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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file defines utility classes for handling the YAML representation of 10 // 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 20 using namespace llvm; 21 22 void yaml::ScalarTraits<yaml::BinaryRef>::output( 23 const yaml::BinaryRef &Val, void *, raw_ostream &Out) { 24 Val.writeAsHex(Out); 25 } 26 27 StringRef 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 39 void 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 54 void 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