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
output(const yaml::BinaryRef & Val,void *,raw_ostream & Out)22 void yaml::ScalarTraits<yaml::BinaryRef>::output(
23 const yaml::BinaryRef &Val, void *, raw_ostream &Out) {
24 Val.writeAsHex(Out);
25 }
26
input(StringRef Scalar,void *,yaml::BinaryRef & Val)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 for (unsigned I = 0, N = Scalar.size(); I != N; ++I)
34 if (!llvm::isHexDigit(Scalar[I]))
35 return "BinaryRef hex string must contain only hex digits.";
36 Val = yaml::BinaryRef(Scalar);
37 return {};
38 }
39
writeAsBinary(raw_ostream & OS,uint64_t N) const40 void yaml::BinaryRef::writeAsBinary(raw_ostream &OS, uint64_t N) const {
41 if (!DataIsHexString) {
42 OS.write((const char *)Data.data(), std::min<uint64_t>(N, Data.size()));
43 return;
44 }
45
46 for (uint64_t I = 0, E = std::min<uint64_t>(N, Data.size() / 2); I != E;
47 ++I) {
48 uint8_t Byte = llvm::hexDigitValue(Data[I * 2]);
49 Byte <<= 4;
50 Byte |= llvm::hexDigitValue(Data[I * 2 + 1]);
51 OS.write(Byte);
52 }
53 }
54
writeAsHex(raw_ostream & OS) const55 void yaml::BinaryRef::writeAsHex(raw_ostream &OS) const {
56 if (binary_size() == 0)
57 return;
58 if (DataIsHexString) {
59 OS.write((const char *)Data.data(), Data.size());
60 return;
61 }
62 for (uint8_t Byte : Data)
63 OS << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);
64 }
65