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Commit | Line | Data |
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ef416fc2 | 1 | /* |
7e86f2f6 | 2 | * Option routines for CUPS. |
ef416fc2 | 3 | * |
98d88c8d | 4 | * Copyright 2007-2017 by Apple Inc. |
7e86f2f6 | 5 | * Copyright 1997-2007 by Easy Software Products. |
ef416fc2 | 6 | * |
e3101897 | 7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. |
ef416fc2 | 8 | */ |
9 | ||
10 | /* | |
11 | * Include necessary headers... | |
12 | */ | |
13 | ||
7cf5915e | 14 | #include "cups-private.h" |
fb863569 | 15 | #include "debug-internal.h" |
ef416fc2 | 16 | |
17 | ||
426c6a59 MS |
18 | /* |
19 | * Local functions... | |
20 | */ | |
21 | ||
22 | static int cups_compare_options(cups_option_t *a, cups_option_t *b); | |
23 | static int cups_find_option(const char *name, int num_options, | |
24 | cups_option_t *option, int prev, int *rdiff); | |
25 | ||
26 | ||
0d7cb94a MS |
27 | /* |
28 | * 'cupsAddIntegerOption()' - Add an integer option to an option array. | |
29 | * | |
30 | * New option arrays can be initialized simply by passing 0 for the | |
31 | * "num_options" parameter. | |
32 | * | |
98d88c8d | 33 | * @since CUPS 2.2.4/macOS 10.13@ |
0d7cb94a MS |
34 | */ |
35 | ||
36 | int /* O - Number of options */ | |
37 | cupsAddIntegerOption( | |
38 | const char *name, /* I - Name of option */ | |
39 | int value, /* I - Value of option */ | |
40 | int num_options, /* I - Number of options */ | |
41 | cups_option_t **options) /* IO - Pointer to options */ | |
42 | { | |
43 | char strvalue[32]; /* String value */ | |
44 | ||
45 | ||
46 | snprintf(strvalue, sizeof(strvalue), "%d", value); | |
47 | ||
48 | return (cupsAddOption(name, strvalue, num_options, options)); | |
49 | } | |
50 | ||
51 | ||
ef416fc2 | 52 | /* |
53 | * 'cupsAddOption()' - Add an option to an option array. | |
5a738aea MS |
54 | * |
55 | * New option arrays can be initialized simply by passing 0 for the | |
56 | * "num_options" parameter. | |
ef416fc2 | 57 | */ |
58 | ||
5a738aea MS |
59 | int /* O - Number of options */ |
60 | cupsAddOption(const char *name, /* I - Name of option */ | |
61 | const char *value, /* I - Value of option */ | |
62 | int num_options,/* I - Number of options */ | |
ef416fc2 | 63 | cups_option_t **options) /* IO - Pointer to options */ |
64 | { | |
ef416fc2 | 65 | cups_option_t *temp; /* Pointer to new option */ |
426c6a59 MS |
66 | int insert, /* Insertion point */ |
67 | diff; /* Result of search */ | |
ef416fc2 | 68 | |
69 | ||
807315e6 | 70 | DEBUG_printf(("2cupsAddOption(name=\"%s\", value=\"%s\", num_options=%d, options=%p)", name, value, num_options, (void *)options)); |
88f9aafc | 71 | |
20fbc903 MS |
72 | if (!name || !name[0] || !value || !options || num_options < 0) |
73 | { | |
f11a948a | 74 | DEBUG_printf(("3cupsAddOption: Returning %d", num_options)); |
ef416fc2 | 75 | return (num_options); |
20fbc903 | 76 | } |
ef416fc2 | 77 | |
d2123aee MS |
78 | if (!_cups_strcasecmp(name, "cupsPrintQuality")) |
79 | num_options = cupsRemoveOption("print-quality", num_options, options); | |
80 | else if (!_cups_strcasecmp(name, "print-quality")) | |
81 | num_options = cupsRemoveOption("cupsPrintQuality", num_options, options); | |
82 | ||
ef416fc2 | 83 | /* |
84 | * Look for an existing option with the same name... | |
85 | */ | |
86 | ||
426c6a59 MS |
87 | if (num_options == 0) |
88 | { | |
89 | insert = 0; | |
90 | diff = 1; | |
91 | } | |
92 | else | |
93 | { | |
94 | insert = cups_find_option(name, num_options, *options, num_options - 1, | |
95 | &diff); | |
ef416fc2 | 96 | |
426c6a59 MS |
97 | if (diff > 0) |
98 | insert ++; | |
99 | } | |
100 | ||
101 | if (diff) | |
ef416fc2 | 102 | { |
103 | /* | |
104 | * No matching option name... | |
105 | */ | |
106 | ||
f11a948a | 107 | DEBUG_printf(("4cupsAddOption: New option inserted at index %d...", |
426c6a59 | 108 | insert)); |
20fbc903 | 109 | |
ef416fc2 | 110 | if (num_options == 0) |
111 | temp = (cups_option_t *)malloc(sizeof(cups_option_t)); | |
112 | else | |
7e86f2f6 | 113 | temp = (cups_option_t *)realloc(*options, sizeof(cups_option_t) * (size_t)(num_options + 1)); |
ef416fc2 | 114 | |
7e86f2f6 | 115 | if (!temp) |
20fbc903 | 116 | { |
f11a948a | 117 | DEBUG_puts("3cupsAddOption: Unable to expand option array, returning 0"); |
ef416fc2 | 118 | return (0); |
20fbc903 | 119 | } |
ef416fc2 | 120 | |
426c6a59 MS |
121 | *options = temp; |
122 | ||
123 | if (insert < num_options) | |
124 | { | |
f11a948a | 125 | DEBUG_printf(("4cupsAddOption: Shifting %d options...", |
426c6a59 | 126 | (int)(num_options - insert))); |
7e86f2f6 | 127 | memmove(temp + insert + 1, temp + insert, (size_t)(num_options - insert) * sizeof(cups_option_t)); |
426c6a59 MS |
128 | } |
129 | ||
130 | temp += insert; | |
2e4ff8af | 131 | temp->name = _cupsStrAlloc(name); |
ef416fc2 | 132 | num_options ++; |
133 | } | |
134 | else | |
135 | { | |
136 | /* | |
137 | * Match found; free the old value... | |
138 | */ | |
139 | ||
f11a948a | 140 | DEBUG_printf(("4cupsAddOption: Option already exists at index %d...", |
426c6a59 MS |
141 | insert)); |
142 | ||
143 | temp = *options + insert; | |
2e4ff8af | 144 | _cupsStrFree(temp->value); |
ef416fc2 | 145 | } |
146 | ||
2e4ff8af | 147 | temp->value = _cupsStrAlloc(value); |
ef416fc2 | 148 | |
f11a948a | 149 | DEBUG_printf(("3cupsAddOption: Returning %d", num_options)); |
20fbc903 | 150 | |
ef416fc2 | 151 | return (num_options); |
152 | } | |
153 | ||
154 | ||
155 | /* | |
156 | * 'cupsFreeOptions()' - Free all memory used by options. | |
157 | */ | |
158 | ||
159 | void | |
160 | cupsFreeOptions( | |
161 | int num_options, /* I - Number of options */ | |
162 | cups_option_t *options) /* I - Pointer to options */ | |
163 | { | |
164 | int i; /* Looping var */ | |
165 | ||
166 | ||
807315e6 | 167 | DEBUG_printf(("cupsFreeOptions(num_options=%d, options=%p)", num_options, (void *)options)); |
20fbc903 MS |
168 | |
169 | if (num_options <= 0 || !options) | |
ef416fc2 | 170 | return; |
171 | ||
172 | for (i = 0; i < num_options; i ++) | |
173 | { | |
2e4ff8af MS |
174 | _cupsStrFree(options[i].name); |
175 | _cupsStrFree(options[i].value); | |
ef416fc2 | 176 | } |
177 | ||
178 | free(options); | |
179 | } | |
180 | ||
181 | ||
0d7cb94a MS |
182 | /* |
183 | * 'cupsGetIntegerOption()' - Get an integer option value. | |
184 | * | |
185 | * INT_MIN is returned when the option does not exist, is not an integer, or | |
186 | * exceeds the range of values for the "int" type. | |
187 | * | |
98d88c8d | 188 | * @since CUPS 2.2.4/macOS 10.13@ |
0d7cb94a MS |
189 | */ |
190 | ||
191 | int /* O - Option value or @code INT_MIN@ */ | |
192 | cupsGetIntegerOption( | |
193 | const char *name, /* I - Name of option */ | |
194 | int num_options, /* I - Number of options */ | |
195 | cups_option_t *options) /* I - Options */ | |
196 | { | |
197 | const char *value = cupsGetOption(name, num_options, options); | |
198 | /* String value of option */ | |
199 | char *ptr; /* Pointer into string value */ | |
200 | long intvalue; /* Integer value */ | |
201 | ||
202 | ||
203 | if (!value || !*value) | |
204 | return (INT_MIN); | |
205 | ||
206 | intvalue = strtol(value, &ptr, 10); | |
207 | if (intvalue < INT_MIN || intvalue > INT_MAX || *ptr) | |
208 | return (INT_MIN); | |
209 | ||
210 | return ((int)intvalue); | |
211 | } | |
212 | ||
213 | ||
ef416fc2 | 214 | /* |
215 | * 'cupsGetOption()' - Get an option value. | |
216 | */ | |
217 | ||
5a738aea | 218 | const char * /* O - Option value or @code NULL@ */ |
ef416fc2 | 219 | cupsGetOption(const char *name, /* I - Name of option */ |
220 | int num_options,/* I - Number of options */ | |
221 | cups_option_t *options) /* I - Options */ | |
222 | { | |
426c6a59 MS |
223 | int diff, /* Result of comparison */ |
224 | match; /* Matching index */ | |
ef416fc2 | 225 | |
226 | ||
807315e6 | 227 | DEBUG_printf(("2cupsGetOption(name=\"%s\", num_options=%d, options=%p)", name, num_options, (void *)options)); |
20fbc903 MS |
228 | |
229 | if (!name || num_options <= 0 || !options) | |
230 | { | |
e07d4801 | 231 | DEBUG_puts("3cupsGetOption: Returning NULL"); |
ef416fc2 | 232 | return (NULL); |
20fbc903 | 233 | } |
ef416fc2 | 234 | |
426c6a59 MS |
235 | match = cups_find_option(name, num_options, options, -1, &diff); |
236 | ||
237 | if (!diff) | |
238 | { | |
e07d4801 | 239 | DEBUG_printf(("3cupsGetOption: Returning \"%s\"", options[match].value)); |
426c6a59 MS |
240 | return (options[match].value); |
241 | } | |
ef416fc2 | 242 | |
e07d4801 | 243 | DEBUG_puts("3cupsGetOption: Returning NULL"); |
ef416fc2 | 244 | return (NULL); |
245 | } | |
246 | ||
247 | ||
ef416fc2 | 248 | /* |
b423cd4c | 249 | * 'cupsParseOptions()' - Parse options from a command-line argument. |
250 | * | |
251 | * This function converts space-delimited name/value pairs according | |
252 | * to the PAPI text option ABNF specification. Collection values | |
253 | * ("name={a=... b=... c=...}") are stored with the curley brackets | |
5a738aea MS |
254 | * intact - use @code cupsParseOptions@ on the value to extract the |
255 | * collection attributes. | |
b423cd4c | 256 | */ |
257 | ||
258 | int /* O - Number of options found */ | |
259 | cupsParseOptions( | |
260 | const char *arg, /* I - Argument to parse */ | |
261 | int num_options, /* I - Number of options */ | |
262 | cups_option_t **options) /* O - Options found */ | |
263 | { | |
264 | char *copyarg, /* Copy of input string */ | |
265 | *ptr, /* Pointer into string */ | |
266 | *name, /* Pointer to name */ | |
5a738aea | 267 | *value, /* Pointer to value */ |
426c6a59 | 268 | sep, /* Separator character */ |
5a738aea | 269 | quote; /* Quote character */ |
b423cd4c | 270 | |
271 | ||
807315e6 | 272 | DEBUG_printf(("cupsParseOptions(arg=\"%s\", num_options=%d, options=%p)", arg, num_options, (void *)options)); |
20fbc903 | 273 | |
91c84a35 MS |
274 | /* |
275 | * Range check input... | |
276 | */ | |
277 | ||
278 | if (!arg) | |
20fbc903 | 279 | { |
e07d4801 | 280 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); |
91c84a35 | 281 | return (num_options); |
20fbc903 | 282 | } |
91c84a35 MS |
283 | |
284 | if (!options || num_options < 0) | |
20fbc903 | 285 | { |
e07d4801 | 286 | DEBUG_puts("1cupsParseOptions: Returning 0"); |
b423cd4c | 287 | return (0); |
20fbc903 | 288 | } |
b423cd4c | 289 | |
290 | /* | |
291 | * Make a copy of the argument string and then divide it up... | |
292 | */ | |
293 | ||
91c84a35 | 294 | if ((copyarg = strdup(arg)) == NULL) |
20fbc903 | 295 | { |
e07d4801 MS |
296 | DEBUG_puts("1cupsParseOptions: Unable to copy arg string"); |
297 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); | |
91c84a35 | 298 | return (num_options); |
20fbc903 | 299 | } |
91c84a35 | 300 | |
ee571f26 MS |
301 | if (*copyarg == '{') |
302 | { | |
303 | /* | |
304 | * Remove surrounding {} so we can parse "{name=value ... name=value}"... | |
305 | */ | |
306 | ||
307 | if ((ptr = copyarg + strlen(copyarg) - 1) > copyarg && *ptr == '}') | |
308 | { | |
309 | *ptr = '\0'; | |
310 | ptr = copyarg + 1; | |
311 | } | |
312 | else | |
313 | ptr = copyarg; | |
314 | } | |
315 | else | |
316 | ptr = copyarg; | |
b423cd4c | 317 | |
318 | /* | |
319 | * Skip leading spaces... | |
320 | */ | |
321 | ||
7cf5915e | 322 | while (_cups_isspace(*ptr)) |
b423cd4c | 323 | ptr ++; |
324 | ||
325 | /* | |
326 | * Loop through the string... | |
327 | */ | |
328 | ||
329 | while (*ptr != '\0') | |
330 | { | |
331 | /* | |
332 | * Get the name up to a SPACE, =, or end-of-string... | |
333 | */ | |
334 | ||
335 | name = ptr; | |
7cf5915e | 336 | while (!strchr("\f\n\r\t\v =", *ptr) && *ptr) |
b423cd4c | 337 | ptr ++; |
338 | ||
339 | /* | |
340 | * Avoid an empty name... | |
341 | */ | |
342 | ||
343 | if (ptr == name) | |
344 | break; | |
345 | ||
346 | /* | |
347 | * Skip trailing spaces... | |
348 | */ | |
349 | ||
7cf5915e | 350 | while (_cups_isspace(*ptr)) |
b423cd4c | 351 | *ptr++ = '\0'; |
352 | ||
426c6a59 MS |
353 | if ((sep = *ptr) == '=') |
354 | *ptr++ = '\0'; | |
355 | ||
e07d4801 | 356 | DEBUG_printf(("2cupsParseOptions: name=\"%s\"", name)); |
20fbc903 | 357 | |
426c6a59 | 358 | if (sep != '=') |
b423cd4c | 359 | { |
360 | /* | |
5a738aea | 361 | * Boolean option... |
b423cd4c | 362 | */ |
363 | ||
88f9aafc | 364 | if (!_cups_strncasecmp(name, "no", 2)) |
b423cd4c | 365 | num_options = cupsAddOption(name + 2, "false", num_options, |
366 | options); | |
367 | else | |
368 | num_options = cupsAddOption(name, "true", num_options, options); | |
369 | ||
370 | continue; | |
371 | } | |
372 | ||
373 | /* | |
374 | * Remove = and parse the value... | |
375 | */ | |
376 | ||
426c6a59 | 377 | value = ptr; |
b423cd4c | 378 | |
7cf5915e | 379 | while (*ptr && !_cups_isspace(*ptr)) |
b423cd4c | 380 | { |
20fbc903 MS |
381 | if (*ptr == ',') |
382 | ptr ++; | |
383 | else if (*ptr == '\'' || *ptr == '\"') | |
b423cd4c | 384 | { |
20fbc903 MS |
385 | /* |
386 | * Quoted string constant... | |
387 | */ | |
b423cd4c | 388 | |
20fbc903 MS |
389 | quote = *ptr; |
390 | _cups_strcpy(ptr, ptr + 1); | |
b423cd4c | 391 | |
20fbc903 MS |
392 | while (*ptr != quote && *ptr) |
393 | { | |
394 | if (*ptr == '\\' && ptr[1]) | |
395 | _cups_strcpy(ptr, ptr + 1); | |
396 | ||
397 | ptr ++; | |
398 | } | |
b423cd4c | 399 | |
20fbc903 MS |
400 | if (*ptr) |
401 | _cups_strcpy(ptr, ptr + 1); | |
402 | } | |
403 | else if (*ptr == '{') | |
404 | { | |
405 | /* | |
406 | * Collection value... | |
407 | */ | |
b423cd4c | 408 | |
20fbc903 | 409 | int depth; |
b423cd4c | 410 | |
20fbc903 | 411 | for (depth = 0; *ptr; ptr ++) |
b423cd4c | 412 | { |
20fbc903 MS |
413 | if (*ptr == '{') |
414 | depth ++; | |
415 | else if (*ptr == '}') | |
b423cd4c | 416 | { |
20fbc903 MS |
417 | depth --; |
418 | if (!depth) | |
419 | { | |
420 | ptr ++; | |
b423cd4c | 421 | break; |
20fbc903 | 422 | } |
b423cd4c | 423 | } |
20fbc903 MS |
424 | else if (*ptr == '\\' && ptr[1]) |
425 | _cups_strcpy(ptr, ptr + 1); | |
426 | } | |
427 | } | |
428 | else | |
b423cd4c | 429 | { |
20fbc903 MS |
430 | /* |
431 | * Normal space-delimited string... | |
432 | */ | |
b423cd4c | 433 | |
7cf5915e | 434 | while (*ptr && !_cups_isspace(*ptr)) |
20fbc903 MS |
435 | { |
436 | if (*ptr == '\\' && ptr[1]) | |
437 | _cups_strcpy(ptr, ptr + 1); | |
438 | ||
439 | ptr ++; | |
440 | } | |
b423cd4c | 441 | } |
442 | } | |
443 | ||
20fbc903 MS |
444 | if (*ptr != '\0') |
445 | *ptr++ = '\0'; | |
446 | ||
e07d4801 | 447 | DEBUG_printf(("2cupsParseOptions: value=\"%s\"", value)); |
20fbc903 | 448 | |
b423cd4c | 449 | /* |
450 | * Skip trailing whitespace... | |
451 | */ | |
452 | ||
7cf5915e | 453 | while (_cups_isspace(*ptr)) |
20fbc903 | 454 | ptr ++; |
b423cd4c | 455 | |
456 | /* | |
457 | * Add the string value... | |
458 | */ | |
459 | ||
460 | num_options = cupsAddOption(name, value, num_options, options); | |
461 | } | |
462 | ||
463 | /* | |
464 | * Free the copy of the argument we made and return the number of options | |
465 | * found. | |
466 | */ | |
467 | ||
468 | free(copyarg); | |
469 | ||
e07d4801 | 470 | DEBUG_printf(("1cupsParseOptions: Returning %d", num_options)); |
20fbc903 | 471 | |
b423cd4c | 472 | return (num_options); |
473 | } | |
474 | ||
475 | ||
476 | /* | |
f7deaa1a | 477 | * 'cupsRemoveOption()' - Remove an option from an option array. |
b423cd4c | 478 | * |
8072030b | 479 | * @since CUPS 1.2/macOS 10.5@ |
b423cd4c | 480 | */ |
481 | ||
482 | int /* O - New number of options */ | |
483 | cupsRemoveOption( | |
484 | const char *name, /* I - Option name */ | |
485 | int num_options, /* I - Current number of options */ | |
486 | cups_option_t **options) /* IO - Options */ | |
487 | { | |
488 | int i; /* Looping var */ | |
489 | cups_option_t *option; /* Current option */ | |
490 | ||
491 | ||
807315e6 | 492 | DEBUG_printf(("2cupsRemoveOption(name=\"%s\", num_options=%d, options=%p)", name, num_options, (void *)options)); |
20fbc903 | 493 | |
b423cd4c | 494 | /* |
495 | * Range check input... | |
496 | */ | |
497 | ||
498 | if (!name || num_options < 1 || !options) | |
20fbc903 | 499 | { |
f11a948a | 500 | DEBUG_printf(("3cupsRemoveOption: Returning %d", num_options)); |
b423cd4c | 501 | return (num_options); |
20fbc903 | 502 | } |
b423cd4c | 503 | |
504 | /* | |
505 | * Loop for the option... | |
506 | */ | |
507 | ||
508 | for (i = num_options, option = *options; i > 0; i --, option ++) | |
88f9aafc | 509 | if (!_cups_strcasecmp(name, option->name)) |
b423cd4c | 510 | break; |
511 | ||
512 | if (i) | |
513 | { | |
514 | /* | |
515 | * Remove this option from the array... | |
516 | */ | |
517 | ||
f11a948a | 518 | DEBUG_puts("4cupsRemoveOption: Found option, removing it..."); |
20fbc903 | 519 | |
b423cd4c | 520 | num_options --; |
521 | i --; | |
522 | ||
2e4ff8af MS |
523 | _cupsStrFree(option->name); |
524 | _cupsStrFree(option->value); | |
b423cd4c | 525 | |
526 | if (i > 0) | |
7e86f2f6 | 527 | memmove(option, option + 1, (size_t)i * sizeof(cups_option_t)); |
b423cd4c | 528 | } |
529 | ||
530 | /* | |
531 | * Return the new number of options... | |
532 | */ | |
533 | ||
f11a948a | 534 | DEBUG_printf(("3cupsRemoveOption: Returning %d", num_options)); |
b423cd4c | 535 | return (num_options); |
536 | } | |
537 | ||
538 | ||
f8b3a85b MS |
539 | /* |
540 | * '_cupsGet1284Values()' - Get 1284 device ID keys and values. | |
541 | * | |
542 | * The returned dictionary is a CUPS option array that can be queried with | |
543 | * cupsGetOption and freed with cupsFreeOptions. | |
544 | */ | |
545 | ||
546 | int /* O - Number of key/value pairs */ | |
547 | _cupsGet1284Values( | |
548 | const char *device_id, /* I - IEEE-1284 device ID string */ | |
549 | cups_option_t **values) /* O - Array of key/value pairs */ | |
550 | { | |
551 | int num_values; /* Number of values */ | |
552 | char key[256], /* Key string */ | |
553 | value[256], /* Value string */ | |
554 | *ptr; /* Pointer into key/value */ | |
555 | ||
556 | ||
557 | /* | |
558 | * Range check input... | |
559 | */ | |
560 | ||
561 | if (values) | |
562 | *values = NULL; | |
563 | ||
564 | if (!device_id || !values) | |
565 | return (0); | |
566 | ||
567 | /* | |
568 | * Parse the 1284 device ID value into keys and values. The format is | |
569 | * repeating sequences of: | |
570 | * | |
571 | * [whitespace]key:value[whitespace]; | |
572 | */ | |
573 | ||
574 | num_values = 0; | |
575 | while (*device_id) | |
576 | { | |
7cf5915e | 577 | while (_cups_isspace(*device_id)) |
f8b3a85b MS |
578 | device_id ++; |
579 | ||
580 | if (!*device_id) | |
581 | break; | |
582 | ||
583 | for (ptr = key; *device_id && *device_id != ':'; device_id ++) | |
584 | if (ptr < (key + sizeof(key) - 1)) | |
585 | *ptr++ = *device_id; | |
586 | ||
587 | if (!*device_id) | |
588 | break; | |
589 | ||
7cf5915e | 590 | while (ptr > key && _cups_isspace(ptr[-1])) |
f8b3a85b MS |
591 | ptr --; |
592 | ||
593 | *ptr = '\0'; | |
594 | device_id ++; | |
595 | ||
7cf5915e | 596 | while (_cups_isspace(*device_id)) |
f8b3a85b MS |
597 | device_id ++; |
598 | ||
599 | if (!*device_id) | |
600 | break; | |
601 | ||
602 | for (ptr = value; *device_id && *device_id != ';'; device_id ++) | |
603 | if (ptr < (value + sizeof(value) - 1)) | |
604 | *ptr++ = *device_id; | |
605 | ||
606 | if (!*device_id) | |
607 | break; | |
608 | ||
7cf5915e | 609 | while (ptr > value && _cups_isspace(ptr[-1])) |
f8b3a85b MS |
610 | ptr --; |
611 | ||
612 | *ptr = '\0'; | |
613 | device_id ++; | |
614 | ||
615 | num_values = cupsAddOption(key, value, num_values, values); | |
616 | } | |
617 | ||
618 | return (num_values); | |
619 | } | |
620 | ||
621 | ||
09a101d6 | 622 | /* |
426c6a59 MS |
623 | * 'cups_compare_options()' - Compare two options. |
624 | */ | |
625 | ||
626 | static int /* O - Result of comparison */ | |
627 | cups_compare_options(cups_option_t *a, /* I - First option */ | |
628 | cups_option_t *b) /* I - Second option */ | |
629 | { | |
88f9aafc | 630 | return (_cups_strcasecmp(a->name, b->name)); |
426c6a59 MS |
631 | } |
632 | ||
633 | ||
634 | /* | |
635 | * 'cups_find_option()' - Find an option using a binary search. | |
636 | */ | |
637 | ||
638 | static int /* O - Index of match */ | |
639 | cups_find_option( | |
640 | const char *name, /* I - Option name */ | |
641 | int num_options, /* I - Number of options */ | |
642 | cups_option_t *options, /* I - Options */ | |
643 | int prev, /* I - Previous index */ | |
644 | int *rdiff) /* O - Difference of match */ | |
645 | { | |
646 | int left, /* Low mark for binary search */ | |
647 | right, /* High mark for binary search */ | |
648 | current, /* Current index */ | |
649 | diff; /* Result of comparison */ | |
650 | cups_option_t key; /* Search key */ | |
651 | ||
652 | ||
807315e6 | 653 | DEBUG_printf(("7cups_find_option(name=\"%s\", num_options=%d, options=%p, prev=%d, rdiff=%p)", name, num_options, (void *)options, prev, (void *)rdiff)); |
426c6a59 MS |
654 | |
655 | #ifdef DEBUG | |
656 | for (left = 0; left < num_options; left ++) | |
e07d4801 | 657 | DEBUG_printf(("9cups_find_option: options[%d].name=\"%s\", .value=\"%s\"", |
426c6a59 MS |
658 | left, options[left].name, options[left].value)); |
659 | #endif /* DEBUG */ | |
660 | ||
661 | key.name = (char *)name; | |
662 | ||
663 | if (prev >= 0) | |
664 | { | |
665 | /* | |
666 | * Start search on either side of previous... | |
667 | */ | |
668 | ||
669 | if ((diff = cups_compare_options(&key, options + prev)) == 0 || | |
670 | (diff < 0 && prev == 0) || | |
671 | (diff > 0 && prev == (num_options - 1))) | |
672 | { | |
673 | *rdiff = diff; | |
674 | return (prev); | |
675 | } | |
676 | else if (diff < 0) | |
677 | { | |
678 | /* | |
679 | * Start with previous on right side... | |
680 | */ | |
681 | ||
682 | left = 0; | |
683 | right = prev; | |
684 | } | |
685 | else | |
686 | { | |
687 | /* | |
688 | * Start wih previous on left side... | |
689 | */ | |
690 | ||
691 | left = prev; | |
692 | right = num_options - 1; | |
693 | } | |
694 | } | |
695 | else | |
696 | { | |
697 | /* | |
698 | * Start search in the middle... | |
699 | */ | |
700 | ||
701 | left = 0; | |
702 | right = num_options - 1; | |
703 | } | |
704 | ||
705 | do | |
706 | { | |
707 | current = (left + right) / 2; | |
708 | diff = cups_compare_options(&key, options + current); | |
709 | ||
710 | if (diff == 0) | |
711 | break; | |
712 | else if (diff < 0) | |
713 | right = current; | |
714 | else | |
715 | left = current; | |
716 | } | |
717 | while ((right - left) > 1); | |
718 | ||
719 | if (diff != 0) | |
720 | { | |
721 | /* | |
722 | * Check the last 1 or 2 elements... | |
723 | */ | |
724 | ||
725 | if ((diff = cups_compare_options(&key, options + left)) <= 0) | |
726 | current = left; | |
727 | else | |
728 | { | |
729 | diff = cups_compare_options(&key, options + right); | |
730 | current = right; | |
731 | } | |
732 | } | |
733 | ||
734 | /* | |
735 | * Return the closest destination and the difference... | |
736 | */ | |
737 | ||
738 | *rdiff = diff; | |
739 | ||
740 | return (current); | |
741 | } |