Repository navigation
Expand file tree
/
Copy pathmz_strm_libcomp.c
More file actions
353 lines (289 loc) · 9.68 KB
/
Copy pathmz_strm_libcomp.c
File metadata and controls
353 lines (289 loc) · 9.68 KB
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
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
/* mz_strm_libcomp.c -- Stream for apple compression
part of the minizip-ng project
Copyright (C) 2010-2021 Nathan Moinvaziri
https://github.com/zlib-ng/minizip-ng
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include "mz.h"
#include "mz_strm.h"
#include "mz_strm_libcomp.h"
#include <compression.h>
/***************************************************************************/
static mz_stream_vtbl mz_stream_libcomp_vtbl = {
mz_stream_libcomp_open,
mz_stream_libcomp_is_open,
mz_stream_libcomp_read,
mz_stream_libcomp_write,
mz_stream_libcomp_tell,
mz_stream_libcomp_seek,
mz_stream_libcomp_close,
mz_stream_libcomp_error,
mz_stream_libcomp_create,
mz_stream_libcomp_delete,
mz_stream_libcomp_get_prop_int64,
mz_stream_libcomp_set_prop_int64
};
/***************************************************************************/
typedef struct mz_stream_libcomp_s {
mz_stream stream;
compression_stream
cstream;
uint8_t buffer[INT16_MAX];
int32_t buffer_len;
int64_t total_in;
int64_t total_out;
int64_t max_total_in;
int8_t initialized;
int32_t mode;
int32_t error;
int16_t method;
} mz_stream_libcomp;
/***************************************************************************/
int32_t mz_stream_libcomp_open(void *stream, const char *path, int32_t mode) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
int32_t err = 0;
int16_t operation = 0;
compression_algorithm algorithm = 0;
MZ_UNUSED(path);
if (libcomp->method == 0)
return MZ_PARAM_ERROR;
libcomp->total_in = 0;
libcomp->total_out = 0;
if (mode & MZ_OPEN_MODE_WRITE) {
#ifdef MZ_ZIP_NO_COMPRESSION
return MZ_SUPPORT_ERROR;
#else
operation = COMPRESSION_STREAM_ENCODE;
#endif
} else if (mode & MZ_OPEN_MODE_READ) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
return MZ_SUPPORT_ERROR;
#else
operation = COMPRESSION_STREAM_DECODE;
#endif
}
if (libcomp->method == MZ_COMPRESS_METHOD_DEFLATE)
algorithm = COMPRESSION_ZLIB;
else if (libcomp->method == MZ_COMPRESS_METHOD_XZ)
algorithm = COMPRESSION_LZMA;
else
return MZ_SUPPORT_ERROR;
err = compression_stream_init(&libcomp->cstream, (compression_stream_operation)operation, algorithm);
if (err == COMPRESSION_STATUS_ERROR) {
libcomp->error = err;
return MZ_OPEN_ERROR;
}
libcomp->initialized = 1;
libcomp->mode = mode;
return MZ_OK;
}
int32_t mz_stream_libcomp_is_open(void *stream) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
if (libcomp->initialized != 1)
return MZ_OPEN_ERROR;
return MZ_OK;
}
int32_t mz_stream_libcomp_read(void *stream, void *buf, int32_t size) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
MZ_UNUSED(stream);
MZ_UNUSED(buf);
MZ_UNUSED(size);
return MZ_SUPPORT_ERROR;
#else
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
uint64_t total_in_before = 0;
uint64_t total_in_after = 0;
uint64_t total_out_before = 0;
uint64_t total_out_after = 0;
int32_t total_in = 0;
int32_t total_out = 0;
int32_t in_bytes = 0;
int32_t out_bytes = 0;
int32_t bytes_to_read = sizeof(libcomp->buffer);
int32_t read = 0;
int32_t err = MZ_OK;
int16_t flags = 0;
libcomp->cstream.dst_ptr = buf;
libcomp->cstream.dst_size = (size_t)size;
do {
if (libcomp->cstream.src_size == 0) {
if (libcomp->max_total_in > 0) {
if ((int64_t)bytes_to_read > (libcomp->max_total_in - libcomp->total_in))
bytes_to_read = (int32_t)(libcomp->max_total_in - libcomp->total_in);
}
read = mz_stream_read(libcomp->stream.base, libcomp->buffer, bytes_to_read);
if (read < 0)
return read;
if (read == 0)
flags = COMPRESSION_STREAM_FINALIZE;
libcomp->cstream.src_ptr = libcomp->buffer;
libcomp->cstream.src_size = (size_t)read;
}
total_in_before = libcomp->cstream.src_size;
total_out_before = libcomp->cstream.dst_size;
err = compression_stream_process(&libcomp->cstream, flags);
if (err == COMPRESSION_STATUS_ERROR) {
libcomp->error = err;
break;
}
total_in_after = libcomp->cstream.src_size;
total_out_after = libcomp->cstream.dst_size;
in_bytes = (int32_t)(total_in_before - total_in_after);
out_bytes = (int32_t)(total_out_before - total_out_after);
total_in += in_bytes;
total_out += out_bytes;
libcomp->total_in += in_bytes;
libcomp->total_out += out_bytes;
if (err == COMPRESSION_STATUS_END)
break;
if (err != COMPRESSION_STATUS_OK) {
libcomp->error = err;
break;
}
} while (libcomp->cstream.dst_size > 0);
if (libcomp->error != 0)
return MZ_DATA_ERROR;
return total_out;
#endif
}
static int32_t mz_stream_libcomp_flush(void *stream) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
if (mz_stream_write(libcomp->stream.base, libcomp->buffer, libcomp->buffer_len) != libcomp->buffer_len)
return MZ_WRITE_ERROR;
return MZ_OK;
}
static int32_t mz_stream_libcomp_deflate(void *stream, int flush) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
uint64_t total_out_before = 0;
uint64_t total_out_after = 0;
uint32_t out_bytes = 0;
int32_t err = MZ_OK;
do {
if (libcomp->cstream.dst_size == 0) {
err = mz_stream_libcomp_flush(libcomp);
if (err != MZ_OK) {
libcomp->error = err;
return err;
}
libcomp->cstream.dst_size = sizeof(libcomp->buffer);
libcomp->cstream.dst_ptr = libcomp->buffer;
libcomp->buffer_len = 0;
}
total_out_before = libcomp->cstream.dst_size;
err = compression_stream_process(&libcomp->cstream, flush);
total_out_after = libcomp->cstream.dst_size;
out_bytes = (uint32_t)(total_out_before - total_out_after);
libcomp->buffer_len += out_bytes;
libcomp->total_out += out_bytes;
if (err == COMPRESSION_STATUS_END)
break;
if (err != COMPRESSION_STATUS_OK) {
libcomp->error = err;
return MZ_DATA_ERROR;
}
} while ((libcomp->cstream.src_size > 0) || (flush == COMPRESSION_STREAM_FINALIZE && err == COMPRESSION_STATUS_OK));
return MZ_OK;
}
int32_t mz_stream_libcomp_write(void *stream, const void *buf, int32_t size) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
int32_t err = size;
#ifdef MZ_ZIP_NO_COMPRESSION
MZ_UNUSED(libcomp);
err = MZ_SUPPORT_ERROR;
#else
libcomp->cstream.src_ptr = buf;
libcomp->cstream.src_size = (size_t)size;
mz_stream_libcomp_deflate(stream, 0);
libcomp->total_in += size;
#endif
return err;
}
int64_t mz_stream_libcomp_tell(void *stream) {
MZ_UNUSED(stream);
return MZ_TELL_ERROR;
}
int32_t mz_stream_libcomp_seek(void *stream, int64_t offset, int32_t origin) {
MZ_UNUSED(stream);
MZ_UNUSED(offset);
MZ_UNUSED(origin);
return MZ_SEEK_ERROR;
}
int32_t mz_stream_libcomp_close(void *stream) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
if (libcomp->mode & MZ_OPEN_MODE_WRITE) {
#ifdef MZ_ZIP_NO_COMPRESSION
return MZ_SUPPORT_ERROR;
#else
mz_stream_libcomp_deflate(stream, COMPRESSION_STREAM_FINALIZE);
mz_stream_libcomp_flush(stream);
#endif
} else if (libcomp->mode & MZ_OPEN_MODE_READ) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
return MZ_SUPPORT_ERROR;
#endif
}
compression_stream_destroy(&libcomp->cstream);
libcomp->initialized = 0;
if (libcomp->error != MZ_OK)
return MZ_CLOSE_ERROR;
return MZ_OK;
}
int32_t mz_stream_libcomp_error(void *stream) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
return libcomp->error;
}
int32_t mz_stream_libcomp_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
switch (prop) {
case MZ_STREAM_PROP_TOTAL_IN:
*value = libcomp->total_in;
break;
case MZ_STREAM_PROP_TOTAL_IN_MAX:
*value = libcomp->max_total_in;
break;
case MZ_STREAM_PROP_TOTAL_OUT:
*value = libcomp->total_out;
break;
case MZ_STREAM_PROP_HEADER_SIZE:
*value = 0;
break;
default:
return MZ_EXIST_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_libcomp_set_prop_int64(void *stream, int32_t prop, int64_t value) {
mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
switch (prop) {
case MZ_STREAM_PROP_COMPRESS_METHOD:
libcomp->method = (int16_t)value;
break;
case MZ_STREAM_PROP_TOTAL_IN_MAX:
libcomp->max_total_in = value;
break;
default:
return MZ_EXIST_ERROR;
}
return MZ_OK;
}
void *mz_stream_libcomp_create(void **stream) {
mz_stream_libcomp *libcomp = NULL;
libcomp = (mz_stream_libcomp *)MZ_ALLOC(sizeof(mz_stream_libcomp));
if (libcomp != NULL) {
memset(libcomp, 0, sizeof(mz_stream_libcomp));
libcomp->stream.vtbl = &mz_stream_libcomp_vtbl;
}
if (stream != NULL)
*stream = libcomp;
return libcomp;
}
void mz_stream_libcomp_delete(void **stream) {
mz_stream_libcomp *libcomp = NULL;
if (stream == NULL)
return;
libcomp = (mz_stream_libcomp *)*stream;
if (libcomp != NULL)
MZ_FREE(libcomp);
*stream = NULL;
}