64 lines · cpp
1//===- YAML.cpp - YAMLIO utilities for object files -----------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file defines utility classes for handling the YAML representation of10// object files.11//12//===----------------------------------------------------------------------===//13 14#include "llvm/ObjectYAML/YAML.h"15#include "llvm/ADT/StringExtras.h"16#include "llvm/Support/raw_ostream.h"17#include <cctype>18#include <cstdint>19 20using namespace llvm;21 22void yaml::ScalarTraits<yaml::BinaryRef>::output(23 const yaml::BinaryRef &Val, void *, raw_ostream &Out) {24 Val.writeAsHex(Out);25}26 27StringRef yaml::ScalarTraits<yaml::BinaryRef>::input(StringRef Scalar, void *,28 yaml::BinaryRef &Val) {29 if (Scalar.size() % 2 != 0)30 return "BinaryRef hex string must contain an even number of nybbles.";31 // TODO: Can we improve YAMLIO to permit a more accurate diagnostic here?32 // (e.g. a caret pointing to the offending character).33 if (!llvm::all_of(Scalar, llvm::isHexDigit))34 return "BinaryRef hex string must contain only hex digits.";35 Val = yaml::BinaryRef(Scalar);36 return {};37}38 39void yaml::BinaryRef::writeAsBinary(raw_ostream &OS, uint64_t N) const {40 if (!DataIsHexString) {41 OS.write((const char *)Data.data(), std::min<uint64_t>(N, Data.size()));42 return;43 }44 45 for (uint64_t I = 0, E = std::min<uint64_t>(N, Data.size() / 2); I != E;46 ++I) {47 uint8_t Byte = llvm::hexDigitValue(Data[I * 2]);48 Byte <<= 4;49 Byte |= llvm::hexDigitValue(Data[I * 2 + 1]);50 OS.write(Byte);51 }52}53 54void yaml::BinaryRef::writeAsHex(raw_ostream &OS) const {55 if (binary_size() == 0)56 return;57 if (DataIsHexString) {58 OS.write((const char *)Data.data(), Data.size());59 return;60 }61 for (uint8_t Byte : Data)62 OS << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);63}64