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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
//===- MsgPackReader.cpp - Simple MsgPack reader ----------------*- 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 reader.
///
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/MsgPackReader.h"
#include "llvm/BinaryFormat/MsgPack.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/MathExtras.h"
using namespace llvm;
using namespace llvm::support;
using namespace msgpack;
Reader::Reader(MemoryBufferRef InputBuffer)
: InputBuffer(InputBuffer), Current(InputBuffer.getBufferStart()),
End(InputBuffer.getBufferEnd()) {}
Reader::Reader(StringRef Input) : Reader({Input, "MsgPack"}) {}
Expected<bool> Reader::read(Object &Obj) {
if (Current == End)
return false;
uint8_t FB = static_cast<uint8_t>(*Current++);
switch (FB) {
case FirstByte::Nil:
Obj.Kind = Type::Nil;
return true;
case FirstByte::True:
Obj.Kind = Type::Boolean;
Obj.Bool = true;
return true;
case FirstByte::False:
Obj.Kind = Type::Boolean;
Obj.Bool = false;
return true;
case FirstByte::Int8:
Obj.Kind = Type::Int;
return readInt<int8_t>(Obj);
case FirstByte::Int16:
Obj.Kind = Type::Int;
return readInt<int16_t>(Obj);
case FirstByte::Int32:
Obj.Kind = Type::Int;
return readInt<int32_t>(Obj);
case FirstByte::Int64:
Obj.Kind = Type::Int;
return readInt<int64_t>(Obj);
case FirstByte::UInt8:
Obj.Kind = Type::UInt;
return readUInt<uint8_t>(Obj);
case FirstByte::UInt16:
Obj.Kind = Type::UInt;
return readUInt<uint16_t>(Obj);
case FirstByte::UInt32:
Obj.Kind = Type::UInt;
return readUInt<uint32_t>(Obj);
case FirstByte::UInt64:
Obj.Kind = Type::UInt;
return readUInt<uint64_t>(Obj);
case FirstByte::Float32:
Obj.Kind = Type::Float;
if (sizeof(float) > remainingSpace())
return make_error<StringError>(
"Invalid Float32 with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.Float = BitsToFloat(endian::read<uint32_t, Endianness>(Current));
Current += sizeof(float);
return true;
case FirstByte::Float64:
Obj.Kind = Type::Float;
if (sizeof(double) > remainingSpace())
return make_error<StringError>(
"Invalid Float64 with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.Float = BitsToDouble(endian::read<uint64_t, Endianness>(Current));
Current += sizeof(double);
return true;
case FirstByte::Str8:
Obj.Kind = Type::String;
return readRaw<uint8_t>(Obj);
case FirstByte::Str16:
Obj.Kind = Type::String;
return readRaw<uint16_t>(Obj);
case FirstByte::Str32:
Obj.Kind = Type::String;
return readRaw<uint32_t>(Obj);
case FirstByte::Bin8:
Obj.Kind = Type::Binary;
return readRaw<uint8_t>(Obj);
case FirstByte::Bin16:
Obj.Kind = Type::Binary;
return readRaw<uint16_t>(Obj);
case FirstByte::Bin32:
Obj.Kind = Type::Binary;
return readRaw<uint32_t>(Obj);
case FirstByte::Array16:
Obj.Kind = Type::Array;
return readLength<uint16_t>(Obj);
case FirstByte::Array32:
Obj.Kind = Type::Array;
return readLength<uint32_t>(Obj);
case FirstByte::Map16:
Obj.Kind = Type::Map;
return readLength<uint16_t>(Obj);
case FirstByte::Map32:
Obj.Kind = Type::Map;
return readLength<uint32_t>(Obj);
case FirstByte::FixExt1:
Obj.Kind = Type::Extension;
return createExt(Obj, FixLen::Ext1);
case FirstByte::FixExt2:
Obj.Kind = Type::Extension;
return createExt(Obj, FixLen::Ext2);
case FirstByte::FixExt4:
Obj.Kind = Type::Extension;
return createExt(Obj, FixLen::Ext4);
case FirstByte::FixExt8:
Obj.Kind = Type::Extension;
return createExt(Obj, FixLen::Ext8);
case FirstByte::FixExt16:
Obj.Kind = Type::Extension;
return createExt(Obj, FixLen::Ext16);
case FirstByte::Ext8:
Obj.Kind = Type::Extension;
return readExt<uint8_t>(Obj);
case FirstByte::Ext16:
Obj.Kind = Type::Extension;
return readExt<uint16_t>(Obj);
case FirstByte::Ext32:
Obj.Kind = Type::Extension;
return readExt<uint32_t>(Obj);
}
if ((FB & FixBitsMask::NegativeInt) == FixBits::NegativeInt) {
Obj.Kind = Type::Int;
int8_t I;
static_assert(sizeof(I) == sizeof(FB), "Unexpected type sizes");
memcpy(&I, &FB, sizeof(FB));
Obj.Int = I;
return true;
}
if ((FB & FixBitsMask::PositiveInt) == FixBits::PositiveInt) {
Obj.Kind = Type::UInt;
Obj.UInt = FB;
return true;
}
if ((FB & FixBitsMask::String) == FixBits::String) {
Obj.Kind = Type::String;
uint8_t Size = FB & ~FixBitsMask::String;
return createRaw(Obj, Size);
}
if ((FB & FixBitsMask::Array) == FixBits::Array) {
Obj.Kind = Type::Array;
Obj.Length = FB & ~FixBitsMask::Array;
return true;
}
if ((FB & FixBitsMask::Map) == FixBits::Map) {
Obj.Kind = Type::Map;
Obj.Length = FB & ~FixBitsMask::Map;
return true;
}
return make_error<StringError>(
"Invalid first byte", std::make_error_code(std::errc::invalid_argument));
}
template <class T> Expected<bool> Reader::readRaw(Object &Obj) {
if (sizeof(T) > remainingSpace())
return make_error<StringError>(
"Invalid Raw with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
T Size = endian::read<T, Endianness>(Current);
Current += sizeof(T);
return createRaw(Obj, Size);
}
template <class T> Expected<bool> Reader::readInt(Object &Obj) {
if (sizeof(T) > remainingSpace())
return make_error<StringError>(
"Invalid Int with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.Int = static_cast<int64_t>(endian::read<T, Endianness>(Current));
Current += sizeof(T);
return true;
}
template <class T> Expected<bool> Reader::readUInt(Object &Obj) {
if (sizeof(T) > remainingSpace())
return make_error<StringError>(
"Invalid Int with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.UInt = static_cast<uint64_t>(endian::read<T, Endianness>(Current));
Current += sizeof(T);
return true;
}
template <class T> Expected<bool> Reader::readLength(Object &Obj) {
if (sizeof(T) > remainingSpace())
return make_error<StringError>(
"Invalid Map/Array with invalid length",
std::make_error_code(std::errc::invalid_argument));
Obj.Length = static_cast<size_t>(endian::read<T, Endianness>(Current));
Current += sizeof(T);
return true;
}
template <class T> Expected<bool> Reader::readExt(Object &Obj) {
if (sizeof(T) > remainingSpace())
return make_error<StringError>(
"Invalid Ext with invalid length",
std::make_error_code(std::errc::invalid_argument));
T Size = endian::read<T, Endianness>(Current);
Current += sizeof(T);
return createExt(Obj, Size);
}
Expected<bool> Reader::createRaw(Object &Obj, uint32_t Size) {
if (Size > remainingSpace())
return make_error<StringError>(
"Invalid Raw with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.Raw = StringRef(Current, Size);
Current += Size;
return true;
}
Expected<bool> Reader::createExt(Object &Obj, uint32_t Size) {
if (Current == End)
return make_error<StringError>(
"Invalid Ext with no type",
std::make_error_code(std::errc::invalid_argument));
Obj.Extension.Type = *Current++;
if (Size > remainingSpace())
return make_error<StringError>(
"Invalid Ext with insufficient payload",
std::make_error_code(std::errc::invalid_argument));
Obj.Extension.Bytes = StringRef(Current, Size);
Current += Size;
return true;
}
|
