LLVM  6.0.0svn
YAML.cpp
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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"
18 #include <cctype>
19 #include <cstdint>
20 
21 using namespace llvm;
22 
24  const yaml::BinaryRef &Val, void *, raw_ostream &Out) {
25  Val.writeAsHex(Out);
26 }
27 
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 
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 
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 }
Compute iterated dominance frontiers using a linear time algorithm.
Definition: AllocatorList.h:24
LLVM_NODISCARD LLVM_ATTRIBUTE_ALWAYS_INLINE size_t size() const
size - Get the string size.
Definition: StringRef.h:138
char hexdigit(unsigned X, bool LowerCase=false)
hexdigit - Return the hexadecimal character for the given number X (which should be less than 16)...
Definition: StringExtras.h:37
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:149
void writeAsBinary(raw_ostream &OS) const
Write the contents (regardless of whether it is binary or a hex string) as binary to the given raw_os...
Definition: YAML.cpp:41
const T * data() const
Definition: ArrayRef.h:146
raw_ostream & write(unsigned char C)
ArrayRef< uint8_t >::size_type binary_size() const
The number of bytes that are represented by this BinaryRef.
Definition: YAML.h:82
std::enable_if< std::numeric_limits< T >::is_signed, bool >::type getAsInteger(unsigned Radix, T &Result) const
Parse the current string as an integer of the specified radix.
Definition: StringRef.h:497
This class should be specialized by type that requires custom conversion to/from a yaml scalar...
Definition: YAMLTraits.h:137
Specialized YAMLIO scalar type for representing a binary blob.
Definition: YAML.h:64
#define I(x, y, z)
Definition: MD5.cpp:58
#define N
This class implements an extremely fast bulk output stream that can only output to a stream...
Definition: raw_ostream.h:44
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:49
void writeAsHex(raw_ostream &OS) const
Write the contents (regardless of whether it is binary or a hex string) as hex to the given raw_ostre...
Definition: YAML.cpp:53