Repository navigation
Expand file tree
/
Copy pathmz_strm_split.c
More file actions
425 lines (345 loc) · 12.5 KB
/
Copy pathmz_strm_split.c
File metadata and controls
425 lines (345 loc) · 12.5 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
8000
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
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
/* mz_strm_split.c -- Stream for split files
part of the minizip-ng project
Copyright (C) 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_os.h"
#include "mz_strm.h"
#include "mz_strm_split.h"
#include <stdio.h> /* snprintf */
#include <string.h>
#if defined(_MSC_VER) && (_MSC_VER < 1900)
# define snprintf _snprintf
#endif
/***************************************************************************/
#define MZ_ZIP_MAGIC_DISKHEADER (0x08074b50)
/***************************************************************************/
static mz_stream_vtbl mz_stream_split_vtbl = {
mz_stream_split_open,
mz_stream_split_is_open,
mz_stream_split_read,
mz_stream_split_write,
mz_stream_split_tell,
mz_stream_split_seek,
mz_stream_split_close,
mz_stream_split_error,
mz_stream_split_create,
mz_stream_split_delete,
mz_stream_split_get_prop_int64,
mz_stream_split_set_prop_int64
};
/***************************************************************************/
typedef struct mz_stream_split_s {
mz_stream stream;
int32_t is_open;
int64_t disk_size;
int64_t total_in;
int64_t total_in_disk;
int64_t total_out;
int64_t total_out_disk;
int32_t mode;
char *path_cd;
char *path_disk;
uint32_t path_disk_size;
int32_t number_disk;
int32_t current_disk;
int64_t current_disk_size;
int32_t reached_end;
} mz_stream_split;
/***************************************************************************/
#if 0
# define mz_stream_split_print printf
#else
# define mz_stream_split_print(fmt, ...)
#endif
/***************************************************************************/
static int32_t mz_stream_split_open_disk(void *stream, int32_t number_disk) {
mz_stream_split *split = (mz_stream_split *)stream;
uint32_t magic = 0;
int64_t position = 0;
int32_t i = 0;
int32_t err = MZ_OK;
int16_t disk_part = 0;
/* Check if we are reading or writing a disk part or the cd disk */
if (number_disk >= 0) {
if ((split->mode & MZ_OPEN_MODE_WRITE) == 0)
disk_part = MZ_OPEN_MODE_READ;
else if (split->disk_size > 0)
disk_part = MZ_OPEN_MODE_WRITE;
}
/* Construct disk path */
if (disk_part > 0) {
for (i = (int32_t)strlen(split->path_disk) - 1; i >= 0; i -= 1) {
if (split->path_disk[i] != '.')
continue;
snprintf(&split->path_disk[i], split->path_disk_size - (uint32_t)i,
".z%02" PRId32, number_disk + 1);
break;
}
} else {
strncpy(split->path_disk, split->path_cd, split->path_disk_size - 1);
split->path_disk[split->path_disk_size - 1] = 0;
}
mz_stream_split_print("Split - Goto disk - %s (disk %" PRId32 ")\n", split->path_disk, number_disk);
/* If disk part doesn't exist during reading then return MZ_EXIST_ERROR */
if (disk_part == MZ_OPEN_MODE_READ)
err = mz_os_file_exists(split->path_disk);
if (err == MZ_OK)
err = mz_stream_open(split->stream.base, split->path_disk, split->mode);
if (err == MZ_OK) {
split->total_in_disk = 0;
split->total_out_disk = 0;
split->current_disk = number_disk;
if (split->mode & MZ_OPEN_MODE_WRITE) {
if ((split->current_disk == 0) && (split->disk_size > 0)) {
err = mz_stream_write_uint32(split->stream.base, MZ_ZIP_MAGIC_DISKHEADER);
split->total_out_disk += 4;
split->total_out += split->total_out_disk;
}
} else if (split->mode & MZ_OPEN_MODE_READ) {
if (split->current_disk == 0) {
err = mz_stream_read_uint32(split->stream.base, &magic);
if (magic != MZ_ZIP_MAGIC_DISKHEADER)
err = MZ_FORMAT_ERROR;
}
}
}
if (err == MZ_OK) {
/* Get the size of the current disk we are on */
position = mz_stream_tell(split->stream.base);
mz_stream_seek(split->stream.base, 0, MZ_SEEK_END);
split->current_disk_size = mz_stream_tell(split->stream.base);
mz_stream_seek(split->stream.base, position, MZ_SEEK_SET);
split->is_open = 1;
}
return err;
}
static int32_t mz_stream_split_close_disk(void *stream) {
mz_stream_split *split = (mz_stream_split *)stream;
if (mz_stream_is_open(split->stream.base) != MZ_OK)
return MZ_OK;
mz_stream_split_print("Split - Close disk\n");
return mz_stream_close(split->stream.base);
}
static int32_t mz_stream_split_goto_disk(void *stream, int32_t number_disk) {
mz_stream_split *split = (mz_stream_split *)stream;
int32_t err = MZ_OK;
int32_t err_is_open = MZ_OK;
err_is_open = mz_stream_is_open(split->stream.base);
if ((split->disk_size == 0) && (split->mode & MZ_OPEN_MODE_WRITE)) {
if (err_is_open != MZ_OK)
err = mz_stream_split_open_disk(stream, number_disk);
} else if ((number_disk != split->current_disk) || (err_is_open != MZ_OK)) {
err = mz_stream_split_close_disk(stream);
if (err == MZ_OK) {
err = mz_stream_split_open_disk(stream, number_disk);
if (err == MZ_OK)
split->number_disk = number_disk;
}
}
return err;
}
int32_t mz_stream_split_open(void *stream, const char *path, int32_t mode) {
mz_stream_split *split = (mz_stream_split *)stream;
int32_t number_disk = 0;
split->mode = mode;
split->path_cd = strdup(path);
if (!split->path_cd)
return MZ_MEM_ERROR;
mz_stream_split_print("Split - Open - %s (disk %" PRId32 ")\n", split->path_cd, number_disk);
split->path_disk_size = (uint32_t)strlen(path) + 10;
split->path_disk = (char *)malloc(split->path_disk_size);
if (!split->path_disk) {
free(split->path_cd);
return MZ_MEM_ERROR;
}
strncpy(split->path_disk, path, split->path_disk_size - 1);
split->path_disk[split->path_disk_size - 1] = 0;
if ((mode & MZ_OPEN_MODE_WRITE) && ((mode & MZ_OPEN_MODE_APPEND) == 0)) {
number_disk = 0;
split->current_disk = -1;
} else {
number_disk = -1;
split->current_disk = 0;
}
return mz_stream_split_goto_disk(stream, number_disk);
}
int32_t mz_stream_split_is_open(void *stream) {
mz_stream_split *split = (mz_stream_split *)stream;
if (split->is_open != 1)
return MZ_OPEN_ERROR;
return MZ_OK;
}
int32_t mz_stream_split_read(void *stream, void *buf, int32_t size) {
mz_stream_split *split = (mz_stream_split *)stream;
int32_t bytes_left = size;
int32_t read = 0;
int32_t err = MZ_OK;
uint8_t *buf_ptr = (uint8_t *)buf;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
while (bytes_left > 0) {
read = mz_stream_read(split->stream.base, buf_ptr, bytes_left);
mz_stream_split_print("Split - Read disk - %" PRId32 "\n", read);
if (read < 0)
return read;
if (read == 0) {
if (split->current_disk < 0) /* No more disks to goto */
break;
err = mz_stream_split_goto_disk(stream, split->current_disk + 1);
if (err == MZ_EXIST_ERROR) {
split->current_disk = -1;
break;
}
if (err != MZ_OK)
return err;
}
bytes_left -= read;
buf_ptr += read;
split->total_in += read;
split->total_in_disk += read;
}
return size - bytes_left;
}
int32_t mz_stream_split_write(void *stream, const void *buf, int32_t size) {
mz_stream_split *split = (mz_stream_split *)stream;
int64_t position = 0;
int32_t written = 0;
int32_t bytes_left = size;
int32_t bytes_to_write = 0;
int32_t bytes_avail = 0;
int32_t number_disk = -1;
int32_t err = MZ_OK;
const uint8_t *buf_ptr = (const uint8_t *)buf;
position = mz_stream_tell(split->stream.base);
while (bytes_left > 0) {
bytes_to_write = bytes_left;
if (split->disk_size > 0) {
if ((split->total_out_disk == split->disk_size && split->total_out > 0) ||
(split->number_disk == -1 && split->number_disk != split->current_disk)) {
if (split->number_disk != -1)
number_disk = split->current_disk + 1;
err = mz_stream_split_goto_disk(stream, number_disk);
if (err != MZ_OK)
return err;
position = 0;
}
if (split->number_disk != -1) {
bytes_avail = (int32_t)(split->disk_size - split->total_out_disk);
if (bytes_to_write > bytes_avail)
bytes_to_write = bytes_avail;
}
}
written = mz_stream_write(split->stream.base, buf_ptr, bytes_to_write);
if (written != bytes_to_write)
return MZ_WRITE_ERROR;
mz_stream_split_print("Split - Write disk - %" PRId32 "\n", written);
bytes_left -= written;
buf_ptr += written;
split-&
A562
gt;total_out += written;
split->total_out_disk += written;
position += written;
if (position > split->current_disk_size)
split->current_disk_size = position;
}
return size - bytes_left;
}
int64_t mz_stream_split_tell(void *stream) {
mz_stream_split *split = (mz_stream_split *)stream;
int32_t err = MZ_OK;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
return mz_stream_tell(split->stream.base);
}
int32_t mz_stream_split_seek(void *stream, int64_t offset, int32_t origin) {
mz_stream_split *split = (mz_stream_split *)stream;
int64_t disk_left = 0;
int64_t position = 0;
int32_t err = MZ_OK;
err = mz_stream_split_goto_disk(stream, split->number_disk);
if (err != MZ_OK)
return err;
mz_stream_split_print("Split - Seek disk - %" PRId64 " (origin %" PRId32 ")\n", offset, origin);
if ((origin == MZ_SEEK_CUR) && (split->number_disk != -1)) {
position = mz_stream_tell(split->stream.base);
disk_left = split->current_disk_size - position;
while (offset > disk_left) {
err = mz_stream_split_goto_disk(stream, split->current_disk + 1);
if (err != MZ_OK)
return err;
offset -= disk_left;
disk_left = split->current_disk_size;
}
}
return mz_stream_seek(split->stream.base, offset, origin);
}
int32_t mz_stream_split_close(void *stream) {
mz_stream_split *split = (mz_stream_split *)stream;
int32_t err = MZ_OK;
err = mz_stream_split_close_disk(stream);
split->is_open = 0;
return err;
}
int32_t mz_stream_split_error(void *stream) {
mz_stream_split *split = (mz_stream_split *)stream;
return mz_stream_error(split->stream.base);
}
int32_t mz_stream_split_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
mz_stream_split *split = (mz_stream_split *)stream;
switch (prop) {
case MZ_STREAM_PROP_TOTAL_OUT:
*value = split->total_out;
break;
case MZ_STREAM_PROP_DISK_NUMBER:
*value = split->number_disk;
break;
case MZ_STREAM_PROP_DISK_SIZE:
*value = split->disk_size;
break;
default:
return MZ_EXIST_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_split_set_prop_int64(void *stream, int32_t prop, int64_t value) {
mz_stream_split *split = (mz_stream_split *)stream;
switch (prop) {
case MZ_STREAM_PROP_DISK_NUMBER:
split->number_disk = (int32_t)value;
break;
case MZ_STREAM_PROP_DISK_SIZE:
split->disk_size = value;
break;
default:
return MZ_EXIST_ERROR;
}
return MZ_OK;
}
void *mz_stream_split_create(void) {
mz_stream_split *split = (mz_stream_split *)calloc(1, sizeof(mz_stream_split));
if (split)
split->stream.vtbl = &mz_stream_split_vtbl;
return split;
}
void mz_stream_split_delete(void **stream) {
mz_stream_split *split = NULL;
if (!stream)
return;
split = (mz_stream_split *)*stream;
if (split) {
if (split->path_cd)
free(split->path_cd);
if (split->path_disk)
free(split->path_disk);
free(split);
}
*stream = NULL;
}
void *mz_stream_split_get_interface(void) {
return (void *)&mz_stream_split_vtbl;
}