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
|
// Lzma2Decoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "../Common/StreamUtils.h"
#include "Lzma2Decoder.h"
static HRESULT SResToHRESULT(SRes res)
{
switch(res)
{
case SZ_OK: return S_OK;
case SZ_ERROR_MEM: return E_OUTOFMEMORY;
case SZ_ERROR_PARAM: return E_INVALIDARG;
// case SZ_ERROR_PROGRESS: return E_ABORT;
case SZ_ERROR_DATA: return S_FALSE;
}
return E_FAIL;
}
namespace NCompress {
namespace NLzma2 {
static const UInt32 kInBufSize = 1 << 20;
CDecoder::CDecoder(): _inBuf(0), _outSizeDefined(false)
{
Lzma2Dec_Construct(&_state);
}
static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
static void SzFree(void *p, void *address) { p = p; MyFree(address); }
static ISzAlloc g_Alloc = { SzAlloc, SzFree };
CDecoder::~CDecoder()
{
Lzma2Dec_Free(&_state, &g_Alloc);
MyFree(_inBuf);
}
STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *prop, UInt32 size)
{
if (size != 1) return SZ_ERROR_UNSUPPORTED;
RINOK(SResToHRESULT(Lzma2Dec_Allocate(&_state, prop[0], &g_Alloc)));
if (_inBuf == 0)
{
_inBuf = (Byte *)MyAlloc(kInBufSize);
if (_inBuf == 0)
return E_OUTOFMEMORY;
}
return S_OK;
}
STDMETHODIMP CDecoder::GetInStreamProcessedSize(UInt64 *value) { *value = _inSizeProcessed; return S_OK; }
STDMETHODIMP CDecoder::SetInStream(ISequentialInStream *inStream) { _inStream = inStream; return S_OK; }
STDMETHODIMP CDecoder::ReleaseInStream() { _inStream.Release(); return S_OK; }
STDMETHODIMP CDecoder::SetOutStreamSize(const UInt64 *outSize)
{
_outSizeDefined = (outSize != NULL);
if (_outSizeDefined)
_outSize = *outSize;
Lzma2Dec_Init(&_state);
_inPos = _inSize = 0;
_inSizeProcessed = _outSizeProcessed = 0;
return S_OK;
}
STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream, const UInt64 * /* inSize */,
const UInt64 *outSize, ICompressProgressInfo *progress)
{
if (_inBuf == 0)
return S_FALSE;
SetOutStreamSize(outSize);
for (;;)
{
if (_inPos == _inSize)
{
_inPos = _inSize = 0;
RINOK(inStream->Read(_inBuf, kInBufSize, &_inSize));
}
SizeT dicPos = _state.decoder.dicPos;
SizeT curSize = _state.decoder.dicBufSize - dicPos;
const UInt32 kStepSize = ((UInt32)1 << 22);
if (curSize > kStepSize)
curSize = (SizeT)kStepSize;
ELzmaFinishMode finishMode = LZMA_FINISH_ANY;
if (_outSizeDefined)
{
const UInt64 rem = _outSize - _outSizeProcessed;
if (rem < curSize)
{
curSize = (SizeT)rem;
/*
// finishMode = LZMA_FINISH_END;
we can't use LZMA_FINISH_END here to allow partial decoding
*/
}
}
SizeT inSizeProcessed = _inSize - _inPos;
ELzmaStatus status;
SRes res = Lzma2Dec_DecodeToDic(&_state, dicPos + curSize, _inBuf + _inPos, &inSizeProcessed, finishMode, &status);
_inPos += (UInt32)inSizeProcessed;
_inSizeProcessed += inSizeProcessed;
SizeT outSizeProcessed = _state.decoder.dicPos - dicPos;
_outSizeProcessed += outSizeProcessed;
bool finished = (inSizeProcessed == 0 && outSizeProcessed == 0);
bool stopDecoding = (_outSizeDefined && _outSizeProcessed >= _outSize);
if (res != 0 || _state.decoder.dicPos == _state.decoder.dicBufSize || finished || stopDecoding)
{
HRESULT res2 = WriteStream(outStream, _state.decoder.dic, _state.decoder.dicPos);
if (res != 0)
return S_FALSE;
RINOK(res2);
if (stopDecoding)
return S_OK;
if (finished)
return (status == LZMA_STATUS_FINISHED_WITH_MARK ? S_OK : S_FALSE);
}
if (_state.decoder.dicPos == _state.decoder.dicBufSize)
_state.decoder.dicPos = 0;
if (progress != NULL)
{
RINOK(progress->SetRatioInfo(&_inSizeProcessed, &_outSizeProcessed));
}
}
}
#ifndef NO_READ_FROM_CODER
STDMETHODIMP CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize)
*processedSize = 0;
do
{
if (_inPos == _inSize)
{
_inPos = _inSize = 0;
RINOK(_inStream->Read(_inBuf, kInBufSize, &_inSize));
}
{
SizeT inProcessed = _inSize - _inPos;
if (_outSizeDefined)
{
const UInt64 rem = _outSize - _outSizeProcessed;
if (rem < size)
size = (UInt32)rem;
}
SizeT outProcessed = size;
ELzmaStatus status;
SRes res = Lzma2Dec_DecodeToBuf(&_state, (Byte *)data, &outProcessed,
_inBuf + _inPos, &inProcessed, LZMA_FINISH_ANY, &status);
_inPos += (UInt32)inProcessed;
_inSizeProcessed += inProcessed;
_outSizeProcessed += outProcessed;
size -= (UInt32)outProcessed;
data = (Byte *)data + outProcessed;
if (processedSize)
*processedSize += (UInt32)outProcessed;
RINOK(SResToHRESULT(res));
if (inProcessed == 0 && outProcessed == 0)
return S_OK;
}
}
while (size != 0);
return S_OK;
}
#endif
}}
|
