1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | //===- MsgPackWriter.cpp - Simple MsgPack writer ----------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// /// /// \file /// This file implements a MessagePack writer. /// //===----------------------------------------------------------------------===// #include "llvm/BinaryFormat/MsgPackWriter.h" #include "llvm/BinaryFormat/MsgPack.h" using namespace llvm; using namespace msgpack; Writer::Writer(raw_ostream &OS, bool Compatible) : EW(OS, Endianness), Compatible(Compatible) {} void Writer::writeNil() { EW.write(FirstByte::Nil); } void Writer::write(bool b) { EW.write(b ? FirstByte::True : FirstByte::False); } void Writer::write(int64_t i) { if (i >= 0) { write(static_cast<uint64_t>(i)); return; } if (i >= FixMin::NegativeInt) { EW.write(static_cast<int8_t>(i)); return; } if (i >= INT8_MIN) { EW.write(FirstByte::Int8); EW.write(static_cast<int8_t>(i)); return; } if (i >= INT16_MIN) { EW.write(FirstByte::Int16); EW.write(static_cast<int16_t>(i)); return; } if (i >= INT32_MIN) { EW.write(FirstByte::Int32); EW.write(static_cast<int32_t>(i)); return; } EW.write(FirstByte::Int64); EW.write(i); } void Writer::write(uint64_t u) { if (u <= FixMax::PositiveInt) { EW.write(static_cast<uint8_t>(u)); return; } if (u <= UINT8_MAX) { EW.write(FirstByte::UInt8); EW.write(static_cast<uint8_t>(u)); return; } if (u <= UINT16_MAX) { EW.write(FirstByte::UInt16); EW.write(static_cast<uint16_t>(u)); return; } if (u <= UINT32_MAX) { EW.write(FirstByte::UInt32); EW.write(static_cast<uint32_t>(u)); return; } EW.write(FirstByte::UInt64); EW.write(u); } void Writer::write(double d) { // If no loss of precision, encode as a Float32. double a = std::fabs(d); if (a >= std::numeric_limits<float>::min() && a <= std::numeric_limits<float>::max()) { EW.write(FirstByte::Float32); EW.write(static_cast<float>(d)); } else { EW.write(FirstByte::Float64); EW.write(d); } } void Writer::write(StringRef s) { size_t Size = s.size(); if (Size <= FixMax::String) EW.write(static_cast<uint8_t>(FixBits::String | Size)); else if (!Compatible && Size <= UINT8_MAX) { EW.write(FirstByte::Str8); EW.write(static_cast<uint8_t>(Size)); } else if (Size <= UINT16_MAX) { EW.write(FirstByte::Str16); EW.write(static_cast<uint16_t>(Size)); } else { assert(Size <= UINT32_MAX && "String object too long to be encoded"); EW.write(FirstByte::Str32); EW.write(static_cast<uint32_t>(Size)); } EW.OS << s; } void Writer::write(MemoryBufferRef Buffer) { assert(!Compatible && "Attempt to write Bin format in compatible mode"); size_t Size = Buffer.getBufferSize(); if (Size <= UINT8_MAX) { EW.write(FirstByte::Bin8); EW.write(static_cast<uint8_t>(Size)); } else if (Size <= UINT16_MAX) { EW.write(FirstByte::Bin16); EW.write(static_cast<uint16_t>(Size)); } else { assert(Size <= UINT32_MAX && "Binary object too long to be encoded"); EW.write(FirstByte::Bin32); EW.write(static_cast<uint32_t>(Size)); } EW.OS.write(Buffer.getBufferStart(), Size); } void Writer::writeArraySize(uint32_t Size) { if (Size <= FixMax::Array) { EW.write(static_cast<uint8_t>(FixBits::Array | Size)); return; } if (Size <= UINT16_MAX) { EW.write(FirstByte::Array16); EW.write(static_cast<uint16_t>(Size)); return; } EW.write(FirstByte::Array32); EW.write(Size); } void Writer::writeMapSize(uint32_t Size) { if (Size <= FixMax::Map) { EW.write(static_cast<uint8_t>(FixBits::Map | Size)); return; } if (Size <= UINT16_MAX) { EW.write(FirstByte::Map16); EW.write(static_cast<uint16_t>(Size)); return; } EW.write(FirstByte::Map32); EW.write(Size); } void Writer::writeExt(int8_t Type, MemoryBufferRef Buffer) { size_t Size = Buffer.getBufferSize(); switch (Size) { case FixLen::Ext1: EW.write(FirstByte::FixExt1); break; case FixLen::Ext2: EW.write(FirstByte::FixExt2); break; case FixLen::Ext4: EW.write(FirstByte::FixExt4); break; case FixLen::Ext8: EW.write(FirstByte::FixExt8); break; case FixLen::Ext16: EW.write(FirstByte::FixExt16); break; default: if (Size <= UINT8_MAX) { EW.write(FirstByte::Ext8); EW.write(static_cast<uint8_t>(Size)); } else if (Size <= UINT16_MAX) { EW.write(FirstByte::Ext16); EW.write(static_cast<uint16_t>(Size)); } else { assert(Size <= UINT32_MAX && "Ext size too large to be encoded"); EW.write(FirstByte::Ext32); EW.write(static_cast<uint32_t>(Size)); } } EW.write(Type); EW.OS.write(Buffer.getBufferStart(), Size); } |