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