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Commit | Line | Data |
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ef416fc2 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
ef416fc2 | 3 | * |
7e86f2f6 | 4 | * String functions for CUPS. |
ef416fc2 | 5 | * |
7e86f2f6 MS |
6 | * Copyright 2007-2014 by Apple Inc. |
7 | * Copyright 1997-2007 by Easy Software Products. | |
ef416fc2 | 8 | * |
7e86f2f6 MS |
9 | * These coded instructions, statements, and computer programs are the |
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 | * |
7e86f2f6 | 15 | * This file is subject to the Apple OS-Developed Software exception. |
ef416fc2 | 16 | */ |
17 | ||
18 | /* | |
19 | * Include necessary headers... | |
20 | */ | |
21 | ||
7cf5915e | 22 | #define _CUPS_STRING_C_ |
71e16022 MS |
23 | #include "string-private.h" |
24 | #include "debug-private.h" | |
6d2f911b | 25 | #include "thread-private.h" |
71e16022 | 26 | #include "array.h" |
745129be | 27 | #include <stddef.h> |
4400e98d | 28 | #include <limits.h> |
d6ae789d | 29 | |
30 | ||
31 | /* | |
32 | * Local globals... | |
33 | */ | |
34 | ||
6d2f911b | 35 | static _cups_mutex_t sp_mutex = _CUPS_MUTEX_INITIALIZER; |
d6ae789d | 36 | /* Mutex to control access to pool */ |
d6ae789d | 37 | static cups_array_t *stringpool = NULL; |
38 | /* Global string pool */ | |
4400e98d | 39 | |
40 | ||
41 | /* | |
42 | * Local functions... | |
43 | */ | |
44 | ||
45 | static int compare_sp_items(_cups_sp_item_t *a, _cups_sp_item_t *b); | |
46 | ||
47 | ||
48 | /* | |
757d2cad | 49 | * '_cupsStrAlloc()' - Allocate/reference a string. |
4400e98d | 50 | */ |
51 | ||
52 | char * /* O - String pointer */ | |
757d2cad | 53 | _cupsStrAlloc(const char *s) /* I - String */ |
4400e98d | 54 | { |
5a9febac | 55 | size_t slen; /* Length of string */ |
4400e98d | 56 | _cups_sp_item_t *item, /* String pool item */ |
426c6a59 | 57 | *key; /* Search key */ |
4400e98d | 58 | |
59 | ||
60 | /* | |
61 | * Range check input... | |
62 | */ | |
63 | ||
64 | if (!s) | |
65 | return (NULL); | |
66 | ||
67 | /* | |
68 | * Get the string pool... | |
69 | */ | |
70 | ||
6d2f911b | 71 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 72 | |
73 | if (!stringpool) | |
74 | stringpool = cupsArrayNew((cups_array_func_t)compare_sp_items, NULL); | |
4400e98d | 75 | |
d6ae789d | 76 | if (!stringpool) |
77 | { | |
6d2f911b | 78 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 79 | |
4400e98d | 80 | return (NULL); |
d6ae789d | 81 | } |
4400e98d | 82 | |
83 | /* | |
84 | * See if the string is already in the pool... | |
85 | */ | |
86 | ||
745129be | 87 | key = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
4400e98d | 88 | |
426c6a59 | 89 | if ((item = (_cups_sp_item_t *)cupsArrayFind(stringpool, key)) != NULL) |
4400e98d | 90 | { |
91 | /* | |
92 | * Found it, return the cached string... | |
93 | */ | |
94 | ||
95 | item->ref_count ++; | |
96 | ||
745129be | 97 | #ifdef DEBUG_GUARDS |
e07d4801 MS |
98 | DEBUG_printf(("5_cupsStrAlloc: Using string %p(%s) for \"%s\", guard=%08x, " |
99 | "ref_count=%d", item, item->str, s, item->guard, | |
745129be MS |
100 | item->ref_count)); |
101 | ||
102 | if (item->guard != _CUPS_STR_GUARD) | |
103 | abort(); | |
104 | #endif /* DEBUG_GUARDS */ | |
105 | ||
6d2f911b | 106 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 107 | |
4400e98d | 108 | return (item->str); |
109 | } | |
110 | ||
111 | /* | |
112 | * Not found, so allocate a new one... | |
113 | */ | |
114 | ||
5a9febac MS |
115 | slen = strlen(s); |
116 | item = (_cups_sp_item_t *)calloc(1, sizeof(_cups_sp_item_t) + slen); | |
4400e98d | 117 | if (!item) |
d6ae789d | 118 | { |
6d2f911b | 119 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 120 | |
4400e98d | 121 | return (NULL); |
d6ae789d | 122 | } |
4400e98d | 123 | |
124 | item->ref_count = 1; | |
5a9febac | 125 | memcpy(item->str, s, slen + 1); |
4400e98d | 126 | |
745129be MS |
127 | #ifdef DEBUG_GUARDS |
128 | item->guard = _CUPS_STR_GUARD; | |
129 | ||
e07d4801 MS |
130 | DEBUG_printf(("5_cupsStrAlloc: Created string %p(%s) for \"%s\", guard=%08x, " |
131 | "ref_count=%d", item, item->str, s, item->guard, | |
745129be MS |
132 | item->ref_count)); |
133 | #endif /* DEBUG_GUARDS */ | |
134 | ||
4400e98d | 135 | /* |
136 | * Add the string to the pool and return it... | |
137 | */ | |
138 | ||
d6ae789d | 139 | cupsArrayAdd(stringpool, item); |
140 | ||
6d2f911b | 141 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 142 | |
143 | return (item->str); | |
144 | } | |
145 | ||
146 | ||
147 | /* | |
426c6a59 | 148 | * '_cupsStrFlush()' - Flush the string pool. |
4400e98d | 149 | */ |
150 | ||
151 | void | |
d6ae789d | 152 | _cupsStrFlush(void) |
4400e98d | 153 | { |
154 | _cups_sp_item_t *item; /* Current item */ | |
155 | ||
156 | ||
e07d4801 | 157 | DEBUG_printf(("4_cupsStrFlush: %d strings in array", |
ae71f5de | 158 | cupsArrayCount(stringpool))); |
d6ae789d | 159 | |
6d2f911b | 160 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 161 | |
162 | for (item = (_cups_sp_item_t *)cupsArrayFirst(stringpool); | |
4400e98d | 163 | item; |
d6ae789d | 164 | item = (_cups_sp_item_t *)cupsArrayNext(stringpool)) |
4400e98d | 165 | free(item); |
4400e98d | 166 | |
d6ae789d | 167 | cupsArrayDelete(stringpool); |
168 | stringpool = NULL; | |
169 | ||
6d2f911b | 170 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 171 | } |
172 | ||
173 | ||
174 | /* | |
757d2cad | 175 | * '_cupsStrFormatd()' - Format a floating-point number. |
176 | */ | |
177 | ||
178 | char * /* O - Pointer to end of string */ | |
179 | _cupsStrFormatd(char *buf, /* I - String */ | |
180 | char *bufend, /* I - End of string buffer */ | |
181 | double number, /* I - Number to format */ | |
182 | struct lconv *loc) /* I - Locale data */ | |
183 | { | |
184 | char *bufptr, /* Pointer into buffer */ | |
185 | temp[1024], /* Temporary string */ | |
186 | *tempdec, /* Pointer to decimal point */ | |
187 | *tempptr; /* Pointer into temporary string */ | |
188 | const char *dec; /* Decimal point */ | |
189 | int declen; /* Length of decimal point */ | |
190 | ||
191 | ||
192 | /* | |
193 | * Format the number using the "%.12f" format and then eliminate | |
194 | * unnecessary trailing 0's. | |
195 | */ | |
196 | ||
197 | snprintf(temp, sizeof(temp), "%.12f", number); | |
198 | for (tempptr = temp + strlen(temp) - 1; | |
199 | tempptr > temp && *tempptr == '0'; | |
200 | *tempptr-- = '\0'); | |
201 | ||
202 | /* | |
203 | * Next, find the decimal point... | |
204 | */ | |
205 | ||
206 | if (loc && loc->decimal_point) | |
207 | { | |
208 | dec = loc->decimal_point; | |
b86bc4cf | 209 | declen = (int)strlen(dec); |
757d2cad | 210 | } |
211 | else | |
212 | { | |
213 | dec = "."; | |
214 | declen = 1; | |
215 | } | |
216 | ||
217 | if (declen == 1) | |
218 | tempdec = strchr(temp, *dec); | |
219 | else | |
220 | tempdec = strstr(temp, dec); | |
221 | ||
222 | /* | |
223 | * Copy everything up to the decimal point... | |
224 | */ | |
225 | ||
226 | if (tempdec) | |
227 | { | |
228 | for (tempptr = temp, bufptr = buf; | |
229 | tempptr < tempdec && bufptr < bufend; | |
230 | *bufptr++ = *tempptr++); | |
231 | ||
7594b224 | 232 | tempptr += declen; |
757d2cad | 233 | |
7594b224 | 234 | if (*tempptr && bufptr < bufend) |
757d2cad | 235 | { |
236 | *bufptr++ = '.'; | |
237 | ||
238 | while (*tempptr && bufptr < bufend) | |
239 | *bufptr++ = *tempptr++; | |
240 | } | |
241 | ||
242 | *bufptr = '\0'; | |
243 | } | |
244 | else | |
245 | { | |
246 | strlcpy(buf, temp, bufend - buf + 1); | |
247 | bufptr = buf + strlen(buf); | |
248 | } | |
249 | ||
250 | return (bufptr); | |
251 | } | |
252 | ||
253 | ||
254 | /* | |
255 | * '_cupsStrFree()' - Free/dereference a string. | |
4400e98d | 256 | */ |
257 | ||
258 | void | |
757d2cad | 259 | _cupsStrFree(const char *s) /* I - String to free */ |
4400e98d | 260 | { |
4400e98d | 261 | _cups_sp_item_t *item, /* String pool item */ |
426c6a59 | 262 | *key; /* Search key */ |
4400e98d | 263 | |
264 | ||
265 | /* | |
266 | * Range check input... | |
267 | */ | |
268 | ||
269 | if (!s) | |
270 | return; | |
271 | ||
272 | /* | |
d6ae789d | 273 | * Check the string pool... |
274 | * | |
275 | * We don't need to lock the mutex yet, as we only want to know if | |
276 | * the stringpool is initialized. The rest of the code will still | |
277 | * work if it is initialized before we lock... | |
4400e98d | 278 | */ |
279 | ||
d6ae789d | 280 | if (!stringpool) |
4400e98d | 281 | return; |
282 | ||
283 | /* | |
284 | * See if the string is already in the pool... | |
285 | */ | |
286 | ||
6d2f911b | 287 | _cupsMutexLock(&sp_mutex); |
d6ae789d | 288 | |
745129be MS |
289 | key = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
290 | ||
291 | #ifdef DEBUG_GUARDS | |
292 | if (key->guard != _CUPS_STR_GUARD) | |
293 | { | |
e07d4801 MS |
294 | DEBUG_printf(("5_cupsStrFree: Freeing string %p(%s), guard=%08x, " |
295 | "ref_count=%d", key, key->str, key->guard, key->ref_count)); | |
745129be MS |
296 | abort(); |
297 | } | |
298 | #endif /* DEBUG_GUARDS */ | |
4400e98d | 299 | |
426c6a59 MS |
300 | if ((item = (_cups_sp_item_t *)cupsArrayFind(stringpool, key)) != NULL && |
301 | item == key) | |
4400e98d | 302 | { |
303 | /* | |
304 | * Found it, dereference... | |
305 | */ | |
306 | ||
307 | item->ref_count --; | |
308 | ||
309 | if (!item->ref_count) | |
310 | { | |
311 | /* | |
312 | * Remove and free... | |
313 | */ | |
314 | ||
d6ae789d | 315 | cupsArrayRemove(stringpool, item); |
4400e98d | 316 | |
4400e98d | 317 | free(item); |
318 | } | |
319 | } | |
d6ae789d | 320 | |
6d2f911b | 321 | _cupsMutexUnlock(&sp_mutex); |
4400e98d | 322 | } |
323 | ||
324 | ||
426c6a59 MS |
325 | /* |
326 | * '_cupsStrRetain()' - Increment the reference count of a string. | |
327 | * | |
328 | * Note: This function does not verify that the passed pointer is in the | |
329 | * string pool, so any calls to it MUST know they are passing in a | |
330 | * good pointer. | |
331 | */ | |
332 | ||
333 | char * /* O - Pointer to string */ | |
e07d4801 | 334 | _cupsStrRetain(const char *s) /* I - String to retain */ |
426c6a59 MS |
335 | { |
336 | _cups_sp_item_t *item; /* Pointer to string pool item */ | |
337 | ||
338 | ||
339 | if (s) | |
340 | { | |
745129be MS |
341 | item = (_cups_sp_item_t *)(s - offsetof(_cups_sp_item_t, str)); |
342 | ||
343 | #ifdef DEBUG_GUARDS | |
344 | if (item->guard != _CUPS_STR_GUARD) | |
345 | { | |
e07d4801 MS |
346 | DEBUG_printf(("5_cupsStrRetain: Retaining string %p(%s), guard=%08x, " |
347 | "ref_count=%d", item, s, item->guard, item->ref_count)); | |
745129be MS |
348 | abort(); |
349 | } | |
350 | #endif /* DEBUG_GUARDS */ | |
426c6a59 | 351 | |
6d2f911b | 352 | _cupsMutexLock(&sp_mutex); |
426c6a59 MS |
353 | |
354 | item->ref_count ++; | |
355 | ||
6d2f911b | 356 | _cupsMutexUnlock(&sp_mutex); |
426c6a59 MS |
357 | } |
358 | ||
e07d4801 | 359 | return ((char *)s); |
426c6a59 MS |
360 | } |
361 | ||
362 | ||
4400e98d | 363 | /* |
757d2cad | 364 | * '_cupsStrScand()' - Scan a string for a floating-point number. |
365 | * | |
366 | * This function handles the locale-specific BS so that a decimal | |
367 | * point is always the period (".")... | |
368 | */ | |
369 | ||
370 | double /* O - Number */ | |
371 | _cupsStrScand(const char *buf, /* I - Pointer to number */ | |
372 | char **bufptr, /* O - New pointer or NULL on error */ | |
373 | struct lconv *loc) /* I - Locale data */ | |
374 | { | |
375 | char temp[1024], /* Temporary buffer */ | |
376 | *tempptr; /* Pointer into temporary buffer */ | |
377 | ||
378 | ||
379 | /* | |
380 | * Range check input... | |
381 | */ | |
382 | ||
383 | if (!buf) | |
384 | return (0.0); | |
385 | ||
386 | /* | |
387 | * Skip leading whitespace... | |
388 | */ | |
389 | ||
7cf5915e | 390 | while (_cups_isspace(*buf)) |
757d2cad | 391 | buf ++; |
392 | ||
393 | /* | |
394 | * Copy leading sign, numbers, period, and then numbers... | |
395 | */ | |
396 | ||
397 | tempptr = temp; | |
398 | if (*buf == '-' || *buf == '+') | |
399 | *tempptr++ = *buf++; | |
400 | ||
401 | while (isdigit(*buf & 255)) | |
402 | if (tempptr < (temp + sizeof(temp) - 1)) | |
403 | *tempptr++ = *buf++; | |
404 | else | |
405 | { | |
406 | if (bufptr) | |
407 | *bufptr = NULL; | |
408 | ||
409 | return (0.0); | |
410 | } | |
411 | ||
412 | if (*buf == '.') | |
413 | { | |
e1d6a774 | 414 | /* |
415 | * Read fractional portion of number... | |
416 | */ | |
417 | ||
418 | buf ++; | |
419 | ||
757d2cad | 420 | if (loc && loc->decimal_point) |
421 | { | |
7e86f2f6 | 422 | strlcpy(tempptr, loc->decimal_point, sizeof(temp) - (size_t)(tempptr - temp)); |
757d2cad | 423 | tempptr += strlen(tempptr); |
424 | } | |
425 | else if (tempptr < (temp + sizeof(temp) - 1)) | |
426 | *tempptr++ = '.'; | |
427 | else | |
428 | { | |
429 | if (bufptr) | |
430 | *bufptr = NULL; | |
431 | ||
432 | return (0.0); | |
433 | } | |
434 | ||
435 | while (isdigit(*buf & 255)) | |
436 | if (tempptr < (temp + sizeof(temp) - 1)) | |
437 | *tempptr++ = *buf++; | |
438 | else | |
439 | { | |
440 | if (bufptr) | |
441 | *bufptr = NULL; | |
442 | ||
443 | return (0.0); | |
444 | } | |
445 | } | |
446 | ||
b86bc4cf | 447 | if (*buf == 'e' || *buf == 'E') |
448 | { | |
449 | /* | |
450 | * Read exponent... | |
451 | */ | |
452 | ||
453 | if (tempptr < (temp + sizeof(temp) - 1)) | |
454 | *tempptr++ = *buf++; | |
455 | else | |
456 | { | |
457 | if (bufptr) | |
458 | *bufptr = NULL; | |
459 | ||
460 | return (0.0); | |
461 | } | |
462 | ||
463 | if (*buf == '+' || *buf == '-') | |
464 | { | |
465 | if (tempptr < (temp + sizeof(temp) - 1)) | |
466 | *tempptr++ = *buf++; | |
467 | else | |
468 | { | |
469 | if (bufptr) | |
470 | *bufptr = NULL; | |
471 | ||
472 | return (0.0); | |
473 | } | |
474 | } | |
475 | ||
476 | while (isdigit(*buf & 255)) | |
477 | if (tempptr < (temp + sizeof(temp) - 1)) | |
478 | *tempptr++ = *buf++; | |
479 | else | |
480 | { | |
481 | if (bufptr) | |
482 | *bufptr = NULL; | |
483 | ||
484 | return (0.0); | |
485 | } | |
486 | } | |
487 | ||
757d2cad | 488 | /* |
489 | * Nul-terminate the temporary string and return the value... | |
490 | */ | |
491 | ||
492 | if (bufptr) | |
493 | *bufptr = (char *)buf; | |
494 | ||
495 | *tempptr = '\0'; | |
496 | ||
497 | return (strtod(temp, NULL)); | |
498 | } | |
499 | ||
500 | ||
501 | /* | |
502 | * '_cupsStrStatistics()' - Return allocation statistics for string pool. | |
4400e98d | 503 | */ |
504 | ||
505 | size_t /* O - Number of strings */ | |
757d2cad | 506 | _cupsStrStatistics(size_t *alloc_bytes, /* O - Allocated bytes */ |
507 | size_t *total_bytes) /* O - Total string bytes */ | |
4400e98d | 508 | { |
509 | size_t count, /* Number of strings */ | |
510 | abytes, /* Allocated string bytes */ | |
511 | tbytes, /* Total string bytes */ | |
512 | len; /* Length of string */ | |
513 | _cups_sp_item_t *item; /* Current item */ | |
4400e98d | 514 | |
515 | ||
516 | /* | |
517 | * Loop through strings in pool, counting everything up... | |
518 | */ | |
519 | ||
6d2f911b | 520 | _cupsMutexLock(&sp_mutex); |
4400e98d | 521 | |
522 | for (count = 0, abytes = 0, tbytes = 0, | |
d6ae789d | 523 | item = (_cups_sp_item_t *)cupsArrayFirst(stringpool); |
4400e98d | 524 | item; |
d6ae789d | 525 | item = (_cups_sp_item_t *)cupsArrayNext(stringpool)) |
4400e98d | 526 | { |
527 | /* | |
528 | * Count allocated memory, using a 64-bit aligned buffer as a basis. | |
529 | */ | |
530 | ||
531 | count += item->ref_count; | |
7e86f2f6 | 532 | len = (strlen(item->str) + 8) & (size_t)~7; |
4400e98d | 533 | abytes += sizeof(_cups_sp_item_t) + len; |
534 | tbytes += item->ref_count * len; | |
535 | } | |
536 | ||
6d2f911b | 537 | _cupsMutexUnlock(&sp_mutex); |
d6ae789d | 538 | |
4400e98d | 539 | /* |
540 | * Return values... | |
541 | */ | |
542 | ||
543 | if (alloc_bytes) | |
544 | *alloc_bytes = abytes; | |
545 | ||
546 | if (total_bytes) | |
547 | *total_bytes = tbytes; | |
548 | ||
549 | return (count); | |
550 | } | |
ef416fc2 | 551 | |
552 | ||
553 | /* | |
554 | * '_cups_strcpy()' - Copy a string allowing for overlapping strings. | |
555 | */ | |
556 | ||
557 | void | |
558 | _cups_strcpy(char *dst, /* I - Destination string */ | |
88f9aafc | 559 | const char *src) /* I - Source string */ |
ef416fc2 | 560 | { |
561 | while (*src) | |
562 | *dst++ = *src++; | |
563 | ||
564 | *dst = '\0'; | |
565 | } | |
566 | ||
567 | ||
568 | /* | |
569 | * '_cups_strdup()' - Duplicate a string. | |
570 | */ | |
571 | ||
572 | #ifndef HAVE_STRDUP | |
573 | char * /* O - New string pointer */ | |
574 | _cups_strdup(const char *s) /* I - String to duplicate */ | |
575 | { | |
5a9febac MS |
576 | char *t; /* New string pointer */ |
577 | size_t slen; /* Length of string */ | |
ef416fc2 | 578 | |
579 | ||
5a9febac | 580 | if (!s) |
ef416fc2 | 581 | return (NULL); |
582 | ||
5a9febac MS |
583 | slen = strlen(s); |
584 | if ((t = malloc(slen + 1)) == NULL) | |
ef416fc2 | 585 | return (NULL); |
586 | ||
5a9febac | 587 | return (memcpy(t, s, slen + 1)); |
ef416fc2 | 588 | } |
589 | #endif /* !HAVE_STRDUP */ | |
590 | ||
591 | ||
592 | /* | |
593 | * '_cups_strcasecmp()' - Do a case-insensitive comparison. | |
594 | */ | |
595 | ||
ef416fc2 | 596 | int /* O - Result of comparison (-1, 0, or 1) */ |
597 | _cups_strcasecmp(const char *s, /* I - First string */ | |
88f9aafc | 598 | const char *t) /* I - Second string */ |
ef416fc2 | 599 | { |
600 | while (*s != '\0' && *t != '\0') | |
601 | { | |
88f9aafc | 602 | if (_cups_tolower(*s) < _cups_tolower(*t)) |
ef416fc2 | 603 | return (-1); |
88f9aafc | 604 | else if (_cups_tolower(*s) > _cups_tolower(*t)) |
ef416fc2 | 605 | return (1); |
606 | ||
607 | s ++; | |
608 | t ++; | |
609 | } | |
610 | ||
611 | if (*s == '\0' && *t == '\0') | |
612 | return (0); | |
613 | else if (*s != '\0') | |
614 | return (1); | |
615 | else | |
616 | return (-1); | |
617 | } | |
ef416fc2 | 618 | |
619 | /* | |
620 | * '_cups_strncasecmp()' - Do a case-insensitive comparison on up to N chars. | |
621 | */ | |
622 | ||
ef416fc2 | 623 | int /* O - Result of comparison (-1, 0, or 1) */ |
624 | _cups_strncasecmp(const char *s, /* I - First string */ | |
0a682745 | 625 | const char *t, /* I - Second string */ |
ef416fc2 | 626 | size_t n) /* I - Maximum number of characters to compare */ |
627 | { | |
628 | while (*s != '\0' && *t != '\0' && n > 0) | |
629 | { | |
88f9aafc | 630 | if (_cups_tolower(*s) < _cups_tolower(*t)) |
ef416fc2 | 631 | return (-1); |
88f9aafc | 632 | else if (_cups_tolower(*s) > _cups_tolower(*t)) |
ef416fc2 | 633 | return (1); |
634 | ||
635 | s ++; | |
636 | t ++; | |
637 | n --; | |
638 | } | |
639 | ||
640 | if (n == 0) | |
641 | return (0); | |
642 | else if (*s == '\0' && *t == '\0') | |
643 | return (0); | |
644 | else if (*s != '\0') | |
645 | return (1); | |
646 | else | |
647 | return (-1); | |
648 | } | |
ef416fc2 | 649 | |
650 | ||
651 | #ifndef HAVE_STRLCAT | |
652 | /* | |
653 | * '_cups_strlcat()' - Safely concatenate two strings. | |
654 | */ | |
655 | ||
656 | size_t /* O - Length of string */ | |
657 | _cups_strlcat(char *dst, /* O - Destination string */ | |
658 | const char *src, /* I - Source string */ | |
659 | size_t size) /* I - Size of destination string buffer */ | |
660 | { | |
661 | size_t srclen; /* Length of source string */ | |
662 | size_t dstlen; /* Length of destination string */ | |
663 | ||
664 | ||
665 | /* | |
666 | * Figure out how much room is left... | |
667 | */ | |
668 | ||
669 | dstlen = strlen(dst); | |
670 | size -= dstlen + 1; | |
671 | ||
672 | if (!size) | |
673 | return (dstlen); /* No room, return immediately... */ | |
674 | ||
675 | /* | |
676 | * Figure out how much room is needed... | |
677 | */ | |
678 | ||
679 | srclen = strlen(src); | |
680 | ||
681 | /* | |
682 | * Copy the appropriate amount... | |
683 | */ | |
684 | ||
685 | if (srclen > size) | |
686 | srclen = size; | |
687 | ||
7e86f2f6 | 688 | memmove(dst + dstlen, src, srclen); |
ef416fc2 | 689 | dst[dstlen + srclen] = '\0'; |
690 | ||
691 | return (dstlen + srclen); | |
692 | } | |
693 | #endif /* !HAVE_STRLCAT */ | |
694 | ||
695 | ||
696 | #ifndef HAVE_STRLCPY | |
697 | /* | |
698 | * '_cups_strlcpy()' - Safely copy two strings. | |
699 | */ | |
700 | ||
701 | size_t /* O - Length of string */ | |
702 | _cups_strlcpy(char *dst, /* O - Destination string */ | |
703 | const char *src, /* I - Source string */ | |
704 | size_t size) /* I - Size of destination string buffer */ | |
705 | { | |
706 | size_t srclen; /* Length of source string */ | |
707 | ||
708 | ||
709 | /* | |
710 | * Figure out how much room is needed... | |
711 | */ | |
712 | ||
713 | size --; | |
714 | ||
715 | srclen = strlen(src); | |
716 | ||
717 | /* | |
718 | * Copy the appropriate amount... | |
719 | */ | |
720 | ||
721 | if (srclen > size) | |
722 | srclen = size; | |
723 | ||
7e86f2f6 | 724 | memmove(dst, src, srclen); |
ef416fc2 | 725 | dst[srclen] = '\0'; |
726 | ||
727 | return (srclen); | |
728 | } | |
729 | #endif /* !HAVE_STRLCPY */ | |
730 | ||
731 | ||
732 | /* | |
4400e98d | 733 | * 'compare_sp_items()' - Compare two string pool items... |
734 | */ | |
735 | ||
736 | static int /* O - Result of comparison */ | |
737 | compare_sp_items(_cups_sp_item_t *a, /* I - First item */ | |
738 | _cups_sp_item_t *b) /* I - Second item */ | |
739 | { | |
740 | return (strcmp(a->str, b->str)); | |
741 | } | |
742 | ||
743 | ||
744 | /* | |
f2d18633 | 745 | * End of "$Id$". |
ef416fc2 | 746 | */ |