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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (archive_file.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #include <compat/strl.h> | |
28 | #include <file/archive_file.h> | |
29 | #include <file/file_path.h> | |
30 | #include <streams/file_stream.h> | |
31 | #include <retro_miscellaneous.h> | |
32 | #include <lists/string_list.h> | |
33 | #include <string/stdstring.h> | |
34 | ||
35 | #ifdef HAVE_MMAP | |
36 | #include <fcntl.h> | |
37 | #include <errno.h> | |
38 | #include <unistd.h> | |
39 | #include <sys/mman.h> | |
40 | #include <sys/stat.h> | |
41 | #endif | |
42 | ||
43 | static int file_archive_get_file_list_cb( | |
44 | const char *path, | |
45 | const char *valid_exts, | |
46 | const uint8_t *cdata, | |
47 | unsigned cmode, | |
48 | uint32_t csize, | |
49 | uint32_t size, | |
50 | uint32_t checksum, | |
51 | struct archive_extract_userdata *userdata) | |
52 | { | |
53 | union string_list_elem_attr attr; | |
54 | attr.i = 0; | |
55 | ||
56 | if (valid_exts) | |
57 | { | |
58 | size_t path_len = strlen(path); | |
59 | /* Checks if this entry is a directory or a file. */ | |
60 | char last_char = path[path_len - 1]; | |
61 | struct string_list ext_list = {0}; | |
62 | ||
63 | /* Skip if directory. */ | |
64 | if (last_char == '/' || last_char == '\\' ) | |
65 | return 1; | |
66 | ||
67 | string_list_initialize(&ext_list); | |
68 | if (string_split_noalloc(&ext_list, valid_exts, "|")) | |
69 | { | |
70 | const char *file_ext = path_get_extension(path); | |
71 | ||
72 | if (!file_ext) | |
73 | { | |
74 | string_list_deinitialize(&ext_list); | |
75 | return 1; | |
76 | } | |
77 | ||
78 | if (!string_list_find_elem_prefix(&ext_list, ".", file_ext)) | |
79 | { | |
80 | /* keep iterating */ | |
81 | string_list_deinitialize(&ext_list); | |
82 | return -1; | |
83 | } | |
84 | ||
85 | attr.i = RARCH_COMPRESSED_FILE_IN_ARCHIVE; | |
86 | } | |
87 | ||
88 | string_list_deinitialize(&ext_list); | |
89 | } | |
90 | ||
91 | return string_list_append(userdata->list, path, attr); | |
92 | } | |
93 | ||
94 | static int file_archive_extract_cb(const char *name, const char *valid_exts, | |
95 | const uint8_t *cdata, | |
96 | unsigned cmode, uint32_t csize, uint32_t size, | |
97 | uint32_t checksum, struct archive_extract_userdata *userdata) | |
98 | { | |
99 | const char *ext = path_get_extension(name); | |
100 | ||
101 | /* Extract first file that matches our list. */ | |
102 | if (ext && string_list_find_elem(userdata->ext, ext)) | |
103 | { | |
104 | char new_path[PATH_MAX_LENGTH]; | |
105 | const char *delim; | |
106 | ||
107 | if ((delim = path_get_archive_delim(userdata->archive_path))) | |
108 | { | |
109 | if (!string_is_equal_noncase( | |
110 | userdata->current_file_path, delim + 1)) | |
111 | return 1; /* keep searching for the right file */ | |
112 | } | |
113 | ||
114 | if (userdata->extraction_directory) | |
115 | fill_pathname_join_special(new_path, userdata->extraction_directory, | |
116 | path_basename(name), sizeof(new_path)); | |
117 | else | |
118 | fill_pathname_resolve_relative(new_path, userdata->archive_path, | |
119 | path_basename(name), sizeof(new_path)); | |
120 | ||
121 | if (file_archive_perform_mode(new_path, | |
122 | valid_exts, cdata, cmode, csize, size, | |
123 | checksum, userdata)) | |
124 | { | |
125 | userdata->found_file = true; | |
126 | userdata->first_extracted_file_path = strdup(new_path); | |
127 | } | |
128 | ||
129 | return 0; | |
130 | } | |
131 | ||
132 | return 1; | |
133 | } | |
134 | ||
135 | static int file_archive_parse_file_init(file_archive_transfer_t *state, | |
136 | const char *file) | |
137 | { | |
138 | char path[PATH_MAX_LENGTH]; | |
139 | char *last = NULL; | |
140 | ||
141 | strlcpy(path, file, sizeof(path)); | |
142 | ||
143 | if ((last = (char*)path_get_archive_delim(path))) | |
144 | *last = '\0'; | |
145 | ||
146 | if (!(state->backend = file_archive_get_file_backend(path))) | |
147 | return -1; | |
148 | ||
149 | /* Failed to open archive. */ | |
150 | if (!(state->archive_file = filestream_open(path, | |
151 | RETRO_VFS_FILE_ACCESS_READ, | |
152 | RETRO_VFS_FILE_ACCESS_HINT_NONE))) | |
153 | return -1; | |
154 | ||
155 | state->archive_size = filestream_get_size(state->archive_file); | |
156 | ||
157 | #ifdef HAVE_MMAP | |
158 | if (state->archive_size <= (256*1024*1024)) | |
159 | { | |
160 | state->archive_mmap_fd = open(path, O_RDONLY); | |
161 | if (state->archive_mmap_fd) | |
162 | { | |
163 | state->archive_mmap_data = (uint8_t*)mmap(NULL, (size_t)state->archive_size, | |
164 | PROT_READ, MAP_SHARED, state->archive_mmap_fd, 0); | |
165 | ||
166 | if (state->archive_mmap_data == (uint8_t*)MAP_FAILED) | |
167 | { | |
168 | close(state->archive_mmap_fd); | |
169 | state->archive_mmap_fd = 0; | |
170 | state->archive_mmap_data = NULL; | |
171 | } | |
172 | } | |
173 | } | |
174 | #endif | |
175 | ||
176 | state->step_current = 0; | |
177 | state->step_total = 0; | |
178 | ||
179 | return state->backend->archive_parse_file_init(state, path); | |
180 | } | |
181 | ||
182 | /** | |
183 | * file_archive_decompress_data_to_file: | |
184 | * @path : filename path of archive. | |
185 | * @size : output file size | |
186 | * @checksum : CRC32 checksum from input data. | |
187 | * | |
188 | * Write data to file. | |
189 | * | |
190 | * Returns: true (1) on success, otherwise false (0). | |
191 | **/ | |
192 | static int file_archive_decompress_data_to_file( | |
193 | file_archive_transfer_t *transfer, | |
194 | file_archive_file_handle_t *handle, | |
195 | const char *path, | |
196 | uint32_t size, | |
197 | uint32_t checksum) | |
198 | { | |
199 | if (!handle) | |
200 | return 0; | |
201 | ||
202 | #if 0 | |
203 | handle->real_checksum = transfer->backend->stream_crc_calculate( | |
204 | 0, handle->data, size); | |
205 | if (handle->real_checksum != checksum) | |
206 | { | |
207 | /* File CRC difers from archive CRC. */ | |
208 | printf("File CRC differs from archive CRC. File: 0x%x, Archive: 0x%x.\n", | |
209 | (unsigned)handle->real_checksum, (unsigned)checksum); | |
210 | } | |
211 | #endif | |
212 | ||
213 | if (!filestream_write_file(path, handle->data, size)) | |
214 | return 0; | |
215 | ||
216 | return 1; | |
217 | } | |
218 | ||
219 | void file_archive_parse_file_iterate_stop(file_archive_transfer_t *state) | |
220 | { | |
221 | if (!state || !state->archive_file) | |
222 | return; | |
223 | ||
224 | state->type = ARCHIVE_TRANSFER_DEINIT; | |
225 | file_archive_parse_file_iterate(state, NULL, NULL, NULL, NULL, NULL); | |
226 | } | |
227 | ||
228 | int file_archive_parse_file_iterate( | |
229 | file_archive_transfer_t *state, | |
230 | bool *returnerr, | |
231 | const char *file, | |
232 | const char *valid_exts, | |
233 | file_archive_file_cb file_cb, | |
234 | struct archive_extract_userdata *userdata) | |
235 | { | |
236 | if (!state) | |
237 | return -1; | |
238 | ||
239 | switch (state->type) | |
240 | { | |
241 | case ARCHIVE_TRANSFER_NONE: | |
242 | break; | |
243 | case ARCHIVE_TRANSFER_INIT: | |
244 | if (file_archive_parse_file_init(state, file) == 0) | |
245 | { | |
246 | if (userdata) | |
247 | { | |
248 | userdata->transfer = state; | |
249 | strlcpy(userdata->archive_path, file, | |
250 | sizeof(userdata->archive_path)); | |
251 | } | |
252 | state->type = ARCHIVE_TRANSFER_ITERATE; | |
253 | } | |
254 | else | |
255 | state->type = ARCHIVE_TRANSFER_DEINIT_ERROR; | |
256 | break; | |
257 | case ARCHIVE_TRANSFER_ITERATE: | |
258 | if (state->backend) | |
259 | { | |
260 | int ret = state->backend->archive_parse_file_iterate_step( | |
261 | state->context, valid_exts, userdata, file_cb); | |
262 | ||
263 | if (ret == 1) | |
264 | state->step_current++; /* found another file */ | |
265 | if (ret != 1) | |
266 | state->type = ARCHIVE_TRANSFER_DEINIT; | |
267 | if (ret == -1) | |
268 | state->type = ARCHIVE_TRANSFER_DEINIT_ERROR; | |
269 | ||
270 | /* early return to prevent deinit from never firing */ | |
271 | return 0; | |
272 | } | |
273 | return -1; | |
274 | case ARCHIVE_TRANSFER_DEINIT_ERROR: | |
275 | *returnerr = false; | |
276 | case ARCHIVE_TRANSFER_DEINIT: | |
277 | if (state->context) | |
278 | { | |
279 | if (state->backend->archive_parse_file_free) | |
280 | state->backend->archive_parse_file_free(state->context); | |
281 | state->context = NULL; | |
282 | } | |
283 | ||
284 | if (state->archive_file) | |
285 | { | |
286 | filestream_close(state->archive_file); | |
287 | state->archive_file = NULL; | |
288 | } | |
289 | ||
290 | #ifdef HAVE_MMAP | |
291 | if (state->archive_mmap_data) | |
292 | { | |
293 | munmap(state->archive_mmap_data, (size_t)state->archive_size); | |
294 | close(state->archive_mmap_fd); | |
295 | state->archive_mmap_fd = 0; | |
296 | state->archive_mmap_data = NULL; | |
297 | } | |
298 | #endif | |
299 | ||
300 | if (userdata) | |
301 | userdata->transfer = NULL; | |
302 | break; | |
303 | } | |
304 | ||
305 | if ( state->type == ARCHIVE_TRANSFER_DEINIT || | |
306 | state->type == ARCHIVE_TRANSFER_DEINIT_ERROR) | |
307 | return -1; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | /** | |
313 | * file_archive_walk: | |
314 | * @file : filename path of archive | |
315 | * @valid_exts : Valid extensions of archive to be parsed. | |
316 | * If NULL, allow all. | |
317 | * @file_cb : file_cb function pointer | |
318 | * @userdata : userdata to pass to file_cb function pointer. | |
319 | * | |
320 | * Low-level file parsing. Enumerates over all files and calls | |
321 | * file_cb with userdata. | |
322 | * | |
323 | * Returns: true (1) on success, otherwise false (0). | |
324 | **/ | |
325 | static bool file_archive_walk(const char *file, const char *valid_exts, | |
326 | file_archive_file_cb file_cb, struct archive_extract_userdata *userdata) | |
327 | { | |
328 | file_archive_transfer_t state; | |
329 | bool returnerr = true; | |
330 | ||
331 | state.type = ARCHIVE_TRANSFER_INIT; | |
332 | state.archive_file = NULL; | |
333 | #ifdef HAVE_MMAP | |
334 | state.archive_mmap_fd = 0; | |
335 | state.archive_mmap_data = NULL; | |
336 | #endif | |
337 | state.archive_size = 0; | |
338 | state.context = NULL; | |
339 | state.step_total = 0; | |
340 | state.step_current = 0; | |
341 | state.backend = NULL; | |
342 | ||
343 | for (;;) | |
344 | { | |
345 | if (file_archive_parse_file_iterate(&state, &returnerr, file, | |
346 | valid_exts, file_cb, userdata) != 0) | |
347 | break; | |
348 | } | |
349 | ||
350 | return returnerr; | |
351 | } | |
352 | ||
353 | int file_archive_parse_file_progress(file_archive_transfer_t *state) | |
354 | { | |
355 | if (!state || state->step_total == 0) | |
356 | return 0; | |
357 | ||
358 | return (int)((state->step_current * 100) / (state->step_total)); | |
359 | } | |
360 | ||
361 | /** | |
362 | * file_archive_extract_file: | |
363 | * @archive_path : filename path to archive. | |
364 | * @valid_exts : valid extensions for the file. | |
365 | * @extraction_directory : the directory to extract temporary | |
366 | * file to. | |
367 | * | |
368 | * Extract file from archive. If no file inside the archive is | |
369 | * specified, the first file found will be used. | |
370 | * | |
371 | * Returns : true (1) on success, otherwise false (0). | |
372 | **/ | |
373 | bool file_archive_extract_file( | |
374 | const char *archive_path, | |
375 | const char *valid_exts, | |
376 | const char *extraction_directory, | |
377 | char *out_path, size_t len) | |
378 | { | |
379 | struct archive_extract_userdata userdata; | |
380 | bool ret = true; | |
381 | struct string_list *list = string_split(valid_exts, "|"); | |
382 | ||
383 | userdata.archive_path[0] = '\0'; | |
384 | userdata.current_file_path[0] = '\0'; | |
385 | userdata.first_extracted_file_path = NULL; | |
386 | userdata.extraction_directory = extraction_directory; | |
387 | userdata.ext = list; | |
388 | userdata.list = NULL; | |
389 | userdata.found_file = false; | |
390 | userdata.list_only = false; | |
391 | userdata.crc = 0; | |
392 | userdata.transfer = NULL; | |
393 | userdata.dec = NULL; | |
394 | ||
395 | if (!list) | |
396 | { | |
397 | ret = false; | |
398 | goto end; | |
399 | } | |
400 | ||
401 | if (!file_archive_walk(archive_path, valid_exts, | |
402 | file_archive_extract_cb, &userdata)) | |
403 | { | |
404 | /* Parsing file archive failed. */ | |
405 | ret = false; | |
406 | goto end; | |
407 | } | |
408 | ||
409 | if (!userdata.found_file) | |
410 | { | |
411 | /* Didn't find any file that matched valid extensions | |
412 | * for libretro implementation. */ | |
413 | ret = false; | |
414 | goto end; | |
415 | } | |
416 | ||
417 | if (!string_is_empty(userdata.first_extracted_file_path)) | |
418 | strlcpy(out_path, userdata.first_extracted_file_path, len); | |
419 | ||
420 | end: | |
421 | if (userdata.first_extracted_file_path) | |
422 | free(userdata.first_extracted_file_path); | |
423 | if (list) | |
424 | string_list_free(list); | |
425 | return ret; | |
426 | } | |
427 | ||
428 | /* Warning: 'list' must zero initialised before | |
429 | * calling this function, otherwise memory leaks/ | |
430 | * undefined behaviour will occur */ | |
431 | bool file_archive_get_file_list_noalloc(struct string_list *list, | |
432 | const char *path, | |
433 | const char *valid_exts) | |
434 | { | |
435 | struct archive_extract_userdata userdata; | |
436 | ||
437 | if (!list || !string_list_initialize(list)) | |
438 | return false; | |
439 | ||
440 | strlcpy(userdata.archive_path, path, sizeof(userdata.archive_path)); | |
441 | userdata.current_file_path[0] = '\0'; | |
442 | userdata.first_extracted_file_path = NULL; | |
443 | userdata.extraction_directory = NULL; | |
444 | userdata.ext = NULL; | |
445 | userdata.list = list; | |
446 | userdata.found_file = false; | |
447 | userdata.list_only = true; | |
448 | userdata.crc = 0; | |
449 | userdata.transfer = NULL; | |
450 | userdata.dec = NULL; | |
451 | ||
452 | if (!file_archive_walk(path, valid_exts, | |
453 | file_archive_get_file_list_cb, &userdata)) | |
454 | return false; | |
455 | return true; | |
456 | } | |
457 | ||
458 | /** | |
459 | * file_archive_get_file_list: | |
460 | * @path : filename path of archive | |
461 | * | |
462 | * Returns: string listing of files from archive on success, otherwise NULL. | |
463 | **/ | |
464 | struct string_list *file_archive_get_file_list(const char *path, | |
465 | const char *valid_exts) | |
466 | { | |
467 | struct archive_extract_userdata userdata; | |
468 | ||
469 | strlcpy(userdata.archive_path, path, sizeof(userdata.archive_path)); | |
470 | userdata.current_file_path[0] = '\0'; | |
471 | userdata.first_extracted_file_path = NULL; | |
472 | userdata.extraction_directory = NULL; | |
473 | userdata.ext = NULL; | |
474 | userdata.list = string_list_new(); | |
475 | userdata.found_file = false; | |
476 | userdata.list_only = true; | |
477 | userdata.crc = 0; | |
478 | userdata.transfer = NULL; | |
479 | userdata.dec = NULL; | |
480 | ||
481 | if (!userdata.list) | |
482 | return NULL; | |
483 | if (!file_archive_walk(path, valid_exts, | |
484 | file_archive_get_file_list_cb, &userdata)) | |
485 | { | |
486 | string_list_free(userdata.list); | |
487 | return NULL; | |
488 | } | |
489 | return userdata.list; | |
490 | } | |
491 | ||
492 | bool file_archive_perform_mode(const char *path, const char *valid_exts, | |
493 | const uint8_t *cdata, unsigned cmode, uint32_t csize, uint32_t size, | |
494 | uint32_t crc32, struct archive_extract_userdata *userdata) | |
495 | { | |
496 | file_archive_file_handle_t handle; | |
497 | int ret; | |
498 | ||
499 | if (!userdata->transfer || !userdata->transfer->backend) | |
500 | return false; | |
501 | ||
502 | handle.data = NULL; | |
503 | handle.real_checksum = 0; | |
504 | ||
505 | if (!userdata->transfer->backend->stream_decompress_data_to_file_init( | |
506 | userdata->transfer->context, &handle, cdata, cmode, csize, size)) | |
507 | return false; | |
508 | ||
509 | do | |
510 | { | |
511 | ret = userdata->transfer->backend->stream_decompress_data_to_file_iterate( | |
512 | userdata->transfer->context, &handle); | |
513 | }while (ret == 0); | |
514 | ||
515 | if (ret == -1 || !file_archive_decompress_data_to_file( | |
516 | userdata->transfer, &handle, path, | |
517 | size, crc32)) | |
518 | return false; | |
519 | ||
520 | return true; | |
521 | } | |
522 | ||
523 | /** | |
524 | * file_archive_filename_split: | |
525 | * @str : filename to turn into a string list | |
526 | * | |
527 | * Creates a new string list based on filename @path, delimited by a hash (#). | |
528 | * | |
529 | * Returns: new string list if successful, otherwise NULL. | |
530 | */ | |
531 | static struct string_list *file_archive_filename_split(const char *path) | |
532 | { | |
533 | union string_list_elem_attr attr; | |
534 | struct string_list *list = string_list_new(); | |
535 | const char *delim = path_get_archive_delim(path); | |
536 | ||
537 | attr.i = 0; | |
538 | ||
539 | if (delim) | |
540 | { | |
541 | /* add archive path to list first */ | |
542 | if (!string_list_append_n(list, path, (unsigned)(delim - path), attr)) | |
543 | goto error; | |
544 | ||
545 | /* now add the path within the archive */ | |
546 | delim++; | |
547 | ||
548 | if (*delim) | |
549 | { | |
550 | if (!string_list_append(list, delim, attr)) | |
551 | goto error; | |
552 | } | |
553 | } | |
554 | else | |
555 | if (!string_list_append(list, path, attr)) | |
556 | goto error; | |
557 | ||
558 | return list; | |
559 | ||
560 | error: | |
561 | string_list_free(list); | |
562 | return NULL; | |
563 | } | |
564 | ||
565 | /* Generic compressed file loader. | |
566 | * Extracts to buf, unless optional_filename != 0 | |
567 | * Then extracts to optional_filename and leaves buf alone. | |
568 | */ | |
569 | int file_archive_compressed_read( | |
570 | const char * path, void **buf, | |
571 | const char* optional_filename, int64_t *length) | |
572 | { | |
573 | const struct | |
574 | file_archive_file_backend *backend = NULL; | |
575 | struct string_list *str_list = NULL; | |
576 | ||
577 | /* Safety check. | |
578 | * If optional_filename and optional_filename | |
579 | * exists, we simply return 0, | |
580 | * hoping that optional_filename is the | |
581 | * same as requested. | |
582 | */ | |
583 | if (optional_filename && path_is_valid(optional_filename)) | |
584 | { | |
585 | *length = 0; | |
586 | return 1; | |
587 | } | |
588 | ||
589 | str_list = file_archive_filename_split(path); | |
590 | /* We assure that there is something after the '#' symbol. | |
591 | * | |
592 | * This error condition happens for example, when | |
593 | * path = /path/to/file.7z, or | |
594 | * path = /path/to/file.7z# | |
595 | */ | |
596 | if (str_list->size <= 1) | |
597 | { | |
598 | /* could not extract string and substring. */ | |
599 | string_list_free(str_list); | |
600 | *length = 0; | |
601 | return 0; | |
602 | } | |
603 | ||
604 | backend = file_archive_get_file_backend(str_list->elems[0].data); | |
605 | *length = backend->compressed_file_read(str_list->elems[0].data, | |
606 | str_list->elems[1].data, buf, optional_filename); | |
607 | ||
608 | string_list_free(str_list); | |
609 | ||
610 | if (*length != -1) | |
611 | return 1; | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | const struct file_archive_file_backend *file_archive_get_zlib_file_backend(void) | |
617 | { | |
618 | #ifdef HAVE_ZLIB | |
619 | return &zlib_backend; | |
620 | #else | |
621 | return NULL; | |
622 | #endif | |
623 | } | |
624 | ||
625 | const struct file_archive_file_backend *file_archive_get_7z_file_backend(void) | |
626 | { | |
627 | #ifdef HAVE_7ZIP | |
628 | return &sevenzip_backend; | |
629 | #else | |
630 | return NULL; | |
631 | #endif | |
632 | } | |
633 | ||
634 | const struct file_archive_file_backend* file_archive_get_file_backend(const char *path) | |
635 | { | |
636 | #if defined(HAVE_7ZIP) || defined(HAVE_ZLIB) | |
637 | char newpath[PATH_MAX_LENGTH]; | |
638 | const char *file_ext = NULL; | |
639 | char *last = NULL; | |
640 | ||
641 | strlcpy(newpath, path, sizeof(newpath)); | |
642 | ||
643 | if ((last = (char*)path_get_archive_delim(newpath))) | |
644 | *last = '\0'; | |
645 | ||
646 | file_ext = path_get_extension(newpath); | |
647 | ||
648 | #ifdef HAVE_7ZIP | |
649 | if (string_is_equal_noncase(file_ext, "7z")) | |
650 | return &sevenzip_backend; | |
651 | #endif | |
652 | ||
653 | #ifdef HAVE_ZLIB | |
654 | if ( string_is_equal_noncase(file_ext, "zip") | |
655 | || string_is_equal_noncase(file_ext, "apk") | |
656 | ) | |
657 | return &zlib_backend; | |
658 | #endif | |
659 | #endif | |
660 | ||
661 | return NULL; | |
662 | } | |
663 | ||
664 | /** | |
665 | * file_archive_get_file_crc32: | |
666 | * @path : filename path of archive | |
667 | * | |
668 | * Returns: CRC32 of the specified file in the archive, otherwise 0. | |
669 | * If no path within the archive is specified, the first | |
670 | * file found inside is used. | |
671 | **/ | |
672 | uint32_t file_archive_get_file_crc32(const char *path) | |
673 | { | |
674 | file_archive_transfer_t state; | |
675 | struct archive_extract_userdata userdata = {0}; | |
676 | bool returnerr = false; | |
677 | const char *archive_path = NULL; | |
678 | bool contains_compressed = path_contains_compressed_file(path); | |
679 | ||
680 | if (contains_compressed) | |
681 | { | |
682 | archive_path = path_get_archive_delim(path); | |
683 | ||
684 | /* move pointer right after the delimiter to give us the path */ | |
685 | if (archive_path) | |
686 | archive_path += 1; | |
687 | } | |
688 | ||
689 | state.type = ARCHIVE_TRANSFER_INIT; | |
690 | state.archive_file = NULL; | |
691 | #ifdef HAVE_MMAP | |
692 | state.archive_mmap_fd = 0; | |
693 | state.archive_mmap_data = NULL; | |
694 | #endif | |
695 | state.archive_size = 0; | |
696 | state.context = NULL; | |
697 | state.step_total = 0; | |
698 | state.step_current = 0; | |
699 | state.backend = NULL; | |
700 | ||
701 | /* Initialize and open archive first. | |
702 | Sets next state type to ITERATE. */ | |
703 | file_archive_parse_file_iterate(&state, | |
704 | &returnerr, path, NULL, NULL, | |
705 | &userdata); | |
706 | ||
707 | for (;;) | |
708 | { | |
709 | /* Now find the first file in the archive. */ | |
710 | if (state.type == ARCHIVE_TRANSFER_ITERATE) | |
711 | file_archive_parse_file_iterate(&state, | |
712 | &returnerr, path, NULL, NULL, | |
713 | &userdata); | |
714 | ||
715 | /* If no path specified within archive, stop after | |
716 | * finding the first file. | |
717 | */ | |
718 | if (!contains_compressed) | |
719 | break; | |
720 | ||
721 | /* Stop when the right file in the archive is found. */ | |
722 | if (archive_path) | |
723 | { | |
724 | if (string_is_equal(userdata.current_file_path, archive_path)) | |
725 | break; | |
726 | } | |
727 | else | |
728 | break; | |
729 | } | |
730 | ||
731 | file_archive_parse_file_iterate_stop(&state); | |
732 | ||
733 | return userdata.crc; | |
734 | } |