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Commit | Line | Data |
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ef416fc2 | 1 | /* |
7e86f2f6 | 2 | * String functions for CUPS. |
ef416fc2 | 3 | * |
86c184ff MS |
4 | * Copyright © 2007-2019 by Apple Inc. |
5 | * Copyright © 1997-2007 by Easy Software Products. | |
ef416fc2 | 6 | * |
86c184ff MS |
7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more |
8 | * information. | |
ef416fc2 | 9 | */ |
10 | ||
11 | /* | |
12 | * Include necessary headers... | |
13 | */ | |
14 | ||
7cf5915e | 15 | #define _CUPS_STRING_C_ |
554aa7b7 | 16 | #include "cups-private.h" |
fb863569 | 17 | #include "debug-internal.h" |
745129be | 18 | #include <stddef.h> |
4400e98d | 19 | #include <limits.h> |
d6ae789d | 20 | |
21 | ||
22 | /* | |
23 | * Local globals... | |
24 | */ | |
25 | ||
6d2f911b | 26 | static _cups_mutex_t sp_mutex = _CUPS_MUTEX_INITIALIZER; |
d6ae789d | 27 | /* Mutex to control access to pool */ |
d6ae789d | 28 | static cups_array_t *stringpool = NULL; |
29 | /* Global string pool */ | |
4400e98d | 30 | |
31 | ||
32 | /* | |
33 | * Local functions... | |
34 | */ | |
35 | ||
36 | static int compare_sp_items(_cups_sp_item_t *a, _cups_sp_item_t *b); | |
37 | ||
38 | ||
39 | /* | |
757d2cad | 40 | * '_cupsStrAlloc()' - Allocate/reference a string. |
4400e98d | 41 | */ |
42 | ||
43 | char * /* O - String pointer */ | |
757d2cad | 44 | _cupsStrAlloc(const char *s) /* I - String */ |
4400e98d | 45 | { |
5a9febac | 46 | size_t slen; /* Length of string */ |
4400e98d | 47 | _cups_sp_item_t *item, /* String pool item */ |
426c6a59 | 48 | *key; /* Search key */ |
4400e98d | 49 | |
50 | ||
51 | /* | |
52 | * Range check input... | |
53 | */ | |
54 | ||
55 | if (!s) | |
56 | return (NULL); | |
57 | ||
58 | /* | |
59 | * Get the string pool... | |
60 | */ | |
61 | ||
6d2f911b | 62 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 63 | |
64 | if (!stringpool) | |
65 | stringpool = cupsArrayNew((cups_array_func_t)compare_sp_items, NULL); | |
4400e98d | 66 | |
d6ae789d | 67 | if (!stringpool) |
68 | { | |
6d2f911b | 69 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 70 | |
4400e98d | 71 | return (NULL); |
d6ae789d | 72 | } |
4400e98d | 73 | |
74 | /* | |
75 | * See if the string is already in the pool... | |
76 | */ | |
77 | ||
745129be | 78 | key = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
4400e98d | 79 | |
426c6a59 | 80 | if ((item = (_cups_sp_item_t *)cupsArrayFind(stringpool, key)) != NULL) |
4400e98d | 81 | { |
82 | /* | |
83 | * Found it, return the cached string... | |
84 | */ | |
85 | ||
86 | item->ref_count ++; | |
87 | ||
745129be | 88 | #ifdef DEBUG_GUARDS |
e07d4801 MS |
89 | DEBUG_printf(("5_cupsStrAlloc: Using string %p(%s) for \"%s\", guard=%08x, " |
90 | "ref_count=%d", item, item->str, s, item->guard, | |
745129be MS |
91 | item->ref_count)); |
92 | ||
93 | if (item->guard != _CUPS_STR_GUARD) | |
94 | abort(); | |
95 | #endif /* DEBUG_GUARDS */ | |
96 | ||
6d2f911b | 97 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 98 | |
4400e98d | 99 | return (item->str); |
100 | } | |
101 | ||
102 | /* | |
103 | * Not found, so allocate a new one... | |
104 | */ | |
105 | ||
5a9febac MS |
106 | slen = strlen(s); |
107 | item = (_cups_sp_item_t *)calloc(1, sizeof(_cups_sp_item_t) + slen); | |
4400e98d | 108 | if (!item) |
d6ae789d | 109 | { |
6d2f911b | 110 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 111 | |
4400e98d | 112 | return (NULL); |
d6ae789d | 113 | } |
4400e98d | 114 | |
115 | item->ref_count = 1; | |
5a9febac | 116 | memcpy(item->str, s, slen + 1); |
4400e98d | 117 | |
745129be MS |
118 | #ifdef DEBUG_GUARDS |
119 | item->guard = _CUPS_STR_GUARD; | |
120 | ||
e07d4801 MS |
121 | DEBUG_printf(("5_cupsStrAlloc: Created string %p(%s) for \"%s\", guard=%08x, " |
122 | "ref_count=%d", item, item->str, s, item->guard, | |
745129be MS |
123 | item->ref_count)); |
124 | #endif /* DEBUG_GUARDS */ | |
125 | ||
4400e98d | 126 | /* |
127 | * Add the string to the pool and return it... | |
128 | */ | |
129 | ||
d6ae789d | 130 | cupsArrayAdd(stringpool, item); |
131 | ||
6d2f911b | 132 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 133 | |
134 | return (item->str); | |
135 | } | |
136 | ||
137 | ||
554aa7b7 MS |
138 | /* |
139 | * '_cupsStrDate()' - Return a localized date for a given time value. | |
140 | * | |
141 | * This function works around the locale encoding issues of strftime... | |
142 | */ | |
143 | ||
144 | char * /* O - Buffer */ | |
145 | _cupsStrDate(char *buf, /* I - Buffer */ | |
146 | size_t bufsize, /* I - Size of buffer */ | |
147 | time_t timeval) /* I - Time value */ | |
148 | { | |
149 | struct tm *dateval; /* Local date/time */ | |
150 | char temp[1024]; /* Temporary buffer */ | |
151 | _cups_globals_t *cg = _cupsGlobals(); /* Per-thread globals */ | |
152 | ||
153 | ||
154 | if (!cg->lang_default) | |
155 | cg->lang_default = cupsLangDefault(); | |
156 | ||
157 | dateval = localtime(&timeval); | |
158 | ||
159 | if (cg->lang_default->encoding != CUPS_UTF8) | |
160 | { | |
161 | strftime(temp, sizeof(temp), "%c", dateval); | |
162 | cupsCharsetToUTF8((cups_utf8_t *)buf, temp, (int)bufsize, cg->lang_default->encoding); | |
163 | } | |
164 | else | |
165 | strftime(buf, bufsize, "%c", dateval); | |
166 | ||
167 | return (buf); | |
168 | } | |
169 | ||
170 | ||
4400e98d | 171 | /* |
426c6a59 | 172 | * '_cupsStrFlush()' - Flush the string pool. |
4400e98d | 173 | */ |
174 | ||
175 | void | |
d6ae789d | 176 | _cupsStrFlush(void) |
4400e98d | 177 | { |
178 | _cups_sp_item_t *item; /* Current item */ | |
179 | ||
180 | ||
e07d4801 | 181 | DEBUG_printf(("4_cupsStrFlush: %d strings in array", |
ae71f5de | 182 | cupsArrayCount(stringpool))); |
d6ae789d | 183 | |
6d2f911b | 184 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 185 | |
186 | for (item = (_cups_sp_item_t *)cupsArrayFirst(stringpool); | |
4400e98d | 187 | item; |
d6ae789d | 188 | item = (_cups_sp_item_t *)cupsArrayNext(stringpool)) |
4400e98d | 189 | free(item); |
4400e98d | 190 | |
d6ae789d | 191 | cupsArrayDelete(stringpool); |
192 | stringpool = NULL; | |
193 | ||
6d2f911b | 194 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 195 | } |
196 | ||
197 | ||
198 | /* | |
757d2cad | 199 | * '_cupsStrFormatd()' - Format a floating-point number. |
200 | */ | |
201 | ||
202 | char * /* O - Pointer to end of string */ | |
203 | _cupsStrFormatd(char *buf, /* I - String */ | |
204 | char *bufend, /* I - End of string buffer */ | |
205 | double number, /* I - Number to format */ | |
206 | struct lconv *loc) /* I - Locale data */ | |
207 | { | |
208 | char *bufptr, /* Pointer into buffer */ | |
209 | temp[1024], /* Temporary string */ | |
210 | *tempdec, /* Pointer to decimal point */ | |
211 | *tempptr; /* Pointer into temporary string */ | |
212 | const char *dec; /* Decimal point */ | |
213 | int declen; /* Length of decimal point */ | |
214 | ||
215 | ||
216 | /* | |
217 | * Format the number using the "%.12f" format and then eliminate | |
218 | * unnecessary trailing 0's. | |
219 | */ | |
220 | ||
221 | snprintf(temp, sizeof(temp), "%.12f", number); | |
222 | for (tempptr = temp + strlen(temp) - 1; | |
223 | tempptr > temp && *tempptr == '0'; | |
224 | *tempptr-- = '\0'); | |
225 | ||
226 | /* | |
227 | * Next, find the decimal point... | |
228 | */ | |
229 | ||
230 | if (loc && loc->decimal_point) | |
231 | { | |
232 | dec = loc->decimal_point; | |
b86bc4cf | 233 | declen = (int)strlen(dec); |
757d2cad | 234 | } |
235 | else | |
236 | { | |
237 | dec = "."; | |
238 | declen = 1; | |
239 | } | |
240 | ||
241 | if (declen == 1) | |
242 | tempdec = strchr(temp, *dec); | |
243 | else | |
244 | tempdec = strstr(temp, dec); | |
245 | ||
246 | /* | |
247 | * Copy everything up to the decimal point... | |
248 | */ | |
249 | ||
250 | if (tempdec) | |
251 | { | |
252 | for (tempptr = temp, bufptr = buf; | |
253 | tempptr < tempdec && bufptr < bufend; | |
254 | *bufptr++ = *tempptr++); | |
255 | ||
7594b224 | 256 | tempptr += declen; |
757d2cad | 257 | |
7594b224 | 258 | if (*tempptr && bufptr < bufend) |
757d2cad | 259 | { |
260 | *bufptr++ = '.'; | |
261 | ||
262 | while (*tempptr && bufptr < bufend) | |
263 | *bufptr++ = *tempptr++; | |
264 | } | |
265 | ||
266 | *bufptr = '\0'; | |
267 | } | |
268 | else | |
269 | { | |
07623986 | 270 | strlcpy(buf, temp, (size_t)(bufend - buf + 1)); |
757d2cad | 271 | bufptr = buf + strlen(buf); |
272 | } | |
273 | ||
274 | return (bufptr); | |
275 | } | |
276 | ||
277 | ||
278 | /* | |
279 | * '_cupsStrFree()' - Free/dereference a string. | |
4400e98d | 280 | */ |
281 | ||
282 | void | |
757d2cad | 283 | _cupsStrFree(const char *s) /* I - String to free */ |
4400e98d | 284 | { |
4400e98d | 285 | _cups_sp_item_t *item, /* String pool item */ |
426c6a59 | 286 | *key; /* Search key */ |
4400e98d | 287 | |
288 | ||
289 | /* | |
290 | * Range check input... | |
291 | */ | |
292 | ||
293 | if (!s) | |
294 | return; | |
295 | ||
296 | /* | |
d6ae789d | 297 | * Check the string pool... |
298 | * | |
299 | * We don't need to lock the mutex yet, as we only want to know if | |
300 | * the stringpool is initialized. The rest of the code will still | |
301 | * work if it is initialized before we lock... | |
4400e98d | 302 | */ |
303 | ||
d6ae789d | 304 | if (!stringpool) |
4400e98d | 305 | return; |
306 | ||
307 | /* | |
308 | * See if the string is already in the pool... | |
309 | */ | |
310 | ||
6d2f911b | 311 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 312 | |
745129be MS |
313 | key = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
314 | ||
426c6a59 MS |
315 | if ((item = (_cups_sp_item_t *)cupsArrayFind(stringpool, key)) != NULL && |
316 | item == key) | |
4400e98d | 317 | { |
318 | /* | |
319 | * Found it, dereference... | |
320 | */ | |
321 | ||
86c184ff MS |
322 | #ifdef DEBUG_GUARDS |
323 | if (key->guard != _CUPS_STR_GUARD) | |
324 | { | |
325 | DEBUG_printf(("5_cupsStrFree: Freeing string %p(%s), guard=%08x, ref_count=%d", key, key->str, key->guard, key->ref_count)); | |
326 | abort(); | |
327 | } | |
328 | #endif /* DEBUG_GUARDS */ | |
329 | ||
4400e98d | 330 | item->ref_count --; |
331 | ||
332 | if (!item->ref_count) | |
333 | { | |
334 | /* | |
335 | * Remove and free... | |
336 | */ | |
337 | ||
d6ae789d | 338 | cupsArrayRemove(stringpool, item); |
4400e98d | 339 | |
4400e98d | 340 | free(item); |
341 | } | |
342 | } | |
d6ae789d | 343 | |
6d2f911b | 344 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 345 | } |
346 | ||
347 | ||
426c6a59 MS |
348 | /* |
349 | * '_cupsStrRetain()' - Increment the reference count of a string. | |
350 | * | |
351 | * Note: This function does not verify that the passed pointer is in the | |
352 | * string pool, so any calls to it MUST know they are passing in a | |
353 | * good pointer. | |
354 | */ | |
355 | ||
356 | char * /* O - Pointer to string */ | |
e07d4801 | 357 | _cupsStrRetain(const char *s) /* I - String to retain */ |
426c6a59 MS |
358 | { |
359 | _cups_sp_item_t *item; /* Pointer to string pool item */ | |
360 | ||
361 | ||
362 | if (s) | |
363 | { | |
745129be MS |
364 | item = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
365 | ||
366 | #ifdef DEBUG_GUARDS | |
367 | if (item->guard != _CUPS_STR_GUARD) | |
368 | { | |
e07d4801 MS |
369 | DEBUG_printf(("5_cupsStrRetain: Retaining string %p(%s), guard=%08x, " |
370 | "ref_count=%d", item, s, item->guard, item->ref_count)); | |
745129be MS |
371 | abort(); |
372 | } | |
373 | #endif /* DEBUG_GUARDS */ | |
426c6a59 | 374 | |
6d2f911b | 375 | _cupsMutexLock(&sp_mutex); |
426c6a59 MS |
376 | |
377 | item->ref_count ++; | |
378 | ||
6d2f911b | 379 | _cupsMutexUnlock(&sp_mutex); |
426c6a59 MS |
380 | } |
381 | ||
e07d4801 | 382 | return ((char *)s); |
426c6a59 MS |
383 | } |
384 | ||
385 | ||
4400e98d | 386 | /* |
757d2cad | 387 | * '_cupsStrScand()' - Scan a string for a floating-point number. |
388 | * | |
389 | * This function handles the locale-specific BS so that a decimal | |
390 | * point is always the period (".")... | |
391 | */ | |
392 | ||
393 | double /* O - Number */ | |
394 | _cupsStrScand(const char *buf, /* I - Pointer to number */ | |
395 | char **bufptr, /* O - New pointer or NULL on error */ | |
396 | struct lconv *loc) /* I - Locale data */ | |
397 | { | |
398 | char temp[1024], /* Temporary buffer */ | |
399 | *tempptr; /* Pointer into temporary buffer */ | |
400 | ||
401 | ||
402 | /* | |
403 | * Range check input... | |
404 | */ | |
405 | ||
406 | if (!buf) | |
407 | return (0.0); | |
408 | ||
409 | /* | |
410 | * Skip leading whitespace... | |
411 | */ | |
412 | ||
7cf5915e | 413 | while (_cups_isspace(*buf)) |
757d2cad | 414 | buf ++; |
415 | ||
416 | /* | |
417 | * Copy leading sign, numbers, period, and then numbers... | |
418 | */ | |
419 | ||
420 | tempptr = temp; | |
421 | if (*buf == '-' || *buf == '+') | |
422 | *tempptr++ = *buf++; | |
423 | ||
424 | while (isdigit(*buf & 255)) | |
425 | if (tempptr < (temp + sizeof(temp) - 1)) | |
426 | *tempptr++ = *buf++; | |
427 | else | |
428 | { | |
429 | if (bufptr) | |
430 | *bufptr = NULL; | |
431 | ||
432 | return (0.0); | |
433 | } | |
434 | ||
435 | if (*buf == '.') | |
436 | { | |
e1d6a774 | 437 | /* |
438 | * Read fractional portion of number... | |
439 | */ | |
440 | ||
441 | buf ++; | |
442 | ||
757d2cad | 443 | if (loc && loc->decimal_point) |
444 | { | |
7e86f2f6 | 445 | strlcpy(tempptr, loc->decimal_point, sizeof(temp) - (size_t)(tempptr - temp)); |
757d2cad | 446 | tempptr += strlen(tempptr); |
447 | } | |
448 | else if (tempptr < (temp + sizeof(temp) - 1)) | |
449 | *tempptr++ = '.'; | |
450 | else | |
451 | { | |
452 | if (bufptr) | |
453 | *bufptr = NULL; | |
454 | ||
455 | return (0.0); | |
456 | } | |
457 | ||
458 | while (isdigit(*buf & 255)) | |
459 | if (tempptr < (temp + sizeof(temp) - 1)) | |
460 | *tempptr++ = *buf++; | |
461 | else | |
462 | { | |
463 | if (bufptr) | |
464 | *bufptr = NULL; | |
465 | ||
466 | return (0.0); | |
467 | } | |
468 | } | |
469 | ||
b86bc4cf | 470 | if (*buf == 'e' || *buf == 'E') |
471 | { | |
472 | /* | |
473 | * Read exponent... | |
474 | */ | |
475 | ||
476 | if (tempptr < (temp + sizeof(temp) - 1)) | |
477 | *tempptr++ = *buf++; | |
478 | else | |
479 | { | |
480 | if (bufptr) | |
481 | *bufptr = NULL; | |
482 | ||
483 | return (0.0); | |
484 | } | |
485 | ||
486 | if (*buf == '+' || *buf == '-') | |
487 | { | |
488 | if (tempptr < (temp + sizeof(temp) - 1)) | |
489 | *tempptr++ = *buf++; | |
490 | else | |
491 | { | |
492 | if (bufptr) | |
493 | *bufptr = NULL; | |
494 | ||
495 | return (0.0); | |
496 | } | |
497 | } | |
498 | ||
499 | while (isdigit(*buf & 255)) | |
500 | if (tempptr < (temp + sizeof(temp) - 1)) | |
501 | *tempptr++ = *buf++; | |
502 | else | |
503 | { | |
504 | if (bufptr) | |
505 | *bufptr = NULL; | |
506 | ||
507 | return (0.0); | |
508 | } | |
509 | } | |
510 | ||
757d2cad | 511 | /* |
512 | * Nul-terminate the temporary string and return the value... | |
513 | */ | |
514 | ||
515 | if (bufptr) | |
516 | *bufptr = (char *)buf; | |
517 | ||
518 | *tempptr = '\0'; | |
519 | ||
520 | return (strtod(temp, NULL)); | |
521 | } | |
522 | ||
523 | ||
524 | /* | |
525 | * '_cupsStrStatistics()' - Return allocation statistics for string pool. | |
4400e98d | 526 | */ |
527 | ||
528 | size_t /* O - Number of strings */ | |
757d2cad | 529 | _cupsStrStatistics(size_t *alloc_bytes, /* O - Allocated bytes */ |
530 | size_t *total_bytes) /* O - Total string bytes */ | |
4400e98d | 531 | { |
532 | size_t count, /* Number of strings */ | |
533 | abytes, /* Allocated string bytes */ | |
534 | tbytes, /* Total string bytes */ | |
535 | len; /* Length of string */ | |
536 | _cups_sp_item_t *item; /* Current item */ | |
4400e98d | 537 | |
538 | ||
539 | /* | |
540 | * Loop through strings in pool, counting everything up... | |
541 | */ | |
542 | ||
6d2f911b | 543 | _cupsMutexLock(&sp_mutex); |
4400e98d | 544 | |
545 | for (count = 0, abytes = 0, tbytes = 0, | |
d6ae789d | 546 | item = (_cups_sp_item_t *)cupsArrayFirst(stringpool); |
4400e98d | 547 | item; |
d6ae789d | 548 | item = (_cups_sp_item_t *)cupsArrayNext(stringpool)) |
4400e98d | 549 | { |
550 | /* | |
551 | * Count allocated memory, using a 64-bit aligned buffer as a basis. | |
552 | */ | |
553 | ||
554 | count += item->ref_count; | |
7e86f2f6 | 555 | len = (strlen(item->str) + 8) & (size_t)~7; |
4400e98d | 556 | abytes += sizeof(_cups_sp_item_t) + len; |
557 | tbytes += item->ref_count * len; | |
558 | } | |
559 | ||
6d2f911b | 560 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 561 | |
4400e98d | 562 | /* |
563 | * Return values... | |
564 | */ | |
565 | ||
566 | if (alloc_bytes) | |
567 | *alloc_bytes = abytes; | |
568 | ||
569 | if (total_bytes) | |
570 | *total_bytes = tbytes; | |
571 | ||
572 | return (count); | |
573 | } | |
ef416fc2 | 574 | |
575 | ||
576 | /* | |
577 | * '_cups_strcpy()' - Copy a string allowing for overlapping strings. | |
578 | */ | |
579 | ||
580 | void | |
581 | _cups_strcpy(char *dst, /* I - Destination string */ | |
88f9aafc | 582 | const char *src) /* I - Source string */ |
ef416fc2 | 583 | { |
584 | while (*src) | |
585 | *dst++ = *src++; | |
586 | ||
587 | *dst = '\0'; | |
588 | } | |
589 | ||
590 | ||
591 | /* | |
592 | * '_cups_strdup()' - Duplicate a string. | |
593 | */ | |
594 | ||
595 | #ifndef HAVE_STRDUP | |
596 | char * /* O - New string pointer */ | |
597 | _cups_strdup(const char *s) /* I - String to duplicate */ | |
598 | { | |
5a9febac MS |
599 | char *t; /* New string pointer */ |
600 | size_t slen; /* Length of string */ | |
ef416fc2 | 601 | |
602 | ||
5a9febac | 603 | if (!s) |
ef416fc2 | 604 | return (NULL); |
605 | ||
5a9febac MS |
606 | slen = strlen(s); |
607 | if ((t = malloc(slen + 1)) == NULL) | |
ef416fc2 | 608 | return (NULL); |
609 | ||
5a9febac | 610 | return (memcpy(t, s, slen + 1)); |
ef416fc2 | 611 | } |
612 | #endif /* !HAVE_STRDUP */ | |
613 | ||
614 | ||
615 | /* | |
616 | * '_cups_strcasecmp()' - Do a case-insensitive comparison. | |
617 | */ | |
618 | ||
ef416fc2 | 619 | int /* O - Result of comparison (-1, 0, or 1) */ |
620 | _cups_strcasecmp(const char *s, /* I - First string */ | |
88f9aafc | 621 | const char *t) /* I - Second string */ |
ef416fc2 | 622 | { |
623 | while (*s != '\0' && *t != '\0') | |
624 | { | |
88f9aafc | 625 | if (_cups_tolower(*s) < _cups_tolower(*t)) |
ef416fc2 | 626 | return (-1); |
88f9aafc | 627 | else if (_cups_tolower(*s) > _cups_tolower(*t)) |
ef416fc2 | 628 | return (1); |
629 | ||
630 | s ++; | |
631 | t ++; | |
632 | } | |
633 | ||
634 | if (*s == '\0' && *t == '\0') | |
635 | return (0); | |
636 | else if (*s != '\0') | |
637 | return (1); | |
638 | else | |
639 | return (-1); | |
640 | } | |
ef416fc2 | 641 | |
642 | /* | |
643 | * '_cups_strncasecmp()' - Do a case-insensitive comparison on up to N chars. | |
644 | */ | |
645 | ||
ef416fc2 | 646 | int /* O - Result of comparison (-1, 0, or 1) */ |
647 | _cups_strncasecmp(const char *s, /* I - First string */ | |
0a682745 | 648 | const char *t, /* I - Second string */ |
ef416fc2 | 649 | size_t n) /* I - Maximum number of characters to compare */ |
650 | { | |
651 | while (*s != '\0' && *t != '\0' && n > 0) | |
652 | { | |
88f9aafc | 653 | if (_cups_tolower(*s) < _cups_tolower(*t)) |
ef416fc2 | 654 | return (-1); |
88f9aafc | 655 | else if (_cups_tolower(*s) > _cups_tolower(*t)) |
ef416fc2 | 656 | return (1); |
657 | ||
658 | s ++; | |
659 | t ++; | |
660 | n --; | |
661 | } | |
662 | ||
663 | if (n == 0) | |
664 | return (0); | |
665 | else if (*s == '\0' && *t == '\0') | |
666 | return (0); | |
667 | else if (*s != '\0') | |
668 | return (1); | |
669 | else | |
670 | return (-1); | |
671 | } | |
ef416fc2 | 672 | |
673 | ||
674 | #ifndef HAVE_STRLCAT | |
675 | /* | |
676 | * '_cups_strlcat()' - Safely concatenate two strings. | |
677 | */ | |
678 | ||
679 | size_t /* O - Length of string */ | |
680 | _cups_strlcat(char *dst, /* O - Destination string */ | |
681 | const char *src, /* I - Source string */ | |
682 | size_t size) /* I - Size of destination string buffer */ | |
683 | { | |
684 | size_t srclen; /* Length of source string */ | |
685 | size_t dstlen; /* Length of destination string */ | |
686 | ||
687 | ||
688 | /* | |
689 | * Figure out how much room is left... | |
690 | */ | |
691 | ||
692 | dstlen = strlen(dst); | |
ef416fc2 | 693 | |
e38ab40b MS |
694 | if (size < (dstlen + 1)) |
695 | return (dstlen); /* No room, return immediately... */ | |
696 | ||
697 | size -= dstlen + 1; | |
ef416fc2 | 698 | |
699 | /* | |
700 | * Figure out how much room is needed... | |
701 | */ | |
702 | ||
703 | srclen = strlen(src); | |
704 | ||
705 | /* | |
706 | * Copy the appropriate amount... | |
707 | */ | |
708 | ||
709 | if (srclen > size) | |
710 | srclen = size; | |
711 | ||
7e86f2f6 | 712 | memmove(dst + dstlen, src, srclen); |
ef416fc2 | 713 | dst[dstlen + srclen] = '\0'; |
714 | ||
715 | return (dstlen + srclen); | |
716 | } | |
717 | #endif /* !HAVE_STRLCAT */ | |
718 | ||
719 | ||
720 | #ifndef HAVE_STRLCPY | |
721 | /* | |
722 | * '_cups_strlcpy()' - Safely copy two strings. | |
723 | */ | |
724 | ||
725 | size_t /* O - Length of string */ | |
726 | _cups_strlcpy(char *dst, /* O - Destination string */ | |
727 | const char *src, /* I - Source string */ | |
728 | size_t size) /* I - Size of destination string buffer */ | |
729 | { | |
730 | size_t srclen; /* Length of source string */ | |
731 | ||
732 | ||
733 | /* | |
734 | * Figure out how much room is needed... | |
735 | */ | |
736 | ||
737 | size --; | |
738 | ||
739 | srclen = strlen(src); | |
740 | ||
741 | /* | |
742 | * Copy the appropriate amount... | |
743 | */ | |
744 | ||
745 | if (srclen > size) | |
746 | srclen = size; | |
747 | ||
7e86f2f6 | 748 | memmove(dst, src, srclen); |
ef416fc2 | 749 | dst[srclen] = '\0'; |
750 | ||
751 | return (srclen); | |
752 | } | |
753 | #endif /* !HAVE_STRLCPY */ | |
754 | ||
755 | ||
756 | /* | |
4400e98d | 757 | * 'compare_sp_items()' - Compare two string pool items... |
758 | */ | |
759 | ||
760 | static int /* O - Result of comparison */ | |
761 | compare_sp_items(_cups_sp_item_t *a, /* I - First item */ | |
762 | _cups_sp_item_t *b) /* I - Second item */ | |
763 | { | |
764 | return (strcmp(a->str, b->str)); | |
765 | } |