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uuid: Remove ulid helper funcs

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This commit is contained in:
rhy 2023-01-09 16:07:50 -03:00
parent c0aba5027c
commit b656042ba7
1 changed files with 17 additions and 28 deletions
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45
uuid.lua
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@ -45,37 +45,26 @@ local function _now(time_func, ...)
error("assertion failed: socket can't be found and no time function provided")
end
--generate the time part of an ulid
local function _encode_time(time)
time = math.floor((time or _now()) * 1000)
local out = {}
for i = 10, 1, -1 do
local mod = time % #_encoding
out[i] = _encoding[mod + 1]
time = (time - mod) / #_encoding
end
return table.concat(out)
end
--generate the random part of an ulid
local function _encode_random(rng)
local out = {}
for i = 1, 16 do
out[i] = _encoding[math.floor(_random(rng) * #_encoding) + 1]
end
return table.concat(out)
end
--generate an ULID using this rng at this time
--generate an ULID using this rng at this time (now by default)
--see https://github.com/ulid/spec
--implementation based on https://github.com/Tieske/ulid.lua
function uuid.ulid(rng, time)
return _encode_time(time) .. _encode_random(rng)
time = math.floor((time or _now()) * 1000)
local time_part = {}
local random_part = {}
for i = 10, 1, -1 do
local mod = time % #_encoding
time_part[i] = _encoding[mod + 1]
time = (time - mod) / #_encoding
end
for i = 1, 16 do
random_part[i] = _encoding[math.floor(_random(rng) * #_encoding) + 1]
end
return table.concat(time_part) .. table.concat(random_part)
end
return uuid