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d3a684ee JR |
1 | /* |
2 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
5 | * of this software and associated documentation files (the "Software"), to deal | |
6 | * in the Software without restriction, including without limitation the rights | |
7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
8 | * copies of the Software, and to permit persons to whom the Software is | |
9 | * furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice shall be included in | |
12 | * all copies or substantial portions of the Software. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
20 | * SOFTWARE. | |
21 | */ | |
22 | ||
23 | #include <assert.h> | |
24 | #include <stdarg.h> | |
25 | #include <stdbool.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
29 | ||
30 | #include "argpar.h" | |
31 | ||
32 | #define argpar_realloc(_ptr, _type, _nmemb) ((_type *) realloc(_ptr, (_nmemb) * sizeof(_type))) | |
33 | #define argpar_calloc(_type, _nmemb) ((_type *) calloc((_nmemb), sizeof(_type))) | |
34 | #define argpar_zalloc(_type) argpar_calloc(_type, 1) | |
35 | ||
36 | #define ARGPAR_ASSERT(_cond) assert(_cond) | |
37 | ||
38 | /* | |
39 | * Structure holding the argpar state between successive argpar_state_parse_next | |
40 | * calls. | |
41 | * | |
42 | * Created with `argpar_state_create` and destroyed with `argpar_state_destroy`. | |
43 | */ | |
44 | struct argpar_state { | |
45 | /* | |
46 | * Data provided by the user in argpar_state_create, does not change | |
47 | * afterwards. | |
48 | */ | |
49 | unsigned int argc; | |
50 | const char * const *argv; | |
51 | const struct argpar_opt_descr *descrs; | |
52 | ||
53 | /* | |
54 | * Index of the argument to process in the next argpar_state_parse_next | |
55 | * call. | |
56 | */ | |
57 | unsigned int i; | |
58 | ||
59 | /* Counter of non-option arguments. */ | |
60 | int non_opt_index; | |
61 | ||
62 | /* | |
63 | * Short option state: if set, we are in the middle of a short option | |
64 | * group, so we should resume there at the next argpar_state_parse_next | |
65 | * call. | |
66 | */ | |
67 | const char *short_opt_ch; | |
68 | }; | |
69 | ||
70 | static | |
71 | char *argpar_vasprintf(const char *fmt, va_list args) | |
72 | { | |
73 | int len1, len2; | |
74 | char *str; | |
75 | va_list args2; | |
76 | ||
77 | va_copy(args2, args); | |
78 | ||
79 | len1 = vsnprintf(NULL, 0, fmt, args); | |
80 | if (len1 < 0) { | |
81 | str = NULL; | |
82 | goto end; | |
83 | } | |
84 | ||
85 | str = malloc(len1 + 1); | |
86 | if (!str) { | |
87 | goto end; | |
88 | } | |
89 | ||
90 | len2 = vsnprintf(str, len1 + 1, fmt, args2); | |
91 | ||
92 | ARGPAR_ASSERT(len1 == len2); | |
93 | ||
94 | end: | |
95 | va_end(args2); | |
96 | return str; | |
97 | } | |
98 | ||
99 | ||
100 | static | |
101 | char *argpar_asprintf(const char *fmt, ...) | |
102 | { | |
103 | va_list args; | |
104 | char *str; | |
105 | ||
106 | va_start(args, fmt); | |
107 | str = argpar_vasprintf(fmt, args); | |
108 | va_end(args); | |
109 | ||
110 | return str; | |
111 | } | |
112 | ||
113 | static | |
114 | bool argpar_string_append_printf(char **str, const char *fmt, ...) | |
115 | { | |
116 | char *new_str = NULL; | |
117 | char *addendum; | |
118 | bool success; | |
119 | va_list args; | |
120 | ||
121 | ARGPAR_ASSERT(str); | |
122 | ||
123 | va_start(args, fmt); | |
124 | addendum = argpar_vasprintf(fmt, args); | |
125 | va_end(args); | |
126 | ||
127 | if (!addendum) { | |
128 | success = false; | |
129 | goto end; | |
130 | } | |
131 | ||
132 | new_str = argpar_asprintf("%s%s", *str ? *str : "", addendum); | |
133 | if (!new_str) { | |
134 | success = false; | |
135 | goto end; | |
136 | } | |
137 | ||
138 | free(*str); | |
139 | *str = new_str; | |
140 | ||
141 | success = true; | |
142 | ||
143 | end: | |
144 | free(addendum); | |
145 | ||
146 | return success; | |
147 | } | |
148 | ||
149 | ARGPAR_HIDDEN | |
150 | void argpar_item_destroy(struct argpar_item *item) | |
151 | { | |
152 | if (!item) { | |
153 | goto end; | |
154 | } | |
155 | ||
156 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
157 | struct argpar_item_opt * const opt_item = (void *) item; | |
158 | ||
159 | free((void *) opt_item->arg); | |
160 | } | |
161 | ||
162 | free(item); | |
163 | ||
164 | end: | |
165 | return; | |
166 | } | |
167 | ||
168 | static | |
169 | bool push_item(struct argpar_item_array * const array, | |
170 | struct argpar_item * const item) | |
171 | { | |
172 | bool success; | |
173 | ||
174 | ARGPAR_ASSERT(array); | |
175 | ARGPAR_ASSERT(item); | |
176 | ||
177 | if (array->n_items == array->n_alloc) { | |
178 | unsigned int new_n_alloc = array->n_alloc * 2; | |
179 | struct argpar_item **new_items; | |
180 | ||
181 | new_items = argpar_realloc(array->items, | |
182 | struct argpar_item *, new_n_alloc); | |
183 | if (!new_items) { | |
184 | success = false; | |
185 | goto end; | |
186 | } | |
187 | ||
188 | array->n_alloc = new_n_alloc; | |
189 | array->items = new_items; | |
190 | } | |
191 | ||
192 | array->items[array->n_items] = item; | |
193 | array->n_items++; | |
194 | ||
195 | success = true; | |
196 | ||
197 | end: | |
198 | return success; | |
199 | } | |
200 | ||
201 | static | |
202 | void destroy_item_array(struct argpar_item_array * const array) | |
203 | { | |
204 | if (array) { | |
205 | unsigned int i; | |
206 | ||
207 | for (i = 0; i < array->n_items; i++) { | |
208 | argpar_item_destroy(array->items[i]); | |
209 | } | |
210 | ||
211 | free(array->items); | |
212 | free(array); | |
213 | } | |
214 | } | |
215 | ||
216 | static | |
217 | struct argpar_item_array *new_item_array(void) | |
218 | { | |
219 | struct argpar_item_array *ret; | |
220 | const int initial_size = 10; | |
221 | ||
222 | ret = argpar_zalloc(struct argpar_item_array); | |
223 | if (!ret) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | ret->items = argpar_calloc(struct argpar_item *, initial_size); | |
228 | if (!ret->items) { | |
229 | goto error; | |
230 | } | |
231 | ||
232 | ret->n_alloc = initial_size; | |
233 | ||
234 | goto end; | |
235 | ||
236 | error: | |
237 | destroy_item_array(ret); | |
238 | ret = NULL; | |
239 | ||
240 | end: | |
241 | return ret; | |
242 | } | |
243 | ||
244 | static | |
245 | struct argpar_item_opt *create_opt_item( | |
246 | const struct argpar_opt_descr * const descr, | |
247 | const char * const arg) | |
248 | { | |
249 | struct argpar_item_opt *opt_item = | |
250 | argpar_zalloc(struct argpar_item_opt); | |
251 | ||
252 | if (!opt_item) { | |
253 | goto end; | |
254 | } | |
255 | ||
256 | opt_item->base.type = ARGPAR_ITEM_TYPE_OPT; | |
257 | opt_item->descr = descr; | |
258 | ||
259 | if (arg) { | |
260 | opt_item->arg = strdup(arg); | |
261 | if (!opt_item->arg) { | |
262 | goto error; | |
263 | } | |
264 | } | |
265 | ||
266 | goto end; | |
267 | ||
268 | error: | |
269 | argpar_item_destroy(&opt_item->base); | |
270 | opt_item = NULL; | |
271 | ||
272 | end: | |
273 | return opt_item; | |
274 | } | |
275 | ||
276 | static | |
277 | struct argpar_item_non_opt *create_non_opt_item(const char * const arg, | |
278 | const unsigned int orig_index, | |
279 | const unsigned int non_opt_index) | |
280 | { | |
281 | struct argpar_item_non_opt * const non_opt_item = | |
282 | argpar_zalloc(struct argpar_item_non_opt); | |
283 | ||
284 | if (!non_opt_item) { | |
285 | goto end; | |
286 | } | |
287 | ||
288 | non_opt_item->base.type = ARGPAR_ITEM_TYPE_NON_OPT; | |
289 | non_opt_item->arg = arg; | |
290 | non_opt_item->orig_index = orig_index; | |
291 | non_opt_item->non_opt_index = non_opt_index; | |
292 | ||
293 | end: | |
294 | return non_opt_item; | |
295 | } | |
296 | ||
297 | static | |
298 | const struct argpar_opt_descr *find_descr( | |
299 | const struct argpar_opt_descr * const descrs, | |
300 | const char short_name, const char * const long_name) | |
301 | { | |
302 | const struct argpar_opt_descr *descr; | |
303 | ||
304 | for (descr = descrs; descr->short_name || descr->long_name; descr++) { | |
305 | if (short_name && descr->short_name && | |
306 | short_name == descr->short_name) { | |
307 | goto end; | |
308 | } | |
309 | ||
310 | if (long_name && descr->long_name && | |
311 | strcmp(long_name, descr->long_name) == 0) { | |
312 | goto end; | |
313 | } | |
314 | } | |
315 | ||
316 | end: | |
317 | return !descr->short_name && !descr->long_name ? NULL : descr; | |
318 | } | |
319 | ||
320 | enum parse_orig_arg_opt_ret { | |
321 | PARSE_ORIG_ARG_OPT_RET_OK, | |
322 | PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT = -2, | |
323 | PARSE_ORIG_ARG_OPT_RET_ERROR = -1, | |
324 | }; | |
325 | ||
326 | static | |
327 | enum parse_orig_arg_opt_ret parse_short_opts(const char * const short_opts, | |
328 | const char * const next_orig_arg, | |
329 | const struct argpar_opt_descr * const descrs, | |
330 | struct argpar_state *state, | |
331 | char **error, | |
332 | struct argpar_item **item) | |
333 | { | |
334 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
335 | bool used_next_orig_arg = false; | |
336 | ||
337 | if (strlen(short_opts) == 0) { | |
338 | argpar_string_append_printf(error, "Invalid argument"); | |
339 | goto error; | |
340 | } | |
341 | ||
342 | if (!state->short_opt_ch) { | |
343 | state->short_opt_ch = short_opts; | |
344 | } | |
345 | ||
346 | const char *opt_arg = NULL; | |
347 | const struct argpar_opt_descr *descr; | |
348 | struct argpar_item_opt *opt_item; | |
349 | ||
350 | /* Find corresponding option descriptor */ | |
351 | descr = find_descr(descrs, *state->short_opt_ch, NULL); | |
352 | if (!descr) { | |
353 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
354 | argpar_string_append_printf(error, | |
355 | "Unknown option `-%c`", *state->short_opt_ch); | |
356 | goto error; | |
357 | } | |
358 | ||
359 | if (descr->with_arg) { | |
360 | if (state->short_opt_ch[1]) { | |
361 | /* `-oarg` form */ | |
362 | opt_arg = &state->short_opt_ch[1]; | |
363 | } else { | |
364 | /* `-o arg` form */ | |
365 | opt_arg = next_orig_arg; | |
366 | used_next_orig_arg = true; | |
367 | } | |
368 | ||
369 | /* | |
370 | * We accept `-o ''` (empty option's argument), | |
371 | * but not `-o` alone if an option's argument is | |
372 | * expected. | |
373 | */ | |
374 | if (!opt_arg || (state->short_opt_ch[1] && strlen(opt_arg) == 0)) { | |
375 | argpar_string_append_printf(error, | |
376 | "Missing required argument for option `-%c`", | |
377 | *state->short_opt_ch); | |
378 | used_next_orig_arg = false; | |
379 | goto error; | |
380 | } | |
381 | } | |
382 | ||
383 | /* Create and append option argument */ | |
384 | opt_item = create_opt_item(descr, opt_arg); | |
385 | if (!opt_item) { | |
386 | goto error; | |
387 | } | |
388 | ||
389 | *item = &opt_item->base; | |
390 | ||
391 | state->short_opt_ch++; | |
392 | ||
393 | if (descr->with_arg || !*state->short_opt_ch) { | |
394 | /* Option has an argument: no more options */ | |
395 | state->short_opt_ch = NULL; | |
396 | ||
397 | if (used_next_orig_arg) { | |
398 | state->i += 2; | |
399 | } else { | |
400 | state->i += 1; | |
401 | } | |
402 | } | |
403 | ||
404 | goto end; | |
405 | ||
406 | error: | |
407 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
408 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
409 | } | |
410 | ||
411 | end: | |
412 | return ret; | |
413 | } | |
414 | ||
415 | static | |
416 | enum parse_orig_arg_opt_ret parse_long_opt(const char * const long_opt_arg, | |
417 | const char * const next_orig_arg, | |
418 | const struct argpar_opt_descr * const descrs, | |
419 | struct argpar_state *state, | |
420 | char **error, | |
421 | struct argpar_item **item) | |
422 | { | |
423 | const size_t max_len = 127; | |
424 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
425 | const struct argpar_opt_descr *descr; | |
426 | struct argpar_item_opt *opt_item; | |
427 | bool used_next_orig_arg = false; | |
428 | ||
429 | /* Option's argument, if any */ | |
430 | const char *opt_arg = NULL; | |
431 | ||
432 | /* Position of first `=`, if any */ | |
433 | const char *eq_pos; | |
434 | ||
435 | /* Buffer holding option name when `long_opt_arg` contains `=` */ | |
436 | char buf[max_len + 1]; | |
437 | ||
438 | /* Option name */ | |
439 | const char *long_opt_name = long_opt_arg; | |
440 | ||
441 | if (strlen(long_opt_arg) == 0) { | |
442 | argpar_string_append_printf(error, | |
443 | "Invalid argument"); | |
444 | goto error; | |
445 | } | |
446 | ||
447 | /* Find the first `=` in original argument */ | |
448 | eq_pos = strchr(long_opt_arg, '='); | |
449 | if (eq_pos) { | |
450 | const size_t long_opt_name_size = eq_pos - long_opt_arg; | |
451 | ||
452 | /* Isolate the option name */ | |
453 | if (long_opt_name_size > max_len) { | |
454 | argpar_string_append_printf(error, | |
455 | "Invalid argument `--%s`", long_opt_arg); | |
456 | goto error; | |
457 | } | |
458 | ||
459 | memcpy(buf, long_opt_arg, long_opt_name_size); | |
460 | buf[long_opt_name_size] = '\0'; | |
461 | long_opt_name = buf; | |
462 | } | |
463 | ||
464 | /* Find corresponding option descriptor */ | |
465 | descr = find_descr(descrs, '\0', long_opt_name); | |
466 | if (!descr) { | |
467 | argpar_string_append_printf(error, | |
468 | "Unknown option `--%s`", long_opt_name); | |
469 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
470 | goto error; | |
471 | } | |
472 | ||
473 | /* Find option's argument if any */ | |
474 | if (descr->with_arg) { | |
475 | if (eq_pos) { | |
476 | /* `--long-opt=arg` style */ | |
477 | opt_arg = eq_pos + 1; | |
478 | } else { | |
479 | /* `--long-opt arg` style */ | |
480 | if (!next_orig_arg) { | |
481 | argpar_string_append_printf(error, | |
482 | "Missing required argument for option `--%s`", | |
483 | long_opt_name); | |
484 | goto error; | |
485 | } | |
486 | ||
487 | opt_arg = next_orig_arg; | |
488 | used_next_orig_arg = true; | |
489 | } | |
490 | } | |
491 | ||
492 | /* Create and append option argument */ | |
493 | opt_item = create_opt_item(descr, opt_arg); | |
494 | if (!opt_item) { | |
495 | goto error; | |
496 | } | |
497 | ||
498 | if (used_next_orig_arg) { | |
499 | state->i += 2; | |
500 | } else { | |
501 | state->i += 1; | |
502 | } | |
503 | ||
504 | *item = &opt_item->base; | |
505 | goto end; | |
506 | ||
507 | error: | |
508 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
509 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
510 | } | |
511 | ||
512 | end: | |
513 | return ret; | |
514 | } | |
515 | ||
516 | static | |
517 | enum parse_orig_arg_opt_ret parse_orig_arg_opt(const char * const orig_arg, | |
518 | const char * const next_orig_arg, | |
519 | const struct argpar_opt_descr * const descrs, | |
520 | struct argpar_state *state, | |
521 | char **error, | |
522 | struct argpar_item **item) | |
523 | { | |
524 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
525 | ||
526 | ARGPAR_ASSERT(orig_arg[0] == '-'); | |
527 | ||
528 | if (orig_arg[1] == '-') { | |
529 | /* Long option */ | |
530 | ret = parse_long_opt(&orig_arg[2], | |
531 | next_orig_arg, descrs, state, error, item); | |
532 | } else { | |
533 | /* Short option */ | |
534 | ret = parse_short_opts(&orig_arg[1], | |
535 | next_orig_arg, descrs, state, error, item); | |
536 | } | |
537 | ||
538 | return ret; | |
539 | } | |
540 | ||
541 | static | |
542 | bool prepend_while_parsing_arg_to_error(char **error, | |
543 | const unsigned int i, const char * const arg) | |
544 | { | |
545 | char *new_error; | |
546 | bool success; | |
547 | ||
548 | ARGPAR_ASSERT(error); | |
549 | ARGPAR_ASSERT(*error); | |
550 | ||
551 | new_error = argpar_asprintf("While parsing argument #%u (`%s`): %s", | |
552 | i + 1, arg, *error); | |
553 | if (!new_error) { | |
554 | success = false; | |
555 | goto end; | |
556 | } | |
557 | ||
558 | free(*error); | |
559 | *error = new_error; | |
560 | success = true; | |
561 | ||
562 | end: | |
563 | return success; | |
564 | } | |
565 | ||
566 | ARGPAR_HIDDEN | |
567 | struct argpar_state *argpar_state_create( | |
568 | unsigned int argc, | |
569 | const char * const *argv, | |
570 | const struct argpar_opt_descr * const descrs) | |
571 | { | |
572 | struct argpar_state *state; | |
573 | ||
574 | state = argpar_zalloc(struct argpar_state); | |
575 | if (!state) { | |
576 | goto end; | |
577 | } | |
578 | ||
579 | state->argc = argc; | |
580 | state->argv = argv; | |
581 | state->descrs = descrs; | |
582 | ||
583 | end: | |
584 | return state; | |
585 | } | |
586 | ||
587 | ARGPAR_HIDDEN | |
588 | void argpar_state_destroy(struct argpar_state *state) | |
589 | { | |
590 | free(state); | |
591 | } | |
592 | ||
593 | ARGPAR_HIDDEN | |
594 | enum argpar_state_parse_next_status argpar_state_parse_next( | |
595 | struct argpar_state *state, | |
596 | struct argpar_item **item, | |
597 | char **error) | |
598 | { | |
599 | enum argpar_state_parse_next_status status; | |
600 | ||
601 | ARGPAR_ASSERT(state->i <= state->argc); | |
602 | ||
603 | *error = NULL; | |
604 | ||
605 | if (state->i == state->argc) { | |
606 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_END; | |
607 | goto end; | |
608 | } | |
609 | ||
610 | enum parse_orig_arg_opt_ret parse_orig_arg_opt_ret; | |
611 | const char * const orig_arg = state->argv[state->i]; | |
612 | const char * const next_orig_arg = | |
613 | state->i < (state->argc - 1) ? state->argv[state->i + 1] : NULL; | |
614 | ||
615 | if (orig_arg[0] != '-') { | |
616 | /* Non-option argument */ | |
617 | struct argpar_item_non_opt *non_opt_item = | |
618 | create_non_opt_item(orig_arg, state->i, state->non_opt_index); | |
619 | ||
620 | if (!non_opt_item) { | |
621 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
622 | goto end; | |
623 | } | |
624 | ||
625 | state->non_opt_index++; | |
626 | state->i++; | |
627 | ||
628 | *item = &non_opt_item->base; | |
629 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | /* Option argument */ | |
634 | parse_orig_arg_opt_ret = parse_orig_arg_opt(orig_arg, | |
635 | next_orig_arg, state->descrs, state, error, item); | |
636 | switch (parse_orig_arg_opt_ret) { | |
637 | case PARSE_ORIG_ARG_OPT_RET_OK: | |
638 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
639 | break; | |
640 | case PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT: | |
641 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT; | |
642 | break;; | |
643 | case PARSE_ORIG_ARG_OPT_RET_ERROR: | |
644 | prepend_while_parsing_arg_to_error( | |
645 | error, state->i, orig_arg); | |
646 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
647 | break; | |
648 | default: | |
649 | abort(); | |
650 | } | |
651 | ||
652 | end: | |
653 | return status; | |
654 | } | |
655 | ||
656 | ARGPAR_HIDDEN | |
657 | int argpar_state_get_ingested_orig_args(struct argpar_state *state) | |
658 | { | |
659 | return state->i; | |
660 | } | |
661 | ||
662 | ARGPAR_HIDDEN | |
663 | struct argpar_parse_ret argpar_parse(unsigned int argc, | |
664 | const char * const *argv, | |
665 | const struct argpar_opt_descr * const descrs, | |
666 | bool fail_on_unknown_opt) | |
667 | { | |
668 | struct argpar_parse_ret parse_ret = { 0 }; | |
669 | struct argpar_item *item = NULL; | |
670 | struct argpar_state *state = NULL; | |
671 | ||
672 | parse_ret.items = new_item_array(); | |
673 | if (!parse_ret.items) { | |
674 | parse_ret.error = strdup("Failed to create items array."); | |
675 | ARGPAR_ASSERT(parse_ret.error); | |
676 | goto error; | |
677 | } | |
678 | ||
679 | state = argpar_state_create(argc, argv, descrs); | |
680 | if (!state) { | |
681 | parse_ret.error = strdup("Failed to create argpar state."); | |
682 | ARGPAR_ASSERT(parse_ret.error); | |
683 | goto error; | |
684 | } | |
685 | ||
686 | while (true) { | |
687 | enum argpar_state_parse_next_status status; | |
688 | ||
689 | status = argpar_state_parse_next(state, &item, &parse_ret.error); | |
690 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
691 | goto error; | |
692 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
693 | break; | |
694 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
695 | if (fail_on_unknown_opt) { | |
696 | parse_ret.ingested_orig_args = | |
697 | argpar_state_get_ingested_orig_args(state); | |
698 | prepend_while_parsing_arg_to_error( | |
699 | &parse_ret.error, parse_ret.ingested_orig_args, | |
700 | argv[parse_ret.ingested_orig_args]); | |
701 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
702 | goto error; | |
703 | } | |
704 | ||
705 | free(parse_ret.error); | |
706 | parse_ret.error = NULL; | |
707 | break; | |
708 | } | |
709 | ||
710 | ARGPAR_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
711 | ||
712 | if (!push_item(parse_ret.items, item)) { | |
713 | goto error; | |
714 | } | |
715 | item = NULL; | |
716 | } | |
717 | ||
718 | ARGPAR_ASSERT(!parse_ret.error); | |
719 | parse_ret.ingested_orig_args = | |
720 | argpar_state_get_ingested_orig_args(state); | |
721 | goto end; | |
722 | ||
723 | error: | |
724 | ARGPAR_ASSERT(parse_ret.error); | |
725 | ||
726 | /* That's how we indicate that an error occured */ | |
727 | destroy_item_array(parse_ret.items); | |
728 | parse_ret.items = NULL; | |
729 | ||
730 | end: | |
731 | argpar_state_destroy(state); | |
732 | argpar_item_destroy(item); | |
733 | return parse_ret; | |
734 | } | |
735 | ||
736 | ARGPAR_HIDDEN | |
737 | void argpar_parse_ret_fini(struct argpar_parse_ret *ret) | |
738 | { | |
739 | ARGPAR_ASSERT(ret); | |
740 | ||
741 | destroy_item_array(ret->items); | |
742 | ret->items = NULL; | |
743 | ||
744 | free(ret->error); | |
745 | ret->error = NULL; | |
746 | } |