, 3, 4)
for pos = 1, 16, 4 do
local i, p = unpack("i4", x, pos)
assert(i == pos//4 + 1 and p == pos + 4)
end
-- with alignment
for pos = 0, 12 do -- will always round position to power of 2
local i, p = unpack("!4 i4", x, pos + 1)
assert(i == (pos + 3)//4 + 1 and p == i*4 + 1)
end
-- negative indices
local i, p = unpack("!4 i4", x, -4)
assert(i == 4 and p == 17)
local i, p = unpack("!4 i4", x, -7)
assert(i == 4 and p == 17)
local i, p = unpack("!4 i4", x, -#x)
assert(i == 1 and p == 5)
-- limits
for i = 1, #x + 1 do
assert(unpack("c0", x, i) == "")
end
checkerror("out of string", unpack, "c0", x, #x + 2)
end
print "OK"

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-- track collections
local M = {}
-- import list
local setmetatable, stderr, collectgarbage =
setmetatable, io.stderr, collectgarbage
_ENV = nil
local active = false
-- each time a table is collected, remark it for finalization on next
-- cycle
local mt = {}
function mt.__gc (o)
stderr:write'.' -- mark progress
if active then
setmetatable(o, mt) -- remark object for finalization
end
end
function M.start ()
if not active then
active = true
setmetatable({}, mt) -- create initial object
end
end
function M.stop ()
if active then
active = false
collectgarbage() -- call finalizer for the last time
end
end
return M

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-- $Id: testes/utf8.lua $
-- See Copyright Notice in file all.lua
-- UTF-8 file
print "testing UTF-8 library"
local utf8 = require'utf8'
local function checkerror (msg, f, ...)
local s, err = pcall(f, ...)
assert(not s and string.find(err, msg))
end
local function len (s)
return #string.gsub(s, "[\x80-\xBF]", "")
end
local justone = "^" .. utf8.charpattern .. "$"
-- 't' is the list of codepoints of 's'
local function checksyntax (s, t)
-- creates a string "return '\u{t[1]}...\u{t[n]}'"
local ts = {"return '"}
for i = 1, #t do ts[i + 1] = string.format("\\u{%x}", t[i]) end
ts[#t + 2] = "'"
ts = table.concat(ts)
-- its execution should result in 's'
assert(assert(load(ts))() == s)
end
assert(not utf8.offset("alo", 5))
assert(not utf8.offset("alo", -4))
-- 'check' makes several tests over the validity of string 's'.
-- 't' is the list of codepoints of 's'.
local function check (s, t, nonstrict)
local l = utf8.len(s, 1, -1, nonstrict)
assert(#t == l and len(s) == l)
assert(utf8.char(table.unpack(t)) == s) -- 't' and 's' are equivalent
assert(utf8.offset(s, 0) == 1)
checksyntax(s, t)
-- creates new table with all codepoints of 's'
local t1 = {utf8.codepoint(s, 1, -1, nonstrict)}
assert(#t == #t1)
for i = 1, #t do assert(t[i] == t1[i]) end -- 't' is equal to 't1'
for i = 1, l do -- for all codepoints
local pi = utf8.offset(s, i) -- position of i-th char
local pi1 = utf8.offset(s, 2, pi) -- position of next char
assert(string.find(string.sub(s, pi, pi1 - 1), justone))
assert(utf8.offset(s, -1, pi1) == pi)
assert(utf8.offset(s, i - l - 1) == pi)
assert(pi1 - pi == #utf8.char(utf8.codepoint(s, pi, pi, nonstrict)))
for j = pi, pi1 - 1 do
assert(utf8.offset(s, 0, j) == pi)
end
for j = pi + 1, pi1 - 1 do
assert(not utf8.len(s, j))
end
assert(utf8.len(s, pi, pi, nonstrict) == 1)
assert(utf8.len(s, pi, pi1 - 1, nonstrict) == 1)
assert(utf8.len(s, pi, -1, nonstrict) == l - i + 1)
assert(utf8.len(s, pi1, -1, nonstrict) == l - i)
assert(utf8.len(s, 1, pi, nonstrict) == i)
end
local i = 0
for p, c in utf8.codes(s, nonstrict) do
i = i + 1
assert(c == t[i] and p == utf8.offset(s, i))
assert(utf8.codepoint(s, p, p, nonstrict) == c)
end
assert(i == #t)
i = 0
for c in string.gmatch(s, utf8.charpattern) do
i = i + 1
assert(c == utf8.char(t[i]))
end
assert(i == #t)
for i = 1, l do
assert(utf8.offset(s, i) == utf8.offset(s, i - l - 1, #s + 1))
end
end
do -- error indication in utf8.len
local function check (s, p)
local a, b = utf8.len(s)
assert(not a and b == p)
end
check("abc\xE3def", 4)
check("\xF4\x9F\xBF", 1)
check("\xF4\x9F\xBF\xBF", 1)
-- spurious continuation bytes
check("汉字\x80", #("汉字") + 1)
check("\x80hello", 1)
check("hel\x80lo", 4)
check("汉字\xBF", #("汉字") + 1)
check("\xBFhello", 1)
check("hel\xBFlo", 4)
end
-- errors in utf8.codes
do
local function errorcodes (s)
checkerror("invalid UTF%-8 code",
function ()
for c in utf8.codes(s) do assert(c) end
end)
end
errorcodes("ab\xff")
errorcodes("\u{110000}")
errorcodes("in\x80valid")
errorcodes("\xbfinvalid")
errorcodes("αλφ\xBFα")
-- calling interation function with invalid arguments
local f = utf8.codes("")
assert(f("", 2) == nil)
assert(f("", -1) == nil)
assert(f("", math.mininteger) == nil)
end
-- error in initial position for offset
checkerror("position out of bounds", utf8.offset, "abc", 1, 5)
checkerror("position out of bounds", utf8.offset, "abc", 1, -4)
checkerror("position out of bounds", utf8.offset, "", 1, 2)
checkerror("position out of bounds", utf8.offset, "", 1, -1)
checkerror("continuation byte", utf8.offset, "𦧺", 1, 2)
checkerror("continuation byte", utf8.offset, "𦧺", 1, 2)
checkerror("continuation byte", utf8.offset, "\x80", 1)
-- error in indices for len
checkerror("out of bounds", utf8.len, "abc", 0, 2)
checkerror("out of bounds", utf8.len, "abc", 1, 4)
local s = "hello World"
local t = {string.byte(s, 1, -1)}
for i = 1, utf8.len(s) do assert(t[i] == string.byte(s, i)) end
check(s, t)
check("汉字/漢字", {27721, 23383, 47, 28450, 23383,})
do
local s = "áéí\128"
local t = {utf8.codepoint(s,1,#s - 1)}
assert(#t == 3 and t[1] == 225 and t[2] == 233 and t[3] == 237)
checkerror("invalid UTF%-8 code", utf8.codepoint, s, 1, #s)
checkerror("out of bounds", utf8.codepoint, s, #s + 1)
t = {utf8.codepoint(s, 4, 3)}
assert(#t == 0)
checkerror("out of bounds", utf8.codepoint, s, -(#s + 1), 1)
checkerror("out of bounds", utf8.codepoint, s, 1, #s + 1)
-- surrogates
assert(utf8.codepoint("\u{D7FF}") == 0xD800 - 1)
assert(utf8.codepoint("\u{E000}") == 0xDFFF + 1)
assert(utf8.codepoint("\u{D800}", 1, 1, true) == 0xD800)
assert(utf8.codepoint("\u{DFFF}", 1, 1, true) == 0xDFFF)
assert(utf8.codepoint("\u{7FFFFFFF}", 1, 1, true) == 0x7FFFFFFF)
end
assert(utf8.char() == "")
assert(utf8.char(0, 97, 98, 99, 1) == "\0abc\1")
assert(utf8.codepoint(utf8.char(0x10FFFF)) == 0x10FFFF)
assert(utf8.codepoint(utf8.char(0x7FFFFFFF), 1, 1, true) == (1<<31) - 1)
checkerror("value out of range", utf8.char, 0x7FFFFFFF + 1)
checkerror("value out of range", utf8.char, -1)
local function invalid (s)
checkerror("invalid UTF%-8 code", utf8.codepoint, s)
assert(not utf8.len(s))
end
-- UTF-8 representation for 0x11ffff (value out of valid range)
invalid("\xF4\x9F\xBF\xBF")
-- surrogates
invalid("\u{D800}")
invalid("\u{DFFF}")
-- overlong sequences
invalid("\xC0\x80") -- zero
invalid("\xC1\xBF") -- 0x7F (should be coded in 1 byte)
invalid("\xE0\x9F\xBF") -- 0x7FF (should be coded in 2 bytes)
invalid("\xF0\x8F\xBF\xBF") -- 0xFFFF (should be coded in 3 bytes)
-- invalid bytes
invalid("\x80") -- continuation byte
invalid("\xBF") -- continuation byte
invalid("\xFE") -- invalid byte
invalid("\xFF") -- invalid byte
-- empty string
check("", {})
-- minimum and maximum values for each sequence size
s = "\0 \x7F\z
\xC2\x80 \xDF\xBF\z
\xE0\xA0\x80 \xEF\xBF\xBF\z
\xF0\x90\x80\x80 \xF4\x8F\xBF\xBF"
s = string.gsub(s, " ", "")
check(s, {0,0x7F, 0x80,0x7FF, 0x800,0xFFFF, 0x10000,0x10FFFF})
do
-- original UTF-8 values
local s = "\u{4000000}\u{7FFFFFFF}"
assert(#s == 12)
check(s, {0x4000000, 0x7FFFFFFF}, true)
s = "\u{200000}\u{3FFFFFF}"
assert(#s == 10)
check(s, {0x200000, 0x3FFFFFF}, true)
s = "\u{10000}\u{1fffff}"
assert(#s == 8)
check(s, {0x10000, 0x1FFFFF}, true)
end
local x = "日本語a-4\0éó"
check(x, {26085, 26412, 35486, 97, 45, 52, 0, 233, 243})
-- Supplementary Characters
check("𣲷𠜎𠱓𡁻𠵼ab𠺢",
{0x23CB7, 0x2070E, 0x20C53, 0x2107B, 0x20D7C, 0x61, 0x62, 0x20EA2,})
check("𨳊𩶘𦧺𨳒𥄫𤓓\xF4\x8F\xBF\xBF",
{0x28CCA, 0x29D98, 0x269FA, 0x28CD2, 0x2512B, 0x244D3, 0x10ffff})
local i = 0
for p, c in string.gmatch(x, "()(" .. utf8.charpattern .. ")") do
i = i + 1
assert(utf8.offset(x, i) == p)
assert(utf8.len(x, p) == utf8.len(x) - i + 1)
assert(utf8.len(c) == 1)
for j = 1, #c - 1 do
assert(utf8.offset(x, 0, p + j - 1) == p)
end
end
print'ok'

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-- $Id: testes/vararg.lua $
-- See Copyright Notice in file all.lua
print('testing vararg')
local function f (a, ...)
local x = {n = select('#', ...), ...}
for i = 1, x.n do assert(a[i] == x[i]) end
return x.n
end
local function c12 (...)
assert(arg == _G.arg) -- no local 'arg'
local x = {...}; x.n = #x
local res = (x.n==2 and x[1] == 1 and x[2] == 2)
if res then res = 55 end
return res, 2
end
local function vararg (...) return {n = select('#', ...), ...} end
local call = function (f, args) return f(table.unpack(args, 1, args.n)) end
assert(f() == 0)
assert(f({1,2,3}, 1, 2, 3) == 3)
assert(f({"alo", nil, 45, f, nil}, "alo", nil, 45, f, nil) == 5)
assert(vararg().n == 0)
assert(vararg(nil, nil).n == 2)
assert(c12(1,2)==55)
local a,b = assert(call(c12, {1,2}))
assert(a == 55 and b == 2)
a = call(c12, {1,2;n=2})
assert(a == 55 and b == 2)
a = call(c12, {1,2;n=1})
assert(not a)
assert(c12(1,2,3) == false)
local a = vararg(call(next, {_G,nil;n=2}))
local b,c = next(_G)
assert(a[1] == b and a[2] == c and a.n == 2)
a = vararg(call(call, {c12, {1,2}}))
assert(a.n == 2 and a[1] == 55 and a[2] == 2)
a = call(print, {'+'})
assert(a == nil)
local t = {1, 10}
function t:f (...) local arg = {...}; return self[...]+#arg end
assert(t:f(1,4) == 3 and t:f(2) == 11)
print('+')
local lim = 20
local i, a = 1, {}
while i <= lim do a[i] = i+0.3; i=i+1 end
function f(a, b, c, d, ...)
local more = {...}
assert(a == 1.3 and more[1] == 5.3 and
more[lim-4] == lim+0.3 and not more[lim-3])
end
local function g (a,b,c)
assert(a == 1.3 and b == 2.3 and c == 3.3)
end
call(f, a)
call(g, a)
a = {}
i = 1
while i <= lim do a[i] = i; i=i+1 end
assert(call(math.max, a) == lim)
print("+")
-- new-style varargs
local function oneless (a, ...) return ... end
function f (n, a, ...)
local b
assert(arg == _G.arg) -- no local 'arg'
if n == 0 then
local b, c, d = ...
return a, b, c, d, oneless(oneless(oneless(...)))
else
n, b, a = n-1, ..., a
assert(b == ...)
return f(n, a, ...)
end
end
a,b,c,d,e = assert(f(10,5,4,3,2,1))
assert(a==5 and b==4 and c==3 and d==2 and e==1)
a,b,c,d,e = f(4)
assert(a==nil and b==nil and c==nil and d==nil and e==nil)
-- varargs for main chunks
local f = load[[ return {...} ]]
local x = f(2,3)
assert(x[1] == 2 and x[2] == 3 and x[3] == undef)
f = load[[
local x = {...}
for i=1,select('#', ...) do assert(x[i] == select(i, ...)) end
assert(x[select('#', ...)+1] == undef)
return true
]]
assert(f("a", "b", nil, {}, assert))
assert(f())
a = {select(3, table.unpack{10,20,30,40})}
assert(#a == 2 and a[1] == 30 and a[2] == 40)
a = {select(1)}
assert(next(a) == nil)
a = {select(-1, 3, 5, 7)}
assert(a[1] == 7 and a[2] == undef)
a = {select(-2, 3, 5, 7)}
assert(a[1] == 5 and a[2] == 7 and a[3] == undef)
pcall(select, 10000)
pcall(select, -10000)
-- bug in 5.2.2
function f(p1, p2, p3, p4, p5, p6, p7, p8, p9, p10,
p11, p12, p13, p14, p15, p16, p17, p18, p19, p20,
p21, p22, p23, p24, p25, p26, p27, p28, p29, p30,
p31, p32, p33, p34, p35, p36, p37, p38, p39, p40,
p41, p42, p43, p44, p45, p46, p48, p49, p50, ...)
local a1,a2,a3,a4,a5,a6,a7
local a8,a9,a10,a11,a12,a13,a14
end
-- assertion fail here
f()
-- missing arguments in tail call
do
local function f(a,b,c) return c, b end
local function g() return f(1,2) end
local a, b = g()
assert(a == nil and b == 2)
end
print('OK')

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-- $Id: testes/verybig.lua $
-- See Copyright Notice in file all.lua
print "testing RK"
-- testing opcodes with RK arguments larger than K limit
local function foo ()
local dummy = {
-- fill first 256 entries in table of constants
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64,
65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80,
81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96,
97, 98, 99, 100, 101, 102, 103, 104,
105, 106, 107, 108, 109, 110, 111, 112,
113, 114, 115, 116, 117, 118, 119, 120,
121, 122, 123, 124, 125, 126, 127, 128,
129, 130, 131, 132, 133, 134, 135, 136,
137, 138, 139, 140, 141, 142, 143, 144,
145, 146, 147, 148, 149, 150, 151, 152,
153, 154, 155, 156, 157, 158, 159, 160,
161, 162, 163, 164, 165, 166, 167, 168,
169, 170, 171, 172, 173, 174, 175, 176,
177, 178, 179, 180, 181, 182, 183, 184,
185, 186, 187, 188, 189, 190, 191, 192,
193, 194, 195, 196, 197, 198, 199, 200,
201, 202, 203, 204, 205, 206, 207, 208,
209, 210, 211, 212, 213, 214, 215, 216,
217, 218, 219, 220, 221, 222, 223, 224,
225, 226, 227, 228, 229, 230, 231, 232,
233, 234, 235, 236, 237, 238, 239, 240,
241, 242, 243, 244, 245, 246, 247, 248,
249, 250, 251, 252, 253, 254, 255, 256,
}
assert(24.5 + 0.6 == 25.1)
local t = {foo = function (self, x) return x + self.x end, x = 10}
t.t = t
assert(t:foo(1.5) == 11.5)
assert(t.t:foo(0.5) == 10.5) -- bug in 5.2 alpha
assert(24.3 == 24.3)
assert((function () return t.x end)() == 10)
end
foo()
foo = nil
if _soft then return 10 end
print "testing large programs (>64k)"
-- template to create a very big test file
local prog = [[$
local a,b
b = {$1$
b30009 = 65534,
b30010 = 65535,
b30011 = 65536,
b30012 = 65537,
b30013 = 16777214,
b30014 = 16777215,
b30015 = 16777216,
b30016 = 16777217,
b30017 = 0x7fffff,
b30018 = -0x7fffff,
b30019 = 0x1ffffff,
b30020 = -0x1ffffd,
b30021 = -65534,
b30022 = -65535,
b30023 = -65536,
b30024 = -0xffffff,
b30025 = 15012.5,
$2$
};
assert(b.a50008 == 25004 and b["a11"] == -5.5)
assert(b.a33007 == -16503.5 and b.a50009 == -25004.5)
assert(b["b"..30024] == -0xffffff)
function b:xxx (a,b) return a+b end
assert(b:xxx(10, 12) == 22) -- pushself with non-constant index
b["xxx"] = undef
local s = 0; local n=0
for a,b in pairs(b) do s=s+b; n=n+1 end
-- with 32-bit floats, exact value of 's' depends on summation order
assert(81800000.0 < s and s < 81860000 and n == 70001)
a = nil; b = nil
print'+'
local function f(x) b=x end
a = f{$3$} or 10
assert(a==10)
assert(b[1] == "a10" and b[2] == 5 and b[#b-1] == "a50009")
function xxxx (x) return b[x] end
assert(xxxx(3) == "a11")
a = nil; b=nil
xxxx = nil
return 10
]]
-- functions to fill in the $n$
local function sig (x)
return (x % 2 == 0) and '' or '-'
end
local F = {
function () -- $1$
for i=10,50009 do
io.write('a', i, ' = ', sig(i), 5+((i-10)/2), ',\n')
end
end,
function () -- $2$
for i=30026,50009 do
io.write('b', i, ' = ', sig(i), 15013+((i-30026)/2), ',\n')
end
end,
function () -- $3$
for i=10,50009 do
io.write('"a', i, '", ', sig(i), 5+((i-10)/2), ',\n')
end
end,
}
local file = os.tmpname()
io.output(file)
for s in string.gmatch(prog, "$([^$]+)") do
local n = tonumber(s)
if not n then io.write(s) else F[n]() end
end
io.close()
local result = dofile(file)
assert(os.remove(file))
print'OK'
return result

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# Makefile for installing Lua
# See doc/readme.html for installation and customization instructions.
# == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
# Your platform. See PLATS for possible values.
PLAT= guess
# Where to install. The installation starts in the src and doc directories,
# so take care if INSTALL_TOP is not an absolute path. See the local target.
# You may want to make INSTALL_LMOD and INSTALL_CMOD consistent with
# LUA_ROOT, LUA_LDIR, and LUA_CDIR in luaconf.h.
INSTALL_TOP= /usr/local
INSTALL_BIN= $(INSTALL_TOP)/bin
INSTALL_INC= $(INSTALL_TOP)/include
INSTALL_LIB= $(INSTALL_TOP)/lib
INSTALL_MAN= $(INSTALL_TOP)/man/man1
INSTALL_LMOD= $(INSTALL_TOP)/share/lua/$V
INSTALL_CMOD= $(INSTALL_TOP)/lib/lua/$V
# How to install. If your install program does not support "-p", then
# you may have to run ranlib on the installed liblua.a.
INSTALL= install -p
INSTALL_EXEC= $(INSTALL) -m 0755
INSTALL_DATA= $(INSTALL) -m 0644
#
# If you don't have "install" you can use "cp" instead.
# INSTALL= cp -p
# INSTALL_EXEC= $(INSTALL)
# INSTALL_DATA= $(INSTALL)
# Other utilities.
MKDIR= mkdir -p
RM= rm -f
# == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
# Convenience platforms targets.
PLATS= guess aix bsd c89 freebsd generic ios linux linux-readline macosx mingw posix solaris
# What to install.
TO_BIN= lua luac
TO_INC= lua.h luaconf.h lualib.h lauxlib.h lua.hpp
TO_LIB= liblua.a
TO_MAN= lua.1 luac.1
# Lua version and release.
V= 5.4
R= $V.7
# Targets start here.
all: $(PLAT)
$(PLATS) help test clean:
@cd src && $(MAKE) $@
install: dummy
cd src && $(MKDIR) $(INSTALL_BIN) $(INSTALL_INC) $(INSTALL_LIB) $(INSTALL_MAN) $(INSTALL_LMOD) $(INSTALL_CMOD)
cd src && $(INSTALL_EXEC) $(TO_BIN) $(INSTALL_BIN)
cd src && $(INSTALL_DATA) $(TO_INC) $(INSTALL_INC)
cd src && $(INSTALL_DATA) $(TO_LIB) $(INSTALL_LIB)
cd doc && $(INSTALL_DATA) $(TO_MAN) $(INSTALL_MAN)
uninstall:
cd src && cd $(INSTALL_BIN) && $(RM) $(TO_BIN)
cd src && cd $(INSTALL_INC) && $(RM) $(TO_INC)
cd src && cd $(INSTALL_LIB) && $(RM) $(TO_LIB)
cd doc && cd $(INSTALL_MAN) && $(RM) $(TO_MAN)
local:
$(MAKE) install INSTALL_TOP=../install
# make may get confused with install/ if it does not support .PHONY.
dummy:
# Echo config parameters.
echo:
@cd src && $(MAKE) -s echo
@echo "PLAT= $(PLAT)"
@echo "V= $V"
@echo "R= $R"
@echo "TO_BIN= $(TO_BIN)"
@echo "TO_INC= $(TO_INC)"
@echo "TO_LIB= $(TO_LIB)"
@echo "TO_MAN= $(TO_MAN)"
@echo "INSTALL_TOP= $(INSTALL_TOP)"
@echo "INSTALL_BIN= $(INSTALL_BIN)"
@echo "INSTALL_INC= $(INSTALL_INC)"
@echo "INSTALL_LIB= $(INSTALL_LIB)"
@echo "INSTALL_MAN= $(INSTALL_MAN)"
@echo "INSTALL_LMOD= $(INSTALL_LMOD)"
@echo "INSTALL_CMOD= $(INSTALL_CMOD)"
@echo "INSTALL_EXEC= $(INSTALL_EXEC)"
@echo "INSTALL_DATA= $(INSTALL_DATA)"
# Echo pkg-config data.
pc:
@echo "version=$R"
@echo "prefix=$(INSTALL_TOP)"
@echo "libdir=$(INSTALL_LIB)"
@echo "includedir=$(INSTALL_INC)"
# Targets that do not create files (not all makes understand .PHONY).
.PHONY: all $(PLATS) help test clean install uninstall local dummy echo pc
# (end of Makefile)

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This is Lua 5.4.7, released on 13 Jun 2024.
For installation instructions, license details, and
further information about Lua, see doc/readme.html.

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Lua 5.4 Reference Manual - contents</TITLE>
<LINK REL="stylesheet" TYPE="text/css" HREF="lua.css">
<LINK REL="stylesheet" TYPE="text/css" HREF="index.css">
<META HTTP-EQUIV="content-type" CONTENT="text/html; charset=iso-8859-1">
</HEAD>
<BODY>
<H1>
<A HREF="https://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
Lua 5.4 Reference Manual
</H1>
<P>
The reference manual is the official definition of the Lua language.
<BR>
For a complete introduction to Lua programming, see the book
<A HREF="https://www.lua.org/pil/">Programming in Lua</A>.
<DIV CLASS="menubar">
<A HREF="manual.html">start</A>
&middot;
<A HREF="#contents">contents</A>
&middot;
<A HREF="#index">index</A>
&middot;
<A HREF="https://www.lua.org/manual/">other versions</A>
</DIV>
<P>
<SMALL>
Copyright &copy; 2020&ndash;2024 Lua.org, PUC-Rio.
Freely available under the terms of the
<A HREF="https://www.lua.org/license.html">Lua license</A>.
</SMALL>
<H2><A NAME="contents">Contents</A></H2>
<UL CLASS="contents menubar">
<LI><A HREF="manual.html">1 &ndash; Introduction</A>
<P>
<LI><A HREF="manual.html#2">2 &ndash; Basic Concepts</A>
<UL>
<LI><A HREF="manual.html#2.1">2.1 &ndash; Values and Types</A>
<LI><A HREF="manual.html#2.2">2.2 &ndash; Environments and the Global Environment</A>
<LI><A HREF="manual.html#2.3">2.3 &ndash; Error Handling</A>
<LI><A HREF="manual.html#2.4">2.4 &ndash; Metatables and Metamethods</A>
<LI><A HREF="manual.html#2.5">2.5 &ndash; Garbage Collection</A>
<UL>
<LI><A HREF="manual.html#2.5.1">2.5.1 &ndash; Incremental Garbage Collection</A>
<LI><A HREF="manual.html#2.5.2">2.5.2 &ndash; Generational Garbage Collection</A>
<LI><A HREF="manual.html#2.5.3">2.5.3 &ndash; Garbage-Collection Metamethods</A>
<LI><A HREF="manual.html#2.5.4">2.5.4 &ndash; Weak Tables</A>
</UL>
<LI><A HREF="manual.html#2.6">2.6 &ndash; Coroutines</A>
</UL>
<P>
<LI><A HREF="manual.html#3">3 &ndash; The Language</A>
<UL>
<LI><A HREF="manual.html#3.1">3.1 &ndash; Lexical Conventions</A>
<LI><A HREF="manual.html#3.2">3.2 &ndash; Variables</A>
<LI><A HREF="manual.html#3.3">3.3 &ndash; Statements</A>
<UL>
<LI><A HREF="manual.html#3.3.1">3.3.1 &ndash; Blocks</A>
<LI><A HREF="manual.html#3.3.2">3.3.2 &ndash; Chunks</A>
<LI><A HREF="manual.html#3.3.3">3.3.3 &ndash; Assignment</A>
<LI><A HREF="manual.html#3.3.4">3.3.4 &ndash; Control Structures</A>
<LI><A HREF="manual.html#3.3.5">3.3.5 &ndash; For Statement</A>
<LI><A HREF="manual.html#3.3.6">3.3.6 &ndash; Function Calls as Statements</A>
<LI><A HREF="manual.html#3.3.7">3.3.7 &ndash; Local Declarations</A>
<LI><A HREF="manual.html#3.3.8">3.3.8 &ndash; To-be-closed Variables</A>
</UL>
<LI><A HREF="manual.html#3.4">3.4 &ndash; Expressions</A>
<UL>
<LI><A HREF="manual.html#3.4.1">3.4.1 &ndash; Arithmetic Operators</A>
<LI><A HREF="manual.html#3.4.2">3.4.2 &ndash; Bitwise Operators</A>
<LI><A HREF="manual.html#3.4.3">3.4.3 &ndash; Coercions and Conversions</A>
<LI><A HREF="manual.html#3.4.4">3.4.4 &ndash; Relational Operators</A>
<LI><A HREF="manual.html#3.4.5">3.4.5 &ndash; Logical Operators</A>
<LI><A HREF="manual.html#3.4.6">3.4.6 &ndash; Concatenation</A>
<LI><A HREF="manual.html#3.4.7">3.4.7 &ndash; The Length Operator</A>
<LI><A HREF="manual.html#3.4.8">3.4.8 &ndash; Precedence</A>
<LI><A HREF="manual.html#3.4.9">3.4.9 &ndash; Table Constructors</A>
<LI><A HREF="manual.html#3.4.10">3.4.10 &ndash; Function Calls</A>
<LI><A HREF="manual.html#3.4.11">3.4.11 &ndash; Function Definitions</A>
<LI><A HREF="manual.html#3.4.12">3.4.12 &ndash; Lists of expressions, multiple results, and adjustment<A>
</UL>
<LI><A HREF="manual.html#3.5">3.5 &ndash; Visibility Rules</A>
</UL>
<P>
<LI><A HREF="manual.html#4">4 &ndash; The Application Program Interface</A>
<UL>
<LI><A HREF="manual.html#4.1">4.1 &ndash; The Stack</A>
<UL>
<LI><A HREF="manual.html#4.1.1">4.1.1 &ndash; Stack Size</A>
<LI><A HREF="manual.html#4.1.2">4.1.2 &ndash; Valid and Acceptable Indices</A>
<LI><A HREF="manual.html#4.1.3">4.1.3 &ndash; Pointers to strings</A>
</UL>
<LI><A HREF="manual.html#4.2">4.2 &ndash; C Closures</A>
<LI><A HREF="manual.html#4.3">4.3 &ndash; Registry</A>
<LI><A HREF="manual.html#4.4">4.4 &ndash; Error Handling in C</A>
<UL>
<LI><A HREF="manual.html#4.4.1">4.4.1 &ndash; Status Codes</A>
</UL>
<LI><A HREF="manual.html#4.5">4.5 &ndash; Handling Yields in C</A>
<LI><A HREF="manual.html#4.6">4.6 &ndash; Functions and Types</A>
<LI><A HREF="manual.html#4.7">4.7 &ndash; The Debug Interface</A>
</UL>
<P>
<LI><A HREF="manual.html#5">5 &ndash; The Auxiliary Library</A>
<UL>
<LI><A HREF="manual.html#5.1">5.1 &ndash; Functions and Types</A>
</UL>
<P>
<LI><A HREF="manual.html#6">6 &ndash; The Standard Libraries</A>
<UL>
<LI><A HREF="manual.html#6.1">6.1 &ndash; Basic Functions</A>
<LI><A HREF="manual.html#6.2">6.2 &ndash; Coroutine Manipulation</A>
<LI><A HREF="manual.html#6.3">6.3 &ndash; Modules</A>
<LI><A HREF="manual.html#6.4">6.4 &ndash; String Manipulation</A>
<UL>
<LI><A HREF="manual.html#6.4.1">6.4.1 &ndash; Patterns</A>
<LI><A HREF="manual.html#6.4.2">6.4.2 &ndash; Format Strings for Pack and Unpack</A>
</UL>
<LI><A HREF="manual.html#6.5">6.5 &ndash; UTF-8 Support</A>
<LI><A HREF="manual.html#6.6">6.6 &ndash; Table Manipulation</A>
<LI><A HREF="manual.html#6.7">6.7 &ndash; Mathematical Functions</A>
<LI><A HREF="manual.html#6.8">6.8 &ndash; Input and Output Facilities</A>
<LI><A HREF="manual.html#6.9">6.9 &ndash; Operating System Facilities</A>
<LI><A HREF="manual.html#6.10">6.10 &ndash; The Debug Library</A>
</UL>
<P>
<LI><A HREF="manual.html#7">7 &ndash; Lua Standalone</A>
<P>
<LI><A HREF="manual.html#8">8 &ndash; Incompatibilities with the Previous Version</A>
<UL>
<LI><A HREF="manual.html#8.1">8.1 &ndash; Incompatibilities in the Language</A>
<LI><A HREF="manual.html#8.2">8.2 &ndash; Incompatibilities in the Libraries</A>
<LI><A HREF="manual.html#8.3">8.3 &ndash; Incompatibilities in the API</A>
</UL>
<P>
<LI><A HREF="manual.html#9">9 &ndash; The Complete Syntax of Lua</A>
</UL>
<H2><A NAME="index">Index</A></H2>
<TABLE CLASS="menubar" WIDTH="100%">
<TR>
<TD>
<H3><A NAME="functions">Lua functions</A></H3>
<P>
<A HREF="manual.html#6.1">basic</A><BR>
<A HREF="manual.html#pdf-_G">_G</A><BR>
<A HREF="manual.html#pdf-_VERSION">_VERSION</A><BR>
<A HREF="manual.html#pdf-assert">assert</A><BR>
<A HREF="manual.html#pdf-collectgarbage">collectgarbage</A><BR>
<A HREF="manual.html#pdf-dofile">dofile</A><BR>
<A HREF="manual.html#pdf-error">error</A><BR>
<A HREF="manual.html#pdf-getmetatable">getmetatable</A><BR>
<A HREF="manual.html#pdf-ipairs">ipairs</A><BR>
<A HREF="manual.html#pdf-load">load</A><BR>
<A HREF="manual.html#pdf-loadfile">loadfile</A><BR>
<A HREF="manual.html#pdf-next">next</A><BR>
<A HREF="manual.html#pdf-pairs">pairs</A><BR>
<A HREF="manual.html#pdf-pcall">pcall</A><BR>
<A HREF="manual.html#pdf-print">print</A><BR>
<A HREF="manual.html#pdf-rawequal">rawequal</A><BR>
<A HREF="manual.html#pdf-rawget">rawget</A><BR>
<A HREF="manual.html#pdf-rawlen">rawlen</A><BR>
<A HREF="manual.html#pdf-rawset">rawset</A><BR>
<A HREF="manual.html#pdf-require">require</A><BR>
<A HREF="manual.html#pdf-select">select</A><BR>
<A HREF="manual.html#pdf-setmetatable">setmetatable</A><BR>
<A HREF="manual.html#pdf-tonumber">tonumber</A><BR>
<A HREF="manual.html#pdf-tostring">tostring</A><BR>
<A HREF="manual.html#pdf-type">type</A><BR>
<A HREF="manual.html#pdf-warn">warn</A><BR>
<A HREF="manual.html#pdf-xpcall">xpcall</A><BR>
<P>
<A HREF="manual.html#6.2">coroutine</A><BR>
<A HREF="manual.html#pdf-coroutine.close">coroutine.close</A><BR>
<A HREF="manual.html#pdf-coroutine.create">coroutine.create</A><BR>
<A HREF="manual.html#pdf-coroutine.isyieldable">coroutine.isyieldable</A><BR>
<A HREF="manual.html#pdf-coroutine.resume">coroutine.resume</A><BR>
<A HREF="manual.html#pdf-coroutine.running">coroutine.running</A><BR>
<A HREF="manual.html#pdf-coroutine.status">coroutine.status</A><BR>
<A HREF="manual.html#pdf-coroutine.wrap">coroutine.wrap</A><BR>
<A HREF="manual.html#pdf-coroutine.yield">coroutine.yield</A><BR>
<P>
<A HREF="manual.html#6.10">debug</A><BR>
<A HREF="manual.html#pdf-debug.debug">debug.debug</A><BR>
<A HREF="manual.html#pdf-debug.gethook">debug.gethook</A><BR>
<A HREF="manual.html#pdf-debug.getinfo">debug.getinfo</A><BR>
<A HREF="manual.html#pdf-debug.getlocal">debug.getlocal</A><BR>
<A HREF="manual.html#pdf-debug.getmetatable">debug.getmetatable</A><BR>
<A HREF="manual.html#pdf-debug.getregistry">debug.getregistry</A><BR>
<A HREF="manual.html#pdf-debug.getupvalue">debug.getupvalue</A><BR>
<A HREF="manual.html#pdf-debug.getuservalue">debug.getuservalue</A><BR>
<A HREF="manual.html#pdf-debug.sethook">debug.sethook</A><BR>
<A HREF="manual.html#pdf-debug.setlocal">debug.setlocal</A><BR>
<A HREF="manual.html#pdf-debug.setmetatable">debug.setmetatable</A><BR>
<A HREF="manual.html#pdf-debug.setupvalue">debug.setupvalue</A><BR>
<A HREF="manual.html#pdf-debug.setuservalue">debug.setuservalue</A><BR>
<A HREF="manual.html#pdf-debug.traceback">debug.traceback</A><BR>
<A HREF="manual.html#pdf-debug.upvalueid">debug.upvalueid</A><BR>
<A HREF="manual.html#pdf-debug.upvaluejoin">debug.upvaluejoin</A><BR>
<P>
<A HREF="manual.html#6.8">io</A><BR>
<A HREF="manual.html#pdf-io.close">io.close</A><BR>
<A HREF="manual.html#pdf-io.flush">io.flush</A><BR>
<A HREF="manual.html#pdf-io.input">io.input</A><BR>
<A HREF="manual.html#pdf-io.lines">io.lines</A><BR>
<A HREF="manual.html#pdf-io.open">io.open</A><BR>
<A HREF="manual.html#pdf-io.output">io.output</A><BR>
<A HREF="manual.html#pdf-io.popen">io.popen</A><BR>
<A HREF="manual.html#pdf-io.read">io.read</A><BR>
<A HREF="manual.html#pdf-io.stderr">io.stderr</A><BR>
<A HREF="manual.html#pdf-io.stdin">io.stdin</A><BR>
<A HREF="manual.html#pdf-io.stdout">io.stdout</A><BR>
<A HREF="manual.html#pdf-io.tmpfile">io.tmpfile</A><BR>
<A HREF="manual.html#pdf-io.type">io.type</A><BR>
<A HREF="manual.html#pdf-io.write">io.write</A><BR>
<A HREF="manual.html#pdf-file:close">file:close</A><BR>
<A HREF="manual.html#pdf-file:flush">file:flush</A><BR>
<A HREF="manual.html#pdf-file:lines">file:lines</A><BR>
<A HREF="manual.html#pdf-file:read">file:read</A><BR>
<A HREF="manual.html#pdf-file:seek">file:seek</A><BR>
<A HREF="manual.html#pdf-file:setvbuf">file:setvbuf</A><BR>
<A HREF="manual.html#pdf-file:write">file:write</A><BR>
</TD>
<TD>
<H3>&nbsp;</H3>
<P>
<A HREF="manual.html#6.7">math</A><BR>
<A HREF="manual.html#pdf-math.abs">math.abs</A><BR>
<A HREF="manual.html#pdf-math.acos">math.acos</A><BR>
<A HREF="manual.html#pdf-math.asin">math.asin</A><BR>
<A HREF="manual.html#pdf-math.atan">math.atan</A><BR>
<A HREF="manual.html#pdf-math.ceil">math.ceil</A><BR>
<A HREF="manual.html#pdf-math.cos">math.cos</A><BR>
<A HREF="manual.html#pdf-math.deg">math.deg</A><BR>
<A HREF="manual.html#pdf-math.exp">math.exp</A><BR>
<A HREF="manual.html#pdf-math.floor">math.floor</A><BR>
<A HREF="manual.html#pdf-math.fmod">math.fmod</A><BR>
<A HREF="manual.html#pdf-math.huge">math.huge</A><BR>
<A HREF="manual.html#pdf-math.log">math.log</A><BR>
<A HREF="manual.html#pdf-math.max">math.max</A><BR>
<A HREF="manual.html#pdf-math.maxinteger">math.maxinteger</A><BR>
<A HREF="manual.html#pdf-math.min">math.min</A><BR>
<A HREF="manual.html#pdf-math.mininteger">math.mininteger</A><BR>
<A HREF="manual.html#pdf-math.modf">math.modf</A><BR>
<A HREF="manual.html#pdf-math.pi">math.pi</A><BR>
<A HREF="manual.html#pdf-math.rad">math.rad</A><BR>
<A HREF="manual.html#pdf-math.random">math.random</A><BR>
<A HREF="manual.html#pdf-math.randomseed">math.randomseed</A><BR>
<A HREF="manual.html#pdf-math.sin">math.sin</A><BR>
<A HREF="manual.html#pdf-math.sqrt">math.sqrt</A><BR>
<A HREF="manual.html#pdf-math.tan">math.tan</A><BR>
<A HREF="manual.html#pdf-math.tointeger">math.tointeger</A><BR>
<A HREF="manual.html#pdf-math.type">math.type</A><BR>
<A HREF="manual.html#pdf-math.ult">math.ult</A><BR>
<P>
<A HREF="manual.html#6.9">os</A><BR>
<A HREF="manual.html#pdf-os.clock">os.clock</A><BR>
<A HREF="manual.html#pdf-os.date">os.date</A><BR>
<A HREF="manual.html#pdf-os.difftime">os.difftime</A><BR>
<A HREF="manual.html#pdf-os.execute">os.execute</A><BR>
<A HREF="manual.html#pdf-os.exit">os.exit</A><BR>
<A HREF="manual.html#pdf-os.getenv">os.getenv</A><BR>
<A HREF="manual.html#pdf-os.remove">os.remove</A><BR>
<A HREF="manual.html#pdf-os.rename">os.rename</A><BR>
<A HREF="manual.html#pdf-os.setlocale">os.setlocale</A><BR>
<A HREF="manual.html#pdf-os.time">os.time</A><BR>
<A HREF="manual.html#pdf-os.tmpname">os.tmpname</A><BR>
<P>
<A HREF="manual.html#6.3">package</A><BR>
<A HREF="manual.html#pdf-package.config">package.config</A><BR>
<A HREF="manual.html#pdf-package.cpath">package.cpath</A><BR>
<A HREF="manual.html#pdf-package.loaded">package.loaded</A><BR>
<A HREF="manual.html#pdf-package.loadlib">package.loadlib</A><BR>
<A HREF="manual.html#pdf-package.path">package.path</A><BR>
<A HREF="manual.html#pdf-package.preload">package.preload</A><BR>
<A HREF="manual.html#pdf-package.searchers">package.searchers</A><BR>
<A HREF="manual.html#pdf-package.searchpath">package.searchpath</A><BR>
<P>
<A HREF="manual.html#6.4">string</A><BR>
<A HREF="manual.html#pdf-string.byte">string.byte</A><BR>
<A HREF="manual.html#pdf-string.char">string.char</A><BR>
<A HREF="manual.html#pdf-string.dump">string.dump</A><BR>
<A HREF="manual.html#pdf-string.find">string.find</A><BR>
<A HREF="manual.html#pdf-string.format">string.format</A><BR>
<A HREF="manual.html#pdf-string.gmatch">string.gmatch</A><BR>
<A HREF="manual.html#pdf-string.gsub">string.gsub</A><BR>
<A HREF="manual.html#pdf-string.len">string.len</A><BR>
<A HREF="manual.html#pdf-string.lower">string.lower</A><BR>
<A HREF="manual.html#pdf-string.match">string.match</A><BR>
<A HREF="manual.html#pdf-string.pack">string.pack</A><BR>
<A HREF="manual.html#pdf-string.packsize">string.packsize</A><BR>
<A HREF="manual.html#pdf-string.rep">string.rep</A><BR>
<A HREF="manual.html#pdf-string.reverse">string.reverse</A><BR>
<A HREF="manual.html#pdf-string.sub">string.sub</A><BR>
<A HREF="manual.html#pdf-string.unpack">string.unpack</A><BR>
<A HREF="manual.html#pdf-string.upper">string.upper</A><BR>
<P>
<A HREF="manual.html#6.6">table</A><BR>
<A HREF="manual.html#pdf-table.concat">table.concat</A><BR>
<A HREF="manual.html#pdf-table.insert">table.insert</A><BR>
<A HREF="manual.html#pdf-table.move">table.move</A><BR>
<A HREF="manual.html#pdf-table.pack">table.pack</A><BR>
<A HREF="manual.html#pdf-table.remove">table.remove</A><BR>
<A HREF="manual.html#pdf-table.sort">table.sort</A><BR>
<A HREF="manual.html#pdf-table.unpack">table.unpack</A><BR>
<P>
<A HREF="manual.html#6.5">utf8</A><BR>
<A HREF="manual.html#pdf-utf8.char">utf8.char</A><BR>
<A HREF="manual.html#pdf-utf8.charpattern">utf8.charpattern</A><BR>
<A HREF="manual.html#pdf-utf8.codepoint">utf8.codepoint</A><BR>
<A HREF="manual.html#pdf-utf8.codes">utf8.codes</A><BR>
<A HREF="manual.html#pdf-utf8.len">utf8.len</A><BR>
<A HREF="manual.html#pdf-utf8.offset">utf8.offset</A><BR>
<H3><A NAME="metamethods">metamethods</A></H3>
<P>
<A HREF="manual.html#2.4">__add</A><BR>
<A HREF="manual.html#2.4">__band</A><BR>
<A HREF="manual.html#2.4">__bnot</A><BR>
<A HREF="manual.html#2.4">__bor</A><BR>
<A HREF="manual.html#2.4">__bxor</A><BR>
<A HREF="manual.html#2.4">__call</A><BR>
<A HREF="manual.html#3.3.8">__close</A><BR>
<A HREF="manual.html#2.4">__concat</A><BR>
<A HREF="manual.html#2.4">__div</A><BR>
<A HREF="manual.html#2.4">__eq</A><BR>
<A HREF="manual.html#2.5.3">__gc</A><BR>
<A HREF="manual.html#2.4">__idiv</A><BR>
<A HREF="manual.html#2.4">__index</A><BR>
<A HREF="manual.html#2.4">__le</A><BR>
<A HREF="manual.html#2.4">__len</A><BR>
<A HREF="manual.html#2.4">__lt</A><BR>
<A HREF="manual.html#pdf-getmetatable">__metatable</A><BR>
<A HREF="manual.html#2.4">__mod</A><BR>
<A HREF="manual.html#2.5.4">__mode</A><BR>
<A HREF="manual.html#2.4">__mul</A><BR>
<A HREF="manual.html#luaL_newmetatable">__name</A><BR>
<A HREF="manual.html#2.4">__newindex</A><BR>
<A HREF="manual.html#pdf-pairs">__pairs</A><BR>
<A HREF="manual.html#2.4">__pow</A><BR>
<A HREF="manual.html#2.4">__shl</A><BR>
<A HREF="manual.html#2.4">__shr</A><BR>
<A HREF="manual.html#2.4">__sub</A><BR>
<A HREF="manual.html#pdf-tostring">__tostring</A><BR>
<A HREF="manual.html#2.4">__unm</A><BR>
<H3><A NAME="env">environment<BR>variables</A></H3>
<P>
<A HREF="manual.html#pdf-LUA_CPATH">LUA_CPATH</A><BR>
<A HREF="manual.html#pdf-LUA_CPATH_5_4">LUA_CPATH_5_4</A><BR>
<A HREF="manual.html#pdf-LUA_INIT">LUA_INIT</A><BR>
<A HREF="manual.html#pdf-LUA_INIT_5_4">LUA_INIT_5_4</A><BR>
<A HREF="manual.html#pdf-LUA_PATH">LUA_PATH</A><BR>
<A HREF="manual.html#pdf-LUA_PATH_5_4">LUA_PATH_5_4</A><BR>
</TD>
<TD>
<H3><A NAME="api">C API</A></H3>
<P>
<A HREF="manual.html#lua_Alloc">lua_Alloc</A><BR>
<A HREF="manual.html#lua_CFunction">lua_CFunction</A><BR>
<A HREF="manual.html#lua_Debug">lua_Debug</A><BR>
<A HREF="manual.html#lua_Hook">lua_Hook</A><BR>
<A HREF="manual.html#lua_Integer">lua_Integer</A><BR>
<A HREF="manual.html#lua_KContext">lua_KContext</A><BR>
<A HREF="manual.html#lua_KFunction">lua_KFunction</A><BR>
<A HREF="manual.html#lua_Number">lua_Number</A><BR>
<A HREF="manual.html#lua_Reader">lua_Reader</A><BR>
<A HREF="manual.html#lua_State">lua_State</A><BR>
<A HREF="manual.html#lua_Unsigned">lua_Unsigned</A><BR>
<A HREF="manual.html#lua_WarnFunction">lua_WarnFunction</A><BR>
<A HREF="manual.html#lua_Writer">lua_Writer</A><BR>
<P>
<A HREF="manual.html#lua_absindex">lua_absindex</A><BR>
<A HREF="manual.html#lua_arith">lua_arith</A><BR>
<A HREF="manual.html#lua_atpanic">lua_atpanic</A><BR>
<A HREF="manual.html#lua_call">lua_call</A><BR>
<A HREF="manual.html#lua_callk">lua_callk</A><BR>
<A HREF="manual.html#lua_checkstack">lua_checkstack</A><BR>
<A HREF="manual.html#lua_close">lua_close</A><BR>
<A HREF="manual.html#lua_closeslot">lua_closeslot</A><BR>
<A HREF="manual.html#lua_compare">lua_compare</A><BR>
<A HREF="manual.html#lua_concat">lua_concat</A><BR>
<A HREF="manual.html#lua_copy">lua_copy</A><BR>
<A HREF="manual.html#lua_createtable">lua_createtable</A><BR>
<A HREF="manual.html#lua_dump">lua_dump</A><BR>
<A HREF="manual.html#lua_error">lua_error</A><BR>
<A HREF="manual.html#lua_gc">lua_gc</A><BR>
<A HREF="manual.html#lua_getallocf">lua_getallocf</A><BR>
<A HREF="manual.html#lua_getextraspace">lua_getextraspace</A><BR>
<A HREF="manual.html#lua_getfield">lua_getfield</A><BR>
<A HREF="manual.html#lua_getglobal">lua_getglobal</A><BR>
<A HREF="manual.html#lua_gethook">lua_gethook</A><BR>
<A HREF="manual.html#lua_gethookcount">lua_gethookcount</A><BR>
<A HREF="manual.html#lua_gethookmask">lua_gethookmask</A><BR>
<A HREF="manual.html#lua_geti">lua_geti</A><BR>
<A HREF="manual.html#lua_getinfo">lua_getinfo</A><BR>
<A HREF="manual.html#lua_getiuservalue">lua_getiuservalue</A><BR>
<A HREF="manual.html#lua_getlocal">lua_getlocal</A><BR>
<A HREF="manual.html#lua_getmetatable">lua_getmetatable</A><BR>
<A HREF="manual.html#lua_getstack">lua_getstack</A><BR>
<A HREF="manual.html#lua_gettable">lua_gettable</A><BR>
<A HREF="manual.html#lua_gettop">lua_gettop</A><BR>
<A HREF="manual.html#lua_getupvalue">lua_getupvalue</A><BR>
<A HREF="manual.html#lua_insert">lua_insert</A><BR>
<A HREF="manual.html#lua_isboolean">lua_isboolean</A><BR>
<A HREF="manual.html#lua_iscfunction">lua_iscfunction</A><BR>
<A HREF="manual.html#lua_isfunction">lua_isfunction</A><BR>
<A HREF="manual.html#lua_isinteger">lua_isinteger</A><BR>
<A HREF="manual.html#lua_islightuserdata">lua_islightuserdata</A><BR>
<A HREF="manual.html#lua_isnil">lua_isnil</A><BR>
<A HREF="manual.html#lua_isnone">lua_isnone</A><BR>
<A HREF="manual.html#lua_isnoneornil">lua_isnoneornil</A><BR>
<A HREF="manual.html#lua_isnumber">lua_isnumber</A><BR>
<A HREF="manual.html#lua_isstring">lua_isstring</A><BR>
<A HREF="manual.html#lua_istable">lua_istable</A><BR>
<A HREF="manual.html#lua_isthread">lua_isthread</A><BR>
<A HREF="manual.html#lua_isuserdata">lua_isuserdata</A><BR>
<A HREF="manual.html#lua_isyieldable">lua_isyieldable</A><BR>
<A HREF="manual.html#lua_len">lua_len</A><BR>
<A HREF="manual.html#lua_load">lua_load</A><BR>
<A HREF="manual.html#lua_newstate">lua_newstate</A><BR>
<A HREF="manual.html#lua_newtable">lua_newtable</A><BR>
<A HREF="manual.html#lua_newthread">lua_newthread</A><BR>
<A HREF="manual.html#lua_newuserdatauv">lua_newuserdatauv</A><BR>
<A HREF="manual.html#lua_next">lua_next</A><BR>
<A HREF="manual.html#lua_numbertointeger">lua_numbertointeger</A><BR>
<A HREF="manual.html#lua_pcall">lua_pcall</A><BR>
<A HREF="manual.html#lua_pcallk">lua_pcallk</A><BR>
<A HREF="manual.html#lua_pop">lua_pop</A><BR>
<A HREF="manual.html#lua_pushboolean">lua_pushboolean</A><BR>
<A HREF="manual.html#lua_pushcclosure">lua_pushcclosure</A><BR>
<A HREF="manual.html#lua_pushcfunction">lua_pushcfunction</A><BR>
<A HREF="manual.html#lua_pushfstring">lua_pushfstring</A><BR>
<A HREF="manual.html#lua_pushglobaltable">lua_pushglobaltable</A><BR>
<A HREF="manual.html#lua_pushinteger">lua_pushinteger</A><BR>
<A HREF="manual.html#lua_pushlightuserdata">lua_pushlightuserdata</A><BR>
<A HREF="manual.html#lua_pushliteral">lua_pushliteral</A><BR>
<A HREF="manual.html#lua_pushlstring">lua_pushlstring</A><BR>
<A HREF="manual.html#lua_pushnil">lua_pushnil</A><BR>
<A HREF="manual.html#lua_pushnumber">lua_pushnumber</A><BR>
<A HREF="manual.html#lua_pushstring">lua_pushstring</A><BR>
<A HREF="manual.html#lua_pushthread">lua_pushthread</A><BR>
<A HREF="manual.html#lua_pushvalue">lua_pushvalue</A><BR>
<A HREF="manual.html#lua_pushvfstring">lua_pushvfstring</A><BR>
<A HREF="manual.html#lua_rawequal">lua_rawequal</A><BR>
<A HREF="manual.html#lua_rawget">lua_rawget</A><BR>
<A HREF="manual.html#lua_rawgeti">lua_rawgeti</A><BR>
<A HREF="manual.html#lua_rawgetp">lua_rawgetp</A><BR>
<A HREF="manual.html#lua_rawlen">lua_rawlen</A><BR>
<A HREF="manual.html#lua_rawset">lua_rawset</A><BR>
<A HREF="manual.html#lua_rawseti">lua_rawseti</A><BR>
<A HREF="manual.html#lua_rawsetp">lua_rawsetp</A><BR>
<A HREF="manual.html#lua_register">lua_register</A><BR>
<A HREF="manual.html#lua_remove">lua_remove</A><BR>
<A HREF="manual.html#lua_replace">lua_replace</A><BR>
<A HREF="manual.html#lua_resetthread">lua_resetthread</A><BR>
<A HREF="manual.html#lua_resume">lua_resume</A><BR>
<A HREF="manual.html#lua_rotate">lua_rotate</A><BR>
<A HREF="manual.html#lua_setallocf">lua_setallocf</A><BR>
<A HREF="manual.html#lua_setfield">lua_setfield</A><BR>
<A HREF="manual.html#lua_setglobal">lua_setglobal</A><BR>
<A HREF="manual.html#lua_sethook">lua_sethook</A><BR>
<A HREF="manual.html#lua_seti">lua_seti</A><BR>
<A HREF="manual.html#lua_setiuservalue">lua_setiuservalue</A><BR>
<A HREF="manual.html#lua_setlocal">lua_setlocal</A><BR>
<A HREF="manual.html#lua_setmetatable">lua_setmetatable</A><BR>
<A HREF="manual.html#lua_settable">lua_settable</A><BR>
<A HREF="manual.html#lua_settop">lua_settop</A><BR>
<A HREF="manual.html#lua_setupvalue">lua_setupvalue</A><BR>
<A HREF="manual.html#lua_setwarnf">lua_setwarnf</A><BR>
<A HREF="manual.html#lua_status">lua_status</A><BR>
<A HREF="manual.html#lua_stringtonumber">lua_stringtonumber</A><BR>
<A HREF="manual.html#lua_toboolean">lua_toboolean</A><BR>
<A HREF="manual.html#lua_tocfunction">lua_tocfunction</A><BR>
<A HREF="manual.html#lua_toclose">lua_toclose</A><BR>
<A HREF="manual.html#lua_tointeger">lua_tointeger</A><BR>
<A HREF="manual.html#lua_tointegerx">lua_tointegerx</A><BR>
<A HREF="manual.html#lua_tolstring">lua_tolstring</A><BR>
<A HREF="manual.html#lua_tonumber">lua_tonumber</A><BR>
<A HREF="manual.html#lua_tonumberx">lua_tonumberx</A><BR>
<A HREF="manual.html#lua_topointer">lua_topointer</A><BR>
<A HREF="manual.html#lua_tostring">lua_tostring</A><BR>
<A HREF="manual.html#lua_tothread">lua_tothread</A><BR>
<A HREF="manual.html#lua_touserdata">lua_touserdata</A><BR>
<A HREF="manual.html#lua_type">lua_type</A><BR>
<A HREF="manual.html#lua_typename">lua_typename</A><BR>
<A HREF="manual.html#lua_upvalueid">lua_upvalueid</A><BR>
<A HREF="manual.html#lua_upvalueindex">lua_upvalueindex</A><BR>
<A HREF="manual.html#lua_upvaluejoin">lua_upvaluejoin</A><BR>
<A HREF="manual.html#lua_version">lua_version</A><BR>
<A HREF="manual.html#lua_warning">lua_warning</A><BR>
<A HREF="manual.html#lua_xmove">lua_xmove</A><BR>
<A HREF="manual.html#lua_yield">lua_yield</A><BR>
<A HREF="manual.html#lua_yieldk">lua_yieldk</A><BR>
</TD>
<TD>
<H3><A NAME="auxlib">auxiliary library</A></H3>
<P>
<A HREF="manual.html#luaL_Buffer">luaL_Buffer</A><BR>
<A HREF="manual.html#luaL_Reg">luaL_Reg</A><BR>
<A HREF="manual.html#luaL_Stream">luaL_Stream</A><BR>
<P>
<A HREF="manual.html#luaL_addchar">luaL_addchar</A><BR>
<A HREF="manual.html#luaL_addgsub">luaL_addgsub</A><BR>
<A HREF="manual.html#luaL_addlstring">luaL_addlstring</A><BR>
<A HREF="manual.html#luaL_addsize">luaL_addsize</A><BR>
<A HREF="manual.html#luaL_addstring">luaL_addstring</A><BR>
<A HREF="manual.html#luaL_addvalue">luaL_addvalue</A><BR>
<A HREF="manual.html#luaL_argcheck">luaL_argcheck</A><BR>
<A HREF="manual.html#luaL_argerror">luaL_argerror</A><BR>
<A HREF="manual.html#luaL_argexpected">luaL_argexpected</A><BR>
<A HREF="manual.html#luaL_buffaddr">luaL_buffaddr</A><BR>
<A HREF="manual.html#luaL_buffinit">luaL_buffinit</A><BR>
<A HREF="manual.html#luaL_buffinitsize">luaL_buffinitsize</A><BR>
<A HREF="manual.html#luaL_bufflen">luaL_bufflen</A><BR>
<A HREF="manual.html#luaL_buffsub">luaL_buffsub</A><BR>
<A HREF="manual.html#luaL_callmeta">luaL_callmeta</A><BR>
<A HREF="manual.html#luaL_checkany">luaL_checkany</A><BR>
<A HREF="manual.html#luaL_checkinteger">luaL_checkinteger</A><BR>
<A HREF="manual.html#luaL_checklstring">luaL_checklstring</A><BR>
<A HREF="manual.html#luaL_checknumber">luaL_checknumber</A><BR>
<A HREF="manual.html#luaL_checkoption">luaL_checkoption</A><BR>
<A HREF="manual.html#luaL_checkstack">luaL_checkstack</A><BR>
<A HREF="manual.html#luaL_checkstring">luaL_checkstring</A><BR>
<A HREF="manual.html#luaL_checktype">luaL_checktype</A><BR>
<A HREF="manual.html#luaL_checkudata">luaL_checkudata</A><BR>
<A HREF="manual.html#luaL_checkversion">luaL_checkversion</A><BR>
<A HREF="manual.html#luaL_dofile">luaL_dofile</A><BR>
<A HREF="manual.html#luaL_dostring">luaL_dostring</A><BR>
<A HREF="manual.html#luaL_error">luaL_error</A><BR>
<A HREF="manual.html#luaL_execresult">luaL_execresult</A><BR>
<A HREF="manual.html#luaL_fileresult">luaL_fileresult</A><BR>
<A HREF="manual.html#luaL_getmetafield">luaL_getmetafield</A><BR>
<A HREF="manual.html#luaL_getmetatable">luaL_getmetatable</A><BR>
<A HREF="manual.html#luaL_getsubtable">luaL_getsubtable</A><BR>
<A HREF="manual.html#luaL_gsub">luaL_gsub</A><BR>
<A HREF="manual.html#luaL_len">luaL_len</A><BR>
<A HREF="manual.html#luaL_loadbuffer">luaL_loadbuffer</A><BR>
<A HREF="manual.html#luaL_loadbufferx">luaL_loadbufferx</A><BR>
<A HREF="manual.html#luaL_loadfile">luaL_loadfile</A><BR>
<A HREF="manual.html#luaL_loadfilex">luaL_loadfilex</A><BR>
<A HREF="manual.html#luaL_loadstring">luaL_loadstring</A><BR>
<A HREF="manual.html#luaL_newlib">luaL_newlib</A><BR>
<A HREF="manual.html#luaL_newlibtable">luaL_newlibtable</A><BR>
<A HREF="manual.html#luaL_newmetatable">luaL_newmetatable</A><BR>
<A HREF="manual.html#luaL_newstate">luaL_newstate</A><BR>
<A HREF="manual.html#luaL_openlibs">luaL_openlibs</A><BR>
<A HREF="manual.html#luaL_opt">luaL_opt</A><BR>
<A HREF="manual.html#luaL_optinteger">luaL_optinteger</A><BR>
<A HREF="manual.html#luaL_optlstring">luaL_optlstring</A><BR>
<A HREF="manual.html#luaL_optnumber">luaL_optnumber</A><BR>
<A HREF="manual.html#luaL_optstring">luaL_optstring</A><BR>
<A HREF="manual.html#luaL_prepbuffer">luaL_prepbuffer</A><BR>
<A HREF="manual.html#luaL_prepbuffsize">luaL_prepbuffsize</A><BR>
<A HREF="manual.html#luaL_pushfail">luaL_pushfail</A><BR>
<A HREF="manual.html#luaL_pushresult">luaL_pushresult</A><BR>
<A HREF="manual.html#luaL_pushresultsize">luaL_pushresultsize</A><BR>
<A HREF="manual.html#luaL_ref">luaL_ref</A><BR>
<A HREF="manual.html#luaL_requiref">luaL_requiref</A><BR>
<A HREF="manual.html#luaL_setfuncs">luaL_setfuncs</A><BR>
<A HREF="manual.html#luaL_setmetatable">luaL_setmetatable</A><BR>
<A HREF="manual.html#luaL_testudata">luaL_testudata</A><BR>
<A HREF="manual.html#luaL_tolstring">luaL_tolstring</A><BR>
<A HREF="manual.html#luaL_traceback">luaL_traceback</A><BR>
<A HREF="manual.html#luaL_typeerror">luaL_typeerror</A><BR>
<A HREF="manual.html#luaL_typename">luaL_typename</A><BR>
<A HREF="manual.html#luaL_unref">luaL_unref</A><BR>
<A HREF="manual.html#luaL_where">luaL_where</A><BR>
<H3><A NAME="library">standard library</A></H3>
<P>
<A HREF="manual.html#pdf-luaopen_base">luaopen_base</A><BR>
<A HREF="manual.html#pdf-luaopen_coroutine">luaopen_coroutine</A><BR>
<A HREF="manual.html#pdf-luaopen_debug">luaopen_debug</A><BR>
<A HREF="manual.html#pdf-luaopen_io">luaopen_io</A><BR>
<A HREF="manual.html#pdf-luaopen_math">luaopen_math</A><BR>
<A HREF="manual.html#pdf-luaopen_os">luaopen_os</A><BR>
<A HREF="manual.html#pdf-luaopen_package">luaopen_package</A><BR>
<A HREF="manual.html#pdf-luaopen_string">luaopen_string</A><BR>
<A HREF="manual.html#pdf-luaopen_table">luaopen_table</A><BR>
<A HREF="manual.html#pdf-luaopen_utf8">luaopen_utf8</A><BR>
<H3><A NAME="constants">constants</A></H3>
<P>
<A HREF="manual.html#pdf-LUA_ERRERR">LUA_ERRERR</A><BR>
<A HREF="manual.html#pdf-LUA_ERRFILE">LUA_ERRFILE</A><BR>
<A HREF="manual.html#pdf-LUA_ERRMEM">LUA_ERRMEM</A><BR>
<A HREF="manual.html#pdf-LUA_ERRRUN">LUA_ERRRUN</A><BR>
<A HREF="manual.html#pdf-LUA_ERRSYNTAX">LUA_ERRSYNTAX</A><BR>
<A HREF="manual.html#pdf-LUA_HOOKCALL">LUA_HOOKCALL</A><BR>
<A HREF="manual.html#pdf-LUA_HOOKCOUNT">LUA_HOOKCOUNT</A><BR>
<A HREF="manual.html#pdf-LUA_HOOKLINE">LUA_HOOKLINE</A><BR>
<A HREF="manual.html#pdf-LUA_HOOKRET">LUA_HOOKRET</A><BR>
<A HREF="manual.html#pdf-LUA_HOOKTAILCALL">LUA_HOOKTAILCALL</A><BR>
<A HREF="manual.html#pdf-LUA_LOADED_TABLE">LUA_LOADED_TABLE</A><BR>
<A HREF="manual.html#pdf-LUA_MASKCALL">LUA_MASKCALL</A><BR>
<A HREF="manual.html#pdf-LUA_MASKCOUNT">LUA_MASKCOUNT</A><BR>
<A HREF="manual.html#pdf-LUA_MASKLINE">LUA_MASKLINE</A><BR>
<A HREF="manual.html#pdf-LUA_MASKRET">LUA_MASKRET</A><BR>
<A HREF="manual.html#pdf-LUA_MAXINTEGER">LUA_MAXINTEGER</A><BR>
<A HREF="manual.html#pdf-LUA_MININTEGER">LUA_MININTEGER</A><BR>
<A HREF="manual.html#pdf-LUA_MINSTACK">LUA_MINSTACK</A><BR>
<A HREF="manual.html#pdf-LUA_MULTRET">LUA_MULTRET</A><BR>
<A HREF="manual.html#pdf-LUA_NOREF">LUA_NOREF</A><BR>
<A HREF="manual.html#pdf-LUA_OK">LUA_OK</A><BR>
<A HREF="manual.html#pdf-LUA_OPADD">LUA_OPADD</A><BR>
<A HREF="manual.html#pdf-LUA_OPBAND">LUA_OPBAND</A><BR>
<A HREF="manual.html#pdf-LUA_OPBNOT">LUA_OPBNOT</A><BR>
<A HREF="manual.html#pdf-LUA_OPBOR">LUA_OPBOR</A><BR>
<A HREF="manual.html#pdf-LUA_OPBXOR">LUA_OPBXOR</A><BR>
<A HREF="manual.html#pdf-LUA_OPDIV">LUA_OPDIV</A><BR>
<A HREF="manual.html#pdf-LUA_OPEQ">LUA_OPEQ</A><BR>
<A HREF="manual.html#pdf-LUA_OPIDIV">LUA_OPIDIV</A><BR>
<A HREF="manual.html#pdf-LUA_OPLE">LUA_OPLE</A><BR>
<A HREF="manual.html#pdf-LUA_OPLT">LUA_OPLT</A><BR>
<A HREF="manual.html#pdf-LUA_OPMOD">LUA_OPMOD</A><BR>
<A HREF="manual.html#pdf-LUA_OPMUL">LUA_OPMUL</A><BR>
<A HREF="manual.html#pdf-LUA_OPPOW">LUA_OPPOW</A><BR>
<A HREF="manual.html#pdf-LUA_OPSHL">LUA_OPSHL</A><BR>
<A HREF="manual.html#pdf-LUA_OPSHR">LUA_OPSHR</A><BR>
<A HREF="manual.html#pdf-LUA_OPSUB">LUA_OPSUB</A><BR>
<A HREF="manual.html#pdf-LUA_OPUNM">LUA_OPUNM</A><BR>
<A HREF="manual.html#pdf-LUA_PRELOAD_TABLE">LUA_PRELOAD_TABLE</A><BR>
<A HREF="manual.html#pdf-LUA_REFNIL">LUA_REFNIL</A><BR>
<A HREF="manual.html#pdf-LUA_REGISTRYINDEX">LUA_REGISTRYINDEX</A><BR>
<A HREF="manual.html#pdf-LUA_RIDX_GLOBALS">LUA_RIDX_GLOBALS</A><BR>
<A HREF="manual.html#pdf-LUA_RIDX_MAINTHREAD">LUA_RIDX_MAINTHREAD</A><BR>
<A HREF="manual.html#pdf-LUA_TBOOLEAN">LUA_TBOOLEAN</A><BR>
<A HREF="manual.html#pdf-LUA_TFUNCTION">LUA_TFUNCTION</A><BR>
<A HREF="manual.html#pdf-LUA_TLIGHTUSERDATA">LUA_TLIGHTUSERDATA</A><BR>
<A HREF="manual.html#pdf-LUA_TNIL">LUA_TNIL</A><BR>
<A HREF="manual.html#pdf-LUA_TNONE">LUA_TNONE</A><BR>
<A HREF="manual.html#pdf-LUA_TNUMBER">LUA_TNUMBER</A><BR>
<A HREF="manual.html#pdf-LUA_TSTRING">LUA_TSTRING</A><BR>
<A HREF="manual.html#pdf-LUA_TTABLE">LUA_TTABLE</A><BR>
<A HREF="manual.html#pdf-LUA_TTHREAD">LUA_TTHREAD</A><BR>
<A HREF="manual.html#pdf-LUA_TUSERDATA">LUA_TUSERDATA</A><BR>
<A HREF="manual.html#pdf-LUA_USE_APICHECK">LUA_USE_APICHECK</A><BR>
<A HREF="manual.html#pdf-LUA_YIELD">LUA_YIELD</A><BR>
<A HREF="manual.html#pdf-LUAL_BUFFERSIZE">LUAL_BUFFERSIZE</A><BR>
</TD>
</TR>
</TABLE>
<P CLASS="footer">
Last update:
Thu May 9 14:47:09 UTC 2024
</P>
<!--
Last change: revised for Lua 5.4.7
-->
</BODY>
</HTML>

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.\" $Id: lua.man,v 1.14 2024/05/08 18:48:27 lhf Exp $
.TH LUA 1 "$Date: 2024/05/08 18:48:27 $"
.SH NAME
lua \- Lua interpreter
.SH SYNOPSIS
.B lua
[
.I options
]
[
.I script
[
.I args
]
]
.SH DESCRIPTION
.B lua
is the standalone Lua interpreter.
It loads and executes Lua programs,
either in textual source form or
in precompiled binary form.
(Precompiled binaries are output by
.BR luac ,
the Lua compiler.)
.B lua
can be used as a batch interpreter and also interactively.
.LP
After handling the
.IR options ,
the Lua program in file
.I script
is loaded and executed.
The
.I args
are available to
.I script
as strings in a global table named
.B arg
and also as arguments to its main function.
When called without arguments,
.B lua
behaves as
.B "lua \-v \-i"
if the standard input is a terminal,
and as
.B "lua \-"
otherwise.
.LP
In interactive mode,
.B lua
prompts the user,
reads lines from the standard input,
and executes them as they are read.
If the line contains an expression,
then the line is evaluated and the result is printed.
If a line does not contain a complete statement,
then a secondary prompt is displayed and
lines are read until a complete statement is formed or
a syntax error is found.
.LP
Before handling command line options and scripts,
.B lua
checks the contents of the environment variables
.B LUA_INIT_5_4
and
.BR LUA_INIT ,
in that order.
If the contents are of the form
.RI '@ filename ',
then
.I filename
is executed.
Otherwise, the contents are assumed to be a Lua statement and is executed.
When
.B LUA_INIT_5_4
is defined,
.B LUA_INIT
is ignored.
.SH OPTIONS
.TP
.BI \-e " stat"
execute statement
.IR stat .
.TP
.B \-i
enter interactive mode after executing
.IR script .
.TP
.BI \-l " mod"
require library
.I mod
into global
.IR mod .
.TP
.BI \-l " g=mod"
require library
.I mod
into global
.IR g .
.TP
.B \-v
show version information.
.TP
.B \-E
ignore environment variables.
.TP
.B \-W
turn warnings on.
.TP
.B \-\-
stop handling options.
.TP
.B \-
stop handling options and execute the standard input as a file.
.SH ENVIRONMENT VARIABLES
The following environment variables affect the execution of
.BR lua .
When defined,
the version-specific variants take priority
and the version-neutral variants are ignored.
.TP
.B LUA_INIT, LUA_INIT_5_4
Code to be executed before command line options and scripts.
.TP
.B LUA_PATH, LUA_PATH_5_4
Initial value of package.path,
the path used by require to search for Lua loaders.
.TP
.B LUA_CPATH, LUA_CPATH_5_4
Initial value of package.cpath,
the path used by require to search for C loaders.
.SH EXIT STATUS
If a script calls os.exit,
then
.B lua
exits with the given exit status.
Otherwise,
.B lua
exits
with EXIT_SUCCESS (0 on POSIX systems) if there were no errors
and
with EXIT_FAILURE (1 on POSIX systems) if there were errors.
Errors raised in interactive mode do not cause exits.
.SH DIAGNOSTICS
Error messages should be self explanatory.
.SH "SEE ALSO"
.BR luac (1)
.br
The documentation at lua.org,
especially section 7 of the reference manual.
.SH AUTHORS
R. Ierusalimschy,
L. H. de Figueiredo,
W. Celes
.\" EOF

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margin: 16px auto ;
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border: solid #ccc 1px ;
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max-width: 70em ;
width: 90% ;
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h1 {
font-size: 28pt ;
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h1 img {
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h2:before {
content: "\2756" ;
padding-right: 0.5em ;
}
a {
text-decoration: none ;
}
a:link {
color: #000080 ;
}
a:link:hover, a:visited:hover {
background-color: #D0D0FF ;
color: #000080 ;
border-radius: 4px ;
}
a:link:active, a:visited:active {
color: #FF0000 ;
}
div.menubar {
padding-bottom: 0.5em ;
}
p.menubar {
margin-left: 2.5em ;
}
.menubar a:hover {
margin: -3px -3px -3px -3px ;
padding: 3px 3px 3px 3px ;
border-radius: 4px ;
}
:target {
background-color: #F0F0F0 ;
margin: -8px ;
padding: 8px ;
border-radius: 8px ;
outline: none ;
}
hr {
display: none ;
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table hr {
background-color: #a0a0a0 ;
color: #a0a0a0 ;
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color: gray ;
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td.gutter {
width: 4% ;
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vertical-align: top ;
padding-bottom: 1em ;
text-align: justify ;
line-height: 1.25 ;
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table.book td {
vertical-align: top ;
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padding-right: 1em ;
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table.book img {
border: solid #000080 1px ;
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}
table.book span {
font-size: small ;
text-align: left ;
display: block ;
margin-top: 0.25em ;
}
p.logos a:link:hover, p.logos a:visited:hover {
background-color: inherit ;
}
img {
background-color: white ;
}

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.\" $Id: luac.man,v 1.29 2011/11/16 13:53:40 lhf Exp $
.TH LUAC 1 "$Date: 2011/11/16 13:53:40 $"
.SH NAME
luac \- Lua compiler
.SH SYNOPSIS
.B luac
[
.I options
] [
.I filenames
]
.SH DESCRIPTION
.B luac
is the Lua compiler.
It translates programs written in the Lua programming language
into binary files containing precompiled chunks
that can be later loaded and executed.
.LP
The main advantages of precompiling chunks are:
faster loading,
protecting source code from accidental user changes,
and
off-line syntax checking.
Precompiling does not imply faster execution
because in Lua chunks are always compiled into bytecodes before being executed.
.B luac
simply allows those bytecodes to be saved in a file for later execution.
Precompiled chunks are not necessarily smaller than the corresponding source.
The main goal in precompiling is faster loading.
.LP
In the command line,
you can mix
text files containing Lua source and
binary files containing precompiled chunks.
.B luac
produces a single output file containing the combined bytecodes
for all files given.
Executing the combined file is equivalent to executing the given files.
By default,
the output file is named
.BR luac.out ,
but you can change this with the
.B \-o
option.
.LP
Precompiled chunks are
.I not
portable across different architectures.
Moreover,
the internal format of precompiled chunks
is likely to change when a new version of Lua is released.
Make sure you save the source files of all Lua programs that you precompile.
.LP
.SH OPTIONS
.TP
.B \-l
produce a listing of the compiled bytecode for Lua's virtual machine.
Listing bytecodes is useful to learn about Lua's virtual machine.
If no files are given, then
.B luac
loads
.B luac.out
and lists its contents.
Use
.B \-l \-l
for a full listing.
.TP
.BI \-o " file"
output to
.IR file ,
instead of the default
.BR luac.out .
(You can use
.B "'\-'"
for standard output,
but not on platforms that open standard output in text mode.)
The output file may be one of the given files because
all files are loaded before the output file is written.
Be careful not to overwrite precious files.
.TP
.B \-p
load files but do not generate any output file.
Used mainly for syntax checking and for testing precompiled chunks:
corrupted files will probably generate errors when loaded.
If no files are given, then
.B luac
loads
.B luac.out
and tests its contents.
No messages are displayed if the file loads without errors.
.TP
.B \-s
strip debug information before writing the output file.
This saves some space in very large chunks,
but if errors occur when running a stripped chunk,
then the error messages may not contain the full information they usually do.
In particular,
line numbers and names of local variables are lost.
.TP
.B \-v
show version information.
.TP
.B \-\-
stop handling options.
.TP
.B \-
stop handling options and process standard input.
.SH "SEE ALSO"
.BR lua (1)
.br
The documentation at lua.org.
.SH DIAGNOSTICS
Error messages should be self explanatory.
.SH AUTHORS
R. Ierusalimschy,
L. H. de Figueiredo,
W. Celes
.\" EOF

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font-size: 12pt ;
}
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float: right ;
font-family: inherit ;
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Lua 5.4 readme</TITLE>
<LINK REL="stylesheet" TYPE="text/css" HREF="lua.css">
<META HTTP-EQUIV="content-type" CONTENT="text/html; charset=iso-8859-1">
<STYLE TYPE="text/css">
blockquote, .display {
border: solid #a0a0a0 2px ;
border-radius: 8px ;
padding: 1em ;
margin: 0px ;
}
.display {
word-spacing: 0.25em ;
}
dl.display dd {
padding-bottom: 0.2em ;
}
tt, kbd, code {
font-size: 12pt ;
}
</STYLE>
</HEAD>
<BODY>
<H1>
<A HREF="https://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua"></A>
Welcome to Lua 5.4
</H1>
<DIV CLASS="menubar">
<A HREF="#about">about</A>
&middot;
<A HREF="#install">installation</A>
&middot;
<A HREF="#changes">changes</A>
&middot;
<A HREF="#license">license</A>
&middot;
<A HREF="contents.html">reference manual</A>
</DIV>
<H2><A NAME="about">About Lua</A></H2>
<P>
Lua is a powerful, efficient, lightweight, embeddable scripting language
developed by a
<A HREF="https://www.lua.org/authors.html">team</A>
at
<A HREF="https://www.puc-rio.br/">PUC-Rio</A>,
the Pontifical Catholic University of Rio de Janeiro in Brazil.
Lua is
<A HREF="#license">free software</A>
used in
<A HREF="https://www.lua.org/uses.html">many products and projects</A>
around the world.
<P>
Lua's
<A HREF="https://www.lua.org/">official website</A>
provides complete information
about Lua,
including
an
<A HREF="https://www.lua.org/about.html">executive summary</A>,
tips on
<A HREF="https://www.lua.org/start.html">getting started</A>,
and
updated
<A HREF="https://www.lua.org/docs.html">documentation</A>,
especially the
<A HREF="https://www.lua.org/manual/5.4/">reference manual</A>,
which may differ slightly from the
<A HREF="contents.html">local copy</A>
distributed in this package.
<H2><A NAME="install">Installing Lua</A></H2>
<P>
Lua is distributed in
<A HREF="https://www.lua.org/ftp/">source</A>
form.
You need to build it before using it.
Building Lua should be straightforward
because
Lua is implemented in pure ANSI C and compiles unmodified in all known
platforms that have an ANSI C compiler.
Lua also compiles unmodified as C++.
The instructions given below for building Lua are for Unix-like platforms,
such as Linux and macOS.
See also
<A HREF="#other">instructions for other systems</A>
and
<A HREF="#customization">customization options</A>.
<P>
If you don't have the time or the inclination to compile Lua yourself,
get a binary from
<A HREF="https://luabinaries.sourceforge.net">LuaBinaries</A>.
<H3>Building Lua</H3>
<P>
In most common Unix-like platforms, simply do "<KBD>make</KBD>".
Here are the details.
<OL>
<LI>
Open a terminal window and move to
the top-level directory, which is named <TT>lua-5.4.7</TT>.
The <TT>Makefile</TT> there controls both the build process and the installation process.
<P>
<LI>
Do "<KBD>make</KBD>". The <TT>Makefile</TT> will guess your platform and build Lua for it.
<P>
<LI>
If the guess failed, do "<KBD>make help</KBD>" and see if your platform is listed.
The platforms currently supported are:
<P>
<P CLASS="display">
guess aix bsd c89 freebsd generic ios linux linux-readline macosx mingw posix solaris
</P>
<P>
If your platform is listed, just do "<KBD>make xxx</KBD>", where xxx
is your platform name.
<P>
If your platform is not listed, try the closest one or posix, generic,
c89, in this order.
<P>
<LI>
The compilation takes only a few moments
and produces three files in the <TT>src</TT> directory:
lua (the interpreter),
luac (the compiler),
and liblua.a (the library).
<P>
<LI>
To check that Lua has been built correctly, do "<KBD>make test</KBD>"
after building Lua. This will run the interpreter and print its version.
</OL>
<P>
If you're running Linux, try "<KBD>make linux-readline</KBD>" to build the interactive Lua interpreter with handy line-editing and history capabilities.
If you get compilation errors,
make sure you have installed the <TT>readline</TT> development package
(which is probably named <TT>libreadline-dev</TT> or <TT>readline-devel</TT>).
If you get link errors after that,
then try "<KBD>make linux-readline MYLIBS=-ltermcap</KBD>".
<H3>Installing Lua</H3>
<P>
Once you have built Lua, you may want to install it in an official
place in your system. In this case, do "<KBD>make install</KBD>". The official
place and the way to install files are defined in the <TT>Makefile</TT>. You'll
probably need the right permissions to install files, and so may need to do "<KBD>sudo make install</KBD>".
<P>
To build and install Lua in one step, do "<KBD>make all install</KBD>",
or "<KBD>make xxx install</KBD>",
where xxx is your platform name.
<P>
To install Lua locally after building it, do "<KBD>make local</KBD>".
This will create a directory <TT>install</TT> with subdirectories
<TT>bin</TT>, <TT>include</TT>, <TT>lib</TT>, <TT>man</TT>, <TT>share</TT>,
and install Lua as listed below.
To install Lua locally, but in some other directory, do
"<KBD>make install INSTALL_TOP=xxx</KBD>", where xxx is your chosen directory.
The installation starts in the <TT>src</TT> and <TT>doc</TT> directories,
so take care if <TT>INSTALL_TOP</TT> is not an absolute path.
<DL CLASS="display">
<DT>
bin:
<DD>
lua luac
<DT>
include:
<DD>
lua.h luaconf.h lualib.h lauxlib.h lua.hpp
<DT>
lib:
<DD>
liblua.a
<DT>
man/man1:
<DD>
lua.1 luac.1
</DL>
<P>
These are the only directories you need for development.
If you only want to run Lua programs,
you only need the files in <TT>bin</TT> and <TT>man</TT>.
The files in <TT>include</TT> and <TT>lib</TT> are needed for
embedding Lua in C or C++ programs.
<H3><A NAME="customization">Customization</A></H3>
<P>
Three kinds of things can be customized by editing a file:
<UL>
<LI> Where and how to install Lua &mdash; edit <TT>Makefile</TT>.
<LI> How to build Lua &mdash; edit <TT>src/Makefile</TT>.
<LI> Lua features &mdash; edit <TT>src/luaconf.h</TT>.
</UL>
<P>
You don't actually need to edit the Makefiles because you may set the
relevant variables in the command line when invoking make.
Nevertheless, it's probably best to edit and save the Makefiles to
record the changes you've made.
<P>
On the other hand, if you need to customize some Lua features,
edit <TT>src/luaconf.h</TT> before building and installing Lua.
The edited file will be the one installed, and
it will be used by any Lua clients that you build, to ensure consistency.
Further customization is available to experts by editing the Lua sources.
<H3><A NAME="other">Building Lua on other systems</A></H3>
<P>
If you're not using the usual Unix tools, then the instructions for
building Lua depend on the compiler you use. You'll need to create
projects (or whatever your compiler uses) for building the library,
the interpreter, and the compiler, as follows:
<DL CLASS="display">
<DT>
library:
<DD>
lapi.c lcode.c lctype.c ldebug.c ldo.c ldump.c lfunc.c lgc.c llex.c lmem.c lobject.c lopcodes.c lparser.c lstate.c lstring.c ltable.c ltm.c lundump.c lvm.c lzio.c
lauxlib.c lbaselib.c lcorolib.c ldblib.c liolib.c lmathlib.c loadlib.c loslib.c lstrlib.c ltablib.c lutf8lib.c linit.c
<DT>
interpreter:
<DD>
library, lua.c
<DT>
compiler:
<DD>
library, luac.c
</DL>
<P>
To use Lua as a library in your own programs, you need to know how to
create and use libraries with your compiler. Moreover, to dynamically load
C libraries for Lua, you'll need to know how to create dynamic libraries
and you'll need to make sure that the Lua API functions are accessible to
those dynamic libraries &mdash; but <EM>don't</EM> link the Lua library
into each dynamic library. For Unix, we recommend that the Lua library
be linked statically into the host program and its symbols exported for
dynamic linking; <TT>src/Makefile</TT> does this for the Lua interpreter.
For Windows, we recommend that the Lua library be a DLL.
In all cases, the compiler luac should be linked statically.
<P>
As mentioned above, you may edit <TT>src/luaconf.h</TT> to customize
some features before building Lua.
<H2><A NAME="changes">Changes since Lua 5.3</A></H2>
<P>
Here are the main changes introduced in Lua 5.4.
The
<A HREF="contents.html">reference manual</A>
lists the
<A HREF="manual.html#8">incompatibilities</A> that had to be introduced.
<H3>Main changes</H3>
<UL>
<LI> new generational mode for garbage collection
<LI> to-be-closed variables
<LI> const variables
<LI> userdata can have multiple user values
<LI> new implementation for math.random
<LI> warning system
<LI> debug information about function arguments and returns
<LI> new semantics for the integer 'for' loop
<LI> optional 'init' argument to 'string.gmatch'
<LI> new functions 'lua_resetthread' and 'coroutine.close'
<LI> string-to-number coercions moved to the string library
<LI> allocation function allowed to fail when shrinking a memory block
<LI> new format '%p' in 'string.format'
<LI> utf8 library accepts codepoints up to 2^31
</UL>
<H2><A NAME="license">License</A></H2>
<P>
<A HREF="https://opensource.org/osd">
<IMG SRC="OSIApproved_100X125.png" ALIGN="right" ALT="[Open Source Initiative Approved License]" STYLE="padding-left: 1em" WIDTH=50>
</A>
Lua is free software distributed under the terms of the
<A HREF="https://opensource.org/license/mit">MIT license</A>
reproduced below;
it may be used for any purpose, including commercial purposes,
at absolutely no cost without having to ask us.
The only requirement is that if you do use Lua,
then you should give us credit by including the appropriate copyright notice somewhere in your product or its documentation.
For details, see the
<A HREF="https://www.lua.org/license.html">license page</A>.
<BLOCKQUOTE STYLE="padding-bottom: 0em">
Copyright &copy; 1994&ndash;2024 Lua.org, PUC-Rio.
<P>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
<P>
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
<P>
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
</BLOCKQUOTE>
<P>
<P CLASS="footer">
Last update:
Wed May 8 21:56:16 UTC 2024
</P>
<!--
Last change: revised for Lua 5.4.7
-->
</BODY>
</HTML>

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# Makefile for building Lua
# See ../doc/readme.html for installation and customization instructions.
# == CHANGE THE SETTINGS BELOW TO SUIT YOUR ENVIRONMENT =======================
# Your platform. See PLATS for possible values.
PLAT= guess
CC= gcc -std=gnu99
CFLAGS= -O2 -Wall -Wextra -DLUA_COMPAT_5_3 $(SYSCFLAGS) $(MYCFLAGS)
LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
LIBS= -lm $(SYSLIBS) $(MYLIBS)
AR= ar rcu
RANLIB= ranlib
RM= rm -f
UNAME= uname
SYSCFLAGS=
SYSLDFLAGS=
SYSLIBS=
MYCFLAGS=
MYLDFLAGS=
MYLIBS=
MYOBJS=
# Special flags for compiler modules; -Os reduces code size.
CMCFLAGS=
# == END OF USER SETTINGS -- NO NEED TO CHANGE ANYTHING BELOW THIS LINE =======
PLATS= guess aix bsd c89 freebsd generic ios linux linux-readline macosx mingw posix solaris
LUA_A= liblua.a
CORE_O= lapi.o lcode.o lctype.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o lundump.o lvm.o lzio.o
LIB_O= lauxlib.o lbaselib.o lcorolib.o ldblib.o liolib.o lmathlib.o loadlib.o loslib.o lstrlib.o ltablib.o lutf8lib.o linit.o
BASE_O= $(CORE_O) $(LIB_O) $(MYOBJS)
LUA_T= lua
LUA_O= lua.o
LUAC_T= luac
LUAC_O= luac.o
ALL_O= $(BASE_O) $(LUA_O) $(LUAC_O)
ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T)
ALL_A= $(LUA_A)
# Targets start here.
default: $(PLAT)
all: $(ALL_T)
o: $(ALL_O)
a: $(ALL_A)
$(LUA_A): $(BASE_O)
$(AR) $@ $(BASE_O)
$(RANLIB) $@
$(LUA_T): $(LUA_O) $(LUA_A)
$(CC) -o $@ $(LDFLAGS) $(LUA_O) $(LUA_A) $(LIBS)
$(LUAC_T): $(LUAC_O) $(LUA_A)
$(CC) -o $@ $(LDFLAGS) $(LUAC_O) $(LUA_A) $(LIBS)
test:
./$(LUA_T) -v
clean:
$(RM) $(ALL_T) $(ALL_O)
depend:
@$(CC) $(CFLAGS) -MM l*.c
echo:
@echo "PLAT= $(PLAT)"
@echo "CC= $(CC)"
@echo "CFLAGS= $(CFLAGS)"
@echo "LDFLAGS= $(LDFLAGS)"
@echo "LIBS= $(LIBS)"
@echo "AR= $(AR)"
@echo "RANLIB= $(RANLIB)"
@echo "RM= $(RM)"
@echo "UNAME= $(UNAME)"
# Convenience targets for popular platforms.
ALL= all
help:
@echo "Do 'make PLATFORM' where PLATFORM is one of these:"
@echo " $(PLATS)"
@echo "See doc/readme.html for complete instructions."
guess:
@echo Guessing `$(UNAME)`
@$(MAKE) `$(UNAME)`
AIX aix:
$(MAKE) $(ALL) CC="xlc" CFLAGS="-O2 -DLUA_USE_POSIX -DLUA_USE_DLOPEN" SYSLIBS="-ldl" SYSLDFLAGS="-brtl -bexpall"
bsd:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX -DLUA_USE_DLOPEN" SYSLIBS="-Wl,-E"
c89:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_C89" CC="gcc -std=c89"
@echo ''
@echo '*** C89 does not guarantee 64-bit integers for Lua.'
@echo '*** Make sure to compile all external Lua libraries'
@echo '*** with LUA_USE_C89 to ensure consistency'
@echo ''
FreeBSD NetBSD OpenBSD freebsd:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX -DLUA_USE_READLINE -I/usr/include/edit" SYSLIBS="-Wl,-E -ledit" CC="cc"
generic: $(ALL)
ios:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_IOS"
Linux linux: linux-noreadline
linux-noreadline:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX" SYSLIBS="-Wl,-E -ldl"
linux-readline:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_LINUX -DLUA_USE_READLINE" SYSLIBS="-Wl,-E -ldl -lreadline"
Darwin macos macosx:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_MACOSX -DLUA_USE_READLINE" SYSLIBS="-lreadline"
mingw:
$(MAKE) "LUA_A=lua54.dll" "LUA_T=lua.exe" \
"AR=$(CC) -shared -o" "RANLIB=strip --strip-unneeded" \
"SYSCFLAGS=-DLUA_BUILD_AS_DLL" "SYSLIBS=" "SYSLDFLAGS=-s" lua.exe
$(MAKE) "LUAC_T=luac.exe" luac.exe
posix:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX"
SunOS solaris:
$(MAKE) $(ALL) SYSCFLAGS="-DLUA_USE_POSIX -DLUA_USE_DLOPEN -D_REENTRANT" SYSLIBS="-ldl"
# Targets that do not create files (not all makes understand .PHONY).
.PHONY: all $(PLATS) help test clean default o a depend echo
# Compiler modules may use special flags.
llex.o:
$(CC) $(CFLAGS) $(CMCFLAGS) -c llex.c
lparser.o:
$(CC) $(CFLAGS) $(CMCFLAGS) -c lparser.c
lcode.o:
$(CC) $(CFLAGS) $(CMCFLAGS) -c lcode.c
# DO NOT DELETE
lapi.o: lapi.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lstring.h \
ltable.h lundump.h lvm.h
lauxlib.o: lauxlib.c lprefix.h lua.h luaconf.h lauxlib.h
lbaselib.o: lbaselib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lcode.o: lcode.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \
ldo.h lgc.h lstring.h ltable.h lvm.h
lcorolib.o: lcorolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lctype.o: lctype.c lprefix.h lctype.h lua.h luaconf.h llimits.h
ldblib.o: ldblib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
ldebug.o: ldebug.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
lobject.h ltm.h lzio.h lmem.h lcode.h llex.h lopcodes.h lparser.h \
ldebug.h ldo.h lfunc.h lstring.h lgc.h ltable.h lvm.h
ldo.o: ldo.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h lopcodes.h \
lparser.h lstring.h ltable.h lundump.h lvm.h
ldump.o: ldump.c lprefix.h lua.h luaconf.h lobject.h llimits.h lstate.h \
ltm.h lzio.h lmem.h lundump.h
lfunc.o: lfunc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h
lgc.o: lgc.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lstring.h ltable.h
linit.o: linit.c lprefix.h lua.h luaconf.h lualib.h lauxlib.h
liolib.o: liolib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
llex.o: llex.c lprefix.h lua.h luaconf.h lctype.h llimits.h ldebug.h \
lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lgc.h llex.h lparser.h \
lstring.h ltable.h
lmathlib.o: lmathlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lmem.o: lmem.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h
loadlib.o: loadlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lobject.o: lobject.c lprefix.h lua.h luaconf.h lctype.h llimits.h \
ldebug.h lstate.h lobject.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h \
lvm.h
lopcodes.o: lopcodes.c lprefix.h lopcodes.h llimits.h lua.h luaconf.h
loslib.o: loslib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lparser.o: lparser.c lprefix.h lua.h luaconf.h lcode.h llex.h lobject.h \
llimits.h lzio.h lmem.h lopcodes.h lparser.h ldebug.h lstate.h ltm.h \
ldo.h lfunc.h lstring.h lgc.h ltable.h
lstate.o: lstate.c lprefix.h lua.h luaconf.h lapi.h llimits.h lstate.h \
lobject.h ltm.h lzio.h lmem.h ldebug.h ldo.h lfunc.h lgc.h llex.h \
lstring.h ltable.h
lstring.o: lstring.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lstring.h lgc.h
lstrlib.o: lstrlib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
ltable.o: ltable.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h
ltablib.o: ltablib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
ltm.o: ltm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lgc.h lstring.h ltable.h lvm.h
lua.o: lua.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
luac.o: luac.c lprefix.h lua.h luaconf.h lauxlib.h ldebug.h lstate.h \
lobject.h llimits.h ltm.h lzio.h lmem.h lopcodes.h lopnames.h lundump.h
lundump.o: lundump.c lprefix.h lua.h luaconf.h ldebug.h lstate.h \
lobject.h llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lstring.h lgc.h \
lundump.h
lutf8lib.o: lutf8lib.c lprefix.h lua.h luaconf.h lauxlib.h lualib.h
lvm.o: lvm.c lprefix.h lua.h luaconf.h ldebug.h lstate.h lobject.h \
llimits.h ltm.h lzio.h lmem.h ldo.h lfunc.h lgc.h lopcodes.h lstring.h \
ltable.h lvm.h ljumptab.h
lzio.o: lzio.c lprefix.h lua.h luaconf.h llimits.h lmem.h lstate.h \
lobject.h ltm.h lzio.h
# (end of Makefile)

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/*
** $Id: lapi.h $
** Auxiliary functions from Lua API
** See Copyright Notice in lua.h
*/
#ifndef lapi_h
#define lapi_h
#include "llimits.h"
#include "lstate.h"
/* Increments 'L->top.p', checking for stack overflows */
#define api_incr_top(L) {L->top.p++; \
api_check(L, L->top.p <= L->ci->top.p, \
"stack overflow");}
/*
** If a call returns too many multiple returns, the callee may not have
** stack space to accommodate all results. In this case, this macro
** increases its stack space ('L->ci->top.p').
*/
#define adjustresults(L,nres) \
{ if ((nres) <= LUA_MULTRET && L->ci->top.p < L->top.p) \
L->ci->top.p = L->top.p; }
/* Ensure the stack has at least 'n' elements */
#define api_checknelems(L,n) \
api_check(L, (n) < (L->top.p - L->ci->func.p), \
"not enough elements in the stack")
/*
** To reduce the overhead of returning from C functions, the presence of
** to-be-closed variables in these functions is coded in the CallInfo's
** field 'nresults', in a way that functions with no to-be-closed variables
** with zero, one, or "all" wanted results have no overhead. Functions
** with other number of wanted results, as well as functions with
** variables to be closed, have an extra check.
*/
#define hastocloseCfunc(n) ((n) < LUA_MULTRET)
/* Map [-1, inf) (range of 'nresults') into (-inf, -2] */
#define codeNresults(n) (-(n) - 3)
#define decodeNresults(n) (-(n) - 3)
#endif

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/*
** $Id: lauxlib.h $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#ifndef lauxlib_h
#define lauxlib_h
#include <stddef.h>
#include <stdio.h>
#include "luaconf.h"
#include "lua.h"
/* global table */
#define LUA_GNAME "_G"
typedef struct luaL_Buffer luaL_Buffer;
/* extra error code for 'luaL_loadfilex' */
#define LUA_ERRFILE (LUA_ERRERR+1)
/* key, in the registry, for table of loaded modules */
#define LUA_LOADED_TABLE "_LOADED"
/* key, in the registry, for table of preloaded loaders */
#define LUA_PRELOAD_TABLE "_PRELOAD"
typedef struct luaL_Reg {
const char *name;
lua_CFunction func;
} luaL_Reg;
#define LUAL_NUMSIZES (sizeof(lua_Integer)*16 + sizeof(lua_Number))
LUALIB_API void (luaL_checkversion_) (lua_State *L, lua_Number ver, size_t sz);
#define luaL_checkversion(L) \
luaL_checkversion_(L, LUA_VERSION_NUM, LUAL_NUMSIZES)
LUALIB_API int (luaL_getmetafield) (lua_State *L, int obj, const char *e);
LUALIB_API int (luaL_callmeta) (lua_State *L, int obj, const char *e);
LUALIB_API const char *(luaL_tolstring) (lua_State *L, int idx, size_t *len);
LUALIB_API int (luaL_argerror) (lua_State *L, int arg, const char *extramsg);
LUALIB_API int (luaL_typeerror) (lua_State *L, int arg, const char *tname);
LUALIB_API const char *(luaL_checklstring) (lua_State *L, int arg,
size_t *l);
LUALIB_API const char *(luaL_optlstring) (lua_State *L, int arg,
const char *def, size_t *l);
LUALIB_API lua_Number (luaL_checknumber) (lua_State *L, int arg);
LUALIB_API lua_Number (luaL_optnumber) (lua_State *L, int arg, lua_Number def);
LUALIB_API lua_Integer (luaL_checkinteger) (lua_State *L, int arg);
LUALIB_API lua_Integer (luaL_optinteger) (lua_State *L, int arg,
lua_Integer def);
LUALIB_API void (luaL_checkstack) (lua_State *L, int sz, const char *msg);
LUALIB_API void (luaL_checktype) (lua_State *L, int arg, int t);
LUALIB_API void (luaL_checkany) (lua_State *L, int arg);
LUALIB_API int (luaL_newmetatable) (lua_State *L, const char *tname);
LUALIB_API void (luaL_setmetatable) (lua_State *L, const char *tname);
LUALIB_API void *(luaL_testudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void *(luaL_checkudata) (lua_State *L, int ud, const char *tname);
LUALIB_API void (luaL_where) (lua_State *L, int lvl);
LUALIB_API int (luaL_error) (lua_State *L, const char *fmt, ...);
LUALIB_API int (luaL_checkoption) (lua_State *L, int arg, const char *def,
const char *const lst[]);
LUALIB_API int (luaL_fileresult) (lua_State *L, int stat, const char *fname);
LUALIB_API int (luaL_execresult) (lua_State *L, int stat);
/* predefined references */
#define LUA_NOREF (-2)
#define LUA_REFNIL (-1)
LUALIB_API int (luaL_ref) (lua_State *L, int t);
LUALIB_API void (luaL_unref) (lua_State *L, int t, int ref);
LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
const char *mode);
#define luaL_loadfile(L,f) luaL_loadfilex(L,f,NULL)
LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,
const char *name, const char *mode);
LUALIB_API int (luaL_loadstring) (lua_State *L, const char *s);
LUALIB_API lua_State *(luaL_newstate) (void);
LUALIB_API lua_Integer (luaL_len) (lua_State *L, int idx);
LUALIB_API void (luaL_addgsub) (luaL_Buffer *b, const char *s,
const char *p, const char *r);
LUALIB_API const char *(luaL_gsub) (lua_State *L, const char *s,
const char *p, const char *r);
LUALIB_API void (luaL_setfuncs) (lua_State *L, const luaL_Reg *l, int nup);
LUALIB_API int (luaL_getsubtable) (lua_State *L, int idx, const char *fname);
LUALIB_API void (luaL_traceback) (lua_State *L, lua_State *L1,
const char *msg, int level);
LUALIB_API void (luaL_requiref) (lua_State *L, const char *modname,
lua_CFunction openf, int glb);
/*
** ===============================================================
** some useful macros
** ===============================================================
*/
#define luaL_newlibtable(L,l) \
lua_createtable(L, 0, sizeof(l)/sizeof((l)[0]) - 1)
#define luaL_newlib(L,l) \
(luaL_checkversion(L), luaL_newlibtable(L,l), luaL_setfuncs(L,l,0))
#define luaL_argcheck(L, cond,arg,extramsg) \
((void)(luai_likely(cond) || luaL_argerror(L, (arg), (extramsg))))
#define luaL_argexpected(L,cond,arg,tname) \
((void)(luai_likely(cond) || luaL_typeerror(L, (arg), (tname))))
#define luaL_checkstring(L,n) (luaL_checklstring(L, (n), NULL))
#define luaL_optstring(L,n,d) (luaL_optlstring(L, (n), (d), NULL))
#define luaL_typename(L,i) lua_typename(L, lua_type(L,(i)))
#define luaL_dofile(L, fn) \
(luaL_loadfile(L, fn) || lua_pcall(L, 0, LUA_MULTRET, 0))
#define luaL_dostring(L, s) \
(luaL_loadstring(L, s) || lua_pcall(L, 0, LUA_MULTRET, 0))
#define luaL_getmetatable(L,n) (lua_getfield(L, LUA_REGISTRYINDEX, (n)))
#define luaL_opt(L,f,n,d) (lua_isnoneornil(L,(n)) ? (d) : f(L,(n)))
#define luaL_loadbuffer(L,s,sz,n) luaL_loadbufferx(L,s,sz,n,NULL)
/*
** Perform arithmetic operations on lua_Integer values with wrap-around
** semantics, as the Lua core does.
*/
#define luaL_intop(op,v1,v2) \
((lua_Integer)((lua_Unsigned)(v1) op (lua_Unsigned)(v2)))
/* push the value used to represent failure/error */
#define luaL_pushfail(L) lua_pushnil(L)
/*
** Internal assertions for in-house debugging
*/
#if !defined(lua_assert)
#if defined LUAI_ASSERT
#include <assert.h>
#define lua_assert(c) assert(c)
#else
#define lua_assert(c) ((void)0)
#endif
#endif
/*
** {======================================================
** Generic Buffer manipulation
** =======================================================
*/
struct luaL_Buffer {
char *b; /* buffer address */
size_t size; /* buffer size */
size_t n; /* number of characters in buffer */
lua_State *L;
union {
LUAI_MAXALIGN; /* ensure maximum alignment for buffer */
char b[LUAL_BUFFERSIZE]; /* initial buffer */
} init;
};
#define luaL_bufflen(bf) ((bf)->n)
#define luaL_buffaddr(bf) ((bf)->b)
#define luaL_addchar(B,c) \
((void)((B)->n < (B)->size || luaL_prepbuffsize((B), 1)), \
((B)->b[(B)->n++] = (c)))
#define luaL_addsize(B,s) ((B)->n += (s))
#define luaL_buffsub(B,s) ((B)->n -= (s))
LUALIB_API void (luaL_buffinit) (lua_State *L, luaL_Buffer *B);
LUALIB_API char *(luaL_prepbuffsize) (luaL_Buffer *B, size_t sz);
LUALIB_API void (luaL_addlstring) (luaL_Buffer *B, const char *s, size_t l);
LUALIB_API void (luaL_addstring) (luaL_Buffer *B, const char *s);
LUALIB_API void (luaL_addvalue) (luaL_Buffer *B);
LUALIB_API void (luaL_pushresult) (luaL_Buffer *B);
LUALIB_API void (luaL_pushresultsize) (luaL_Buffer *B, size_t sz);
LUALIB_API char *(luaL_buffinitsize) (lua_State *L, luaL_Buffer *B, size_t sz);
#define luaL_prepbuffer(B) luaL_prepbuffsize(B, LUAL_BUFFERSIZE)
/* }====================================================== */
/*
** {======================================================
** File handles for IO library
** =======================================================
*/
/*
** A file handle is a userdata with metatable 'LUA_FILEHANDLE' and
** initial structure 'luaL_Stream' (it may contain other fields
** after that initial structure).
*/
#define LUA_FILEHANDLE "FILE*"
typedef struct luaL_Stream {
FILE *f; /* stream (NULL for incompletely created streams) */
lua_CFunction closef; /* to close stream (NULL for closed streams) */
} luaL_Stream;
/* }====================================================== */
/*
** {==================================================================
** "Abstraction Layer" for basic report of messages and errors
** ===================================================================
*/
/* print a string */
#if !defined(lua_writestring)
#define lua_writestring(s,l) fwrite((s), sizeof(char), (l), stdout)
#endif
/* print a newline and flush the output */
#if !defined(lua_writeline)
#define lua_writeline() (lua_writestring("\n", 1), fflush(stdout))
#endif
/* print an error message */
#if !defined(lua_writestringerror)
#define lua_writestringerror(s,p) \
(fprintf(stderr, (s), (p)), fflush(stderr))
#endif
/* }================================================================== */
/*
** {============================================================
** Compatibility with deprecated conversions
** =============================================================
*/
#if defined(LUA_COMPAT_APIINTCASTS)
#define luaL_checkunsigned(L,a) ((lua_Unsigned)luaL_checkinteger(L,a))
#define luaL_optunsigned(L,a,d) \
((lua_Unsigned)luaL_optinteger(L,a,(lua_Integer)(d)))
#define luaL_checkint(L,n) ((int)luaL_checkinteger(L, (n)))
#define luaL_optint(L,n,d) ((int)luaL_optinteger(L, (n), (d)))
#define luaL_checklong(L,n) ((long)luaL_checkinteger(L, (n)))
#define luaL_optlong(L,n,d) ((long)luaL_optinteger(L, (n), (d)))
#endif
/* }============================================================ */
#endif

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/*
** $Id: lbaselib.c $
** Basic library
** See Copyright Notice in lua.h
*/
#define lbaselib_c
#define LUA_LIB
#include "lprefix.h"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
static int luaB_print (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int i;
for (i = 1; i <= n; i++) { /* for each argument */
size_t l;
const char *s = luaL_tolstring(L, i, &l); /* convert it to string */
if (i > 1) /* not the first element? */
lua_writestring("\t", 1); /* add a tab before it */
lua_writestring(s, l); /* print it */
lua_pop(L, 1); /* pop result */
}
lua_writeline();
return 0;
}
/*
** Creates a warning with all given arguments.
** Check first for errors; otherwise an error may interrupt
** the composition of a warning, leaving it unfinished.
*/
static int luaB_warn (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int i;
luaL_checkstring(L, 1); /* at least one argument */
for (i = 2; i <= n; i++)
luaL_checkstring(L, i); /* make sure all arguments are strings */
for (i = 1; i < n; i++) /* compose warning */
lua_warning(L, lua_tostring(L, i), 1);
lua_warning(L, lua_tostring(L, n), 0); /* close warning */
return 0;
}
#define SPACECHARS " \f\n\r\t\v"
static const char *b_str2int (const char *s, int base, lua_Integer *pn) {
lua_Unsigned n = 0;
int neg = 0;
s += strspn(s, SPACECHARS); /* skip initial spaces */
if (*s == '-') { s++; neg = 1; } /* handle sign */
else if (*s == '+') s++;
if (!isalnum((unsigned char)*s)) /* no digit? */
return NULL;
do {
int digit = (isdigit((unsigned char)*s)) ? *s - '0'
: (toupper((unsigned char)*s) - 'A') + 10;
if (digit >= base) return NULL; /* invalid numeral */
n = n * base + digit;
s++;
} while (isalnum((unsigned char)*s));
s += strspn(s, SPACECHARS); /* skip trailing spaces */
*pn = (lua_Integer)((neg) ? (0u - n) : n);
return s;
}
static int luaB_tonumber (lua_State *L) {
if (lua_isnoneornil(L, 2)) { /* standard conversion? */
if (lua_type(L, 1) == LUA_TNUMBER) { /* already a number? */
lua_settop(L, 1); /* yes; return it */
return 1;
}
else {
size_t l;
const char *s = lua_tolstring(L, 1, &l);
if (s != NULL && lua_stringtonumber(L, s) == l + 1)
return 1; /* successful conversion to number */
/* else not a number */
luaL_checkany(L, 1); /* (but there must be some parameter) */
}
}
else {
size_t l;
const char *s;
lua_Integer n = 0; /* to avoid warnings */
lua_Integer base = luaL_checkinteger(L, 2);
luaL_checktype(L, 1, LUA_TSTRING); /* no numbers as strings */
s = lua_tolstring(L, 1, &l);
luaL_argcheck(L, 2 <= base && base <= 36, 2, "base out of range");
if (b_str2int(s, (int)base, &n) == s + l) {
lua_pushinteger(L, n);
return 1;
} /* else not a number */
} /* else not a number */
luaL_pushfail(L); /* not a number */
return 1;
}
static int luaB_error (lua_State *L) {
int level = (int)luaL_optinteger(L, 2, 1);
lua_settop(L, 1);
if (lua_type(L, 1) == LUA_TSTRING && level > 0) {
luaL_where(L, level); /* add extra information */
lua_pushvalue(L, 1);
lua_concat(L, 2);
}
return lua_error(L);
}
static int luaB_getmetatable (lua_State *L) {
luaL_checkany(L, 1);
if (!lua_getmetatable(L, 1)) {
lua_pushnil(L);
return 1; /* no metatable */
}
luaL_getmetafield(L, 1, "__metatable");
return 1; /* returns either __metatable field (if present) or metatable */
}
static int luaB_setmetatable (lua_State *L) {
int t = lua_type(L, 2);
luaL_checktype(L, 1, LUA_TTABLE);
luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
if (l_unlikely(luaL_getmetafield(L, 1, "__metatable") != LUA_TNIL))
return luaL_error(L, "cannot change a protected metatable");
lua_settop(L, 2);
lua_setmetatable(L, 1);
return 1;
}
static int luaB_rawequal (lua_State *L) {
luaL_checkany(L, 1);
luaL_checkany(L, 2);
lua_pushboolean(L, lua_rawequal(L, 1, 2));
return 1;
}
static int luaB_rawlen (lua_State *L) {
int t = lua_type(L, 1);
luaL_argexpected(L, t == LUA_TTABLE || t == LUA_TSTRING, 1,
"table or string");
lua_pushinteger(L, lua_rawlen(L, 1));
return 1;
}
static int luaB_rawget (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checkany(L, 2);
lua_settop(L, 2);
lua_rawget(L, 1);
return 1;
}
static int luaB_rawset (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
luaL_checkany(L, 2);
luaL_checkany(L, 3);
lua_settop(L, 3);
lua_rawset(L, 1);
return 1;
}
static int pushmode (lua_State *L, int oldmode) {
if (oldmode == -1)
luaL_pushfail(L); /* invalid call to 'lua_gc' */
else
lua_pushstring(L, (oldmode == LUA_GCINC) ? "incremental"
: "generational");
return 1;
}
/*
** check whether call to 'lua_gc' was valid (not inside a finalizer)
*/
#define checkvalres(res) { if (res == -1) break; }
static int luaB_collectgarbage (lua_State *L) {
static const char *const opts[] = {"stop", "restart", "collect",
"count", "step", "setpause", "setstepmul",
"isrunning", "generational", "incremental", NULL};
static const int optsnum[] = {LUA_GCSTOP, LUA_GCRESTART, LUA_GCCOLLECT,
LUA_GCCOUNT, LUA_GCSTEP, LUA_GCSETPAUSE, LUA_GCSETSTEPMUL,
LUA_GCISRUNNING, LUA_GCGEN, LUA_GCINC};
int o = optsnum[luaL_checkoption(L, 1, "collect", opts)];
switch (o) {
case LUA_GCCOUNT: {
int k = lua_gc(L, o);
int b = lua_gc(L, LUA_GCCOUNTB);
checkvalres(k);
lua_pushnumber(L, (lua_Number)k + ((lua_Number)b/1024));
return 1;
}
case LUA_GCSTEP: {
int step = (int)luaL_optinteger(L, 2, 0);
int res = lua_gc(L, o, step);
checkvalres(res);
lua_pushboolean(L, res);
return 1;
}
case LUA_GCSETPAUSE:
case LUA_GCSETSTEPMUL: {
int p = (int)luaL_optinteger(L, 2, 0);
int previous = lua_gc(L, o, p);
checkvalres(previous);
lua_pushinteger(L, previous);
return 1;
}
case LUA_GCISRUNNING: {
int res = lua_gc(L, o);
checkvalres(res);
lua_pushboolean(L, res);
return 1;
}
case LUA_GCGEN: {
int minormul = (int)luaL_optinteger(L, 2, 0);
int majormul = (int)luaL_optinteger(L, 3, 0);
return pushmode(L, lua_gc(L, o, minormul, majormul));
}
case LUA_GCINC: {
int pause = (int)luaL_optinteger(L, 2, 0);
int stepmul = (int)luaL_optinteger(L, 3, 0);
int stepsize = (int)luaL_optinteger(L, 4, 0);
return pushmode(L, lua_gc(L, o, pause, stepmul, stepsize));
}
default: {
int res = lua_gc(L, o);
checkvalres(res);
lua_pushinteger(L, res);
return 1;
}
}
luaL_pushfail(L); /* invalid call (inside a finalizer) */
return 1;
}
static int luaB_type (lua_State *L) {
int t = lua_type(L, 1);
luaL_argcheck(L, t != LUA_TNONE, 1, "value expected");
lua_pushstring(L, lua_typename(L, t));
return 1;
}
static int luaB_next (lua_State *L) {
luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 2); /* create a 2nd argument if there isn't one */
if (lua_next(L, 1))
return 2;
else {
lua_pushnil(L);
return 1;
}
}
static int pairscont (lua_State *L, int status, lua_KContext k) {
(void)L; (void)status; (void)k; /* unused */
return 3;
}
static int luaB_pairs (lua_State *L) {
luaL_checkany(L, 1);
if (luaL_getmetafield(L, 1, "__pairs") == LUA_TNIL) { /* no metamethod? */
lua_pushcfunction(L, luaB_next); /* will return generator, */
lua_pushvalue(L, 1); /* state, */
lua_pushnil(L); /* and initial value */
}
else {
lua_pushvalue(L, 1); /* argument 'self' to metamethod */
lua_callk(L, 1, 3, 0, pairscont); /* get 3 values from metamethod */
}
return 3;
}
/*
** Traversal function for 'ipairs'
*/
static int ipairsaux (lua_State *L) {
lua_Integer i = luaL_checkinteger(L, 2);
i = luaL_intop(+, i, 1);
lua_pushinteger(L, i);
return (lua_geti(L, 1, i) == LUA_TNIL) ? 1 : 2;
}
/*
** 'ipairs' function. Returns 'ipairsaux', given "table", 0.
** (The given "table" may not be a table.)
*/
static int luaB_ipairs (lua_State *L) {
luaL_checkany(L, 1);
lua_pushcfunction(L, ipairsaux); /* iteration function */
lua_pushvalue(L, 1); /* state */
lua_pushinteger(L, 0); /* initial value */
return 3;
}
static int load_aux (lua_State *L, int status, int envidx) {
if (l_likely(status == LUA_OK)) {
if (envidx != 0) { /* 'env' parameter? */
lua_pushvalue(L, envidx); /* environment for loaded function */
if (!lua_setupvalue(L, -2, 1)) /* set it as 1st upvalue */
lua_pop(L, 1); /* remove 'env' if not used by previous call */
}
return 1;
}
else { /* error (message is on top of the stack) */
luaL_pushfail(L);
lua_insert(L, -2); /* put before error message */
return 2; /* return fail plus error message */
}
}
static int luaB_loadfile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL);
const char *mode = luaL_optstring(L, 2, NULL);
int env = (!lua_isnone(L, 3) ? 3 : 0); /* 'env' index or 0 if no 'env' */
int status = luaL_loadfilex(L, fname, mode);
return load_aux(L, status, env);
}
/*
** {======================================================
** Generic Read function
** =======================================================
*/
/*
** reserved slot, above all arguments, to hold a copy of the returned
** string to avoid it being collected while parsed. 'load' has four
** optional arguments (chunk, source name, mode, and environment).
*/
#define RESERVEDSLOT 5
/*
** Reader for generic 'load' function: 'lua_load' uses the
** stack for internal stuff, so the reader cannot change the
** stack top. Instead, it keeps its resulting string in a
** reserved slot inside the stack.
*/
static const char *generic_reader (lua_State *L, void *ud, size_t *size) {
(void)(ud); /* not used */
luaL_checkstack(L, 2, "too many nested functions");
lua_pushvalue(L, 1); /* get function */
lua_call(L, 0, 1); /* call it */
if (lua_isnil(L, -1)) {
lua_pop(L, 1); /* pop result */
*size = 0;
return NULL;
}
else if (l_unlikely(!lua_isstring(L, -1)))
luaL_error(L, "reader function must return a string");
lua_replace(L, RESERVEDSLOT); /* save string in reserved slot */
return lua_tolstring(L, RESERVEDSLOT, size);
}
static int luaB_load (lua_State *L) {
int status;
size_t l;
const char *s = lua_tolstring(L, 1, &l);
const char *mode = luaL_optstring(L, 3, "bt");
int env = (!lua_isnone(L, 4) ? 4 : 0); /* 'env' index or 0 if no 'env' */
if (s != NULL) { /* loading a string? */
const char *chunkname = luaL_optstring(L, 2, s);
status = luaL_loadbufferx(L, s, l, chunkname, mode);
}
else { /* loading from a reader function */
const char *chunkname = luaL_optstring(L, 2, "=(load)");
luaL_checktype(L, 1, LUA_TFUNCTION);
lua_settop(L, RESERVEDSLOT); /* create reserved slot */
status = lua_load(L, generic_reader, NULL, chunkname, mode);
}
return load_aux(L, status, env);
}
/* }====================================================== */
static int dofilecont (lua_State *L, int d1, lua_KContext d2) {
(void)d1; (void)d2; /* only to match 'lua_Kfunction' prototype */
return lua_gettop(L) - 1;
}
static int luaB_dofile (lua_State *L) {
const char *fname = luaL_optstring(L, 1, NULL);
lua_settop(L, 1);
if (l_unlikely(luaL_loadfile(L, fname) != LUA_OK))
return lua_error(L);
lua_callk(L, 0, LUA_MULTRET, 0, dofilecont);
return dofilecont(L, 0, 0);
}
static int luaB_assert (lua_State *L) {
if (l_likely(lua_toboolean(L, 1))) /* condition is true? */
return lua_gettop(L); /* return all arguments */
else { /* error */
luaL_checkany(L, 1); /* there must be a condition */
lua_remove(L, 1); /* remove it */
lua_pushliteral(L, "assertion failed!"); /* default message */
lua_settop(L, 1); /* leave only message (default if no other one) */
return luaB_error(L); /* call 'error' */
}
}
static int luaB_select (lua_State *L) {
int n = lua_gettop(L);
if (lua_type(L, 1) == LUA_TSTRING && *lua_tostring(L, 1) == '#') {
lua_pushinteger(L, n-1);
return 1;
}
else {
lua_Integer i = luaL_checkinteger(L, 1);
if (i < 0) i = n + i;
else if (i > n) i = n;
luaL_argcheck(L, 1 <= i, 1, "index out of range");
return n - (int)i;
}
}
/*
** Continuation function for 'pcall' and 'xpcall'. Both functions
** already pushed a 'true' before doing the call, so in case of success
** 'finishpcall' only has to return everything in the stack minus
** 'extra' values (where 'extra' is exactly the number of items to be
** ignored).
*/
static int finishpcall (lua_State *L, int status, lua_KContext extra) {
if (l_unlikely(status != LUA_OK && status != LUA_YIELD)) { /* error? */
lua_pushboolean(L, 0); /* first result (false) */
lua_pushvalue(L, -2); /* error message */
return 2; /* return false, msg */
}
else
return lua_gettop(L) - (int)extra; /* return all results */
}
static int luaB_pcall (lua_State *L) {
int status;
luaL_checkany(L, 1);
lua_pushboolean(L, 1); /* first result if no errors */
lua_insert(L, 1); /* put it in place */
status = lua_pcallk(L, lua_gettop(L) - 2, LUA_MULTRET, 0, 0, finishpcall);
return finishpcall(L, status, 0);
}
/*
** Do a protected call with error handling. After 'lua_rotate', the
** stack will have <f, err, true, f, [args...]>; so, the function passes
** 2 to 'finishpcall' to skip the 2 first values when returning results.
*/
static int luaB_xpcall (lua_State *L) {
int status;
int n = lua_gettop(L);
luaL_checktype(L, 2, LUA_TFUNCTION); /* check error function */
lua_pushboolean(L, 1); /* first result */
lua_pushvalue(L, 1); /* function */
lua_rotate(L, 3, 2); /* move them below function's arguments */
status = lua_pcallk(L, n - 2, LUA_MULTRET, 2, 2, finishpcall);
return finishpcall(L, status, 2);
}
static int luaB_tostring (lua_State *L) {
luaL_checkany(L, 1);
luaL_tolstring(L, 1, NULL);
return 1;
}
static const luaL_Reg base_funcs[] = {
{"assert", luaB_assert},
{"collectgarbage", luaB_collectgarbage},
{"dofile", luaB_dofile},
{"error", luaB_error},
{"getmetatable", luaB_getmetatable},
{"ipairs", luaB_ipairs},
{"loadfile", luaB_loadfile},
{"load", luaB_load},
{"next", luaB_next},
{"pairs", luaB_pairs},
{"pcall", luaB_pcall},
{"print", luaB_print},
{"warn", luaB_warn},
{"rawequal", luaB_rawequal},
{"rawlen", luaB_rawlen},
{"rawget", luaB_rawget},
{"rawset", luaB_rawset},
{"select", luaB_select},
{"setmetatable", luaB_setmetatable},
{"tonumber", luaB_tonumber},
{"tostring", luaB_tostring},
{"type", luaB_type},
{"xpcall", luaB_xpcall},
/* placeholders */
{LUA_GNAME, NULL},
{"_VERSION", NULL},
{NULL, NULL}
};
LUAMOD_API int luaopen_base (lua_State *L) {
/* open lib into global table */
lua_pushglobaltable(L);
luaL_setfuncs(L, base_funcs, 0);
/* set global _G */
lua_pushvalue(L, -1);
lua_setfield(L, -2, LUA_GNAME);
/* set global _VERSION */
lua_pushliteral(L, LUA_VERSION);
lua_setfield(L, -2, "_VERSION");
return 1;
}

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/*
** $Id: lcode.h $
** Code generator for Lua
** See Copyright Notice in lua.h
*/
#ifndef lcode_h
#define lcode_h
#include "llex.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lparser.h"
/*
** Marks the end of a patch list. It is an invalid value both as an absolute
** address, and as a list link (would link an element to itself).
*/
#define NO_JUMP (-1)
/*
** grep "ORDER OPR" if you change these enums (ORDER OP)
*/
typedef enum BinOpr {
/* arithmetic operators */
OPR_ADD, OPR_SUB, OPR_MUL, OPR_MOD, OPR_POW,
OPR_DIV, OPR_IDIV,
/* bitwise operators */
OPR_BAND, OPR_BOR, OPR_BXOR,
OPR_SHL, OPR_SHR,
/* string operator */
OPR_CONCAT,
/* comparison operators */
OPR_EQ, OPR_LT, OPR_LE,
OPR_NE, OPR_GT, OPR_GE,
/* logical operators */
OPR_AND, OPR_OR,
OPR_NOBINOPR
} BinOpr;
/* true if operation is foldable (that is, it is arithmetic or bitwise) */
#define foldbinop(op) ((op) <= OPR_SHR)
#define luaK_codeABC(fs,o,a,b,c) luaK_codeABCk(fs,o,a,b,c,0)
typedef enum UnOpr { OPR_MINUS, OPR_BNOT, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
/* get (pointer to) instruction of given 'expdesc' */
#define getinstruction(fs,e) ((fs)->f->code[(e)->u.info])
#define luaK_setmultret(fs,e) luaK_setreturns(fs, e, LUA_MULTRET)
#define luaK_jumpto(fs,t) luaK_patchlist(fs, luaK_jump(fs), t)
LUAI_FUNC int luaK_code (FuncState *fs, Instruction i);
LUAI_FUNC int luaK_codeABx (FuncState *fs, OpCode o, int A, unsigned int Bx);
LUAI_FUNC int luaK_codeABCk (FuncState *fs, OpCode o, int A,
int B, int C, int k);
LUAI_FUNC int luaK_exp2const (FuncState *fs, const expdesc *e, TValue *v);
LUAI_FUNC void luaK_fixline (FuncState *fs, int line);
LUAI_FUNC void luaK_nil (FuncState *fs, int from, int n);
LUAI_FUNC void luaK_reserveregs (FuncState *fs, int n);
LUAI_FUNC void luaK_checkstack (FuncState *fs, int n);
LUAI_FUNC void luaK_int (FuncState *fs, int reg, lua_Integer n);
LUAI_FUNC void luaK_dischargevars (FuncState *fs, expdesc *e);
LUAI_FUNC int luaK_exp2anyreg (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2anyregup (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2nextreg (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_exp2val (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_self (FuncState *fs, expdesc *e, expdesc *key);
LUAI_FUNC void luaK_indexed (FuncState *fs, expdesc *t, expdesc *k);
LUAI_FUNC void luaK_goiftrue (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_goiffalse (FuncState *fs, expdesc *e);
LUAI_FUNC void luaK_storevar (FuncState *fs, expdesc *var, expdesc *e);
LUAI_FUNC void luaK_setreturns (FuncState *fs, expdesc *e, int nresults);
LUAI_FUNC void luaK_setoneret (FuncState *fs, expdesc *e);
LUAI_FUNC int luaK_jump (FuncState *fs);
LUAI_FUNC void luaK_ret (FuncState *fs, int first, int nret);
LUAI_FUNC void luaK_patchlist (FuncState *fs, int list, int target);
LUAI_FUNC void luaK_patchtohere (FuncState *fs, int list);
LUAI_FUNC void luaK_concat (FuncState *fs, int *l1, int l2);
LUAI_FUNC int luaK_getlabel (FuncState *fs);
LUAI_FUNC void luaK_prefix (FuncState *fs, UnOpr op, expdesc *v, int line);
LUAI_FUNC void luaK_infix (FuncState *fs, BinOpr op, expdesc *v);
LUAI_FUNC void luaK_posfix (FuncState *fs, BinOpr op, expdesc *v1,
expdesc *v2, int line);
LUAI_FUNC void luaK_settablesize (FuncState *fs, int pc,
int ra, int asize, int hsize);
LUAI_FUNC void luaK_setlist (FuncState *fs, int base, int nelems, int tostore);
LUAI_FUNC void luaK_finish (FuncState *fs);
LUAI_FUNC l_noret luaK_semerror (LexState *ls, const char *msg);
#endif

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/*
** $Id: lcorolib.c $
** Coroutine Library
** See Copyright Notice in lua.h
*/
#define lcorolib_c
#define LUA_LIB
#include "lprefix.h"
#include <stdlib.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
static lua_State *getco (lua_State *L) {
lua_State *co = lua_tothread(L, 1);
luaL_argexpected(L, co, 1, "thread");
return co;
}
/*
** Resumes a coroutine. Returns the number of results for non-error
** cases or -1 for errors.
*/
static int auxresume (lua_State *L, lua_State *co, int narg) {
int status, nres;
if (l_unlikely(!lua_checkstack(co, narg))) {
lua_pushliteral(L, "too many arguments to resume");
return -1; /* error flag */
}
lua_xmove(L, co, narg);
status = lua_resume(co, L, narg, &nres);
if (l_likely(status == LUA_OK || status == LUA_YIELD)) {
if (l_unlikely(!lua_checkstack(L, nres + 1))) {
lua_pop(co, nres); /* remove results anyway */
lua_pushliteral(L, "too many results to resume");
return -1; /* error flag */
}
lua_xmove(co, L, nres); /* move yielded values */
return nres;
}
else {
lua_xmove(co, L, 1); /* move error message */
return -1; /* error flag */
}
}
static int luaB_coresume (lua_State *L) {
lua_State *co = getco(L);
int r;
r = auxresume(L, co, lua_gettop(L) - 1);
if (l_unlikely(r < 0)) {
lua_pushboolean(L, 0);
lua_insert(L, -2);
return 2; /* return false + error message */
}
else {
lua_pushboolean(L, 1);
lua_insert(L, -(r + 1));
return r + 1; /* return true + 'resume' returns */
}
}
static int luaB_auxwrap (lua_State *L) {
lua_State *co = lua_tothread(L, lua_upvalueindex(1));
int r = auxresume(L, co, lua_gettop(L));
if (l_unlikely(r < 0)) { /* error? */
int stat = lua_status(co);
if (stat != LUA_OK && stat != LUA_YIELD) { /* error in the coroutine? */
stat = lua_closethread(co, L); /* close its tbc variables */
lua_assert(stat != LUA_OK);
lua_xmove(co, L, 1); /* move error message to the caller */
}
if (stat != LUA_ERRMEM && /* not a memory error and ... */
lua_type(L, -1) == LUA_TSTRING) { /* ... error object is a string? */
luaL_where(L, 1); /* add extra info, if available */
lua_insert(L, -2);
lua_concat(L, 2);
}
return lua_error(L); /* propagate error */
}
return r;
}
static int luaB_cocreate (lua_State *L) {
lua_State *NL;
luaL_checktype(L, 1, LUA_TFUNCTION);
NL = lua_newthread(L);
lua_pushvalue(L, 1); /* move function to top */
lua_xmove(L, NL, 1); /* move function from L to NL */
return 1;
}
static int luaB_cowrap (lua_State *L) {
luaB_cocreate(L);
lua_pushcclosure(L, luaB_auxwrap, 1);
return 1;
}
static int luaB_yield (lua_State *L) {
return lua_yield(L, lua_gettop(L));
}
#define COS_RUN 0
#define COS_DEAD 1
#define COS_YIELD 2
#define COS_NORM 3
static const char *const statname[] =
{"running", "dead", "suspended", "normal"};
static int auxstatus (lua_State *L, lua_State *co) {
if (L == co) return COS_RUN;
else {
switch (lua_status(co)) {
case LUA_YIELD:
return COS_YIELD;
case LUA_OK: {
lua_Debug ar;
if (lua_getstack(co, 0, &ar)) /* does it have frames? */
return COS_NORM; /* it is running */
else if (lua_gettop(co) == 0)
return COS_DEAD;
else
return COS_YIELD; /* initial state */
}
default: /* some error occurred */
return COS_DEAD;
}
}
}
static int luaB_costatus (lua_State *L) {
lua_State *co = getco(L);
lua_pushstring(L, statname[auxstatus(L, co)]);
return 1;
}
static int luaB_yieldable (lua_State *L) {
lua_State *co = lua_isnone(L, 1) ? L : getco(L);
lua_pushboolean(L, lua_isyieldable(co));
return 1;
}
static int luaB_corunning (lua_State *L) {
int ismain = lua_pushthread(L);
lua_pushboolean(L, ismain);
return 2;
}
static int luaB_close (lua_State *L) {
lua_State *co = getco(L);
int status = auxstatus(L, co);
switch (status) {
case COS_DEAD: case COS_YIELD: {
status = lua_closethread(co, L);
if (status == LUA_OK) {
lua_pushboolean(L, 1);
return 1;
}
else {
lua_pushboolean(L, 0);
lua_xmove(co, L, 1); /* move error message */
return 2;
}
}
default: /* normal or running coroutine */
return luaL_error(L, "cannot close a %s coroutine", statname[status]);
}
}
static const luaL_Reg co_funcs[] = {
{"create", luaB_cocreate},
{"resume", luaB_coresume},
{"running", luaB_corunning},
{"status", luaB_costatus},
{"wrap", luaB_cowrap},
{"yield", luaB_yield},
{"isyieldable", luaB_yieldable},
{"close", luaB_close},
{NULL, NULL}
};
LUAMOD_API int luaopen_coroutine (lua_State *L) {
luaL_newlib(L, co_funcs);
return 1;
}

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/*
** $Id: lctype.c $
** 'ctype' functions for Lua
** See Copyright Notice in lua.h
*/
#define lctype_c
#define LUA_CORE
#include "lprefix.h"
#include "lctype.h"
#if !LUA_USE_CTYPE /* { */
#include <limits.h>
#if defined (LUA_UCID) /* accept UniCode IDentifiers? */
/* consider all non-ascii codepoints to be alphabetic */
#define NONA 0x01
#else
#define NONA 0x00 /* default */
#endif
LUAI_DDEF const lu_byte luai_ctype_[UCHAR_MAX + 2] = {
0x00, /* EOZ */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0. */
0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1. */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x0c, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, /* 2. */
0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
0x16, 0x16, 0x16, 0x16, 0x16, 0x16, 0x16, 0x16, /* 3. */
0x16, 0x16, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
0x04, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x05, /* 4. */
0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, /* 5. */
0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x05,
0x04, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x05, /* 6. */
0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, /* 7. */
0x05, 0x05, 0x05, 0x04, 0x04, 0x04, 0x04, 0x00,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* 8. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* 9. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* a. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* b. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
0x00, 0x00, NONA, NONA, NONA, NONA, NONA, NONA, /* c. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* d. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA, /* e. */
NONA, NONA, NONA, NONA, NONA, NONA, NONA, NONA,
NONA, NONA, NONA, NONA, NONA, 0x00, 0x00, 0x00, /* f. */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#endif /* } */

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/*
** $Id: lctype.h $
** 'ctype' functions for Lua
** See Copyright Notice in lua.h
*/
#ifndef lctype_h
#define lctype_h
#include "lua.h"
/*
** WARNING: the functions defined here do not necessarily correspond
** to the similar functions in the standard C ctype.h. They are
** optimized for the specific needs of Lua.
*/
#if !defined(LUA_USE_CTYPE)
#if 'A' == 65 && '0' == 48
/* ASCII case: can use its own tables; faster and fixed */
#define LUA_USE_CTYPE 0
#else
/* must use standard C ctype */
#define LUA_USE_CTYPE 1
#endif
#endif
#if !LUA_USE_CTYPE /* { */
#include <limits.h>
#include "llimits.h"
#define ALPHABIT 0
#define DIGITBIT 1
#define PRINTBIT 2
#define SPACEBIT 3
#define XDIGITBIT 4
#define MASK(B) (1 << (B))
/*
** add 1 to char to allow index -1 (EOZ)
*/
#define testprop(c,p) (luai_ctype_[(c)+1] & (p))
/*
** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_'
*/
#define lislalpha(c) testprop(c, MASK(ALPHABIT))
#define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT)))
#define lisdigit(c) testprop(c, MASK(DIGITBIT))
#define lisspace(c) testprop(c, MASK(SPACEBIT))
#define lisprint(c) testprop(c, MASK(PRINTBIT))
#define lisxdigit(c) testprop(c, MASK(XDIGITBIT))
/*
** In ASCII, this 'ltolower' is correct for alphabetic characters and
** for '.'. That is enough for Lua needs. ('check_exp' ensures that
** the character either is an upper-case letter or is unchanged by
** the transformation, which holds for lower-case letters and '.'.)
*/
#define ltolower(c) \
check_exp(('A' <= (c) && (c) <= 'Z') || (c) == ((c) | ('A' ^ 'a')), \
(c) | ('A' ^ 'a'))
/* one entry for each character and for -1 (EOZ) */
LUAI_DDEC(const lu_byte luai_ctype_[UCHAR_MAX + 2];)
#else /* }{ */
/*
** use standard C ctypes
*/
#include <ctype.h>
#define lislalpha(c) (isalpha(c) || (c) == '_')
#define lislalnum(c) (isalnum(c) || (c) == '_')
#define lisdigit(c) (isdigit(c))
#define lisspace(c) (isspace(c))
#define lisprint(c) (isprint(c))
#define lisxdigit(c) (isxdigit(c))
#define ltolower(c) (tolower(c))
#endif /* } */
#endif

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/*
** $Id: ldblib.c $
** Interface from Lua to its debug API
** See Copyright Notice in lua.h
*/
#define ldblib_c
#define LUA_LIB
#include "lprefix.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/*
** The hook table at registry[HOOKKEY] maps threads to their current
** hook function.
*/
static const char *const HOOKKEY = "_HOOKKEY";
/*
** If L1 != L, L1 can be in any state, and therefore there are no
** guarantees about its stack space; any push in L1 must be
** checked.
*/
static void checkstack (lua_State *L, lua_State *L1, int n) {
if (l_unlikely(L != L1 && !lua_checkstack(L1, n)))
luaL_error(L, "stack overflow");
}
static int db_getregistry (lua_State *L) {
lua_pushvalue(L, LUA_REGISTRYINDEX);
return 1;
}
static int db_getmetatable (lua_State *L) {
luaL_checkany(L, 1);
if (!lua_getmetatable(L, 1)) {
lua_pushnil(L); /* no metatable */
}
return 1;
}
static int db_setmetatable (lua_State *L) {
int t = lua_type(L, 2);
luaL_argexpected(L, t == LUA_TNIL || t == LUA_TTABLE, 2, "nil or table");
lua_settop(L, 2);
lua_setmetatable(L, 1);
return 1; /* return 1st argument */
}
static int db_getuservalue (lua_State *L) {
int n = (int)luaL_optinteger(L, 2, 1);
if (lua_type(L, 1) != LUA_TUSERDATA)
luaL_pushfail(L);
else if (lua_getiuservalue(L, 1, n) != LUA_TNONE) {
lua_pushboolean(L, 1);
return 2;
}
return 1;
}
static int db_setuservalue (lua_State *L) {
int n = (int)luaL_optinteger(L, 3, 1);
luaL_checktype(L, 1, LUA_TUSERDATA);
luaL_checkany(L, 2);
lua_settop(L, 2);
if (!lua_setiuservalue(L, 1, n))
luaL_pushfail(L);
return 1;
}
/*
** Auxiliary function used by several library functions: check for
** an optional thread as function's first argument and set 'arg' with
** 1 if this argument is present (so that functions can skip it to
** access their other arguments)
*/
static lua_State *getthread (lua_State *L, int *arg) {
if (lua_isthread(L, 1)) {
*arg = 1;
return lua_tothread(L, 1);
}
else {
*arg = 0;
return L; /* function will operate over current thread */
}
}
/*
** Variations of 'lua_settable', used by 'db_getinfo' to put results
** from 'lua_getinfo' into result table. Key is always a string;
** value can be a string, an int, or a boolean.
*/
static void settabss (lua_State *L, const char *k, const char *v) {
lua_pushstring(L, v);
lua_setfield(L, -2, k);
}
static void settabsi (lua_State *L, const char *k, int v) {
lua_pushinteger(L, v);
lua_setfield(L, -2, k);
}
static void settabsb (lua_State *L, const char *k, int v) {
lua_pushboolean(L, v);
lua_setfield(L, -2, k);
}
/*
** In function 'db_getinfo', the call to 'lua_getinfo' may push
** results on the stack; later it creates the result table to put
** these objects. Function 'treatstackoption' puts the result from
** 'lua_getinfo' on top of the result table so that it can call
** 'lua_setfield'.
*/
static void treatstackoption (lua_State *L, lua_State *L1, const char *fname) {
if (L == L1)
lua_rotate(L, -2, 1); /* exchange object and table */
else
lua_xmove(L1, L, 1); /* move object to the "main" stack */
lua_setfield(L, -2, fname); /* put object into table */
}
/*
** Calls 'lua_getinfo' and collects all results in a new table.
** L1 needs stack space for an optional input (function) plus
** two optional outputs (function and line table) from function
** 'lua_getinfo'.
*/
static int db_getinfo (lua_State *L) {
lua_Debug ar;
int arg;
lua_State *L1 = getthread(L, &arg);
const char *options = luaL_optstring(L, arg+2, "flnSrtu");
checkstack(L, L1, 3);
luaL_argcheck(L, options[0] != '>', arg + 2, "invalid option '>'");
if (lua_isfunction(L, arg + 1)) { /* info about a function? */
options = lua_pushfstring(L, ">%s", options); /* add '>' to 'options' */
lua_pushvalue(L, arg + 1); /* move function to 'L1' stack */
lua_xmove(L, L1, 1);
}
else { /* stack level */
if (!lua_getstack(L1, (int)luaL_checkinteger(L, arg + 1), &ar)) {
luaL_pushfail(L); /* level out of range */
return 1;
}
}
if (!lua_getinfo(L1, options, &ar))
return luaL_argerror(L, arg+2, "invalid option");
lua_newtable(L); /* table to collect results */
if (strchr(options, 'S')) {
lua_pushlstring(L, ar.source, ar.srclen);
lua_setfield(L, -2, "source");
settabss(L, "short_src", ar.short_src);
settabsi(L, "linedefined", ar.linedefined);
settabsi(L, "lastlinedefined", ar.lastlinedefined);
settabss(L, "what", ar.what);
}
if (strchr(options, 'l'))
settabsi(L, "currentline", ar.currentline);
if (strchr(options, 'u')) {
settabsi(L, "nups", ar.nups);
settabsi(L, "nparams", ar.nparams);
settabsb(L, "isvararg", ar.isvararg);
}
if (strchr(options, 'n')) {
settabss(L, "name", ar.name);
settabss(L, "namewhat", ar.namewhat);
}
if (strchr(options, 'r')) {
settabsi(L, "ftransfer", ar.ftransfer);
settabsi(L, "ntransfer", ar.ntransfer);
}
if (strchr(options, 't'))
settabsb(L, "istailcall", ar.istailcall);
if (strchr(options, 'L'))
treatstackoption(L, L1, "activelines");
if (strchr(options, 'f'))
treatstackoption(L, L1, "func");
return 1; /* return table */
}
static int db_getlocal (lua_State *L) {
int arg;
lua_State *L1 = getthread(L, &arg);
int nvar = (int)luaL_checkinteger(L, arg + 2); /* local-variable index */
if (lua_isfunction(L, arg + 1)) { /* function argument? */
lua_pushvalue(L, arg + 1); /* push function */
lua_pushstring(L, lua_getlocal(L, NULL, nvar)); /* push local name */
return 1; /* return only name (there is no value) */
}
else { /* stack-level argument */
lua_Debug ar;
const char *name;
int level = (int)luaL_checkinteger(L, arg + 1);
if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */
return luaL_argerror(L, arg+1, "level out of range");
checkstack(L, L1, 1);
name = lua_getlocal(L1, &ar, nvar);
if (name) {
lua_xmove(L1, L, 1); /* move local value */
lua_pushstring(L, name); /* push name */
lua_rotate(L, -2, 1); /* re-order */
return 2;
}
else {
luaL_pushfail(L); /* no name (nor value) */
return 1;
}
}
}
static int db_setlocal (lua_State *L) {
int arg;
const char *name;
lua_State *L1 = getthread(L, &arg);
lua_Debug ar;
int level = (int)luaL_checkinteger(L, arg + 1);
int nvar = (int)luaL_checkinteger(L, arg + 2);
if (l_unlikely(!lua_getstack(L1, level, &ar))) /* out of range? */
return luaL_argerror(L, arg+1, "level out of range");
luaL_checkany(L, arg+3);
lua_settop(L, arg+3);
checkstack(L, L1, 1);
lua_xmove(L, L1, 1);
name = lua_setlocal(L1, &ar, nvar);
if (name == NULL)
lua_pop(L1, 1); /* pop value (if not popped by 'lua_setlocal') */
lua_pushstring(L, name);
return 1;
}
/*
** get (if 'get' is true) or set an upvalue from a closure
*/
static int auxupvalue (lua_State *L, int get) {
const char *name;
int n = (int)luaL_checkinteger(L, 2); /* upvalue index */
luaL_checktype(L, 1, LUA_TFUNCTION); /* closure */
name = get ? lua_getupvalue(L, 1, n) : lua_setupvalue(L, 1, n);
if (name == NULL) return 0;
lua_pushstring(L, name);
lua_insert(L, -(get+1)); /* no-op if get is false */
return get + 1;
}
static int db_getupvalue (lua_State *L) {
return auxupvalue(L, 1);
}
static int db_setupvalue (lua_State *L) {
luaL_checkany(L, 3);
return auxupvalue(L, 0);
}
/*
** Check whether a given upvalue from a given closure exists and
** returns its index
*/
static void *checkupval (lua_State *L, int argf, int argnup, int *pnup) {
void *id;
int nup = (int)luaL_checkinteger(L, argnup); /* upvalue index */
luaL_checktype(L, argf, LUA_TFUNCTION); /* closure */
id = lua_upvalueid(L, argf, nup);
if (pnup) {
luaL_argcheck(L, id != NULL, argnup, "invalid upvalue index");
*pnup = nup;
}
return id;
}
static int db_upvalueid (lua_State *L) {
void *id = checkupval(L, 1, 2, NULL);
if (id != NULL)
lua_pushlightuserdata(L, id);
else
luaL_pushfail(L);
return 1;
}
static int db_upvaluejoin (lua_State *L) {
int n1, n2;
checkupval(L, 1, 2, &n1);
checkupval(L, 3, 4, &n2);
luaL_argcheck(L, !lua_iscfunction(L, 1), 1, "Lua function expected");
luaL_argcheck(L, !lua_iscfunction(L, 3), 3, "Lua function expected");
lua_upvaluejoin(L, 1, n1, 3, n2);
return 0;
}
/*
** Call hook function registered at hook table for the current
** thread (if there is one)
*/
static void hookf (lua_State *L, lua_Debug *ar) {
static const char *const hooknames[] =
{"call", "return", "line", "count", "tail call"};
lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
lua_pushthread(L);
if (lua_rawget(L, -2) == LUA_TFUNCTION) { /* is there a hook function? */
lua_pushstring(L, hooknames[(int)ar->event]); /* push event name */
if (ar->currentline >= 0)
lua_pushinteger(L, ar->currentline); /* push current line */
else lua_pushnil(L);
lua_assert(lua_getinfo(L, "lS", ar));
lua_call(L, 2, 0); /* call hook function */
}
}
/*
** Convert a string mask (for 'sethook') into a bit mask
*/
static int makemask (const char *smask, int count) {
int mask = 0;
if (strchr(smask, 'c')) mask |= LUA_MASKCALL;
if (strchr(smask, 'r')) mask |= LUA_MASKRET;
if (strchr(smask, 'l')) mask |= LUA_MASKLINE;
if (count > 0) mask |= LUA_MASKCOUNT;
return mask;
}
/*
** Convert a bit mask (for 'gethook') into a string mask
*/
static char *unmakemask (int mask, char *smask) {
int i = 0;
if (mask & LUA_MASKCALL) smask[i++] = 'c';
if (mask & LUA_MASKRET) smask[i++] = 'r';
if (mask & LUA_MASKLINE) smask[i++] = 'l';
smask[i] = '\0';
return smask;
}
static int db_sethook (lua_State *L) {
int arg, mask, count;
lua_Hook func;
lua_State *L1 = getthread(L, &arg);
if (lua_isnoneornil(L, arg+1)) { /* no hook? */
lua_settop(L, arg+1);
func = NULL; mask = 0; count = 0; /* turn off hooks */
}
else {
const char *smask = luaL_checkstring(L, arg+2);
luaL_checktype(L, arg+1, LUA_TFUNCTION);
count = (int)luaL_optinteger(L, arg + 3, 0);
func = hookf; mask = makemask(smask, count);
}
if (!luaL_getsubtable(L, LUA_REGISTRYINDEX, HOOKKEY)) {
/* table just created; initialize it */
lua_pushliteral(L, "k");
lua_setfield(L, -2, "__mode"); /** hooktable.__mode = "k" */
lua_pushvalue(L, -1);
lua_setmetatable(L, -2); /* metatable(hooktable) = hooktable */
}
checkstack(L, L1, 1);
lua_pushthread(L1); lua_xmove(L1, L, 1); /* key (thread) */
lua_pushvalue(L, arg + 1); /* value (hook function) */
lua_rawset(L, -3); /* hooktable[L1] = new Lua hook */
lua_sethook(L1, func, mask, count);
return 0;
}
static int db_gethook (lua_State *L) {
int arg;
lua_State *L1 = getthread(L, &arg);
char buff[5];
int mask = lua_gethookmask(L1);
lua_Hook hook = lua_gethook(L1);
if (hook == NULL) { /* no hook? */
luaL_pushfail(L);
return 1;
}
else if (hook != hookf) /* external hook? */
lua_pushliteral(L, "external hook");
else { /* hook table must exist */
lua_getfield(L, LUA_REGISTRYINDEX, HOOKKEY);
checkstack(L, L1, 1);
lua_pushthread(L1); lua_xmove(L1, L, 1);
lua_rawget(L, -2); /* 1st result = hooktable[L1] */
lua_remove(L, -2); /* remove hook table */
}
lua_pushstring(L, unmakemask(mask, buff)); /* 2nd result = mask */
lua_pushinteger(L, lua_gethookcount(L1)); /* 3rd result = count */
return 3;
}
static int db_debug (lua_State *L) {
for (;;) {
char buffer[250];
lua_writestringerror("%s", "lua_debug> ");
if (fgets(buffer, sizeof(buffer), stdin) == NULL ||
strcmp(buffer, "cont\n") == 0)
return 0;
if (luaL_loadbuffer(L, buffer, strlen(buffer), "=(debug command)") ||
lua_pcall(L, 0, 0, 0))
lua_writestringerror("%s\n", luaL_tolstring(L, -1, NULL));
lua_settop(L, 0); /* remove eventual returns */
}
}
static int db_traceback (lua_State *L) {
int arg;
lua_State *L1 = getthread(L, &arg);
const char *msg = lua_tostring(L, arg + 1);
if (msg == NULL && !lua_isnoneornil(L, arg + 1)) /* non-string 'msg'? */
lua_pushvalue(L, arg + 1); /* return it untouched */
else {
int level = (int)luaL_optinteger(L, arg + 2, (L == L1) ? 1 : 0);
luaL_traceback(L, L1, msg, level);
}
return 1;
}
static int db_setcstacklimit (lua_State *L) {
int limit = (int)luaL_checkinteger(L, 1);
int res = lua_setcstacklimit(L, limit);
lua_pushinteger(L, res);
return 1;
}
static const luaL_Reg dblib[] = {
{"debug", db_debug},
{"getuservalue", db_getuservalue},
{"gethook", db_gethook},
{"getinfo", db_getinfo},
{"getlocal", db_getlocal},
{"getregistry", db_getregistry},
{"getmetatable", db_getmetatable},
{"getupvalue", db_getupvalue},
{"upvaluejoin", db_upvaluejoin},
{"upvalueid", db_upvalueid},
{"setuservalue", db_setuservalue},
{"sethook", db_sethook},
{"setlocal", db_setlocal},
{"setmetatable", db_setmetatable},
{"setupvalue", db_setupvalue},
{"traceback", db_traceback},
{"setcstacklimit", db_setcstacklimit},
{NULL, NULL}
};
LUAMOD_API int luaopen_debug (lua_State *L) {
luaL_newlib(L, dblib);
return 1;
}

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lua-5.4.7/src/ldebug.c Normal file
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@ -0,0 +1,962 @@
/*
** $Id: ldebug.c $
** Debug Interface
** See Copyright Notice in lua.h
*/
#define ldebug_c
#define LUA_CORE
#include "lprefix.h"
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include "lua.h"
#include "lapi.h"
#include "lcode.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lobject.h"
#include "lopcodes.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
#include "lvm.h"
#define LuaClosure(f) ((f) != NULL && (f)->c.tt == LUA_VLCL)
static const char *funcnamefromcall (lua_State *L, CallInfo *ci,
const char **name);
static int currentpc (CallInfo *ci) {
lua_assert(isLua(ci));
return pcRel(ci->u.l.savedpc, ci_func(ci)->p);
}
/*
** Get a "base line" to find the line corresponding to an instruction.
** Base lines are regularly placed at MAXIWTHABS intervals, so usually
** an integer division gets the right place. When the source file has
** large sequences of empty/comment lines, it may need extra entries,
** so the original estimate needs a correction.
** If the original estimate is -1, the initial 'if' ensures that the
** 'while' will run at least once.
** The assertion that the estimate is a lower bound for the correct base
** is valid as long as the debug info has been generated with the same
** value for MAXIWTHABS or smaller. (Previous releases use a little
** smaller value.)
*/
static int getbaseline (const Proto *f, int pc, int *basepc) {
if (f->sizeabslineinfo == 0 || pc < f->abslineinfo[0].pc) {
*basepc = -1; /* start from the beginning */
return f->linedefined;
}
else {
int i = cast_uint(pc) / MAXIWTHABS - 1; /* get an estimate */
/* estimate must be a lower bound of the correct base */
lua_assert(i < 0 ||
(i < f->sizeabslineinfo && f->abslineinfo[i].pc <= pc));
while (i + 1 < f->sizeabslineinfo && pc >= f->abslineinfo[i + 1].pc)
i++; /* low estimate; adjust it */
*basepc = f->abslineinfo[i].pc;
return f->abslineinfo[i].line;
}
}
/*
** Get the line corresponding to instruction 'pc' in function 'f';
** first gets a base line and from there does the increments until
** the desired instruction.
*/
int luaG_getfuncline (const Proto *f, int pc) {
if (f->lineinfo == NULL) /* no debug information? */
return -1;
else {
int basepc;
int baseline = getbaseline(f, pc, &basepc);
while (basepc++ < pc) { /* walk until given instruction */
lua_assert(f->lineinfo[basepc] != ABSLINEINFO);
baseline += f->lineinfo[basepc]; /* correct line */
}
return baseline;
}
}
static int getcurrentline (CallInfo *ci) {
return luaG_getfuncline(ci_func(ci)->p, currentpc(ci));
}
/*
** Set 'trap' for all active Lua frames.
** This function can be called during a signal, under "reasonable"
** assumptions. A new 'ci' is completely linked in the list before it
** becomes part of the "active" list, and we assume that pointers are
** atomic; see comment in next function.
** (A compiler doing interprocedural optimizations could, theoretically,
** reorder memory writes in such a way that the list could be
** temporarily broken while inserting a new element. We simply assume it
** has no good reasons to do that.)
*/
static void settraps (CallInfo *ci) {
for (; ci != NULL; ci = ci->previous)
if (isLua(ci))
ci->u.l.trap = 1;
}
/*
** This function can be called during a signal, under "reasonable"
** assumptions.
** Fields 'basehookcount' and 'hookcount' (set by 'resethookcount')
** are for debug only, and it is no problem if they get arbitrary
** values (causes at most one wrong hook call). 'hookmask' is an atomic
** value. We assume that pointers are atomic too (e.g., gcc ensures that
** for all platforms where it runs). Moreover, 'hook' is always checked
** before being called (see 'luaD_hook').
*/
LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
if (func == NULL || mask == 0) { /* turn off hooks? */
mask = 0;
func = NULL;
}
L->hook = func;
L->basehookcount = count;
resethookcount(L);
L->hookmask = cast_byte(mask);
if (mask)
settraps(L->ci); /* to trace inside 'luaV_execute' */
}
LUA_API lua_Hook lua_gethook (lua_State *L) {
return L->hook;
}
LUA_API int lua_gethookmask (lua_State *L) {
return L->hookmask;
}
LUA_API int lua_gethookcount (lua_State *L) {
return L->basehookcount;
}
LUA_API int lua_getstack (lua_State *L, int level, lua_Debug *ar) {
int status;
CallInfo *ci;
if (level < 0) return 0; /* invalid (negative) level */
lua_lock(L);
for (ci = L->ci; level > 0 && ci != &L->base_ci; ci = ci->previous)
level--;
if (level == 0 && ci != &L->base_ci) { /* level found? */
status = 1;
ar->i_ci = ci;
}
else status = 0; /* no such level */
lua_unlock(L);
return status;
}
static const char *upvalname (const Proto *p, int uv) {
TString *s = check_exp(uv < p->sizeupvalues, p->upvalues[uv].name);
if (s == NULL) return "?";
else return getstr(s);
}
static const char *findvararg (CallInfo *ci, int n, StkId *pos) {
if (clLvalue(s2v(ci->func.p))->p->is_vararg) {
int nextra = ci->u.l.nextraargs;
if (n >= -nextra) { /* 'n' is negative */
*pos = ci->func.p - nextra - (n + 1);
return "(vararg)"; /* generic name for any vararg */
}
}
return NULL; /* no such vararg */
}
const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n, StkId *pos) {
StkId base = ci->func.p + 1;
const char *name = NULL;
if (isLua(ci)) {
if (n < 0) /* access to vararg values? */
return findvararg(ci, n, pos);
else
name = luaF_getlocalname(ci_func(ci)->p, n, currentpc(ci));
}
if (name == NULL) { /* no 'standard' name? */
StkId limit = (ci == L->ci) ? L->top.p : ci->next->func.p;
if (limit - base >= n && n > 0) { /* is 'n' inside 'ci' stack? */
/* generic name for any valid slot */
name = isLua(ci) ? "(temporary)" : "(C temporary)";
}
else
return NULL; /* no name */
}
if (pos)
*pos = base + (n - 1);
return name;
}
LUA_API const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n) {
const char *name;
lua_lock(L);
if (ar == NULL) { /* information about non-active function? */
if (!isLfunction(s2v(L->top.p - 1))) /* not a Lua function? */
name = NULL;
else /* consider live variables at function start (parameters) */
name = luaF_getlocalname(clLvalue(s2v(L->top.p - 1))->p, n, 0);
}
else { /* active function; get information through 'ar' */
StkId pos = NULL; /* to avoid warnings */
name = luaG_findlocal(L, ar->i_ci, n, &pos);
if (name) {
setobjs2s(L, L->top.p, pos);
api_incr_top(L);
}
}
lua_unlock(L);
return name;
}
LUA_API const char *lua_setlocal (lua_State *L, const lua_Debug *ar, int n) {
StkId pos = NULL; /* to avoid warnings */
const char *name;
lua_lock(L);
name = luaG_findlocal(L, ar->i_ci, n, &pos);
if (name) {
setobjs2s(L, pos, L->top.p - 1);
L->top.p--; /* pop value */
}
lua_unlock(L);
return name;
}
static void funcinfo (lua_Debug *ar, Closure *cl) {
if (!LuaClosure(cl)) {
ar->source = "=[C]";
ar->srclen = LL("=[C]");
ar->linedefined = -1;
ar->lastlinedefined = -1;
ar->what = "C";
}
else {
const Proto *p = cl->l.p;
if (p->source) {
ar->source = getstr(p->source);
ar->srclen = tsslen(p->source);
}
else {
ar->source = "=?";
ar->srclen = LL("=?");
}
ar->linedefined = p->linedefined;
ar->lastlinedefined = p->lastlinedefined;
ar->what = (ar->linedefined == 0) ? "main" : "Lua";
}
luaO_chunkid(ar->short_src, ar->source, ar->srclen);
}
static int nextline (const Proto *p, int currentline, int pc) {
if (p->lineinfo[pc] != ABSLINEINFO)
return currentline + p->lineinfo[pc];
else
return luaG_getfuncline(p, pc);
}
static void collectvalidlines (lua_State *L, Closure *f) {
if (!LuaClosure(f)) {
setnilvalue(s2v(L->top.p));
api_incr_top(L);
}
else {
const Proto *p = f->l.p;
int currentline = p->linedefined;
Table *t = luaH_new(L); /* new table to store active lines */
sethvalue2s(L, L->top.p, t); /* push it on stack */
api_incr_top(L);
if (p->lineinfo != NULL) { /* proto with debug information? */
int i;
TValue v;
setbtvalue(&v); /* boolean 'true' to be the value of all indices */
if (!p->is_vararg) /* regular function? */
i = 0; /* consider all instructions */
else { /* vararg function */
lua_assert(GET_OPCODE(p->code[0]) == OP_VARARGPREP);
currentline = nextline(p, currentline, 0);
i = 1; /* skip first instruction (OP_VARARGPREP) */
}
for (; i < p->sizelineinfo; i++) { /* for each instruction */
currentline = nextline(p, currentline, i); /* get its line */
luaH_setint(L, t, currentline, &v); /* table[line] = true */
}
}
}
}
static const char *getfuncname (lua_State *L, CallInfo *ci, const char **name) {
/* calling function is a known function? */
if (ci != NULL && !(ci->callstatus & CIST_TAIL))
return funcnamefromcall(L, ci->previous, name);
else return NULL; /* no way to find a name */
}
static int auxgetinfo (lua_State *L, const char *what, lua_Debug *ar,
Closure *f, CallInfo *ci) {
int status = 1;
for (; *what; what++) {
switch (*what) {
case 'S': {
funcinfo(ar, f);
break;
}
case 'l': {
ar->currentline = (ci && isLua(ci)) ? getcurrentline(ci) : -1;
break;
}
case 'u': {
ar->nups = (f == NULL) ? 0 : f->c.nupvalues;
if (!LuaClosure(f)) {
ar->isvararg = 1;
ar->nparams = 0;
}
else {
ar->isvararg = f->l.p->is_vararg;
ar->nparams = f->l.p->numparams;
}
break;
}
case 't': {
ar->istailcall = (ci) ? ci->callstatus & CIST_TAIL : 0;
break;
}
case 'n': {
ar->namewhat = getfuncname(L, ci, &ar->name);
if (ar->namewhat == NULL) {
ar->namewhat = ""; /* not found */
ar->name = NULL;
}
break;
}
case 'r': {
if (ci == NULL || !(ci->callstatus & CIST_TRAN))
ar->ftransfer = ar->ntransfer = 0;
else {
ar->ftransfer = ci->u2.transferinfo.ftransfer;
ar->ntransfer = ci->u2.transferinfo.ntransfer;
}
break;
}
case 'L':
case 'f': /* handled by lua_getinfo */
break;
default: status = 0; /* invalid option */
}
}
return status;
}
LUA_API int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar) {
int status;
Closure *cl;
CallInfo *ci;
TValue *func;
lua_lock(L);
if (*what == '>') {
ci = NULL;
func = s2v(L->top.p - 1);
api_check(L, ttisfunction(func), "function expected");
what++; /* skip the '>' */
L->top.p--; /* pop function */
}
else {
ci = ar->i_ci;
func = s2v(ci->func.p);
lua_assert(ttisfunction(func));
}
cl = ttisclosure(func) ? clvalue(func) : NULL;
status = auxgetinfo(L, what, ar, cl, ci);
if (strchr(what, 'f')) {
setobj2s(L, L->top.p, func);
api_incr_top(L);
}
if (strchr(what, 'L'))
collectvalidlines(L, cl);
lua_unlock(L);
return status;
}
/*
** {======================================================
** Symbolic Execution
** =======================================================
*/
static int filterpc (int pc, int jmptarget) {
if (pc < jmptarget) /* is code conditional (inside a jump)? */
return -1; /* cannot know who sets that register */
else return pc; /* current position sets that register */
}
/*
** Try to find last instruction before 'lastpc' that modified register 'reg'.
*/
static int findsetreg (const Proto *p, int lastpc, int reg) {
int pc;
int setreg = -1; /* keep last instruction that changed 'reg' */
int jmptarget = 0; /* any code before this address is conditional */
if (testMMMode(GET_OPCODE(p->code[lastpc])))
lastpc--; /* previous instruction was not actually executed */
for (pc = 0; pc < lastpc; pc++) {
Instruction i = p->code[pc];
OpCode op = GET_OPCODE(i);
int a = GETARG_A(i);
int change; /* true if current instruction changed 'reg' */
switch (op) {
case OP_LOADNIL: { /* set registers from 'a' to 'a+b' */
int b = GETARG_B(i);
change = (a <= reg && reg <= a + b);
break;
}
case OP_TFORCALL: { /* affect all regs above its base */
change = (reg >= a + 2);
break;
}
case OP_CALL:
case OP_TAILCALL: { /* affect all registers above base */
change = (reg >= a);
break;
}
case OP_JMP: { /* doesn't change registers, but changes 'jmptarget' */
int b = GETARG_sJ(i);
int dest = pc + 1 + b;
/* jump does not skip 'lastpc' and is larger than current one? */
if (dest <= lastpc && dest > jmptarget)
jmptarget = dest; /* update 'jmptarget' */
change = 0;
break;
}
default: /* any instruction that sets A */
change = (testAMode(op) && reg == a);
break;
}
if (change)
setreg = filterpc(pc, jmptarget);
}
return setreg;
}
/*
** Find a "name" for the constant 'c'.
*/
static const char *kname (const Proto *p, int index, const char **name) {
TValue *kvalue = &p->k[index];
if (ttisstring(kvalue)) {
*name = getstr(tsvalue(kvalue));
return "constant";
}
else {
*name = "?";
return NULL;
}
}
static const char *basicgetobjname (const Proto *p, int *ppc, int reg,
const char **name) {
int pc = *ppc;
*name = luaF_getlocalname(p, reg + 1, pc);
if (*name) /* is a local? */
return "local";
/* else try symbolic execution */
*ppc = pc = findsetreg(p, pc, reg);
if (pc != -1) { /* could find instruction? */
Instruction i = p->code[pc];
OpCode op = GET_OPCODE(i);
switch (op) {
case OP_MOVE: {
int b = GETARG_B(i); /* move from 'b' to 'a' */
if (b < GETARG_A(i))
return basicgetobjname(p, ppc, b, name); /* get name for 'b' */
break;
}
case OP_GETUPVAL: {
*name = upvalname(p, GETARG_B(i));
return "upvalue";
}
case OP_LOADK: return kname(p, GETARG_Bx(i), name);
case OP_LOADKX: return kname(p, GETARG_Ax(p->code[pc + 1]), name);
default: break;
}
}
return NULL; /* could not find reasonable name */
}
/*
** Find a "name" for the register 'c'.
*/
static void rname (const Proto *p, int pc, int c, const char **name) {
const char *what = basicgetobjname(p, &pc, c, name); /* search for 'c' */
if (!(what && *what == 'c')) /* did not find a constant name? */
*name = "?";
}
/*
** Find a "name" for a 'C' value in an RK instruction.
*/
static void rkname (const Proto *p, int pc, Instruction i, const char **name) {
int c = GETARG_C(i); /* key index */
if (GETARG_k(i)) /* is 'c' a constant? */
kname(p, c, name);
else /* 'c' is a register */
rname(p, pc, c, name);
}
/*
** Check whether table being indexed by instruction 'i' is the
** environment '_ENV'
*/
static const char *isEnv (const Proto *p, int pc, Instruction i, int isup) {
int t = GETARG_B(i); /* table index */
const char *name; /* name of indexed variable */
if (isup) /* is 't' an upvalue? */
name = upvalname(p, t);
else /* 't' is a register */
basicgetobjname(p, &pc, t, &name);
return (name && strcmp(name, LUA_ENV) == 0) ? "global" : "field";
}
/*
** Extend 'basicgetobjname' to handle table accesses
*/
static const char *getobjname (const Proto *p, int lastpc, int reg,
const char **name) {
const char *kind = basicgetobjname(p, &lastpc, reg, name);
if (kind != NULL)
return kind;
else if (lastpc != -1) { /* could find instruction? */
Instruction i = p->code[lastpc];
OpCode op = GET_OPCODE(i);
switch (op) {
case OP_GETTABUP: {
int k = GETARG_C(i); /* key index */
kname(p, k, name);
return isEnv(p, lastpc, i, 1);
}
case OP_GETTABLE: {
int k = GETARG_C(i); /* key index */
rname(p, lastpc, k, name);
return isEnv(p, lastpc, i, 0);
}
case OP_GETI: {
*name = "integer index";
return "field";
}
case OP_GETFIELD: {
int k = GETARG_C(i); /* key index */
kname(p, k, name);
return isEnv(p, lastpc, i, 0);
}
case OP_SELF: {
rkname(p, lastpc, i, name);
return "method";
}
default: break; /* go through to return NULL */
}
}
return NULL; /* could not find reasonable name */
}
/*
** Try to find a name for a function based on the code that called it.
** (Only works when function was called by a Lua function.)
** Returns what the name is (e.g., "for iterator", "method",
** "metamethod") and sets '*name' to point to the name.
*/
static const char *funcnamefromcode (lua_State *L, const Proto *p,
int pc, const char **name) {
TMS tm = (TMS)0; /* (initial value avoids warnings) */
Instruction i = p->code[pc]; /* calling instruction */
switch (GET_OPCODE(i)) {
case OP_CALL:
case OP_TAILCALL:
return getobjname(p, pc, GETARG_A(i), name); /* get function name */
case OP_TFORCALL: { /* for iterator */
*name = "for iterator";
return "for iterator";
}
/* other instructions can do calls through metamethods */
case OP_SELF: case OP_GETTABUP: case OP_GETTABLE:
case OP_GETI: case OP_GETFIELD:
tm = TM_INDEX;
break;
case OP_SETTABUP: case OP_SETTABLE: case OP_SETI: case OP_SETFIELD:
tm = TM_NEWINDEX;
break;
case OP_MMBIN: case OP_MMBINI: case OP_MMBINK: {
tm = cast(TMS, GETARG_C(i));
break;
}
case OP_UNM: tm = TM_UNM; break;
case OP_BNOT: tm = TM_BNOT; break;
case OP_LEN: tm = TM_LEN; break;
case OP_CONCAT: tm = TM_CONCAT; break;
case OP_EQ: tm = TM_EQ; break;
/* no cases for OP_EQI and OP_EQK, as they don't call metamethods */
case OP_LT: case OP_LTI: case OP_GTI: tm = TM_LT; break;
case OP_LE: case OP_LEI: case OP_GEI: tm = TM_LE; break;
case OP_CLOSE: case OP_RETURN: tm = TM_CLOSE; break;
default:
return NULL; /* cannot find a reasonable name */
}
*name = getshrstr(G(L)->tmname[tm]) + 2;
return "metamethod";
}
/*
** Try to find a name for a function based on how it was called.
*/
static const char *funcnamefromcall (lua_State *L, CallInfo *ci,
const char **name) {
if (ci->callstatus & CIST_HOOKED) { /* was it called inside a hook? */
*name = "?";
return "hook";
}
else if (ci->callstatus & CIST_FIN) { /* was it called as a finalizer? */
*name = "__gc";
return "metamethod"; /* report it as such */
}
else if (isLua(ci))
return funcnamefromcode(L, ci_func(ci)->p, currentpc(ci), name);
else
return NULL;
}
/* }====================================================== */
/*
** Check whether pointer 'o' points to some value in the stack frame of
** the current function and, if so, returns its index. Because 'o' may
** not point to a value in this stack, we cannot compare it with the
** region boundaries (undefined behavior in ISO C).
*/
static int instack (CallInfo *ci, const TValue *o) {
int pos;
StkId base = ci->func.p + 1;
for (pos = 0; base + pos < ci->top.p; pos++) {
if (o == s2v(base + pos))
return pos;
}
return -1; /* not found */
}
/*
** Checks whether value 'o' came from an upvalue. (That can only happen
** with instructions OP_GETTABUP/OP_SETTABUP, which operate directly on
** upvalues.)
*/
static const char *getupvalname (CallInfo *ci, const TValue *o,
const char **name) {
LClosure *c = ci_func(ci);
int i;
for (i = 0; i < c->nupvalues; i++) {
if (c->upvals[i]->v.p == o) {
*name = upvalname(c->p, i);
return "upvalue";
}
}
return NULL;
}
static const char *formatvarinfo (lua_State *L, const char *kind,
const char *name) {
if (kind == NULL)
return ""; /* no information */
else
return luaO_pushfstring(L, " (%s '%s')", kind, name);
}
/*
** Build a string with a "description" for the value 'o', such as
** "variable 'x'" or "upvalue 'y'".
*/
static const char *varinfo (lua_State *L, const TValue *o) {
CallInfo *ci = L->ci;
const char *name = NULL; /* to avoid warnings */
const char *kind = NULL;
if (isLua(ci)) {
kind = getupvalname(ci, o, &name); /* check whether 'o' is an upvalue */
if (!kind) { /* not an upvalue? */
int reg = instack(ci, o); /* try a register */
if (reg >= 0) /* is 'o' a register? */
kind = getobjname(ci_func(ci)->p, currentpc(ci), reg, &name);
}
}
return formatvarinfo(L, kind, name);
}
/*
** Raise a type error
*/
static l_noret typeerror (lua_State *L, const TValue *o, const char *op,
const char *extra) {
const char *t = luaT_objtypename(L, o);
luaG_runerror(L, "attempt to %s a %s value%s", op, t, extra);
}
/*
** Raise a type error with "standard" information about the faulty
** object 'o' (using 'varinfo').
*/
l_noret luaG_typeerror (lua_State *L, const TValue *o, const char *op) {
typeerror(L, o, op, varinfo(L, o));
}
/*
** Raise an error for calling a non-callable object. Try to find a name
** for the object based on how it was called ('funcnamefromcall'); if it
** cannot get a name there, try 'varinfo'.
*/
l_noret luaG_callerror (lua_State *L, const TValue *o) {
CallInfo *ci = L->ci;
const char *name = NULL; /* to avoid warnings */
const char *kind = funcnamefromcall(L, ci, &name);
const char *extra = kind ? formatvarinfo(L, kind, name) : varinfo(L, o);
typeerror(L, o, "call", extra);
}
l_noret luaG_forerror (lua_State *L, const TValue *o, const char *what) {
luaG_runerror(L, "bad 'for' %s (number expected, got %s)",
what, luaT_objtypename(L, o));
}
l_noret luaG_concaterror (lua_State *L, const TValue *p1, const TValue *p2) {
if (ttisstring(p1) || cvt2str(p1)) p1 = p2;
luaG_typeerror(L, p1, "concatenate");
}
l_noret luaG_opinterror (lua_State *L, const TValue *p1,
const TValue *p2, const char *msg) {
if (!ttisnumber(p1)) /* first operand is wrong? */
p2 = p1; /* now second is wrong */
luaG_typeerror(L, p2, msg);
}
/*
** Error when both values are convertible to numbers, but not to integers
*/
l_noret luaG_tointerror (lua_State *L, const TValue *p1, const TValue *p2) {
lua_Integer temp;
if (!luaV_tointegerns(p1, &temp, LUA_FLOORN2I))
p2 = p1;
luaG_runerror(L, "number%s has no integer representation", varinfo(L, p2));
}
l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
const char *t1 = luaT_objtypename(L, p1);
const char *t2 = luaT_objtypename(L, p2);
if (strcmp(t1, t2) == 0)
luaG_runerror(L, "attempt to compare two %s values", t1);
else
luaG_runerror(L, "attempt to compare %s with %s", t1, t2);
}
/* add src:line information to 'msg' */
const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
int line) {
char buff[LUA_IDSIZE];
if (src)
luaO_chunkid(buff, getstr(src), tsslen(src));
else { /* no source available; use "?" instead */
buff[0] = '?'; buff[1] = '\0';
}
return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
}
l_noret luaG_errormsg (lua_State *L) {
if (L->errfunc != 0) { /* is there an error handling function? */
StkId errfunc = restorestack(L, L->errfunc);
lua_assert(ttisfunction(s2v(errfunc)));
setobjs2s(L, L->top.p, L->top.p - 1); /* move argument */
setobjs2s(L, L->top.p - 1, errfunc); /* push function */
L->top.p++; /* assume EXTRA_STACK */
luaD_callnoyield(L, L->top.p - 2, 1); /* call it */
}
luaD_throw(L, LUA_ERRRUN);
}
l_noret luaG_runerror (lua_State *L, const char *fmt, ...) {
CallInfo *ci = L->ci;
const char *msg;
va_list argp;
luaC_checkGC(L); /* error message uses memory */
va_start(argp, fmt);
msg = luaO_pushvfstring(L, fmt, argp); /* format message */
va_end(argp);
if (isLua(ci)) { /* if Lua function, add source:line information */
luaG_addinfo(L, msg, ci_func(ci)->p->source, getcurrentline(ci));
setobjs2s(L, L->top.p - 2, L->top.p - 1); /* remove 'msg' */
L->top.p--;
}
luaG_errormsg(L);
}
/*
** Check whether new instruction 'newpc' is in a different line from
** previous instruction 'oldpc'. More often than not, 'newpc' is only
** one or a few instructions after 'oldpc' (it must be after, see
** caller), so try to avoid calling 'luaG_getfuncline'. If they are
** too far apart, there is a good chance of a ABSLINEINFO in the way,
** so it goes directly to 'luaG_getfuncline'.
*/
static int changedline (const Proto *p, int oldpc, int newpc) {
if (p->lineinfo == NULL) /* no debug information? */
return 0;
if (newpc - oldpc < MAXIWTHABS / 2) { /* not too far apart? */
int delta = 0; /* line difference */
int pc = oldpc;
for (;;) {
int lineinfo = p->lineinfo[++pc];
if (lineinfo == ABSLINEINFO)
break; /* cannot compute delta; fall through */
delta += lineinfo;
if (pc == newpc)
return (delta != 0); /* delta computed successfully */
}
}
/* either instructions are too far apart or there is an absolute line
info in the way; compute line difference explicitly */
return (luaG_getfuncline(p, oldpc) != luaG_getfuncline(p, newpc));
}
/*
** Traces Lua calls. If code is running the first instruction of a function,
** and function is not vararg, and it is not coming from an yield,
** calls 'luaD_hookcall'. (Vararg functions will call 'luaD_hookcall'
** after adjusting its variable arguments; otherwise, they could call
** a line/count hook before the call hook. Functions coming from
** an yield already called 'luaD_hookcall' before yielding.)
*/
int luaG_tracecall (lua_State *L) {
CallInfo *ci = L->ci;
Proto *p = ci_func(ci)->p;
ci->u.l.trap = 1; /* ensure hooks will be checked */
if (ci->u.l.savedpc == p->code) { /* first instruction (not resuming)? */
if (p->is_vararg)
return 0; /* hooks will start at VARARGPREP instruction */
else if (!(ci->callstatus & CIST_HOOKYIELD)) /* not yieded? */
luaD_hookcall(L, ci); /* check 'call' hook */
}
return 1; /* keep 'trap' on */
}
/*
** Traces the execution of a Lua function. Called before the execution
** of each opcode, when debug is on. 'L->oldpc' stores the last
** instruction traced, to detect line changes. When entering a new
** function, 'npci' will be zero and will test as a new line whatever
** the value of 'oldpc'. Some exceptional conditions may return to
** a function without setting 'oldpc'. In that case, 'oldpc' may be
** invalid; if so, use zero as a valid value. (A wrong but valid 'oldpc'
** at most causes an extra call to a line hook.)
** This function is not "Protected" when called, so it should correct
** 'L->top.p' before calling anything that can run the GC.
*/
int luaG_traceexec (lua_State *L, const Instruction *pc) {
CallInfo *ci = L->ci;
lu_byte mask = L->hookmask;
const Proto *p = ci_func(ci)->p;
int counthook;
if (!(mask & (LUA_MASKLINE | LUA_MASKCOUNT))) { /* no hooks? */
ci->u.l.trap = 0; /* don't need to stop again */
return 0; /* turn off 'trap' */
}
pc++; /* reference is always next instruction */
ci->u.l.savedpc = pc; /* save 'pc' */
counthook = (mask & LUA_MASKCOUNT) && (--L->hookcount == 0);
if (counthook)
resethookcount(L); /* reset count */
else if (!(mask & LUA_MASKLINE))
return 1; /* no line hook and count != 0; nothing to be done now */
if (ci->callstatus & CIST_HOOKYIELD) { /* hook yielded last time? */
ci->callstatus &= ~CIST_HOOKYIELD; /* erase mark */
return 1; /* do not call hook again (VM yielded, so it did not move) */
}
if (!isIT(*(ci->u.l.savedpc - 1))) /* top not being used? */
L->top.p = ci->top.p; /* correct top */
if (counthook)
luaD_hook(L, LUA_HOOKCOUNT, -1, 0, 0); /* call count hook */
if (mask & LUA_MASKLINE) {
/* 'L->oldpc' may be invalid; use zero in this case */
int oldpc = (L->oldpc < p->sizecode) ? L->oldpc : 0;
int npci = pcRel(pc, p);
if (npci <= oldpc || /* call hook when jump back (loop), */
changedline(p, oldpc, npci)) { /* or when enter new line */
int newline = luaG_getfuncline(p, npci);
luaD_hook(L, LUA_HOOKLINE, newline, 0, 0); /* call line hook */
}
L->oldpc = npci; /* 'pc' of last call to line hook */
}
if (L->status == LUA_YIELD) { /* did hook yield? */
if (counthook)
L->hookcount = 1; /* undo decrement to zero */
ci->callstatus |= CIST_HOOKYIELD; /* mark that it yielded */
luaD_throw(L, LUA_YIELD);
}
return 1; /* keep 'trap' on */
}

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lua-5.4.7/src/ldebug.h Normal file
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/*
** $Id: ldebug.h $
** Auxiliary functions from Debug Interface module
** See Copyright Notice in lua.h
*/
#ifndef ldebug_h
#define ldebug_h
#include "lstate.h"
#define pcRel(pc, p) (cast_int((pc) - (p)->code) - 1)
/* Active Lua function (given call info) */
#define ci_func(ci) (clLvalue(s2v((ci)->func.p)))
#define resethookcount(L) (L->hookcount = L->basehookcount)
/*
** mark for entries in 'lineinfo' array that has absolute information in
** 'abslineinfo' array
*/
#define ABSLINEINFO (-0x80)
/*
** MAXimum number of successive Instructions WiTHout ABSolute line
** information. (A power of two allows fast divisions.)
*/
#if !defined(MAXIWTHABS)
#define MAXIWTHABS 128
#endif
LUAI_FUNC int luaG_getfuncline (const Proto *f, int pc);
LUAI_FUNC const char *luaG_findlocal (lua_State *L, CallInfo *ci, int n,
StkId *pos);
LUAI_FUNC l_noret luaG_typeerror (lua_State *L, const TValue *o,
const char *opname);
LUAI_FUNC l_noret luaG_callerror (lua_State *L, const TValue *o);
LUAI_FUNC l_noret luaG_forerror (lua_State *L, const TValue *o,
const char *what);
LUAI_FUNC l_noret luaG_concaterror (lua_State *L, const TValue *p1,
const TValue *p2);
LUAI_FUNC l_noret luaG_opinterror (lua_State *L, const TValue *p1,
const TValue *p2,
const char *msg);
LUAI_FUNC l_noret luaG_tointerror (lua_State *L, const TValue *p1,
const TValue *p2);
LUAI_FUNC l_noret luaG_ordererror (lua_State *L, const TValue *p1,
const TValue *p2);
LUAI_FUNC l_noret luaG_runerror (lua_State *L, const char *fmt, ...);
LUAI_FUNC const char *luaG_addinfo (lua_State *L, const char *msg,
TString *src, int line);
LUAI_FUNC l_noret luaG_errormsg (lua_State *L);
LUAI_FUNC int luaG_traceexec (lua_State *L, const Instruction *pc);
LUAI_FUNC int luaG_tracecall (lua_State *L);
#endif

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/*
** $Id: ldo.h $
** Stack and Call structure of Lua
** See Copyright Notice in lua.h
*/
#ifndef ldo_h
#define ldo_h
#include "llimits.h"
#include "lobject.h"
#include "lstate.h"
#include "lzio.h"
/*
** Macro to check stack size and grow stack if needed. Parameters
** 'pre'/'pos' allow the macro to preserve a pointer into the
** stack across reallocations, doing the work only when needed.
** It also allows the running of one GC step when the stack is
** reallocated.
** 'condmovestack' is used in heavy tests to force a stack reallocation
** at every check.
*/
#define luaD_checkstackaux(L,n,pre,pos) \
if (l_unlikely(L->stack_last.p - L->top.p <= (n))) \
{ pre; luaD_growstack(L, n, 1); pos; } \
else { condmovestack(L,pre,pos); }
/* In general, 'pre'/'pos' are empty (nothing to save) */
#define luaD_checkstack(L,n) luaD_checkstackaux(L,n,(void)0,(void)0)
#define savestack(L,pt) (cast_charp(pt) - cast_charp(L->stack.p))
#define restorestack(L,n) cast(StkId, cast_charp(L->stack.p) + (n))
/* macro to check stack size, preserving 'p' */
#define checkstackp(L,n,p) \
luaD_checkstackaux(L, n, \
ptrdiff_t t__ = savestack(L, p), /* save 'p' */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/* macro to check stack size and GC, preserving 'p' */
#define checkstackGCp(L,n,p) \
luaD_checkstackaux(L, n, \
ptrdiff_t t__ = savestack(L, p); /* save 'p' */ \
luaC_checkGC(L), /* stack grow uses memory */ \
p = restorestack(L, t__)) /* 'pos' part: restore 'p' */
/* macro to check stack size and GC */
#define checkstackGC(L,fsize) \
luaD_checkstackaux(L, (fsize), luaC_checkGC(L), (void)0)
/* type of protected functions, to be ran by 'runprotected' */
typedef void (*Pfunc) (lua_State *L, void *ud);
LUAI_FUNC void luaD_seterrorobj (lua_State *L, int errcode, StkId oldtop);
LUAI_FUNC int luaD_protectedparser (lua_State *L, ZIO *z, const char *name,
const char *mode);
LUAI_FUNC void luaD_hook (lua_State *L, int event, int line,
int fTransfer, int nTransfer);
LUAI_FUNC void luaD_hookcall (lua_State *L, CallInfo *ci);
LUAI_FUNC int luaD_pretailcall (lua_State *L, CallInfo *ci, StkId func,
int narg1, int delta);
LUAI_FUNC CallInfo *luaD_precall (lua_State *L, StkId func, int nResults);
LUAI_FUNC void luaD_call (lua_State *L, StkId func, int nResults);
LUAI_FUNC void luaD_callnoyield (lua_State *L, StkId func, int nResults);
LUAI_FUNC int luaD_closeprotected (lua_State *L, ptrdiff_t level, int status);
LUAI_FUNC int luaD_pcall (lua_State *L, Pfunc func, void *u,
ptrdiff_t oldtop, ptrdiff_t ef);
LUAI_FUNC void luaD_poscall (lua_State *L, CallInfo *ci, int nres);
LUAI_FUNC int luaD_reallocstack (lua_State *L, int newsize, int raiseerror);
LUAI_FUNC int luaD_growstack (lua_State *L, int n, int raiseerror);
LUAI_FUNC void luaD_shrinkstack (lua_State *L);
LUAI_FUNC void luaD_inctop (lua_State *L);
LUAI_FUNC l_noret luaD_throw (lua_State *L, int errcode);
LUAI_FUNC int luaD_rawrunprotected (lua_State *L, Pfunc f, void *ud);
#endif

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/*
** $Id: ldump.c $
** save precompiled Lua chunks
** See Copyright Notice in lua.h
*/
#define ldump_c
#define LUA_CORE
#include "lprefix.h"
#include <limits.h>
#include <stddef.h>
#include "lua.h"
#include "lobject.h"
#include "lstate.h"
#include "lundump.h"
typedef struct {
lua_State *L;
lua_Writer writer;
void *data;
int strip;
int status;
} DumpState;
/*
** All high-level dumps go through dumpVector; you can change it to
** change the endianness of the result
*/
#define dumpVector(D,v,n) dumpBlock(D,v,(n)*sizeof((v)[0]))
#define dumpLiteral(D, s) dumpBlock(D,s,sizeof(s) - sizeof(char))
static void dumpBlock (DumpState *D, const void *b, size_t size) {
if (D->status == 0 && size > 0) {
lua_unlock(D->L);
D->status = (*D->writer)(D->L, b, size, D->data);
lua_lock(D->L);
}
}
#define dumpVar(D,x) dumpVector(D,&x,1)
static void dumpByte (DumpState *D, int y) {
lu_byte x = (lu_byte)y;
dumpVar(D, x);
}
/*
** 'dumpSize' buffer size: each byte can store up to 7 bits. (The "+6"
** rounds up the division.)
*/
#define DIBS ((sizeof(size_t) * CHAR_BIT + 6) / 7)
static void dumpSize (DumpState *D, size_t x) {
lu_byte buff[DIBS];
int n = 0;
do {
buff[DIBS - (++n)] = x & 0x7f; /* fill buffer in reverse order */
x >>= 7;
} while (x != 0);
buff[DIBS - 1] |= 0x80; /* mark last byte */
dumpVector(D, buff + DIBS - n, n);
}
static void dumpInt (DumpState *D, int x) {
dumpSize(D, x);
}
static void dumpNumber (DumpState *D, lua_Number x) {
dumpVar(D, x);
}
static void dumpInteger (DumpState *D, lua_Integer x) {
dumpVar(D, x);
}
static void dumpString (DumpState *D, const TString *s) {
if (s == NULL)
dumpSize(D, 0);
else {
size_t size = tsslen(s);
const char *str = getstr(s);
dumpSize(D, size + 1);
dumpVector(D, str, size);
}
}
static void dumpCode (DumpState *D, const Proto *f) {
dumpInt(D, f->sizecode);
dumpVector(D, f->code, f->sizecode);
}
static void dumpFunction(DumpState *D, const Proto *f, TString *psource);
static void dumpConstants (DumpState *D, const Proto *f) {
int i;
int n = f->sizek;
dumpInt(D, n);
for (i = 0; i < n; i++) {
const TValue *o = &f->k[i];
int tt = ttypetag(o);
dumpByte(D, tt);
switch (tt) {
case LUA_VNUMFLT:
dumpNumber(D, fltvalue(o));
break;
case LUA_VNUMINT:
dumpInteger(D, ivalue(o));
break;
case LUA_VSHRSTR:
case LUA_VLNGSTR:
dumpString(D, tsvalue(o));
break;
default:
lua_assert(tt == LUA_VNIL || tt == LUA_VFALSE || tt == LUA_VTRUE);
}
}
}
static void dumpProtos (DumpState *D, const Proto *f) {
int i;
int n = f->sizep;
dumpInt(D, n);
for (i = 0; i < n; i++)
dumpFunction(D, f->p[i], f->source);
}
static void dumpUpvalues (DumpState *D, const Proto *f) {
int i, n = f->sizeupvalues;
dumpInt(D, n);
for (i = 0; i < n; i++) {
dumpByte(D, f->upvalues[i].instack);
dumpByte(D, f->upvalues[i].idx);
dumpByte(D, f->upvalues[i].kind);
}
}
static void dumpDebug (DumpState *D, const Proto *f) {
int i, n;
n = (D->strip) ? 0 : f->sizelineinfo;
dumpInt(D, n);
dumpVector(D, f->lineinfo, n);
n = (D->strip) ? 0 : f->sizeabslineinfo;
dumpInt(D, n);
for (i = 0; i < n; i++) {
dumpInt(D, f->abslineinfo[i].pc);
dumpInt(D, f->abslineinfo[i].line);
}
n = (D->strip) ? 0 : f->sizelocvars;
dumpInt(D, n);
for (i = 0; i < n; i++) {
dumpString(D, f->locvars[i].varname);
dumpInt(D, f->locvars[i].startpc);
dumpInt(D, f->locvars[i].endpc);
}
n = (D->strip) ? 0 : f->sizeupvalues;
dumpInt(D, n);
for (i = 0; i < n; i++)
dumpString(D, f->upvalues[i].name);
}
static void dumpFunction (DumpState *D, const Proto *f, TString *psource) {
if (D->strip || f->source == psource)
dumpString(D, NULL); /* no debug info or same source as its parent */
else
dumpString(D, f->source);
dumpInt(D, f->linedefined);
dumpInt(D, f->lastlinedefined);
dumpByte(D, f->numparams);
dumpByte(D, f->is_vararg);
dumpByte(D, f->maxstacksize);
dumpCode(D, f);
dumpConstants(D, f);
dumpUpvalues(D, f);
dumpProtos(D, f);
dumpDebug(D, f);
}
static void dumpHeader (DumpState *D) {
dumpLiteral(D, LUA_SIGNATURE);
dumpByte(D, LUAC_VERSION);
dumpByte(D, LUAC_FORMAT);
dumpLiteral(D, LUAC_DATA);
dumpByte(D, sizeof(Instruction));
dumpByte(D, sizeof(lua_Integer));
dumpByte(D, sizeof(lua_Number));
dumpInteger(D, LUAC_INT);
dumpNumber(D, LUAC_NUM);
}
/*
** dump Lua function as precompiled chunk
*/
int luaU_dump(lua_State *L, const Proto *f, lua_Writer w, void *data,
int strip) {
DumpState D;
D.L = L;
D.writer = w;
D.data = data;
D.strip = strip;
D.status = 0;
dumpHeader(&D);
dumpByte(&D, f->sizeupvalues);
dumpFunction(&D, f, NULL);
return D.status;
}

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/*
** $Id: lfunc.c $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
#define lfunc_c
#define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
CClosure *luaF_newCclosure (lua_State *L, int nupvals) {
GCObject *o = luaC_newobj(L, LUA_VCCL, sizeCclosure(nupvals));
CClosure *c = gco2ccl(o);
c->nupvalues = cast_byte(nupvals);
return c;
}
LClosure *luaF_newLclosure (lua_State *L, int nupvals) {
GCObject *o = luaC_newobj(L, LUA_VLCL, sizeLclosure(nupvals));
LClosure *c = gco2lcl(o);
c->p = NULL;
c->nupvalues = cast_byte(nupvals);
while (nupvals--) c->upvals[nupvals] = NULL;
return c;
}
/*
** fill a closure with new closed upvalues
*/
void luaF_initupvals (lua_State *L, LClosure *cl) {
int i;
for (i = 0; i < cl->nupvalues; i++) {
GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
UpVal *uv = gco2upv(o);
uv->v.p = &uv->u.value; /* make it closed */
setnilvalue(uv->v.p);
cl->upvals[i] = uv;
luaC_objbarrier(L, cl, uv);
}
}
/*
** Create a new upvalue at the given level, and link it to the list of
** open upvalues of 'L' after entry 'prev'.
**/
static UpVal *newupval (lua_State *L, StkId level, UpVal **prev) {
GCObject *o = luaC_newobj(L, LUA_VUPVAL, sizeof(UpVal));
UpVal *uv = gco2upv(o);
UpVal *next = *prev;
uv->v.p = s2v(level); /* current value lives in the stack */
uv->u.open.next = next; /* link it to list of open upvalues */
uv->u.open.previous = prev;
if (next)
next->u.open.previous = &uv->u.open.next;
*prev = uv;
if (!isintwups(L)) { /* thread not in list of threads with upvalues? */
L->twups = G(L)->twups; /* link it to the list */
G(L)->twups = L;
}
return uv;
}
/*
** Find and reuse, or create if it does not exist, an upvalue
** at the given level.
*/
UpVal *luaF_findupval (lua_State *L, StkId level) {
UpVal **pp = &L->openupval;
UpVal *p;
lua_assert(isintwups(L) || L->openupval == NULL);
while ((p = *pp) != NULL && uplevel(p) >= level) { /* search for it */
lua_assert(!isdead(G(L), p));
if (uplevel(p) == level) /* corresponding upvalue? */
return p; /* return it */
pp = &p->u.open.next;
}
/* not found: create a new upvalue after 'pp' */
return newupval(L, level, pp);
}
/*
** Call closing method for object 'obj' with error message 'err'. The
** boolean 'yy' controls whether the call is yieldable.
** (This function assumes EXTRA_STACK.)
*/
static void callclosemethod (lua_State *L, TValue *obj, TValue *err, int yy) {
StkId top = L->top.p;
const TValue *tm = luaT_gettmbyobj(L, obj, TM_CLOSE);
setobj2s(L, top, tm); /* will call metamethod... */
setobj2s(L, top + 1, obj); /* with 'self' as the 1st argument */
setobj2s(L, top + 2, err); /* and error msg. as 2nd argument */
L->top.p = top + 3; /* add function and arguments */
if (yy)
luaD_call(L, top, 0);
else
luaD_callnoyield(L, top, 0);
}
/*
** Check whether object at given level has a close metamethod and raise
** an error if not.
*/
static void checkclosemth (lua_State *L, StkId level) {
const TValue *tm = luaT_gettmbyobj(L, s2v(level), TM_CLOSE);
if (ttisnil(tm)) { /* no metamethod? */
int idx = cast_int(level - L->ci->func.p); /* variable index */
const char *vname = luaG_findlocal(L, L->ci, idx, NULL);
if (vname == NULL) vname = "?";
luaG_runerror(L, "variable '%s' got a non-closable value", vname);
}
}
/*
** Prepare and call a closing method.
** If status is CLOSEKTOP, the call to the closing method will be pushed
** at the top of the stack. Otherwise, values can be pushed right after
** the 'level' of the upvalue being closed, as everything after that
** won't be used again.
*/
static void prepcallclosemth (lua_State *L, StkId level, int status, int yy) {
TValue *uv = s2v(level); /* value being closed */
TValue *errobj;
if (status == CLOSEKTOP)
errobj = &G(L)->nilvalue; /* error object is nil */
else { /* 'luaD_seterrorobj' will set top to level + 2 */
errobj = s2v(level + 1); /* error object goes after 'uv' */
luaD_seterrorobj(L, status, level + 1); /* set error object */
}
callclosemethod(L, uv, errobj, yy);
}
/*
** Maximum value for deltas in 'tbclist', dependent on the type
** of delta. (This macro assumes that an 'L' is in scope where it
** is used.)
*/
#define MAXDELTA \
((256ul << ((sizeof(L->stack.p->tbclist.delta) - 1) * 8)) - 1)
/*
** Insert a variable in the list of to-be-closed variables.
*/
void luaF_newtbcupval (lua_State *L, StkId level) {
lua_assert(level > L->tbclist.p);
if (l_isfalse(s2v(level)))
return; /* false doesn't need to be closed */
checkclosemth(L, level); /* value must have a close method */
while (cast_uint(level - L->tbclist.p) > MAXDELTA) {
L->tbclist.p += MAXDELTA; /* create a dummy node at maximum delta */
L->tbclist.p->tbclist.delta = 0;
}
level->tbclist.delta = cast(unsigned short, level - L->tbclist.p);
L->tbclist.p = level;
}
void luaF_unlinkupval (UpVal *uv) {
lua_assert(upisopen(uv));
*uv->u.open.previous = uv->u.open.next;
if (uv->u.open.next)
uv->u.open.next->u.open.previous = uv->u.open.previous;
}
/*
** Close all upvalues up to the given stack level.
*/
void luaF_closeupval (lua_State *L, StkId level) {
UpVal *uv;
StkId upl; /* stack index pointed by 'uv' */
while ((uv = L->openupval) != NULL && (upl = uplevel(uv)) >= level) {
TValue *slot = &uv->u.value; /* new position for value */
lua_assert(uplevel(uv) < L->top.p);
luaF_unlinkupval(uv); /* remove upvalue from 'openupval' list */
setobj(L, slot, uv->v.p); /* move value to upvalue slot */
uv->v.p = slot; /* now current value lives here */
if (!iswhite(uv)) { /* neither white nor dead? */
nw2black(uv); /* closed upvalues cannot be gray */
luaC_barrier(L, uv, slot);
}
}
}
/*
** Remove first element from the tbclist plus its dummy nodes.
*/
static void poptbclist (lua_State *L) {
StkId tbc = L->tbclist.p;
lua_assert(tbc->tbclist.delta > 0); /* first element cannot be dummy */
tbc -= tbc->tbclist.delta;
while (tbc > L->stack.p && tbc->tbclist.delta == 0)
tbc -= MAXDELTA; /* remove dummy nodes */
L->tbclist.p = tbc;
}
/*
** Close all upvalues and to-be-closed variables up to the given stack
** level. Return restored 'level'.
*/
StkId luaF_close (lua_State *L, StkId level, int status, int yy) {
ptrdiff_t levelrel = savestack(L, level);
luaF_closeupval(L, level); /* first, close the upvalues */
while (L->tbclist.p >= level) { /* traverse tbc's down to that level */
StkId tbc = L->tbclist.p; /* get variable index */
poptbclist(L); /* remove it from list */
prepcallclosemth(L, tbc, status, yy); /* close variable */
level = restorestack(L, levelrel);
}
return level;
}
Proto *luaF_newproto (lua_State *L) {
GCObject *o = luaC_newobj(L, LUA_VPROTO, sizeof(Proto));
Proto *f = gco2p(o);
f->k = NULL;
f->sizek = 0;
f->p = NULL;
f->sizep = 0;
f->code = NULL;
f->sizecode = 0;
f->lineinfo = NULL;
f->sizelineinfo = 0;
f->abslineinfo = NULL;
f->sizeabslineinfo = 0;
f->upvalues = NULL;
f->sizeupvalues = 0;
f->numparams = 0;
f->is_vararg = 0;
f->maxstacksize = 0;
f->locvars = NULL;
f->sizelocvars = 0;
f->linedefined = 0;
f->lastlinedefined = 0;
f->source = NULL;
return f;
}
void luaF_freeproto (lua_State *L, Proto *f) {
luaM_freearray(L, f->code, f->sizecode);
luaM_freearray(L, f->p, f->sizep);
luaM_freearray(L, f->k, f->sizek);
luaM_freearray(L, f->lineinfo, f->sizelineinfo);
luaM_freearray(L, f->abslineinfo, f->sizeabslineinfo);
luaM_freearray(L, f->locvars, f->sizelocvars);
luaM_freearray(L, f->upvalues, f->sizeupvalues);
luaM_free(L, f);
}
/*
** Look for n-th local variable at line 'line' in function 'func'.
** Returns NULL if not found.
*/
const char *luaF_getlocalname (const Proto *f, int local_number, int pc) {
int i;
for (i = 0; i<f->sizelocvars && f->locvars[i].startpc <= pc; i++) {
if (pc < f->locvars[i].endpc) { /* is variable active? */
local_number--;
if (local_number == 0)
return getstr(f->locvars[i].varname);
}
}
return NULL; /* not found */
}

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/*
** $Id: lfunc.h $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
#ifndef lfunc_h
#define lfunc_h
#include "lobject.h"
#define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \
cast_int(sizeof(TValue)) * (n))
#define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \
cast_int(sizeof(TValue *)) * (n))
/* test whether thread is in 'twups' list */
#define isintwups(L) (L->twups != L)
/*
** maximum number of upvalues in a closure (both C and Lua). (Value
** must fit in a VM register.)
*/
#define MAXUPVAL 255
#define upisopen(up) ((up)->v.p != &(up)->u.value)
#define uplevel(up) check_exp(upisopen(up), cast(StkId, (up)->v.p))
/*
** maximum number of misses before giving up the cache of closures
** in prototypes
*/
#define MAXMISS 10
/* special status to close upvalues preserving the top of the stack */
#define CLOSEKTOP (-1)
LUAI_FUNC Proto *luaF_newproto (lua_State *L);
LUAI_FUNC CClosure *luaF_newCclosure (lua_State *L, int nupvals);
LUAI_FUNC LClosure *luaF_newLclosure (lua_State *L, int nupvals);
LUAI_FUNC void luaF_initupvals (lua_State *L, LClosure *cl);
LUAI_FUNC UpVal *luaF_findupval (lua_State *L, StkId level);
LUAI_FUNC void luaF_newtbcupval (lua_State *L, StkId level);
LUAI_FUNC void luaF_closeupval (lua_State *L, StkId level);
LUAI_FUNC StkId luaF_close (lua_State *L, StkId level, int status, int yy);
LUAI_FUNC void luaF_unlinkupval (UpVal *uv);
LUAI_FUNC void luaF_freeproto (lua_State *L, Proto *f);
LUAI_FUNC const char *luaF_getlocalname (const Proto *func, int local_number,
int pc);
#endif

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/*
** $Id: lgc.h $
** Garbage Collector
** See Copyright Notice in lua.h
*/
#ifndef lgc_h
#define lgc_h
#include "lobject.h"
#include "lstate.h"
/*
** Collectable objects may have one of three colors: white, which means
** the object is not marked; gray, which means the object is marked, but
** its references may be not marked; and black, which means that the
** object and all its references are marked. The main invariant of the
** garbage collector, while marking objects, is that a black object can
** never point to a white one. Moreover, any gray object must be in a
** "gray list" (gray, grayagain, weak, allweak, ephemeron) so that it
** can be visited again before finishing the collection cycle. (Open
** upvalues are an exception to this rule.) These lists have no meaning
** when the invariant is not being enforced (e.g., sweep phase).
*/
/*
** Possible states of the Garbage Collector
*/
#define GCSpropagate 0
#define GCSenteratomic 1
#define GCSatomic 2
#define GCSswpallgc 3
#define GCSswpfinobj 4
#define GCSswptobefnz 5
#define GCSswpend 6
#define GCScallfin 7
#define GCSpause 8
#define issweepphase(g) \
(GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
/*
** macro to tell when main invariant (white objects cannot point to black
** ones) must be kept. During a collection, the sweep
** phase may break the invariant, as objects turned white may point to
** still-black objects. The invariant is restored when sweep ends and
** all objects are white again.
*/
#define keepinvariant(g) ((g)->gcstate <= GCSatomic)
/*
** some useful bit tricks
*/
#define resetbits(x,m) ((x) &= cast_byte(~(m)))
#define setbits(x,m) ((x) |= (m))
#define testbits(x,m) ((x) & (m))
#define bitmask(b) (1<<(b))
#define bit2mask(b1,b2) (bitmask(b1) | bitmask(b2))
#define l_setbit(x,b) setbits(x, bitmask(b))
#define resetbit(x,b) resetbits(x, bitmask(b))
#define testbit(x,b) testbits(x, bitmask(b))
/*
** Layout for bit use in 'marked' field. First three bits are
** used for object "age" in generational mode. Last bit is used
** by tests.
*/
#define WHITE0BIT 3 /* object is white (type 0) */
#define WHITE1BIT 4 /* object is white (type 1) */
#define BLACKBIT 5 /* object is black */
#define FINALIZEDBIT 6 /* object has been marked for finalization */
#define TESTBIT 7
#define WHITEBITS bit2mask(WHITE0BIT, WHITE1BIT)
#define iswhite(x) testbits((x)->marked, WHITEBITS)
#define isblack(x) testbit((x)->marked, BLACKBIT)
#define isgray(x) /* neither white nor black */ \
(!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))
#define tofinalize(x) testbit((x)->marked, FINALIZEDBIT)
#define otherwhite(g) ((g)->currentwhite ^ WHITEBITS)
#define isdeadm(ow,m) ((m) & (ow))
#define isdead(g,v) isdeadm(otherwhite(g), (v)->marked)
#define changewhite(x) ((x)->marked ^= WHITEBITS)
#define nw2black(x) \
check_exp(!iswhite(x), l_setbit((x)->marked, BLACKBIT))
#define luaC_white(g) cast_byte((g)->currentwhite & WHITEBITS)
/* object age in generational mode */
#define G_NEW 0 /* created in current cycle */
#define G_SURVIVAL 1 /* created in previous cycle */
#define G_OLD0 2 /* marked old by frw. barrier in this cycle */
#define G_OLD1 3 /* first full cycle as old */
#define G_OLD 4 /* really old object (not to be visited) */
#define G_TOUCHED1 5 /* old object touched this cycle */
#define G_TOUCHED2 6 /* old object touched in previous cycle */
#define AGEBITS 7 /* all age bits (111) */
#define getage(o) ((o)->marked & AGEBITS)
#define setage(o,a) ((o)->marked = cast_byte(((o)->marked & (~AGEBITS)) | a))
#define isold(o) (getage(o) > G_SURVIVAL)
#define changeage(o,f,t) \
check_exp(getage(o) == (f), (o)->marked ^= ((f)^(t)))
/* Default Values for GC parameters */
#define LUAI_GENMAJORMUL 100
#define LUAI_GENMINORMUL 20
/* wait memory to double before starting new cycle */
#define LUAI_GCPAUSE 200
/*
** some gc parameters are stored divided by 4 to allow a maximum value
** up to 1023 in a 'lu_byte'.
*/
#define getgcparam(p) ((p) * 4)
#define setgcparam(p,v) ((p) = (v) / 4)
#define LUAI_GCMUL 100
/* how much to allocate before next GC step (log2) */
#define LUAI_GCSTEPSIZE 13 /* 8 KB */
/*
** Check whether the declared GC mode is generational. While in
** generational mode, the collector can go temporarily to incremental
** mode to improve performance. This is signaled by 'g->lastatomic != 0'.
*/
#define isdecGCmodegen(g) (g->gckind == KGC_GEN || g->lastatomic != 0)
/*
** Control when GC is running:
*/
#define GCSTPUSR 1 /* bit true when GC stopped by user */
#define GCSTPGC 2 /* bit true when GC stopped by itself */
#define GCSTPCLS 4 /* bit true when closing Lua state */
#define gcrunning(g) ((g)->gcstp == 0)
/*
** Does one step of collection when debt becomes positive. 'pre'/'pos'
** allows some adjustments to be done only when needed. macro
** 'condchangemem' is used only for heavy tests (forcing a full
** GC cycle on every opportunity)
*/
#define luaC_condGC(L,pre,pos) \
{ if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \
condchangemem(L,pre,pos); }
/* more often than not, 'pre'/'pos' are empty */
#define luaC_checkGC(L) luaC_condGC(L,(void)0,(void)0)
#define luaC_objbarrier(L,p,o) ( \
(isblack(p) && iswhite(o)) ? \
luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))
#define luaC_barrier(L,p,v) ( \
iscollectable(v) ? luaC_objbarrier(L,p,gcvalue(v)) : cast_void(0))
#define luaC_objbarrierback(L,p,o) ( \
(isblack(p) && iswhite(o)) ? luaC_barrierback_(L,p) : cast_void(0))
#define luaC_barrierback(L,p,v) ( \
iscollectable(v) ? luaC_objbarrierback(L, p, gcvalue(v)) : cast_void(0))
LUAI_FUNC void luaC_fix (lua_State *L, GCObject *o);
LUAI_FUNC void luaC_freeallobjects (lua_State *L);
LUAI_FUNC void luaC_step (lua_State *L);
LUAI_FUNC void luaC_runtilstate (lua_State *L, int statesmask);
LUAI_FUNC void luaC_fullgc (lua_State *L, int isemergency);
LUAI_FUNC GCObject *luaC_newobj (lua_State *L, int tt, size_t sz);
LUAI_FUNC GCObject *luaC_newobjdt (lua_State *L, int tt, size_t sz,
size_t offset);
LUAI_FUNC void luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v);
LUAI_FUNC void luaC_barrierback_ (lua_State *L, GCObject *o);
LUAI_FUNC void luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt);
LUAI_FUNC void luaC_changemode (lua_State *L, int newmode);
#endif

65
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/*
** $Id: linit.c $
** Initialization of libraries for lua.c and other clients
** See Copyright Notice in lua.h
*/
#define linit_c
#define LUA_LIB
/*
** If you embed Lua in your program and need to open the standard
** libraries, call luaL_openlibs in your program. If you need a
** different set of libraries, copy this file to your project and edit
** it to suit your needs.
**
** You can also *preload* libraries, so that a later 'require' can
** open the library, which is already linked to the application.
** For that, do the following code:
**
** luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
** lua_pushcfunction(L, luaopen_modname);
** lua_setfield(L, -2, modname);
** lua_pop(L, 1); // remove PRELOAD table
*/
#include "lprefix.h"
#include <stddef.h>
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
/*
** these libs are loaded by lua.c and are readily available to any Lua
** program
*/
static const luaL_Reg loadedlibs[] = {
{LUA_GNAME, luaopen_base},
{LUA_LOADLIBNAME, luaopen_package},
{LUA_COLIBNAME, luaopen_coroutine},
{LUA_TABLIBNAME, luaopen_table},
{LUA_IOLIBNAME, luaopen_io},
{LUA_OSLIBNAME, luaopen_os},
{LUA_STRLIBNAME, luaopen_string},
{LUA_MATHLIBNAME, luaopen_math},
{LUA_UTF8LIBNAME, luaopen_utf8},
{LUA_DBLIBNAME, luaopen_debug},
{NULL, NULL}
};
LUALIB_API void luaL_openlibs (lua_State *L) {
const luaL_Reg *lib;
/* "require" functions from 'loadedlibs' and set results to global table */
for (lib = loadedlibs; lib->func; lib++) {
luaL_requiref(L, lib->name, lib->func, 1);
lua_pop(L, 1); /* remove lib */
}
}

841
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/*
** $Id: liolib.c $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
#define liolib_c
#define LUA_LIB
#include "lprefix.h"
#include <ctype.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/*
** Change this macro to accept other modes for 'fopen' besides
** the standard ones.
*/
#if !defined(l_checkmode)
/* accepted extensions to 'mode' in 'fopen' */
#if !defined(L_MODEEXT)
#define L_MODEEXT "b"
#endif
/* Check whether 'mode' matches '[rwa]%+?[L_MODEEXT]*' */
static int l_checkmode (const char *mode) {
return (*mode != '\0' && strchr("rwa", *(mode++)) != NULL &&
(*mode != '+' || ((void)(++mode), 1)) && /* skip if char is '+' */
(strspn(mode, L_MODEEXT) == strlen(mode))); /* check extensions */
}
#endif
/*
** {======================================================
** l_popen spawns a new process connected to the current
** one through the file streams.
** =======================================================
*/
#if !defined(l_popen) /* { */
#if defined(LUA_USE_POSIX) /* { */
#define l_popen(L,c,m) (fflush(NULL), popen(c,m))
#define l_pclose(L,file) (pclose(file))
#elif defined(LUA_USE_WINDOWS) /* }{ */
#define l_popen(L,c,m) (_popen(c,m))
#define l_pclose(L,file) (_pclose(file))
#if !defined(l_checkmodep)
/* Windows accepts "[rw][bt]?" as valid modes */
#define l_checkmodep(m) ((m[0] == 'r' || m[0] == 'w') && \
(m[1] == '\0' || ((m[1] == 'b' || m[1] == 't') && m[2] == '\0')))
#endif
#else /* }{ */
/* ISO C definitions */
#define l_popen(L,c,m) \
((void)c, (void)m, \
luaL_error(L, "'popen' not supported"), \
(FILE*)0)
#define l_pclose(L,file) ((void)L, (void)file, -1)
#endif /* } */
#endif /* } */
#if !defined(l_checkmodep)
/* By default, Lua accepts only "r" or "w" as valid modes */
#define l_checkmodep(m) ((m[0] == 'r' || m[0] == 'w') && m[1] == '\0')
#endif
/* }====================================================== */
#if !defined(l_getc) /* { */
#if defined(LUA_USE_POSIX)
#define l_getc(f) getc_unlocked(f)
#define l_lockfile(f) flockfile(f)
#define l_unlockfile(f) funlockfile(f)
#else
#define l_getc(f) getc(f)
#define l_lockfile(f) ((void)0)
#define l_unlockfile(f) ((void)0)
#endif
#endif /* } */
/*
** {======================================================
** l_fseek: configuration for longer offsets
** =======================================================
*/
#if !defined(l_fseek) /* { */
#if defined(LUA_USE_POSIX) /* { */
#include <sys/types.h>
#define l_fseek(f,o,w) fseeko(f,o,w)
#define l_ftell(f) ftello(f)
#define l_seeknum off_t
#elif defined(LUA_USE_WINDOWS) && !defined(_CRTIMP_TYPEINFO) \
&& defined(_MSC_VER) && (_MSC_VER >= 1400) /* }{ */
/* Windows (but not DDK) and Visual C++ 2005 or higher */
#define l_fseek(f,o,w) _fseeki64(f,o,w)
#define l_ftell(f) _ftelli64(f)
#define l_seeknum __int64
#else /* }{ */
/* ISO C definitions */
#define l_fseek(f,o,w) fseek(f,o,w)
#define l_ftell(f) ftell(f)
#define l_seeknum long
#endif /* } */
#endif /* } */
/* }====================================================== */
#define IO_PREFIX "_IO_"
#define IOPREF_LEN (sizeof(IO_PREFIX)/sizeof(char) - 1)
#define IO_INPUT (IO_PREFIX "input")
#define IO_OUTPUT (IO_PREFIX "output")
typedef luaL_Stream LStream;
#define tolstream(L) ((LStream *)luaL_checkudata(L, 1, LUA_FILEHANDLE))
#define isclosed(p) ((p)->closef == NULL)
static int io_type (lua_State *L) {
LStream *p;
luaL_checkany(L, 1);
p = (LStream *)luaL_testudata(L, 1, LUA_FILEHANDLE);
if (p == NULL)
luaL_pushfail(L); /* not a file */
else if (isclosed(p))
lua_pushliteral(L, "closed file");
else
lua_pushliteral(L, "file");
return 1;
}
static int f_tostring (lua_State *L) {
LStream *p = tolstream(L);
if (isclosed(p))
lua_pushliteral(L, "file (closed)");
else
lua_pushfstring(L, "file (%p)", p->f);
return 1;
}
static FILE *tofile (lua_State *L) {
LStream *p = tolstream(L);
if (l_unlikely(isclosed(p)))
luaL_error(L, "attempt to use a closed file");
lua_assert(p->f);
return p->f;
}
/*
** When creating file handles, always creates a 'closed' file handle
** before opening the actual file; so, if there is a memory error, the
** handle is in a consistent state.
*/
static LStream *newprefile (lua_State *L) {
LStream *p = (LStream *)lua_newuserdatauv(L, sizeof(LStream), 0);
p->closef = NULL; /* mark file handle as 'closed' */
luaL_setmetatable(L, LUA_FILEHANDLE);
return p;
}
/*
** Calls the 'close' function from a file handle. The 'volatile' avoids
** a bug in some versions of the Clang compiler (e.g., clang 3.0 for
** 32 bits).
*/
static int aux_close (lua_State *L) {
LStream *p = tolstream(L);
volatile lua_CFunction cf = p->closef;
p->closef = NULL; /* mark stream as closed */
return (*cf)(L); /* close it */
}
static int f_close (lua_State *L) {
tofile(L); /* make sure argument is an open stream */
return aux_close(L);
}
static int io_close (lua_State *L) {
if (lua_isnone(L, 1)) /* no argument? */
lua_getfield(L, LUA_REGISTRYINDEX, IO_OUTPUT); /* use default output */
return f_close(L);
}
static int f_gc (lua_State *L) {
LStream *p = tolstream(L);
if (!isclosed(p) && p->f != NULL)
aux_close(L); /* ignore closed and incompletely open files */
return 0;
}
/*
** function to close regular files
*/
static int io_fclose (lua_State *L) {
LStream *p = tolstream(L);
errno = 0;
return luaL_fileresult(L, (fclose(p->f) == 0), NULL);
}
static LStream *newfile (lua_State *L) {
LStream *p = newprefile(L);
p->f = NULL;
p->closef = &io_fclose;
return p;
}
static void opencheck (lua_State *L, const char *fname, const char *mode) {
LStream *p = newfile(L);
p->f = fopen(fname, mode);
if (l_unlikely(p->f == NULL))
luaL_error(L, "cannot open file '%s' (%s)", fname, strerror(errno));
}
static int io_open (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r");
LStream *p = newfile(L);
const char *md = mode; /* to traverse/check mode */
luaL_argcheck(L, l_checkmode(md), 2, "invalid mode");
errno = 0;
p->f = fopen(filename, mode);
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
}
/*
** function to close 'popen' files
*/
static int io_pclose (lua_State *L) {
LStream *p = tolstream(L);
errno = 0;
return luaL_execresult(L, l_pclose(L, p->f));
}
static int io_popen (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
const char *mode = luaL_optstring(L, 2, "r");
LStream *p = newprefile(L);
luaL_argcheck(L, l_checkmodep(mode), 2, "invalid mode");
errno = 0;
p->f = l_popen(L, filename, mode);
p->closef = &io_pclose;
return (p->f == NULL) ? luaL_fileresult(L, 0, filename) : 1;
}
static int io_tmpfile (lua_State *L) {
LStream *p = newfile(L);
errno = 0;
p->f = tmpfile();
return (p->f == NULL) ? luaL_fileresult(L, 0, NULL) : 1;
}
static FILE *getiofile (lua_State *L, const char *findex) {
LStream *p;
lua_getfield(L, LUA_REGISTRYINDEX, findex);
p = (LStream *)lua_touserdata(L, -1);
if (l_unlikely(isclosed(p)))
luaL_error(L, "default %s file is closed", findex + IOPREF_LEN);
return p->f;
}
static int g_iofile (lua_State *L, const char *f, const char *mode) {
if (!lua_isnoneornil(L, 1)) {
const char *filename = lua_tostring(L, 1);
if (filename)
opencheck(L, filename, mode);
else {
tofile(L); /* check that it's a valid file handle */
lua_pushvalue(L, 1);
}
lua_setfield(L, LUA_REGISTRYINDEX, f);
}
/* return current value */
lua_getfield(L, LUA_REGISTRYINDEX, f);
return 1;
}
static int io_input (lua_State *L) {
return g_iofile(L, IO_INPUT, "r");
}
static int io_output (lua_State *L) {
return g_iofile(L, IO_OUTPUT, "w");
}
static int io_readline (lua_State *L);
/*
** maximum number of arguments to 'f:lines'/'io.lines' (it + 3 must fit
** in the limit for upvalues of a closure)
*/
#define MAXARGLINE 250
/*
** Auxiliary function to create the iteration function for 'lines'.
** The iteration function is a closure over 'io_readline', with
** the following upvalues:
** 1) The file being read (first value in the stack)
** 2) the number of arguments to read
** 3) a boolean, true iff file has to be closed when finished ('toclose')
** *) a variable number of format arguments (rest of the stack)
*/
static void aux_lines (lua_State *L, int toclose) {
int n = lua_gettop(L) - 1; /* number of arguments to read */
luaL_argcheck(L, n <= MAXARGLINE, MAXARGLINE + 2, "too many arguments");
lua_pushvalue(L, 1); /* file */
lua_pushinteger(L, n); /* number of arguments to read */
lua_pushboolean(L, toclose); /* close/not close file when finished */
lua_rotate(L, 2, 3); /* move the three values to their positions */
lua_pushcclosure(L, io_readline, 3 + n);
}
static int f_lines (lua_State *L) {
tofile(L); /* check that it's a valid file handle */
aux_lines(L, 0);
return 1;
}
/*
** Return an iteration function for 'io.lines'. If file has to be
** closed, also returns the file itself as a second result (to be
** closed as the state at the exit of a generic for).
*/
static int io_lines (lua_State *L) {
int toclose;
if (lua_isnone(L, 1)) lua_pushnil(L); /* at least one argument */
if (lua_isnil(L, 1)) { /* no file name? */
lua_getfield(L, LUA_REGISTRYINDEX, IO_INPUT); /* get default input */
lua_replace(L, 1); /* put it at index 1 */
tofile(L); /* check that it's a valid file handle */
toclose = 0; /* do not close it after iteration */
}
else { /* open a new file */
const char *filename = luaL_checkstring(L, 1);
opencheck(L, filename, "r");
lua_replace(L, 1); /* put file at index 1 */
toclose = 1; /* close it after iteration */
}
aux_lines(L, toclose); /* push iteration function */
if (toclose) {
lua_pushnil(L); /* state */
lua_pushnil(L); /* control */
lua_pushvalue(L, 1); /* file is the to-be-closed variable (4th result) */
return 4;
}
else
return 1;
}
/*
** {======================================================
** READ
** =======================================================
*/
/* maximum length of a numeral */
#if !defined (L_MAXLENNUM)
#define L_MAXLENNUM 200
#endif
/* auxiliary structure used by 'read_number' */
typedef struct {
FILE *f; /* file being read */
int c; /* current character (look ahead) */
int n; /* number of elements in buffer 'buff' */
char buff[L_MAXLENNUM + 1]; /* +1 for ending '\0' */
} RN;
/*
** Add current char to buffer (if not out of space) and read next one
*/
static int nextc (RN *rn) {
if (l_unlikely(rn->n >= L_MAXLENNUM)) { /* buffer overflow? */
rn->buff[0] = '\0'; /* invalidate result */
return 0; /* fail */
}
else {
rn->buff[rn->n++] = rn->c; /* save current char */
rn->c = l_getc(rn->f); /* read next one */
return 1;
}
}
/*
** Accept current char if it is in 'set' (of size 2)
*/
static int test2 (RN *rn, const char *set) {
if (rn->c == set[0] || rn->c == set[1])
return nextc(rn);
else return 0;
}
/*
** Read a sequence of (hex)digits
*/
static int readdigits (RN *rn, int hex) {
int count = 0;
while ((hex ? isxdigit(rn->c) : isdigit(rn->c)) && nextc(rn))
count++;
return count;
}
/*
** Read a number: first reads a valid prefix of a numeral into a buffer.
** Then it calls 'lua_stringtonumber' to check whether the format is
** correct and to convert it to a Lua number.
*/
static int read_number (lua_State *L, FILE *f) {
RN rn;
int count = 0;
int hex = 0;
char decp[2];
rn.f = f; rn.n = 0;
decp[0] = lua_getlocaledecpoint(); /* get decimal point from locale */
decp[1] = '.'; /* always accept a dot */
l_lockfile(rn.f);
do { rn.c = l_getc(rn.f); } while (isspace(rn.c)); /* skip spaces */
test2(&rn, "-+"); /* optional sign */
if (test2(&rn, "00")) {
if (test2(&rn, "xX")) hex = 1; /* numeral is hexadecimal */
else count = 1; /* count initial '0' as a valid digit */
}
count += readdigits(&rn, hex); /* integral part */
if (test2(&rn, decp)) /* decimal point? */
count += readdigits(&rn, hex); /* fractional part */
if (count > 0 && test2(&rn, (hex ? "pP" : "eE"))) { /* exponent mark? */
test2(&rn, "-+"); /* exponent sign */
readdigits(&rn, 0); /* exponent digits */
}
ungetc(rn.c, rn.f); /* unread look-ahead char */
l_unlockfile(rn.f);
rn.buff[rn.n] = '\0'; /* finish string */
if (l_likely(lua_stringtonumber(L, rn.buff)))
return 1; /* ok, it is a valid number */
else { /* invalid format */
lua_pushnil(L); /* "result" to be removed */
return 0; /* read fails */
}
}
static int test_eof (lua_State *L, FILE *f) {
int c = getc(f);
ungetc(c, f); /* no-op when c == EOF */
lua_pushliteral(L, "");
return (c != EOF);
}
static int read_line (lua_State *L, FILE *f, int chop) {
luaL_Buffer b;
int c;
luaL_buffinit(L, &b);
do { /* may need to read several chunks to get whole line */
char *buff = luaL_prepbuffer(&b); /* preallocate buffer space */
int i = 0;
l_lockfile(f); /* no memory errors can happen inside the lock */
while (i < LUAL_BUFFERSIZE && (c = l_getc(f)) != EOF && c != '\n')
buff[i++] = c; /* read up to end of line or buffer limit */
l_unlockfile(f);
luaL_addsize(&b, i);
} while (c != EOF && c != '\n'); /* repeat until end of line */
if (!chop && c == '\n') /* want a newline and have one? */
luaL_addchar(&b, c); /* add ending newline to result */
luaL_pushresult(&b); /* close buffer */
/* return ok if read something (either a newline or something else) */
return (c == '\n' || lua_rawlen(L, -1) > 0);
}
static void read_all (lua_State *L, FILE *f) {
size_t nr;
luaL_Buffer b;
luaL_buffinit(L, &b);
do { /* read file in chunks of LUAL_BUFFERSIZE bytes */
char *p = luaL_prepbuffer(&b);
nr = fread(p, sizeof(char), LUAL_BUFFERSIZE, f);
luaL_addsize(&b, nr);
} while (nr == LUAL_BUFFERSIZE);
luaL_pushresult(&b); /* close buffer */
}
static int read_chars (lua_State *L, FILE *f, size_t n) {
size_t nr; /* number of chars actually read */
char *p;
luaL_Buffer b;
luaL_buffinit(L, &b);
p = luaL_prepbuffsize(&b, n); /* prepare buffer to read whole block */
nr = fread(p, sizeof(char), n, f); /* try to read 'n' chars */
luaL_addsize(&b, nr);
luaL_pushresult(&b); /* close buffer */
return (nr > 0); /* true iff read something */
}
static int g_read (lua_State *L, FILE *f, int first) {
int nargs = lua_gettop(L) - 1;
int n, success;
clearerr(f);
errno = 0;
if (nargs == 0) { /* no arguments? */
success = read_line(L, f, 1);
n = first + 1; /* to return 1 result */
}
else {
/* ensure stack space for all results and for auxlib's buffer */
luaL_checkstack(L, nargs+LUA_MINSTACK, "too many arguments");
success = 1;
for (n = first; nargs-- && success; n++) {
if (lua_type(L, n) == LUA_TNUMBER) {
size_t l = (size_t)luaL_checkinteger(L, n);
success = (l == 0) ? test_eof(L, f) : read_chars(L, f, l);
}
else {
const char *p = luaL_checkstring(L, n);
if (*p == '*') p++; /* skip optional '*' (for compatibility) */
switch (*p) {
case 'n': /* number */
success = read_number(L, f);
break;
case 'l': /* line */
success = read_line(L, f, 1);
break;
case 'L': /* line with end-of-line */
success = read_line(L, f, 0);
break;
case 'a': /* file */
read_all(L, f); /* read entire file */
success = 1; /* always success */
break;
default:
return luaL_argerror(L, n, "invalid format");
}
}
}
}
if (ferror(f))
return luaL_fileresult(L, 0, NULL);
if (!success) {
lua_pop(L, 1); /* remove last result */
luaL_pushfail(L); /* push nil instead */
}
return n - first;
}
static int io_read (lua_State *L) {
return g_read(L, getiofile(L, IO_INPUT), 1);
}
static int f_read (lua_State *L) {
return g_read(L, tofile(L), 2);
}
/*
** Iteration function for 'lines'.
*/
static int io_readline (lua_State *L) {
LStream *p = (LStream *)lua_touserdata(L, lua_upvalueindex(1));
int i;
int n = (int)lua_tointeger(L, lua_upvalueindex(2));
if (isclosed(p)) /* file is already closed? */
return luaL_error(L, "file is already closed");
lua_settop(L , 1);
luaL_checkstack(L, n, "too many arguments");
for (i = 1; i <= n; i++) /* push arguments to 'g_read' */
lua_pushvalue(L, lua_upvalueindex(3 + i));
n = g_read(L, p->f, 2); /* 'n' is number of results */
lua_assert(n > 0); /* should return at least a nil */
if (lua_toboolean(L, -n)) /* read at least one value? */
return n; /* return them */
else { /* first result is false: EOF or error */
if (n > 1) { /* is there error information? */
/* 2nd result is error message */
return luaL_error(L, "%s", lua_tostring(L, -n + 1));
}
if (lua_toboolean(L, lua_upvalueindex(3))) { /* generator created file? */
lua_settop(L, 0); /* clear stack */
lua_pushvalue(L, lua_upvalueindex(1)); /* push file at index 1 */
aux_close(L); /* close it */
}
return 0;
}
}
/* }====================================================== */
static int g_write (lua_State *L, FILE *f, int arg) {
int nargs = lua_gettop(L) - arg;
int status = 1;
errno = 0;
for (; nargs--; arg++) {
if (lua_type(L, arg) == LUA_TNUMBER) {
/* optimization: could be done exactly as for strings */
int len = lua_isinteger(L, arg)
? fprintf(f, LUA_INTEGER_FMT,
(LUAI_UACINT)lua_tointeger(L, arg))
: fprintf(f, LUA_NUMBER_FMT,
(LUAI_UACNUMBER)lua_tonumber(L, arg));
status = status && (len > 0);
}
else {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
status = status && (fwrite(s, sizeof(char), l, f) == l);
}
}
if (l_likely(status))
return 1; /* file handle already on stack top */
else
return luaL_fileresult(L, status, NULL);
}
static int io_write (lua_State *L) {
return g_write(L, getiofile(L, IO_OUTPUT), 1);
}
static int f_write (lua_State *L) {
FILE *f = tofile(L);
lua_pushvalue(L, 1); /* push file at the stack top (to be returned) */
return g_write(L, f, 2);
}
static int f_seek (lua_State *L) {
static const int mode[] = {SEEK_SET, SEEK_CUR, SEEK_END};
static const char *const modenames[] = {"set", "cur", "end", NULL};
FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, "cur", modenames);
lua_Integer p3 = luaL_optinteger(L, 3, 0);
l_seeknum offset = (l_seeknum)p3;
luaL_argcheck(L, (lua_Integer)offset == p3, 3,
"not an integer in proper range");
errno = 0;
op = l_fseek(f, offset, mode[op]);
if (l_unlikely(op))
return luaL_fileresult(L, 0, NULL); /* error */
else {
lua_pushinteger(L, (lua_Integer)l_ftell(f));
return 1;
}
}
static int f_setvbuf (lua_State *L) {
static const int mode[] = {_IONBF, _IOFBF, _IOLBF};
static const char *const modenames[] = {"no", "full", "line", NULL};
FILE *f = tofile(L);
int op = luaL_checkoption(L, 2, NULL, modenames);
lua_Integer sz = luaL_optinteger(L, 3, LUAL_BUFFERSIZE);
int res;
errno = 0;
res = setvbuf(f, NULL, mode[op], (size_t)sz);
return luaL_fileresult(L, res == 0, NULL);
}
static int io_flush (lua_State *L) {
FILE *f = getiofile(L, IO_OUTPUT);
errno = 0;
return luaL_fileresult(L, fflush(f) == 0, NULL);
}
static int f_flush (lua_State *L) {
FILE *f = tofile(L);
errno = 0;
return luaL_fileresult(L, fflush(f) == 0, NULL);
}
/*
** functions for 'io' library
*/
static const luaL_Reg iolib[] = {
{"close", io_close},
{"flush", io_flush},
{"input", io_input},
{"lines", io_lines},
{"open", io_open},
{"output", io_output},
{"popen", io_popen},
{"read", io_read},
{"tmpfile", io_tmpfile},
{"type", io_type},
{"write", io_write},
{NULL, NULL}
};
/*
** methods for file handles
*/
static const luaL_Reg meth[] = {
{"read", f_read},
{"write", f_write},
{"lines", f_lines},
{"flush", f_flush},
{"seek", f_seek},
{"close", f_close},
{"setvbuf", f_setvbuf},
{NULL, NULL}
};
/*
** metamethods for file handles
*/
static const luaL_Reg metameth[] = {
{"__index", NULL}, /* placeholder */
{"__gc", f_gc},
{"__close", f_gc},
{"__tostring", f_tostring},
{NULL, NULL}
};
static void createmeta (lua_State *L) {
luaL_newmetatable(L, LUA_FILEHANDLE); /* metatable for file handles */
luaL_setfuncs(L, metameth, 0); /* add metamethods to new metatable */
luaL_newlibtable(L, meth); /* create method table */
luaL_setfuncs(L, meth, 0); /* add file methods to method table */
lua_setfield(L, -2, "__index"); /* metatable.__index = method table */
lua_pop(L, 1); /* pop metatable */
}
/*
** function to (not) close the standard files stdin, stdout, and stderr
*/
static int io_noclose (lua_State *L) {
LStream *p = tolstream(L);
p->closef = &io_noclose; /* keep file opened */
luaL_pushfail(L);
lua_pushliteral(L, "cannot close standard file");
return 2;
}
static void createstdfile (lua_State *L, FILE *f, const char *k,
const char *fname) {
LStream *p = newprefile(L);
p->f = f;
p->closef = &io_noclose;
if (k != NULL) {
lua_pushvalue(L, -1);
lua_setfield(L, LUA_REGISTRYINDEX, k); /* add file to registry */
}
lua_setfield(L, -2, fname); /* add file to module */
}
LUAMOD_API int luaopen_io (lua_State *L) {
luaL_newlib(L, iolib); /* new module */
createmeta(L);
/* create (and set) default files */
createstdfile(L, stdin, IO_INPUT, "stdin");
createstdfile(L, stdout, IO_OUTPUT, "stdout");
createstdfile(L, stderr, NULL, "stderr");
return 1;
}

112
lua-5.4.7/src/ljumptab.h Normal file
View File

@ -0,0 +1,112 @@
/*
** $Id: ljumptab.h $
** Jump Table for the Lua interpreter
** See Copyright Notice in lua.h
*/
#undef vmdispatch
#undef vmcase
#undef vmbreak
#define vmdispatch(x) goto *disptab[x];
#define vmcase(l) L_##l:
#define vmbreak vmfetch(); vmdispatch(GET_OPCODE(i));
static const void *const disptab[NUM_OPCODES] = {
#if 0
** you can update the following list with this command:
**
** sed -n '/^OP_/\!d; s/OP_/\&\&L_OP_/ ; s/,.*/,/ ; s/\/.*// ; p' lopcodes.h
**
#endif
&&L_OP_MOVE,
&&L_OP_LOADI,
&&L_OP_LOADF,
&&L_OP_LOADK,
&&L_OP_LOADKX,
&&L_OP_LOADFALSE,
&&L_OP_LFALSESKIP,
&&L_OP_LOADTRUE,
&&L_OP_LOADNIL,
&&L_OP_GETUPVAL,
&&L_OP_SETUPVAL,
&&L_OP_GETTABUP,
&&L_OP_GETTABLE,
&&L_OP_GETI,
&&L_OP_GETFIELD,
&&L_OP_SETTABUP,
&&L_OP_SETTABLE,
&&L_OP_SETI,
&&L_OP_SETFIELD,
&&L_OP_NEWTABLE,
&&L_OP_SELF,
&&L_OP_ADDI,
&&L_OP_ADDK,
&&L_OP_SUBK,
&&L_OP_MULK,
&&L_OP_MODK,
&&L_OP_POWK,
&&L_OP_DIVK,
&&L_OP_IDIVK,
&&L_OP_BANDK,
&&L_OP_BORK,
&&L_OP_BXORK,
&&L_OP_SHRI,
&&L_OP_SHLI,
&&L_OP_ADD,
&&L_OP_SUB,
&&L_OP_MUL,
&&L_OP_MOD,
&&L_OP_POW,
&&L_OP_DIV,
&&L_OP_IDIV,
&&L_OP_BAND,
&&L_OP_BOR,
&&L_OP_BXOR,
&&L_OP_SHL,
&&L_OP_SHR,
&&L_OP_MMBIN,
&&L_OP_MMBINI,
&&L_OP_MMBINK,
&&L_OP_UNM,
&&L_OP_BNOT,
&&L_OP_NOT,
&&L_OP_LEN,
&&L_OP_CONCAT,
&&L_OP_CLOSE,
&&L_OP_TBC,
&&L_OP_JMP,
&&L_OP_EQ,
&&L_OP_LT,
&&L_OP_LE,
&&L_OP_EQK,
&&L_OP_EQI,
&&L_OP_LTI,
&&L_OP_LEI,
&&L_OP_GTI,
&&L_OP_GEI,
&&L_OP_TEST,
&&L_OP_TESTSET,
&&L_OP_CALL,
&&L_OP_TAILCALL,
&&L_OP_RETURN,
&&L_OP_RETURN0,
&&L_OP_RETURN1,
&&L_OP_FORLOOP,
&&L_OP_FORPREP,
&&L_OP_TFORPREP,
&&L_OP_TFORCALL,
&&L_OP_TFORLOOP,
&&L_OP_SETLIST,
&&L_OP_CLOSURE,
&&L_OP_VARARG,
&&L_OP_VARARGPREP,
&&L_OP_EXTRAARG
};

581
lua-5.4.7/src/llex.c Normal file
View File

@ -0,0 +1,581 @@
/*
** $Id: llex.c $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
#define llex_c
#define LUA_CORE
#include "lprefix.h"
#include <locale.h>
#include <string.h>
#include "lua.h"
#include "lctype.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.h"
#include "llex.h"
#include "lobject.h"
#include "lparser.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "lzio.h"
#define next(ls) (ls->current = zgetc(ls->z))
#define currIsNewline(ls) (ls->current == '\n' || ls->current == '\r')
/* ORDER RESERVED */
static const char *const luaX_tokens [] = {
"and", "break", "do", "else", "elseif",
"end", "false", "for", "function", "goto", "if",
"in", "local", "nil", "not", "or", "repeat",
"return", "then", "true", "until", "while",
"//", "..", "...", "==", ">=", "<=", "~=",
"<<", ">>", "::", "<eof>",
"<number>", "<integer>", "<name>", "<string>"
};
#define save_and_next(ls) (save(ls, ls->current), next(ls))
static l_noret lexerror (LexState *ls, const char *msg, int token);
static void save (LexState *ls, int c) {
Mbuffer *b = ls->buff;
if (luaZ_bufflen(b) + 1 > luaZ_sizebuffer(b)) {
size_t newsize;
if (luaZ_sizebuffer(b) >= MAX_SIZE/2)
lexerror(ls, "lexical element too long", 0);
newsize = luaZ_sizebuffer(b) * 2;
luaZ_resizebuffer(ls->L, b, newsize);
}
b->buffer[luaZ_bufflen(b)++] = cast_char(c);
}
void luaX_init (lua_State *L) {
int i;
TString *e = luaS_newliteral(L, LUA_ENV); /* create env name */
luaC_fix(L, obj2gco(e)); /* never collect this name */
for (i=0; i<NUM_RESERVED; i++) {
TString *ts = luaS_new(L, luaX_tokens[i]);
luaC_fix(L, obj2gco(ts)); /* reserved words are never collected */
ts->extra = cast_byte(i+1); /* reserved word */
}
}
const char *luaX_token2str (LexState *ls, int token) {
if (token < FIRST_RESERVED) { /* single-byte symbols? */
if (lisprint(token))
return luaO_pushfstring(ls->L, "'%c'", token);
else /* control character */
return luaO_pushfstring(ls->L, "'<\\%d>'", token);
}
else {
const char *s = luaX_tokens[token - FIRST_RESERVED];
if (token < TK_EOS) /* fixed format (symbols and reserved words)? */
return luaO_pushfstring(ls->L, "'%s'", s);
else /* names, strings, and numerals */
return s;
}
}
static const char *txtToken (LexState *ls, int token) {
switch (token) {
case TK_NAME: case TK_STRING:
case TK_FLT: case TK_INT:
save(ls, '\0');
return luaO_pushfstring(ls->L, "'%s'", luaZ_buffer(ls->buff));
default:
return luaX_token2str(ls, token);
}
}
static l_noret lexerror (LexState *ls, const char *msg, int token) {
msg = luaG_addinfo(ls->L, msg, ls->source, ls->linenumber);
if (token)
luaO_pushfstring(ls->L, "%s near %s", msg, txtToken(ls, token));
luaD_throw(ls->L, LUA_ERRSYNTAX);
}
l_noret luaX_syntaxerror (LexState *ls, const char *msg) {
lexerror(ls, msg, ls->t.token);
}
/*
** Creates a new string and anchors it in scanner's table so that it
** will not be collected until the end of the compilation; by that time
** it should be anchored somewhere. It also internalizes long strings,
** ensuring there is only one copy of each unique string. The table
** here is used as a set: the string enters as the key, while its value
** is irrelevant. We use the string itself as the value only because it
** is a TValue readily available. Later, the code generation can change
** this value.
*/
TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
lua_State *L = ls->L;
TString *ts = luaS_newlstr(L, str, l); /* create new string */
const TValue *o = luaH_getstr(ls->h, ts);
if (!ttisnil(o)) /* string already present? */
ts = keystrval(nodefromval(o)); /* get saved copy */
else { /* not in use yet */
TValue *stv = s2v(L->top.p++); /* reserve stack space for string */
setsvalue(L, stv, ts); /* temporarily anchor the string */
luaH_finishset(L, ls->h, stv, o, stv); /* t[string] = string */
/* table is not a metatable, so it does not need to invalidate cache */
luaC_checkGC(L);
L->top.p--; /* remove string from stack */
}
return ts;
}
/*
** increment line number and skips newline sequence (any of
** \n, \r, \n\r, or \r\n)
*/
static void inclinenumber (LexState *ls) {
int old = ls->current;
lua_assert(currIsNewline(ls));
next(ls); /* skip '\n' or '\r' */
if (currIsNewline(ls) && ls->current != old)
next(ls); /* skip '\n\r' or '\r\n' */
if (++ls->linenumber >= MAX_INT)
lexerror(ls, "chunk has too many lines", 0);
}
void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
int firstchar) {
ls->t.token = 0;
ls->L = L;
ls->current = firstchar;
ls->lookahead.token = TK_EOS; /* no look-ahead token */
ls->z = z;
ls->fs = NULL;
ls->linenumber = 1;
ls->lastline = 1;
ls->source = source;
ls->envn = luaS_newliteral(L, LUA_ENV); /* get env name */
luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER); /* initialize buffer */
}
/*
** =======================================================
** LEXICAL ANALYZER
** =======================================================
*/
static int check_next1 (LexState *ls, int c) {
if (ls->current == c) {
next(ls);
return 1;
}
else return 0;
}
/*
** Check whether current char is in set 'set' (with two chars) and
** saves it
*/
static int check_next2 (LexState *ls, const char *set) {
lua_assert(set[2] == '\0');
if (ls->current == set[0] || ls->current == set[1]) {
save_and_next(ls);
return 1;
}
else return 0;
}
/* LUA_NUMBER */
/*
** This function is quite liberal in what it accepts, as 'luaO_str2num'
** will reject ill-formed numerals. Roughly, it accepts the following
** pattern:
**
** %d(%x|%.|([Ee][+-]?))* | 0[Xx](%x|%.|([Pp][+-]?))*
**
** The only tricky part is to accept [+-] only after a valid exponent
** mark, to avoid reading '3-4' or '0xe+1' as a single number.
**
** The caller might have already read an initial dot.
*/
static int read_numeral (LexState *ls, SemInfo *seminfo) {
TValue obj;
const char *expo = "Ee";
int first = ls->current;
lua_assert(lisdigit(ls->current));
save_and_next(ls);
if (first == '0' && check_next2(ls, "xX")) /* hexadecimal? */
expo = "Pp";
for (;;) {
if (check_next2(ls, expo)) /* exponent mark? */
check_next2(ls, "-+"); /* optional exponent sign */
else if (lisxdigit(ls->current) || ls->current == '.') /* '%x|%.' */
save_and_next(ls);
else break;
}
if (lislalpha(ls->current)) /* is numeral touching a letter? */
save_and_next(ls); /* force an error */
save(ls, '\0');
if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */
lexerror(ls, "malformed number", TK_FLT);
if (ttisinteger(&obj)) {
seminfo->i = ivalue(&obj);
return TK_INT;
}
else {
lua_assert(ttisfloat(&obj));
seminfo->r = fltvalue(&obj);
return TK_FLT;
}
}
/*
** read a sequence '[=*[' or ']=*]', leaving the last bracket. If
** sequence is well formed, return its number of '='s + 2; otherwise,
** return 1 if it is a single bracket (no '='s and no 2nd bracket);
** otherwise (an unfinished '[==...') return 0.
*/
static size_t skip_sep (LexState *ls) {
size_t count = 0;
int s = ls->current;
lua_assert(s == '[' || s == ']');
save_and_next(ls);
while (ls->current == '=') {
save_and_next(ls);
count++;
}
return (ls->current == s) ? count + 2
: (count == 0) ? 1
: 0;
}
static void read_long_string (LexState *ls, SemInfo *seminfo, size_t sep) {
int line = ls->linenumber; /* initial line (for error message) */
save_and_next(ls); /* skip 2nd '[' */
if (currIsNewline(ls)) /* string starts with a newline? */
inclinenumber(ls); /* skip it */
for (;;) {
switch (ls->current) {
case EOZ: { /* error */
const char *what = (seminfo ? "string" : "comment");
const char *msg = luaO_pushfstring(ls->L,
"unfinished long %s (starting at line %d)", what, line);
lexerror(ls, msg, TK_EOS);
break; /* to avoid warnings */
}
case ']': {
if (skip_sep(ls) == sep) {
save_and_next(ls); /* skip 2nd ']' */
goto endloop;
}
break;
}
case '\n': case '\r': {
save(ls, '\n');
inclinenumber(ls);
if (!seminfo) luaZ_resetbuffer(ls->buff); /* avoid wasting space */
break;
}
default: {
if (seminfo) save_and_next(ls);
else next(ls);
}
}
} endloop:
if (seminfo)
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + sep,
luaZ_bufflen(ls->buff) - 2 * sep);
}
static void esccheck (LexState *ls, int c, const char *msg) {
if (!c) {
if (ls->current != EOZ)
save_and_next(ls); /* add current to buffer for error message */
lexerror(ls, msg, TK_STRING);
}
}
static int gethexa (LexState *ls) {
save_and_next(ls);
esccheck (ls, lisxdigit(ls->current), "hexadecimal digit expected");
return luaO_hexavalue(ls->current);
}
static int readhexaesc (LexState *ls) {
int r = gethexa(ls);
r = (r << 4) + gethexa(ls);
luaZ_buffremove(ls->buff, 2); /* remove saved chars from buffer */
return r;
}
static unsigned long readutf8esc (LexState *ls) {
unsigned long r;
int i = 4; /* chars to be removed: '\', 'u', '{', and first digit */
save_and_next(ls); /* skip 'u' */
esccheck(ls, ls->current == '{', "missing '{'");
r = gethexa(ls); /* must have at least one digit */
while (cast_void(save_and_next(ls)), lisxdigit(ls->current)) {
i++;
esccheck(ls, r <= (0x7FFFFFFFu >> 4), "UTF-8 value too large");
r = (r << 4) + luaO_hexavalue(ls->current);
}
esccheck(ls, ls->current == '}', "missing '}'");
next(ls); /* skip '}' */
luaZ_buffremove(ls->buff, i); /* remove saved chars from buffer */
return r;
}
static void utf8esc (LexState *ls) {
char buff[UTF8BUFFSZ];
int n = luaO_utf8esc(buff, readutf8esc(ls));
for (; n > 0; n--) /* add 'buff' to string */
save(ls, buff[UTF8BUFFSZ - n]);
}
static int readdecesc (LexState *ls) {
int i;
int r = 0; /* result accumulator */
for (i = 0; i < 3 && lisdigit(ls->current); i++) { /* read up to 3 digits */
r = 10*r + ls->current - '0';
save_and_next(ls);
}
esccheck(ls, r <= UCHAR_MAX, "decimal escape too large");
luaZ_buffremove(ls->buff, i); /* remove read digits from buffer */
return r;
}
static void read_string (LexState *ls, int del, SemInfo *seminfo) {
save_and_next(ls); /* keep delimiter (for error messages) */
while (ls->current != del) {
switch (ls->current) {
case EOZ:
lexerror(ls, "unfinished string", TK_EOS);
break; /* to avoid warnings */
case '\n':
case '\r':
lexerror(ls, "unfinished string", TK_STRING);
break; /* to avoid warnings */
case '\\': { /* escape sequences */
int c; /* final character to be saved */
save_and_next(ls); /* keep '\\' for error messages */
switch (ls->current) {
case 'a': c = '\a'; goto read_save;
case 'b': c = '\b'; goto read_save;
case 'f': c = '\f'; goto read_save;
case 'n': c = '\n'; goto read_save;
case 'r': c = '\r'; goto read_save;
case 't': c = '\t'; goto read_save;
case 'v': c = '\v'; goto read_save;
case 'x': c = readhexaesc(ls); goto read_save;
case 'u': utf8esc(ls); goto no_save;
case '\n': case '\r':
inclinenumber(ls); c = '\n'; goto only_save;
case '\\': case '\"': case '\'':
c = ls->current; goto read_save;
case EOZ: goto no_save; /* will raise an error next loop */
case 'z': { /* zap following span of spaces */
luaZ_buffremove(ls->buff, 1); /* remove '\\' */
next(ls); /* skip the 'z' */
while (lisspace(ls->current)) {
if (currIsNewline(ls)) inclinenumber(ls);
else next(ls);
}
goto no_save;
}
default: {
esccheck(ls, lisdigit(ls->current), "invalid escape sequence");
c = readdecesc(ls); /* digital escape '\ddd' */
goto only_save;
}
}
read_save:
next(ls);
/* go through */
only_save:
luaZ_buffremove(ls->buff, 1); /* remove '\\' */
save(ls, c);
/* go through */
no_save: break;
}
default:
save_and_next(ls);
}
}
save_and_next(ls); /* skip delimiter */
seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
luaZ_bufflen(ls->buff) - 2);
}
static int llex (LexState *ls, SemInfo *seminfo) {
luaZ_resetbuffer(ls->buff);
for (;;) {
switch (ls->current) {
case '\n': case '\r': { /* line breaks */
inclinenumber(ls);
break;
}
case ' ': case '\f': case '\t': case '\v': { /* spaces */
next(ls);
break;
}
case '-': { /* '-' or '--' (comment) */
next(ls);
if (ls->current != '-') return '-';
/* else is a comment */
next(ls);
if (ls->current == '[') { /* long comment? */
size_t sep = skip_sep(ls);
luaZ_resetbuffer(ls->buff); /* 'skip_sep' may dirty the buffer */
if (sep >= 2) {
read_long_string(ls, NULL, sep); /* skip long comment */
luaZ_resetbuffer(ls->buff); /* previous call may dirty the buff. */
break;
}
}
/* else short comment */
while (!currIsNewline(ls) && ls->current != EOZ)
next(ls); /* skip until end of line (or end of file) */
break;
}
case '[': { /* long string or simply '[' */
size_t sep = skip_sep(ls);
if (sep >= 2) {
read_long_string(ls, seminfo, sep);
return TK_STRING;
}
else if (sep == 0) /* '[=...' missing second bracket? */
lexerror(ls, "invalid long string delimiter", TK_STRING);
return '[';
}
case '=': {
next(ls);
if (check_next1(ls, '=')) return TK_EQ; /* '==' */
else return '=';
}
case '<': {
next(ls);
if (check_next1(ls, '=')) return TK_LE; /* '<=' */
else if (check_next1(ls, '<')) return TK_SHL; /* '<<' */
else return '<';
}
case '>': {
next(ls);
if (check_next1(ls, '=')) return TK_GE; /* '>=' */
else if (check_next1(ls, '>')) return TK_SHR; /* '>>' */
else return '>';
}
case '/': {
next(ls);
if (check_next1(ls, '/')) return TK_IDIV; /* '//' */
else return '/';
}
case '~': {
next(ls);
if (check_next1(ls, '=')) return TK_NE; /* '~=' */
else return '~';
}
case ':': {
next(ls);
if (check_next1(ls, ':')) return TK_DBCOLON; /* '::' */
else return ':';
}
case '"': case '\'': { /* short literal strings */
read_string(ls, ls->current, seminfo);
return TK_STRING;
}
case '.': { /* '.', '..', '...', or number */
save_and_next(ls);
if (check_next1(ls, '.')) {
if (check_next1(ls, '.'))
return TK_DOTS; /* '...' */
else return TK_CONCAT; /* '..' */
}
else if (!lisdigit(ls->current)) return '.';
else return read_numeral(ls, seminfo);
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
return read_numeral(ls, seminfo);
}
case EOZ: {
return TK_EOS;
}
default: {
if (lislalpha(ls->current)) { /* identifier or reserved word? */
TString *ts;
do {
save_and_next(ls);
} while (lislalnum(ls->current));
ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
luaZ_bufflen(ls->buff));
seminfo->ts = ts;
if (isreserved(ts)) /* reserved word? */
return ts->extra - 1 + FIRST_RESERVED;
else {
return TK_NAME;
}
}
else { /* single-char tokens ('+', '*', '%', '{', '}', ...) */
int c = ls->current;
next(ls);
return c;
}
}
}
}
}
void luaX_next (LexState *ls) {
ls->lastline = ls->linenumber;
if (ls->lookahead.token != TK_EOS) { /* is there a look-ahead token? */
ls->t = ls->lookahead; /* use this one */
ls->lookahead.token = TK_EOS; /* and discharge it */
}
else
ls->t.token = llex(ls, &ls->t.seminfo); /* read next token */
}
int luaX_lookahead (LexState *ls) {
lua_assert(ls->lookahead.token == TK_EOS);
ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
return ls->lookahead.token;
}

91
lua-5.4.7/src/llex.h Normal file
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/*
** $Id: llex.h $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/
#ifndef llex_h
#define llex_h
#include <limits.h>
#include "lobject.h"
#include "lzio.h"
/*
** Single-char tokens (terminal symbols) are represented by their own
** numeric code. Other tokens start at the following value.
*/
#define FIRST_RESERVED (UCHAR_MAX + 1)
#if !defined(LUA_ENV)
#define LUA_ENV "_ENV"
#endif
/*
* WARNING: if you change the order of this enumeration,
* grep "ORDER RESERVED"
*/
enum RESERVED {
/* terminal symbols denoted by reserved words */
TK_AND = FIRST_RESERVED, TK_BREAK,
TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
/* other terminal symbols */
TK_IDIV, TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE,
TK_SHL, TK_SHR,
TK_DBCOLON, TK_EOS,
TK_FLT, TK_INT, TK_NAME, TK_STRING
};
/* number of reserved words */
#define NUM_RESERVED (cast_int(TK_WHILE-FIRST_RESERVED + 1))
typedef union {
lua_Number r;
lua_Integer i;
TString *ts;
} SemInfo; /* semantics information */
typedef struct Token {
int token;
SemInfo seminfo;
} Token;
/* state of the lexer plus state of the parser when shared by all
functions */
typedef struct LexState {
int current; /* current character (charint) */
int linenumber; /* input line counter */
int lastline; /* line of last token 'consumed' */
Token t; /* current token */
Token lookahead; /* look ahead token */
struct FuncState *fs; /* current function (parser) */
struct lua_State *L;
ZIO *z; /* input stream */
Mbuffer *buff; /* buffer for tokens */
Table *h; /* to avoid collection/reuse strings */
struct Dyndata *dyd; /* dynamic structures used by the parser */
TString *source; /* current source name */
TString *envn; /* environment variable name */
} LexState;
LUAI_FUNC void luaX_init (lua_State *L);
LUAI_FUNC void luaX_setinput (lua_State *L, LexState *ls, ZIO *z,
TString *source, int firstchar);
LUAI_FUNC TString *luaX_newstring (LexState *ls, const char *str, size_t l);
LUAI_FUNC void luaX_next (LexState *ls);
LUAI_FUNC int luaX_lookahead (LexState *ls);
LUAI_FUNC l_noret luaX_syntaxerror (LexState *ls, const char *s);
LUAI_FUNC const char *luaX_token2str (LexState *ls, int token);
#endif

380
lua-5.4.7/src/llimits.h Normal file
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/*
** $Id: llimits.h $
** Limits, basic types, and some other 'installation-dependent' definitions
** See Copyright Notice in lua.h
*/
#ifndef llimits_h
#define llimits_h
#include <limits.h>
#include <stddef.h>
#include "lua.h"
/*
** 'lu_mem' and 'l_mem' are unsigned/signed integers big enough to count
** the total memory used by Lua (in bytes). Usually, 'size_t' and
** 'ptrdiff_t' should work, but we use 'long' for 16-bit machines.
*/
#if defined(LUAI_MEM) /* { external definitions? */
typedef LUAI_UMEM lu_mem;
typedef LUAI_MEM l_mem;
#elif LUAI_IS32INT /* }{ */
typedef size_t lu_mem;
typedef ptrdiff_t l_mem;
#else /* 16-bit ints */ /* }{ */
typedef unsigned long lu_mem;
typedef long l_mem;
#endif /* } */
/* chars used as small naturals (so that 'char' is reserved for characters) */
typedef unsigned char lu_byte;
typedef signed char ls_byte;
/* maximum value for size_t */
#define MAX_SIZET ((size_t)(~(size_t)0))
/* maximum size visible for Lua (must be representable in a lua_Integer) */
#define MAX_SIZE (sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
: (size_t)(LUA_MAXINTEGER))
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0))
#define MAX_LMEM ((l_mem)(MAX_LUMEM >> 1))
#define MAX_INT INT_MAX /* maximum value of an int */
/*
** floor of the log2 of the maximum signed value for integral type 't'.
** (That is, maximum 'n' such that '2^n' fits in the given signed type.)
*/
#define log2maxs(t) (sizeof(t) * 8 - 2)
/*
** test whether an unsigned value is a power of 2 (or zero)
*/
#define ispow2(x) (((x) & ((x) - 1)) == 0)
/* number of chars of a literal string without the ending \0 */
#define LL(x) (sizeof(x)/sizeof(char) - 1)
/*
** conversion of pointer to unsigned integer: this is for hashing only;
** there is no problem if the integer cannot hold the whole pointer
** value. (In strict ISO C this may cause undefined behavior, but no
** actual machine seems to bother.)
*/
#if !defined(LUA_USE_C89) && defined(__STDC_VERSION__) && \
__STDC_VERSION__ >= 199901L
#include <stdint.h>
#if defined(UINTPTR_MAX) /* even in C99 this type is optional */
#define L_P2I uintptr_t
#else /* no 'intptr'? */
#define L_P2I uintmax_t /* use the largest available integer */
#endif
#else /* C89 option */
#define L_P2I size_t
#endif
#define point2uint(p) ((unsigned int)((L_P2I)(p) & UINT_MAX))
/* types of 'usual argument conversions' for lua_Number and lua_Integer */
typedef LUAI_UACNUMBER l_uacNumber;
typedef LUAI_UACINT l_uacInt;
/*
** Internal assertions for in-house debugging
*/
#if defined LUAI_ASSERT
#undef NDEBUG
#include <assert.h>
#define lua_assert(c) assert(c)
#endif
#if defined(lua_assert)
#define check_exp(c,e) (lua_assert(c), (e))
/* to avoid problems with conditions too long */
#define lua_longassert(c) ((c) ? (void)0 : lua_assert(0))
#else
#define lua_assert(c) ((void)0)
#define check_exp(c,e) (e)
#define lua_longassert(c) ((void)0)
#endif
/*
** assertion for checking API calls
*/
#if !defined(luai_apicheck)
#define luai_apicheck(l,e) ((void)l, lua_assert(e))
#endif
#define api_check(l,e,msg) luai_apicheck(l,(e) && msg)
/* macro to avoid warnings about unused variables */
#if !defined(UNUSED)
#define UNUSED(x) ((void)(x))
#endif
/* type casts (a macro highlights casts in the code) */
#define cast(t, exp) ((t)(exp))
#define cast_void(i) cast(void, (i))
#define cast_voidp(i) cast(void *, (i))
#define cast_num(i) cast(lua_Number, (i))
#define cast_int(i) cast(int, (i))
#define cast_uint(i) cast(unsigned int, (i))
#define cast_byte(i) cast(lu_byte, (i))
#define cast_uchar(i) cast(unsigned char, (i))
#define cast_char(i) cast(char, (i))
#define cast_charp(i) cast(char *, (i))
#define cast_sizet(i) cast(size_t, (i))
/* cast a signed lua_Integer to lua_Unsigned */
#if !defined(l_castS2U)
#define l_castS2U(i) ((lua_Unsigned)(i))
#endif
/*
** cast a lua_Unsigned to a signed lua_Integer; this cast is
** not strict ISO C, but two-complement architectures should
** work fine.
*/
#if !defined(l_castU2S)
#define l_castU2S(i) ((lua_Integer)(i))
#endif
/*
** non-return type
*/
#if !defined(l_noret)
#if defined(__GNUC__)
#define l_noret void __attribute__((noreturn))
#elif defined(_MSC_VER) && _MSC_VER >= 1200
#define l_noret void __declspec(noreturn)
#else
#define l_noret void
#endif
#endif
/*
** Inline functions
*/
#if !defined(LUA_USE_C89)
#define l_inline inline
#elif defined(__GNUC__)
#define l_inline __inline__
#else
#define l_inline /* empty */
#endif
#define l_sinline static l_inline
/*
** type for virtual-machine instructions;
** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
*/
#if LUAI_IS32INT
typedef unsigned int l_uint32;
#else
typedef unsigned long l_uint32;
#endif
typedef l_uint32 Instruction;
/*
** Maximum length for short strings, that is, strings that are
** internalized. (Cannot be smaller than reserved words or tags for
** metamethods, as these strings must be internalized;
** #("function") = 8, #("__newindex") = 10.)
*/
#if !defined(LUAI_MAXSHORTLEN)
#define LUAI_MAXSHORTLEN 40
#endif
/*
** Initial size for the string table (must be power of 2).
** The Lua core alone registers ~50 strings (reserved words +
** metaevent keys + a few others). Libraries would typically add
** a few dozens more.
*/
#if !defined(MINSTRTABSIZE)
#define MINSTRTABSIZE 128
#endif
/*
** Size of cache for strings in the API. 'N' is the number of
** sets (better be a prime) and "M" is the size of each set (M == 1
** makes a direct cache.)
*/
#if !defined(STRCACHE_N)
#define STRCACHE_N 53
#define STRCACHE_M 2
#endif
/* minimum size for string buffer */
#if !defined(LUA_MINBUFFER)
#define LUA_MINBUFFER 32
#endif
/*
** Maximum depth for nested C calls, syntactical nested non-terminals,
** and other features implemented through recursion in C. (Value must
** fit in a 16-bit unsigned integer. It must also be compatible with
** the size of the C stack.)
*/
#if !defined(LUAI_MAXCCALLS)
#define LUAI_MAXCCALLS 200
#endif
/*
** macros that are executed whenever program enters the Lua core
** ('lua_lock') and leaves the core ('lua_unlock')
*/
#if !defined(lua_lock)
#define lua_lock(L) ((void) 0)
#define lua_unlock(L) ((void) 0)
#endif
/*
** macro executed during Lua functions at points where the
** function can yield.
*/
#if !defined(luai_threadyield)
#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
#endif
/*
** these macros allow user-specific actions when a thread is
** created/deleted/resumed/yielded.
*/
#if !defined(luai_userstateopen)
#define luai_userstateopen(L) ((void)L)
#endif
#if !defined(luai_userstateclose)
#define luai_userstateclose(L) ((void)L)
#endif
#if !defined(luai_userstatethread)
#define luai_userstatethread(L,L1) ((void)L)
#endif
#if !defined(luai_userstatefree)
#define luai_userstatefree(L,L1) ((void)L)
#endif
#if !defined(luai_userstateresume)
#define luai_userstateresume(L,n) ((void)L)
#endif
#if !defined(luai_userstateyield)
#define luai_userstateyield(L,n) ((void)L)
#endif
/*
** The luai_num* macros define the primitive operations over numbers.
*/
/* floor division (defined as 'floor(a/b)') */
#if !defined(luai_numidiv)
#define luai_numidiv(L,a,b) ((void)L, l_floor(luai_numdiv(L,a,b)))
#endif
/* float division */
#if !defined(luai_numdiv)
#define luai_numdiv(L,a,b) ((a)/(b))
#endif
/*
** modulo: defined as 'a - floor(a/b)*b'; the direct computation
** using this definition has several problems with rounding errors,
** so it is better to use 'fmod'. 'fmod' gives the result of
** 'a - trunc(a/b)*b', and therefore must be corrected when
** 'trunc(a/b) ~= floor(a/b)'. That happens when the division has a
** non-integer negative result: non-integer result is equivalent to
** a non-zero remainder 'm'; negative result is equivalent to 'a' and
** 'b' with different signs, or 'm' and 'b' with different signs
** (as the result 'm' of 'fmod' has the same sign of 'a').
*/
#if !defined(luai_nummod)
#define luai_nummod(L,a,b,m) \
{ (void)L; (m) = l_mathop(fmod)(a,b); \
if (((m) > 0) ? (b) < 0 : ((m) < 0 && (b) > 0)) (m) += (b); }
#endif
/* exponentiation */
#if !defined(luai_numpow)
#define luai_numpow(L,a,b) \
((void)L, (b == 2) ? (a)*(a) : l_mathop(pow)(a,b))
#endif
/* the others are quite standard operations */
#if !defined(luai_numadd)
#define luai_numadd(L,a,b) ((a)+(b))
#define luai_numsub(L,a,b) ((a)-(b))
#define luai_nummul(L,a,b) ((a)*(b))
#define luai_numunm(L,a) (-(a))
#define luai_numeq(a,b) ((a)==(b))
#define luai_numlt(a,b) ((a)<(b))
#define luai_numle(a,b) ((a)<=(b))
#define luai_numgt(a,b) ((a)>(b))
#define luai_numge(a,b) ((a)>=(b))
#define luai_numisnan(a) (!luai_numeq((a), (a)))
#endif
/*
** macro to control inclusion of some hard tests on stack reallocation
*/
#if !defined(HARDSTACKTESTS)
#define condmovestack(L,pre,pos) ((void)0)
#else
/* realloc stack keeping its size */
#define condmovestack(L,pre,pos) \
{ int sz_ = stacksize(L); pre; luaD_reallocstack((L), sz_, 0); pos; }
#endif
#if !defined(HARDMEMTESTS)
#define condchangemem(L,pre,pos) ((void)0)
#else
#define condchangemem(L,pre,pos) \
{ if (gcrunning(G(L))) { pre; luaC_fullgc(L, 0); pos; } }
#endif
#endif

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/*
** $Id: lmathlib.c $
** Standard mathematical library
** See Copyright Notice in lua.h
*/
#define lmathlib_c
#define LUA_LIB
#include "lprefix.h"
#include <float.h>
#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <time.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
#undef PI
#define PI (l_mathop(3.141592653589793238462643383279502884))
static int math_abs (lua_State *L) {
if (lua_isinteger(L, 1)) {
lua_Integer n = lua_tointeger(L, 1);
if (n < 0) n = (lua_Integer)(0u - (lua_Unsigned)n);
lua_pushinteger(L, n);
}
else
lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
return 1;
}
static int math_sin (lua_State *L) {
lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
return 1;
}
static int math_cos (lua_State *L) {
lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tan (lua_State *L) {
lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
return 1;
}
static int math_asin (lua_State *L) {
lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
return 1;
}
static int math_acos (lua_State *L) {
lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
return 1;
}
static int math_atan (lua_State *L) {
lua_Number y = luaL_checknumber(L, 1);
lua_Number x = luaL_optnumber(L, 2, 1);
lua_pushnumber(L, l_mathop(atan2)(y, x));
return 1;
}
static int math_toint (lua_State *L) {
int valid;
lua_Integer n = lua_tointegerx(L, 1, &valid);
if (l_likely(valid))
lua_pushinteger(L, n);
else {
luaL_checkany(L, 1);
luaL_pushfail(L); /* value is not convertible to integer */
}
return 1;
}
static void pushnumint (lua_State *L, lua_Number d) {
lua_Integer n;
if (lua_numbertointeger(d, &n)) /* does 'd' fit in an integer? */
lua_pushinteger(L, n); /* result is integer */
else
lua_pushnumber(L, d); /* result is float */
}
static int math_floor (lua_State *L) {
if (lua_isinteger(L, 1))
lua_settop(L, 1); /* integer is its own floor */
else {
lua_Number d = l_mathop(floor)(luaL_checknumber(L, 1));
pushnumint(L, d);
}
return 1;
}
static int math_ceil (lua_State *L) {
if (lua_isinteger(L, 1))
lua_settop(L, 1); /* integer is its own ceil */
else {
lua_Number d = l_mathop(ceil)(luaL_checknumber(L, 1));
pushnumint(L, d);
}
return 1;
}
static int math_fmod (lua_State *L) {
if (lua_isinteger(L, 1) && lua_isinteger(L, 2)) {
lua_Integer d = lua_tointeger(L, 2);
if ((lua_Unsigned)d + 1u <= 1u) { /* special cases: -1 or 0 */
luaL_argcheck(L, d != 0, 2, "zero");
lua_pushinteger(L, 0); /* avoid overflow with 0x80000... / -1 */
}
else
lua_pushinteger(L, lua_tointeger(L, 1) % d);
}
else
lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
}
/*
** next function does not use 'modf', avoiding problems with 'double*'
** (which is not compatible with 'float*') when lua_Number is not
** 'double'.
*/
static int math_modf (lua_State *L) {
if (lua_isinteger(L ,1)) {
lua_settop(L, 1); /* number is its own integer part */
lua_pushnumber(L, 0); /* no fractional part */
}
else {
lua_Number n = luaL_checknumber(L, 1);
/* integer part (rounds toward zero) */
lua_Number ip = (n < 0) ? l_mathop(ceil)(n) : l_mathop(floor)(n);
pushnumint(L, ip);
/* fractional part (test needed for inf/-inf) */
lua_pushnumber(L, (n == ip) ? l_mathop(0.0) : (n - ip));
}
return 2;
}
static int math_sqrt (lua_State *L) {
lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
return 1;
}
static int math_ult (lua_State *L) {
lua_Integer a = luaL_checkinteger(L, 1);
lua_Integer b = luaL_checkinteger(L, 2);
lua_pushboolean(L, (lua_Unsigned)a < (lua_Unsigned)b);
return 1;
}
static int math_log (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
lua_Number res;
if (lua_isnoneornil(L, 2))
res = l_mathop(log)(x);
else {
lua_Number base = luaL_checknumber(L, 2);
#if !defined(LUA_USE_C89)
if (base == l_mathop(2.0))
res = l_mathop(log2)(x);
else
#endif
if (base == l_mathop(10.0))
res = l_mathop(log10)(x);
else
res = l_mathop(log)(x)/l_mathop(log)(base);
}
lua_pushnumber(L, res);
return 1;
}
static int math_exp (lua_State *L) {
lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
return 1;
}
static int math_deg (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1) * (l_mathop(180.0) / PI));
return 1;
}
static int math_rad (lua_State *L) {
lua_pushnumber(L, luaL_checknumber(L, 1) * (PI / l_mathop(180.0)));
return 1;
}
static int math_min (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int imin = 1; /* index of current minimum value */
int i;
luaL_argcheck(L, n >= 1, 1, "value expected");
for (i = 2; i <= n; i++) {
if (lua_compare(L, i, imin, LUA_OPLT))
imin = i;
}
lua_pushvalue(L, imin);
return 1;
}
static int math_max (lua_State *L) {
int n = lua_gettop(L); /* number of arguments */
int imax = 1; /* index of current maximum value */
int i;
luaL_argcheck(L, n >= 1, 1, "value expected");
for (i = 2; i <= n; i++) {
if (lua_compare(L, imax, i, LUA_OPLT))
imax = i;
}
lua_pushvalue(L, imax);
return 1;
}
static int math_type (lua_State *L) {
if (lua_type(L, 1) == LUA_TNUMBER)
lua_pushstring(L, (lua_isinteger(L, 1)) ? "integer" : "float");
else {
luaL_checkany(L, 1);
luaL_pushfail(L);
}
return 1;
}
/*
** {==================================================================
** Pseudo-Random Number Generator based on 'xoshiro256**'.
** ===================================================================
*/
/*
** This code uses lots of shifts. ANSI C does not allow shifts greater
** than or equal to the width of the type being shifted, so some shifts
** are written in convoluted ways to match that restriction. For
** preprocessor tests, it assumes a width of 32 bits, so the maximum
** shift there is 31 bits.
*/
/* number of binary digits in the mantissa of a float */
#define FIGS l_floatatt(MANT_DIG)
#if FIGS > 64
/* there are only 64 random bits; use them all */
#undef FIGS
#define FIGS 64
#endif
/*
** LUA_RAND32 forces the use of 32-bit integers in the implementation
** of the PRN generator (mainly for testing).
*/
#if !defined(LUA_RAND32) && !defined(Rand64)
/* try to find an integer type with at least 64 bits */
#if ((ULONG_MAX >> 31) >> 31) >= 3
/* 'long' has at least 64 bits */
#define Rand64 unsigned long
#define SRand64 long
#elif !defined(LUA_USE_C89) && defined(LLONG_MAX)
/* there is a 'long long' type (which must have at least 64 bits) */
#define Rand64 unsigned long long
#define SRand64 long long
#elif ((LUA_MAXUNSIGNED >> 31) >> 31) >= 3
/* 'lua_Unsigned' has at least 64 bits */
#define Rand64 lua_Unsigned
#define SRand64 lua_Integer
#endif
#endif
#if defined(Rand64) /* { */
/*
** Standard implementation, using 64-bit integers.
** If 'Rand64' has more than 64 bits, the extra bits do not interfere
** with the 64 initial bits, except in a right shift. Moreover, the
** final result has to discard the extra bits.
*/
/* avoid using extra bits when needed */
#define trim64(x) ((x) & 0xffffffffffffffffu)
/* rotate left 'x' by 'n' bits */
static Rand64 rotl (Rand64 x, int n) {
return (x << n) | (trim64(x) >> (64 - n));
}
static Rand64 nextrand (Rand64 *state) {
Rand64 state0 = state[0];
Rand64 state1 = state[1];
Rand64 state2 = state[2] ^ state0;
Rand64 state3 = state[3] ^ state1;
Rand64 res = rotl(state1 * 5, 7) * 9;
state[0] = state0 ^ state3;
state[1] = state1 ^ state2;
state[2] = state2 ^ (state1 << 17);
state[3] = rotl(state3, 45);
return res;
}
/*
** Convert bits from a random integer into a float in the
** interval [0,1), getting the higher FIG bits from the
** random unsigned integer and converting that to a float.
** Some old Microsoft compilers cannot cast an unsigned long
** to a floating-point number, so we use a signed long as an
** intermediary. When lua_Number is float or double, the shift ensures
** that 'sx' is non negative; in that case, a good compiler will remove
** the correction.
*/
/* must throw out the extra (64 - FIGS) bits */
#define shift64_FIG (64 - FIGS)
/* 2^(-FIGS) == 2^-1 / 2^(FIGS-1) */
#define scaleFIG (l_mathop(0.5) / ((Rand64)1 << (FIGS - 1)))
static lua_Number I2d (Rand64 x) {
SRand64 sx = (SRand64)(trim64(x) >> shift64_FIG);
lua_Number res = (lua_Number)(sx) * scaleFIG;
if (sx < 0)
res += l_mathop(1.0); /* correct the two's complement if negative */
lua_assert(0 <= res && res < 1);
return res;
}
/* convert a 'Rand64' to a 'lua_Unsigned' */
#define I2UInt(x) ((lua_Unsigned)trim64(x))
/* convert a 'lua_Unsigned' to a 'Rand64' */
#define Int2I(x) ((Rand64)(x))
#else /* no 'Rand64' }{ */
/* get an integer with at least 32 bits */
#if LUAI_IS32INT
typedef unsigned int lu_int32;
#else
typedef unsigned long lu_int32;
#endif
/*
** Use two 32-bit integers to represent a 64-bit quantity.
*/
typedef struct Rand64 {
lu_int32 h; /* higher half */
lu_int32 l; /* lower half */
} Rand64;
/*
** If 'lu_int32' has more than 32 bits, the extra bits do not interfere
** with the 32 initial bits, except in a right shift and comparisons.
** Moreover, the final result has to discard the extra bits.
*/
/* avoid using extra bits when needed */
#define trim32(x) ((x) & 0xffffffffu)
/*
** basic operations on 'Rand64' values
*/
/* build a new Rand64 value */
static Rand64 packI (lu_int32 h, lu_int32 l) {
Rand64 result;
result.h = h;
result.l = l;
return result;
}
/* return i << n */
static Rand64 Ishl (Rand64 i, int n) {
lua_assert(n > 0 && n < 32);
return packI((i.h << n) | (trim32(i.l) >> (32 - n)), i.l << n);
}
/* i1 ^= i2 */
static void Ixor (Rand64 *i1, Rand64 i2) {
i1->h ^= i2.h;
i1->l ^= i2.l;
}
/* return i1 + i2 */
static Rand64 Iadd (Rand64 i1, Rand64 i2) {
Rand64 result = packI(i1.h + i2.h, i1.l + i2.l);
if (trim32(result.l) < trim32(i1.l)) /* carry? */
result.h++;
return result;
}
/* return i * 5 */
static Rand64 times5 (Rand64 i) {
return Iadd(Ishl(i, 2), i); /* i * 5 == (i << 2) + i */
}
/* return i * 9 */
static Rand64 times9 (Rand64 i) {
return Iadd(Ishl(i, 3), i); /* i * 9 == (i << 3) + i */
}
/* return 'i' rotated left 'n' bits */
static Rand64 rotl (Rand64 i, int n) {
lua_assert(n > 0 && n < 32);
return packI((i.h << n) | (trim32(i.l) >> (32 - n)),
(trim32(i.h) >> (32 - n)) | (i.l << n));
}
/* for offsets larger than 32, rotate right by 64 - offset */
static Rand64 rotl1 (Rand64 i, int n) {
lua_assert(n > 32 && n < 64);
n = 64 - n;
return packI((trim32(i.h) >> n) | (i.l << (32 - n)),
(i.h << (32 - n)) | (trim32(i.l) >> n));
}
/*
** implementation of 'xoshiro256**' algorithm on 'Rand64' values
*/
static Rand64 nextrand (Rand64 *state) {
Rand64 res = times9(rotl(times5(state[1]), 7));
Rand64 t = Ishl(state[1], 17);
Ixor(&state[2], state[0]);
Ixor(&state[3], state[1]);
Ixor(&state[1], state[2]);
Ixor(&state[0], state[3]);
Ixor(&state[2], t);
state[3] = rotl1(state[3], 45);
return res;
}
/*
** Converts a 'Rand64' into a float.
*/
/* an unsigned 1 with proper type */
#define UONE ((lu_int32)1)
#if FIGS <= 32
/* 2^(-FIGS) */
#define scaleFIG (l_mathop(0.5) / (UONE << (FIGS - 1)))
/*
** get up to 32 bits from higher half, shifting right to
** throw out the extra bits.
*/
static lua_Number I2d (Rand64 x) {
lua_Number h = (lua_Number)(trim32(x.h) >> (32 - FIGS));
return h * scaleFIG;
}
#else /* 32 < FIGS <= 64 */
/* 2^(-FIGS) = 1.0 / 2^30 / 2^3 / 2^(FIGS-33) */
#define scaleFIG \
(l_mathop(1.0) / (UONE << 30) / l_mathop(8.0) / (UONE << (FIGS - 33)))
/*
** use FIGS - 32 bits from lower half, throwing out the other
** (32 - (FIGS - 32)) = (64 - FIGS) bits
*/
#define shiftLOW (64 - FIGS)
/*
** higher 32 bits go after those (FIGS - 32) bits: shiftHI = 2^(FIGS - 32)
*/
#define shiftHI ((lua_Number)(UONE << (FIGS - 33)) * l_mathop(2.0))
static lua_Number I2d (Rand64 x) {
lua_Number h = (lua_Number)trim32(x.h) * shiftHI;
lua_Number l = (lua_Number)(trim32(x.l) >> shiftLOW);
return (h + l) * scaleFIG;
}
#endif
/* convert a 'Rand64' to a 'lua_Unsigned' */
static lua_Unsigned I2UInt (Rand64 x) {
return (((lua_Unsigned)trim32(x.h) << 31) << 1) | (lua_Unsigned)trim32(x.l);
}
/* convert a 'lua_Unsigned' to a 'Rand64' */
static Rand64 Int2I (lua_Unsigned n) {
return packI((lu_int32)((n >> 31) >> 1), (lu_int32)n);
}
#endif /* } */
/*
** A state uses four 'Rand64' values.
*/
typedef struct {
Rand64 s[4];
} RanState;
/*
** Project the random integer 'ran' into the interval [0, n].
** Because 'ran' has 2^B possible values, the projection can only be
** uniform when the size of the interval is a power of 2 (exact
** division). Otherwise, to get a uniform projection into [0, n], we
** first compute 'lim', the smallest Mersenne number not smaller than
** 'n'. We then project 'ran' into the interval [0, lim]. If the result
** is inside [0, n], we are done. Otherwise, we try with another 'ran',
** until we have a result inside the interval.
*/
static lua_Unsigned project (lua_Unsigned ran, lua_Unsigned n,
RanState *state) {
if ((n & (n + 1)) == 0) /* is 'n + 1' a power of 2? */
return ran & n; /* no bias */
else {
lua_Unsigned lim = n;
/* compute the smallest (2^b - 1) not smaller than 'n' */
lim |= (lim >> 1);
lim |= (lim >> 2);
lim |= (lim >> 4);
lim |= (lim >> 8);
lim |= (lim >> 16);
#if (LUA_MAXUNSIGNED >> 31) >= 3
lim |= (lim >> 32); /* integer type has more than 32 bits */
#endif
lua_assert((lim & (lim + 1)) == 0 /* 'lim + 1' is a power of 2, */
&& lim >= n /* not smaller than 'n', */
&& (lim >> 1) < n); /* and it is the smallest one */
while ((ran &= lim) > n) /* project 'ran' into [0..lim] */
ran = I2UInt(nextrand(state->s)); /* not inside [0..n]? try again */
return ran;
}
}
static int math_random (lua_State *L) {
lua_Integer low, up;
lua_Unsigned p;
RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
Rand64 rv = nextrand(state->s); /* next pseudo-random value */
switch (lua_gettop(L)) { /* check number of arguments */
case 0: { /* no arguments */
lua_pushnumber(L, I2d(rv)); /* float between 0 and 1 */
return 1;
}
case 1: { /* only upper limit */
low = 1;
up = luaL_checkinteger(L, 1);
if (up == 0) { /* single 0 as argument? */
lua_pushinteger(L, I2UInt(rv)); /* full random integer */
return 1;
}
break;
}
case 2: { /* lower and upper limits */
low = luaL_checkinteger(L, 1);
up = luaL_checkinteger(L, 2);
break;
}
default: return luaL_error(L, "wrong number of arguments");
}
/* random integer in the interval [low, up] */
luaL_argcheck(L, low <= up, 1, "interval is empty");
/* project random integer into the interval [0, up - low] */
p = project(I2UInt(rv), (lua_Unsigned)up - (lua_Unsigned)low, state);
lua_pushinteger(L, p + (lua_Unsigned)low);
return 1;
}
static void setseed (lua_State *L, Rand64 *state,
lua_Unsigned n1, lua_Unsigned n2) {
int i;
state[0] = Int2I(n1);
state[1] = Int2I(0xff); /* avoid a zero state */
state[2] = Int2I(n2);
state[3] = Int2I(0);
for (i = 0; i < 16; i++)
nextrand(state); /* discard initial values to "spread" seed */
lua_pushinteger(L, n1);
lua_pushinteger(L, n2);
}
/*
** Set a "random" seed. To get some randomness, use the current time
** and the address of 'L' (in case the machine does address space layout
** randomization).
*/
static void randseed (lua_State *L, RanState *state) {
lua_Unsigned seed1 = (lua_Unsigned)time(NULL);
lua_Unsigned seed2 = (lua_Unsigned)(size_t)L;
setseed(L, state->s, seed1, seed2);
}
static int math_randomseed (lua_State *L) {
RanState *state = (RanState *)lua_touserdata(L, lua_upvalueindex(1));
if (lua_isnone(L, 1)) {
randseed(L, state);
}
else {
lua_Integer n1 = luaL_checkinteger(L, 1);
lua_Integer n2 = luaL_optinteger(L, 2, 0);
setseed(L, state->s, n1, n2);
}
return 2; /* return seeds */
}
static const luaL_Reg randfuncs[] = {
{"random", math_random},
{"randomseed", math_randomseed},
{NULL, NULL}
};
/*
** Register the random functions and initialize their state.
*/
static void setrandfunc (lua_State *L) {
RanState *state = (RanState *)lua_newuserdatauv(L, sizeof(RanState), 0);
randseed(L, state); /* initialize with a "random" seed */
lua_pop(L, 2); /* remove pushed seeds */
luaL_setfuncs(L, randfuncs, 1);
}
/* }================================================================== */
/*
** {==================================================================
** Deprecated functions (for compatibility only)
** ===================================================================
*/
#if defined(LUA_COMPAT_MATHLIB)
static int math_cosh (lua_State *L) {
lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_sinh (lua_State *L) {
lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_tanh (lua_State *L) {
lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
return 1;
}
static int math_pow (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
lua_Number y = luaL_checknumber(L, 2);
lua_pushnumber(L, l_mathop(pow)(x, y));
return 1;
}
static int math_frexp (lua_State *L) {
int e;
lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e);
return 2;
}
static int math_ldexp (lua_State *L) {
lua_Number x = luaL_checknumber(L, 1);
int ep = (int)luaL_checkinteger(L, 2);
lua_pushnumber(L, l_mathop(ldexp)(x, ep));
return 1;
}
static int math_log10 (lua_State *L) {
lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
return 1;
}
#endif
/* }================================================================== */
static const luaL_Reg mathlib[] = {
{"abs", math_abs},
{"acos", math_acos},
{"asin", math_asin},
{"atan", math_atan},
{"ceil", math_ceil},
{"cos", math_cos},
{"deg", math_deg},
{"exp", math_exp},
{"tointeger", math_toint},
{"floor", math_floor},
{"fmod", math_fmod},
{"ult", math_ult},
{"log", math_log},
{"max", math_max},
{"min", math_min},
{"modf", math_modf},
{"rad", math_rad},
{"sin", math_sin},
{"sqrt", math_sqrt},
{"tan", math_tan},
{"type", math_type},
#if defined(LUA_COMPAT_MATHLIB)
{"atan2", math_atan},
{"cosh", math_cosh},
{"sinh", math_sinh},
{"tanh", math_tanh},
{"pow", math_pow},
{"frexp", math_frexp},
{"ldexp", math_ldexp},
{"log10", math_log10},
#endif
/* placeholders */
{"random", NULL},
{"randomseed", NULL},
{"pi", NULL},
{"huge", NULL},
{"maxinteger", NULL},
{"mininteger", NULL},
{NULL, NULL}
};
/*
** Open math library
*/
LUAMOD_API int luaopen_math (lua_State *L) {
luaL_newlib(L, mathlib);
lua_pushnumber(L, PI);
lua_setfield(L, -2, "pi");
lua_pushnumber(L, (lua_Number)HUGE_VAL);
lua_setfield(L, -2, "huge");
lua_pushinteger(L, LUA_MAXINTEGER);
lua_setfield(L, -2, "maxinteger");
lua_pushinteger(L, LUA_MININTEGER);
lua_setfield(L, -2, "mininteger");
setrandfunc(L);
return 1;
}

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/*
** $Id: lmem.c $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/
#define lmem_c
#define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
/*
** About the realloc function:
** void *frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
** ('osize' is the old size, 'nsize' is the new size)
**
** - frealloc(ud, p, x, 0) frees the block 'p' and returns NULL.
** Particularly, frealloc(ud, NULL, 0, 0) does nothing,
** which is equivalent to free(NULL) in ISO C.
**
** - frealloc(ud, NULL, x, s) creates a new block of size 's'
** (no matter 'x'). Returns NULL if it cannot create the new block.
**
** - otherwise, frealloc(ud, b, x, y) reallocates the block 'b' from
** size 'x' to size 'y'. Returns NULL if it cannot reallocate the
** block to the new size.
*/
/*
** Macro to call the allocation function.
*/
#define callfrealloc(g,block,os,ns) ((*g->frealloc)(g->ud, block, os, ns))
/*
** When an allocation fails, it will try again after an emergency
** collection, except when it cannot run a collection. The GC should
** not be called while the state is not fully built, as the collector
** is not yet fully initialized. Also, it should not be called when
** 'gcstopem' is true, because then the interpreter is in the middle of
** a collection step.
*/
#define cantryagain(g) (completestate(g) && !g->gcstopem)
#if defined(EMERGENCYGCTESTS)
/*
** First allocation will fail except when freeing a block (frees never
** fail) and when it cannot try again; this fail will trigger 'tryagain'
** and a full GC cycle at every allocation.
*/
static void *firsttry (global_State *g, void *block, size_t os, size_t ns) {
if (ns > 0 && cantryagain(g))
return NULL; /* fail */
else /* normal allocation */
return callfrealloc(g, block, os, ns);
}
#else
#define firsttry(g,block,os,ns) callfrealloc(g, block, os, ns)
#endif
/*
** {==================================================================
** Functions to allocate/deallocate arrays for the Parser
** ===================================================================
*/
/*
** Minimum size for arrays during parsing, to avoid overhead of
** reallocating to size 1, then 2, and then 4. All these arrays
** will be reallocated to exact sizes or erased when parsing ends.
*/
#define MINSIZEARRAY 4
void *luaM_growaux_ (lua_State *L, void *block, int nelems, int *psize,
int size_elems, int limit, const char *what) {
void *newblock;
int size = *psize;
if (nelems + 1 <= size) /* does one extra element still fit? */
return block; /* nothing to be done */
if (size >= limit / 2) { /* cannot double it? */
if (l_unlikely(size >= limit)) /* cannot grow even a little? */
luaG_runerror(L, "too many %s (limit is %d)", what, limit);
size = limit; /* still have at least one free place */
}
else {
size *= 2;
if (size < MINSIZEARRAY)
size = MINSIZEARRAY; /* minimum size */
}
lua_assert(nelems + 1 <= size && size <= limit);
/* 'limit' ensures that multiplication will not overflow */
newblock = luaM_saferealloc_(L, block, cast_sizet(*psize) * size_elems,
cast_sizet(size) * size_elems);
*psize = size; /* update only when everything else is OK */
return newblock;
}
/*
** In prototypes, the size of the array is also its number of
** elements (to save memory). So, if it cannot shrink an array
** to its number of elements, the only option is to raise an
** error.
*/
void *luaM_shrinkvector_ (lua_State *L, void *block, int *size,
int final_n, int size_elem) {
void *newblock;
size_t oldsize = cast_sizet((*size) * size_elem);
size_t newsize = cast_sizet(final_n * size_elem);
lua_assert(newsize <= oldsize);
newblock = luaM_saferealloc_(L, block, oldsize, newsize);
*size = final_n;
return newblock;
}
/* }================================================================== */
l_noret luaM_toobig (lua_State *L) {
luaG_runerror(L, "memory allocation error: block too big");
}
/*
** Free memory
*/
void luaM_free_ (lua_State *L, void *block, size_t osize) {
global_State *g = G(L);
lua_assert((osize == 0) == (block == NULL));
callfrealloc(g, block, osize, 0);
g->GCdebt -= osize;
}
/*
** In case of allocation fail, this function will do an emergency
** collection to free some memory and then try the allocation again.
*/
static void *tryagain (lua_State *L, void *block,
size_t osize, size_t nsize) {
global_State *g = G(L);
if (cantryagain(g)) {
luaC_fullgc(L, 1); /* try to free some memory... */
return callfrealloc(g, block, osize, nsize); /* try again */
}
else return NULL; /* cannot run an emergency collection */
}
/*
** Generic allocation routine.
*/
void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
void *newblock;
global_State *g = G(L);
lua_assert((osize == 0) == (block == NULL));
newblock = firsttry(g, block, osize, nsize);
if (l_unlikely(newblock == NULL && nsize > 0)) {
newblock = tryagain(L, block, osize, nsize);
if (newblock == NULL) /* still no memory? */
return NULL; /* do not update 'GCdebt' */
}
lua_assert((nsize == 0) == (newblock == NULL));
g->GCdebt = (g->GCdebt + nsize) - osize;
return newblock;
}
void *luaM_saferealloc_ (lua_State *L, void *block, size_t osize,
size_t nsize) {
void *newblock = luaM_realloc_(L, block, osize, nsize);
if (l_unlikely(newblock == NULL && nsize > 0)) /* allocation failed? */
luaM_error(L);
return newblock;
}
void *luaM_malloc_ (lua_State *L, size_t size, int tag) {
if (size == 0)
return NULL; /* that's all */
else {
global_State *g = G(L);
void *newblock = firsttry(g, NULL, tag, size);
if (l_unlikely(newblock == NULL)) {
newblock = tryagain(L, NULL, tag, size);
if (newblock == NULL)
luaM_error(L);
}
g->GCdebt += size;
return newblock;
}
}

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/*
** $Id: lmem.h $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/
#ifndef lmem_h
#define lmem_h
#include <stddef.h>
#include "llimits.h"
#include "lua.h"
#define luaM_error(L) luaD_throw(L, LUA_ERRMEM)
/*
** This macro tests whether it is safe to multiply 'n' by the size of
** type 't' without overflows. Because 'e' is always constant, it avoids
** the runtime division MAX_SIZET/(e).
** (The macro is somewhat complex to avoid warnings: The 'sizeof'
** comparison avoids a runtime comparison when overflow cannot occur.
** The compiler should be able to optimize the real test by itself, but
** when it does it, it may give a warning about "comparison is always
** false due to limited range of data type"; the +1 tricks the compiler,
** avoiding this warning but also this optimization.)
*/
#define luaM_testsize(n,e) \
(sizeof(n) >= sizeof(size_t) && cast_sizet((n)) + 1 > MAX_SIZET/(e))
#define luaM_checksize(L,n,e) \
(luaM_testsize(n,e) ? luaM_toobig(L) : cast_void(0))
/*
** Computes the minimum between 'n' and 'MAX_SIZET/sizeof(t)', so that
** the result is not larger than 'n' and cannot overflow a 'size_t'
** when multiplied by the size of type 't'. (Assumes that 'n' is an
** 'int' or 'unsigned int' and that 'int' is not larger than 'size_t'.)
*/
#define luaM_limitN(n,t) \
((cast_sizet(n) <= MAX_SIZET/sizeof(t)) ? (n) : \
cast_uint((MAX_SIZET/sizeof(t))))
/*
** Arrays of chars do not need any test
*/
#define luaM_reallocvchar(L,b,on,n) \
cast_charp(luaM_saferealloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
#define luaM_freemem(L, b, s) luaM_free_(L, (b), (s))
#define luaM_free(L, b) luaM_free_(L, (b), sizeof(*(b)))
#define luaM_freearray(L, b, n) luaM_free_(L, (b), (n)*sizeof(*(b)))
#define luaM_new(L,t) cast(t*, luaM_malloc_(L, sizeof(t), 0))
#define luaM_newvector(L,n,t) cast(t*, luaM_malloc_(L, (n)*sizeof(t), 0))
#define luaM_newvectorchecked(L,n,t) \
(luaM_checksize(L,n,sizeof(t)), luaM_newvector(L,n,t))
#define luaM_newobject(L,tag,s) luaM_malloc_(L, (s), tag)
#define luaM_growvector(L,v,nelems,size,t,limit,e) \
((v)=cast(t *, luaM_growaux_(L,v,nelems,&(size),sizeof(t), \
luaM_limitN(limit,t),e)))
#define luaM_reallocvector(L, v,oldn,n,t) \
(cast(t *, luaM_realloc_(L, v, cast_sizet(oldn) * sizeof(t), \
cast_sizet(n) * sizeof(t))))
#define luaM_shrinkvector(L,v,size,fs,t) \
((v)=cast(t *, luaM_shrinkvector_(L, v, &(size), fs, sizeof(t))))
LUAI_FUNC l_noret luaM_toobig (lua_State *L);
/* not to be called directly */
LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
size_t size);
LUAI_FUNC void *luaM_saferealloc_ (lua_State *L, void *block, size_t oldsize,
size_t size);
LUAI_FUNC void luaM_free_ (lua_State *L, void *block, size_t osize);
LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int nelems,
int *size, int size_elem, int limit,
const char *what);
LUAI_FUNC void *luaM_shrinkvector_ (lua_State *L, void *block, int *nelem,
int final_n, int size_elem);
LUAI_FUNC void *luaM_malloc_ (lua_State *L, size_t size, int tag);
#endif

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/*
** $Id: loadlib.c $
** Dynamic library loader for Lua
** See Copyright Notice in lua.h
**
** This module contains an implementation of loadlib for Unix systems
** that have dlfcn, an implementation for Windows, and a stub for other
** systems.
*/
#define loadlib_c
#define LUA_LIB
#include "lprefix.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/*
** LUA_CSUBSEP is the character that replaces dots in submodule names
** when searching for a C loader.
** LUA_LSUBSEP is the character that replaces dots in submodule names
** when searching for a Lua loader.
*/
#if !defined(LUA_CSUBSEP)
#define LUA_CSUBSEP LUA_DIRSEP
#endif
#if !defined(LUA_LSUBSEP)
#define LUA_LSUBSEP LUA_DIRSEP
#endif
/* prefix for open functions in C libraries */
#define LUA_POF "luaopen_"
/* separator for open functions in C libraries */
#define LUA_OFSEP "_"
/*
** key for table in the registry that keeps handles
** for all loaded C libraries
*/
static const char *const CLIBS = "_CLIBS";
#define LIB_FAIL "open"
#define setprogdir(L) ((void)0)
/*
** Special type equivalent to '(void*)' for functions in gcc
** (to suppress warnings when converting function pointers)
*/
typedef void (*voidf)(void);
/*
** system-dependent functions
*/
/*
** unload library 'lib'
*/
static void lsys_unloadlib (void *lib);
/*
** load C library in file 'path'. If 'seeglb', load with all names in
** the library global.
** Returns the library; in case of error, returns NULL plus an
** error string in the stack.
*/
static void *lsys_load (lua_State *L, const char *path, int seeglb);
/*
** Try to find a function named 'sym' in library 'lib'.
** Returns the function; in case of error, returns NULL plus an
** error string in the stack.
*/
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym);
#if defined(LUA_USE_DLOPEN) /* { */
/*
** {========================================================================
** This is an implementation of loadlib based on the dlfcn interface.
** The dlfcn interface is available in Linux, SunOS, Solaris, IRIX, FreeBSD,
** NetBSD, AIX 4.2, HPUX 11, and probably most other Unix flavors, at least
** as an emulation layer on top of native functions.
** =========================================================================
*/
#include <dlfcn.h>
/*
** Macro to convert pointer-to-void* to pointer-to-function. This cast
** is undefined according to ISO C, but POSIX assumes that it works.
** (The '__extension__' in gnu compilers is only to avoid warnings.)
*/
#if defined(__GNUC__)
#define cast_func(p) (__extension__ (lua_CFunction)(p))
#else
#define cast_func(p) ((lua_CFunction)(p))
#endif
static void lsys_unloadlib (void *lib) {
dlclose(lib);
}
static void *lsys_load (lua_State *L, const char *path, int seeglb) {
void *lib = dlopen(path, RTLD_NOW | (seeglb ? RTLD_GLOBAL : RTLD_LOCAL));
if (l_unlikely(lib == NULL))
lua_pushstring(L, dlerror());
return lib;
}
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = cast_func(dlsym(lib, sym));
if (l_unlikely(f == NULL))
lua_pushstring(L, dlerror());
return f;
}
/* }====================================================== */
#elif defined(LUA_DL_DLL) /* }{ */
/*
** {======================================================================
** This is an implementation of loadlib for Windows using native functions.
** =======================================================================
*/
#include <windows.h>
/*
** optional flags for LoadLibraryEx
*/
#if !defined(LUA_LLE_FLAGS)
#define LUA_LLE_FLAGS 0
#endif
#undef setprogdir
/*
** Replace in the path (on the top of the stack) any occurrence
** of LUA_EXEC_DIR with the executable's path.
*/
static void setprogdir (lua_State *L) {
char buff[MAX_PATH + 1];
char *lb;
DWORD nsize = sizeof(buff)/sizeof(char);
DWORD n = GetModuleFileNameA(NULL, buff, nsize); /* get exec. name */
if (n == 0 || n == nsize || (lb = strrchr(buff, '\\')) == NULL)
luaL_error(L, "unable to get ModuleFileName");
else {
*lb = '\0'; /* cut name on the last '\\' to get the path */
luaL_gsub(L, lua_tostring(L, -1), LUA_EXEC_DIR, buff);
lua_remove(L, -2); /* remove original string */
}
}
static void pusherror (lua_State *L) {
int error = GetLastError();
char buffer[128];
if (FormatMessageA(FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, error, 0, buffer, sizeof(buffer)/sizeof(char), NULL))
lua_pushstring(L, buffer);
else
lua_pushfstring(L, "system error %d\n", error);
}
static void lsys_unloadlib (void *lib) {
FreeLibrary((HMODULE)lib);
}
static void *lsys_load (lua_State *L, const char *path, int seeglb) {
HMODULE lib = LoadLibraryExA(path, NULL, LUA_LLE_FLAGS);
(void)(seeglb); /* not used: symbols are 'global' by default */
if (lib == NULL) pusherror(L);
return lib;
}
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
lua_CFunction f = (lua_CFunction)(voidf)GetProcAddress((HMODULE)lib, sym);
if (f == NULL) pusherror(L);
return f;
}
/* }====================================================== */
#else /* }{ */
/*
** {======================================================
** Fallback for other systems
** =======================================================
*/
#undef LIB_FAIL
#define LIB_FAIL "absent"
#define DLMSG "dynamic libraries not enabled; check your Lua installation"
static void lsys_unloadlib (void *lib) {
(void)(lib); /* not used */
}
static void *lsys_load (lua_State *L, const char *path, int seeglb) {
(void)(path); (void)(seeglb); /* not used */
lua_pushliteral(L, DLMSG);
return NULL;
}
static lua_CFunction lsys_sym (lua_State *L, void *lib, const char *sym) {
(void)(lib); (void)(sym); /* not used */
lua_pushliteral(L, DLMSG);
return NULL;
}
/* }====================================================== */
#endif /* } */
/*
** {==================================================================
** Set Paths
** ===================================================================
*/
/*
** LUA_PATH_VAR and LUA_CPATH_VAR are the names of the environment
** variables that Lua check to set its paths.
*/
#if !defined(LUA_PATH_VAR)
#define LUA_PATH_VAR "LUA_PATH"
#endif
#if !defined(LUA_CPATH_VAR)
#define LUA_CPATH_VAR "LUA_CPATH"
#endif
/*
** return registry.LUA_NOENV as a boolean
*/
static int noenv (lua_State *L) {
int b;
lua_getfield(L, LUA_REGISTRYINDEX, "LUA_NOENV");
b = lua_toboolean(L, -1);
lua_pop(L, 1); /* remove value */
return b;
}
/*
** Set a path
*/
static void setpath (lua_State *L, const char *fieldname,
const char *envname,
const char *dft) {
const char *dftmark;
const char *nver = lua_pushfstring(L, "%s%s", envname, LUA_VERSUFFIX);
const char *path = getenv(nver); /* try versioned name */
if (path == NULL) /* no versioned environment variable? */
path = getenv(envname); /* try unversioned name */
if (path == NULL || noenv(L)) /* no environment variable? */
lua_pushstring(L, dft); /* use default */
else if ((dftmark = strstr(path, LUA_PATH_SEP LUA_PATH_SEP)) == NULL)
lua_pushstring(L, path); /* nothing to change */
else { /* path contains a ";;": insert default path in its place */
size_t len = strlen(path);
luaL_Buffer b;
luaL_buffinit(L, &b);
if (path < dftmark) { /* is there a prefix before ';;'? */
luaL_addlstring(&b, path, dftmark - path); /* add it */
luaL_addchar(&b, *LUA_PATH_SEP);
}
luaL_addstring(&b, dft); /* add default */
if (dftmark < path + len - 2) { /* is there a suffix after ';;'? */
luaL_addchar(&b, *LUA_PATH_SEP);
luaL_addlstring(&b, dftmark + 2, (path + len - 2) - dftmark);
}
luaL_pushresult(&b);
}
setprogdir(L);
lua_setfield(L, -3, fieldname); /* package[fieldname] = path value */
lua_pop(L, 1); /* pop versioned variable name ('nver') */
}
/* }================================================================== */
/*
** return registry.CLIBS[path]
*/
static void *checkclib (lua_State *L, const char *path) {
void *plib;
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
lua_getfield(L, -1, path);
plib = lua_touserdata(L, -1); /* plib = CLIBS[path] */
lua_pop(L, 2); /* pop CLIBS table and 'plib' */
return plib;
}
/*
** registry.CLIBS[path] = plib -- for queries
** registry.CLIBS[#CLIBS + 1] = plib -- also keep a list of all libraries
*/
static void addtoclib (lua_State *L, const char *path, void *plib) {
lua_getfield(L, LUA_REGISTRYINDEX, CLIBS);
lua_pushlightuserdata(L, plib);
lua_pushvalue(L, -1);
lua_setfield(L, -3, path); /* CLIBS[path] = plib */
lua_rawseti(L, -2, luaL_len(L, -2) + 1); /* CLIBS[#CLIBS + 1] = plib */
lua_pop(L, 1); /* pop CLIBS table */
}
/*
** __gc tag method for CLIBS table: calls 'lsys_unloadlib' for all lib
** handles in list CLIBS
*/
static int gctm (lua_State *L) {
lua_Integer n = luaL_len(L, 1);
for (; n >= 1; n--) { /* for each handle, in reverse order */
lua_rawgeti(L, 1, n); /* get handle CLIBS[n] */
lsys_unloadlib(lua_touserdata(L, -1));
lua_pop(L, 1); /* pop handle */
}
return 0;
}
/* error codes for 'lookforfunc' */
#define ERRLIB 1
#define ERRFUNC 2
/*
** Look for a C function named 'sym' in a dynamically loaded library
** 'path'.
** First, check whether the library is already loaded; if not, try
** to load it.
** Then, if 'sym' is '*', return true (as library has been loaded).
** Otherwise, look for symbol 'sym' in the library and push a
** C function with that symbol.
** Return 0 and 'true' or a function in the stack; in case of
** errors, return an error code and an error message in the stack.
*/
static int lookforfunc (lua_State *L, const char *path, const char *sym) {
void *reg = checkclib(L, path); /* check loaded C libraries */
if (reg == NULL) { /* must load library? */
reg = lsys_load(L, path, *sym == '*'); /* global symbols if 'sym'=='*' */
if (reg == NULL) return ERRLIB; /* unable to load library */
addtoclib(L, path, reg);
}
if (*sym == '*') { /* loading only library (no function)? */
lua_pushboolean(L, 1); /* return 'true' */
return 0; /* no errors */
}
else {
lua_CFunction f = lsys_sym(L, reg, sym);
if (f == NULL)
return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f); /* else create new function */
return 0; /* no errors */
}
}
static int ll_loadlib (lua_State *L) {
const char *path = luaL_checkstring(L, 1);
const char *init = luaL_checkstring(L, 2);
int stat = lookforfunc(L, path, init);
if (l_likely(stat == 0)) /* no errors? */
return 1; /* return the loaded function */
else { /* error; error message is on stack top */
luaL_pushfail(L);
lua_insert(L, -2);
lua_pushstring(L, (stat == ERRLIB) ? LIB_FAIL : "init");
return 3; /* return fail, error message, and where */
}
}
/*
** {======================================================
** 'require' function
** =======================================================
*/
static int readable (const char *filename) {
FILE *f = fopen(filename, "r"); /* try to open file */
if (f == NULL) return 0; /* open failed */
fclose(f);
return 1;
}
/*
** Get the next name in '*path' = 'name1;name2;name3;...', changing
** the ending ';' to '\0' to create a zero-terminated string. Return
** NULL when list ends.
*/
static const char *getnextfilename (char **path, char *end) {
char *sep;
char *name = *path;
if (name == end)
return NULL; /* no more names */
else if (*name == '\0') { /* from previous iteration? */
*name = *LUA_PATH_SEP; /* restore separator */
name++; /* skip it */
}
sep = strchr(name, *LUA_PATH_SEP); /* find next separator */
if (sep == NULL) /* separator not found? */
sep = end; /* name goes until the end */
*sep = '\0'; /* finish file name */
*path = sep; /* will start next search from here */
return name;
}
/*
** Given a path such as ";blabla.so;blublu.so", pushes the string
**
** no file 'blabla.so'
** no file 'blublu.so'
*/
static void pusherrornotfound (lua_State *L, const char *path) {
luaL_Buffer b;
luaL_buffinit(L, &b);
luaL_addstring(&b, "no file '");
luaL_addgsub(&b, path, LUA_PATH_SEP, "'\n\tno file '");
luaL_addstring(&b, "'");
luaL_pushresult(&b);
}
static const char *searchpath (lua_State *L, const char *name,
const char *path,
const char *sep,
const char *dirsep) {
luaL_Buffer buff;
char *pathname; /* path with name inserted */
char *endpathname; /* its end */
const char *filename;
/* separator is non-empty and appears in 'name'? */
if (*sep != '\0' && strchr(name, *sep) != NULL)
name = luaL_gsub(L, name, sep, dirsep); /* replace it by 'dirsep' */
luaL_buffinit(L, &buff);
/* add path to the buffer, replacing marks ('?') with the file name */
luaL_addgsub(&buff, path, LUA_PATH_MARK, name);
luaL_addchar(&buff, '\0');
pathname = luaL_buffaddr(&buff); /* writable list of file names */
endpathname = pathname + luaL_bufflen(&buff) - 1;
while ((filename = getnextfilename(&pathname, endpathname)) != NULL) {
if (readable(filename)) /* does file exist and is readable? */
return lua_pushstring(L, filename); /* save and return name */
}
luaL_pushresult(&buff); /* push path to create error message */
pusherrornotfound(L, lua_tostring(L, -1)); /* create error message */
return NULL; /* not found */
}
static int ll_searchpath (lua_State *L) {
const char *f = searchpath(L, luaL_checkstring(L, 1),
luaL_checkstring(L, 2),
luaL_optstring(L, 3, "."),
luaL_optstring(L, 4, LUA_DIRSEP));
if (f != NULL) return 1;
else { /* error message is on top of the stack */
luaL_pushfail(L);
lua_insert(L, -2);
return 2; /* return fail + error message */
}
}
static const char *findfile (lua_State *L, const char *name,
const char *pname,
const char *dirsep) {
const char *path;
lua_getfield(L, lua_upvalueindex(1), pname);
path = lua_tostring(L, -1);
if (l_unlikely(path == NULL))
luaL_error(L, "'package.%s' must be a string", pname);
return searchpath(L, name, path, ".", dirsep);
}
static int checkload (lua_State *L, int stat, const char *filename) {
if (l_likely(stat)) { /* module loaded successfully? */
lua_pushstring(L, filename); /* will be 2nd argument to module */
return 2; /* return open function and file name */
}
else
return luaL_error(L, "error loading module '%s' from file '%s':\n\t%s",
lua_tostring(L, 1), filename, lua_tostring(L, -1));
}
static int searcher_Lua (lua_State *L) {
const char *filename;
const char *name = luaL_checkstring(L, 1);
filename = findfile(L, name, "path", LUA_LSUBSEP);
if (filename == NULL) return 1; /* module not found in this path */
return checkload(L, (luaL_loadfile(L, filename) == LUA_OK), filename);
}
/*
** Try to find a load function for module 'modname' at file 'filename'.
** First, change '.' to '_' in 'modname'; then, if 'modname' has
** the form X-Y (that is, it has an "ignore mark"), build a function
** name "luaopen_X" and look for it. (For compatibility, if that
** fails, it also tries "luaopen_Y".) If there is no ignore mark,
** look for a function named "luaopen_modname".
*/
static int loadfunc (lua_State *L, const char *filename, const char *modname) {
const char *openfunc;
const char *mark;
modname = luaL_gsub(L, modname, ".", LUA_OFSEP);
mark = strchr(modname, *LUA_IGMARK);
if (mark) {
int stat;
openfunc = lua_pushlstring(L, modname, mark - modname);
openfunc = lua_pushfstring(L, LUA_POF"%s", openfunc);
stat = lookforfunc(L, filename, openfunc);
if (stat != ERRFUNC) return stat;
modname = mark + 1; /* else go ahead and try old-style name */
}
openfunc = lua_pushfstring(L, LUA_POF"%s", modname);
return lookforfunc(L, filename, openfunc);
}
static int searcher_C (lua_State *L) {
const char *name = luaL_checkstring(L, 1);
const char *filename = findfile(L, name, "cpath", LUA_CSUBSEP);
if (filename == NULL) return 1; /* module not found in this path */
return checkload(L, (loadfunc(L, filename, name) == 0), filename);
}
static int searcher_Croot (lua_State *L) {
const char *filename;
const char *name = luaL_checkstring(L, 1);
const char *p = strchr(name, '.');
int stat;
if (p == NULL) return 0; /* is root */
lua_pushlstring(L, name, p - name);
filename = findfile(L, lua_tostring(L, -1), "cpath", LUA_CSUBSEP);
if (filename == NULL) return 1; /* root not found */
if ((stat = loadfunc(L, filename, name)) != 0) {
if (stat != ERRFUNC)
return checkload(L, 0, filename); /* real error */
else { /* open function not found */
lua_pushfstring(L, "no module '%s' in file '%s'", name, filename);
return 1;
}
}
lua_pushstring(L, filename); /* will be 2nd argument to module */
return 2;
}
static int searcher_preload (lua_State *L) {
const char *name = luaL_checkstring(L, 1);
lua_getfield(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
if (lua_getfield(L, -1, name) == LUA_TNIL) { /* not found? */
lua_pushfstring(L, "no field package.preload['%s']", name);
return 1;
}
else {
lua_pushliteral(L, ":preload:");
return 2;
}
}
static void findloader (lua_State *L, const char *name) {
int i;
luaL_Buffer msg; /* to build error message */
/* push 'package.searchers' to index 3 in the stack */
if (l_unlikely(lua_getfield(L, lua_upvalueindex(1), "searchers")
!= LUA_TTABLE))
luaL_error(L, "'package.searchers' must be a table");
luaL_buffinit(L, &msg);
/* iterate over available searchers to find a loader */
for (i = 1; ; i++) {
luaL_addstring(&msg, "\n\t"); /* error-message prefix */
if (l_unlikely(lua_rawgeti(L, 3, i) == LUA_TNIL)) { /* no more searchers? */
lua_pop(L, 1); /* remove nil */
luaL_buffsub(&msg, 2); /* remove prefix */
luaL_pushresult(&msg); /* create error message */
luaL_error(L, "module '%s' not found:%s", name, lua_tostring(L, -1));
}
lua_pushstring(L, name);
lua_call(L, 1, 2); /* call it */
if (lua_isfunction(L, -2)) /* did it find a loader? */
return; /* module loader found */
else if (lua_isstring(L, -2)) { /* searcher returned error message? */
lua_pop(L, 1); /* remove extra return */
luaL_addvalue(&msg); /* concatenate error message */
}
else { /* no error message */
lua_pop(L, 2); /* remove both returns */
luaL_buffsub(&msg, 2); /* remove prefix */
}
}
}
static int ll_require (lua_State *L) {
const char *name = luaL_checkstring(L, 1);
lua_settop(L, 1); /* LOADED table will be at index 2 */
lua_getfield(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
lua_getfield(L, 2, name); /* LOADED[name] */
if (lua_toboolean(L, -1)) /* is it there? */
return 1; /* package is already loaded */
/* else must load package */
lua_pop(L, 1); /* remove 'getfield' result */
findloader(L, name);
lua_rotate(L, -2, 1); /* function <-> loader data */
lua_pushvalue(L, 1); /* name is 1st argument to module loader */
lua_pushvalue(L, -3); /* loader data is 2nd argument */
/* stack: ...; loader data; loader function; mod. name; loader data */
lua_call(L, 2, 1); /* run loader to load module */
/* stack: ...; loader data; result from loader */
if (!lua_isnil(L, -1)) /* non-nil return? */
lua_setfield(L, 2, name); /* LOADED[name] = returned value */
else
lua_pop(L, 1); /* pop nil */
if (lua_getfield(L, 2, name) == LUA_TNIL) { /* module set no value? */
lua_pushboolean(L, 1); /* use true as result */
lua_copy(L, -1, -2); /* replace loader result */
lua_setfield(L, 2, name); /* LOADED[name] = true */
}
lua_rotate(L, -2, 1); /* loader data <-> module result */
return 2; /* return module result and loader data */
}
/* }====================================================== */
static const luaL_Reg pk_funcs[] = {
{"loadlib", ll_loadlib},
{"searchpath", ll_searchpath},
/* placeholders */
{"preload", NULL},
{"cpath", NULL},
{"path", NULL},
{"searchers", NULL},
{"loaded", NULL},
{NULL, NULL}
};
static const luaL_Reg ll_funcs[] = {
{"require", ll_require},
{NULL, NULL}
};
static void createsearcherstable (lua_State *L) {
static const lua_CFunction searchers[] = {
searcher_preload,
searcher_Lua,
searcher_C,
searcher_Croot,
NULL
};
int i;
/* create 'searchers' table */
lua_createtable(L, sizeof(searchers)/sizeof(searchers[0]) - 1, 0);
/* fill it with predefined searchers */
for (i=0; searchers[i] != NULL; i++) {
lua_pushvalue(L, -2); /* set 'package' as upvalue for all searchers */
lua_pushcclosure(L, searchers[i], 1);
lua_rawseti(L, -2, i+1);
}
lua_setfield(L, -2, "searchers"); /* put it in field 'searchers' */
}
/*
** create table CLIBS to keep track of loaded C libraries,
** setting a finalizer to close all libraries when closing state.
*/
static void createclibstable (lua_State *L) {
luaL_getsubtable(L, LUA_REGISTRYINDEX, CLIBS); /* create CLIBS table */
lua_createtable(L, 0, 1); /* create metatable for CLIBS */
lua_pushcfunction(L, gctm);
lua_setfield(L, -2, "__gc"); /* set finalizer for CLIBS table */
lua_setmetatable(L, -2);
}
LUAMOD_API int luaopen_package (lua_State *L) {
createclibstable(L);
luaL_newlib(L, pk_funcs); /* create 'package' table */
createsearcherstable(L);
/* set paths */
setpath(L, "path", LUA_PATH_VAR, LUA_PATH_DEFAULT);
setpath(L, "cpath", LUA_CPATH_VAR, LUA_CPATH_DEFAULT);
/* store config information */
lua_pushliteral(L, LUA_DIRSEP "\n" LUA_PATH_SEP "\n" LUA_PATH_MARK "\n"
LUA_EXEC_DIR "\n" LUA_IGMARK "\n");
lua_setfield(L, -2, "config");
/* set field 'loaded' */
luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_LOADED_TABLE);
lua_setfield(L, -2, "loaded");
/* set field 'preload' */
luaL_getsubtable(L, LUA_REGISTRYINDEX, LUA_PRELOAD_TABLE);
lua_setfield(L, -2, "preload");
lua_pushglobaltable(L);
lua_pushvalue(L, -2); /* set 'package' as upvalue for next lib */
luaL_setfuncs(L, ll_funcs, 1); /* open lib into global table */
lua_pop(L, 1); /* pop global table */
return 1; /* return 'package' table */
}

602
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@ -0,0 +1,602 @@
/*
** $Id: lobject.c $
** Some generic functions over Lua objects
** See Copyright Notice in lua.h
*/
#define lobject_c
#define LUA_CORE
#include "lprefix.h"
#include <locale.h>
#include <math.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lua.h"
#include "lctype.h"
#include "ldebug.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "lvm.h"
/*
** Computes ceil(log2(x))
*/
int luaO_ceillog2 (unsigned int x) {
static const lu_byte log_2[256] = { /* log_2[i] = ceil(log2(i - 1)) */
0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
};
int l = 0;
x--;
while (x >= 256) { l += 8; x >>= 8; }
return l + log_2[x];
}
static lua_Integer intarith (lua_State *L, int op, lua_Integer v1,
lua_Integer v2) {
switch (op) {
case LUA_OPADD: return intop(+, v1, v2);
case LUA_OPSUB:return intop(-, v1, v2);
case LUA_OPMUL:return intop(*, v1, v2);
case LUA_OPMOD: return luaV_mod(L, v1, v2);
case LUA_OPIDIV: return luaV_idiv(L, v1, v2);
case LUA_OPBAND: return intop(&, v1, v2);
case LUA_OPBOR: return intop(|, v1, v2);
case LUA_OPBXOR: return intop(^, v1, v2);
case LUA_OPSHL: return luaV_shiftl(v1, v2);
case LUA_OPSHR: return luaV_shiftr(v1, v2);
case LUA_OPUNM: return intop(-, 0, v1);
case LUA_OPBNOT: return intop(^, ~l_castS2U(0), v1);
default: lua_assert(0); return 0;
}
}
static lua_Number numarith (lua_State *L, int op, lua_Number v1,
lua_Number v2) {
switch (op) {
case LUA_OPADD: return luai_numadd(L, v1, v2);
case LUA_OPSUB: return luai_numsub(L, v1, v2);
case LUA_OPMUL: return luai_nummul(L, v1, v2);
case LUA_OPDIV: return luai_numdiv(L, v1, v2);
case LUA_OPPOW: return luai_numpow(L, v1, v2);
case LUA_OPIDIV: return luai_numidiv(L, v1, v2);
case LUA_OPUNM: return luai_numunm(L, v1);
case LUA_OPMOD: return luaV_modf(L, v1, v2);
default: lua_assert(0); return 0;
}
}
int luaO_rawarith (lua_State *L, int op, const TValue *p1, const TValue *p2,
TValue *res) {
switch (op) {
case LUA_OPBAND: case LUA_OPBOR: case LUA_OPBXOR:
case LUA_OPSHL: case LUA_OPSHR:
case LUA_OPBNOT: { /* operate only on integers */
lua_Integer i1; lua_Integer i2;
if (tointegerns(p1, &i1) && tointegerns(p2, &i2)) {
setivalue(res, intarith(L, op, i1, i2));
return 1;
}
else return 0; /* fail */
}
case LUA_OPDIV: case LUA_OPPOW: { /* operate only on floats */
lua_Number n1; lua_Number n2;
if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
setfltvalue(res, numarith(L, op, n1, n2));
return 1;
}
else return 0; /* fail */
}
default: { /* other operations */
lua_Number n1; lua_Number n2;
if (ttisinteger(p1) && ttisinteger(p2)) {
setivalue(res, intarith(L, op, ivalue(p1), ivalue(p2)));
return 1;
}
else if (tonumberns(p1, n1) && tonumberns(p2, n2)) {
setfltvalue(res, numarith(L, op, n1, n2));
return 1;
}
else return 0; /* fail */
}
}
}
void luaO_arith (lua_State *L, int op, const TValue *p1, const TValue *p2,
StkId res) {
if (!luaO_rawarith(L, op, p1, p2, s2v(res))) {
/* could not perform raw operation; try metamethod */
luaT_trybinTM(L, p1, p2, res, cast(TMS, (op - LUA_OPADD) + TM_ADD));
}
}
int luaO_hexavalue (int c) {
if (lisdigit(c)) return c - '0';
else return (ltolower(c) - 'a') + 10;
}
static int isneg (const char **s) {
if (**s == '-') { (*s)++; return 1; }
else if (**s == '+') (*s)++;
return 0;
}
/*
** {==================================================================
** Lua's implementation for 'lua_strx2number'
** ===================================================================
*/
#if !defined(lua_strx2number)
/* maximum number of significant digits to read (to avoid overflows
even with single floats) */
#define MAXSIGDIG 30
/*
** convert a hexadecimal numeric string to a number, following
** C99 specification for 'strtod'
*/
static lua_Number lua_strx2number (const char *s, char **endptr) {
int dot = lua_getlocaledecpoint();
lua_Number r = l_mathop(0.0); /* result (accumulator) */
int sigdig = 0; /* number of significant digits */
int nosigdig = 0; /* number of non-significant digits */
int e = 0; /* exponent correction */
int neg; /* 1 if number is negative */
int hasdot = 0; /* true after seen a dot */
*endptr = cast_charp(s); /* nothing is valid yet */
while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
neg = isneg(&s); /* check sign */
if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X'))) /* check '0x' */
return l_mathop(0.0); /* invalid format (no '0x') */
for (s += 2; ; s++) { /* skip '0x' and read numeral */
if (*s == dot) {
if (hasdot) break; /* second dot? stop loop */
else hasdot = 1;
}
else if (lisxdigit(cast_uchar(*s))) {
if (sigdig == 0 && *s == '0') /* non-significant digit (zero)? */
nosigdig++;
else if (++sigdig <= MAXSIGDIG) /* can read it without overflow? */
r = (r * l_mathop(16.0)) + luaO_hexavalue(*s);
else e++; /* too many digits; ignore, but still count for exponent */
if (hasdot) e--; /* decimal digit? correct exponent */
}
else break; /* neither a dot nor a digit */
}
if (nosigdig + sigdig == 0) /* no digits? */
return l_mathop(0.0); /* invalid format */
*endptr = cast_charp(s); /* valid up to here */
e *= 4; /* each digit multiplies/divides value by 2^4 */
if (*s == 'p' || *s == 'P') { /* exponent part? */
int exp1 = 0; /* exponent value */
int neg1; /* exponent sign */
s++; /* skip 'p' */
neg1 = isneg(&s); /* sign */
if (!lisdigit(cast_uchar(*s)))
return l_mathop(0.0); /* invalid; must have at least one digit */
while (lisdigit(cast_uchar(*s))) /* read exponent */
exp1 = exp1 * 10 + *(s++) - '0';
if (neg1) exp1 = -exp1;
e += exp1;
*endptr = cast_charp(s); /* valid up to here */
}
if (neg) r = -r;
return l_mathop(ldexp)(r, e);
}
#endif
/* }====================================================== */
/* maximum length of a numeral to be converted to a number */
#if !defined (L_MAXLENNUM)
#define L_MAXLENNUM 200
#endif
/*
** Convert string 's' to a Lua number (put in 'result'). Return NULL on
** fail or the address of the ending '\0' on success. ('mode' == 'x')
** means a hexadecimal numeral.
*/
static const char *l_str2dloc (const char *s, lua_Number *result, int mode) {
char *endptr;
*result = (mode == 'x') ? lua_strx2number(s, &endptr) /* try to convert */
: lua_str2number(s, &endptr);
if (endptr == s) return NULL; /* nothing recognized? */
while (lisspace(cast_uchar(*endptr))) endptr++; /* skip trailing spaces */
return (*endptr == '\0') ? endptr : NULL; /* OK iff no trailing chars */
}
/*
** Convert string 's' to a Lua number (put in 'result') handling the
** current locale.
** This function accepts both the current locale or a dot as the radix
** mark. If the conversion fails, it may mean number has a dot but
** locale accepts something else. In that case, the code copies 's'
** to a buffer (because 's' is read-only), changes the dot to the
** current locale radix mark, and tries to convert again.
** The variable 'mode' checks for special characters in the string:
** - 'n' means 'inf' or 'nan' (which should be rejected)
** - 'x' means a hexadecimal numeral
** - '.' just optimizes the search for the common case (no special chars)
*/
static const char *l_str2d (const char *s, lua_Number *result) {
const char *endptr;
const char *pmode = strpbrk(s, ".xXnN"); /* look for special chars */
int mode = pmode ? ltolower(cast_uchar(*pmode)) : 0;
if (mode == 'n') /* reject 'inf' and 'nan' */
return NULL;
endptr = l_str2dloc(s, result, mode); /* try to convert */
if (endptr == NULL) { /* failed? may be a different locale */
char buff[L_MAXLENNUM + 1];
const char *pdot = strchr(s, '.');
if (pdot == NULL || strlen(s) > L_MAXLENNUM)
return NULL; /* string too long or no dot; fail */
strcpy(buff, s); /* copy string to buffer */
buff[pdot - s] = lua_getlocaledecpoint(); /* correct decimal point */
endptr = l_str2dloc(buff, result, mode); /* try again */
if (endptr != NULL)
endptr = s + (endptr - buff); /* make relative to 's' */
}
return endptr;
}
#define MAXBY10 cast(lua_Unsigned, LUA_MAXINTEGER / 10)
#define MAXLASTD cast_int(LUA_MAXINTEGER % 10)
static const char *l_str2int (const char *s, lua_Integer *result) {
lua_Unsigned a = 0;
int empty = 1;
int neg;
while (lisspace(cast_uchar(*s))) s++; /* skip initial spaces */
neg = isneg(&s);
if (s[0] == '0' &&
(s[1] == 'x' || s[1] == 'X')) { /* hex? */
s += 2; /* skip '0x' */
for (; lisxdigit(cast_uchar(*s)); s++) {
a = a * 16 + luaO_hexavalue(*s);
empty = 0;
}
}
else { /* decimal */
for (; lisdigit(cast_uchar(*s)); s++) {
int d = *s - '0';
if (a >= MAXBY10 && (a > MAXBY10 || d > MAXLASTD + neg)) /* overflow? */
return NULL; /* do not accept it (as integer) */
a = a * 10 + d;
empty = 0;
}
}
while (lisspace(cast_uchar(*s))) s++; /* skip trailing spaces */
if (empty || *s != '\0') return NULL; /* something wrong in the numeral */
else {
*result = l_castU2S((neg) ? 0u - a : a);
return s;
}
}
size_t luaO_str2num (const char *s, TValue *o) {
lua_Integer i; lua_Number n;
const char *e;
if ((e = l_str2int(s, &i)) != NULL) { /* try as an integer */
setivalue(o, i);
}
else if ((e = l_str2d(s, &n)) != NULL) { /* else try as a float */
setfltvalue(o, n);
}
else
return 0; /* conversion failed */
return (e - s) + 1; /* success; return string size */
}
int luaO_utf8esc (char *buff, unsigned long x) {
int n = 1; /* number of bytes put in buffer (backwards) */
lua_assert(x <= 0x7FFFFFFFu);
if (x < 0x80) /* ascii? */
buff[UTF8BUFFSZ - 1] = cast_char(x);
else { /* need continuation bytes */
unsigned int mfb = 0x3f; /* maximum that fits in first byte */
do { /* add continuation bytes */
buff[UTF8BUFFSZ - (n++)] = cast_char(0x80 | (x & 0x3f));
x >>= 6; /* remove added bits */
mfb >>= 1; /* now there is one less bit available in first byte */
} while (x > mfb); /* still needs continuation byte? */
buff[UTF8BUFFSZ - n] = cast_char((~mfb << 1) | x); /* add first byte */
}
return n;
}
/*
** Maximum length of the conversion of a number to a string. Must be
** enough to accommodate both LUA_INTEGER_FMT and LUA_NUMBER_FMT.
** (For a long long int, this is 19 digits plus a sign and a final '\0',
** adding to 21. For a long double, it can go to a sign, 33 digits,
** the dot, an exponent letter, an exponent sign, 5 exponent digits,
** and a final '\0', adding to 43.)
*/
#define MAXNUMBER2STR 44
/*
** Convert a number object to a string, adding it to a buffer
*/
static int tostringbuff (TValue *obj, char *buff) {
int len;
lua_assert(ttisnumber(obj));
if (ttisinteger(obj))
len = lua_integer2str(buff, MAXNUMBER2STR, ivalue(obj));
else {
len = lua_number2str(buff, MAXNUMBER2STR, fltvalue(obj));
if (buff[strspn(buff, "-0123456789")] == '\0') { /* looks like an int? */
buff[len++] = lua_getlocaledecpoint();
buff[len++] = '0'; /* adds '.0' to result */
}
}
return len;
}
/*
** Convert a number object to a Lua string, replacing the value at 'obj'
*/
void luaO_tostring (lua_State *L, TValue *obj) {
char buff[MAXNUMBER2STR];
int len = tostringbuff(obj, buff);
setsvalue(L, obj, luaS_newlstr(L, buff, len));
}
/*
** {==================================================================
** 'luaO_pushvfstring'
** ===================================================================
*/
/*
** Size for buffer space used by 'luaO_pushvfstring'. It should be
** (LUA_IDSIZE + MAXNUMBER2STR) + a minimal space for basic messages,
** so that 'luaG_addinfo' can work directly on the buffer.
*/
#define BUFVFS (LUA_IDSIZE + MAXNUMBER2STR + 95)
/* buffer used by 'luaO_pushvfstring' */
typedef struct BuffFS {
lua_State *L;
int pushed; /* true if there is a part of the result on the stack */
int blen; /* length of partial string in 'space' */
char space[BUFVFS]; /* holds last part of the result */
} BuffFS;
/*
** Push given string to the stack, as part of the result, and
** join it to previous partial result if there is one.
** It may call 'luaV_concat' while using one slot from EXTRA_STACK.
** This call cannot invoke metamethods, as both operands must be
** strings. It can, however, raise an error if the result is too
** long. In that case, 'luaV_concat' frees the extra slot before
** raising the error.
*/
static void pushstr (BuffFS *buff, const char *str, size_t lstr) {
lua_State *L = buff->L;
setsvalue2s(L, L->top.p, luaS_newlstr(L, str, lstr));
L->top.p++; /* may use one slot from EXTRA_STACK */
if (!buff->pushed) /* no previous string on the stack? */
buff->pushed = 1; /* now there is one */
else /* join previous string with new one */
luaV_concat(L, 2);
}
/*
** empty the buffer space into the stack
*/
static void clearbuff (BuffFS *buff) {
pushstr(buff, buff->space, buff->blen); /* push buffer contents */
buff->blen = 0; /* space now is empty */
}
/*
** Get a space of size 'sz' in the buffer. If buffer has not enough
** space, empty it. 'sz' must fit in an empty buffer.
*/
static char *getbuff (BuffFS *buff, int sz) {
lua_assert(buff->blen <= BUFVFS); lua_assert(sz <= BUFVFS);
if (sz > BUFVFS - buff->blen) /* not enough space? */
clearbuff(buff);
return buff->space + buff->blen;
}
#define addsize(b,sz) ((b)->blen += (sz))
/*
** Add 'str' to the buffer. If string is larger than the buffer space,
** push the string directly to the stack.
*/
static void addstr2buff (BuffFS *buff, const char *str, size_t slen) {
if (slen <= BUFVFS) { /* does string fit into buffer? */
char *bf = getbuff(buff, cast_int(slen));
memcpy(bf, str, slen); /* add string to buffer */
addsize(buff, cast_int(slen));
}
else { /* string larger than buffer */
clearbuff(buff); /* string comes after buffer's content */
pushstr(buff, str, slen); /* push string */
}
}
/*
** Add a numeral to the buffer.
*/
static void addnum2buff (BuffFS *buff, TValue *num) {
char *numbuff = getbuff(buff, MAXNUMBER2STR);
int len = tostringbuff(num, numbuff); /* format number into 'numbuff' */
addsize(buff, len);
}
/*
** this function handles only '%d', '%c', '%f', '%p', '%s', and '%%'
conventional formats, plus Lua-specific '%I' and '%U'
*/
const char *luaO_pushvfstring (lua_State *L, const char *fmt, va_list argp) {
BuffFS buff; /* holds last part of the result */
const char *e; /* points to next '%' */
buff.pushed = buff.blen = 0;
buff.L = L;
while ((e = strchr(fmt, '%')) != NULL) {
addstr2buff(&buff, fmt, e - fmt); /* add 'fmt' up to '%' */
switch (*(e + 1)) { /* conversion specifier */
case 's': { /* zero-terminated string */
const char *s = va_arg(argp, char *);
if (s == NULL) s = "(null)";
addstr2buff(&buff, s, strlen(s));
break;
}
case 'c': { /* an 'int' as a character */
char c = cast_uchar(va_arg(argp, int));
addstr2buff(&buff, &c, sizeof(char));
break;
}
case 'd': { /* an 'int' */
TValue num;
setivalue(&num, va_arg(argp, int));
addnum2buff(&buff, &num);
break;
}
case 'I': { /* a 'lua_Integer' */
TValue num;
setivalue(&num, cast(lua_Integer, va_arg(argp, l_uacInt)));
addnum2buff(&buff, &num);
break;
}
case 'f': { /* a 'lua_Number' */
TValue num;
setfltvalue(&num, cast_num(va_arg(argp, l_uacNumber)));
addnum2buff(&buff, &num);
break;
}
case 'p': { /* a pointer */
const int sz = 3 * sizeof(void*) + 8; /* enough space for '%p' */
char *bf = getbuff(&buff, sz);
void *p = va_arg(argp, void *);
int len = lua_pointer2str(bf, sz, p);
addsize(&buff, len);
break;
}
case 'U': { /* a 'long' as a UTF-8 sequence */
char bf[UTF8BUFFSZ];
int len = luaO_utf8esc(bf, va_arg(argp, long));
addstr2buff(&buff, bf + UTF8BUFFSZ - len, len);
break;
}
case '%': {
addstr2buff(&buff, "%", 1);
break;
}
default: {
luaG_runerror(L, "invalid option '%%%c' to 'lua_pushfstring'",
*(e + 1));
}
}
fmt = e + 2; /* skip '%' and the specifier */
}
addstr2buff(&buff, fmt, strlen(fmt)); /* rest of 'fmt' */
clearbuff(&buff); /* empty buffer into the stack */
lua_assert(buff.pushed == 1);
return getstr(tsvalue(s2v(L->top.p - 1)));
}
const char *luaO_pushfstring (lua_State *L, const char *fmt, ...) {
const char *msg;
va_list argp;
va_start(argp, fmt);
msg = luaO_pushvfstring(L, fmt, argp);
va_end(argp);
return msg;
}
/* }================================================================== */
#define RETS "..."
#define PRE "[string \""
#define POS "\"]"
#define addstr(a,b,l) ( memcpy(a,b,(l) * sizeof(char)), a += (l) )
void luaO_chunkid (char *out, const char *source, size_t srclen) {
size_t bufflen = LUA_IDSIZE; /* free space in buffer */
if (*source == '=') { /* 'literal' source */
if (srclen <= bufflen) /* small enough? */
memcpy(out, source + 1, srclen * sizeof(char));
else { /* truncate it */
addstr(out, source + 1, bufflen - 1);
*out = '\0';
}
}
else if (*source == '@') { /* file name */
if (srclen <= bufflen) /* small enough? */
memcpy(out, source + 1, srclen * sizeof(char));
else { /* add '...' before rest of name */
addstr(out, RETS, LL(RETS));
bufflen -= LL(RETS);
memcpy(out, source + 1 + srclen - bufflen, bufflen * sizeof(char));
}
}
else { /* string; format as [string "source"] */
const char *nl = strchr(source, '\n'); /* find first new line (if any) */
addstr(out, PRE, LL(PRE)); /* add prefix */
bufflen -= LL(PRE RETS POS) + 1; /* save space for prefix+suffix+'\0' */
if (srclen < bufflen && nl == NULL) { /* small one-line source? */
addstr(out, source, srclen); /* keep it */
}
else {
if (nl != NULL) srclen = nl - source; /* stop at first newline */
if (srclen > bufflen) srclen = bufflen;
addstr(out, source, srclen);
addstr(out, RETS, LL(RETS));
}
memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
}
}

813
lua-5.4.7/src/lobject.h Normal file
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@ -0,0 +1,813 @@
/*
** $Id: lobject.h $
** Type definitions for Lua objects
** See Copyright Notice in lua.h
*/
#ifndef lobject_h
#define lobject_h
#include <stdarg.h>
#include "llimits.h"
#include "lua.h"
/*
** Extra types for collectable non-values
*/
#define LUA_TUPVAL LUA_NUMTYPES /* upvalues */
#define LUA_TPROTO (LUA_NUMTYPES+1) /* function prototypes */
#define LUA_TDEADKEY (LUA_NUMTYPES+2) /* removed keys in tables */
/*
** number of all possible types (including LUA_TNONE but excluding DEADKEY)
*/
#define LUA_TOTALTYPES (LUA_TPROTO + 2)
/*
** tags for Tagged Values have the following use of bits:
** bits 0-3: actual tag (a LUA_T* constant)
** bits 4-5: variant bits
** bit 6: whether value is collectable
*/
/* add variant bits to a type */
#define makevariant(t,v) ((t) | ((v) << 4))
/*
** Union of all Lua values
*/
typedef union Value {
struct GCObject *gc; /* collectable objects */
void *p; /* light userdata */
lua_CFunction f; /* light C functions */
lua_Integer i; /* integer numbers */
lua_Number n; /* float numbers */
/* not used, but may avoid warnings for uninitialized value */
lu_byte ub;
} Value;
/*
** Tagged Values. This is the basic representation of values in Lua:
** an actual value plus a tag with its type.
*/
#define TValuefields Value value_; lu_byte tt_
typedef struct TValue {
TValuefields;
} TValue;
#define val_(o) ((o)->value_)
#define valraw(o) (val_(o))
/* raw type tag of a TValue */
#define rawtt(o) ((o)->tt_)
/* tag with no variants (bits 0-3) */
#define novariant(t) ((t) & 0x0F)
/* type tag of a TValue (bits 0-3 for tags + variant bits 4-5) */
#define withvariant(t) ((t) & 0x3F)
#define ttypetag(o) withvariant(rawtt(o))
/* type of a TValue */
#define ttype(o) (novariant(rawtt(o)))
/* Macros to test type */
#define checktag(o,t) (rawtt(o) == (t))
#define checktype(o,t) (ttype(o) == (t))
/* Macros for internal tests */
/* collectable object has the same tag as the original value */
#define righttt(obj) (ttypetag(obj) == gcvalue(obj)->tt)
/*
** Any value being manipulated by the program either is non
** collectable, or the collectable object has the right tag
** and it is not dead. The option 'L == NULL' allows other
** macros using this one to be used where L is not available.
*/
#define checkliveness(L,obj) \
((void)L, lua_longassert(!iscollectable(obj) || \
(righttt(obj) && (L == NULL || !isdead(G(L),gcvalue(obj))))))
/* Macros to set values */
/* set a value's tag */
#define settt_(o,t) ((o)->tt_=(t))
/* main macro to copy values (from 'obj2' to 'obj1') */
#define setobj(L,obj1,obj2) \
{ TValue *io1=(obj1); const TValue *io2=(obj2); \
io1->value_ = io2->value_; settt_(io1, io2->tt_); \
checkliveness(L,io1); lua_assert(!isnonstrictnil(io1)); }
/*
** Different types of assignments, according to source and destination.
** (They are mostly equal now, but may be different in the future.)
*/
/* from stack to stack */
#define setobjs2s(L,o1,o2) setobj(L,s2v(o1),s2v(o2))
/* to stack (not from same stack) */
#define setobj2s(L,o1,o2) setobj(L,s2v(o1),o2)
/* from table to same table */
#define setobjt2t setobj
/* to new object */
#define setobj2n setobj
/* to table */
#define setobj2t setobj
/*
** Entries in a Lua stack. Field 'tbclist' forms a list of all
** to-be-closed variables active in this stack. Dummy entries are
** used when the distance between two tbc variables does not fit
** in an unsigned short. They are represented by delta==0, and
** their real delta is always the maximum value that fits in
** that field.
*/
typedef union StackValue {
TValue val;
struct {
TValuefields;
unsigned short delta;
} tbclist;
} StackValue;
/* index to stack elements */
typedef StackValue *StkId;
/*
** When reallocating the stack, change all pointers to the stack into
** proper offsets.
*/
typedef union {
StkId p; /* actual pointer */
ptrdiff_t offset; /* used while the stack is being reallocated */
} StkIdRel;
/* convert a 'StackValue' to a 'TValue' */
#define s2v(o) (&(o)->val)
/*
** {==================================================================
** Nil
** ===================================================================
*/
/* Standard nil */
#define LUA_VNIL makevariant(LUA_TNIL, 0)
/* Empty slot (which might be different from a slot containing nil) */
#define LUA_VEMPTY makevariant(LUA_TNIL, 1)
/* Value returned for a key not found in a table (absent key) */
#define LUA_VABSTKEY makevariant(LUA_TNIL, 2)
/* macro to test for (any kind of) nil */
#define ttisnil(v) checktype((v), LUA_TNIL)
/* macro to test for a standard nil */
#define ttisstrictnil(o) checktag((o), LUA_VNIL)
#define setnilvalue(obj) settt_(obj, LUA_VNIL)
#define isabstkey(v) checktag((v), LUA_VABSTKEY)
/*
** macro to detect non-standard nils (used only in assertions)
*/
#define isnonstrictnil(v) (ttisnil(v) && !ttisstrictnil(v))
/*
** By default, entries with any kind of nil are considered empty.
** (In any definition, values associated with absent keys must also
** be accepted as empty.)
*/
#define isempty(v) ttisnil(v)
/* macro defining a value corresponding to an absent key */
#define ABSTKEYCONSTANT {NULL}, LUA_VABSTKEY
/* mark an entry as empty */
#define setempty(v) settt_(v, LUA_VEMPTY)
/* }================================================================== */
/*
** {==================================================================
** Booleans
** ===================================================================
*/
#define LUA_VFALSE makevariant(LUA_TBOOLEAN, 0)
#define LUA_VTRUE makevariant(LUA_TBOOLEAN, 1)
#define ttisboolean(o) checktype((o), LUA_TBOOLEAN)
#define ttisfalse(o) checktag((o), LUA_VFALSE)
#define ttistrue(o) checktag((o), LUA_VTRUE)
#define l_isfalse(o) (ttisfalse(o) || ttisnil(o))
#define setbfvalue(obj) settt_(obj, LUA_VFALSE)
#define setbtvalue(obj) settt_(obj, LUA_VTRUE)
/* }================================================================== */
/*
** {==================================================================
** Threads
** ===================================================================
*/
#define LUA_VTHREAD makevariant(LUA_TTHREAD, 0)
#define ttisthread(o) checktag((o), ctb(LUA_VTHREAD))
#define thvalue(o) check_exp(ttisthread(o), gco2th(val_(o).gc))
#define setthvalue(L,obj,x) \
{ TValue *io = (obj); lua_State *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTHREAD)); \
checkliveness(L,io); }
#define setthvalue2s(L,o,t) setthvalue(L,s2v(o),t)
/* }================================================================== */
/*
** {==================================================================
** Collectable Objects
** ===================================================================
*/
/*
** Common Header for all collectable objects (in macro form, to be
** included in other objects)
*/
#define CommonHeader struct GCObject *next; lu_byte tt; lu_byte marked
/* Common type for all collectable objects */
typedef struct GCObject {
CommonHeader;
} GCObject;
/* Bit mark for collectable types */
#define BIT_ISCOLLECTABLE (1 << 6)
#define iscollectable(o) (rawtt(o) & BIT_ISCOLLECTABLE)
/* mark a tag as collectable */
#define ctb(t) ((t) | BIT_ISCOLLECTABLE)
#define gcvalue(o) check_exp(iscollectable(o), val_(o).gc)
#define gcvalueraw(v) ((v).gc)
#define setgcovalue(L,obj,x) \
{ TValue *io = (obj); GCObject *i_g=(x); \
val_(io).gc = i_g; settt_(io, ctb(i_g->tt)); }
/* }================================================================== */
/*
** {==================================================================
** Numbers
** ===================================================================
*/
/* Variant tags for numbers */
#define LUA_VNUMINT makevariant(LUA_TNUMBER, 0) /* integer numbers */
#define LUA_VNUMFLT makevariant(LUA_TNUMBER, 1) /* float numbers */
#define ttisnumber(o) checktype((o), LUA_TNUMBER)
#define ttisfloat(o) checktag((o), LUA_VNUMFLT)
#define ttisinteger(o) checktag((o), LUA_VNUMINT)
#define nvalue(o) check_exp(ttisnumber(o), \
(ttisinteger(o) ? cast_num(ivalue(o)) : fltvalue(o)))
#define fltvalue(o) check_exp(ttisfloat(o), val_(o).n)
#define ivalue(o) check_exp(ttisinteger(o), val_(o).i)
#define fltvalueraw(v) ((v).n)
#define ivalueraw(v) ((v).i)
#define setfltvalue(obj,x) \
{ TValue *io=(obj); val_(io).n=(x); settt_(io, LUA_VNUMFLT); }
#define chgfltvalue(obj,x) \
{ TValue *io=(obj); lua_assert(ttisfloat(io)); val_(io).n=(x); }
#define setivalue(obj,x) \
{ TValue *io=(obj); val_(io).i=(x); settt_(io, LUA_VNUMINT); }
#define chgivalue(obj,x) \
{ TValue *io=(obj); lua_assert(ttisinteger(io)); val_(io).i=(x); }
/* }================================================================== */
/*
** {==================================================================
** Strings
** ===================================================================
*/
/* Variant tags for strings */
#define LUA_VSHRSTR makevariant(LUA_TSTRING, 0) /* short strings */
#define LUA_VLNGSTR makevariant(LUA_TSTRING, 1) /* long strings */
#define ttisstring(o) checktype((o), LUA_TSTRING)
#define ttisshrstring(o) checktag((o), ctb(LUA_VSHRSTR))
#define ttislngstring(o) checktag((o), ctb(LUA_VLNGSTR))
#define tsvalueraw(v) (gco2ts((v).gc))
#define tsvalue(o) check_exp(ttisstring(o), gco2ts(val_(o).gc))
#define setsvalue(L,obj,x) \
{ TValue *io = (obj); TString *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(x_->tt)); \
checkliveness(L,io); }
/* set a string to the stack */
#define setsvalue2s(L,o,s) setsvalue(L,s2v(o),s)
/* set a string to a new object */
#define setsvalue2n setsvalue
/*
** Header for a string value.
*/
typedef struct TString {
CommonHeader;
lu_byte extra; /* reserved words for short strings; "has hash" for longs */
lu_byte shrlen; /* length for short strings, 0xFF for long strings */
unsigned int hash;
union {
size_t lnglen; /* length for long strings */
struct TString *hnext; /* linked list for hash table */
} u;
char contents[1];
} TString;
/*
** Get the actual string (array of bytes) from a 'TString'. (Generic
** version and specialized versions for long and short strings.)
*/
#define getstr(ts) ((ts)->contents)
#define getlngstr(ts) check_exp((ts)->shrlen == 0xFF, (ts)->contents)
#define getshrstr(ts) check_exp((ts)->shrlen != 0xFF, (ts)->contents)
/* get string length from 'TString *s' */
#define tsslen(s) \
((s)->shrlen != 0xFF ? (s)->shrlen : (s)->u.lnglen)
/* }================================================================== */
/*
** {==================================================================
** Userdata
** ===================================================================
*/
/*
** Light userdata should be a variant of userdata, but for compatibility
** reasons they are also different types.
*/
#define LUA_VLIGHTUSERDATA makevariant(LUA_TLIGHTUSERDATA, 0)
#define LUA_VUSERDATA makevariant(LUA_TUSERDATA, 0)
#define ttislightuserdata(o) checktag((o), LUA_VLIGHTUSERDATA)
#define ttisfulluserdata(o) checktag((o), ctb(LUA_VUSERDATA))
#define pvalue(o) check_exp(ttislightuserdata(o), val_(o).p)
#define uvalue(o) check_exp(ttisfulluserdata(o), gco2u(val_(o).gc))
#define pvalueraw(v) ((v).p)
#define setpvalue(obj,x) \
{ TValue *io=(obj); val_(io).p=(x); settt_(io, LUA_VLIGHTUSERDATA); }
#define setuvalue(L,obj,x) \
{ TValue *io = (obj); Udata *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VUSERDATA)); \
checkliveness(L,io); }
/* Ensures that addresses after this type are always fully aligned. */
typedef union UValue {
TValue uv;
LUAI_MAXALIGN; /* ensures maximum alignment for udata bytes */
} UValue;
/*
** Header for userdata with user values;
** memory area follows the end of this structure.
*/
typedef struct Udata {
CommonHeader;
unsigned short nuvalue; /* number of user values */
size_t len; /* number of bytes */
struct Table *metatable;
GCObject *gclist;
UValue uv[1]; /* user values */
} Udata;
/*
** Header for userdata with no user values. These userdata do not need
** to be gray during GC, and therefore do not need a 'gclist' field.
** To simplify, the code always use 'Udata' for both kinds of userdata,
** making sure it never accesses 'gclist' on userdata with no user values.
** This structure here is used only to compute the correct size for
** this representation. (The 'bindata' field in its end ensures correct
** alignment for binary data following this header.)
*/
typedef struct Udata0 {
CommonHeader;
unsigned short nuvalue; /* number of user values */
size_t len; /* number of bytes */
struct Table *metatable;
union {LUAI_MAXALIGN;} bindata;
} Udata0;
/* compute the offset of the memory area of a userdata */
#define udatamemoffset(nuv) \
((nuv) == 0 ? offsetof(Udata0, bindata) \
: offsetof(Udata, uv) + (sizeof(UValue) * (nuv)))
/* get the address of the memory block inside 'Udata' */
#define getudatamem(u) (cast_charp(u) + udatamemoffset((u)->nuvalue))
/* compute the size of a userdata */
#define sizeudata(nuv,nb) (udatamemoffset(nuv) + (nb))
/* }================================================================== */
/*
** {==================================================================
** Prototypes
** ===================================================================
*/
#define LUA_VPROTO makevariant(LUA_TPROTO, 0)
/*
** Description of an upvalue for function prototypes
*/
typedef struct Upvaldesc {
TString *name; /* upvalue name (for debug information) */
lu_byte instack; /* whether it is in stack (register) */
lu_byte idx; /* index of upvalue (in stack or in outer function's list) */
lu_byte kind; /* kind of corresponding variable */
} Upvaldesc;
/*
** Description of a local variable for function prototypes
** (used for debug information)
*/
typedef struct LocVar {
TString *varname;
int startpc; /* first point where variable is active */
int endpc; /* first point where variable is dead */
} LocVar;
/*
** Associates the absolute line source for a given instruction ('pc').
** The array 'lineinfo' gives, for each instruction, the difference in
** lines from the previous instruction. When that difference does not
** fit into a byte, Lua saves the absolute line for that instruction.
** (Lua also saves the absolute line periodically, to speed up the
** computation of a line number: we can use binary search in the
** absolute-line array, but we must traverse the 'lineinfo' array
** linearly to compute a line.)
*/
typedef struct AbsLineInfo {
int pc;
int line;
} AbsLineInfo;
/*
** Function Prototypes
*/
typedef struct Proto {
CommonHeader;
lu_byte numparams; /* number of fixed (named) parameters */
lu_byte is_vararg;
lu_byte maxstacksize; /* number of registers needed by this function */
int sizeupvalues; /* size of 'upvalues' */
int sizek; /* size of 'k' */
int sizecode;
int sizelineinfo;
int sizep; /* size of 'p' */
int sizelocvars;
int sizeabslineinfo; /* size of 'abslineinfo' */
int linedefined; /* debug information */
int lastlinedefined; /* debug information */
TValue *k; /* constants used by the function */
Instruction *code; /* opcodes */
struct Proto **p; /* functions defined inside the function */
Upvaldesc *upvalues; /* upvalue information */
ls_byte *lineinfo; /* information about source lines (debug information) */
AbsLineInfo *abslineinfo; /* idem */
LocVar *locvars; /* information about local variables (debug information) */
TString *source; /* used for debug information */
GCObject *gclist;
} Proto;
/* }================================================================== */
/*
** {==================================================================
** Functions
** ===================================================================
*/
#define LUA_VUPVAL makevariant(LUA_TUPVAL, 0)
/* Variant tags for functions */
#define LUA_VLCL makevariant(LUA_TFUNCTION, 0) /* Lua closure */
#define LUA_VLCF makevariant(LUA_TFUNCTION, 1) /* light C function */
#define LUA_VCCL makevariant(LUA_TFUNCTION, 2) /* C closure */
#define ttisfunction(o) checktype(o, LUA_TFUNCTION)
#define ttisLclosure(o) checktag((o), ctb(LUA_VLCL))
#define ttislcf(o) checktag((o), LUA_VLCF)
#define ttisCclosure(o) checktag((o), ctb(LUA_VCCL))
#define ttisclosure(o) (ttisLclosure(o) || ttisCclosure(o))
#define isLfunction(o) ttisLclosure(o)
#define clvalue(o) check_exp(ttisclosure(o), gco2cl(val_(o).gc))
#define clLvalue(o) check_exp(ttisLclosure(o), gco2lcl(val_(o).gc))
#define fvalue(o) check_exp(ttislcf(o), val_(o).f)
#define clCvalue(o) check_exp(ttisCclosure(o), gco2ccl(val_(o).gc))
#define fvalueraw(v) ((v).f)
#define setclLvalue(L,obj,x) \
{ TValue *io = (obj); LClosure *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VLCL)); \
checkliveness(L,io); }
#define setclLvalue2s(L,o,cl) setclLvalue(L,s2v(o),cl)
#define setfvalue(obj,x) \
{ TValue *io=(obj); val_(io).f=(x); settt_(io, LUA_VLCF); }
#define setclCvalue(L,obj,x) \
{ TValue *io = (obj); CClosure *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VCCL)); \
checkliveness(L,io); }
/*
** Upvalues for Lua closures
*/
typedef struct UpVal {
CommonHeader;
union {
TValue *p; /* points to stack or to its own value */
ptrdiff_t offset; /* used while the stack is being reallocated */
} v;
union {
struct { /* (when open) */
struct UpVal *next; /* linked list */
struct UpVal **previous;
} open;
TValue value; /* the value (when closed) */
} u;
} UpVal;
#define ClosureHeader \
CommonHeader; lu_byte nupvalues; GCObject *gclist
typedef struct CClosure {
ClosureHeader;
lua_CFunction f;
TValue upvalue[1]; /* list of upvalues */
} CClosure;
typedef struct LClosure {
ClosureHeader;
struct Proto *p;
UpVal *upvals[1]; /* list of upvalues */
} LClosure;
typedef union Closure {
CClosure c;
LClosure l;
} Closure;
#define getproto(o) (clLvalue(o)->p)
/* }================================================================== */
/*
** {==================================================================
** Tables
** ===================================================================
*/
#define LUA_VTABLE makevariant(LUA_TTABLE, 0)
#define ttistable(o) checktag((o), ctb(LUA_VTABLE))
#define hvalue(o) check_exp(ttistable(o), gco2t(val_(o).gc))
#define sethvalue(L,obj,x) \
{ TValue *io = (obj); Table *x_ = (x); \
val_(io).gc = obj2gco(x_); settt_(io, ctb(LUA_VTABLE)); \
checkliveness(L,io); }
#define sethvalue2s(L,o,h) sethvalue(L,s2v(o),h)
/*
** Nodes for Hash tables: A pack of two TValue's (key-value pairs)
** plus a 'next' field to link colliding entries. The distribution
** of the key's fields ('key_tt' and 'key_val') not forming a proper
** 'TValue' allows for a smaller size for 'Node' both in 4-byte
** and 8-byte alignments.
*/
typedef union Node {
struct NodeKey {
TValuefields; /* fields for value */
lu_byte key_tt; /* key type */
int next; /* for chaining */
Value key_val; /* key value */
} u;
TValue i_val; /* direct access to node's value as a proper 'TValue' */
} Node;
/* copy a value into a key */
#define setnodekey(L,node,obj) \
{ Node *n_=(node); const TValue *io_=(obj); \
n_->u.key_val = io_->value_; n_->u.key_tt = io_->tt_; \
checkliveness(L,io_); }
/* copy a value from a key */
#define getnodekey(L,obj,node) \
{ TValue *io_=(obj); const Node *n_=(node); \
io_->value_ = n_->u.key_val; io_->tt_ = n_->u.key_tt; \
checkliveness(L,io_); }
/*
** About 'alimit': if 'isrealasize(t)' is true, then 'alimit' is the
** real size of 'array'. Otherwise, the real size of 'array' is the
** smallest power of two not smaller than 'alimit' (or zero iff 'alimit'
** is zero); 'alimit' is then used as a hint for #t.
*/
#define BITRAS (1 << 7)
#define isrealasize(t) (!((t)->flags & BITRAS))
#define setrealasize(t) ((t)->flags &= cast_byte(~BITRAS))
#define setnorealasize(t) ((t)->flags |= BITRAS)
typedef struct Table {
CommonHeader;
lu_byte flags; /* 1<<p means tagmethod(p) is not present */
lu_byte lsizenode; /* log2 of size of 'node' array */
unsigned int alimit; /* "limit" of 'array' array */
TValue *array; /* array part */
Node *node;
Node *lastfree; /* any free position is before this position */
struct Table *metatable;
GCObject *gclist;
} Table;
/*
** Macros to manipulate keys inserted in nodes
*/
#define keytt(node) ((node)->u.key_tt)
#define keyval(node) ((node)->u.key_val)
#define keyisnil(node) (keytt(node) == LUA_TNIL)
#define keyisinteger(node) (keytt(node) == LUA_VNUMINT)
#define keyival(node) (keyval(node).i)
#define keyisshrstr(node) (keytt(node) == ctb(LUA_VSHRSTR))
#define keystrval(node) (gco2ts(keyval(node).gc))
#define setnilkey(node) (keytt(node) = LUA_TNIL)
#define keyiscollectable(n) (keytt(n) & BIT_ISCOLLECTABLE)
#define gckey(n) (keyval(n).gc)
#define gckeyN(n) (keyiscollectable(n) ? gckey(n) : NULL)
/*
** Dead keys in tables have the tag DEADKEY but keep their original
** gcvalue. This distinguishes them from regular keys but allows them to
** be found when searched in a special way. ('next' needs that to find
** keys removed from a table during a traversal.)
*/
#define setdeadkey(node) (keytt(node) = LUA_TDEADKEY)
#define keyisdead(node) (keytt(node) == LUA_TDEADKEY)
/* }================================================================== */
/*
** 'module' operation for hashing (size is always a power of 2)
*/
#define lmod(s,size) \
(check_exp((size&(size-1))==0, (cast_int((s) & ((size)-1)))))
#define twoto(x) (1<<(x))
#define sizenode(t) (twoto((t)->lsizenode))
/* size of buffer for 'luaO_utf8esc' function */
#define UTF8BUFFSZ 8
LUAI_FUNC int luaO_utf8esc (char *buff, unsigned long x);
LUAI_FUNC int luaO_ceillog2 (unsigned int x);
LUAI_FUNC int luaO_rawarith (lua_State *L, int op, const TValue *p1,
const TValue *p2, TValue *res);
LUAI_FUNC void luaO_arith (lua_State *L, int op, const TValue *p1,
const TValue *p2, StkId res);
LUAI_FUNC size_t luaO_str2num (const char *s, TValue *o);
LUAI_FUNC int luaO_hexavalue (int c);
LUAI_FUNC void luaO_tostring (lua_State *L, TValue *obj);
LUAI_FUNC const char *luaO_pushvfstring (lua_State *L, const char *fmt,
va_list argp);
LUAI_FUNC const char *luaO_pushfstring (lua_State *L, const char *fmt, ...);
LUAI_FUNC void luaO_chunkid (char *out, const char *source, size_t srclen);
#endif

104
lua-5.4.7/src/lopcodes.c Normal file
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@ -0,0 +1,104 @@
/*
** $Id: lopcodes.c $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
#define lopcodes_c
#define LUA_CORE
#include "lprefix.h"
#include "lopcodes.h"
/* ORDER OP */
LUAI_DDEF const lu_byte luaP_opmodes[NUM_OPCODES] = {
/* MM OT IT T A mode opcode */
opmode(0, 0, 0, 0, 1, iABC) /* OP_MOVE */
,opmode(0, 0, 0, 0, 1, iAsBx) /* OP_LOADI */
,opmode(0, 0, 0, 0, 1, iAsBx) /* OP_LOADF */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_LOADK */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_LOADKX */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADFALSE */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_LFALSESKIP */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADTRUE */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_LOADNIL */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETUPVAL */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETUPVAL */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETTABUP */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETTABLE */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETI */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_GETFIELD */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETTABUP */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETTABLE */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETI */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_SETFIELD */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_NEWTABLE */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SELF */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDI */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADDK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SUBK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_MULK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_MODK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_POWK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_DIVK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_IDIVK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BANDK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BORK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BXORK */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHRI */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHLI */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_ADD */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SUB */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_MUL */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_MOD */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_POW */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_DIV */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_IDIV */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BAND */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BOR */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BXOR */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHL */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_SHR */
,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBIN */
,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBINI*/
,opmode(1, 0, 0, 0, 0, iABC) /* OP_MMBINK*/
,opmode(0, 0, 0, 0, 1, iABC) /* OP_UNM */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_BNOT */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_NOT */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_LEN */
,opmode(0, 0, 0, 0, 1, iABC) /* OP_CONCAT */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_CLOSE */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_TBC */
,opmode(0, 0, 0, 0, 0, isJ) /* OP_JMP */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQ */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_LT */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_LE */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQK */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_EQI */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_LTI */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_LEI */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_GTI */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_GEI */
,opmode(0, 0, 0, 1, 0, iABC) /* OP_TEST */
,opmode(0, 0, 0, 1, 1, iABC) /* OP_TESTSET */
,opmode(0, 1, 1, 0, 1, iABC) /* OP_CALL */
,opmode(0, 1, 1, 0, 1, iABC) /* OP_TAILCALL */
,opmode(0, 0, 1, 0, 0, iABC) /* OP_RETURN */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_RETURN0 */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_RETURN1 */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_FORLOOP */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_FORPREP */
,opmode(0, 0, 0, 0, 0, iABx) /* OP_TFORPREP */
,opmode(0, 0, 0, 0, 0, iABC) /* OP_TFORCALL */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_TFORLOOP */
,opmode(0, 0, 1, 0, 0, iABC) /* OP_SETLIST */
,opmode(0, 0, 0, 0, 1, iABx) /* OP_CLOSURE */
,opmode(0, 1, 0, 0, 1, iABC) /* OP_VARARG */
,opmode(0, 0, 1, 0, 1, iABC) /* OP_VARARGPREP */
,opmode(0, 0, 0, 0, 0, iAx) /* OP_EXTRAARG */
};

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/*
** $Id: lopcodes.h $
** Opcodes for Lua virtual machine
** See Copyright Notice in lua.h
*/
#ifndef lopcodes_h
#define lopcodes_h
#include "llimits.h"
/*===========================================================================
We assume that instructions are unsigned 32-bit integers.
All instructions have an opcode in the first 7 bits.
Instructions can have the following formats:
3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0
1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
iABC C(8) | B(8) |k| A(8) | Op(7) |
iABx Bx(17) | A(8) | Op(7) |
iAsBx sBx (signed)(17) | A(8) | Op(7) |
iAx Ax(25) | Op(7) |
isJ sJ (signed)(25) | Op(7) |
A signed argument is represented in excess K: the represented value is
the written unsigned value minus K, where K is half the maximum for the
corresponding unsigned argument.
===========================================================================*/
enum OpMode {iABC, iABx, iAsBx, iAx, isJ}; /* basic instruction formats */
/*
** size and position of opcode arguments.
*/
#define SIZE_C 8
#define SIZE_B 8
#define SIZE_Bx (SIZE_C + SIZE_B + 1)
#define SIZE_A 8
#define SIZE_Ax (SIZE_Bx + SIZE_A)
#define SIZE_sJ (SIZE_Bx + SIZE_A)
#define SIZE_OP 7
#define POS_OP 0
#define POS_A (POS_OP + SIZE_OP)
#define POS_k (POS_A + SIZE_A)
#define POS_B (POS_k + 1)
#define POS_C (POS_B + SIZE_B)
#define POS_Bx POS_k
#define POS_Ax POS_A
#define POS_sJ POS_A
/*
** limits for opcode arguments.
** we use (signed) 'int' to manipulate most arguments,
** so they must fit in ints.
*/
/* Check whether type 'int' has at least 'b' bits ('b' < 32) */
#define L_INTHASBITS(b) ((UINT_MAX >> ((b) - 1)) >= 1)
#if L_INTHASBITS(SIZE_Bx)
#define MAXARG_Bx ((1<<SIZE_Bx)-1)
#else
#define MAXARG_Bx MAX_INT
#endif
#define OFFSET_sBx (MAXARG_Bx>>1) /* 'sBx' is signed */
#if L_INTHASBITS(SIZE_Ax)
#define MAXARG_Ax ((1<<SIZE_Ax)-1)
#else
#define MAXARG_Ax MAX_INT
#endif
#if L_INTHASBITS(SIZE_sJ)
#define MAXARG_sJ ((1 << SIZE_sJ) - 1)
#else
#define MAXARG_sJ MAX_INT
#endif
#define OFFSET_sJ (MAXARG_sJ >> 1)
#define MAXARG_A ((1<<SIZE_A)-1)
#define MAXARG_B ((1<<SIZE_B)-1)
#define MAXARG_C ((1<<SIZE_C)-1)
#define OFFSET_sC (MAXARG_C >> 1)
#define int2sC(i) ((i) + OFFSET_sC)
#define sC2int(i) ((i) - OFFSET_sC)
/* creates a mask with 'n' 1 bits at position 'p' */
#define MASK1(n,p) ((~((~(Instruction)0)<<(n)))<<(p))
/* creates a mask with 'n' 0 bits at position 'p' */
#define MASK0(n,p) (~MASK1(n,p))
/*
** the following macros help to manipulate instructions
*/
#define GET_OPCODE(i) (cast(OpCode, ((i)>>POS_OP) & MASK1(SIZE_OP,0)))
#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
((cast(Instruction, o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
#define checkopm(i,m) (getOpMode(GET_OPCODE(i)) == m)
#define getarg(i,pos,size) (cast_int(((i)>>(pos)) & MASK1(size,0)))
#define setarg(i,v,pos,size) ((i) = (((i)&MASK0(size,pos)) | \
((cast(Instruction, v)<<pos)&MASK1(size,pos))))
#define GETARG_A(i) getarg(i, POS_A, SIZE_A)
#define SETARG_A(i,v) setarg(i, v, POS_A, SIZE_A)
#define GETARG_B(i) check_exp(checkopm(i, iABC), getarg(i, POS_B, SIZE_B))
#define GETARG_sB(i) sC2int(GETARG_B(i))
#define SETARG_B(i,v) setarg(i, v, POS_B, SIZE_B)
#define GETARG_C(i) check_exp(checkopm(i, iABC), getarg(i, POS_C, SIZE_C))
#define GETARG_sC(i) sC2int(GETARG_C(i))
#define SETARG_C(i,v) setarg(i, v, POS_C, SIZE_C)
#define TESTARG_k(i) check_exp(checkopm(i, iABC), (cast_int(((i) & (1u << POS_k)))))
#define GETARG_k(i) check_exp(checkopm(i, iABC), getarg(i, POS_k, 1))
#define SETARG_k(i,v) setarg(i, v, POS_k, 1)
#define GETARG_Bx(i) check_exp(checkopm(i, iABx), getarg(i, POS_Bx, SIZE_Bx))
#define SETARG_Bx(i,v) setarg(i, v, POS_Bx, SIZE_Bx)
#define GETARG_Ax(i) check_exp(checkopm(i, iAx), getarg(i, POS_Ax, SIZE_Ax))
#define SETARG_Ax(i,v) setarg(i, v, POS_Ax, SIZE_Ax)
#define GETARG_sBx(i) \
check_exp(checkopm(i, iAsBx), getarg(i, POS_Bx, SIZE_Bx) - OFFSET_sBx)
#define SETARG_sBx(i,b) SETARG_Bx((i),cast_uint((b)+OFFSET_sBx))
#define GETARG_sJ(i) \
check_exp(checkopm(i, isJ), getarg(i, POS_sJ, SIZE_sJ) - OFFSET_sJ)
#define SETARG_sJ(i,j) \
setarg(i, cast_uint((j)+OFFSET_sJ), POS_sJ, SIZE_sJ)
#define CREATE_ABCk(o,a,b,c,k) ((cast(Instruction, o)<<POS_OP) \
| (cast(Instruction, a)<<POS_A) \
| (cast(Instruction, b)<<POS_B) \
| (cast(Instruction, c)<<POS_C) \
| (cast(Instruction, k)<<POS_k))
#define CREATE_ABx(o,a,bc) ((cast(Instruction, o)<<POS_OP) \
| (cast(Instruction, a)<<POS_A) \
| (cast(Instruction, bc)<<POS_Bx))
#define CREATE_Ax(o,a) ((cast(Instruction, o)<<POS_OP) \
| (cast(Instruction, a)<<POS_Ax))
#define CREATE_sJ(o,j,k) ((cast(Instruction, o) << POS_OP) \
| (cast(Instruction, j) << POS_sJ) \
| (cast(Instruction, k) << POS_k))
#if !defined(MAXINDEXRK) /* (for debugging only) */
#define MAXINDEXRK MAXARG_B
#endif
/*
** invalid register that fits in 8 bits
*/
#define NO_REG MAXARG_A
/*
** R[x] - register
** K[x] - constant (in constant table)
** RK(x) == if k(i) then K[x] else R[x]
*/
/*
** Grep "ORDER OP" if you change these enums. Opcodes marked with a (*)
** has extra descriptions in the notes after the enumeration.
*/
typedef enum {
/*----------------------------------------------------------------------
name args description
------------------------------------------------------------------------*/
OP_MOVE,/* A B R[A] := R[B] */
OP_LOADI,/* A sBx R[A] := sBx */
OP_LOADF,/* A sBx R[A] := (lua_Number)sBx */
OP_LOADK,/* A Bx R[A] := K[Bx] */
OP_LOADKX,/* A R[A] := K[extra arg] */
OP_LOADFALSE,/* A R[A] := false */
OP_LFALSESKIP,/*A R[A] := false; pc++ (*) */
OP_LOADTRUE,/* A R[A] := true */
OP_LOADNIL,/* A B R[A], R[A+1], ..., R[A+B] := nil */
OP_GETUPVAL,/* A B R[A] := UpValue[B] */
OP_SETUPVAL,/* A B UpValue[B] := R[A] */
OP_GETTABUP,/* A B C R[A] := UpValue[B][K[C]:shortstring] */
OP_GETTABLE,/* A B C R[A] := R[B][R[C]] */
OP_GETI,/* A B C R[A] := R[B][C] */
OP_GETFIELD,/* A B C R[A] := R[B][K[C]:shortstring] */
OP_SETTABUP,/* A B C UpValue[A][K[B]:shortstring] := RK(C) */
OP_SETTABLE,/* A B C R[A][R[B]] := RK(C) */
OP_SETI,/* A B C R[A][B] := RK(C) */
OP_SETFIELD,/* A B C R[A][K[B]:shortstring] := RK(C) */
OP_NEWTABLE,/* A B C k R[A] := {} */
OP_SELF,/* A B C R[A+1] := R[B]; R[A] := R[B][RK(C):string] */
OP_ADDI,/* A B sC R[A] := R[B] + sC */
OP_ADDK,/* A B C R[A] := R[B] + K[C]:number */
OP_SUBK,/* A B C R[A] := R[B] - K[C]:number */
OP_MULK,/* A B C R[A] := R[B] * K[C]:number */
OP_MODK,/* A B C R[A] := R[B] % K[C]:number */
OP_POWK,/* A B C R[A] := R[B] ^ K[C]:number */
OP_DIVK,/* A B C R[A] := R[B] / K[C]:number */
OP_IDIVK,/* A B C R[A] := R[B] // K[C]:number */
OP_BANDK,/* A B C R[A] := R[B] & K[C]:integer */
OP_BORK,/* A B C R[A] := R[B] | K[C]:integer */
OP_BXORK,/* A B C R[A] := R[B] ~ K[C]:integer */
OP_SHRI,/* A B sC R[A] := R[B] >> sC */
OP_SHLI,/* A B sC R[A] := sC << R[B] */
OP_ADD,/* A B C R[A] := R[B] + R[C] */
OP_SUB,/* A B C R[A] := R[B] - R[C] */
OP_MUL,/* A B C R[A] := R[B] * R[C] */
OP_MOD,/* A B C R[A] := R[B] % R[C] */
OP_POW,/* A B C R[A] := R[B] ^ R[C] */
OP_DIV,/* A B C R[A] := R[B] / R[C] */
OP_IDIV,/* A B C R[A] := R[B] // R[C] */
OP_BAND,/* A B C R[A] := R[B] & R[C] */
OP_BOR,/* A B C R[A] := R[B] | R[C] */
OP_BXOR,/* A B C R[A] := R[B] ~ R[C] */
OP_SHL,/* A B C R[A] := R[B] << R[C] */
OP_SHR,/* A B C R[A] := R[B] >> R[C] */
OP_MMBIN,/* A B C call C metamethod over R[A] and R[B] (*) */
OP_MMBINI,/* A sB C k call C metamethod over R[A] and sB */
OP_MMBINK,/* A B C k call C metamethod over R[A] and K[B] */
OP_UNM,/* A B R[A] := -R[B] */
OP_BNOT,/* A B R[A] := ~R[B] */
OP_NOT,/* A B R[A] := not R[B] */
OP_LEN,/* A B R[A] := #R[B] (length operator) */
OP_CONCAT,/* A B R[A] := R[A].. ... ..R[A + B - 1] */
OP_CLOSE,/* A close all upvalues >= R[A] */
OP_TBC,/* A mark variable A "to be closed" */
OP_JMP,/* sJ pc += sJ */
OP_EQ,/* A B k if ((R[A] == R[B]) ~= k) then pc++ */
OP_LT,/* A B k if ((R[A] < R[B]) ~= k) then pc++ */
OP_LE,/* A B k if ((R[A] <= R[B]) ~= k) then pc++ */
OP_EQK,/* A B k if ((R[A] == K[B]) ~= k) then pc++ */
OP_EQI,/* A sB k if ((R[A] == sB) ~= k) then pc++ */
OP_LTI,/* A sB k if ((R[A] < sB) ~= k) then pc++ */
OP_LEI,/* A sB k if ((R[A] <= sB) ~= k) then pc++ */
OP_GTI,/* A sB k if ((R[A] > sB) ~= k) then pc++ */
OP_GEI,/* A sB k if ((R[A] >= sB) ~= k) then pc++ */
OP_TEST,/* A k if (not R[A] == k) then pc++ */
OP_TESTSET,/* A B k if (not R[B] == k) then pc++ else R[A] := R[B] (*) */
OP_CALL,/* A B C R[A], ... ,R[A+C-2] := R[A](R[A+1], ... ,R[A+B-1]) */
OP_TAILCALL,/* A B C k return R[A](R[A+1], ... ,R[A+B-1]) */
OP_RETURN,/* A B C k return R[A], ... ,R[A+B-2] (see note) */
OP_RETURN0,/* return */
OP_RETURN1,/* A return R[A] */
OP_FORLOOP,/* A Bx update counters; if loop continues then pc-=Bx; */
OP_FORPREP,/* A Bx <check values and prepare counters>;
if not to run then pc+=Bx+1; */
OP_TFORPREP,/* A Bx create upvalue for R[A + 3]; pc+=Bx */
OP_TFORCALL,/* A C R[A+4], ... ,R[A+3+C] := R[A](R[A+1], R[A+2]); */
OP_TFORLOOP,/* A Bx if R[A+2] ~= nil then { R[A]=R[A+2]; pc -= Bx } */
OP_SETLIST,/* A B C k R[A][C+i] := R[A+i], 1 <= i <= B */
OP_CLOSURE,/* A Bx R[A] := closure(KPROTO[Bx]) */
OP_VARARG,/* A C R[A], R[A+1], ..., R[A+C-2] = vararg */
OP_VARARGPREP,/*A (adjust vararg parameters) */
OP_EXTRAARG/* Ax extra (larger) argument for previous opcode */
} OpCode;
#define NUM_OPCODES ((int)(OP_EXTRAARG) + 1)
/*===========================================================================
Notes:
(*) Opcode OP_LFALSESKIP is used to convert a condition to a boolean
value, in a code equivalent to (not cond ? false : true). (It
produces false and skips the next instruction producing true.)
(*) Opcodes OP_MMBIN and variants follow each arithmetic and
bitwise opcode. If the operation succeeds, it skips this next
opcode. Otherwise, this opcode calls the corresponding metamethod.
(*) Opcode OP_TESTSET is used in short-circuit expressions that need
both to jump and to produce a value, such as (a = b or c).
(*) In OP_CALL, if (B == 0) then B = top - A. If (C == 0), then
'top' is set to last_result+1, so next open instruction (OP_CALL,
OP_RETURN*, OP_SETLIST) may use 'top'.
(*) In OP_VARARG, if (C == 0) then use actual number of varargs and
set top (like in OP_CALL with C == 0).
(*) In OP_RETURN, if (B == 0) then return up to 'top'.
(*) In OP_LOADKX and OP_NEWTABLE, the next instruction is always
OP_EXTRAARG.
(*) In OP_SETLIST, if (B == 0) then real B = 'top'; if k, then
real C = EXTRAARG _ C (the bits of EXTRAARG concatenated with the
bits of C).
(*) In OP_NEWTABLE, B is log2 of the hash size (which is always a
power of 2) plus 1, or zero for size zero. If not k, the array size
is C. Otherwise, the array size is EXTRAARG _ C.
(*) For comparisons, k specifies what condition the test should accept
(true or false).
(*) In OP_MMBINI/OP_MMBINK, k means the arguments were flipped
(the constant is the first operand).
(*) All 'skips' (pc++) assume that next instruction is a jump.
(*) In instructions OP_RETURN/OP_TAILCALL, 'k' specifies that the
function builds upvalues, which may need to be closed. C > 0 means
the function is vararg, so that its 'func' must be corrected before
returning; in this case, (C - 1) is its number of fixed parameters.
(*) In comparisons with an immediate operand, C signals whether the
original operand was a float. (It must be corrected in case of
metamethods.)
===========================================================================*/
/*
** masks for instruction properties. The format is:
** bits 0-2: op mode
** bit 3: instruction set register A
** bit 4: operator is a test (next instruction must be a jump)
** bit 5: instruction uses 'L->top' set by previous instruction (when B == 0)
** bit 6: instruction sets 'L->top' for next instruction (when C == 0)
** bit 7: instruction is an MM instruction (call a metamethod)
*/
LUAI_DDEC(const lu_byte luaP_opmodes[NUM_OPCODES];)
#define getOpMode(m) (cast(enum OpMode, luaP_opmodes[m] & 7))
#define testAMode(m) (luaP_opmodes[m] & (1 << 3))
#define testTMode(m) (luaP_opmodes[m] & (1 << 4))
#define testITMode(m) (luaP_opmodes[m] & (1 << 5))
#define testOTMode(m) (luaP_opmodes[m] & (1 << 6))
#define testMMMode(m) (luaP_opmodes[m] & (1 << 7))
/* "out top" (set top for next instruction) */
#define isOT(i) \
((testOTMode(GET_OPCODE(i)) && GETARG_C(i) == 0) || \
GET_OPCODE(i) == OP_TAILCALL)
/* "in top" (uses top from previous instruction) */
#define isIT(i) (testITMode(GET_OPCODE(i)) && GETARG_B(i) == 0)
#define opmode(mm,ot,it,t,a,m) \
(((mm) << 7) | ((ot) << 6) | ((it) << 5) | ((t) << 4) | ((a) << 3) | (m))
/* number of list items to accumulate before a SETLIST instruction */
#define LFIELDS_PER_FLUSH 50
#endif

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/*
** $Id: lopnames.h $
** Opcode names
** See Copyright Notice in lua.h
*/
#if !defined(lopnames_h)
#define lopnames_h
#include <stddef.h>
/* ORDER OP */
static const char *const opnames[] = {
"MOVE",
"LOADI",
"LOADF",
"LOADK",
"LOADKX",
"LOADFALSE",
"LFALSESKIP",
"LOADTRUE",
"LOADNIL",
"GETUPVAL",
"SETUPVAL",
"GETTABUP",
"GETTABLE",
"GETI",
"GETFIELD",
"SETTABUP",
"SETTABLE",
"SETI",
"SETFIELD",
"NEWTABLE",
"SELF",
"ADDI",
"ADDK",
"SUBK",
"MULK",
"MODK",
"POWK",
"DIVK",
"IDIVK",
"BANDK",
"BORK",
"BXORK",
"SHRI",
"SHLI",
"ADD",
"SUB",
"MUL",
"MOD",
"POW",
"DIV",
"IDIV",
"BAND",
"BOR",
"BXOR",
"SHL",
"SHR",
"MMBIN",
"MMBINI",
"MMBINK",
"UNM",
"BNOT",
"NOT",
"LEN",
"CONCAT",
"CLOSE",
"TBC",
"JMP",
"EQ",
"LT",
"LE",
"EQK",
"EQI",
"LTI",
"LEI",
"GTI",
"GEI",
"TEST",
"TESTSET",
"CALL",
"TAILCALL",
"RETURN",
"RETURN0",
"RETURN1",
"FORLOOP",
"FORPREP",
"TFORPREP",
"TFORCALL",
"TFORLOOP",
"SETLIST",
"CLOSURE",
"VARARG",
"VARARGPREP",
"EXTRAARG",
NULL
};
#endif

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/*
** $Id: loslib.c $
** Standard Operating System library
** See Copyright Notice in lua.h
*/
#define loslib_c
#define LUA_LIB
#include "lprefix.h"
#include <errno.h>
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
/*
** {==================================================================
** List of valid conversion specifiers for the 'strftime' function;
** options are grouped by length; group of length 2 start with '||'.
** ===================================================================
*/
#if !defined(LUA_STRFTIMEOPTIONS) /* { */
#if defined(LUA_USE_WINDOWS)
#define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYzZ%" \
"||" "#c#x#d#H#I#j#m#M#S#U#w#W#y#Y" /* two-char options */
#elif defined(LUA_USE_C89) /* ANSI C 89 (only 1-char options) */
#define LUA_STRFTIMEOPTIONS "aAbBcdHIjmMpSUwWxXyYZ%"
#else /* C99 specification */
#define LUA_STRFTIMEOPTIONS "aAbBcCdDeFgGhHIjmMnprRStTuUVwWxXyYzZ%" \
"||" "EcECExEXEyEY" "OdOeOHOIOmOMOSOuOUOVOwOWOy" /* two-char options */
#endif
#endif /* } */
/* }================================================================== */
/*
** {==================================================================
** Configuration for time-related stuff
** ===================================================================
*/
/*
** type to represent time_t in Lua
*/
#if !defined(LUA_NUMTIME) /* { */
#define l_timet lua_Integer
#define l_pushtime(L,t) lua_pushinteger(L,(lua_Integer)(t))
#define l_gettime(L,arg) luaL_checkinteger(L, arg)
#else /* }{ */
#define l_timet lua_Number
#define l_pushtime(L,t) lua_pushnumber(L,(lua_Number)(t))
#define l_gettime(L,arg) luaL_checknumber(L, arg)
#endif /* } */
#if !defined(l_gmtime) /* { */
/*
** By default, Lua uses gmtime/localtime, except when POSIX is available,
** where it uses gmtime_r/localtime_r
*/
#if defined(LUA_USE_POSIX) /* { */
#define l_gmtime(t,r) gmtime_r(t,r)
#define l_localtime(t,r) localtime_r(t,r)
#else /* }{ */
/* ISO C definitions */
#define l_gmtime(t,r) ((void)(r)->tm_sec, gmtime(t))
#define l_localtime(t,r) ((void)(r)->tm_sec, localtime(t))
#endif /* } */
#endif /* } */
/* }================================================================== */
/*
** {==================================================================
** Configuration for 'tmpnam':
** By default, Lua uses tmpnam except when POSIX is available, where
** it uses mkstemp.
** ===================================================================
*/
#if !defined(lua_tmpnam) /* { */
#if defined(LUA_USE_POSIX) /* { */
#include <unistd.h>
#define LUA_TMPNAMBUFSIZE 32
#if !defined(LUA_TMPNAMTEMPLATE)
#define LUA_TMPNAMTEMPLATE "/tmp/lua_XXXXXX"
#endif
#define lua_tmpnam(b,e) { \
strcpy(b, LUA_TMPNAMTEMPLATE); \
e = mkstemp(b); \
if (e != -1) close(e); \
e = (e == -1); }
#else /* }{ */
/* ISO C definitions */
#define LUA_TMPNAMBUFSIZE L_tmpnam
#define lua_tmpnam(b,e) { e = (tmpnam(b) == NULL); }
#endif /* } */
#endif /* } */
/* }================================================================== */
#if !defined(l_system)
#if defined(LUA_USE_IOS)
/* Despite claiming to be ISO C, iOS does not implement 'system'. */
#define l_system(cmd) ((cmd) == NULL ? 0 : -1)
#else
#define l_system(cmd) system(cmd) /* default definition */
#endif
#endif
static int os_execute (lua_State *L) {
const char *cmd = luaL_optstring(L, 1, NULL);
int stat;
errno = 0;
stat = l_system(cmd);
if (cmd != NULL)
return luaL_execresult(L, stat);
else {
lua_pushboolean(L, stat); /* true if there is a shell */
return 1;
}
}
static int os_remove (lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
errno = 0;
return luaL_fileresult(L, remove(filename) == 0, filename);
}
static int os_rename (lua_State *L) {
const char *fromname = luaL_checkstring(L, 1);
const char *toname = luaL_checkstring(L, 2);
errno = 0;
return luaL_fileresult(L, rename(fromname, toname) == 0, NULL);
}
static int os_tmpname (lua_State *L) {
char buff[LUA_TMPNAMBUFSIZE];
int err;
lua_tmpnam(buff, err);
if (l_unlikely(err))
return luaL_error(L, "unable to generate a unique filename");
lua_pushstring(L, buff);
return 1;
}
static int os_getenv (lua_State *L) {
lua_pushstring(L, getenv(luaL_checkstring(L, 1))); /* if NULL push nil */
return 1;
}
static int os_clock (lua_State *L) {
lua_pushnumber(L, ((lua_Number)clock())/(lua_Number)CLOCKS_PER_SEC);
return 1;
}
/*
** {======================================================
** Time/Date operations
** { year=%Y, month=%m, day=%d, hour=%H, min=%M, sec=%S,
** wday=%w+1, yday=%j, isdst=? }
** =======================================================
*/
/*
** About the overflow check: an overflow cannot occur when time
** is represented by a lua_Integer, because either lua_Integer is
** large enough to represent all int fields or it is not large enough
** to represent a time that cause a field to overflow. However, if
** times are represented as doubles and lua_Integer is int, then the
** time 0x1.e1853b0d184f6p+55 would cause an overflow when adding 1900
** to compute the year.
*/
static void setfield (lua_State *L, const char *key, int value, int delta) {
#if (defined(LUA_NUMTIME) && LUA_MAXINTEGER <= INT_MAX)
if (l_unlikely(value > LUA_MAXINTEGER - delta))
luaL_error(L, "field '%s' is out-of-bound", key);
#endif
lua_pushinteger(L, (lua_Integer)value + delta);
lua_setfield(L, -2, key);
}
static void setboolfield (lua_State *L, const char *key, int value) {
if (value < 0) /* undefined? */
return; /* does not set field */
lua_pushboolean(L, value);
lua_setfield(L, -2, key);
}
/*
** Set all fields from structure 'tm' in the table on top of the stack
*/
static void setallfields (lua_State *L, struct tm *stm) {
setfield(L, "year", stm->tm_year, 1900);
setfield(L, "month", stm->tm_mon, 1);
setfield(L, "day", stm->tm_mday, 0);
setfield(L, "hour", stm->tm_hour, 0);
setfield(L, "min", stm->tm_min, 0);
setfield(L, "sec", stm->tm_sec, 0);
setfield(L, "yday", stm->tm_yday, 1);
setfield(L, "wday", stm->tm_wday, 1);
setboolfield(L, "isdst", stm->tm_isdst);
}
static int getboolfield (lua_State *L, const char *key) {
int res;
res = (lua_getfield(L, -1, key) == LUA_TNIL) ? -1 : lua_toboolean(L, -1);
lua_pop(L, 1);
return res;
}
static int getfield (lua_State *L, const char *key, int d, int delta) {
int isnum;
int t = lua_getfield(L, -1, key); /* get field and its type */
lua_Integer res = lua_tointegerx(L, -1, &isnum);
if (!isnum) { /* field is not an integer? */
if (l_unlikely(t != LUA_TNIL)) /* some other value? */
return luaL_error(L, "field '%s' is not an integer", key);
else if (l_unlikely(d < 0)) /* absent field; no default? */
return luaL_error(L, "field '%s' missing in date table", key);
res = d;
}
else {
if (!(res >= 0 ? res - delta <= INT_MAX : INT_MIN + delta <= res))
return luaL_error(L, "field '%s' is out-of-bound", key);
res -= delta;
}
lua_pop(L, 1);
return (int)res;
}
static const char *checkoption (lua_State *L, const char *conv,
ptrdiff_t convlen, char *buff) {
const char *option = LUA_STRFTIMEOPTIONS;
int oplen = 1; /* length of options being checked */
for (; *option != '\0' && oplen <= convlen; option += oplen) {
if (*option == '|') /* next block? */
oplen++; /* will check options with next length (+1) */
else if (memcmp(conv, option, oplen) == 0) { /* match? */
memcpy(buff, conv, oplen); /* copy valid option to buffer */
buff[oplen] = '\0';
return conv + oplen; /* return next item */
}
}
luaL_argerror(L, 1,
lua_pushfstring(L, "invalid conversion specifier '%%%s'", conv));
return conv; /* to avoid warnings */
}
static time_t l_checktime (lua_State *L, int arg) {
l_timet t = l_gettime(L, arg);
luaL_argcheck(L, (time_t)t == t, arg, "time out-of-bounds");
return (time_t)t;
}
/* maximum size for an individual 'strftime' item */
#define SIZETIMEFMT 250
static int os_date (lua_State *L) {
size_t slen;
const char *s = luaL_optlstring(L, 1, "%c", &slen);
time_t t = luaL_opt(L, l_checktime, 2, time(NULL));
const char *se = s + slen; /* 's' end */
struct tm tmr, *stm;
if (*s == '!') { /* UTC? */
stm = l_gmtime(&t, &tmr);
s++; /* skip '!' */
}
else
stm = l_localtime(&t, &tmr);
if (stm == NULL) /* invalid date? */
return luaL_error(L,
"date result cannot be represented in this installation");
if (strcmp(s, "*t") == 0) {
lua_createtable(L, 0, 9); /* 9 = number of fields */
setallfields(L, stm);
}
else {
char cc[4]; /* buffer for individual conversion specifiers */
luaL_Buffer b;
cc[0] = '%';
luaL_buffinit(L, &b);
while (s < se) {
if (*s != '%') /* not a conversion specifier? */
luaL_addchar(&b, *s++);
else {
size_t reslen;
char *buff = luaL_prepbuffsize(&b, SIZETIMEFMT);
s++; /* skip '%' */
s = checkoption(L, s, se - s, cc + 1); /* copy specifier to 'cc' */
reslen = strftime(buff, SIZETIMEFMT, cc, stm);
luaL_addsize(&b, reslen);
}
}
luaL_pushresult(&b);
}
return 1;
}
static int os_time (lua_State *L) {
time_t t;
if (lua_isnoneornil(L, 1)) /* called without args? */
t = time(NULL); /* get current time */
else {
struct tm ts;
luaL_checktype(L, 1, LUA_TTABLE);
lua_settop(L, 1); /* make sure table is at the top */
ts.tm_year = getfield(L, "year", -1, 1900);
ts.tm_mon = getfield(L, "month", -1, 1);
ts.tm_mday = getfield(L, "day", -1, 0);
ts.tm_hour = getfield(L, "hour", 12, 0);
ts.tm_min = getfield(L, "min", 0, 0);
ts.tm_sec = getfield(L, "sec", 0, 0);
ts.tm_isdst = getboolfield(L, "isdst");
t = mktime(&ts);
setallfields(L, &ts); /* update fields with normalized values */
}
if (t != (time_t)(l_timet)t || t == (time_t)(-1))
return luaL_error(L,
"time result cannot be represented in this installation");
l_pushtime(L, t);
return 1;
}
static int os_difftime (lua_State *L) {
time_t t1 = l_checktime(L, 1);
time_t t2 = l_checktime(L, 2);
lua_pushnumber(L, (lua_Number)difftime(t1, t2));
return 1;
}
/* }====================================================== */
static int os_setlocale (lua_State *L) {
static const int cat[] = {LC_ALL, LC_COLLATE, LC_CTYPE, LC_MONETARY,
LC_NUMERIC, LC_TIME};
static const char *const catnames[] = {"all", "collate", "ctype", "monetary",
"numeric", "time", NULL};
const char *l = luaL_optstring(L, 1, NULL);
int op = luaL_checkoption(L, 2, "all", catnames);
lua_pushstring(L, setlocale(cat[op], l));
return 1;
}
static int os_exit (lua_State *L) {
int status;
if (lua_isboolean(L, 1))
status = (lua_toboolean(L, 1) ? EXIT_SUCCESS : EXIT_FAILURE);
else
status = (int)luaL_optinteger(L, 1, EXIT_SUCCESS);
if (lua_toboolean(L, 2))
lua_close(L);
if (L) exit(status); /* 'if' to avoid warnings for unreachable 'return' */
return 0;
}
static const luaL_Reg syslib[] = {
{"clock", os_clock},
{"date", os_date},
{"difftime", os_difftime},
{"execute", os_execute},
{"exit", os_exit},
{"getenv", os_getenv},
{"remove", os_remove},
{"rename", os_rename},
{"setlocale", os_setlocale},
{"time", os_time},
{"tmpname", os_tmpname},
{NULL, NULL}
};
/* }====================================================== */
LUAMOD_API int luaopen_os (lua_State *L) {
luaL_newlib(L, syslib);
return 1;
}

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lua-5.4.7/src/lparser.h Normal file
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/*
** $Id: lparser.h $
** Lua Parser
** See Copyright Notice in lua.h
*/
#ifndef lparser_h
#define lparser_h
#include "llimits.h"
#include "lobject.h"
#include "lzio.h"
/*
** Expression and variable descriptor.
** Code generation for variables and expressions can be delayed to allow
** optimizations; An 'expdesc' structure describes a potentially-delayed
** variable/expression. It has a description of its "main" value plus a
** list of conditional jumps that can also produce its value (generated
** by short-circuit operators 'and'/'or').
*/
/* kinds of variables/expressions */
typedef enum {
VVOID, /* when 'expdesc' describes the last expression of a list,
this kind means an empty list (so, no expression) */
VNIL, /* constant nil */
VTRUE, /* constant true */
VFALSE, /* constant false */
VK, /* constant in 'k'; info = index of constant in 'k' */
VKFLT, /* floating constant; nval = numerical float value */
VKINT, /* integer constant; ival = numerical integer value */
VKSTR, /* string constant; strval = TString address;
(string is fixed by the lexer) */
VNONRELOC, /* expression has its value in a fixed register;
info = result register */
VLOCAL, /* local variable; var.ridx = register index;
var.vidx = relative index in 'actvar.arr' */
VUPVAL, /* upvalue variable; info = index of upvalue in 'upvalues' */
VCONST, /* compile-time <const> variable;
info = absolute index in 'actvar.arr' */
VINDEXED, /* indexed variable;
ind.t = table register;
ind.idx = key's R index */
VINDEXUP, /* indexed upvalue;
ind.t = table upvalue;
ind.idx = key's K index */
VINDEXI, /* indexed variable with constant integer;
ind.t = table register;
ind.idx = key's value */
VINDEXSTR, /* indexed variable with literal string;
ind.t = table register;
ind.idx = key's K index */
VJMP, /* expression is a test/comparison;
info = pc of corresponding jump instruction */
VRELOC, /* expression can put result in any register;
info = instruction pc */
VCALL, /* expression is a function call; info = instruction pc */
VVARARG /* vararg expression; info = instruction pc */
} expkind;
#define vkisvar(k) (VLOCAL <= (k) && (k) <= VINDEXSTR)
#define vkisindexed(k) (VINDEXED <= (k) && (k) <= VINDEXSTR)
typedef struct expdesc {
expkind k;
union {
lua_Integer ival; /* for VKINT */
lua_Number nval; /* for VKFLT */
TString *strval; /* for VKSTR */
int info; /* for generic use */
struct { /* for indexed variables */
short idx; /* index (R or "long" K) */
lu_byte t; /* table (register or upvalue) */
} ind;
struct { /* for local variables */
lu_byte ridx; /* register holding the variable */
unsigned short vidx; /* compiler index (in 'actvar.arr') */
} var;
} u;
int t; /* patch list of 'exit when true' */
int f; /* patch list of 'exit when false' */
} expdesc;
/* kinds of variables */
#define VDKREG 0 /* regular */
#define RDKCONST 1 /* constant */
#define RDKTOCLOSE 2 /* to-be-closed */
#define RDKCTC 3 /* compile-time constant */
/* description of an active local variable */
typedef union Vardesc {
struct {
TValuefields; /* constant value (if it is a compile-time constant) */
lu_byte kind;
lu_byte ridx; /* register holding the variable */
short pidx; /* index of the variable in the Proto's 'locvars' array */
TString *name; /* variable name */
} vd;
TValue k; /* constant value (if any) */
} Vardesc;
/* description of pending goto statements and label statements */
typedef struct Labeldesc {
TString *name; /* label identifier */
int pc; /* position in code */
int line; /* line where it appeared */
lu_byte nactvar; /* number of active variables in that position */
lu_byte close; /* goto that escapes upvalues */
} Labeldesc;
/* list of labels or gotos */
typedef struct Labellist {
Labeldesc *arr; /* array */
int n; /* number of entries in use */
int size; /* array size */
} Labellist;
/* dynamic structures used by the parser */
typedef struct Dyndata {
struct { /* list of all active local variables */
Vardesc *arr;
int n;
int size;
} actvar;
Labellist gt; /* list of pending gotos */
Labellist label; /* list of active labels */
} Dyndata;
/* control of blocks */
struct BlockCnt; /* defined in lparser.c */
/* state needed to generate code for a given function */
typedef struct FuncState {
Proto *f; /* current function header */
struct FuncState *prev; /* enclosing function */
struct LexState *ls; /* lexical state */
struct BlockCnt *bl; /* chain of current blocks */
int pc; /* next position to code (equivalent to 'ncode') */
int lasttarget; /* 'label' of last 'jump label' */
int previousline; /* last line that was saved in 'lineinfo' */
int nk; /* number of elements in 'k' */
int np; /* number of elements in 'p' */
int nabslineinfo; /* number of elements in 'abslineinfo' */
int firstlocal; /* index of first local var (in Dyndata array) */
int firstlabel; /* index of first label (in 'dyd->label->arr') */
short ndebugvars; /* number of elements in 'f->locvars' */
lu_byte nactvar; /* number of active local variables */
lu_byte nups; /* number of upvalues */
lu_byte freereg; /* first free register */
lu_byte iwthabs; /* instructions issued since last absolute line info */
lu_byte needclose; /* function needs to close upvalues when returning */
} FuncState;
LUAI_FUNC int luaY_nvarstack (FuncState *fs);
LUAI_FUNC LClosure *luaY_parser (lua_State *L, ZIO *z, Mbuffer *buff,
Dyndata *dyd, const char *name, int firstchar);
#endif

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/*
** $Id: lprefix.h $
** Definitions for Lua code that must come before any other header file
** See Copyright Notice in lua.h
*/
#ifndef lprefix_h
#define lprefix_h
/*
** Allows POSIX/XSI stuff
*/
#if !defined(LUA_USE_C89) /* { */
#if !defined(_XOPEN_SOURCE)
#define _XOPEN_SOURCE 600
#elif _XOPEN_SOURCE == 0
#undef _XOPEN_SOURCE /* use -D_XOPEN_SOURCE=0 to undefine it */
#endif
/*
** Allows manipulation of large files in gcc and some other compilers
*/
#if !defined(LUA_32BITS) && !defined(_FILE_OFFSET_BITS)
#define _LARGEFILE_SOURCE 1
#define _FILE_OFFSET_BITS 64
#endif
#endif /* } */
/*
** Windows stuff
*/
#if defined(_WIN32) /* { */
#if !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS /* avoid warnings about ISO C functions */
#endif
#endif /* } */
#endif

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/*
** $Id: lstate.c $
** Global State
** See Copyright Notice in lua.h
*/
#define lstate_c
#define LUA_CORE
#include "lprefix.h"
#include <stddef.h>
#include <string.h>
#include "lua.h"
#include "lapi.h"
#include "ldebug.h"
#include "ldo.h"
#include "lfunc.h"
#include "lgc.h"
#include "llex.h"
#include "lmem.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "ltm.h"
/*
** thread state + extra space
*/
typedef struct LX {
lu_byte extra_[LUA_EXTRASPACE];
lua_State l;
} LX;
/*
** Main thread combines a thread state and the global state
*/
typedef struct LG {
LX l;
global_State g;
} LG;
#define fromstate(L) (cast(LX *, cast(lu_byte *, (L)) - offsetof(LX, l)))
/*
** A macro to create a "random" seed when a state is created;
** the seed is used to randomize string hashes.
*/
#if !defined(luai_makeseed)
#include <time.h>
/*
** Compute an initial seed with some level of randomness.
** Rely on Address Space Layout Randomization (if present) and
** current time.
*/
#define addbuff(b,p,e) \
{ size_t t = cast_sizet(e); \
memcpy(b + p, &t, sizeof(t)); p += sizeof(t); }
static unsigned int luai_makeseed (lua_State *L) {
char buff[3 * sizeof(size_t)];
unsigned int h = cast_uint(time(NULL));
int p = 0;
addbuff(buff, p, L); /* heap variable */
addbuff(buff, p, &h); /* local variable */
addbuff(buff, p, &lua_newstate); /* public function */
lua_assert(p == sizeof(buff));
return luaS_hash(buff, p, h);
}
#endif
/*
** set GCdebt to a new value keeping the value (totalbytes + GCdebt)
** invariant (and avoiding underflows in 'totalbytes')
*/
void luaE_setdebt (global_State *g, l_mem debt) {
l_mem tb = gettotalbytes(g);
lua_assert(tb > 0);
if (debt < tb - MAX_LMEM)
debt = tb - MAX_LMEM; /* will make 'totalbytes == MAX_LMEM' */
g->totalbytes = tb - debt;
g->GCdebt = debt;
}
LUA_API int lua_setcstacklimit (lua_State *L, unsigned int limit) {
UNUSED(L); UNUSED(limit);
return LUAI_MAXCCALLS; /* warning?? */
}
CallInfo *luaE_extendCI (lua_State *L) {
CallInfo *ci;
lua_assert(L->ci->next == NULL);
ci = luaM_new(L, CallInfo);
lua_assert(L->ci->next == NULL);
L->ci->next = ci;
ci->previous = L->ci;
ci->next = NULL;
ci->u.l.trap = 0;
L->nci++;
return ci;
}
/*
** free all CallInfo structures not in use by a thread
*/
static void freeCI (lua_State *L) {
CallInfo *ci = L->ci;
CallInfo *next = ci->next;
ci->next = NULL;
while ((ci = next) != NULL) {
next = ci->next;
luaM_free(L, ci);
L->nci--;
}
}
/*
** free half of the CallInfo structures not in use by a thread,
** keeping the first one.
*/
void luaE_shrinkCI (lua_State *L) {
CallInfo *ci = L->ci->next; /* first free CallInfo */
CallInfo *next;
if (ci == NULL)
return; /* no extra elements */
while ((next = ci->next) != NULL) { /* two extra elements? */
CallInfo *next2 = next->next; /* next's next */
ci->next = next2; /* remove next from the list */
L->nci--;
luaM_free(L, next); /* free next */
if (next2 == NULL)
break; /* no more elements */
else {
next2->previous = ci;
ci = next2; /* continue */
}
}
}
/*
** Called when 'getCcalls(L)' larger or equal to LUAI_MAXCCALLS.
** If equal, raises an overflow error. If value is larger than
** LUAI_MAXCCALLS (which means it is handling an overflow) but
** not much larger, does not report an error (to allow overflow
** handling to work).
*/
void luaE_checkcstack (lua_State *L) {
if (getCcalls(L) == LUAI_MAXCCALLS)
luaG_runerror(L, "C stack overflow");
else if (getCcalls(L) >= (LUAI_MAXCCALLS / 10 * 11))
luaD_throw(L, LUA_ERRERR); /* error while handling stack error */
}
LUAI_FUNC void luaE_incCstack (lua_State *L) {
L->nCcalls++;
if (l_unlikely(getCcalls(L) >= LUAI_MAXCCALLS))
luaE_checkcstack(L);
}
static void stack_init (lua_State *L1, lua_State *L) {
int i; CallInfo *ci;
/* initialize stack array */
L1->stack.p = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, StackValue);
L1->tbclist.p = L1->stack.p;
for (i = 0; i < BASIC_STACK_SIZE + EXTRA_STACK; i++)
setnilvalue(s2v(L1->stack.p + i)); /* erase new stack */
L1->top.p = L1->stack.p;
L1->stack_last.p = L1->stack.p + BASIC_STACK_SIZE;
/* initialize first ci */
ci = &L1->base_ci;
ci->next = ci->previous = NULL;
ci->callstatus = CIST_C;
ci->func.p = L1->top.p;
ci->u.c.k = NULL;
ci->nresults = 0;
setnilvalue(s2v(L1->top.p)); /* 'function' entry for this 'ci' */
L1->top.p++;
ci->top.p = L1->top.p + LUA_MINSTACK;
L1->ci = ci;
}
static void freestack (lua_State *L) {
if (L->stack.p == NULL)
return; /* stack not completely built yet */
L->ci = &L->base_ci; /* free the entire 'ci' list */
freeCI(L);
lua_assert(L->nci == 0);
luaM_freearray(L, L->stack.p, stacksize(L) + EXTRA_STACK); /* free stack */
}
/*
** Create registry table and its predefined values
*/
static void init_registry (lua_State *L, global_State *g) {
/* create registry */
Table *registry = luaH_new(L);
sethvalue(L, &g->l_registry, registry);
luaH_resize(L, registry, LUA_RIDX_LAST, 0);
/* registry[LUA_RIDX_MAINTHREAD] = L */
setthvalue(L, &registry->array[LUA_RIDX_MAINTHREAD - 1], L);
/* registry[LUA_RIDX_GLOBALS] = new table (table of globals) */
sethvalue(L, &registry->array[LUA_RIDX_GLOBALS - 1], luaH_new(L));
}
/*
** open parts of the state that may cause memory-allocation errors.
*/
static void f_luaopen (lua_State *L, void *ud) {
global_State *g = G(L);
UNUSED(ud);
stack_init(L, L); /* init stack */
init_registry(L, g);
luaS_init(L);
luaT_init(L);
luaX_init(L);
g->gcstp = 0; /* allow gc */
setnilvalue(&g->nilvalue); /* now state is complete */
luai_userstateopen(L);
}
/*
** preinitialize a thread with consistent values without allocating
** any memory (to avoid errors)
*/
static void preinit_thread (lua_State *L, global_State *g) {
G(L) = g;
L->stack.p = NULL;
L->ci = NULL;
L->nci = 0;
L->twups = L; /* thread has no upvalues */
L->nCcalls = 0;
L->errorJmp = NULL;
L->hook = NULL;
L->hookmask = 0;
L->basehookcount = 0;
L->allowhook = 1;
resethookcount(L);
L->openupval = NULL;
L->status = LUA_OK;
L->errfunc = 0;
L->oldpc = 0;
}
static void close_state (lua_State *L) {
global_State *g = G(L);
if (!completestate(g)) /* closing a partially built state? */
luaC_freeallobjects(L); /* just collect its objects */
else { /* closing a fully built state */
L->ci = &L->base_ci; /* unwind CallInfo list */
luaD_closeprotected(L, 1, LUA_OK); /* close all upvalues */
luaC_freeallobjects(L); /* collect all objects */
luai_userstateclose(L);
}
luaM_freearray(L, G(L)->strt.hash, G(L)->strt.size);
freestack(L);
lua_assert(gettotalbytes(g) == sizeof(LG));
(*g->frealloc)(g->ud, fromstate(L), sizeof(LG), 0); /* free main block */
}
LUA_API lua_State *lua_newthread (lua_State *L) {
global_State *g = G(L);
GCObject *o;
lua_State *L1;
lua_lock(L);
luaC_checkGC(L);
/* create new thread */
o = luaC_newobjdt(L, LUA_TTHREAD, sizeof(LX), offsetof(LX, l));
L1 = gco2th(o);
/* anchor it on L stack */
setthvalue2s(L, L->top.p, L1);
api_incr_top(L);
preinit_thread(L1, g);
L1->hookmask = L->hookmask;
L1->basehookcount = L->basehookcount;
L1->hook = L->hook;
resethookcount(L1);
/* initialize L1 extra space */
memcpy(lua_getextraspace(L1), lua_getextraspace(g->mainthread),
LUA_EXTRASPACE);
luai_userstatethread(L, L1);
stack_init(L1, L); /* init stack */
lua_unlock(L);
return L1;
}
void luaE_freethread (lua_State *L, lua_State *L1) {
LX *l = fromstate(L1);
luaF_closeupval(L1, L1->stack.p); /* close all upvalues */
lua_assert(L1->openupval == NULL);
luai_userstatefree(L, L1);
freestack(L1);
luaM_free(L, l);
}
int luaE_resetthread (lua_State *L, int status) {
CallInfo *ci = L->ci = &L->base_ci; /* unwind CallInfo list */
setnilvalue(s2v(L->stack.p)); /* 'function' entry for basic 'ci' */
ci->func.p = L->stack.p;
ci->callstatus = CIST_C;
if (status == LUA_YIELD)
status = LUA_OK;
L->status = LUA_OK; /* so it can run __close metamethods */
status = luaD_closeprotected(L, 1, status);
if (status != LUA_OK) /* errors? */
luaD_seterrorobj(L, status, L->stack.p + 1);
else
L->top.p = L->stack.p + 1;
ci->top.p = L->top.p + LUA_MINSTACK;
luaD_reallocstack(L, cast_int(ci->top.p - L->stack.p), 0);
return status;
}
LUA_API int lua_closethread (lua_State *L, lua_State *from) {
int status;
lua_lock(L);
L->nCcalls = (from) ? getCcalls(from) : 0;
status = luaE_resetthread(L, L->status);
lua_unlock(L);
return status;
}
/*
** Deprecated! Use 'lua_closethread' instead.
*/
LUA_API int lua_resetthread (lua_State *L) {
return lua_closethread(L, NULL);
}
LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
int i;
lua_State *L;
global_State *g;
LG *l = cast(LG *, (*f)(ud, NULL, LUA_TTHREAD, sizeof(LG)));
if (l == NULL) return NULL;
L = &l->l.l;
g = &l->g;
L->tt = LUA_VTHREAD;
g->currentwhite = bitmask(WHITE0BIT);
L->marked = luaC_white(g);
preinit_thread(L, g);
g->allgc = obj2gco(L); /* by now, only object is the main thread */
L->next = NULL;
incnny(L); /* main thread is always non yieldable */
g->frealloc = f;
g->ud = ud;
g->warnf = NULL;
g->ud_warn = NULL;
g->mainthread = L;
g->seed = luai_makeseed(L);
g->gcstp = GCSTPGC; /* no GC while building state */
g->strt.size = g->strt.nuse = 0;
g->strt.hash = NULL;
setnilvalue(&g->l_registry);
g->panic = NULL;
g->gcstate = GCSpause;
g->gckind = KGC_INC;
g->gcstopem = 0;
g->gcemergency = 0;
g->finobj = g->tobefnz = g->fixedgc = NULL;
g->firstold1 = g->survival = g->old1 = g->reallyold = NULL;
g->finobjsur = g->finobjold1 = g->finobjrold = NULL;
g->sweepgc = NULL;
g->gray = g->grayagain = NULL;
g->weak = g->ephemeron = g->allweak = NULL;
g->twups = NULL;
g->totalbytes = sizeof(LG);
g->GCdebt = 0;
g->lastatomic = 0;
setivalue(&g->nilvalue, 0); /* to signal that state is not yet built */
setgcparam(g->gcpause, LUAI_GCPAUSE);
setgcparam(g->gcstepmul, LUAI_GCMUL);
g->gcstepsize = LUAI_GCSTEPSIZE;
setgcparam(g->genmajormul, LUAI_GENMAJORMUL);
g->genminormul = LUAI_GENMINORMUL;
for (i=0; i < LUA_NUMTAGS; i++) g->mt[i] = NULL;
if (luaD_rawrunprotected(L, f_luaopen, NULL) != LUA_OK) {
/* memory allocation error: free partial state */
close_state(L);
L = NULL;
}
return L;
}
LUA_API void lua_close (lua_State *L) {
lua_lock(L);
L = G(L)->mainthread; /* only the main thread can be closed */
close_state(L);
}
void luaE_warning (lua_State *L, const char *msg, int tocont) {
lua_WarnFunction wf = G(L)->warnf;
if (wf != NULL)
wf(G(L)->ud_warn, msg, tocont);
}
/*
** Generate a warning from an error message
*/
void luaE_warnerror (lua_State *L, const char *where) {
TValue *errobj = s2v(L->top.p - 1); /* error object */
const char *msg = (ttisstring(errobj))
? getstr(tsvalue(errobj))
: "error object is not a string";
/* produce warning "error in %s (%s)" (where, msg) */
luaE_warning(L, "error in ", 1);
luaE_warning(L, where, 1);
luaE_warning(L, " (", 1);
luaE_warning(L, msg, 1);
luaE_warning(L, ")", 0);
}

408
lua-5.4.7/src/lstate.h Normal file
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@ -0,0 +1,408 @@
/*
** $Id: lstate.h $
** Global State
** See Copyright Notice in lua.h
*/
#ifndef lstate_h
#define lstate_h
#include "lua.h"
/* Some header files included here need this definition */
typedef struct CallInfo CallInfo;
#include "lobject.h"
#include "ltm.h"
#include "lzio.h"
/*
** Some notes about garbage-collected objects: All objects in Lua must
** be kept somehow accessible until being freed, so all objects always
** belong to one (and only one) of these lists, using field 'next' of
** the 'CommonHeader' for the link:
**
** 'allgc': all objects not marked for finalization;
** 'finobj': all objects marked for finalization;
** 'tobefnz': all objects ready to be finalized;
** 'fixedgc': all objects that are not to be collected (currently
** only small strings, such as reserved words).
**
** For the generational collector, some of these lists have marks for
** generations. Each mark points to the first element in the list for
** that particular generation; that generation goes until the next mark.
**
** 'allgc' -> 'survival': new objects;
** 'survival' -> 'old': objects that survived one collection;
** 'old1' -> 'reallyold': objects that became old in last collection;
** 'reallyold' -> NULL: objects old for more than one cycle.
**
** 'finobj' -> 'finobjsur': new objects marked for finalization;
** 'finobjsur' -> 'finobjold1': survived """";
** 'finobjold1' -> 'finobjrold': just old """";
** 'finobjrold' -> NULL: really old """".
**
** All lists can contain elements older than their main ages, due
** to 'luaC_checkfinalizer' and 'udata2finalize', which move
** objects between the normal lists and the "marked for finalization"
** lists. Moreover, barriers can age young objects in young lists as
** OLD0, which then become OLD1. However, a list never contains
** elements younger than their main ages.
**
** The generational collector also uses a pointer 'firstold1', which
** points to the first OLD1 object in the list. It is used to optimize
** 'markold'. (Potentially OLD1 objects can be anywhere between 'allgc'
** and 'reallyold', but often the list has no OLD1 objects or they are
** after 'old1'.) Note the difference between it and 'old1':
** 'firstold1': no OLD1 objects before this point; there can be all
** ages after it.
** 'old1': no objects younger than OLD1 after this point.
*/
/*
** Moreover, there is another set of lists that control gray objects.
** These lists are linked by fields 'gclist'. (All objects that
** can become gray have such a field. The field is not the same
** in all objects, but it always has this name.) Any gray object
** must belong to one of these lists, and all objects in these lists
** must be gray (with two exceptions explained below):
**
** 'gray': regular gray objects, still waiting to be visited.
** 'grayagain': objects that must be revisited at the atomic phase.
** That includes
** - black objects got in a write barrier;
** - all kinds of weak tables during propagation phase;
** - all threads.
** 'weak': tables with weak values to be cleared;
** 'ephemeron': ephemeron tables with white->white entries;
** 'allweak': tables with weak keys and/or weak values to be cleared.
**
** The exceptions to that "gray rule" are:
** - TOUCHED2 objects in generational mode stay in a gray list (because
** they must be visited again at the end of the cycle), but they are
** marked black because assignments to them must activate barriers (to
** move them back to TOUCHED1).
** - Open upvales are kept gray to avoid barriers, but they stay out
** of gray lists. (They don't even have a 'gclist' field.)
*/
/*
** About 'nCcalls': This count has two parts: the lower 16 bits counts
** the number of recursive invocations in the C stack; the higher
** 16 bits counts the number of non-yieldable calls in the stack.
** (They are together so that we can change and save both with one
** instruction.)
*/
/* true if this thread does not have non-yieldable calls in the stack */
#define yieldable(L) (((L)->nCcalls & 0xffff0000) == 0)
/* real number of C calls */
#define getCcalls(L) ((L)->nCcalls & 0xffff)
/* Increment the number of non-yieldable calls */
#define incnny(L) ((L)->nCcalls += 0x10000)
/* Decrement the number of non-yieldable calls */
#define decnny(L) ((L)->nCcalls -= 0x10000)
/* Non-yieldable call increment */
#define nyci (0x10000 | 1)
struct lua_longjmp; /* defined in ldo.c */
/*
** Atomic type (relative to signals) to better ensure that 'lua_sethook'
** is thread safe
*/
#if !defined(l_signalT)
#include <signal.h>
#define l_signalT sig_atomic_t
#endif
/*
** Extra stack space to handle TM calls and some other extras. This
** space is not included in 'stack_last'. It is used only to avoid stack
** checks, either because the element will be promptly popped or because
** there will be a stack check soon after the push. Function frames
** never use this extra space, so it does not need to be kept clean.
*/
#define EXTRA_STACK 5
#define BASIC_STACK_SIZE (2*LUA_MINSTACK)
#define stacksize(th) cast_int((th)->stack_last.p - (th)->stack.p)
/* kinds of Garbage Collection */
#define KGC_INC 0 /* incremental gc */
#define KGC_GEN 1 /* generational gc */
typedef struct stringtable {
TString **hash;
int nuse; /* number of elements */
int size;
} stringtable;
/*
** Information about a call.
** About union 'u':
** - field 'l' is used only for Lua functions;
** - field 'c' is used only for C functions.
** About union 'u2':
** - field 'funcidx' is used only by C functions while doing a
** protected call;
** - field 'nyield' is used only while a function is "doing" an
** yield (from the yield until the next resume);
** - field 'nres' is used only while closing tbc variables when
** returning from a function;
** - field 'transferinfo' is used only during call/returnhooks,
** before the function starts or after it ends.
*/
struct CallInfo {
StkIdRel func; /* function index in the stack */
StkIdRel top; /* top for this function */
struct CallInfo *previous, *next; /* dynamic call link */
union {
struct { /* only for Lua functions */
const Instruction *savedpc;
volatile l_signalT trap; /* function is tracing lines/counts */
int nextraargs; /* # of extra arguments in vararg functions */
} l;
struct { /* only for C functions */
lua_KFunction k; /* continuation in case of yields */
ptrdiff_t old_errfunc;
lua_KContext ctx; /* context info. in case of yields */
} c;
} u;
union {
int funcidx; /* called-function index */
int nyield; /* number of values yielded */
int nres; /* number of values returned */
struct { /* info about transferred values (for call/return hooks) */
unsigned short ftransfer; /* offset of first value transferred */
unsigned short ntransfer; /* number of values transferred */
} transferinfo;
} u2;
short nresults; /* expected number of results from this function */
unsigned short callstatus;
};
/*
** Bits in CallInfo status
*/
#define CIST_OAH (1<<0) /* original value of 'allowhook' */
#define CIST_C (1<<1) /* call is running a C function */
#define CIST_FRESH (1<<2) /* call is on a fresh "luaV_execute" frame */
#define CIST_HOOKED (1<<3) /* call is running a debug hook */
#define CIST_YPCALL (1<<4) /* doing a yieldable protected call */
#define CIST_TAIL (1<<5) /* call was tail called */
#define CIST_HOOKYIELD (1<<6) /* last hook called yielded */
#define CIST_FIN (1<<7) /* function "called" a finalizer */
#define CIST_TRAN (1<<8) /* 'ci' has transfer information */
#define CIST_CLSRET (1<<9) /* function is closing tbc variables */
/* Bits 10-12 are used for CIST_RECST (see below) */
#define CIST_RECST 10
#if defined(LUA_COMPAT_LT_LE)
#define CIST_LEQ (1<<13) /* using __lt for __le */
#endif
/*
** Field CIST_RECST stores the "recover status", used to keep the error
** status while closing to-be-closed variables in coroutines, so that
** Lua can correctly resume after an yield from a __close method called
** because of an error. (Three bits are enough for error status.)
*/
#define getcistrecst(ci) (((ci)->callstatus >> CIST_RECST) & 7)
#define setcistrecst(ci,st) \
check_exp(((st) & 7) == (st), /* status must fit in three bits */ \
((ci)->callstatus = ((ci)->callstatus & ~(7 << CIST_RECST)) \
| ((st) << CIST_RECST)))
/* active function is a Lua function */
#define isLua(ci) (!((ci)->callstatus & CIST_C))
/* call is running Lua code (not a hook) */
#define isLuacode(ci) (!((ci)->callstatus & (CIST_C | CIST_HOOKED)))
/* assume that CIST_OAH has offset 0 and that 'v' is strictly 0/1 */
#define setoah(st,v) ((st) = ((st) & ~CIST_OAH) | (v))
#define getoah(st) ((st) & CIST_OAH)
/*
** 'global state', shared by all threads of this state
*/
typedef struct global_State {
lua_Alloc frealloc; /* function to reallocate memory */
void *ud; /* auxiliary data to 'frealloc' */
l_mem totalbytes; /* number of bytes currently allocated - GCdebt */
l_mem GCdebt; /* bytes allocated not yet compensated by the collector */
lu_mem GCestimate; /* an estimate of the non-garbage memory in use */
lu_mem lastatomic; /* see function 'genstep' in file 'lgc.c' */
stringtable strt; /* hash table for strings */
TValue l_registry;
TValue nilvalue; /* a nil value */
unsigned int seed; /* randomized seed for hashes */
lu_byte currentwhite;
lu_byte gcstate; /* state of garbage collector */
lu_byte gckind; /* kind of GC running */
lu_byte gcstopem; /* stops emergency collections */
lu_byte genminormul; /* control for minor generational collections */
lu_byte genmajormul; /* control for major generational collections */
lu_byte gcstp; /* control whether GC is running */
lu_byte gcemergency; /* true if this is an emergency collection */
lu_byte gcpause; /* size of pause between successive GCs */
lu_byte gcstepmul; /* GC "speed" */
lu_byte gcstepsize; /* (log2 of) GC granularity */
GCObject *allgc; /* list of all collectable objects */
GCObject **sweepgc; /* current position of sweep in list */
GCObject *finobj; /* list of collectable objects with finalizers */
GCObject *gray; /* list of gray objects */
GCObject *grayagain; /* list of objects to be traversed atomically */
GCObject *weak; /* list of tables with weak values */
GCObject *ephemeron; /* list of ephemeron tables (weak keys) */
GCObject *allweak; /* list of all-weak tables */
GCObject *tobefnz; /* list of userdata to be GC */
GCObject *fixedgc; /* list of objects not to be collected */
/* fields for generational collector */
GCObject *survival; /* start of objects that survived one GC cycle */
GCObject *old1; /* start of old1 objects */
GCObject *reallyold; /* objects more than one cycle old ("really old") */
GCObject *firstold1; /* first OLD1 object in the list (if any) */
GCObject *finobjsur; /* list of survival objects with finalizers */
GCObject *finobjold1; /* list of old1 objects with finalizers */
GCObject *finobjrold; /* list of really old objects with finalizers */
struct lua_State *twups; /* list of threads with open upvalues */
lua_CFunction panic; /* to be called in unprotected errors */
struct lua_State *mainthread;
TString *memerrmsg; /* message for memory-allocation errors */
TString *tmname[TM_N]; /* array with tag-method names */
struct Table *mt[LUA_NUMTYPES]; /* metatables for basic types */
TString *strcache[STRCACHE_N][STRCACHE_M]; /* cache for strings in API */
lua_WarnFunction warnf; /* warning function */
void *ud_warn; /* auxiliary data to 'warnf' */
} global_State;
/*
** 'per thread' state
*/
struct lua_State {
CommonHeader;
lu_byte status;
lu_byte allowhook;
unsigned short nci; /* number of items in 'ci' list */
StkIdRel top; /* first free slot in the stack */
global_State *l_G;
CallInfo *ci; /* call info for current function */
StkIdRel stack_last; /* end of stack (last element + 1) */
StkIdRel stack; /* stack base */
UpVal *openupval; /* list of open upvalues in this stack */
StkIdRel tbclist; /* list of to-be-closed variables */
GCObject *gclist;
struct lua_State *twups; /* list of threads with open upvalues */
struct lua_longjmp *errorJmp; /* current error recover point */
CallInfo base_ci; /* CallInfo for first level (C calling Lua) */
volatile lua_Hook hook;
ptrdiff_t errfunc; /* current error handling function (stack index) */
l_uint32 nCcalls; /* number of nested (non-yieldable | C) calls */
int oldpc; /* last pc traced */
int basehookcount;
int hookcount;
volatile l_signalT hookmask;
};
#define G(L) (L->l_G)
/*
** 'g->nilvalue' being a nil value flags that the state was completely
** build.
*/
#define completestate(g) ttisnil(&g->nilvalue)
/*
** Union of all collectable objects (only for conversions)
** ISO C99, 6.5.2.3 p.5:
** "if a union contains several structures that share a common initial
** sequence [...], and if the union object currently contains one
** of these structures, it is permitted to inspect the common initial
** part of any of them anywhere that a declaration of the complete type
** of the union is visible."
*/
union GCUnion {
GCObject gc; /* common header */
struct TString ts;
struct Udata u;
union Closure cl;
struct Table h;
struct Proto p;
struct lua_State th; /* thread */
struct UpVal upv;
};
/*
** ISO C99, 6.7.2.1 p.14:
** "A pointer to a union object, suitably converted, points to each of
** its members [...], and vice versa."
*/
#define cast_u(o) cast(union GCUnion *, (o))
/* macros to convert a GCObject into a specific value */
#define gco2ts(o) \
check_exp(novariant((o)->tt) == LUA_TSTRING, &((cast_u(o))->ts))
#define gco2u(o) check_exp((o)->tt == LUA_VUSERDATA, &((cast_u(o))->u))
#define gco2lcl(o) check_exp((o)->tt == LUA_VLCL, &((cast_u(o))->cl.l))
#define gco2ccl(o) check_exp((o)->tt == LUA_VCCL, &((cast_u(o))->cl.c))
#define gco2cl(o) \
check_exp(novariant((o)->tt) == LUA_TFUNCTION, &((cast_u(o))->cl))
#define gco2t(o) check_exp((o)->tt == LUA_VTABLE, &((cast_u(o))->h))
#define gco2p(o) check_exp((o)->tt == LUA_VPROTO, &((cast_u(o))->p))
#define gco2th(o) check_exp((o)->tt == LUA_VTHREAD, &((cast_u(o))->th))
#define gco2upv(o) check_exp((o)->tt == LUA_VUPVAL, &((cast_u(o))->upv))
/*
** macro to convert a Lua object into a GCObject
** (The access to 'tt' tries to ensure that 'v' is actually a Lua object.)
*/
#define obj2gco(v) check_exp((v)->tt >= LUA_TSTRING, &(cast_u(v)->gc))
/* actual number of total bytes allocated */
#define gettotalbytes(g) cast(lu_mem, (g)->totalbytes + (g)->GCdebt)
LUAI_FUNC void luaE_setdebt (global_State *g, l_mem debt);
LUAI_FUNC void luaE_freethread (lua_State *L, lua_State *L1);
LUAI_FUNC CallInfo *luaE_extendCI (lua_State *L);
LUAI_FUNC void luaE_shrinkCI (lua_State *L);
LUAI_FUNC void luaE_checkcstack (lua_State *L);
LUAI_FUNC void luaE_incCstack (lua_State *L);
LUAI_FUNC void luaE_warning (lua_State *L, const char *msg, int tocont);
LUAI_FUNC void luaE_warnerror (lua_State *L, const char *where);
LUAI_FUNC int luaE_resetthread (lua_State *L, int status);
#endif

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/*
** $Id: lstring.c $
** String table (keeps all strings handled by Lua)
** See Copyright Notice in lua.h
*/
#define lstring_c
#define LUA_CORE
#include "lprefix.h"
#include <string.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
/*
** Maximum size for string table.
*/
#define MAXSTRTB cast_int(luaM_limitN(MAX_INT, TString*))
/*
** equality for long strings
*/
int luaS_eqlngstr (TString *a, TString *b) {
size_t len = a->u.lnglen;
lua_assert(a->tt == LUA_VLNGSTR && b->tt == LUA_VLNGSTR);
return (a == b) || /* same instance or... */
((len == b->u.lnglen) && /* equal length and ... */
(memcmp(getlngstr(a), getlngstr(b), len) == 0)); /* equal contents */
}
unsigned int luaS_hash (const char *str, size_t l, unsigned int seed) {
unsigned int h = seed ^ cast_uint(l);
for (; l > 0; l--)
h ^= ((h<<5) + (h>>2) + cast_byte(str[l - 1]));
return h;
}
unsigned int luaS_hashlongstr (TString *ts) {
lua_assert(ts->tt == LUA_VLNGSTR);
if (ts->extra == 0) { /* no hash? */
size_t len = ts->u.lnglen;
ts->hash = luaS_hash(getlngstr(ts), len, ts->hash);
ts->extra = 1; /* now it has its hash */
}
return ts->hash;
}
static void tablerehash (TString **vect, int osize, int nsize) {
int i;
for (i = osize; i < nsize; i++) /* clear new elements */
vect[i] = NULL;
for (i = 0; i < osize; i++) { /* rehash old part of the array */
TString *p = vect[i];
vect[i] = NULL;
while (p) { /* for each string in the list */
TString *hnext = p->u.hnext; /* save next */
unsigned int h = lmod(p->hash, nsize); /* new position */
p->u.hnext = vect[h]; /* chain it into array */
vect[h] = p;
p = hnext;
}
}
}
/*
** Resize the string table. If allocation fails, keep the current size.
** (This can degrade performance, but any non-zero size should work
** correctly.)
*/
void luaS_resize (lua_State *L, int nsize) {
stringtable *tb = &G(L)->strt;
int osize = tb->size;
TString **newvect;
if (nsize < osize) /* shrinking table? */
tablerehash(tb->hash, osize, nsize); /* depopulate shrinking part */
newvect = luaM_reallocvector(L, tb->hash, osize, nsize, TString*);
if (l_unlikely(newvect == NULL)) { /* reallocation failed? */
if (nsize < osize) /* was it shrinking table? */
tablerehash(tb->hash, nsize, osize); /* restore to original size */
/* leave table as it was */
}
else { /* allocation succeeded */
tb->hash = newvect;
tb->size = nsize;
if (nsize > osize)
tablerehash(newvect, osize, nsize); /* rehash for new size */
}
}
/*
** Clear API string cache. (Entries cannot be empty, so fill them with
** a non-collectable string.)
*/
void luaS_clearcache (global_State *g) {
int i, j;
for (i = 0; i < STRCACHE_N; i++)
for (j = 0; j < STRCACHE_M; j++) {
if (iswhite(g->strcache[i][j])) /* will entry be collected? */
g->strcache[i][j] = g->memerrmsg; /* replace it with something fixed */
}
}
/*
** Initialize the string table and the string cache
*/
void luaS_init (lua_State *L) {
global_State *g = G(L);
int i, j;
stringtable *tb = &G(L)->strt;
tb->hash = luaM_newvector(L, MINSTRTABSIZE, TString*);
tablerehash(tb->hash, 0, MINSTRTABSIZE); /* clear array */
tb->size = MINSTRTABSIZE;
/* pre-create memory-error message */
g->memerrmsg = luaS_newliteral(L, MEMERRMSG);
luaC_fix(L, obj2gco(g->memerrmsg)); /* it should never be collected */
for (i = 0; i < STRCACHE_N; i++) /* fill cache with valid strings */
for (j = 0; j < STRCACHE_M; j++)
g->strcache[i][j] = g->memerrmsg;
}
/*
** creates a new string object
*/
static TString *createstrobj (lua_State *L, size_t l, int tag, unsigned int h) {
TString *ts;
GCObject *o;
size_t totalsize; /* total size of TString object */
totalsize = sizelstring(l);
o = luaC_newobj(L, tag, totalsize);
ts = gco2ts(o);
ts->hash = h;
ts->extra = 0;
getstr(ts)[l] = '\0'; /* ending 0 */
return ts;
}
TString *luaS_createlngstrobj (lua_State *L, size_t l) {
TString *ts = createstrobj(L, l, LUA_VLNGSTR, G(L)->seed);
ts->u.lnglen = l;
ts->shrlen = 0xFF; /* signals that it is a long string */
return ts;
}
void luaS_remove (lua_State *L, TString *ts) {
stringtable *tb = &G(L)->strt;
TString **p = &tb->hash[lmod(ts->hash, tb->size)];
while (*p != ts) /* find previous element */
p = &(*p)->u.hnext;
*p = (*p)->u.hnext; /* remove element from its list */
tb->nuse--;
}
static void growstrtab (lua_State *L, stringtable *tb) {
if (l_unlikely(tb->nuse == MAX_INT)) { /* too many strings? */
luaC_fullgc(L, 1); /* try to free some... */
if (tb->nuse == MAX_INT) /* still too many? */
luaM_error(L); /* cannot even create a message... */
}
if (tb->size <= MAXSTRTB / 2) /* can grow string table? */
luaS_resize(L, tb->size * 2);
}
/*
** Checks whether short string exists and reuses it or creates a new one.
*/
static TString *internshrstr (lua_State *L, const char *str, size_t l) {
TString *ts;
global_State *g = G(L);
stringtable *tb = &g->strt;
unsigned int h = luaS_hash(str, l, g->seed);
TString **list = &tb->hash[lmod(h, tb->size)];
lua_assert(str != NULL); /* otherwise 'memcmp'/'memcpy' are undefined */
for (ts = *list; ts != NULL; ts = ts->u.hnext) {
if (l == ts->shrlen && (memcmp(str, getshrstr(ts), l * sizeof(char)) == 0)) {
/* found! */
if (isdead(g, ts)) /* dead (but not collected yet)? */
changewhite(ts); /* resurrect it */
return ts;
}
}
/* else must create a new string */
if (tb->nuse >= tb->size) { /* need to grow string table? */
growstrtab(L, tb);
list = &tb->hash[lmod(h, tb->size)]; /* rehash with new size */
}
ts = createstrobj(L, l, LUA_VSHRSTR, h);
ts->shrlen = cast_byte(l);
memcpy(getshrstr(ts), str, l * sizeof(char));
ts->u.hnext = *list;
*list = ts;
tb->nuse++;
return ts;
}
/*
** new string (with explicit length)
*/
TString *luaS_newlstr (lua_State *L, const char *str, size_t l) {
if (l <= LUAI_MAXSHORTLEN) /* short string? */
return internshrstr(L, str, l);
else {
TString *ts;
if (l_unlikely(l * sizeof(char) >= (MAX_SIZE - sizeof(TString))))
luaM_toobig(L);
ts = luaS_createlngstrobj(L, l);
memcpy(getlngstr(ts), str, l * sizeof(char));
return ts;
}
}
/*
** Create or reuse a zero-terminated string, first checking in the
** cache (using the string address as a key). The cache can contain
** only zero-terminated strings, so it is safe to use 'strcmp' to
** check hits.
*/
TString *luaS_new (lua_State *L, const char *str) {
unsigned int i = point2uint(str) % STRCACHE_N; /* hash */
int j;
TString **p = G(L)->strcache[i];
for (j = 0; j < STRCACHE_M; j++) {
if (strcmp(str, getstr(p[j])) == 0) /* hit? */
return p[j]; /* that is it */
}
/* normal route */
for (j = STRCACHE_M - 1; j > 0; j--)
p[j] = p[j - 1]; /* move out last element */
/* new element is first in the list */
p[0] = luaS_newlstr(L, str, strlen(str));
return p[0];
}
Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue) {
Udata *u;
int i;
GCObject *o;
if (l_unlikely(s > MAX_SIZE - udatamemoffset(nuvalue)))
luaM_toobig(L);
o = luaC_newobj(L, LUA_VUSERDATA, sizeudata(nuvalue, s));
u = gco2u(o);
u->len = s;
u->nuvalue = nuvalue;
u->metatable = NULL;
for (i = 0; i < nuvalue; i++)
setnilvalue(&u->uv[i].uv);
return u;
}

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/*
** $Id: lstring.h $
** String table (keep all strings handled by Lua)
** See Copyright Notice in lua.h
*/
#ifndef lstring_h
#define lstring_h
#include "lgc.h"
#include "lobject.h"
#include "lstate.h"
/*
** Memory-allocation error message must be preallocated (it cannot
** be created after memory is exhausted)
*/
#define MEMERRMSG "not enough memory"
/*
** Size of a TString: Size of the header plus space for the string
** itself (including final '\0').
*/
#define sizelstring(l) (offsetof(TString, contents) + ((l) + 1) * sizeof(char))
#define luaS_newliteral(L, s) (luaS_newlstr(L, "" s, \
(sizeof(s)/sizeof(char))-1))
/*
** test whether a string is a reserved word
*/
#define isreserved(s) ((s)->tt == LUA_VSHRSTR && (s)->extra > 0)
/*
** equality for short strings, which are always internalized
*/
#define eqshrstr(a,b) check_exp((a)->tt == LUA_VSHRSTR, (a) == (b))
LUAI_FUNC unsigned int luaS_hash (const char *str, size_t l, unsigned int seed);
LUAI_FUNC unsigned int luaS_hashlongstr (TString *ts);
LUAI_FUNC int luaS_eqlngstr (TString *a, TString *b);
LUAI_FUNC void luaS_resize (lua_State *L, int newsize);
LUAI_FUNC void luaS_clearcache (global_State *g);
LUAI_FUNC void luaS_init (lua_State *L);
LUAI_FUNC void luaS_remove (lua_State *L, TString *ts);
LUAI_FUNC Udata *luaS_newudata (lua_State *L, size_t s, int nuvalue);
LUAI_FUNC TString *luaS_newlstr (lua_State *L, const char *str, size_t l);
LUAI_FUNC TString *luaS_new (lua_State *L, const char *str);
LUAI_FUNC TString *luaS_createlngstrobj (lua_State *L, size_t l);
#endif

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/*
** $Id: ltable.c $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
#define ltable_c
#define LUA_CORE
#include "lprefix.h"
/*
** Implementation of tables (aka arrays, objects, or hash tables).
** Tables keep its elements in two parts: an array part and a hash part.
** Non-negative integer keys are all candidates to be kept in the array
** part. The actual size of the array is the largest 'n' such that
** more than half the slots between 1 and n are in use.
** Hash uses a mix of chained scatter table with Brent's variation.
** A main invariant of these tables is that, if an element is not
** in its main position (i.e. the 'original' position that its hash gives
** to it), then the colliding element is in its own main position.
** Hence even when the load factor reaches 100%, performance remains good.
*/
#include <math.h>
#include <limits.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "lvm.h"
/*
** MAXABITS is the largest integer such that MAXASIZE fits in an
** unsigned int.
*/
#define MAXABITS cast_int(sizeof(int) * CHAR_BIT - 1)
/*
** MAXASIZE is the maximum size of the array part. It is the minimum
** between 2^MAXABITS and the maximum size that, measured in bytes,
** fits in a 'size_t'.
*/
#define MAXASIZE luaM_limitN(1u << MAXABITS, TValue)
/*
** MAXHBITS is the largest integer such that 2^MAXHBITS fits in a
** signed int.
*/
#define MAXHBITS (MAXABITS - 1)
/*
** MAXHSIZE is the maximum size of the hash part. It is the minimum
** between 2^MAXHBITS and the maximum size such that, measured in bytes,
** it fits in a 'size_t'.
*/
#define MAXHSIZE luaM_limitN(1u << MAXHBITS, Node)
/*
** When the original hash value is good, hashing by a power of 2
** avoids the cost of '%'.
*/
#define hashpow2(t,n) (gnode(t, lmod((n), sizenode(t))))
/*
** for other types, it is better to avoid modulo by power of 2, as
** they can have many 2 factors.
*/
#define hashmod(t,n) (gnode(t, ((n) % ((sizenode(t)-1)|1))))
#define hashstr(t,str) hashpow2(t, (str)->hash)
#define hashboolean(t,p) hashpow2(t, p)
#define hashpointer(t,p) hashmod(t, point2uint(p))
#define dummynode (&dummynode_)
static const Node dummynode_ = {
{{NULL}, LUA_VEMPTY, /* value's value and type */
LUA_VNIL, 0, {NULL}} /* key type, next, and key value */
};
static const TValue absentkey = {ABSTKEYCONSTANT};
/*
** Hash for integers. To allow a good hash, use the remainder operator
** ('%'). If integer fits as a non-negative int, compute an int
** remainder, which is faster. Otherwise, use an unsigned-integer
** remainder, which uses all bits and ensures a non-negative result.
*/
static Node *hashint (const Table *t, lua_Integer i) {
lua_Unsigned ui = l_castS2U(i);
if (ui <= cast_uint(INT_MAX))
return hashmod(t, cast_int(ui));
else
return hashmod(t, ui);
}
/*
** Hash for floating-point numbers.
** The main computation should be just
** n = frexp(n, &i); return (n * INT_MAX) + i
** but there are some numerical subtleties.
** In a two-complement representation, INT_MAX does not has an exact
** representation as a float, but INT_MIN does; because the absolute
** value of 'frexp' is smaller than 1 (unless 'n' is inf/NaN), the
** absolute value of the product 'frexp * -INT_MIN' is smaller or equal
** to INT_MAX. Next, the use of 'unsigned int' avoids overflows when
** adding 'i'; the use of '~u' (instead of '-u') avoids problems with
** INT_MIN.
*/
#if !defined(l_hashfloat)
static int l_hashfloat (lua_Number n) {
int i;
lua_Integer ni;
n = l_mathop(frexp)(n, &i) * -cast_num(INT_MIN);
if (!lua_numbertointeger(n, &ni)) { /* is 'n' inf/-inf/NaN? */
lua_assert(luai_numisnan(n) || l_mathop(fabs)(n) == cast_num(HUGE_VAL));
return 0;
}
else { /* normal case */
unsigned int u = cast_uint(i) + cast_uint(ni);
return cast_int(u <= cast_uint(INT_MAX) ? u : ~u);
}
}
#endif
/*
** returns the 'main' position of an element in a table (that is,
** the index of its hash value).
*/
static Node *mainpositionTV (const Table *t, const TValue *key) {
switch (ttypetag(key)) {
case LUA_VNUMINT: {
lua_Integer i = ivalue(key);
return hashint(t, i);
}
case LUA_VNUMFLT: {
lua_Number n = fltvalue(key);
return hashmod(t, l_hashfloat(n));
}
case LUA_VSHRSTR: {
TString *ts = tsvalue(key);
return hashstr(t, ts);
}
case LUA_VLNGSTR: {
TString *ts = tsvalue(key);
return hashpow2(t, luaS_hashlongstr(ts));
}
case LUA_VFALSE:
return hashboolean(t, 0);
case LUA_VTRUE:
return hashboolean(t, 1);
case LUA_VLIGHTUSERDATA: {
void *p = pvalue(key);
return hashpointer(t, p);
}
case LUA_VLCF: {
lua_CFunction f = fvalue(key);
return hashpointer(t, f);
}
default: {
GCObject *o = gcvalue(key);
return hashpointer(t, o);
}
}
}
l_sinline Node *mainpositionfromnode (const Table *t, Node *nd) {
TValue key;
getnodekey(cast(lua_State *, NULL), &key, nd);
return mainpositionTV(t, &key);
}
/*
** Check whether key 'k1' is equal to the key in node 'n2'. This
** equality is raw, so there are no metamethods. Floats with integer
** values have been normalized, so integers cannot be equal to
** floats. It is assumed that 'eqshrstr' is simply pointer equality, so
** that short strings are handled in the default case.
** A true 'deadok' means to accept dead keys as equal to their original
** values. All dead keys are compared in the default case, by pointer
** identity. (Only collectable objects can produce dead keys.) Note that
** dead long strings are also compared by identity.
** Once a key is dead, its corresponding value may be collected, and
** then another value can be created with the same address. If this
** other value is given to 'next', 'equalkey' will signal a false
** positive. In a regular traversal, this situation should never happen,
** as all keys given to 'next' came from the table itself, and therefore
** could not have been collected. Outside a regular traversal, we
** have garbage in, garbage out. What is relevant is that this false
** positive does not break anything. (In particular, 'next' will return
** some other valid item on the table or nil.)
*/
static int equalkey (const TValue *k1, const Node *n2, int deadok) {
if ((rawtt(k1) != keytt(n2)) && /* not the same variants? */
!(deadok && keyisdead(n2) && iscollectable(k1)))
return 0; /* cannot be same key */
switch (keytt(n2)) {
case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE:
return 1;
case LUA_VNUMINT:
return (ivalue(k1) == keyival(n2));
case LUA_VNUMFLT:
return luai_numeq(fltvalue(k1), fltvalueraw(keyval(n2)));
case LUA_VLIGHTUSERDATA:
return pvalue(k1) == pvalueraw(keyval(n2));
case LUA_VLCF:
return fvalue(k1) == fvalueraw(keyval(n2));
case ctb(LUA_VLNGSTR):
return luaS_eqlngstr(tsvalue(k1), keystrval(n2));
default:
return gcvalue(k1) == gcvalueraw(keyval(n2));
}
}
/*
** True if value of 'alimit' is equal to the real size of the array
** part of table 't'. (Otherwise, the array part must be larger than
** 'alimit'.)
*/
#define limitequalsasize(t) (isrealasize(t) || ispow2((t)->alimit))
/*
** Returns the real size of the 'array' array
*/
LUAI_FUNC unsigned int luaH_realasize (const Table *t) {
if (limitequalsasize(t))
return t->alimit; /* this is the size */
else {
unsigned int size = t->alimit;
/* compute the smallest power of 2 not smaller than 'size' */
size |= (size >> 1);
size |= (size >> 2);
size |= (size >> 4);
size |= (size >> 8);
#if (UINT_MAX >> 14) > 3 /* unsigned int has more than 16 bits */
size |= (size >> 16);
#if (UINT_MAX >> 30) > 3
size |= (size >> 32); /* unsigned int has more than 32 bits */
#endif
#endif
size++;
lua_assert(ispow2(size) && size/2 < t->alimit && t->alimit < size);
return size;
}
}
/*
** Check whether real size of the array is a power of 2.
** (If it is not, 'alimit' cannot be changed to any other value
** without changing the real size.)
*/
static int ispow2realasize (const Table *t) {
return (!isrealasize(t) || ispow2(t->alimit));
}
static unsigned int setlimittosize (Table *t) {
t->alimit = luaH_realasize(t);
setrealasize(t);
return t->alimit;
}
#define limitasasize(t) check_exp(isrealasize(t), t->alimit)
/*
** "Generic" get version. (Not that generic: not valid for integers,
** which may be in array part, nor for floats with integral values.)
** See explanation about 'deadok' in function 'equalkey'.
*/
static const TValue *getgeneric (Table *t, const TValue *key, int deadok) {
Node *n = mainpositionTV(t, key);
for (;;) { /* check whether 'key' is somewhere in the chain */
if (equalkey(key, n, deadok))
return gval(n); /* that's it */
else {
int nx = gnext(n);
if (nx == 0)
return &absentkey; /* not found */
n += nx;
}
}
}
/*
** returns the index for 'k' if 'k' is an appropriate key to live in
** the array part of a table, 0 otherwise.
*/
static unsigned int arrayindex (lua_Integer k) {
if (l_castS2U(k) - 1u < MAXASIZE) /* 'k' in [1, MAXASIZE]? */
return cast_uint(k); /* 'key' is an appropriate array index */
else
return 0;
}
/*
** returns the index of a 'key' for table traversals. First goes all
** elements in the array part, then elements in the hash part. The
** beginning of a traversal is signaled by 0.
*/
static unsigned int findindex (lua_State *L, Table *t, TValue *key,
unsigned int asize) {
unsigned int i;
if (ttisnil(key)) return 0; /* first iteration */
i = ttisinteger(key) ? arrayindex(ivalue(key)) : 0;
if (i - 1u < asize) /* is 'key' inside array part? */
return i; /* yes; that's the index */
else {
const TValue *n = getgeneric(t, key, 1);
if (l_unlikely(isabstkey(n)))
luaG_runerror(L, "invalid key to 'next'"); /* key not found */
i = cast_int(nodefromval(n) - gnode(t, 0)); /* key index in hash table */
/* hash elements are numbered after array ones */
return (i + 1) + asize;
}
}
int luaH_next (lua_State *L, Table *t, StkId key) {
unsigned int asize = luaH_realasize(t);
unsigned int i = findindex(L, t, s2v(key), asize); /* find original key */
for (; i < asize; i++) { /* try first array part */
if (!isempty(&t->array[i])) { /* a non-empty entry? */
setivalue(s2v(key), i + 1);
setobj2s(L, key + 1, &t->array[i]);
return 1;
}
}
for (i -= asize; cast_int(i) < sizenode(t); i++) { /* hash part */
if (!isempty(gval(gnode(t, i)))) { /* a non-empty entry? */
Node *n = gnode(t, i);
getnodekey(L, s2v(key), n);
setobj2s(L, key + 1, gval(n));
return 1;
}
}
return 0; /* no more elements */
}
static void freehash (lua_State *L, Table *t) {
if (!isdummy(t))
luaM_freearray(L, t->node, cast_sizet(sizenode(t)));
}
/*
** {=============================================================
** Rehash
** ==============================================================
*/
/*
** Compute the optimal size for the array part of table 't'. 'nums' is a
** "count array" where 'nums[i]' is the number of integers in the table
** between 2^(i - 1) + 1 and 2^i. 'pna' enters with the total number of
** integer keys in the table and leaves with the number of keys that
** will go to the array part; return the optimal size. (The condition
** 'twotoi > 0' in the for loop stops the loop if 'twotoi' overflows.)
*/
static unsigned int computesizes (unsigned int nums[], unsigned int *pna) {
int i;
unsigned int twotoi; /* 2^i (candidate for optimal size) */
unsigned int a = 0; /* number of elements smaller than 2^i */
unsigned int na = 0; /* number of elements to go to array part */
unsigned int optimal = 0; /* optimal size for array part */
/* loop while keys can fill more than half of total size */
for (i = 0, twotoi = 1;
twotoi > 0 && *pna > twotoi / 2;
i++, twotoi *= 2) {
a += nums[i];
if (a > twotoi/2) { /* more than half elements present? */
optimal = twotoi; /* optimal size (till now) */
na = a; /* all elements up to 'optimal' will go to array part */
}
}
lua_assert((optimal == 0 || optimal / 2 < na) && na <= optimal);
*pna = na;
return optimal;
}
static int countint (lua_Integer key, unsigned int *nums) {
unsigned int k = arrayindex(key);
if (k != 0) { /* is 'key' an appropriate array index? */
nums[luaO_ceillog2(k)]++; /* count as such */
return 1;
}
else
return 0;
}
/*
** Count keys in array part of table 't': Fill 'nums[i]' with
** number of keys that will go into corresponding slice and return
** total number of non-nil keys.
*/
static unsigned int numusearray (const Table *t, unsigned int *nums) {
int lg;
unsigned int ttlg; /* 2^lg */
unsigned int ause = 0; /* summation of 'nums' */
unsigned int i = 1; /* count to traverse all array keys */
unsigned int asize = limitasasize(t); /* real array size */
/* traverse each slice */
for (lg = 0, ttlg = 1; lg <= MAXABITS; lg++, ttlg *= 2) {
unsigned int lc = 0; /* counter */
unsigned int lim = ttlg;
if (lim > asize) {
lim = asize; /* adjust upper limit */
if (i > lim)
break; /* no more elements to count */
}
/* count elements in range (2^(lg - 1), 2^lg] */
for (; i <= lim; i++) {
if (!isempty(&t->array[i-1]))
lc++;
}
nums[lg] += lc;
ause += lc;
}
return ause;
}
static int numusehash (const Table *t, unsigned int *nums, unsigned int *pna) {
int totaluse = 0; /* total number of elements */
int ause = 0; /* elements added to 'nums' (can go to array part) */
int i = sizenode(t);
while (i--) {
Node *n = &t->node[i];
if (!isempty(gval(n))) {
if (keyisinteger(n))
ause += countint(keyival(n), nums);
totaluse++;
}
}
*pna += ause;
return totaluse;
}
/*
** Creates an array for the hash part of a table with the given
** size, or reuses the dummy node if size is zero.
** The computation for size overflow is in two steps: the first
** comparison ensures that the shift in the second one does not
** overflow.
*/
static void setnodevector (lua_State *L, Table *t, unsigned int size) {
if (size == 0) { /* no elements to hash part? */
t->node = cast(Node *, dummynode); /* use common 'dummynode' */
t->lsizenode = 0;
t->lastfree = NULL; /* signal that it is using dummy node */
}
else {
int i;
int lsize = luaO_ceillog2(size);
if (lsize > MAXHBITS || (1u << lsize) > MAXHSIZE)
luaG_runerror(L, "table overflow");
size = twoto(lsize);
t->node = luaM_newvector(L, size, Node);
for (i = 0; i < cast_int(size); i++) {
Node *n = gnode(t, i);
gnext(n) = 0;
setnilkey(n);
setempty(gval(n));
}
t->lsizenode = cast_byte(lsize);
t->lastfree = gnode(t, size); /* all positions are free */
}
}
/*
** (Re)insert all elements from the hash part of 'ot' into table 't'.
*/
static void reinsert (lua_State *L, Table *ot, Table *t) {
int j;
int size = sizenode(ot);
for (j = 0; j < size; j++) {
Node *old = gnode(ot, j);
if (!isempty(gval(old))) {
/* doesn't need barrier/invalidate cache, as entry was
already present in the table */
TValue k;
getnodekey(L, &k, old);
luaH_set(L, t, &k, gval(old));
}
}
}
/*
** Exchange the hash part of 't1' and 't2'.
*/
static void exchangehashpart (Table *t1, Table *t2) {
lu_byte lsizenode = t1->lsizenode;
Node *node = t1->node;
Node *lastfree = t1->lastfree;
t1->lsizenode = t2->lsizenode;
t1->node = t2->node;
t1->lastfree = t2->lastfree;
t2->lsizenode = lsizenode;
t2->node = node;
t2->lastfree = lastfree;
}
/*
** Resize table 't' for the new given sizes. Both allocations (for
** the hash part and for the array part) can fail, which creates some
** subtleties. If the first allocation, for the hash part, fails, an
** error is raised and that is it. Otherwise, it copies the elements from
** the shrinking part of the array (if it is shrinking) into the new
** hash. Then it reallocates the array part. If that fails, the table
** is in its original state; the function frees the new hash part and then
** raises the allocation error. Otherwise, it sets the new hash part
** into the table, initializes the new part of the array (if any) with
** nils and reinserts the elements of the old hash back into the new
** parts of the table.
*/
void luaH_resize (lua_State *L, Table *t, unsigned int newasize,
unsigned int nhsize) {
unsigned int i;
Table newt; /* to keep the new hash part */
unsigned int oldasize = setlimittosize(t);
TValue *newarray;
/* create new hash part with appropriate size into 'newt' */
setnodevector(L, &newt, nhsize);
if (newasize < oldasize) { /* will array shrink? */
t->alimit = newasize; /* pretend array has new size... */
exchangehashpart(t, &newt); /* and new hash */
/* re-insert into the new hash the elements from vanishing slice */
for (i = newasize; i < oldasize; i++) {
if (!isempty(&t->array[i]))
luaH_setint(L, t, i + 1, &t->array[i]);
}
t->alimit = oldasize; /* restore current size... */
exchangehashpart(t, &newt); /* and hash (in case of errors) */
}
/* allocate new array */
newarray = luaM_reallocvector(L, t->array, oldasize, newasize, TValue);
if (l_unlikely(newarray == NULL && newasize > 0)) { /* allocation failed? */
freehash(L, &newt); /* release new hash part */
luaM_error(L); /* raise error (with array unchanged) */
}
/* allocation ok; initialize new part of the array */
exchangehashpart(t, &newt); /* 't' has the new hash ('newt' has the old) */
t->array = newarray; /* set new array part */
t->alimit = newasize;
for (i = oldasize; i < newasize; i++) /* clear new slice of the array */
setempty(&t->array[i]);
/* re-insert elements from old hash part into new parts */
reinsert(L, &newt, t); /* 'newt' now has the old hash */
freehash(L, &newt); /* free old hash part */
}
void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize) {
int nsize = allocsizenode(t);
luaH_resize(L, t, nasize, nsize);
}
/*
** nums[i] = number of keys 'k' where 2^(i - 1) < k <= 2^i
*/
static void rehash (lua_State *L, Table *t, const TValue *ek) {
unsigned int asize; /* optimal size for array part */
unsigned int na; /* number of keys in the array part */
unsigned int nums[MAXABITS + 1];
int i;
int totaluse;
for (i = 0; i <= MAXABITS; i++) nums[i] = 0; /* reset counts */
setlimittosize(t);
na = numusearray(t, nums); /* count keys in array part */
totaluse = na; /* all those keys are integer keys */
totaluse += numusehash(t, nums, &na); /* count keys in hash part */
/* count extra key */
if (ttisinteger(ek))
na += countint(ivalue(ek), nums);
totaluse++;
/* compute new size for array part */
asize = computesizes(nums, &na);
/* resize the table to new computed sizes */
luaH_resize(L, t, asize, totaluse - na);
}
/*
** }=============================================================
*/
Table *luaH_new (lua_State *L) {
GCObject *o = luaC_newobj(L, LUA_VTABLE, sizeof(Table));
Table *t = gco2t(o);
t->metatable = NULL;
t->flags = cast_byte(maskflags); /* table has no metamethod fields */
t->array = NULL;
t->alimit = 0;
setnodevector(L, t, 0);
return t;
}
void luaH_free (lua_State *L, Table *t) {
freehash(L, t);
luaM_freearray(L, t->array, luaH_realasize(t));
luaM_free(L, t);
}
static Node *getfreepos (Table *t) {
if (!isdummy(t)) {
while (t->lastfree > t->node) {
t->lastfree--;
if (keyisnil(t->lastfree))
return t->lastfree;
}
}
return NULL; /* could not find a free place */
}
/*
** inserts a new key into a hash table; first, check whether key's main
** position is free. If not, check whether colliding node is in its main
** position or not: if it is not, move colliding node to an empty place and
** put new key in its main position; otherwise (colliding node is in its main
** position), new key goes to an empty position.
*/
static void luaH_newkey (lua_State *L, Table *t, const TValue *key,
TValue *value) {
Node *mp;
TValue aux;
if (l_unlikely(ttisnil(key)))
luaG_runerror(L, "table index is nil");
else if (ttisfloat(key)) {
lua_Number f = fltvalue(key);
lua_Integer k;
if (luaV_flttointeger(f, &k, F2Ieq)) { /* does key fit in an integer? */
setivalue(&aux, k);
key = &aux; /* insert it as an integer */
}
else if (l_unlikely(luai_numisnan(f)))
luaG_runerror(L, "table index is NaN");
}
if (ttisnil(value))
return; /* do not insert nil values */
mp = mainpositionTV(t, key);
if (!isempty(gval(mp)) || isdummy(t)) { /* main position is taken? */
Node *othern;
Node *f = getfreepos(t); /* get a free place */
if (f == NULL) { /* cannot find a free place? */
rehash(L, t, key); /* grow table */
/* whatever called 'newkey' takes care of TM cache */
luaH_set(L, t, key, value); /* insert key into grown table */
return;
}
lua_assert(!isdummy(t));
othern = mainpositionfromnode(t, mp);
if (othern != mp) { /* is colliding node out of its main position? */
/* yes; move colliding node into free position */
while (othern + gnext(othern) != mp) /* find previous */
othern += gnext(othern);
gnext(othern) = cast_int(f - othern); /* rechain to point to 'f' */
*f = *mp; /* copy colliding node into free pos. (mp->next also goes) */
if (gnext(mp) != 0) {
gnext(f) += cast_int(mp - f); /* correct 'next' */
gnext(mp) = 0; /* now 'mp' is free */
}
setempty(gval(mp));
}
else { /* colliding node is in its own main position */
/* new node will go into free position */
if (gnext(mp) != 0)
gnext(f) = cast_int((mp + gnext(mp)) - f); /* chain new position */
else lua_assert(gnext(f) == 0);
gnext(mp) = cast_int(f - mp);
mp = f;
}
}
setnodekey(L, mp, key);
luaC_barrierback(L, obj2gco(t), key);
lua_assert(isempty(gval(mp)));
setobj2t(L, gval(mp), value);
}
/*
** Search function for integers. If integer is inside 'alimit', get it
** directly from the array part. Otherwise, if 'alimit' is not
** the real size of the array, the key still can be in the array part.
** In this case, do the "Xmilia trick" to check whether 'key-1' is
** smaller than the real size.
** The trick works as follow: let 'p' be an integer such that
** '2^(p+1) >= alimit > 2^p', or '2^(p+1) > alimit-1 >= 2^p'.
** That is, 2^(p+1) is the real size of the array, and 'p' is the highest
** bit on in 'alimit-1'. What we have to check becomes 'key-1 < 2^(p+1)'.
** We compute '(key-1) & ~(alimit-1)', which we call 'res'; it will
** have the 'p' bit cleared. If the key is outside the array, that is,
** 'key-1 >= 2^(p+1)', then 'res' will have some bit on higher than 'p',
** therefore it will be larger or equal to 'alimit', and the check
** will fail. If 'key-1 < 2^(p+1)', then 'res' has no bit on higher than
** 'p', and as the bit 'p' itself was cleared, 'res' will be smaller
** than 2^p, therefore smaller than 'alimit', and the check succeeds.
** As special cases, when 'alimit' is 0 the condition is trivially false,
** and when 'alimit' is 1 the condition simplifies to 'key-1 < alimit'.
** If key is 0 or negative, 'res' will have its higher bit on, so that
** if cannot be smaller than alimit.
*/
const TValue *luaH_getint (Table *t, lua_Integer key) {
lua_Unsigned alimit = t->alimit;
if (l_castS2U(key) - 1u < alimit) /* 'key' in [1, t->alimit]? */
return &t->array[key - 1];
else if (!isrealasize(t) && /* key still may be in the array part? */
(((l_castS2U(key) - 1u) & ~(alimit - 1u)) < alimit)) {
t->alimit = cast_uint(key); /* probably '#t' is here now */
return &t->array[key - 1];
}
else { /* key is not in the array part; check the hash */
Node *n = hashint(t, key);
for (;;) { /* check whether 'key' is somewhere in the chain */
if (keyisinteger(n) && keyival(n) == key)
return gval(n); /* that's it */
else {
int nx = gnext(n);
if (nx == 0) break;
n += nx;
}
}
return &absentkey;
}
}
/*
** search function for short strings
*/
const TValue *luaH_getshortstr (Table *t, TString *key) {
Node *n = hashstr(t, key);
lua_assert(key->tt == LUA_VSHRSTR);
for (;;) { /* check whether 'key' is somewhere in the chain */
if (keyisshrstr(n) && eqshrstr(keystrval(n), key))
return gval(n); /* that's it */
else {
int nx = gnext(n);
if (nx == 0)
return &absentkey; /* not found */
n += nx;
}
}
}
const TValue *luaH_getstr (Table *t, TString *key) {
if (key->tt == LUA_VSHRSTR)
return luaH_getshortstr(t, key);
else { /* for long strings, use generic case */
TValue ko;
setsvalue(cast(lua_State *, NULL), &ko, key);
return getgeneric(t, &ko, 0);
}
}
/*
** main search function
*/
const TValue *luaH_get (Table *t, const TValue *key) {
switch (ttypetag(key)) {
case LUA_VSHRSTR: return luaH_getshortstr(t, tsvalue(key));
case LUA_VNUMINT: return luaH_getint(t, ivalue(key));
case LUA_VNIL: return &absentkey;
case LUA_VNUMFLT: {
lua_Integer k;
if (luaV_flttointeger(fltvalue(key), &k, F2Ieq)) /* integral index? */
return luaH_getint(t, k); /* use specialized version */
/* else... */
} /* FALLTHROUGH */
default:
return getgeneric(t, key, 0);
}
}
/*
** Finish a raw "set table" operation, where 'slot' is where the value
** should have been (the result of a previous "get table").
** Beware: when using this function you probably need to check a GC
** barrier and invalidate the TM cache.
*/
void luaH_finishset (lua_State *L, Table *t, const TValue *key,
const TValue *slot, TValue *value) {
if (isabstkey(slot))
luaH_newkey(L, t, key, value);
else
setobj2t(L, cast(TValue *, slot), value);
}
/*
** beware: when using this function you probably need to check a GC
** barrier and invalidate the TM cache.
*/
void luaH_set (lua_State *L, Table *t, const TValue *key, TValue *value) {
const TValue *slot = luaH_get(t, key);
luaH_finishset(L, t, key, slot, value);
}
void luaH_setint (lua_State *L, Table *t, lua_Integer key, TValue *value) {
const TValue *p = luaH_getint(t, key);
if (isabstkey(p)) {
TValue k;
setivalue(&k, key);
luaH_newkey(L, t, &k, value);
}
else
setobj2t(L, cast(TValue *, p), value);
}
/*
** Try to find a boundary in the hash part of table 't'. From the
** caller, we know that 'j' is zero or present and that 'j + 1' is
** present. We want to find a larger key that is absent from the
** table, so that we can do a binary search between the two keys to
** find a boundary. We keep doubling 'j' until we get an absent index.
** If the doubling would overflow, we try LUA_MAXINTEGER. If it is
** absent, we are ready for the binary search. ('j', being max integer,
** is larger or equal to 'i', but it cannot be equal because it is
** absent while 'i' is present; so 'j > i'.) Otherwise, 'j' is a
** boundary. ('j + 1' cannot be a present integer key because it is
** not a valid integer in Lua.)
*/
static lua_Unsigned hash_search (Table *t, lua_Unsigned j) {
lua_Unsigned i;
if (j == 0) j++; /* the caller ensures 'j + 1' is present */
do {
i = j; /* 'i' is a present index */
if (j <= l_castS2U(LUA_MAXINTEGER) / 2)
j *= 2;
else {
j = LUA_MAXINTEGER;
if (isempty(luaH_getint(t, j))) /* t[j] not present? */
break; /* 'j' now is an absent index */
else /* weird case */
return j; /* well, max integer is a boundary... */
}
} while (!isempty(luaH_getint(t, j))); /* repeat until an absent t[j] */
/* i < j && t[i] present && t[j] absent */
while (j - i > 1u) { /* do a binary search between them */
lua_Unsigned m = (i + j) / 2;
if (isempty(luaH_getint(t, m))) j = m;
else i = m;
}
return i;
}
static unsigned int binsearch (const TValue *array, unsigned int i,
unsigned int j) {
while (j - i > 1u) { /* binary search */
unsigned int m = (i + j) / 2;
if (isempty(&array[m - 1])) j = m;
else i = m;
}
return i;
}
/*
** Try to find a boundary in table 't'. (A 'boundary' is an integer index
** such that t[i] is present and t[i+1] is absent, or 0 if t[1] is absent
** and 'maxinteger' if t[maxinteger] is present.)
** (In the next explanation, we use Lua indices, that is, with base 1.
** The code itself uses base 0 when indexing the array part of the table.)
** The code starts with 'limit = t->alimit', a position in the array
** part that may be a boundary.
**
** (1) If 't[limit]' is empty, there must be a boundary before it.
** As a common case (e.g., after 't[#t]=nil'), check whether 'limit-1'
** is present. If so, it is a boundary. Otherwise, do a binary search
** between 0 and limit to find a boundary. In both cases, try to
** use this boundary as the new 'alimit', as a hint for the next call.
**
** (2) If 't[limit]' is not empty and the array has more elements
** after 'limit', try to find a boundary there. Again, try first
** the special case (which should be quite frequent) where 'limit+1'
** is empty, so that 'limit' is a boundary. Otherwise, check the
** last element of the array part. If it is empty, there must be a
** boundary between the old limit (present) and the last element
** (absent), which is found with a binary search. (This boundary always
** can be a new limit.)
**
** (3) The last case is when there are no elements in the array part
** (limit == 0) or its last element (the new limit) is present.
** In this case, must check the hash part. If there is no hash part
** or 'limit+1' is absent, 'limit' is a boundary. Otherwise, call
** 'hash_search' to find a boundary in the hash part of the table.
** (In those cases, the boundary is not inside the array part, and
** therefore cannot be used as a new limit.)
*/
lua_Unsigned luaH_getn (Table *t) {
unsigned int limit = t->alimit;
if (limit > 0 && isempty(&t->array[limit - 1])) { /* (1)? */
/* there must be a boundary before 'limit' */
if (limit >= 2 && !isempty(&t->array[limit - 2])) {
/* 'limit - 1' is a boundary; can it be a new limit? */
if (ispow2realasize(t) && !ispow2(limit - 1)) {
t->alimit = limit - 1;
setnorealasize(t); /* now 'alimit' is not the real size */
}
return limit - 1;
}
else { /* must search for a boundary in [0, limit] */
unsigned int boundary = binsearch(t->array, 0, limit);
/* can this boundary represent the real size of the array? */
if (ispow2realasize(t) && boundary > luaH_realasize(t) / 2) {
t->alimit = boundary; /* use it as the new limit */
setnorealasize(t);
}
return boundary;
}
}
/* 'limit' is zero or present in table */
if (!limitequalsasize(t)) { /* (2)? */
/* 'limit' > 0 and array has more elements after 'limit' */
if (isempty(&t->array[limit])) /* 'limit + 1' is empty? */
return limit; /* this is the boundary */
/* else, try last element in the array */
limit = luaH_realasize(t);
if (isempty(&t->array[limit - 1])) { /* empty? */
/* there must be a boundary in the array after old limit,
and it must be a valid new limit */
unsigned int boundary = binsearch(t->array, t->alimit, limit);
t->alimit = boundary;
return boundary;
}
/* else, new limit is present in the table; check the hash part */
}
/* (3) 'limit' is the last element and either is zero or present in table */
lua_assert(limit == luaH_realasize(t) &&
(limit == 0 || !isempty(&t->array[limit - 1])));
if (isdummy(t) || isempty(luaH_getint(t, cast(lua_Integer, limit + 1))))
return limit; /* 'limit + 1' is absent */
else /* 'limit + 1' is also present */
return hash_search(t, limit);
}
#if defined(LUA_DEBUG)
/* export these functions for the test library */
Node *luaH_mainposition (const Table *t, const TValue *key) {
return mainpositionTV(t, key);
}
#endif

63
lua-5.4.7/src/ltable.h Normal file
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@ -0,0 +1,63 @@
/*
** $Id: ltable.h $
** Lua tables (hash)
** See Copyright Notice in lua.h
*/
#ifndef ltable_h
#define ltable_h
#include "lobject.h"
#define gnode(t,i) (&(t)->node[i])
#define gval(n) (&(n)->i_val)
#define gnext(n) ((n)->u.next)
/*
** Clear all bits of fast-access metamethods, which means that the table
** may have any of these metamethods. (First access that fails after the
** clearing will set the bit again.)
*/
#define invalidateTMcache(t) ((t)->flags &= ~maskflags)
/* true when 't' is using 'dummynode' as its hash part */
#define isdummy(t) ((t)->lastfree == NULL)
/* allocated size for hash nodes */
#define allocsizenode(t) (isdummy(t) ? 0 : sizenode(t))
/* returns the Node, given the value of a table entry */
#define nodefromval(v) cast(Node *, (v))
LUAI_FUNC const TValue *luaH_getint (Table *t, lua_Integer key);
LUAI_FUNC void luaH_setint (lua_State *L, Table *t, lua_Integer key,
TValue *value);
LUAI_FUNC const TValue *luaH_getshortstr (Table *t, TString *key);
LUAI_FUNC const TValue *luaH_getstr (Table *t, TString *key);
LUAI_FUNC const TValue *luaH_get (Table *t, const TValue *key);
LUAI_FUNC void luaH_set (lua_State *L, Table *t, const TValue *key,
TValue *value);
LUAI_FUNC void luaH_finishset (lua_State *L, Table *t, const TValue *key,
const TValue *slot, TValue *value);
LUAI_FUNC Table *luaH_new (lua_State *L);
LUAI_FUNC void luaH_resize (lua_State *L, Table *t, unsigned int nasize,
unsigned int nhsize);
LUAI_FUNC void luaH_resizearray (lua_State *L, Table *t, unsigned int nasize);
LUAI_FUNC void luaH_free (lua_State *L, Table *t);
LUAI_FUNC int luaH_next (lua_State *L, Table *t, StkId key);
LUAI_FUNC lua_Unsigned luaH_getn (Table *t);
LUAI_FUNC unsigned int luaH_realasize (const Table *t);
#if defined(LUA_DEBUG)
LUAI_FUNC Node *luaH_mainposition (const Table *t, const TValue *key);
#endif
#endif

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