1 //===- MsgPackWriter.h - Simple MsgPack writer ------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// This file contains a MessagePack writer.
13 /// See https://github.com/msgpack/msgpack/blob/master/spec.md for the full
18 /// raw_ostream output = GetOutputStream();
19 /// msgpack::Writer MPWriter(output);
20 /// MPWriter.writeNil();
21 /// MPWriter.write(false);
22 /// MPWriter.write("string");
27 //===----------------------------------------------------------------------===//
29 #ifndef LLVM_SUPPORT_MSGPACKPARSER_H
30 #define LLVM_SUPPORT_MSGPACKPARSER_H
32 #include "llvm/BinaryFormat/MsgPack.h"
33 #include "llvm/Support/EndianStream.h"
34 #include "llvm/Support/MemoryBuffer.h"
35 #include "llvm/Support/raw_ostream.h"
40 /// Writes MessagePack objects to an output stream, one at a time.
43 /// Construct a writer, optionally enabling "Compatibility Mode" as defined
44 /// in the MessagePack specification.
46 /// When in \p Compatible mode, the writer will write \c Str16 formats
47 /// instead of \c Str8 formats, and will refuse to write any \c Bin formats.
49 /// \param OS stream to output MessagePack objects to.
50 /// \param Compatible when set, write in "Compatibility Mode".
51 Writer(raw_ostream &OS, bool Compatible = false);
53 Writer(const Writer &) = delete;
54 Writer &operator=(const Writer &) = delete;
56 /// Write a \em Nil to the output stream.
58 /// The output will be the \em nil format.
61 /// Write a \em Boolean to the output stream.
63 /// The output will be a \em bool format.
66 /// Write a signed integer to the output stream.
68 /// The output will be in the smallest possible \em int format.
70 /// The format chosen may be for an unsigned integer.
71 void write(int64_t i);
73 /// Write an unsigned integer to the output stream.
75 /// The output will be in the smallest possible \em int format.
76 void write(uint64_t u);
78 /// Write a floating point number to the output stream.
80 /// The output will be in the smallest possible \em float format.
83 /// Write a string to the output stream.
85 /// The output will be in the smallest possible \em str format.
86 void write(StringRef s);
88 /// Write a memory buffer to the output stream.
90 /// The output will be in the smallest possible \em bin format.
92 /// \warning Do not use this overload if in \c Compatible mode.
93 void write(MemoryBufferRef Buffer);
95 /// Write the header for an \em Array of the given size.
97 /// The output will be in the smallest possible \em array format.
99 /// The header contains an identifier for the \em array format used, as well
100 /// as an encoding of the size of the array.
102 /// N.B. The caller must subsequently call \c Write an additional \p Size
103 /// times to complete the array.
104 void writeArraySize(uint32_t Size);
106 /// Write the header for a \em Map of the given size.
108 /// The output will be in the smallest possible \em map format.
110 /// The header contains an identifier for the \em map format used, as well
111 /// as an encoding of the size of the map.
113 /// N.B. The caller must subsequently call \c Write and additional \c Size*2
114 /// times to complete the map. Each even numbered call to \c Write defines a
115 /// new key, and each odd numbered call defines the previous key's value.
116 void writeMapSize(uint32_t Size);
118 /// Write a typed memory buffer (an extension type) to the output stream.
120 /// The output will be in the smallest possible \em ext format.
121 void writeExt(int8_t Type, MemoryBufferRef Buffer);
124 support::endian::Writer EW;
128 } // end namespace msgpack
129 } // end namespace llvm
131 #endif // LLVM_SUPPORT_MSGPACKPARSER_H