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 #include <cstdint>
20
21 using namespace llvm;
22
output(const yaml::BinaryRef & Val,void *,raw_ostream & Out)23 void yaml::ScalarTraits<yaml::BinaryRef>::output(
24 const yaml::BinaryRef &Val, void *, raw_ostream &Out) {
25 Val.writeAsHex(Out);
26 }
27
input(StringRef Scalar,void *,yaml::BinaryRef & Val)28 StringRef yaml::ScalarTraits<yaml::BinaryRef>::input(StringRef Scalar, void *,
29 yaml::BinaryRef &Val) {
30 if (Scalar.size() % 2 != 0)
31 return "BinaryRef hex string must contain an even number of nybbles.";
32 // TODO: Can we improve YAMLIO to permit a more accurate diagnostic here?
33 // (e.g. a caret pointing to the offending character).
34 for (unsigned I = 0, N = Scalar.size(); I != N; ++I)
35 if (!isxdigit(Scalar[I]))
36 return "BinaryRef hex string must contain only hex digits.";
37 Val = yaml::BinaryRef(Scalar);
38 return {};
39 }
40
writeAsBinary(raw_ostream & OS) const41 void yaml::BinaryRef::writeAsBinary(raw_ostream &OS) const {
42 if (!DataIsHexString) {
43 OS.write((const char *)Data.data(), Data.size());
44 return;
45 }
46 for (unsigned I = 0, N = Data.size(); I != N; I += 2) {
47 uint8_t Byte;
48 StringRef((const char *)&Data[I], 2).getAsInteger(16, Byte);
49 OS.write(Byte);
50 }
51 }
52
writeAsHex(raw_ostream & OS) const53 void yaml::BinaryRef::writeAsHex(raw_ostream &OS) const {
54 if (binary_size() == 0)
55 return;
56 if (DataIsHexString) {
57 OS.write((const char *)Data.data(), Data.size());
58 return;
59 }
60 for (uint8_t Byte : Data)
61 OS << hexdigit(Byte >> 4) << hexdigit(Byte & 0xf);
62 }
63