1//===- YAML.cpp - YAMLIO utilities for object files -----------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines utility classes for handling the YAML representation of
11// object files.
12//
13//===----------------------------------------------------------------------===//
14
15#include "llvm/ObjectYAML/YAML.h"
16#include "llvm/ADT/StringExtras.h"
17#include "llvm/Support/raw_ostream.h"
18#include <cctype>
19
20using namespace llvm;
21
22void yaml::ScalarTraits<yaml::BinaryRef>::output(
23    const yaml::BinaryRef &Val, void *, llvm::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  for (unsigned I = 0, N = Scalar.size(); I != N; ++I)
34    if (!isxdigit(Scalar[I]))
35      return "BinaryRef hex string must contain only hex digits.";
36  Val = yaml::BinaryRef(Scalar);
37  return StringRef();
38}
39
40void yaml::BinaryRef::writeAsBinary(raw_ostream &OS) const {
41  if (!DataIsHexString) {
42    OS.write((const char *)Data.data(), Data.size());
43    return;
44  }
45  for (unsigned I = 0, N = Data.size(); I != N; I += 2) {
46    uint8_t Byte;
47    StringRef((const char *)&Data[I],  2).getAsInteger(16, Byte);
48    OS.write(Byte);
49  }
50}
51
52void yaml::BinaryRef::writeAsHex(raw_ostream &OS) const {
53  if (binary_size() == 0)
54    return;
55  if (DataIsHexString) {
56    OS.write((const char *)Data.data(), Data.size());
57    return;
58  }
59  for (uint8_t Byte : Data)
60    OS << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);
61}
62