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
20using namespace llvm;
21
22void yaml::ScalarTraits<yaml::BinaryRef>::output(
23 const yaml::BinaryRef &Val, void *, raw_ostream &Out) {
24 Val.writeAsHex(OS&: 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(Range&: Scalar, P: 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(Ptr: (const char *)Data.data(), Size: std::min<uint64_t>(a: N, b: Data.size()));
42 return;
43 }
44
45 for (uint64_t I = 0, E = std::min<uint64_t>(a: N, b: Data.size() / 2); I != E;
46 ++I) {
47 uint8_t Byte = llvm::hexDigitValue(C: Data[I * 2]);
48 Byte <<= 4;
49 Byte |= llvm::hexDigitValue(C: Data[I * 2 + 1]);
50 OS.write(C: 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(Ptr: (const char *)Data.data(), Size: Data.size());
59 return;
60 }
61 for (uint8_t Byte : Data)
62 OS << hexdigit(X: Byte >> 4) << hexdigit(X: Byte & 0xf);
63}
64

source code of llvm/lib/ObjectYAML/YAML.cpp