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Commit | Line | Data |
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ef416fc2 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
ef416fc2 | 3 | * |
f8b3a85b | 4 | * Option routines for CUPS. |
ef416fc2 | 5 | * |
f3c17241 | 6 | * Copyright 2007-2012 by Apple Inc. |
f7deaa1a | 7 | * Copyright 1997-2007 by Easy Software Products. |
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 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
f8b3a85b MS |
19 | * cupsAddOption() - Add an option to an option array. |
20 | * cupsFreeOptions() - Free all memory used by options. | |
21 | * cupsGetOption() - Get an option value. | |
22 | * cupsParseOptions() - Parse options from a command-line argument. | |
23 | * cupsRemoveOption() - Remove an option from an option array. | |
24 | * _cupsGet1284Values() - Get 1284 device ID keys and values. | |
25 | * cups_compare_options() - Compare two options. | |
26 | * cups_find_option() - Find an option using a binary search. | |
ef416fc2 | 27 | */ |
28 | ||
29 | /* | |
30 | * Include necessary headers... | |
31 | */ | |
32 | ||
7cf5915e | 33 | #include "cups-private.h" |
ef416fc2 | 34 | |
35 | ||
426c6a59 MS |
36 | /* |
37 | * Local functions... | |
38 | */ | |
39 | ||
40 | static int cups_compare_options(cups_option_t *a, cups_option_t *b); | |
41 | static int cups_find_option(const char *name, int num_options, | |
42 | cups_option_t *option, int prev, int *rdiff); | |
43 | ||
44 | ||
ef416fc2 | 45 | /* |
46 | * 'cupsAddOption()' - Add an option to an option array. | |
5a738aea MS |
47 | * |
48 | * New option arrays can be initialized simply by passing 0 for the | |
49 | * "num_options" parameter. | |
ef416fc2 | 50 | */ |
51 | ||
5a738aea MS |
52 | int /* O - Number of options */ |
53 | cupsAddOption(const char *name, /* I - Name of option */ | |
54 | const char *value, /* I - Value of option */ | |
55 | int num_options,/* I - Number of options */ | |
ef416fc2 | 56 | cups_option_t **options) /* IO - Pointer to options */ |
57 | { | |
ef416fc2 | 58 | cups_option_t *temp; /* Pointer to new option */ |
426c6a59 MS |
59 | int insert, /* Insertion point */ |
60 | diff; /* Result of search */ | |
ef416fc2 | 61 | |
62 | ||
f11a948a | 63 | DEBUG_printf(("2cupsAddOption(name=\"%s\", value=\"%s\", num_options=%d, " |
e07d4801 | 64 | "options=%p)", name, value, num_options, options)); |
88f9aafc | 65 | |
20fbc903 MS |
66 | if (!name || !name[0] || !value || !options || num_options < 0) |
67 | { | |
f11a948a | 68 | DEBUG_printf(("3cupsAddOption: Returning %d", num_options)); |
ef416fc2 | 69 | return (num_options); |
20fbc903 | 70 | } |
ef416fc2 | 71 | |
72 | /* | |
73 | * Look for an existing option with the same name... | |
74 | */ | |
75 | ||
426c6a59 MS |
76 | if (num_options == 0) |
77 | { | |
78 | insert = 0; | |
79 | diff = 1; | |
80 | } | |
81 | else | |
82 | { | |
83 | insert = cups_find_option(name, num_options, *options, num_options - 1, | |
84 | &diff); | |
ef416fc2 | 85 | |
426c6a59 MS |
86 | if (diff > 0) |
87 | insert ++; | |
88 | } | |
89 | ||
90 | if (diff) | |
ef416fc2 | 91 | { |
92 | /* | |
93 | * No matching option name... | |
94 | */ | |
95 | ||
f11a948a | 96 | DEBUG_printf(("4cupsAddOption: New option inserted at index %d...", |
426c6a59 | 97 | insert)); |
20fbc903 | 98 | |
ef416fc2 | 99 | if (num_options == 0) |
100 | temp = (cups_option_t *)malloc(sizeof(cups_option_t)); | |
101 | else | |
102 | temp = (cups_option_t *)realloc(*options, sizeof(cups_option_t) * | |
103 | (num_options + 1)); | |
104 | ||
105 | if (temp == NULL) | |
20fbc903 | 106 | { |
f11a948a | 107 | DEBUG_puts("3cupsAddOption: Unable to expand option array, returning 0"); |
ef416fc2 | 108 | return (0); |
20fbc903 | 109 | } |
ef416fc2 | 110 | |
426c6a59 MS |
111 | *options = temp; |
112 | ||
113 | if (insert < num_options) | |
114 | { | |
f11a948a | 115 | DEBUG_printf(("4cupsAddOption: Shifting %d options...", |
426c6a59 MS |
116 | (int)(num_options - insert))); |
117 | memmove(temp + insert + 1, temp + insert, | |
118 | (num_options - insert) * sizeof(cups_option_t)); | |
119 | } | |
120 | ||
121 | temp += insert; | |
2e4ff8af | 122 | temp->name = _cupsStrAlloc(name); |
ef416fc2 | 123 | num_options ++; |
124 | } | |
125 | else | |
126 | { | |
127 | /* | |
128 | * Match found; free the old value... | |
129 | */ | |
130 | ||
f11a948a | 131 | DEBUG_printf(("4cupsAddOption: Option already exists at index %d...", |
426c6a59 MS |
132 | insert)); |
133 | ||
134 | temp = *options + insert; | |
2e4ff8af | 135 | _cupsStrFree(temp->value); |
ef416fc2 | 136 | } |
137 | ||
2e4ff8af | 138 | temp->value = _cupsStrAlloc(value); |
ef416fc2 | 139 | |
f11a948a | 140 | DEBUG_printf(("3cupsAddOption: Returning %d", num_options)); |
20fbc903 | 141 | |
ef416fc2 | 142 | return (num_options); |
143 | } | |
144 | ||
145 | ||
146 | /* | |
147 | * 'cupsFreeOptions()' - Free all memory used by options. | |
148 | */ | |
149 | ||
150 | void | |
151 | cupsFreeOptions( | |
152 | int num_options, /* I - Number of options */ | |
153 | cups_option_t *options) /* I - Pointer to options */ | |
154 | { | |
155 | int i; /* Looping var */ | |
156 | ||
157 | ||
e07d4801 | 158 | DEBUG_printf(("cupsFreeOptions(num_options=%d, options=%p)", num_options, |
20fbc903 MS |
159 | options)); |
160 | ||
161 | if (num_options <= 0 || !options) | |
ef416fc2 | 162 | return; |
163 | ||
164 | for (i = 0; i < num_options; i ++) | |
165 | { | |
2e4ff8af MS |
166 | _cupsStrFree(options[i].name); |
167 | _cupsStrFree(options[i].value); | |
ef416fc2 | 168 | } |
169 | ||
170 | free(options); | |
171 | } | |
172 | ||
173 | ||
174 | /* | |
175 | * 'cupsGetOption()' - Get an option value. | |
176 | */ | |
177 | ||
5a738aea | 178 | const char * /* O - Option value or @code NULL@ */ |
ef416fc2 | 179 | cupsGetOption(const char *name, /* I - Name of option */ |
180 | int num_options,/* I - Number of options */ | |
181 | cups_option_t *options) /* I - Options */ | |
182 | { | |
426c6a59 MS |
183 | int diff, /* Result of comparison */ |
184 | match; /* Matching index */ | |
ef416fc2 | 185 | |
186 | ||
e07d4801 | 187 | DEBUG_printf(("2cupsGetOption(name=\"%s\", num_options=%d, options=%p)", |
20fbc903 MS |
188 | name, num_options, options)); |
189 | ||
190 | if (!name || num_options <= 0 || !options) | |
191 | { | |
e07d4801 | 192 | DEBUG_puts("3cupsGetOption: Returning NULL"); |
ef416fc2 | 193 | return (NULL); |
20fbc903 | 194 | } |
ef416fc2 | 195 | |
426c6a59 MS |
196 | match = cups_find_option(name, num_options, options, -1, &diff); |
197 | ||
198 | if (!diff) | |
199 | { | |
e07d4801 | 200 | DEBUG_printf(("3cupsGetOption: Returning \"%s\"", options[match].value)); |
426c6a59 MS |
201 | return (options[match].value); |
202 | } | |
ef416fc2 | 203 | |
e07d4801 | 204 | DEBUG_puts("3cupsGetOption: Returning NULL"); |
ef416fc2 | 205 | return (NULL); |
206 | } | |
207 | ||
208 | ||
ef416fc2 | 209 | /* |
b423cd4c | 210 | * 'cupsParseOptions()' - Parse options from a command-line argument. |
211 | * | |
212 | * This function converts space-delimited name/value pairs according | |
213 | * to the PAPI text option ABNF specification. Collection values | |
214 | * ("name={a=... b=... c=...}") are stored with the curley brackets | |
5a738aea MS |
215 | * intact - use @code cupsParseOptions@ on the value to extract the |
216 | * collection attributes. | |
b423cd4c | 217 | */ |
218 | ||
219 | int /* O - Number of options found */ | |
220 | cupsParseOptions( | |
221 | const char *arg, /* I - Argument to parse */ | |
222 | int num_options, /* I - Number of options */ | |
223 | cups_option_t **options) /* O - Options found */ | |
224 | { | |
225 | char *copyarg, /* Copy of input string */ | |
226 | *ptr, /* Pointer into string */ | |
227 | *name, /* Pointer to name */ | |
5a738aea | 228 | *value, /* Pointer to value */ |
426c6a59 | 229 | sep, /* Separator character */ |
5a738aea | 230 | quote; /* Quote character */ |
b423cd4c | 231 | |
232 | ||
e07d4801 | 233 | DEBUG_printf(("cupsParseOptions(arg=\"%s\", num_options=%d, options=%p)", |
20fbc903 MS |
234 | arg, num_options, options)); |
235 | ||
91c84a35 MS |
236 | /* |
237 | * Range check input... | |
238 | */ | |
239 | ||
240 | if (!arg) | |
20fbc903 | 241 | { |
e07d4801 | 242 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); |
91c84a35 | 243 | return (num_options); |
20fbc903 | 244 | } |
91c84a35 MS |
245 | |
246 | if (!options || num_options < 0) | |
20fbc903 | 247 | { |
e07d4801 | 248 | DEBUG_puts("1cupsParseOptions: Returning 0"); |
b423cd4c | 249 | return (0); |
20fbc903 | 250 | } |
b423cd4c | 251 | |
252 | /* | |
253 | * Make a copy of the argument string and then divide it up... | |
254 | */ | |
255 | ||
91c84a35 | 256 | if ((copyarg = strdup(arg)) == NULL) |
20fbc903 | 257 | { |
e07d4801 MS |
258 | DEBUG_puts("1cupsParseOptions: Unable to copy arg string"); |
259 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); | |
91c84a35 | 260 | return (num_options); |
20fbc903 | 261 | } |
91c84a35 | 262 | |
ee571f26 MS |
263 | if (*copyarg == '{') |
264 | { | |
265 | /* | |
266 | * Remove surrounding {} so we can parse "{name=value ... name=value}"... | |
267 | */ | |
268 | ||
269 | if ((ptr = copyarg + strlen(copyarg) - 1) > copyarg && *ptr == '}') | |
270 | { | |
271 | *ptr = '\0'; | |
272 | ptr = copyarg + 1; | |
273 | } | |
274 | else | |
275 | ptr = copyarg; | |
276 | } | |
277 | else | |
278 | ptr = copyarg; | |
b423cd4c | 279 | |
280 | /* | |
281 | * Skip leading spaces... | |
282 | */ | |
283 | ||
7cf5915e | 284 | while (_cups_isspace(*ptr)) |
b423cd4c | 285 | ptr ++; |
286 | ||
287 | /* | |
288 | * Loop through the string... | |
289 | */ | |
290 | ||
291 | while (*ptr != '\0') | |
292 | { | |
293 | /* | |
294 | * Get the name up to a SPACE, =, or end-of-string... | |
295 | */ | |
296 | ||
297 | name = ptr; | |
7cf5915e | 298 | while (!strchr("\f\n\r\t\v =", *ptr) && *ptr) |
b423cd4c | 299 | ptr ++; |
300 | ||
301 | /* | |
302 | * Avoid an empty name... | |
303 | */ | |
304 | ||
305 | if (ptr == name) | |
306 | break; | |
307 | ||
308 | /* | |
309 | * Skip trailing spaces... | |
310 | */ | |
311 | ||
7cf5915e | 312 | while (_cups_isspace(*ptr)) |
b423cd4c | 313 | *ptr++ = '\0'; |
314 | ||
426c6a59 MS |
315 | if ((sep = *ptr) == '=') |
316 | *ptr++ = '\0'; | |
317 | ||
e07d4801 | 318 | DEBUG_printf(("2cupsParseOptions: name=\"%s\"", name)); |
20fbc903 | 319 | |
426c6a59 | 320 | if (sep != '=') |
b423cd4c | 321 | { |
322 | /* | |
5a738aea | 323 | * Boolean option... |
b423cd4c | 324 | */ |
325 | ||
88f9aafc | 326 | if (!_cups_strncasecmp(name, "no", 2)) |
b423cd4c | 327 | num_options = cupsAddOption(name + 2, "false", num_options, |
328 | options); | |
329 | else | |
330 | num_options = cupsAddOption(name, "true", num_options, options); | |
331 | ||
332 | continue; | |
333 | } | |
334 | ||
335 | /* | |
336 | * Remove = and parse the value... | |
337 | */ | |
338 | ||
426c6a59 | 339 | value = ptr; |
b423cd4c | 340 | |
7cf5915e | 341 | while (*ptr && !_cups_isspace(*ptr)) |
b423cd4c | 342 | { |
20fbc903 MS |
343 | if (*ptr == ',') |
344 | ptr ++; | |
345 | else if (*ptr == '\'' || *ptr == '\"') | |
b423cd4c | 346 | { |
20fbc903 MS |
347 | /* |
348 | * Quoted string constant... | |
349 | */ | |
b423cd4c | 350 | |
20fbc903 MS |
351 | quote = *ptr; |
352 | _cups_strcpy(ptr, ptr + 1); | |
b423cd4c | 353 | |
20fbc903 MS |
354 | while (*ptr != quote && *ptr) |
355 | { | |
356 | if (*ptr == '\\' && ptr[1]) | |
357 | _cups_strcpy(ptr, ptr + 1); | |
358 | ||
359 | ptr ++; | |
360 | } | |
b423cd4c | 361 | |
20fbc903 MS |
362 | if (*ptr) |
363 | _cups_strcpy(ptr, ptr + 1); | |
364 | } | |
365 | else if (*ptr == '{') | |
366 | { | |
367 | /* | |
368 | * Collection value... | |
369 | */ | |
b423cd4c | 370 | |
20fbc903 | 371 | int depth; |
b423cd4c | 372 | |
20fbc903 | 373 | for (depth = 0; *ptr; ptr ++) |
b423cd4c | 374 | { |
20fbc903 MS |
375 | if (*ptr == '{') |
376 | depth ++; | |
377 | else if (*ptr == '}') | |
b423cd4c | 378 | { |
20fbc903 MS |
379 | depth --; |
380 | if (!depth) | |
381 | { | |
382 | ptr ++; | |
b423cd4c | 383 | break; |
20fbc903 | 384 | } |
b423cd4c | 385 | } |
20fbc903 MS |
386 | else if (*ptr == '\\' && ptr[1]) |
387 | _cups_strcpy(ptr, ptr + 1); | |
388 | } | |
389 | } | |
390 | else | |
b423cd4c | 391 | { |
20fbc903 MS |
392 | /* |
393 | * Normal space-delimited string... | |
394 | */ | |
b423cd4c | 395 | |
7cf5915e | 396 | while (*ptr && !_cups_isspace(*ptr)) |
20fbc903 MS |
397 | { |
398 | if (*ptr == '\\' && ptr[1]) | |
399 | _cups_strcpy(ptr, ptr + 1); | |
400 | ||
401 | ptr ++; | |
402 | } | |
b423cd4c | 403 | } |
404 | } | |
405 | ||
20fbc903 MS |
406 | if (*ptr != '\0') |
407 | *ptr++ = '\0'; | |
408 | ||
e07d4801 | 409 | DEBUG_printf(("2cupsParseOptions: value=\"%s\"", value)); |
20fbc903 | 410 | |
b423cd4c | 411 | /* |
412 | * Skip trailing whitespace... | |
413 | */ | |
414 | ||
7cf5915e | 415 | while (_cups_isspace(*ptr)) |
20fbc903 | 416 | ptr ++; |
b423cd4c | 417 | |
418 | /* | |
419 | * Add the string value... | |
420 | */ | |
421 | ||
422 | num_options = cupsAddOption(name, value, num_options, options); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Free the copy of the argument we made and return the number of options | |
427 | * found. | |
428 | */ | |
429 | ||
430 | free(copyarg); | |
431 | ||
e07d4801 | 432 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); |
20fbc903 | 433 | |
b423cd4c | 434 | return (num_options); |
435 | } | |
436 | ||
437 | ||
438 | /* | |
f7deaa1a | 439 | * 'cupsRemoveOption()' - Remove an option from an option array. |
b423cd4c | 440 | * |
f3c17241 | 441 | * @since CUPS 1.2/OS X 10.5@ |
b423cd4c | 442 | */ |
443 | ||
444 | int /* O - New number of options */ | |
445 | cupsRemoveOption( | |
446 | const char *name, /* I - Option name */ | |
447 | int num_options, /* I - Current number of options */ | |
448 | cups_option_t **options) /* IO - Options */ | |
449 | { | |
450 | int i; /* Looping var */ | |
451 | cups_option_t *option; /* Current option */ | |
452 | ||
453 | ||
f11a948a | 454 | DEBUG_printf(("2cupsRemoveOption(name=\"%s\", num_options=%d, options=%p)", |
20fbc903 MS |
455 | name, num_options, options)); |
456 | ||
b423cd4c | 457 | /* |
458 | * Range check input... | |
459 | */ | |
460 | ||
461 | if (!name || num_options < 1 || !options) | |
20fbc903 | 462 | { |
f11a948a | 463 | DEBUG_printf(("3cupsRemoveOption: Returning %d", num_options)); |
b423cd4c | 464 | return (num_options); |
20fbc903 | 465 | } |
b423cd4c | 466 | |
467 | /* | |
468 | * Loop for the option... | |
469 | */ | |
470 | ||
471 | for (i = num_options, option = *options; i > 0; i --, option ++) | |
88f9aafc | 472 | if (!_cups_strcasecmp(name, option->name)) |
b423cd4c | 473 | break; |
474 | ||
475 | if (i) | |
476 | { | |
477 | /* | |
478 | * Remove this option from the array... | |
479 | */ | |
480 | ||
f11a948a | 481 | DEBUG_puts("4cupsRemoveOption: Found option, removing it..."); |
20fbc903 | 482 | |
b423cd4c | 483 | num_options --; |
484 | i --; | |
485 | ||
2e4ff8af MS |
486 | _cupsStrFree(option->name); |
487 | _cupsStrFree(option->value); | |
b423cd4c | 488 | |
489 | if (i > 0) | |
f7deaa1a | 490 | memmove(option, option + 1, i * sizeof(cups_option_t)); |
b423cd4c | 491 | } |
492 | ||
493 | /* | |
494 | * Return the new number of options... | |
495 | */ | |
496 | ||
f11a948a | 497 | DEBUG_printf(("3cupsRemoveOption: Returning %d", num_options)); |
b423cd4c | 498 | return (num_options); |
499 | } | |
500 | ||
501 | ||
f8b3a85b MS |
502 | /* |
503 | * '_cupsGet1284Values()' - Get 1284 device ID keys and values. | |
504 | * | |
505 | * The returned dictionary is a CUPS option array that can be queried with | |
506 | * cupsGetOption and freed with cupsFreeOptions. | |
507 | */ | |
508 | ||
509 | int /* O - Number of key/value pairs */ | |
510 | _cupsGet1284Values( | |
511 | const char *device_id, /* I - IEEE-1284 device ID string */ | |
512 | cups_option_t **values) /* O - Array of key/value pairs */ | |
513 | { | |
514 | int num_values; /* Number of values */ | |
515 | char key[256], /* Key string */ | |
516 | value[256], /* Value string */ | |
517 | *ptr; /* Pointer into key/value */ | |
518 | ||
519 | ||
520 | /* | |
521 | * Range check input... | |
522 | */ | |
523 | ||
524 | if (values) | |
525 | *values = NULL; | |
526 | ||
527 | if (!device_id || !values) | |
528 | return (0); | |
529 | ||
530 | /* | |
531 | * Parse the 1284 device ID value into keys and values. The format is | |
532 | * repeating sequences of: | |
533 | * | |
534 | * [whitespace]key:value[whitespace]; | |
535 | */ | |
536 | ||
537 | num_values = 0; | |
538 | while (*device_id) | |
539 | { | |
7cf5915e | 540 | while (_cups_isspace(*device_id)) |
f8b3a85b MS |
541 | device_id ++; |
542 | ||
543 | if (!*device_id) | |
544 | break; | |
545 | ||
546 | for (ptr = key; *device_id && *device_id != ':'; device_id ++) | |
547 | if (ptr < (key + sizeof(key) - 1)) | |
548 | *ptr++ = *device_id; | |
549 | ||
550 | if (!*device_id) | |
551 | break; | |
552 | ||
7cf5915e | 553 | while (ptr > key && _cups_isspace(ptr[-1])) |
f8b3a85b MS |
554 | ptr --; |
555 | ||
556 | *ptr = '\0'; | |
557 | device_id ++; | |
558 | ||
7cf5915e | 559 | while (_cups_isspace(*device_id)) |
f8b3a85b MS |
560 | device_id ++; |
561 | ||
562 | if (!*device_id) | |
563 | break; | |
564 | ||
565 | for (ptr = value; *device_id && *device_id != ';'; device_id ++) | |
566 | if (ptr < (value + sizeof(value) - 1)) | |
567 | *ptr++ = *device_id; | |
568 | ||
569 | if (!*device_id) | |
570 | break; | |
571 | ||
7cf5915e | 572 | while (ptr > value && _cups_isspace(ptr[-1])) |
f8b3a85b MS |
573 | ptr --; |
574 | ||
575 | *ptr = '\0'; | |
576 | device_id ++; | |
577 | ||
578 | num_values = cupsAddOption(key, value, num_values, values); | |
579 | } | |
580 | ||
581 | return (num_values); | |
582 | } | |
583 | ||
584 | ||
09a101d6 | 585 | /* |
426c6a59 MS |
586 | * 'cups_compare_options()' - Compare two options. |
587 | */ | |
588 | ||
589 | static int /* O - Result of comparison */ | |
590 | cups_compare_options(cups_option_t *a, /* I - First option */ | |
591 | cups_option_t *b) /* I - Second option */ | |
592 | { | |
88f9aafc | 593 | return (_cups_strcasecmp(a->name, b->name)); |
426c6a59 MS |
594 | } |
595 | ||
596 | ||
597 | /* | |
598 | * 'cups_find_option()' - Find an option using a binary search. | |
599 | */ | |
600 | ||
601 | static int /* O - Index of match */ | |
602 | cups_find_option( | |
603 | const char *name, /* I - Option name */ | |
604 | int num_options, /* I - Number of options */ | |
605 | cups_option_t *options, /* I - Options */ | |
606 | int prev, /* I - Previous index */ | |
607 | int *rdiff) /* O - Difference of match */ | |
608 | { | |
609 | int left, /* Low mark for binary search */ | |
610 | right, /* High mark for binary search */ | |
611 | current, /* Current index */ | |
612 | diff; /* Result of comparison */ | |
613 | cups_option_t key; /* Search key */ | |
614 | ||
615 | ||
e07d4801 MS |
616 | DEBUG_printf(("7cups_find_option(name=\"%s\", num_options=%d, options=%p, " |
617 | "prev=%d, rdiff=%p)", name, num_options, options, prev, | |
426c6a59 MS |
618 | rdiff)); |
619 | ||
620 | #ifdef DEBUG | |
621 | for (left = 0; left < num_options; left ++) | |
e07d4801 | 622 | DEBUG_printf(("9cups_find_option: options[%d].name=\"%s\", .value=\"%s\"", |
426c6a59 MS |
623 | left, options[left].name, options[left].value)); |
624 | #endif /* DEBUG */ | |
625 | ||
626 | key.name = (char *)name; | |
627 | ||
628 | if (prev >= 0) | |
629 | { | |
630 | /* | |
631 | * Start search on either side of previous... | |
632 | */ | |
633 | ||
634 | if ((diff = cups_compare_options(&key, options + prev)) == 0 || | |
635 | (diff < 0 && prev == 0) || | |
636 | (diff > 0 && prev == (num_options - 1))) | |
637 | { | |
638 | *rdiff = diff; | |
639 | return (prev); | |
640 | } | |
641 | else if (diff < 0) | |
642 | { | |
643 | /* | |
644 | * Start with previous on right side... | |
645 | */ | |
646 | ||
647 | left = 0; | |
648 | right = prev; | |
649 | } | |
650 | else | |
651 | { | |
652 | /* | |
653 | * Start wih previous on left side... | |
654 | */ | |
655 | ||
656 | left = prev; | |
657 | right = num_options - 1; | |
658 | } | |
659 | } | |
660 | else | |
661 | { | |
662 | /* | |
663 | * Start search in the middle... | |
664 | */ | |
665 | ||
666 | left = 0; | |
667 | right = num_options - 1; | |
668 | } | |
669 | ||
670 | do | |
671 | { | |
672 | current = (left + right) / 2; | |
673 | diff = cups_compare_options(&key, options + current); | |
674 | ||
675 | if (diff == 0) | |
676 | break; | |
677 | else if (diff < 0) | |
678 | right = current; | |
679 | else | |
680 | left = current; | |
681 | } | |
682 | while ((right - left) > 1); | |
683 | ||
684 | if (diff != 0) | |
685 | { | |
686 | /* | |
687 | * Check the last 1 or 2 elements... | |
688 | */ | |
689 | ||
690 | if ((diff = cups_compare_options(&key, options + left)) <= 0) | |
691 | current = left; | |
692 | else | |
693 | { | |
694 | diff = cups_compare_options(&key, options + right); | |
695 | current = right; | |
696 | } | |
697 | } | |
698 | ||
699 | /* | |
700 | * Return the closest destination and the difference... | |
701 | */ | |
702 | ||
703 | *rdiff = diff; | |
704 | ||
705 | return (current); | |
706 | } | |
707 | ||
708 | ||
709 | /* | |
f2d18633 | 710 | * End of "$Id$". |
ef416fc2 | 711 | */ |