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
|
/*
* Copyright (C) 2007-2012 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "bu/lzma.h"
#include "bu/trace.h"
#include <lzma.h>
#define pState ((lzma_stream *)prState)
using namespace Bu;
Bu::Lzma::Lzma( Bu::Stream &rNext, int nCompression, Format eFmt ) :
Bu::Filter( rNext ),
prState( NULL ),
nCompression( nCompression ),
sTotalOut( 0 ),
eFmt( eFmt ),
bEos( false )
{
TRACE( nCompression );
start();
}
Bu::Lzma::~Lzma()
{
TRACE();
stop();
}
void Bu::Lzma::start()
{
TRACE();
nBufSize = 64*1024;
pBuf = new char[nBufSize];
}
Bu::size Bu::Lzma::stop()
{
TRACE();
if( pState )
{
if( bReading )
{
lzma_end( pState );
delete[] pBuf;
pBuf = NULL;
delete pState;
prState = NULL;
return 0;
}
else
{
for(;;)
{
pState->next_in = NULL;
pState->avail_in = 0;
pState->avail_out = nBufSize;
pState->next_out = (uint8_t *)pBuf;
int res = lzma_code( pState, LZMA_FINISH );
if( pState->avail_out < nBufSize )
{
sTotalOut += rNext.write( pBuf, nBufSize-pState->avail_out );
}
if( res == LZMA_STREAM_END )
break;
}
lzma_end( pState );
delete[] pBuf;
pBuf = NULL;
delete pState;
prState = NULL;
return sTotalOut;
}
}
return 0;
}
void Bu::Lzma::lzmaError( int code )
{
TRACE( code );
switch( code )
{
case LZMA_OK:
case LZMA_STREAM_END:
case LZMA_NO_CHECK:
case LZMA_UNSUPPORTED_CHECK:
break;
case LZMA_MEM_ERROR:
throw ExceptionBase("Lzma: Memory allocation error.");
case LZMA_MEMLIMIT_ERROR:
throw ExceptionBase("Lzma: Memory usage limit was reached.");
case LZMA_FORMAT_ERROR:
throw ExceptionBase("Lzma: File format not recognized.");
case LZMA_OPTIONS_ERROR:
throw ExceptionBase("Lzma: Invalid or unsupported options.");
case LZMA_DATA_ERROR:
throw ExceptionBase("Lzma: Data is corrupt.");
case LZMA_BUF_ERROR:
throw ExceptionBase("Lzma: No progress is possible.");
case LZMA_PROG_ERROR:
throw ExceptionBase("Lzma: Programming error.");
default:
throw ExceptionBase("Lzma: Unknown error encountered." );
}
}
Bu::size Bu::Lzma::read( void *pData, Bu::size nBytes )
{
TRACE( pData, nBytes );
if( !pState )
{
prState = new ::lzma_stream;
lzma_stream zEmpty = LZMA_STREAM_INIT;
Bu::memcpy( prState, &zEmpty, sizeof(lzma_stream) );
bReading = true;
lzmaError( lzma_auto_decoder( pState, UINT64_MAX, 0 ) );
pState->next_in = (uint8_t *)pBuf;
pState->avail_in = 0;
}
if( bReading == false )
throw ExceptionBase("This lzma filter is in writing mode, you can't read.");
int nRead = 0;
int nReadTotal = pState->total_out;
pState->next_out = (uint8_t *)pData;
pState->avail_out = nBytes;
for(;;)
{
int ret = lzma_code( pState, LZMA_RUN );
// printf("inflate returned %d; avail in=%d, out=%d\n", ret,
// pState->avail_in, pState->avail_out );
nReadTotal += nRead-pState->avail_out;
if( ret == LZMA_STREAM_END )
{
bEos = true;
if( pState->avail_in > 0 )
{
if( rNext.isSeekable() )
{
rNext.seek( -pState->avail_in );
}
}
return nBytes-pState->avail_out;
}
// if( ret != LZMA_BUF_ERROR )
lzmaError( ret );
if( pState->avail_out )
{
if( pState->avail_in == 0 )
{
nRead = rNext.read( pBuf, nBufSize );
if( nRead == 0 && rNext.isEos() )
{
throw Bu::ExceptionBase("Premature end of underlying "
"stream found reading deflate stream.");
}
pState->next_in = (uint8_t *)pBuf;
pState->avail_in = nRead;
}
}
else
{
return nBytes-pState->avail_out;
}
}
return 0;
}
Bu::size Bu::Lzma::write( const void *pData, Bu::size nBytes )
{
TRACE( pData, nBytes );
if( !pState )
{
prState = new ::lzma_stream;
lzma_stream zEmpty = LZMA_STREAM_INIT;
Bu::memcpy( prState, &zEmpty, sizeof(lzma_stream) );
bReading = false;
if( eFmt == Xz )
lzmaError(
lzma_easy_encoder( pState, nCompression, LZMA_CHECK_CRC64 )
);
else if( eFmt == LzmaAlone )
{
lzma_options_lzma opt;
lzma_lzma_preset( &opt, nCompression );
lzmaError( lzma_alone_encoder( pState, &opt ) );
}
else
throw Bu::ExceptionBase("Invalid format for lzma.");
}
if( bReading == true )
throw ExceptionBase("This lzma filter is in reading mode, you can't write.");
pState->next_in = (uint8_t *)pData;
pState->avail_in = nBytes;
for(;;)
{
pState->avail_out = nBufSize;
pState->next_out = (uint8_t *)pBuf;
lzmaError( lzma_code( pState, LZMA_RUN ) );
if( pState->avail_out < nBufSize )
{
sTotalOut += rNext.write( pBuf, nBufSize-pState->avail_out );
}
if( pState->avail_in == 0 )
break;
}
return nBytes;
}
bool Bu::Lzma::isOpen()
{
TRACE();
return (pState != NULL);
}
bool Bu::Lzma::isEos()
{
TRACE();
return bEos;
}
Bu::size Bu::Lzma::getCompressedSize()
{
return sTotalOut;
}
|
