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//===- llvm/TextAPI/PackedVersion.cpp - PackedVersion -----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief Implements the Mach-O packed version.
///
//===----------------------------------------------------------------------===//
#include "llvm/TextAPI/MachO/PackedVersion.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
namespace MachO {
bool PackedVersion::parse32(StringRef Str) {
Version = 0;
if (Str.empty())
return false;
SmallVector<StringRef, 3> Parts;
SplitString(Str, Parts, ".");
if (Parts.size() > 3)
return false;
unsigned long long Num;
if (getAsUnsignedInteger(Parts[0], 10, Num))
return false;
if (Num > UINT16_MAX)
return false;
Version = Num << 16;
for (unsigned i = 1, ShiftNum = 8; i < Parts.size(); ++i, ShiftNum -= 8) {
if (getAsUnsignedInteger(Parts[i], 10, Num))
return false;
if (Num > UINT8_MAX)
return false;
Version |= (Num << ShiftNum);
}
return true;
}
std::pair<bool, bool> PackedVersion::parse64(StringRef Str) {
bool Truncated = false;
Version = 0;
if (Str.empty())
return std::make_pair(false, Truncated);
SmallVector<StringRef, 5> Parts;
SplitString(Str, Parts, ".");
if (Parts.size() > 5)
return std::make_pair(false, Truncated);
unsigned long long Num;
if (getAsUnsignedInteger(Parts[0], 10, Num))
return std::make_pair(false, Truncated);
if (Num > 0xFFFFFFULL)
return std::make_pair(false, Truncated);
if (Num > 0xFFFFULL) {
Num = 0xFFFFULL;
Truncated = true;
}
Version = Num << 16;
for (unsigned i = 1, ShiftNum = 8; i < Parts.size() && i < 3;
++i, ShiftNum -= 8) {
if (getAsUnsignedInteger(Parts[i], 10, Num))
return std::make_pair(false, Truncated);
if (Num > 0x3FFULL)
return std::make_pair(false, Truncated);
if (Num > 0xFFULL) {
Num = 0xFFULL;
Truncated = true;
}
Version |= (Num << ShiftNum);
}
if (Parts.size() > 3)
Truncated = true;
return std::make_pair(true, Truncated);
}
void PackedVersion::print(raw_ostream &OS) const {
OS << format("%d", getMajor());
if (getMinor() || getSubminor())
OS << format(".%d", getMinor());
if (getSubminor())
OS << format(".%d", getSubminor());
}
} // end namespace MachO.
} // end namespace llvm.
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