65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
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//===- YAML.cpp - YAMLIO utilities for object files -----------------------===//
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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 defines utility classes for handling the YAML representation of
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// object files.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ObjectYAML/YAML.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cctype>
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#include <cstdint>
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using namespace llvm;
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void yaml::ScalarTraits<yaml::BinaryRef>::output(
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const yaml::BinaryRef &Val, void *, raw_ostream &Out) {
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Val.writeAsHex(Out);
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}
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StringRef yaml::ScalarTraits<yaml::BinaryRef>::input(StringRef Scalar, void *,
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yaml::BinaryRef &Val) {
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if (Scalar.size() % 2 != 0)
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return "BinaryRef hex string must contain an even number of nybbles.";
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// TODO: Can we improve YAMLIO to permit a more accurate diagnostic here?
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// (e.g. a caret pointing to the offending character).
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for (unsigned I = 0, N = Scalar.size(); I != N; ++I)
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if (!llvm::isHexDigit(Scalar[I]))
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return "BinaryRef hex string must contain only hex digits.";
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Val = yaml::BinaryRef(Scalar);
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return {};
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}
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void yaml::BinaryRef::writeAsBinary(raw_ostream &OS, uint64_t N) const {
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if (!DataIsHexString) {
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OS.write((const char *)Data.data(), std::min<uint64_t>(N, Data.size()));
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return;
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}
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for (uint64_t I = 0, E = std::min<uint64_t>(N, Data.size() / 2); I != E;
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++I) {
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uint8_t Byte = llvm::hexDigitValue(Data[I * 2]);
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Byte <<= 4;
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Byte |= llvm::hexDigitValue(Data[I * 2 + 1]);
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OS.write(Byte);
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}
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}
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void yaml::BinaryRef::writeAsHex(raw_ostream &OS) const {
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if (binary_size() == 0)
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return;
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if (DataIsHexString) {
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OS.write((const char *)Data.data(), Data.size());
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return;
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}
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for (uint8_t Byte : Data)
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OS << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);
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}
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