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ef416fc2 | 1 | /* |
b19ccc9e | 2 | * "$Id: type.c 7720 2008-07-11 22:46:21Z mike $" |
ef416fc2 | 3 | * |
4 | * MIME typing routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
c168a833 | 6 | * Copyright 2007-2009 by Apple Inc. |
fa73b229 | 7 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 10 | * property of Apple Inc. and are protected by Federal copyright |
11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" | |
12 | * which should have been included with this file. If this file is | |
13 | * file is missing or damaged, see the license at "http://www.cups.org/". | |
ef416fc2 | 14 | * |
15 | * Contents: | |
16 | * | |
17 | * mimeAddType() - Add a MIME type to a database. | |
18 | * mimeAddTypeRule() - Add a detection rule for a file type. | |
19 | * mimeFileType() - Determine the type of a file. | |
20 | * mimeType() - Lookup a file type. | |
fa73b229 | 21 | * compare_types() - Compare two MIME super/type names. |
ef416fc2 | 22 | * checkrules() - Check each rule in a list. |
23 | * patmatch() - Pattern matching... | |
24 | */ | |
25 | ||
26 | /* | |
27 | * Include necessary headers... | |
28 | */ | |
29 | ||
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <ctype.h> | |
33 | #include <locale.h> | |
34 | ||
35 | #include <cups/string.h> | |
36 | #include "mime.h" | |
37 | #include <cups/debug.h> | |
38 | ||
39 | ||
4400e98d | 40 | /* |
41 | * Local types... | |
42 | */ | |
43 | ||
44 | typedef struct _mime_filebuf_s /**** File buffer for MIME typing ****/ | |
45 | { | |
46 | cups_file_t *fp; /* File pointer */ | |
47 | int offset, /* Offset in file */ | |
48 | length; /* Length of buffered data */ | |
49 | unsigned char buffer[MIME_MAX_BUFFER];/* Buffered data */ | |
50 | } _mime_filebuf_t; | |
51 | ||
52 | ||
ef416fc2 | 53 | /* |
54 | * Local functions... | |
55 | */ | |
56 | ||
fa73b229 | 57 | static int compare_types(mime_type_t *t0, mime_type_t *t1); |
4400e98d | 58 | static int checkrules(const char *filename, _mime_filebuf_t *fb, |
59 | mime_magic_t *rules); | |
60 | static int patmatch(const char *s, const char *pat); | |
ef416fc2 | 61 | |
62 | ||
63 | /* | |
64 | * 'mimeAddType()' - Add a MIME type to a database. | |
65 | */ | |
66 | ||
fa73b229 | 67 | mime_type_t * /* O - New (or existing) MIME type */ |
68 | mimeAddType(mime_t *mime, /* I - MIME database */ | |
69 | const char *super, /* I - Super-type name */ | |
70 | const char *type) /* I - Type name */ | |
ef416fc2 | 71 | { |
fa73b229 | 72 | mime_type_t *temp; /* New MIME type */ |
ef416fc2 | 73 | |
74 | ||
75 | /* | |
76 | * Range check input... | |
77 | */ | |
78 | ||
fa73b229 | 79 | if (!mime || !super || !type) |
ef416fc2 | 80 | return (NULL); |
81 | ||
82 | /* | |
83 | * See if the type already exists; if so, return the existing type... | |
84 | */ | |
85 | ||
86 | if ((temp = mimeType(mime, super, type)) != NULL) | |
87 | return (temp); | |
88 | ||
89 | /* | |
90 | * The type doesn't exist; add it... | |
91 | */ | |
92 | ||
fa73b229 | 93 | if (!mime->types) |
94 | mime->types = cupsArrayNew((cups_array_func_t)compare_types, NULL); | |
ef416fc2 | 95 | |
fa73b229 | 96 | if (!mime->types) |
ef416fc2 | 97 | return (NULL); |
ef416fc2 | 98 | |
fa73b229 | 99 | if ((temp = calloc(1, sizeof(mime_type_t) - MIME_MAX_TYPE + |
100 | strlen(type) + 1)) == NULL) | |
101 | return (NULL); | |
ef416fc2 | 102 | |
ef416fc2 | 103 | strlcpy(temp->super, super, sizeof(temp->super)); |
fa73b229 | 104 | strcpy(temp->type, type); /* Safe: temp->type is allocated */ |
dd1abb6b | 105 | temp->priority = 100; |
ef416fc2 | 106 | |
fa73b229 | 107 | cupsArrayAdd(mime->types, temp); |
ef416fc2 | 108 | |
109 | return (temp); | |
110 | } | |
111 | ||
112 | ||
113 | /* | |
114 | * 'mimeAddTypeRule()' - Add a detection rule for a file type. | |
115 | */ | |
116 | ||
117 | int /* O - 0 on success, -1 on failure */ | |
118 | mimeAddTypeRule(mime_type_t *mt, /* I - Type to add to */ | |
119 | const char *rule) /* I - Rule to add */ | |
120 | { | |
121 | int num_values, /* Number of values seen */ | |
122 | op, /* Operation code */ | |
123 | logic, /* Logic for next rule */ | |
124 | invert; /* Invert following rule? */ | |
125 | char name[255], /* Name in rule string */ | |
126 | value[3][255], /* Value in rule string */ | |
127 | *ptr, /* Position in name or value */ | |
128 | quote; /* Quote character */ | |
129 | int length[3]; /* Length of each parameter */ | |
130 | mime_magic_t *temp, /* New rule */ | |
131 | *current; /* Current rule */ | |
132 | ||
133 | ||
134 | /* | |
135 | * Range check input... | |
136 | */ | |
137 | ||
fa73b229 | 138 | if (!mt || !rule) |
ef416fc2 | 139 | return (-1); |
140 | ||
141 | /* | |
142 | * Find the last rule in the top-level of the rules tree. | |
143 | */ | |
144 | ||
fa73b229 | 145 | for (current = mt->rules; current; current = current->next) |
146 | if (!current->next) | |
ef416fc2 | 147 | break; |
148 | ||
149 | /* | |
150 | * Parse the rules string. Most rules are either a file extension or a | |
151 | * comparison function: | |
152 | * | |
153 | * extension | |
154 | * function(parameters) | |
155 | */ | |
156 | ||
157 | logic = MIME_MAGIC_NOP; | |
158 | invert = 0; | |
159 | ||
75bd9771 | 160 | DEBUG_printf(("mimeAddTypeRule: %s/%s: %s\n", mt->super, mt->type, rule)); |
ef416fc2 | 161 | |
162 | while (*rule != '\0') | |
163 | { | |
164 | while (isspace(*rule & 255)) | |
165 | rule ++; | |
166 | ||
167 | if (*rule == '(') | |
168 | { | |
75bd9771 | 169 | DEBUG_puts("mimeAddTypeRule: New parenthesis group"); |
ef416fc2 | 170 | logic = MIME_MAGIC_NOP; |
171 | rule ++; | |
172 | } | |
173 | else if (*rule == ')') | |
174 | { | |
75bd9771 | 175 | DEBUG_puts("mimeAddTypeRule: Close paren..."); |
ef416fc2 | 176 | if (current == NULL || current->parent == NULL) |
177 | return (-1); | |
178 | ||
179 | current = current->parent; | |
180 | ||
181 | if (current->parent == NULL) | |
182 | logic = MIME_MAGIC_OR; | |
183 | else | |
184 | logic = current->parent->op; | |
185 | ||
186 | rule ++; | |
187 | } | |
188 | else if (*rule == '+' && current != NULL) | |
189 | { | |
190 | if (logic != MIME_MAGIC_AND && | |
d2354e63 | 191 | current != NULL && current->prev != NULL) |
ef416fc2 | 192 | { |
193 | /* | |
194 | * OK, we have more than 1 rule in the current tree level... Make a | |
195 | * new group tree and move the previous rule to it... | |
196 | */ | |
197 | ||
198 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
199 | return (-1); | |
200 | ||
201 | temp->op = MIME_MAGIC_AND; | |
202 | temp->child = current; | |
203 | temp->parent = current->parent; | |
204 | current->prev->next = temp; | |
205 | temp->prev = current->prev; | |
206 | ||
207 | current->prev = NULL; | |
208 | current->parent = temp; | |
209 | ||
75bd9771 | 210 | DEBUG_printf(("mimeAddTypeRule: Creating new AND group %p...\n", temp)); |
ef416fc2 | 211 | } |
212 | else | |
213 | { | |
75bd9771 MS |
214 | DEBUG_printf(("mimeAddTypeRule: Setting group %p op to AND...\n", |
215 | current->parent)); | |
ef416fc2 | 216 | current->parent->op = MIME_MAGIC_AND; |
217 | } | |
218 | ||
219 | logic = MIME_MAGIC_AND; | |
220 | rule ++; | |
221 | } | |
222 | else if (*rule == ',') | |
223 | { | |
224 | if (logic != MIME_MAGIC_OR && current != NULL) | |
225 | { | |
226 | /* | |
227 | * OK, we have two possibilities; either this is the top-level rule or | |
228 | * we have a bunch of AND rules at this level. | |
229 | */ | |
230 | ||
231 | if (current->parent == NULL) | |
232 | { | |
233 | /* | |
234 | * This is the top-level rule; we have to move *all* of the AND rules | |
235 | * down a level, as AND has precedence over OR. | |
236 | */ | |
237 | ||
238 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
239 | return (-1); | |
240 | ||
75bd9771 MS |
241 | DEBUG_printf(("mimeAddTypeRule: Creating new AND group %p inside OR " |
242 | "group\n", temp)); | |
ef416fc2 | 243 | |
244 | while (current->prev != NULL) | |
245 | { | |
246 | current->parent = temp; | |
247 | current = current->prev; | |
248 | } | |
249 | ||
250 | current->parent = temp; | |
251 | temp->op = MIME_MAGIC_AND; | |
252 | temp->child = current; | |
253 | ||
254 | mt->rules = current = temp; | |
255 | } | |
256 | else | |
257 | { | |
258 | /* | |
259 | * This isn't the top rule, so go up one level... | |
260 | */ | |
261 | ||
75bd9771 | 262 | DEBUG_puts("mimeAddTypeRule: Going up one level"); |
ef416fc2 | 263 | current = current->parent; |
264 | } | |
265 | } | |
266 | ||
267 | logic = MIME_MAGIC_OR; | |
268 | rule ++; | |
269 | } | |
270 | else if (*rule == '!') | |
271 | { | |
75bd9771 | 272 | DEBUG_puts("mimeAddTypeRule: NOT"); |
ef416fc2 | 273 | invert = 1; |
274 | rule ++; | |
275 | } | |
276 | else if (isalnum(*rule & 255)) | |
277 | { | |
278 | /* | |
279 | * Read an extension name or a function... | |
280 | */ | |
281 | ||
4400e98d | 282 | ptr = name; |
283 | while (isalnum(*rule & 255) && (ptr - name) < (sizeof(name) - 1)) | |
ef416fc2 | 284 | *ptr++ = *rule++; |
285 | ||
1f0275e3 | 286 | *ptr = '\0'; |
ef416fc2 | 287 | |
288 | if (*rule == '(') | |
289 | { | |
290 | /* | |
291 | * Read function parameters... | |
292 | */ | |
293 | ||
294 | rule ++; | |
295 | for (num_values = 0; | |
296 | num_values < (sizeof(value) / sizeof(value[0])); | |
297 | num_values ++) | |
298 | { | |
299 | ptr = value[num_values]; | |
300 | ||
301 | while ((ptr - value[num_values]) < (sizeof(value[0]) - 1) && | |
302 | *rule != '\0' && *rule != ',' && *rule != ')') | |
303 | { | |
304 | if (isspace(*rule & 255)) | |
305 | { | |
306 | /* | |
307 | * Ignore whitespace... | |
308 | */ | |
309 | ||
310 | rule ++; | |
311 | continue; | |
312 | } | |
313 | else if (*rule == '\"' || *rule == '\'') | |
314 | { | |
315 | /* | |
316 | * Copy quoted strings literally... | |
317 | */ | |
318 | ||
319 | quote = *rule++; | |
320 | ||
321 | while (*rule != '\0' && *rule != quote && | |
322 | (ptr - value[num_values]) < (sizeof(value[0]) - 1)) | |
323 | *ptr++ = *rule++; | |
324 | ||
325 | if (*rule == quote) | |
326 | rule ++; | |
327 | else | |
328 | return (-1); | |
329 | } | |
330 | else if (*rule == '<') | |
331 | { | |
332 | rule ++; | |
333 | ||
334 | while (*rule != '>' && *rule != '\0' && | |
335 | (ptr - value[num_values]) < (sizeof(value[0]) - 1)) | |
336 | { | |
337 | if (isxdigit(rule[0] & 255) && isxdigit(rule[1] & 255)) | |
338 | { | |
339 | if (isdigit(*rule)) | |
340 | *ptr = (*rule++ - '0') << 4; | |
341 | else | |
342 | *ptr = (tolower(*rule++) - 'a' + 10) << 4; | |
343 | ||
344 | if (isdigit(*rule)) | |
345 | *ptr++ |= *rule++ - '0'; | |
346 | else | |
347 | *ptr++ |= tolower(*rule++) - 'a' + 10; | |
348 | } | |
349 | else | |
350 | return (-1); | |
351 | } | |
352 | ||
353 | if (*rule == '>') | |
354 | rule ++; | |
355 | else | |
356 | return (-1); | |
357 | } | |
358 | else | |
359 | *ptr++ = *rule++; | |
360 | } | |
361 | ||
362 | *ptr = '\0'; | |
363 | length[num_values] = ptr - value[num_values]; | |
364 | ||
365 | if (*rule != ',') | |
c168a833 MS |
366 | { |
367 | num_values ++; | |
ef416fc2 | 368 | break; |
c168a833 | 369 | } |
ef416fc2 | 370 | |
371 | rule ++; | |
372 | } | |
373 | ||
374 | if (*rule != ')') | |
375 | return (-1); | |
376 | ||
377 | rule ++; | |
378 | ||
379 | /* | |
380 | * Figure out the function... | |
381 | */ | |
382 | ||
fa73b229 | 383 | if (!strcmp(name, "match")) |
ef416fc2 | 384 | op = MIME_MAGIC_MATCH; |
fa73b229 | 385 | else if (!strcmp(name, "ascii")) |
ef416fc2 | 386 | op = MIME_MAGIC_ASCII; |
fa73b229 | 387 | else if (!strcmp(name, "printable")) |
ef416fc2 | 388 | op = MIME_MAGIC_PRINTABLE; |
fa73b229 | 389 | else if (!strcmp(name, "string")) |
ef416fc2 | 390 | op = MIME_MAGIC_STRING; |
fa73b229 | 391 | else if (!strcmp(name, "istring")) |
ef416fc2 | 392 | op = MIME_MAGIC_ISTRING; |
fa73b229 | 393 | else if (!strcmp(name, "char")) |
ef416fc2 | 394 | op = MIME_MAGIC_CHAR; |
fa73b229 | 395 | else if (!strcmp(name, "short")) |
ef416fc2 | 396 | op = MIME_MAGIC_SHORT; |
fa73b229 | 397 | else if (!strcmp(name, "int")) |
ef416fc2 | 398 | op = MIME_MAGIC_INT; |
fa73b229 | 399 | else if (!strcmp(name, "locale")) |
ef416fc2 | 400 | op = MIME_MAGIC_LOCALE; |
fa73b229 | 401 | else if (!strcmp(name, "contains")) |
ef416fc2 | 402 | op = MIME_MAGIC_CONTAINS; |
dd1abb6b MS |
403 | else if (!strcmp(name, "priority") && num_values == 1) |
404 | { | |
405 | mt->priority = atoi(value[0]); | |
406 | continue; | |
407 | } | |
ef416fc2 | 408 | else |
409 | return (-1); | |
410 | } | |
411 | else | |
412 | { | |
413 | /* | |
414 | * This is just a filename match on the extension... | |
415 | */ | |
416 | ||
417 | snprintf(value[0], sizeof(value[0]), "*.%s", name); | |
418 | length[0] = strlen(value[0]); | |
ef416fc2 | 419 | op = MIME_MAGIC_MATCH; |
420 | } | |
421 | ||
422 | /* | |
423 | * Add a rule for this operation. | |
424 | */ | |
425 | ||
426 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
427 | return (-1); | |
428 | ||
429 | temp->invert = invert; | |
430 | if (current != NULL) | |
431 | { | |
432 | temp->parent = current->parent; | |
433 | current->next = temp; | |
434 | } | |
435 | else | |
436 | mt->rules = temp; | |
437 | ||
438 | temp->prev = current; | |
439 | ||
440 | if (logic == MIME_MAGIC_NOP) | |
441 | { | |
442 | /* | |
443 | * Add parenthetical grouping... | |
444 | */ | |
445 | ||
75bd9771 MS |
446 | DEBUG_printf(("mimeAddTypeRule: Making new OR group %p for " |
447 | "parenthesis...\n", temp)); | |
ef416fc2 | 448 | |
449 | temp->op = MIME_MAGIC_OR; | |
450 | ||
451 | if ((temp->child = calloc(1, sizeof(mime_magic_t))) == NULL) | |
452 | return (-1); | |
453 | ||
454 | temp->child->parent = temp; | |
455 | ||
456 | temp = temp->child; | |
457 | logic = MIME_MAGIC_OR; | |
458 | } | |
459 | ||
75bd9771 MS |
460 | DEBUG_printf(("mimeAddTypeRule: adding %p: %s, op=%d, logic=%d, " |
461 | "invert=%d\n", temp, name, op, logic, invert)); | |
ef416fc2 | 462 | |
463 | /* | |
464 | * Fill in data for the rule... | |
465 | */ | |
466 | ||
467 | current = temp; | |
468 | temp->op = op; | |
469 | invert = 0; | |
470 | ||
471 | switch (op) | |
472 | { | |
473 | case MIME_MAGIC_MATCH : | |
474 | if (length[0] > (sizeof(temp->value.matchv) - 1)) | |
475 | return (-1); | |
476 | strcpy(temp->value.matchv, value[0]); | |
477 | break; | |
478 | case MIME_MAGIC_ASCII : | |
479 | case MIME_MAGIC_PRINTABLE : | |
480 | temp->offset = strtol(value[0], NULL, 0); | |
481 | temp->length = strtol(value[1], NULL, 0); | |
482 | if (temp->length > MIME_MAX_BUFFER) | |
483 | temp->length = MIME_MAX_BUFFER; | |
484 | break; | |
485 | case MIME_MAGIC_STRING : | |
486 | case MIME_MAGIC_ISTRING : | |
487 | temp->offset = strtol(value[0], NULL, 0); | |
488 | if (length[1] > sizeof(temp->value.stringv)) | |
489 | return (-1); | |
490 | temp->length = length[1]; | |
491 | memcpy(temp->value.stringv, value[1], length[1]); | |
492 | break; | |
493 | case MIME_MAGIC_CHAR : | |
494 | temp->offset = strtol(value[0], NULL, 0); | |
495 | if (length[1] == 1) | |
496 | temp->value.charv = value[1][0]; | |
497 | else | |
498 | temp->value.charv = (char)strtol(value[1], NULL, 0); | |
499 | break; | |
500 | case MIME_MAGIC_SHORT : | |
501 | temp->offset = strtol(value[0], NULL, 0); | |
502 | temp->value.shortv = (short)strtol(value[1], NULL, 0); | |
503 | break; | |
504 | case MIME_MAGIC_INT : | |
505 | temp->offset = strtol(value[0], NULL, 0); | |
506 | temp->value.intv = (int)strtol(value[1], NULL, 0); | |
507 | break; | |
508 | case MIME_MAGIC_LOCALE : | |
509 | if (length[0] > (sizeof(temp->value.localev) - 1)) | |
510 | return (-1); | |
511 | ||
512 | strcpy(temp->value.localev, value[0]); | |
513 | break; | |
514 | case MIME_MAGIC_CONTAINS : | |
515 | temp->offset = strtol(value[0], NULL, 0); | |
516 | temp->region = strtol(value[1], NULL, 0); | |
517 | if (length[2] > sizeof(temp->value.stringv)) | |
518 | return (-1); | |
519 | temp->length = length[2]; | |
520 | memcpy(temp->value.stringv, value[2], length[2]); | |
521 | break; | |
522 | } | |
523 | } | |
524 | else | |
525 | break; | |
526 | } | |
527 | ||
528 | return (0); | |
529 | } | |
530 | ||
531 | ||
532 | /* | |
533 | * 'mimeFileType()' - Determine the type of a file. | |
534 | */ | |
535 | ||
536 | mime_type_t * /* O - Type of file */ | |
537 | mimeFileType(mime_t *mime, /* I - MIME database */ | |
4400e98d | 538 | const char *pathname, /* I - Name of file to check on disk */ |
539 | const char *filename, /* I - Original filename or NULL */ | |
ef416fc2 | 540 | int *compression) /* O - Is the file compressed? */ |
541 | { | |
4400e98d | 542 | _mime_filebuf_t fb; /* File buffer */ |
543 | const char *base; /* Base filename of file */ | |
dd1abb6b MS |
544 | mime_type_t *type, /* File type */ |
545 | *best; /* Best match */ | |
ef416fc2 | 546 | |
547 | ||
b423cd4c | 548 | DEBUG_printf(("mimeFileType(mime=%p, pathname=\"%s\", filename=\"%s\", " |
75bd9771 | 549 | "compression=%p)\n", mime, pathname, filename, compression)); |
ef416fc2 | 550 | |
551 | /* | |
552 | * Range check input parameters... | |
553 | */ | |
554 | ||
fa73b229 | 555 | if (!mime || !pathname) |
ef416fc2 | 556 | return (NULL); |
557 | ||
558 | /* | |
559 | * Try to open the file... | |
560 | */ | |
561 | ||
4400e98d | 562 | if ((fb.fp = cupsFileOpen(pathname, "r")) == NULL) |
ef416fc2 | 563 | return (NULL); |
564 | ||
4400e98d | 565 | fb.offset = -1; |
566 | fb.length = 0; | |
567 | ||
ef416fc2 | 568 | /* |
4400e98d | 569 | * Figure out the base filename (without directory portion)... |
ef416fc2 | 570 | */ |
571 | ||
4400e98d | 572 | if (filename) |
573 | { | |
574 | if ((base = strrchr(filename, '/')) != NULL) | |
575 | base ++; | |
576 | else | |
91c84a35 | 577 | base = filename; |
4400e98d | 578 | } |
579 | else if ((base = strrchr(pathname, '/')) != NULL) | |
580 | base ++; | |
ef416fc2 | 581 | else |
91c84a35 | 582 | base = pathname; |
ef416fc2 | 583 | |
584 | /* | |
585 | * Then check it against all known types... | |
586 | */ | |
587 | ||
dd1abb6b | 588 | for (type = (mime_type_t *)cupsArrayFirst(mime->types), best = NULL; |
fa73b229 | 589 | type; |
590 | type = (mime_type_t *)cupsArrayNext(mime->types)) | |
4400e98d | 591 | if (checkrules(base, &fb, type->rules)) |
dd1abb6b MS |
592 | { |
593 | if (!best || type->priority > best->priority) | |
594 | best = type; | |
595 | } | |
ef416fc2 | 596 | |
597 | /* | |
598 | * Finally, close the file and return a match (if any)... | |
599 | */ | |
600 | ||
601 | if (compression) | |
4400e98d | 602 | *compression = cupsFileCompression(fb.fp); |
ef416fc2 | 603 | |
4400e98d | 604 | cupsFileClose(fb.fp); |
ef416fc2 | 605 | |
dd1abb6b | 606 | return (best); |
ef416fc2 | 607 | } |
608 | ||
609 | ||
610 | /* | |
611 | * 'mimeType()' - Lookup a file type. | |
612 | */ | |
613 | ||
fa73b229 | 614 | mime_type_t * /* O - Matching file type definition */ |
615 | mimeType(mime_t *mime, /* I - MIME database */ | |
616 | const char *super, /* I - Super-type name */ | |
617 | const char *type) /* I - Type name */ | |
ef416fc2 | 618 | { |
fa73b229 | 619 | mime_type_t key; /* MIME type search key*/ |
620 | ||
ef416fc2 | 621 | |
622 | /* | |
623 | * Range check input... | |
624 | */ | |
625 | ||
fa73b229 | 626 | if (!mime || !super || !type) |
ef416fc2 | 627 | return (NULL); |
628 | ||
629 | /* | |
630 | * Lookup the type in the array... | |
631 | */ | |
632 | ||
633 | strlcpy(key.super, super, sizeof(key.super)); | |
fa73b229 | 634 | strlcpy(key.type, type, sizeof(key.type)); |
ef416fc2 | 635 | |
fa73b229 | 636 | return ((mime_type_t *)cupsArrayFind(mime->types, &key)); |
ef416fc2 | 637 | } |
638 | ||
639 | ||
640 | /* | |
fa73b229 | 641 | * 'compare_types()' - Compare two MIME super/type names. |
ef416fc2 | 642 | */ |
643 | ||
fa73b229 | 644 | static int /* O - Result of comparison */ |
645 | compare_types(mime_type_t *t0, /* I - First type */ | |
646 | mime_type_t *t1) /* I - Second type */ | |
ef416fc2 | 647 | { |
fa73b229 | 648 | int i; /* Result of comparison */ |
ef416fc2 | 649 | |
650 | ||
080811b1 MS |
651 | if ((i = strcasecmp(t0->super, t1->super)) == 0) |
652 | i = strcasecmp(t0->type, t1->type); | |
ef416fc2 | 653 | |
654 | return (i); | |
655 | } | |
656 | ||
657 | ||
658 | /* | |
659 | * 'checkrules()' - Check each rule in a list. | |
660 | */ | |
661 | ||
662 | static int /* O - 1 if match, 0 if no match */ | |
4400e98d | 663 | checkrules(const char *filename, /* I - Filename */ |
664 | _mime_filebuf_t *fb, /* I - File to check */ | |
665 | mime_magic_t *rules) /* I - Rules to check */ | |
ef416fc2 | 666 | { |
667 | int n; /* Looping var */ | |
668 | int region; /* Region to look at */ | |
669 | int logic, /* Logic to apply */ | |
670 | result, /* Result of test */ | |
671 | intv; /* Integer value */ | |
672 | short shortv; /* Short value */ | |
4400e98d | 673 | unsigned char *bufptr; /* Pointer into buffer */ |
ef416fc2 | 674 | #ifdef DEBUG |
675 | const char * const debug_tests[] = /* Test names... */ | |
676 | { | |
677 | "NOP", /* No operation */ | |
678 | "AND", /* Logical AND of all children */ | |
679 | "OR", /* Logical OR of all children */ | |
680 | "MATCH", /* Filename match */ | |
681 | "ASCII", /* ASCII characters in range */ | |
4400e98d | 682 | "PRINTABLE", /* Printable characters (32-255) */ |
ef416fc2 | 683 | "STRING", /* String matches */ |
684 | "CHAR", /* Character/byte matches */ | |
685 | "SHORT", /* Short/16-bit word matches */ | |
686 | "INT", /* Integer/32-bit word matches */ | |
687 | "LOCALE" /* Current locale matches string */ | |
688 | "CONTAINS" /* File contains a string */ | |
689 | "ISTRING" /* Case-insensitive string matches */ | |
690 | }; | |
691 | #endif /* DEBUG */ | |
692 | ||
693 | ||
b423cd4c | 694 | DEBUG_printf(("checkrules(filename=\"%s\", fb=%p, rules=%p)\n", filename, |
695 | fb, rules)); | |
ef416fc2 | 696 | |
697 | if (rules == NULL) | |
698 | return (0); | |
699 | ||
700 | if (rules->parent == NULL) | |
701 | logic = MIME_MAGIC_OR; | |
702 | else | |
703 | logic = rules->parent->op; | |
704 | ||
4400e98d | 705 | result = 0; |
ef416fc2 | 706 | |
707 | while (rules != NULL) | |
708 | { | |
709 | /* | |
710 | * Compute the result of this rule... | |
711 | */ | |
712 | ||
713 | switch (rules->op) | |
714 | { | |
715 | case MIME_MAGIC_MATCH : | |
716 | result = patmatch(filename, rules->value.matchv); | |
717 | break; | |
718 | ||
719 | case MIME_MAGIC_ASCII : | |
720 | /* | |
721 | * Load the buffer if necessary... | |
722 | */ | |
723 | ||
4400e98d | 724 | if (fb->offset < 0 || rules->offset < fb->offset || |
725 | (rules->offset + rules->length) > (fb->offset + fb->length)) | |
ef416fc2 | 726 | { |
727 | /* | |
728 | * Reload file buffer... | |
729 | */ | |
730 | ||
4400e98d | 731 | cupsFileSeek(fb->fp, rules->offset); |
732 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
733 | sizeof(fb->buffer)); | |
734 | fb->offset = rules->offset; | |
ef416fc2 | 735 | } |
736 | ||
737 | /* | |
738 | * Test for ASCII printable characters plus standard control chars. | |
739 | */ | |
740 | ||
4400e98d | 741 | if ((rules->offset + rules->length) > (fb->offset + fb->length)) |
742 | n = fb->offset + fb->length - rules->offset; | |
ef416fc2 | 743 | else |
744 | n = rules->length; | |
745 | ||
4400e98d | 746 | bufptr = fb->buffer + rules->offset - fb->offset; |
ef416fc2 | 747 | while (n > 0) |
748 | if ((*bufptr >= 32 && *bufptr <= 126) || | |
749 | (*bufptr >= 8 && *bufptr <= 13) || | |
750 | *bufptr == 26 || *bufptr == 27) | |
751 | { | |
752 | n --; | |
753 | bufptr ++; | |
754 | } | |
755 | else | |
756 | break; | |
757 | ||
758 | result = (n == 0); | |
759 | break; | |
760 | ||
761 | case MIME_MAGIC_PRINTABLE : | |
762 | /* | |
763 | * Load the buffer if necessary... | |
764 | */ | |
765 | ||
4400e98d | 766 | if (fb->offset < 0 || rules->offset < fb->offset || |
767 | (rules->offset + rules->length) > (fb->offset + fb->length)) | |
ef416fc2 | 768 | { |
769 | /* | |
770 | * Reload file buffer... | |
771 | */ | |
772 | ||
4400e98d | 773 | cupsFileSeek(fb->fp, rules->offset); |
774 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
775 | sizeof(fb->buffer)); | |
776 | fb->offset = rules->offset; | |
ef416fc2 | 777 | } |
778 | ||
779 | /* | |
780 | * Test for 8-bit printable characters plus standard control chars. | |
781 | */ | |
782 | ||
4400e98d | 783 | if ((rules->offset + rules->length) > (fb->offset + fb->length)) |
784 | n = fb->offset + fb->length - rules->offset; | |
ef416fc2 | 785 | else |
786 | n = rules->length; | |
787 | ||
4400e98d | 788 | bufptr = fb->buffer + rules->offset - fb->offset; |
ef416fc2 | 789 | |
790 | while (n > 0) | |
791 | if (*bufptr >= 128 || | |
792 | (*bufptr >= 32 && *bufptr <= 126) || | |
793 | (*bufptr >= 8 && *bufptr <= 13) || | |
794 | *bufptr == 26 || *bufptr == 27) | |
795 | { | |
796 | n --; | |
797 | bufptr ++; | |
798 | } | |
799 | else | |
800 | break; | |
801 | ||
802 | result = (n == 0); | |
803 | break; | |
804 | ||
805 | case MIME_MAGIC_STRING : | |
75bd9771 | 806 | DEBUG_printf(("checkrules: string(%d, \"%s\")\n", rules->offset, |
ef416fc2 | 807 | rules->value.stringv)); |
808 | ||
809 | /* | |
810 | * Load the buffer if necessary... | |
811 | */ | |
812 | ||
4400e98d | 813 | if (fb->offset < 0 || rules->offset < fb->offset || |
814 | (rules->offset + rules->length) > (fb->offset + fb->length)) | |
ef416fc2 | 815 | { |
816 | /* | |
817 | * Reload file buffer... | |
818 | */ | |
819 | ||
4400e98d | 820 | cupsFileSeek(fb->fp, rules->offset); |
821 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
822 | sizeof(fb->buffer)); | |
823 | fb->offset = rules->offset; | |
ef416fc2 | 824 | |
75bd9771 | 825 | DEBUG_printf(("checkrules: loaded %d byte fb->buffer at %d, starts " |
4400e98d | 826 | "with \"%c%c%c%c\"...\n", |
827 | fb->length, fb->offset, fb->buffer[0], fb->buffer[1], | |
828 | fb->buffer[2], fb->buffer[3])); | |
ef416fc2 | 829 | } |
830 | ||
831 | /* | |
832 | * Compare the buffer against the string. If the file is too | |
833 | * short then don't compare - it can't match... | |
834 | */ | |
835 | ||
4400e98d | 836 | if ((rules->offset + rules->length) > (fb->offset + fb->length)) |
ef416fc2 | 837 | result = 0; |
838 | else | |
4400e98d | 839 | result = (memcmp(fb->buffer + rules->offset - fb->offset, |
ef416fc2 | 840 | rules->value.stringv, rules->length) == 0); |
75bd9771 | 841 | DEBUG_printf(("checkrules: result=%d\n", result)); |
ef416fc2 | 842 | break; |
843 | ||
844 | case MIME_MAGIC_ISTRING : | |
845 | /* | |
846 | * Load the buffer if necessary... | |
847 | */ | |
848 | ||
4400e98d | 849 | if (fb->offset < 0 || rules->offset < fb->offset || |
850 | (rules->offset + rules->length) > (fb->offset + fb->length)) | |
ef416fc2 | 851 | { |
852 | /* | |
853 | * Reload file buffer... | |
854 | */ | |
855 | ||
4400e98d | 856 | cupsFileSeek(fb->fp, rules->offset); |
857 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
858 | sizeof(fb->buffer)); | |
859 | fb->offset = rules->offset; | |
ef416fc2 | 860 | } |
861 | ||
862 | /* | |
863 | * Compare the buffer against the string. If the file is too | |
864 | * short then don't compare - it can't match... | |
865 | */ | |
866 | ||
4400e98d | 867 | if ((rules->offset + rules->length) > (fb->offset + fb->length)) |
ef416fc2 | 868 | result = 0; |
869 | else | |
4400e98d | 870 | result = (strncasecmp((char *)fb->buffer + rules->offset - |
871 | fb->offset, | |
ef416fc2 | 872 | rules->value.stringv, rules->length) == 0); |
873 | break; | |
874 | ||
875 | case MIME_MAGIC_CHAR : | |
876 | /* | |
877 | * Load the buffer if necessary... | |
878 | */ | |
879 | ||
4400e98d | 880 | if (fb->offset < 0 || rules->offset < fb->offset) |
ef416fc2 | 881 | { |
882 | /* | |
883 | * Reload file buffer... | |
884 | */ | |
885 | ||
4400e98d | 886 | cupsFileSeek(fb->fp, rules->offset); |
887 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
888 | sizeof(fb->buffer)); | |
889 | fb->offset = rules->offset; | |
ef416fc2 | 890 | } |
891 | ||
892 | /* | |
893 | * Compare the character values; if the file is too short, it | |
894 | * can't match... | |
895 | */ | |
896 | ||
4400e98d | 897 | if (fb->length < 1) |
ef416fc2 | 898 | result = 0; |
899 | else | |
4400e98d | 900 | result = (fb->buffer[rules->offset - fb->offset] == |
901 | rules->value.charv); | |
ef416fc2 | 902 | break; |
903 | ||
904 | case MIME_MAGIC_SHORT : | |
905 | /* | |
906 | * Load the buffer if necessary... | |
907 | */ | |
908 | ||
4400e98d | 909 | if (fb->offset < 0 || rules->offset < fb->offset || |
910 | (rules->offset + 2) > (fb->offset + fb->length)) | |
ef416fc2 | 911 | { |
912 | /* | |
913 | * Reload file buffer... | |
914 | */ | |
915 | ||
4400e98d | 916 | cupsFileSeek(fb->fp, rules->offset); |
917 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
918 | sizeof(fb->buffer)); | |
919 | fb->offset = rules->offset; | |
ef416fc2 | 920 | } |
921 | ||
922 | /* | |
923 | * Compare the short values; if the file is too short, it | |
924 | * can't match... | |
925 | */ | |
926 | ||
4400e98d | 927 | if (fb->length < 2) |
ef416fc2 | 928 | result = 0; |
929 | else | |
930 | { | |
4400e98d | 931 | bufptr = fb->buffer + rules->offset - fb->offset; |
ef416fc2 | 932 | shortv = (bufptr[0] << 8) | bufptr[1]; |
933 | result = (shortv == rules->value.shortv); | |
934 | } | |
935 | break; | |
936 | ||
937 | case MIME_MAGIC_INT : | |
938 | /* | |
939 | * Load the buffer if necessary... | |
940 | */ | |
941 | ||
4400e98d | 942 | if (fb->offset < 0 || rules->offset < fb->offset || |
943 | (rules->offset + 4) > (fb->offset + fb->length)) | |
ef416fc2 | 944 | { |
945 | /* | |
946 | * Reload file buffer... | |
947 | */ | |
948 | ||
4400e98d | 949 | cupsFileSeek(fb->fp, rules->offset); |
950 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
951 | sizeof(fb->buffer)); | |
952 | fb->offset = rules->offset; | |
ef416fc2 | 953 | } |
954 | ||
955 | /* | |
956 | * Compare the int values; if the file is too short, it | |
957 | * can't match... | |
958 | */ | |
959 | ||
4400e98d | 960 | if (fb->length < 4) |
ef416fc2 | 961 | result = 0; |
962 | else | |
963 | { | |
4400e98d | 964 | bufptr = fb->buffer + rules->offset - fb->offset; |
965 | intv = (((((bufptr[0] << 8) | bufptr[1]) << 8) | | |
966 | bufptr[2]) << 8) | bufptr[3]; | |
ef416fc2 | 967 | result = (intv == rules->value.intv); |
968 | } | |
969 | break; | |
970 | ||
971 | case MIME_MAGIC_LOCALE : | |
972 | #if defined(WIN32) || defined(__EMX__) || defined(__APPLE__) | |
4400e98d | 973 | result = (strcmp(rules->value.localev, |
974 | setlocale(LC_ALL, "")) == 0); | |
ef416fc2 | 975 | #else |
4400e98d | 976 | result = (strcmp(rules->value.localev, |
977 | setlocale(LC_MESSAGES, "")) == 0); | |
ef416fc2 | 978 | #endif /* __APPLE__ */ |
979 | break; | |
980 | ||
981 | case MIME_MAGIC_CONTAINS : | |
982 | /* | |
983 | * Load the buffer if necessary... | |
984 | */ | |
985 | ||
4400e98d | 986 | if (fb->offset < 0 || rules->offset < fb->offset || |
987 | (rules->offset + rules->region) > (fb->offset + fb->length)) | |
ef416fc2 | 988 | { |
989 | /* | |
990 | * Reload file buffer... | |
991 | */ | |
992 | ||
4400e98d | 993 | cupsFileSeek(fb->fp, rules->offset); |
994 | fb->length = cupsFileRead(fb->fp, (char *)fb->buffer, | |
995 | sizeof(fb->buffer)); | |
996 | fb->offset = rules->offset; | |
ef416fc2 | 997 | } |
998 | ||
999 | /* | |
1000 | * Compare the buffer against the string. If the file is too | |
1001 | * short then don't compare - it can't match... | |
1002 | */ | |
1003 | ||
4400e98d | 1004 | if ((rules->offset + rules->length) > (fb->offset + fb->length)) |
ef416fc2 | 1005 | result = 0; |
1006 | else | |
1007 | { | |
4400e98d | 1008 | if (fb->length > rules->region) |
ef416fc2 | 1009 | region = rules->region - rules->length; |
1010 | else | |
4400e98d | 1011 | region = fb->length - rules->length; |
ef416fc2 | 1012 | |
1013 | for (n = 0; n < region; n ++) | |
4400e98d | 1014 | if ((result = (memcmp(fb->buffer + rules->offset - fb->offset + n, |
1015 | rules->value.stringv, | |
1016 | rules->length) == 0)) != 0) | |
ef416fc2 | 1017 | break; |
1018 | } | |
1019 | break; | |
1020 | ||
1021 | default : | |
1022 | if (rules->child != NULL) | |
4400e98d | 1023 | result = checkrules(filename, fb, rules->child); |
ef416fc2 | 1024 | else |
1025 | result = 0; | |
1026 | break; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * If the logic is inverted, invert the result... | |
1031 | */ | |
1032 | ||
1033 | if (rules->invert) | |
1034 | result = !result; | |
1035 | ||
1036 | /* | |
1037 | * OK, now if the current logic is OR and this result is true, the this | |
1038 | * rule set is true. If the current logic is AND and this result is false, | |
1039 | * the the rule set is false... | |
1040 | */ | |
1041 | ||
75bd9771 MS |
1042 | DEBUG_printf(("checkrules: result of test %p (MIME_MAGIC_%s) is %d\n", |
1043 | rules, debug_tests[rules->op], result)); | |
ef416fc2 | 1044 | |
1045 | if ((result && logic == MIME_MAGIC_OR) || | |
1046 | (!result && logic == MIME_MAGIC_AND)) | |
1047 | return (result); | |
1048 | ||
1049 | /* | |
1050 | * Otherwise the jury is still out on this one, so move to the next rule. | |
1051 | */ | |
1052 | ||
1053 | rules = rules->next; | |
1054 | } | |
1055 | ||
1056 | return (result); | |
1057 | } | |
1058 | ||
1059 | ||
1060 | /* | |
1061 | * 'patmatch()' - Pattern matching... | |
1062 | */ | |
1063 | ||
1064 | static int /* O - 1 if match, 0 if no match */ | |
1065 | patmatch(const char *s, /* I - String to match against */ | |
1066 | const char *pat) /* I - Pattern to match against */ | |
1067 | { | |
1068 | /* | |
1069 | * Range check the input... | |
1070 | */ | |
1071 | ||
1072 | if (s == NULL || pat == NULL) | |
1073 | return (0); | |
1074 | ||
1075 | /* | |
1076 | * Loop through the pattern and match strings, and stop if we come to a | |
1077 | * point where the strings don't match or we find a complete match. | |
1078 | */ | |
1079 | ||
1080 | while (*s != '\0' && *pat != '\0') | |
1081 | { | |
1082 | if (*pat == '*') | |
1083 | { | |
1084 | /* | |
1085 | * Wildcard - 0 or more characters... | |
1086 | */ | |
1087 | ||
1088 | pat ++; | |
1089 | if (*pat == '\0') | |
4400e98d | 1090 | return (1); /* Last pattern char is *, so everything matches... */ |
ef416fc2 | 1091 | |
1092 | /* | |
1093 | * Test all remaining combinations until we get to the end of the string. | |
1094 | */ | |
1095 | ||
1096 | while (*s != '\0') | |
1097 | { | |
1098 | if (patmatch(s, pat)) | |
1099 | return (1); | |
1100 | ||
1101 | s ++; | |
1102 | } | |
1103 | } | |
1104 | else if (*pat == '?') | |
1105 | { | |
1106 | /* | |
1107 | * Wildcard - 1 character... | |
1108 | */ | |
1109 | ||
1110 | pat ++; | |
1111 | s ++; | |
1112 | continue; | |
1113 | } | |
1114 | else if (*pat == '[') | |
1115 | { | |
1116 | /* | |
1117 | * Match a character from the input set [chars]... | |
1118 | */ | |
1119 | ||
1120 | pat ++; | |
1121 | while (*pat != ']' && *pat != '\0') | |
1122 | if (*s == *pat) | |
1123 | break; | |
1124 | else | |
1125 | pat ++; | |
1126 | ||
1127 | if (*pat == ']' || *pat == '\0') | |
1128 | return (0); | |
1129 | ||
1130 | while (*pat != ']' && *pat != '\0') | |
1131 | pat ++; | |
1132 | ||
1133 | if (*pat == ']') | |
1134 | pat ++; | |
1135 | ||
1136 | continue; | |
1137 | } | |
1138 | else if (*pat == '\\') | |
1139 | { | |
1140 | /* | |
1141 | * Handle quoted characters... | |
1142 | */ | |
1143 | ||
1144 | pat ++; | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * Stop if the pattern and string don't match... | |
1149 | */ | |
1150 | ||
1151 | if (*pat++ != *s++) | |
1152 | return (0); | |
1153 | } | |
1154 | ||
1155 | /* | |
4400e98d | 1156 | * Done parsing the pattern and string; return 1 if the last character |
1157 | * matches and 0 otherwise... | |
ef416fc2 | 1158 | */ |
1159 | ||
1160 | return (*s == *pat); | |
1161 | } | |
1162 | ||
1163 | ||
1164 | /* | |
b19ccc9e | 1165 | * End of "$Id: type.c 7720 2008-07-11 22:46:21Z mike $". |
ef416fc2 | 1166 | */ |