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
|
// LzmaRam.cpp
#include "StdAfx.h"
#include "../../../Common/Types.h"
#include "../LZMA/LZMADecoder.h"
#include "../LZMA/LZMAEncoder.h"
#include "LzmaRam.h"
extern "C"
{
#include "../Branch/BranchX86.h"
}
class CInStreamRam:
public ISequentialInStream,
public CMyUnknownImp
{
const Byte *Data;
size_t Size;
size_t Pos;
public:
MY_UNKNOWN_IMP
void Init(const Byte *data, size_t size)
{
Data = data;
Size = size;
Pos = 0;
}
STDMETHOD(Read)(void *data, UInt32 size, UInt32 *processedSize);
};
STDMETHODIMP CInStreamRam::Read(void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 remain = Size - Pos;
if (size > remain)
size = remain;
for (UInt32 i = 0; i < size; i++)
((Byte *)data)[i] = Data[Pos + i];
Pos += size;
if(processedSize != NULL)
*processedSize = size;
return S_OK;
}
class COutStreamRam:
public ISequentialOutStream,
public CMyUnknownImp
{
size_t Size;
public:
Byte *Data;
size_t Pos;
bool Overflow;
void Init(Byte *data, size_t size)
{
Data = data;
Size = size;
Pos = 0;
Overflow = false;
}
void SetPos(size_t pos)
{
Overflow = false;
Pos = pos;
}
MY_UNKNOWN_IMP
HRESULT WriteByte(Byte b)
{
if (Pos >= Size)
{
Overflow = true;
return E_FAIL;
}
Data[Pos++] = b;
return S_OK;
}
STDMETHOD(Write)(const void *data, UInt32 size, UInt32 *processedSize);
};
STDMETHODIMP COutStreamRam::Write(const void *data, UInt32 size, UInt32 *processedSize)
{
UInt32 i;
for (i = 0; i < size && Pos < Size; i++)
Data[Pos++] = ((const Byte *)data)[i];
if(processedSize != NULL)
*processedSize = i;
if (i != size)
{
Overflow = true;
return E_FAIL;
}
return S_OK;
}
#define SZE_FAIL (1)
#define SZE_OUTOFMEMORY (2)
#define SZE_OUT_OVERFLOW (3)
int LzmaRamEncode(
const Byte *inBuffer, size_t inSize,
Byte *outBuffer, size_t outSize, size_t *outSizeProcessed,
UInt32 dictionarySize, ESzFilterMode filterMode)
{
#ifndef _NO_EXCEPTIONS
try {
#endif
*outSizeProcessed = 0;
const size_t kIdSize = 1;
const size_t kLzmaPropsSize = 5;
const size_t kMinDestSize = kIdSize + kLzmaPropsSize + 8;
if (outSize < kMinDestSize)
return SZE_OUT_OVERFLOW;
NCompress::NLZMA::CEncoder *encoderSpec = new NCompress::NLZMA::CEncoder;
CMyComPtr<ICompressCoder> encoder = encoderSpec;
PROPID propIDs[] =
{
NCoderPropID::kAlgorithm,
NCoderPropID::kDictionarySize,
NCoderPropID::kNumFastBytes,
};
const int kNumProps = sizeof(propIDs) / sizeof(propIDs[0]);
PROPVARIANT properties[kNumProps];
properties[0].vt = VT_UI4;
properties[1].vt = VT_UI4;
properties[2].vt = VT_UI4;
properties[0].ulVal = (UInt32)2;
properties[1].ulVal = (UInt32)dictionarySize;
properties[2].ulVal = (UInt32)64;
if (encoderSpec->SetCoderProperties(propIDs, properties, kNumProps) != S_OK)
return 1;
COutStreamRam *outStreamSpec = new COutStreamRam;
if (outStreamSpec == 0)
return SZE_OUTOFMEMORY;
CMyComPtr<ISequentialOutStream> outStream = outStreamSpec;
CInStreamRam *inStreamSpec = new CInStreamRam;
if (inStreamSpec == 0)
return SZE_OUTOFMEMORY;
CMyComPtr<ISequentialInStream> inStream = inStreamSpec;
outStreamSpec->Init(outBuffer, outSize);
if (outStreamSpec->WriteByte(0) != S_OK)
return SZE_OUT_OVERFLOW;
if (encoderSpec->WriteCoderProperties(outStream) != S_OK)
return SZE_OUT_OVERFLOW;
if (outStreamSpec->Pos != kIdSize + kLzmaPropsSize)
return 1;
int i;
for (i = 0; i < 8; i++)
{
UInt64 t = (UInt64)(inSize);
if (outStreamSpec->WriteByte((Byte)((t) >> (8 * i))) != S_OK)
return SZE_OUT_OVERFLOW;
}
Byte *filteredStream = 0;
bool useFilter = (filterMode != SZ_FILTER_NO);
if (useFilter)
{
if (inSize != 0)
{
filteredStream = (Byte *)MyAlloc(inSize);
if (filteredStream == 0)
return SZE_OUTOFMEMORY;
memmove(filteredStream, inBuffer, inSize);
}
UInt32 _prevMask;
UInt32 _prevPos;
x86_Convert_Init(_prevMask, _prevPos);
x86_Convert(filteredStream, (UInt32)inSize, 0, &_prevMask, &_prevPos, 1);
}
UInt32 minSize = 0;
int numPasses = (filterMode == SZ_FILTER_AUTO) ? 3 : 1;
bool bestIsFiltered = false;
int mainResult = 0;
size_t startPos = outStreamSpec->Pos;
for (i = 0; i < numPasses; i++)
{
if (numPasses > 1 && i == numPasses - 1 && !bestIsFiltered)
break;
outStreamSpec->SetPos(startPos);
bool curModeIsFiltered = false;
if (useFilter && i == 0)
curModeIsFiltered = true;
if (numPasses > 1 && i == numPasses - 1)
curModeIsFiltered = true;
inStreamSpec->Init(curModeIsFiltered ? filteredStream : inBuffer, inSize);
HRESULT lzmaResult = encoder->Code(inStream, outStream, 0, 0, 0);
mainResult = 0;
if (lzmaResult == E_OUTOFMEMORY)
{
mainResult = SZE_OUTOFMEMORY;
break;
}
if (i == 0 || outStreamSpec->Pos <= minSize)
{
minSize = outStreamSpec->Pos;
bestIsFiltered = curModeIsFiltered;
}
if (outStreamSpec->Overflow)
mainResult = SZE_OUT_OVERFLOW;
else if (lzmaResult != S_OK)
{
mainResult = SZE_FAIL;
break;
}
}
*outSizeProcessed = outStreamSpec->Pos;
if (bestIsFiltered)
outBuffer[0] = 1;
if (useFilter)
MyFree(filteredStream);
return mainResult;
#ifndef _NO_EXCEPTIONS
} catch(...) { return SZE_OUTOFMEMORY; }
#endif
}
|
