c371ff048d
Decide whether or not to use thread-safe statics depending on whether or not we have an explicit request from the driver. If we don't have an explicit request, infer which behavior to use depending on the compatibility version we are targeting. N.B. CodeGen support is still ongoing. llvm-svn: 232906
101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
//===- VersionTuple.cpp - Version Number Handling ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the VersionTuple class, which represents a version in
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// the form major[.minor[.subminor]].
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/VersionTuple.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang;
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std::string VersionTuple::getAsString() const {
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std::string Result;
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{
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llvm::raw_string_ostream Out(Result);
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Out << *this;
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}
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return Result;
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}
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raw_ostream& clang::operator<<(raw_ostream &Out,
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const VersionTuple &V) {
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Out << V.getMajor();
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if (Optional<unsigned> Minor = V.getMinor())
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Out << (V.usesUnderscores() ? '_' : '.') << *Minor;
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if (Optional<unsigned> Subminor = V.getSubminor())
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Out << (V.usesUnderscores() ? '_' : '.') << *Subminor;
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if (Optional<unsigned> Build = V.getBuild())
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Out << (V.usesUnderscores() ? '_' : '.') << *Build;
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return Out;
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}
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static bool parseInt(StringRef &input, unsigned &value) {
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assert(value == 0);
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if (input.empty()) return true;
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char next = input[0];
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input = input.substr(1);
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if (next < '0' || next > '9') return true;
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value = (unsigned) (next - '0');
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while (!input.empty()) {
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next = input[0];
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if (next < '0' || next > '9') return false;
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input = input.substr(1);
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value = value * 10 + (unsigned) (next - '0');
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}
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return false;
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}
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bool VersionTuple::tryParse(StringRef input) {
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unsigned major = 0, minor = 0, micro = 0, build = 0;
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// Parse the major version, [0-9]+
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if (parseInt(input, major)) return true;
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if (input.empty()) {
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*this = VersionTuple(major);
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return false;
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}
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// If we're not done, parse the minor version, \.[0-9]+
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if (input[0] != '.') return true;
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input = input.substr(1);
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if (parseInt(input, minor)) return true;
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if (input.empty()) {
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*this = VersionTuple(major, minor);
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return false;
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}
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// If we're not done, parse the micro version, \.[0-9]+
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if (input[0] != '.') return true;
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input = input.substr(1);
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if (parseInt(input, micro)) return true;
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if (input.empty()) {
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*this = VersionTuple(major, minor, micro);
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return false;
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}
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// If we're not done, parse the micro version, \.[0-9]+
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if (input[0] != '.') return true;
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input = input.substr(1);
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if (parseInt(input, build)) return true;
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// If we have characters left over, it's an error.
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if (!input.empty()) return true;
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*this = VersionTuple(major, minor, micro, build);
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return false;
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}
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