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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
#pragma once
#include "coding/endianness.hpp"
#include "base/assert.hpp"
#include "base/macros.hpp"
#include <type_traits>
#if defined(__clang__)
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-local-typedef"
#endif
#include "3party/succinct/mappable_vector.hpp"
#include "3party/succinct/mapper.hpp"
#if defined(__clang__)
#pragma clang diagnostic pop
#endif
namespace coding
{
template <typename T>
static T * Align8Ptr(T * ptr)
{
uint64_t const value = (reinterpret_cast<uint64_t>(ptr) + 0x7) & 0xfffffffffffffff8;
return reinterpret_cast<T *>(value);
}
inline uint32_t ToAlign8(uint64_t written) { return (0x8 - (written & 0x7)) & 0x7; }
inline bool IsAlign8(uint64_t offset) { return ToAlign8(offset) == 0; }
template <typename TWriter>
void WritePadding(TWriter & writer, uint64_t & bytesWritten)
{
static uint64_t const zero = 0;
uint32_t const padding = ToAlign8(bytesWritten);
if (padding == 0)
return;
writer.Write(&zero, padding);
bytesWritten += padding;
}
class MapVisitor
{
public:
explicit MapVisitor(uint8_t const * base) : m_base(base), m_cur(m_base) {}
template <typename T>
std::enable_if_t<!std::is_pod<T>::value, MapVisitor &> operator()(T & val,
char const * /* name */)
{
val.map(*this);
return *this;
}
template <typename T>
std::enable_if_t<std::is_pod<T>::value, MapVisitor &> operator()(T & val, char const * /* name */)
{
T const * valPtr = reinterpret_cast<T const *>(m_cur);
val = *valPtr;
m_cur = Align8Ptr(m_cur + sizeof(T));
return *this;
}
template <typename T>
MapVisitor & operator()(succinct::mapper::mappable_vector<T> & vec, char const * /* name */)
{
vec.clear();
(*this)(vec.m_size, "size");
vec.m_data = reinterpret_cast<const T *>(m_cur);
m_cur = Align8Ptr(m_cur + vec.m_size * sizeof(T));
return *this;
}
uint64_t BytesRead() const { return static_cast<uint64_t>(m_cur - m_base); }
private:
uint8_t const * const m_base;
uint8_t const * m_cur;
DISALLOW_COPY_AND_MOVE(MapVisitor);
};
class ReverseMapVisitor
{
public:
explicit ReverseMapVisitor(uint8_t * base) : m_base(base), m_cur(m_base) {}
template <typename T>
std::enable_if_t<!std::is_pod<T>::value, ReverseMapVisitor &> operator()(T & val,
char const * /* name */)
{
val.map(*this);
return *this;
}
template <typename T>
std::enable_if_t<std::is_pod<T>::value, ReverseMapVisitor &> operator()(T & val,
char const * /* name */)
{
T * valPtr = reinterpret_cast<T *>(m_cur);
*valPtr = ReverseByteOrder(*valPtr);
val = *valPtr;
m_cur = Align8Ptr(m_cur + sizeof(T));
return *this;
}
template <typename T>
ReverseMapVisitor & operator()(succinct::mapper::mappable_vector<T> & vec,
char const * /* name */)
{
vec.clear();
(*this)(vec.m_size, "size");
T * data = reinterpret_cast<T *>(m_cur);
for (uint64_t i = 0; i < vec.m_size; ++i)
data[i] = ReverseByteOrder(data[i]);
vec.m_data = data;
m_cur = Align8Ptr(m_cur + vec.m_size * sizeof(T));
return *this;
}
uint64_t BytesRead() const { return static_cast<uint64_t>(m_cur - m_base); }
private:
uint8_t * const m_base;
uint8_t * m_cur;
DISALLOW_COPY_AND_MOVE(ReverseMapVisitor);
};
template <typename TWriter>
class FreezeVisitor
{
public:
explicit FreezeVisitor(TWriter & writer) : m_writer(writer), m_bytesWritten(0) {}
template <typename T>
std::enable_if_t<!std::is_pod<T>::value, FreezeVisitor &> operator()(T & val,
char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
val.map(*this);
return *this;
}
template <typename T>
std::enable_if_t<std::is_pod<T>::value, FreezeVisitor &> operator()(T & val,
char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
m_writer.Write(&val, sizeof(T));
m_bytesWritten += sizeof(T);
WritePadding(m_writer, m_bytesWritten);
return *this;
}
template <typename T>
FreezeVisitor & operator()(succinct::mapper::mappable_vector<T> & vec, char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
(*this)(vec.m_size, "size");
size_t const bytes = static_cast<size_t>(vec.m_size * sizeof(T));
m_writer.Write(vec.m_data, bytes);
m_bytesWritten += bytes;
WritePadding(m_writer, m_bytesWritten);
return *this;
}
uint64_t BytesWritten() const { return m_bytesWritten; }
private:
TWriter & m_writer;
uint64_t m_bytesWritten;
DISALLOW_COPY_AND_MOVE(FreezeVisitor);
};
template <typename TWriter>
class ReverseFreezeVisitor
{
public:
explicit ReverseFreezeVisitor(TWriter & writer) : m_writer(writer), m_bytesWritten(0) {}
template <typename T>
std::enable_if_t<!std::is_pod<T>::value, ReverseFreezeVisitor &> operator()(
T & val, char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
val.map(*this);
return *this;
}
template <typename T>
std::enable_if_t<std::is_pod<T>::value, ReverseFreezeVisitor &> operator()(
T & val, char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
T const reversedVal = ReverseByteOrder(val);
m_writer.Write(&reversedVal, sizeof(reversedVal));
m_bytesWritten += sizeof(T);
WritePadding(m_writer, m_bytesWritten);
return *this;
}
template <typename T>
ReverseFreezeVisitor & operator()(succinct::mapper::mappable_vector<T> & vec,
char const * /* name */)
{
ASSERT(IsAlign8(m_writer.Pos()), ());
(*this)(vec.m_size, "size");
for (auto const & val : vec)
{
T const reversedVal = ReverseByteOrder(val);
m_writer.Write(&reversedVal, sizeof(reversedVal));
}
m_bytesWritten += static_cast<size_t>(vec.m_size * sizeof(T));
WritePadding(m_writer, m_bytesWritten);
return *this;
}
uint64_t BytesWritten() const { return m_bytesWritten; }
private:
TWriter & m_writer;
uint64_t m_bytesWritten;
DISALLOW_COPY_AND_MOVE(ReverseFreezeVisitor);
};
template <typename T>
uint64_t Map(T & value, uint8_t const * base, char const * name)
{
MapVisitor visitor(base);
visitor(value, name);
return visitor.BytesRead();
}
template <typename T>
uint64_t ReverseMap(T & value, uint8_t * base, char const * name)
{
ReverseMapVisitor visitor(base);
visitor(value, name);
return visitor.BytesRead();
}
template <typename T, typename TWriter>
uint64_t Freeze(T & val, TWriter & writer, char const * name)
{
FreezeVisitor<TWriter> visitor(writer);
visitor(val, name);
return visitor.BytesWritten();
}
template <typename T, typename TWriter>
uint64_t ReverseFreeze(T & val, TWriter & writer, char const * name)
{
ReverseFreezeVisitor<TWriter> visitor(writer);
visitor(val, name);
return visitor.BytesWritten();
}
} // namespace coding
|
