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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
//===- VersionTuple.cpp - Version Number Handling ---------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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 "llvm/Support/VersionTuple.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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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 &llvm::operator<<(raw_ostream &Out, 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 << '.' << *Minor;
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if (Optional<unsigned> Subminor = V.getSubminor())
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Out << '.' << *Subminor;
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if (Optional<unsigned> Build = V.getBuild())
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Out << '.' << *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())
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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')
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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')
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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))
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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] != '.')
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return true;
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input = input.substr(1);
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if (parseInt(input, minor))
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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] != '.')
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return true;
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input = input.substr(1);
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if (parseInt(input, micro))
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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] != '.')
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return true;
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input = input.substr(1);
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if (parseInt(input, build))
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return true;
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// If we have characters left over, it's an error.
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if (!input.empty())
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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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