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Diffstat (limited to 'llvm/lib/TextAPI/MachO/PackedVersion.cpp')
-rw-r--r-- | llvm/lib/TextAPI/MachO/PackedVersion.cpp | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/llvm/lib/TextAPI/MachO/PackedVersion.cpp b/llvm/lib/TextAPI/MachO/PackedVersion.cpp new file mode 100644 index 00000000000..8405aba90ed --- /dev/null +++ b/llvm/lib/TextAPI/MachO/PackedVersion.cpp @@ -0,0 +1,113 @@ +//===- PackedVersion.cpp --------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// 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. |