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ef416fc2 | 1 | /* |
fa73b229 | 2 | * "$Id: type.c 4970 2006-01-24 14:05:45Z mike $" |
ef416fc2 | 3 | * |
4 | * MIME typing routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
fa73b229 | 6 | * Copyright 1997-2006 by Easy Software Products, all rights reserved. |
ef416fc2 | 7 | * |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * Contents: | |
25 | * | |
26 | * mimeAddType() - Add a MIME type to a database. | |
27 | * mimeAddTypeRule() - Add a detection rule for a file type. | |
28 | * mimeFileType() - Determine the type of a file. | |
29 | * mimeType() - Lookup a file type. | |
fa73b229 | 30 | * compare_types() - Compare two MIME super/type names. |
ef416fc2 | 31 | * checkrules() - Check each rule in a list. |
32 | * patmatch() - Pattern matching... | |
33 | */ | |
34 | ||
35 | /* | |
36 | * Include necessary headers... | |
37 | */ | |
38 | ||
39 | #include <stdio.h> | |
40 | #include <stdlib.h> | |
41 | #include <ctype.h> | |
42 | #include <locale.h> | |
43 | ||
44 | #include <cups/string.h> | |
45 | #include "mime.h" | |
46 | #include <cups/debug.h> | |
47 | ||
48 | ||
49 | /* | |
50 | * Local functions... | |
51 | */ | |
52 | ||
fa73b229 | 53 | static int compare_types(mime_type_t *t0, mime_type_t *t1); |
ef416fc2 | 54 | static int checkrules(const char *, cups_file_t *, mime_magic_t *); |
55 | static int patmatch(const char *, const char *); | |
56 | ||
57 | ||
58 | /* | |
59 | * 'mimeAddType()' - Add a MIME type to a database. | |
60 | */ | |
61 | ||
fa73b229 | 62 | mime_type_t * /* O - New (or existing) MIME type */ |
63 | mimeAddType(mime_t *mime, /* I - MIME database */ | |
64 | const char *super, /* I - Super-type name */ | |
65 | const char *type) /* I - Type name */ | |
ef416fc2 | 66 | { |
fa73b229 | 67 | mime_type_t *temp; /* New MIME type */ |
ef416fc2 | 68 | |
69 | ||
70 | /* | |
71 | * Range check input... | |
72 | */ | |
73 | ||
fa73b229 | 74 | if (!mime || !super || !type) |
ef416fc2 | 75 | return (NULL); |
76 | ||
77 | /* | |
78 | * See if the type already exists; if so, return the existing type... | |
79 | */ | |
80 | ||
81 | if ((temp = mimeType(mime, super, type)) != NULL) | |
82 | return (temp); | |
83 | ||
84 | /* | |
85 | * The type doesn't exist; add it... | |
86 | */ | |
87 | ||
fa73b229 | 88 | if (!mime->types) |
89 | mime->types = cupsArrayNew((cups_array_func_t)compare_types, NULL); | |
ef416fc2 | 90 | |
fa73b229 | 91 | if (!mime->types) |
ef416fc2 | 92 | return (NULL); |
ef416fc2 | 93 | |
fa73b229 | 94 | if ((temp = calloc(1, sizeof(mime_type_t) - MIME_MAX_TYPE + |
95 | strlen(type) + 1)) == NULL) | |
96 | return (NULL); | |
ef416fc2 | 97 | |
ef416fc2 | 98 | strlcpy(temp->super, super, sizeof(temp->super)); |
fa73b229 | 99 | strcpy(temp->type, type); /* Safe: temp->type is allocated */ |
ef416fc2 | 100 | |
fa73b229 | 101 | cupsArrayAdd(mime->types, temp); |
ef416fc2 | 102 | |
103 | return (temp); | |
104 | } | |
105 | ||
106 | ||
107 | /* | |
108 | * 'mimeAddTypeRule()' - Add a detection rule for a file type. | |
109 | */ | |
110 | ||
111 | int /* O - 0 on success, -1 on failure */ | |
112 | mimeAddTypeRule(mime_type_t *mt, /* I - Type to add to */ | |
113 | const char *rule) /* I - Rule to add */ | |
114 | { | |
115 | int num_values, /* Number of values seen */ | |
116 | op, /* Operation code */ | |
117 | logic, /* Logic for next rule */ | |
118 | invert; /* Invert following rule? */ | |
119 | char name[255], /* Name in rule string */ | |
120 | value[3][255], /* Value in rule string */ | |
121 | *ptr, /* Position in name or value */ | |
122 | quote; /* Quote character */ | |
123 | int length[3]; /* Length of each parameter */ | |
124 | mime_magic_t *temp, /* New rule */ | |
125 | *current; /* Current rule */ | |
126 | ||
127 | ||
128 | /* | |
129 | * Range check input... | |
130 | */ | |
131 | ||
fa73b229 | 132 | if (!mt || !rule) |
ef416fc2 | 133 | return (-1); |
134 | ||
135 | /* | |
136 | * Find the last rule in the top-level of the rules tree. | |
137 | */ | |
138 | ||
fa73b229 | 139 | for (current = mt->rules; current; current = current->next) |
140 | if (!current->next) | |
ef416fc2 | 141 | break; |
142 | ||
143 | /* | |
144 | * Parse the rules string. Most rules are either a file extension or a | |
145 | * comparison function: | |
146 | * | |
147 | * extension | |
148 | * function(parameters) | |
149 | */ | |
150 | ||
151 | logic = MIME_MAGIC_NOP; | |
152 | invert = 0; | |
153 | ||
154 | DEBUG_printf(("%s/%s: %s\n", mt->super, mt->type, rule)); | |
155 | ||
156 | while (*rule != '\0') | |
157 | { | |
158 | while (isspace(*rule & 255)) | |
159 | rule ++; | |
160 | ||
161 | if (*rule == '(') | |
162 | { | |
163 | DEBUG_puts("new parenthesis group"); | |
164 | logic = MIME_MAGIC_NOP; | |
165 | rule ++; | |
166 | } | |
167 | else if (*rule == ')') | |
168 | { | |
169 | DEBUG_puts("close paren..."); | |
170 | if (current == NULL || current->parent == NULL) | |
171 | return (-1); | |
172 | ||
173 | current = current->parent; | |
174 | ||
175 | if (current->parent == NULL) | |
176 | logic = MIME_MAGIC_OR; | |
177 | else | |
178 | logic = current->parent->op; | |
179 | ||
180 | rule ++; | |
181 | } | |
182 | else if (*rule == '+' && current != NULL) | |
183 | { | |
184 | if (logic != MIME_MAGIC_AND && | |
185 | current != NULL && current->prev != NULL && current->prev->prev != NULL) | |
186 | { | |
187 | /* | |
188 | * OK, we have more than 1 rule in the current tree level... Make a | |
189 | * new group tree and move the previous rule to it... | |
190 | */ | |
191 | ||
192 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
193 | return (-1); | |
194 | ||
195 | temp->op = MIME_MAGIC_AND; | |
196 | temp->child = current; | |
197 | temp->parent = current->parent; | |
198 | current->prev->next = temp; | |
199 | temp->prev = current->prev; | |
200 | ||
201 | current->prev = NULL; | |
202 | current->parent = temp; | |
203 | ||
204 | DEBUG_printf(("creating new AND group %p...\n", temp)); | |
205 | } | |
206 | else | |
207 | { | |
208 | DEBUG_printf(("setting group %p op to AND...\n", current->parent)); | |
209 | current->parent->op = MIME_MAGIC_AND; | |
210 | } | |
211 | ||
212 | logic = MIME_MAGIC_AND; | |
213 | rule ++; | |
214 | } | |
215 | else if (*rule == ',') | |
216 | { | |
217 | if (logic != MIME_MAGIC_OR && current != NULL) | |
218 | { | |
219 | /* | |
220 | * OK, we have two possibilities; either this is the top-level rule or | |
221 | * we have a bunch of AND rules at this level. | |
222 | */ | |
223 | ||
224 | if (current->parent == NULL) | |
225 | { | |
226 | /* | |
227 | * This is the top-level rule; we have to move *all* of the AND rules | |
228 | * down a level, as AND has precedence over OR. | |
229 | */ | |
230 | ||
231 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
232 | return (-1); | |
233 | ||
234 | DEBUG_printf(("creating new AND group %p inside OR group\n", temp)); | |
235 | ||
236 | while (current->prev != NULL) | |
237 | { | |
238 | current->parent = temp; | |
239 | current = current->prev; | |
240 | } | |
241 | ||
242 | current->parent = temp; | |
243 | temp->op = MIME_MAGIC_AND; | |
244 | temp->child = current; | |
245 | ||
246 | mt->rules = current = temp; | |
247 | } | |
248 | else | |
249 | { | |
250 | /* | |
251 | * This isn't the top rule, so go up one level... | |
252 | */ | |
253 | ||
254 | DEBUG_puts("going up one level"); | |
255 | current = current->parent; | |
256 | } | |
257 | } | |
258 | ||
259 | logic = MIME_MAGIC_OR; | |
260 | rule ++; | |
261 | } | |
262 | else if (*rule == '!') | |
263 | { | |
264 | DEBUG_puts("NOT"); | |
265 | invert = 1; | |
266 | rule ++; | |
267 | } | |
268 | else if (isalnum(*rule & 255)) | |
269 | { | |
270 | /* | |
271 | * Read an extension name or a function... | |
272 | */ | |
273 | ||
274 | for (ptr = name; isalnum(*rule & 255) && (ptr - name) < (sizeof(name) - 1);) | |
275 | *ptr++ = *rule++; | |
276 | ||
277 | *ptr = '\0'; | |
278 | num_values = 0; | |
279 | ||
280 | if (*rule == '(') | |
281 | { | |
282 | /* | |
283 | * Read function parameters... | |
284 | */ | |
285 | ||
286 | rule ++; | |
287 | for (num_values = 0; | |
288 | num_values < (sizeof(value) / sizeof(value[0])); | |
289 | num_values ++) | |
290 | { | |
291 | ptr = value[num_values]; | |
292 | ||
293 | while ((ptr - value[num_values]) < (sizeof(value[0]) - 1) && | |
294 | *rule != '\0' && *rule != ',' && *rule != ')') | |
295 | { | |
296 | if (isspace(*rule & 255)) | |
297 | { | |
298 | /* | |
299 | * Ignore whitespace... | |
300 | */ | |
301 | ||
302 | rule ++; | |
303 | continue; | |
304 | } | |
305 | else if (*rule == '\"' || *rule == '\'') | |
306 | { | |
307 | /* | |
308 | * Copy quoted strings literally... | |
309 | */ | |
310 | ||
311 | quote = *rule++; | |
312 | ||
313 | while (*rule != '\0' && *rule != quote && | |
314 | (ptr - value[num_values]) < (sizeof(value[0]) - 1)) | |
315 | *ptr++ = *rule++; | |
316 | ||
317 | if (*rule == quote) | |
318 | rule ++; | |
319 | else | |
320 | return (-1); | |
321 | } | |
322 | else if (*rule == '<') | |
323 | { | |
324 | rule ++; | |
325 | ||
326 | while (*rule != '>' && *rule != '\0' && | |
327 | (ptr - value[num_values]) < (sizeof(value[0]) - 1)) | |
328 | { | |
329 | if (isxdigit(rule[0] & 255) && isxdigit(rule[1] & 255)) | |
330 | { | |
331 | if (isdigit(*rule)) | |
332 | *ptr = (*rule++ - '0') << 4; | |
333 | else | |
334 | *ptr = (tolower(*rule++) - 'a' + 10) << 4; | |
335 | ||
336 | if (isdigit(*rule)) | |
337 | *ptr++ |= *rule++ - '0'; | |
338 | else | |
339 | *ptr++ |= tolower(*rule++) - 'a' + 10; | |
340 | } | |
341 | else | |
342 | return (-1); | |
343 | } | |
344 | ||
345 | if (*rule == '>') | |
346 | rule ++; | |
347 | else | |
348 | return (-1); | |
349 | } | |
350 | else | |
351 | *ptr++ = *rule++; | |
352 | } | |
353 | ||
354 | *ptr = '\0'; | |
355 | length[num_values] = ptr - value[num_values]; | |
356 | ||
357 | if (*rule != ',') | |
358 | break; | |
359 | ||
360 | rule ++; | |
361 | } | |
362 | ||
363 | if (*rule != ')') | |
364 | return (-1); | |
365 | ||
366 | rule ++; | |
367 | ||
368 | /* | |
369 | * Figure out the function... | |
370 | */ | |
371 | ||
fa73b229 | 372 | if (!strcmp(name, "match")) |
ef416fc2 | 373 | op = MIME_MAGIC_MATCH; |
fa73b229 | 374 | else if (!strcmp(name, "ascii")) |
ef416fc2 | 375 | op = MIME_MAGIC_ASCII; |
fa73b229 | 376 | else if (!strcmp(name, "printable")) |
ef416fc2 | 377 | op = MIME_MAGIC_PRINTABLE; |
fa73b229 | 378 | else if (!strcmp(name, "string")) |
ef416fc2 | 379 | op = MIME_MAGIC_STRING; |
fa73b229 | 380 | else if (!strcmp(name, "istring")) |
ef416fc2 | 381 | op = MIME_MAGIC_ISTRING; |
fa73b229 | 382 | else if (!strcmp(name, "char")) |
ef416fc2 | 383 | op = MIME_MAGIC_CHAR; |
fa73b229 | 384 | else if (!strcmp(name, "short")) |
ef416fc2 | 385 | op = MIME_MAGIC_SHORT; |
fa73b229 | 386 | else if (!strcmp(name, "int")) |
ef416fc2 | 387 | op = MIME_MAGIC_INT; |
fa73b229 | 388 | else if (!strcmp(name, "locale")) |
ef416fc2 | 389 | op = MIME_MAGIC_LOCALE; |
fa73b229 | 390 | else if (!strcmp(name, "contains")) |
ef416fc2 | 391 | op = MIME_MAGIC_CONTAINS; |
392 | else | |
393 | return (-1); | |
394 | } | |
395 | else | |
396 | { | |
397 | /* | |
398 | * This is just a filename match on the extension... | |
399 | */ | |
400 | ||
401 | snprintf(value[0], sizeof(value[0]), "*.%s", name); | |
402 | length[0] = strlen(value[0]); | |
403 | num_values = 1; | |
404 | op = MIME_MAGIC_MATCH; | |
405 | } | |
406 | ||
407 | /* | |
408 | * Add a rule for this operation. | |
409 | */ | |
410 | ||
411 | if ((temp = calloc(1, sizeof(mime_magic_t))) == NULL) | |
412 | return (-1); | |
413 | ||
414 | temp->invert = invert; | |
415 | if (current != NULL) | |
416 | { | |
417 | temp->parent = current->parent; | |
418 | current->next = temp; | |
419 | } | |
420 | else | |
421 | mt->rules = temp; | |
422 | ||
423 | temp->prev = current; | |
424 | ||
425 | if (logic == MIME_MAGIC_NOP) | |
426 | { | |
427 | /* | |
428 | * Add parenthetical grouping... | |
429 | */ | |
430 | ||
431 | DEBUG_printf(("making new OR group %p for parenthesis...\n", temp)); | |
432 | ||
433 | temp->op = MIME_MAGIC_OR; | |
434 | ||
435 | if ((temp->child = calloc(1, sizeof(mime_magic_t))) == NULL) | |
436 | return (-1); | |
437 | ||
438 | temp->child->parent = temp; | |
439 | ||
440 | temp = temp->child; | |
441 | logic = MIME_MAGIC_OR; | |
442 | } | |
443 | ||
444 | DEBUG_printf(("adding %p: %s, op = %d, logic = %d, invert = %d\n", | |
445 | temp, name, op, logic, invert)); | |
446 | ||
447 | /* | |
448 | * Fill in data for the rule... | |
449 | */ | |
450 | ||
451 | current = temp; | |
452 | temp->op = op; | |
453 | invert = 0; | |
454 | ||
455 | switch (op) | |
456 | { | |
457 | case MIME_MAGIC_MATCH : | |
458 | if (length[0] > (sizeof(temp->value.matchv) - 1)) | |
459 | return (-1); | |
460 | strcpy(temp->value.matchv, value[0]); | |
461 | break; | |
462 | case MIME_MAGIC_ASCII : | |
463 | case MIME_MAGIC_PRINTABLE : | |
464 | temp->offset = strtol(value[0], NULL, 0); | |
465 | temp->length = strtol(value[1], NULL, 0); | |
466 | if (temp->length > MIME_MAX_BUFFER) | |
467 | temp->length = MIME_MAX_BUFFER; | |
468 | break; | |
469 | case MIME_MAGIC_STRING : | |
470 | case MIME_MAGIC_ISTRING : | |
471 | temp->offset = strtol(value[0], NULL, 0); | |
472 | if (length[1] > sizeof(temp->value.stringv)) | |
473 | return (-1); | |
474 | temp->length = length[1]; | |
475 | memcpy(temp->value.stringv, value[1], length[1]); | |
476 | break; | |
477 | case MIME_MAGIC_CHAR : | |
478 | temp->offset = strtol(value[0], NULL, 0); | |
479 | if (length[1] == 1) | |
480 | temp->value.charv = value[1][0]; | |
481 | else | |
482 | temp->value.charv = (char)strtol(value[1], NULL, 0); | |
483 | break; | |
484 | case MIME_MAGIC_SHORT : | |
485 | temp->offset = strtol(value[0], NULL, 0); | |
486 | temp->value.shortv = (short)strtol(value[1], NULL, 0); | |
487 | break; | |
488 | case MIME_MAGIC_INT : | |
489 | temp->offset = strtol(value[0], NULL, 0); | |
490 | temp->value.intv = (int)strtol(value[1], NULL, 0); | |
491 | break; | |
492 | case MIME_MAGIC_LOCALE : | |
493 | if (length[0] > (sizeof(temp->value.localev) - 1)) | |
494 | return (-1); | |
495 | ||
496 | strcpy(temp->value.localev, value[0]); | |
497 | break; | |
498 | case MIME_MAGIC_CONTAINS : | |
499 | temp->offset = strtol(value[0], NULL, 0); | |
500 | temp->region = strtol(value[1], NULL, 0); | |
501 | if (length[2] > sizeof(temp->value.stringv)) | |
502 | return (-1); | |
503 | temp->length = length[2]; | |
504 | memcpy(temp->value.stringv, value[2], length[2]); | |
505 | break; | |
506 | } | |
507 | } | |
508 | else | |
509 | break; | |
510 | } | |
511 | ||
512 | return (0); | |
513 | } | |
514 | ||
515 | ||
516 | /* | |
517 | * 'mimeFileType()' - Determine the type of a file. | |
518 | */ | |
519 | ||
520 | mime_type_t * /* O - Type of file */ | |
521 | mimeFileType(mime_t *mime, /* I - MIME database */ | |
522 | const char *pathname, /* I - Name of file to check */ | |
523 | int *compression) /* O - Is the file compressed? */ | |
524 | { | |
ef416fc2 | 525 | cups_file_t *fp; /* File pointer */ |
fa73b229 | 526 | mime_type_t *type; /* File type */ |
ef416fc2 | 527 | const char *filename; /* Base filename of file */ |
528 | ||
529 | ||
530 | DEBUG_printf(("mimeFileType(mime=%p, pathname=\"%s\", compression=%p)\n", | |
531 | mime, pathname ? pathname : "(nil)", compression)); | |
532 | ||
533 | /* | |
534 | * Range check input parameters... | |
535 | */ | |
536 | ||
fa73b229 | 537 | if (!mime || !pathname) |
ef416fc2 | 538 | return (NULL); |
539 | ||
540 | /* | |
541 | * Try to open the file... | |
542 | */ | |
543 | ||
544 | if ((fp = cupsFileOpen(pathname, "r")) == NULL) | |
545 | return (NULL); | |
546 | ||
547 | /* | |
548 | * Figure out the filename (without directory portion)... | |
549 | */ | |
550 | ||
551 | if ((filename = strrchr(pathname, '/')) != NULL) | |
552 | filename ++; | |
553 | else | |
554 | filename = pathname; | |
555 | ||
556 | /* | |
557 | * Then check it against all known types... | |
558 | */ | |
559 | ||
fa73b229 | 560 | for (type = (mime_type_t *)cupsArrayFirst(mime->types); |
561 | type; | |
562 | type = (mime_type_t *)cupsArrayNext(mime->types)) | |
563 | if (checkrules(filename, fp, type->rules)) | |
ef416fc2 | 564 | break; |
565 | ||
566 | /* | |
567 | * Finally, close the file and return a match (if any)... | |
568 | */ | |
569 | ||
570 | if (compression) | |
571 | *compression = cupsFileCompression(fp); | |
572 | ||
573 | cupsFileClose(fp); | |
574 | ||
fa73b229 | 575 | return (type); |
ef416fc2 | 576 | } |
577 | ||
578 | ||
579 | /* | |
580 | * 'mimeType()' - Lookup a file type. | |
581 | */ | |
582 | ||
fa73b229 | 583 | mime_type_t * /* O - Matching file type definition */ |
584 | mimeType(mime_t *mime, /* I - MIME database */ | |
585 | const char *super, /* I - Super-type name */ | |
586 | const char *type) /* I - Type name */ | |
ef416fc2 | 587 | { |
fa73b229 | 588 | mime_type_t key; /* MIME type search key*/ |
589 | ||
ef416fc2 | 590 | |
591 | /* | |
592 | * Range check input... | |
593 | */ | |
594 | ||
fa73b229 | 595 | if (!mime || !super || !type) |
ef416fc2 | 596 | return (NULL); |
597 | ||
598 | /* | |
599 | * Lookup the type in the array... | |
600 | */ | |
601 | ||
602 | strlcpy(key.super, super, sizeof(key.super)); | |
fa73b229 | 603 | strlcpy(key.type, type, sizeof(key.type)); |
ef416fc2 | 604 | |
fa73b229 | 605 | return ((mime_type_t *)cupsArrayFind(mime->types, &key)); |
ef416fc2 | 606 | } |
607 | ||
608 | ||
609 | /* | |
fa73b229 | 610 | * 'compare_types()' - Compare two MIME super/type names. |
ef416fc2 | 611 | */ |
612 | ||
fa73b229 | 613 | static int /* O - Result of comparison */ |
614 | compare_types(mime_type_t *t0, /* I - First type */ | |
615 | mime_type_t *t1) /* I - Second type */ | |
ef416fc2 | 616 | { |
fa73b229 | 617 | int i; /* Result of comparison */ |
ef416fc2 | 618 | |
619 | ||
fa73b229 | 620 | if ((i = strcmp(t0->super, t1->super)) == 0) |
621 | i = strcmp(t0->type, t1->type); | |
ef416fc2 | 622 | |
623 | return (i); | |
624 | } | |
625 | ||
626 | ||
627 | /* | |
628 | * 'checkrules()' - Check each rule in a list. | |
629 | */ | |
630 | ||
631 | static int /* O - 1 if match, 0 if no match */ | |
632 | checkrules(const char *filename, /* I - Filename */ | |
633 | cups_file_t *fp, /* I - File to check */ | |
634 | mime_magic_t *rules) /* I - Rules to check */ | |
635 | { | |
636 | int n; /* Looping var */ | |
637 | int region; /* Region to look at */ | |
638 | int logic, /* Logic to apply */ | |
639 | result, /* Result of test */ | |
640 | intv; /* Integer value */ | |
641 | short shortv; /* Short value */ | |
642 | unsigned char buffer[MIME_MAX_BUFFER],/* Input buffer */ | |
643 | *bufptr; /* Current buffer position */ | |
644 | int bufoffset, /* Offset in file for buffer */ | |
645 | buflength; /* Length of data in buffer */ | |
646 | #ifdef DEBUG | |
647 | const char * const debug_tests[] = /* Test names... */ | |
648 | { | |
649 | "NOP", /* No operation */ | |
650 | "AND", /* Logical AND of all children */ | |
651 | "OR", /* Logical OR of all children */ | |
652 | "MATCH", /* Filename match */ | |
653 | "ASCII", /* ASCII characters in range */ | |
654 | "PRINTABLE", /* Printable characters (32-255) in range */ | |
655 | "STRING", /* String matches */ | |
656 | "CHAR", /* Character/byte matches */ | |
657 | "SHORT", /* Short/16-bit word matches */ | |
658 | "INT", /* Integer/32-bit word matches */ | |
659 | "LOCALE" /* Current locale matches string */ | |
660 | "CONTAINS" /* File contains a string */ | |
661 | "ISTRING" /* Case-insensitive string matches */ | |
662 | }; | |
663 | #endif /* DEBUG */ | |
664 | ||
665 | ||
666 | DEBUG_printf(("checkrules(filename=\"%s\", fp=%p, rules=%p)\n", filename, | |
667 | fp, rules)); | |
668 | ||
669 | if (rules == NULL) | |
670 | return (0); | |
671 | ||
672 | if (rules->parent == NULL) | |
673 | logic = MIME_MAGIC_OR; | |
674 | else | |
675 | logic = rules->parent->op; | |
676 | ||
677 | bufoffset = -1; | |
678 | buflength = 0; | |
679 | result = 0; | |
680 | ||
681 | while (rules != NULL) | |
682 | { | |
683 | /* | |
684 | * Compute the result of this rule... | |
685 | */ | |
686 | ||
687 | switch (rules->op) | |
688 | { | |
689 | case MIME_MAGIC_MATCH : | |
690 | result = patmatch(filename, rules->value.matchv); | |
691 | break; | |
692 | ||
693 | case MIME_MAGIC_ASCII : | |
694 | /* | |
695 | * Load the buffer if necessary... | |
696 | */ | |
697 | ||
698 | if (bufoffset < 0 || rules->offset < bufoffset || | |
699 | (rules->offset + rules->length) > (bufoffset + buflength)) | |
700 | { | |
701 | /* | |
702 | * Reload file buffer... | |
703 | */ | |
704 | ||
705 | cupsFileSeek(fp, rules->offset); | |
706 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
707 | bufoffset = rules->offset; | |
708 | } | |
709 | ||
710 | /* | |
711 | * Test for ASCII printable characters plus standard control chars. | |
712 | */ | |
713 | ||
714 | if ((rules->offset + rules->length) > (bufoffset + buflength)) | |
715 | n = bufoffset + buflength - rules->offset; | |
716 | else | |
717 | n = rules->length; | |
718 | ||
719 | bufptr = buffer + rules->offset - bufoffset; | |
720 | while (n > 0) | |
721 | if ((*bufptr >= 32 && *bufptr <= 126) || | |
722 | (*bufptr >= 8 && *bufptr <= 13) || | |
723 | *bufptr == 26 || *bufptr == 27) | |
724 | { | |
725 | n --; | |
726 | bufptr ++; | |
727 | } | |
728 | else | |
729 | break; | |
730 | ||
731 | result = (n == 0); | |
732 | break; | |
733 | ||
734 | case MIME_MAGIC_PRINTABLE : | |
735 | /* | |
736 | * Load the buffer if necessary... | |
737 | */ | |
738 | ||
739 | if (bufoffset < 0 || rules->offset < bufoffset || | |
740 | (rules->offset + rules->length) > (bufoffset + buflength)) | |
741 | { | |
742 | /* | |
743 | * Reload file buffer... | |
744 | */ | |
745 | ||
746 | cupsFileSeek(fp, rules->offset); | |
747 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
748 | bufoffset = rules->offset; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Test for 8-bit printable characters plus standard control chars. | |
753 | */ | |
754 | ||
755 | if ((rules->offset + rules->length) > (bufoffset + buflength)) | |
756 | n = bufoffset + buflength - rules->offset; | |
757 | else | |
758 | n = rules->length; | |
759 | ||
760 | bufptr = buffer + rules->offset - bufoffset; | |
761 | ||
762 | while (n > 0) | |
763 | if (*bufptr >= 128 || | |
764 | (*bufptr >= 32 && *bufptr <= 126) || | |
765 | (*bufptr >= 8 && *bufptr <= 13) || | |
766 | *bufptr == 26 || *bufptr == 27) | |
767 | { | |
768 | n --; | |
769 | bufptr ++; | |
770 | } | |
771 | else | |
772 | break; | |
773 | ||
774 | result = (n == 0); | |
775 | break; | |
776 | ||
777 | case MIME_MAGIC_STRING : | |
778 | DEBUG_printf((" string(%d, \"%s\")\n", rules->offset, | |
779 | rules->value.stringv)); | |
780 | ||
781 | /* | |
782 | * Load the buffer if necessary... | |
783 | */ | |
784 | ||
785 | if (bufoffset < 0 || rules->offset < bufoffset || | |
786 | (rules->offset + rules->length) > (bufoffset + buflength)) | |
787 | { | |
788 | /* | |
789 | * Reload file buffer... | |
790 | */ | |
791 | ||
792 | cupsFileSeek(fp, rules->offset); | |
793 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
794 | bufoffset = rules->offset; | |
795 | ||
796 | DEBUG_printf((" loaded %d byte buffer at %d, starts with \"%c%c%c%c\"...\n", | |
797 | buflength, bufoffset, buffer[0], buffer[1], | |
798 | buffer[2], buffer[3])); | |
799 | } | |
800 | ||
801 | /* | |
802 | * Compare the buffer against the string. If the file is too | |
803 | * short then don't compare - it can't match... | |
804 | */ | |
805 | ||
806 | if ((rules->offset + rules->length) > (bufoffset + buflength)) | |
807 | result = 0; | |
808 | else | |
809 | result = (memcmp(buffer + rules->offset - bufoffset, | |
810 | rules->value.stringv, rules->length) == 0); | |
811 | DEBUG_printf((" result=%d\n", result)); | |
812 | break; | |
813 | ||
814 | case MIME_MAGIC_ISTRING : | |
815 | /* | |
816 | * Load the buffer if necessary... | |
817 | */ | |
818 | ||
819 | if (bufoffset < 0 || rules->offset < bufoffset || | |
820 | (rules->offset + rules->length) > (bufoffset + buflength)) | |
821 | { | |
822 | /* | |
823 | * Reload file buffer... | |
824 | */ | |
825 | ||
826 | cupsFileSeek(fp, rules->offset); | |
827 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
828 | bufoffset = rules->offset; | |
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 | ||
836 | if ((rules->offset + rules->length) > (bufoffset + buflength)) | |
837 | result = 0; | |
838 | else | |
839 | result = (strncasecmp((char *)buffer + rules->offset - bufoffset, | |
840 | rules->value.stringv, rules->length) == 0); | |
841 | break; | |
842 | ||
843 | case MIME_MAGIC_CHAR : | |
844 | /* | |
845 | * Load the buffer if necessary... | |
846 | */ | |
847 | ||
848 | if (bufoffset < 0 || rules->offset < bufoffset) | |
849 | { | |
850 | /* | |
851 | * Reload file buffer... | |
852 | */ | |
853 | ||
854 | cupsFileSeek(fp, rules->offset); | |
855 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
856 | bufoffset = rules->offset; | |
857 | } | |
858 | ||
859 | /* | |
860 | * Compare the character values; if the file is too short, it | |
861 | * can't match... | |
862 | */ | |
863 | ||
864 | if (buflength < 1) | |
865 | result = 0; | |
866 | else | |
867 | result = (buffer[rules->offset - bufoffset] == rules->value.charv); | |
868 | break; | |
869 | ||
870 | case MIME_MAGIC_SHORT : | |
871 | /* | |
872 | * Load the buffer if necessary... | |
873 | */ | |
874 | ||
875 | if (bufoffset < 0 || rules->offset < bufoffset || | |
876 | (rules->offset + 2) > (bufoffset + buflength)) | |
877 | { | |
878 | /* | |
879 | * Reload file buffer... | |
880 | */ | |
881 | ||
882 | cupsFileSeek(fp, rules->offset); | |
883 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
884 | bufoffset = rules->offset; | |
885 | } | |
886 | ||
887 | /* | |
888 | * Compare the short values; if the file is too short, it | |
889 | * can't match... | |
890 | */ | |
891 | ||
892 | if (buflength < 2) | |
893 | result = 0; | |
894 | else | |
895 | { | |
896 | bufptr = buffer + rules->offset - bufoffset; | |
897 | shortv = (bufptr[0] << 8) | bufptr[1]; | |
898 | result = (shortv == rules->value.shortv); | |
899 | } | |
900 | break; | |
901 | ||
902 | case MIME_MAGIC_INT : | |
903 | /* | |
904 | * Load the buffer if necessary... | |
905 | */ | |
906 | ||
907 | if (bufoffset < 0 || rules->offset < bufoffset || | |
908 | (rules->offset + 4) > (bufoffset + buflength)) | |
909 | { | |
910 | /* | |
911 | * Reload file buffer... | |
912 | */ | |
913 | ||
914 | cupsFileSeek(fp, rules->offset); | |
915 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
916 | bufoffset = rules->offset; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Compare the int values; if the file is too short, it | |
921 | * can't match... | |
922 | */ | |
923 | ||
924 | if (buflength < 4) | |
925 | result = 0; | |
926 | else | |
927 | { | |
928 | bufptr = buffer + rules->offset - bufoffset; | |
929 | intv = (((((bufptr[0] << 8) | bufptr[1]) << 8) | bufptr[2]) << 8) | | |
930 | bufptr[3];; | |
931 | result = (intv == rules->value.intv); | |
932 | } | |
933 | break; | |
934 | ||
935 | case MIME_MAGIC_LOCALE : | |
936 | #if defined(WIN32) || defined(__EMX__) || defined(__APPLE__) | |
937 | result = (strcmp(rules->value.localev, setlocale(LC_ALL, "")) == 0); | |
938 | #else | |
939 | result = (strcmp(rules->value.localev, setlocale(LC_MESSAGES, "")) == 0); | |
940 | #endif /* __APPLE__ */ | |
941 | break; | |
942 | ||
943 | case MIME_MAGIC_CONTAINS : | |
944 | /* | |
945 | * Load the buffer if necessary... | |
946 | */ | |
947 | ||
948 | if (bufoffset < 0 || rules->offset < bufoffset || | |
949 | (rules->offset + rules->region) > (bufoffset + buflength)) | |
950 | { | |
951 | /* | |
952 | * Reload file buffer... | |
953 | */ | |
954 | ||
955 | cupsFileSeek(fp, rules->offset); | |
956 | buflength = cupsFileRead(fp, (char *)buffer, sizeof(buffer)); | |
957 | bufoffset = rules->offset; | |
958 | } | |
959 | ||
960 | /* | |
961 | * Compare the buffer against the string. If the file is too | |
962 | * short then don't compare - it can't match... | |
963 | */ | |
964 | ||
965 | if ((rules->offset + rules->length) > (bufoffset + buflength)) | |
966 | result = 0; | |
967 | else | |
968 | { | |
969 | if (buflength > rules->region) | |
970 | region = rules->region - rules->length; | |
971 | else | |
972 | region = buflength - rules->length; | |
973 | ||
974 | for (n = 0; n < region; n ++) | |
975 | if ((result = (memcmp(buffer + rules->offset - bufoffset + n, | |
976 | rules->value.stringv, rules->length) == 0)) != 0) | |
977 | break; | |
978 | } | |
979 | break; | |
980 | ||
981 | default : | |
982 | if (rules->child != NULL) | |
983 | result = checkrules(filename, fp, rules->child); | |
984 | else | |
985 | result = 0; | |
986 | break; | |
987 | } | |
988 | ||
989 | /* | |
990 | * If the logic is inverted, invert the result... | |
991 | */ | |
992 | ||
993 | if (rules->invert) | |
994 | result = !result; | |
995 | ||
996 | /* | |
997 | * OK, now if the current logic is OR and this result is true, the this | |
998 | * rule set is true. If the current logic is AND and this result is false, | |
999 | * the the rule set is false... | |
1000 | */ | |
1001 | ||
1002 | DEBUG_printf((" result of test %p (MIME_MAGIC_%s) is %d\n", rules, | |
1003 | debug_tests[rules->op], result)); | |
1004 | ||
1005 | if ((result && logic == MIME_MAGIC_OR) || | |
1006 | (!result && logic == MIME_MAGIC_AND)) | |
1007 | return (result); | |
1008 | ||
1009 | /* | |
1010 | * Otherwise the jury is still out on this one, so move to the next rule. | |
1011 | */ | |
1012 | ||
1013 | rules = rules->next; | |
1014 | } | |
1015 | ||
1016 | return (result); | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /* | |
1021 | * 'patmatch()' - Pattern matching... | |
1022 | */ | |
1023 | ||
1024 | static int /* O - 1 if match, 0 if no match */ | |
1025 | patmatch(const char *s, /* I - String to match against */ | |
1026 | const char *pat) /* I - Pattern to match against */ | |
1027 | { | |
1028 | /* | |
1029 | * Range check the input... | |
1030 | */ | |
1031 | ||
1032 | if (s == NULL || pat == NULL) | |
1033 | return (0); | |
1034 | ||
1035 | /* | |
1036 | * Loop through the pattern and match strings, and stop if we come to a | |
1037 | * point where the strings don't match or we find a complete match. | |
1038 | */ | |
1039 | ||
1040 | while (*s != '\0' && *pat != '\0') | |
1041 | { | |
1042 | if (*pat == '*') | |
1043 | { | |
1044 | /* | |
1045 | * Wildcard - 0 or more characters... | |
1046 | */ | |
1047 | ||
1048 | pat ++; | |
1049 | if (*pat == '\0') | |
1050 | return (1); /* Last pattern char is *, so everything matches now... */ | |
1051 | ||
1052 | /* | |
1053 | * Test all remaining combinations until we get to the end of the string. | |
1054 | */ | |
1055 | ||
1056 | while (*s != '\0') | |
1057 | { | |
1058 | if (patmatch(s, pat)) | |
1059 | return (1); | |
1060 | ||
1061 | s ++; | |
1062 | } | |
1063 | } | |
1064 | else if (*pat == '?') | |
1065 | { | |
1066 | /* | |
1067 | * Wildcard - 1 character... | |
1068 | */ | |
1069 | ||
1070 | pat ++; | |
1071 | s ++; | |
1072 | continue; | |
1073 | } | |
1074 | else if (*pat == '[') | |
1075 | { | |
1076 | /* | |
1077 | * Match a character from the input set [chars]... | |
1078 | */ | |
1079 | ||
1080 | pat ++; | |
1081 | while (*pat != ']' && *pat != '\0') | |
1082 | if (*s == *pat) | |
1083 | break; | |
1084 | else | |
1085 | pat ++; | |
1086 | ||
1087 | if (*pat == ']' || *pat == '\0') | |
1088 | return (0); | |
1089 | ||
1090 | while (*pat != ']' && *pat != '\0') | |
1091 | pat ++; | |
1092 | ||
1093 | if (*pat == ']') | |
1094 | pat ++; | |
1095 | ||
1096 | continue; | |
1097 | } | |
1098 | else if (*pat == '\\') | |
1099 | { | |
1100 | /* | |
1101 | * Handle quoted characters... | |
1102 | */ | |
1103 | ||
1104 | pat ++; | |
1105 | } | |
1106 | ||
1107 | /* | |
1108 | * Stop if the pattern and string don't match... | |
1109 | */ | |
1110 | ||
1111 | if (*pat++ != *s++) | |
1112 | return (0); | |
1113 | } | |
1114 | ||
1115 | /* | |
1116 | * Done parsing the pattern and string; return 1 if the last character matches | |
1117 | * and 0 otherwise... | |
1118 | */ | |
1119 | ||
1120 | return (*s == *pat); | |
1121 | } | |
1122 | ||
1123 | ||
1124 | /* | |
fa73b229 | 1125 | * End of "$Id: type.c 4970 2006-01-24 14:05:45Z mike $". |
ef416fc2 | 1126 | */ |