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/MC/YAML.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/Support/raw_ostream.h"
18 #include <cctype>
19
20 using namespace llvm;
21
output(const yaml::BinaryRef & Val,void *,llvm::raw_ostream & Out)22 void yaml::ScalarTraits<yaml::BinaryRef>::output(
23 const yaml::BinaryRef &Val, void *, llvm::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 (!isxdigit(Scalar[I]))
35 return "BinaryRef hex string must contain only hex digits.";
36 Val = yaml::BinaryRef(Scalar);
37 return StringRef();
38 }
39
writeAsBinary(raw_ostream & OS) const40 void 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
writeAsHex(raw_ostream & OS) const52 void 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 (ArrayRef<uint8_t>::iterator I = Data.begin(), E = Data.end(); I != E;
60 ++I) {
61 uint8_t Byte = *I;
62 OS << hexdigit(Byte >> 4);
63 OS << hexdigit(Byte & 0xf);
64 }
65 }
66