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/Object/YAML.h"
16#include "llvm/ADT/StringExtras.h"
17#include "llvm/Support/raw_ostream.h"
18
19using namespace llvm;
20using namespace object::yaml;
21
22void yaml::ScalarTraits<object::yaml::BinaryRef>::output(
23    const object::yaml::BinaryRef &Val, void *, llvm::raw_ostream &Out) {
24  Val.writeAsHex(Out);
25}
26
27StringRef yaml::ScalarTraits<object::yaml::BinaryRef>::input(
28    StringRef Scalar, void *, object::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 = object::yaml::BinaryRef(Scalar);
37  return StringRef();
38}
39
40void 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 BinaryRef::writeAsHex(raw_ostream &OS) const {
53  if (binary_size() == 0) {
54    OS << "\"\"";
55    return;
56  }
57  if (DataIsHexString) {
58    OS.write((const char *)Data.data(), Data.size());
59    return;
60  }
61  for (ArrayRef<uint8_t>::iterator I = Data.begin(), E = Data.end(); I != E;
62       ++I) {
63    uint8_t Byte = *I;
64    OS << hexdigit(Byte >> 4);
65    OS << hexdigit(Byte & 0xf);
66  }
67}
68