89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
//===- VersionTuple.cpp - Version Number Handling ---------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the VersionTuple class, which represents a version in
|
|
// the form major[.minor[.subminor]].
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#include "clang/Basic/VersionTuple.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace clang;
|
|
|
|
std::string VersionTuple::getAsString() const {
|
|
std::string Result;
|
|
{
|
|
llvm::raw_string_ostream Out(Result);
|
|
Out << *this;
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
raw_ostream& clang::operator<<(raw_ostream &Out,
|
|
const VersionTuple &V) {
|
|
Out << V.getMajor();
|
|
if (Optional<unsigned> Minor = V.getMinor())
|
|
Out << '.' << *Minor;
|
|
if (Optional<unsigned> Subminor = V.getSubminor())
|
|
Out << '.' << *Subminor;
|
|
return Out;
|
|
}
|
|
|
|
static bool parseInt(StringRef &input, unsigned &value) {
|
|
assert(value == 0);
|
|
if (input.empty()) return true;
|
|
|
|
char next = input[0];
|
|
input = input.substr(1);
|
|
if (next < '0' || next > '9') return true;
|
|
value = (unsigned) (next - '0');
|
|
|
|
while (!input.empty()) {
|
|
next = input[0];
|
|
if (next < '0' || next > '9') return false;
|
|
input = input.substr(1);
|
|
value = value * 10 + (unsigned) (next - '0');
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool VersionTuple::tryParse(StringRef input) {
|
|
unsigned major = 0, minor = 0, micro = 0;
|
|
|
|
// Parse the major version, [0-9]+
|
|
if (parseInt(input, major)) return true;
|
|
|
|
if (input.empty()) {
|
|
*this = VersionTuple(major);
|
|
return false;
|
|
}
|
|
|
|
// If we're not done, parse the minor version, \.[0-9]+
|
|
if (input[0] != '.') return true;
|
|
input = input.substr(1);
|
|
if (parseInt(input, minor)) return true;
|
|
|
|
if (input.empty()) {
|
|
*this = VersionTuple(major, minor);
|
|
return false;
|
|
}
|
|
|
|
// If we're not done, parse the micro version, \.[0-9]+
|
|
if (input[0] != '.') return true;
|
|
input = input.substr(1);
|
|
if (parseInt(input, micro)) return true;
|
|
|
|
// If we have characters left over, it's an error.
|
|
if (!input.empty()) return true;
|
|
|
|
*this = VersionTuple(major, minor, micro);
|
|
return false;
|
|
}
|