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e2fb96d8 SM |
1 | /* |
2 | * SPDX-License-Identifier: MIT | |
3 | * | |
4 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> | |
5 | */ | |
6 | ||
7 | #include <assert.h> | |
8 | #include <stdarg.h> | |
9 | #include <stdbool.h> | |
10 | #include <stdio.h> | |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | ||
14 | #include "argpar.h" | |
15 | ||
16 | #define argpar_realloc(_ptr, _type, _nmemb) ((_type *) realloc(_ptr, (_nmemb) * sizeof(_type))) | |
17 | #define argpar_calloc(_type, _nmemb) ((_type *) calloc((_nmemb), sizeof(_type))) | |
18 | #define argpar_zalloc(_type) argpar_calloc(_type, 1) | |
19 | ||
20 | #define ARGPAR_ASSERT(_cond) assert(_cond) | |
21 | ||
22 | #ifdef __MINGW_PRINTF_FORMAT | |
23 | # define ARGPAR_PRINTF_FORMAT __MINGW_PRINTF_FORMAT | |
24 | #else | |
25 | # define ARGPAR_PRINTF_FORMAT printf | |
26 | #endif | |
27 | ||
4624dad0 SM |
28 | /* |
29 | * Structure holding the argpar state between successive argpar_state_parse_next | |
30 | * calls. | |
31 | * | |
32 | * Created with `argpar_state_create` and destroyed with `argpar_state_destroy`. | |
33 | */ | |
34 | struct argpar_state { | |
35 | /* | |
36 | * Data provided by the user in argpar_state_create, does not change | |
37 | * afterwards. | |
38 | */ | |
39 | unsigned int argc; | |
40 | const char * const *argv; | |
41 | const struct argpar_opt_descr *descrs; | |
42 | ||
43 | /* | |
44 | * Index of the argument to process in the next argpar_state_parse_next | |
45 | * call. | |
46 | */ | |
47 | unsigned int i; | |
48 | ||
49 | /* Counter of non-option arguments. */ | |
50 | int non_opt_index; | |
51 | ||
52 | /* | |
53 | * Short option state: if set, we are in the middle of a short option | |
54 | * group, so we should resume there at the next argpar_state_parse_next | |
55 | * call. | |
56 | */ | |
57 | const char *short_opt_ch; | |
58 | }; | |
59 | ||
e2fb96d8 SM |
60 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 0))) |
61 | char *argpar_vasprintf(const char *fmt, va_list args) | |
62 | { | |
63 | int len1, len2; | |
64 | char *str; | |
65 | va_list args2; | |
66 | ||
67 | va_copy(args2, args); | |
68 | ||
69 | len1 = vsnprintf(NULL, 0, fmt, args); | |
70 | if (len1 < 0) { | |
71 | str = NULL; | |
72 | goto end; | |
73 | } | |
74 | ||
75 | str = malloc(len1 + 1); | |
76 | if (!str) { | |
77 | goto end; | |
78 | } | |
79 | ||
80 | len2 = vsnprintf(str, len1 + 1, fmt, args2); | |
81 | ||
82 | ARGPAR_ASSERT(len1 == len2); | |
83 | ||
84 | end: | |
85 | va_end(args2); | |
86 | return str; | |
87 | } | |
88 | ||
89 | ||
90 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 2))) | |
91 | char *argpar_asprintf(const char *fmt, ...) | |
92 | { | |
93 | va_list args; | |
94 | char *str; | |
95 | ||
96 | va_start(args, fmt); | |
97 | str = argpar_vasprintf(fmt, args); | |
98 | va_end(args); | |
99 | ||
100 | return str; | |
101 | } | |
102 | ||
103 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 2, 3))) | |
104 | bool argpar_string_append_printf(char **str, const char *fmt, ...) | |
105 | { | |
106 | char *new_str = NULL; | |
107 | char *addendum; | |
108 | bool success; | |
109 | va_list args; | |
110 | ||
111 | ARGPAR_ASSERT(str); | |
112 | ||
113 | va_start(args, fmt); | |
114 | addendum = argpar_vasprintf(fmt, args); | |
115 | va_end(args); | |
116 | ||
117 | if (!addendum) { | |
118 | success = false; | |
119 | goto end; | |
120 | } | |
121 | ||
122 | new_str = argpar_asprintf("%s%s", *str ? *str : "", addendum); | |
123 | if (!new_str) { | |
124 | success = false; | |
125 | goto end; | |
126 | } | |
127 | ||
128 | free(*str); | |
129 | *str = new_str; | |
130 | ||
131 | success = true; | |
132 | ||
133 | end: | |
134 | free(addendum); | |
135 | ||
136 | return success; | |
137 | } | |
138 | ||
4624dad0 SM |
139 | ARGPAR_HIDDEN |
140 | void argpar_item_destroy(struct argpar_item *item) | |
e2fb96d8 SM |
141 | { |
142 | if (!item) { | |
143 | goto end; | |
144 | } | |
145 | ||
146 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
147 | struct argpar_item_opt * const opt_item = (void *) item; | |
148 | ||
149 | free((void *) opt_item->arg); | |
150 | } | |
151 | ||
152 | free(item); | |
153 | ||
154 | end: | |
155 | return; | |
156 | } | |
157 | ||
158 | static | |
159 | bool push_item(struct argpar_item_array * const array, | |
160 | struct argpar_item * const item) | |
161 | { | |
162 | bool success; | |
163 | ||
164 | ARGPAR_ASSERT(array); | |
165 | ARGPAR_ASSERT(item); | |
166 | ||
167 | if (array->n_items == array->n_alloc) { | |
168 | unsigned int new_n_alloc = array->n_alloc * 2; | |
169 | struct argpar_item **new_items; | |
170 | ||
171 | new_items = argpar_realloc(array->items, | |
172 | struct argpar_item *, new_n_alloc); | |
173 | if (!new_items) { | |
174 | success = false; | |
175 | goto end; | |
176 | } | |
177 | ||
178 | array->n_alloc = new_n_alloc; | |
179 | array->items = new_items; | |
180 | } | |
181 | ||
182 | array->items[array->n_items] = item; | |
183 | array->n_items++; | |
184 | ||
185 | success = true; | |
186 | ||
187 | end: | |
188 | return success; | |
189 | } | |
190 | ||
191 | static | |
192 | void destroy_item_array(struct argpar_item_array * const array) | |
193 | { | |
194 | if (array) { | |
195 | unsigned int i; | |
196 | ||
197 | for (i = 0; i < array->n_items; i++) { | |
4624dad0 | 198 | argpar_item_destroy(array->items[i]); |
e2fb96d8 SM |
199 | } |
200 | ||
201 | free(array->items); | |
202 | free(array); | |
203 | } | |
204 | } | |
205 | ||
206 | static | |
207 | struct argpar_item_array *new_item_array(void) | |
208 | { | |
209 | struct argpar_item_array *ret; | |
210 | const int initial_size = 10; | |
211 | ||
212 | ret = argpar_zalloc(struct argpar_item_array); | |
213 | if (!ret) { | |
214 | goto end; | |
215 | } | |
216 | ||
217 | ret->items = argpar_calloc(struct argpar_item *, initial_size); | |
218 | if (!ret->items) { | |
219 | goto error; | |
220 | } | |
221 | ||
222 | ret->n_alloc = initial_size; | |
223 | ||
224 | goto end; | |
225 | ||
226 | error: | |
227 | destroy_item_array(ret); | |
228 | ret = NULL; | |
229 | ||
230 | end: | |
231 | return ret; | |
232 | } | |
233 | ||
234 | static | |
235 | struct argpar_item_opt *create_opt_item( | |
236 | const struct argpar_opt_descr * const descr, | |
237 | const char * const arg) | |
238 | { | |
239 | struct argpar_item_opt *opt_item = | |
240 | argpar_zalloc(struct argpar_item_opt); | |
241 | ||
242 | if (!opt_item) { | |
243 | goto end; | |
244 | } | |
245 | ||
246 | opt_item->base.type = ARGPAR_ITEM_TYPE_OPT; | |
247 | opt_item->descr = descr; | |
248 | ||
249 | if (arg) { | |
250 | opt_item->arg = strdup(arg); | |
251 | if (!opt_item->arg) { | |
252 | goto error; | |
253 | } | |
254 | } | |
255 | ||
256 | goto end; | |
257 | ||
258 | error: | |
4624dad0 | 259 | argpar_item_destroy(&opt_item->base); |
e2fb96d8 SM |
260 | opt_item = NULL; |
261 | ||
262 | end: | |
263 | return opt_item; | |
264 | } | |
265 | ||
266 | static | |
267 | struct argpar_item_non_opt *create_non_opt_item(const char * const arg, | |
268 | const unsigned int orig_index, | |
269 | const unsigned int non_opt_index) | |
270 | { | |
271 | struct argpar_item_non_opt * const non_opt_item = | |
272 | argpar_zalloc(struct argpar_item_non_opt); | |
273 | ||
274 | if (!non_opt_item) { | |
275 | goto end; | |
276 | } | |
277 | ||
278 | non_opt_item->base.type = ARGPAR_ITEM_TYPE_NON_OPT; | |
279 | non_opt_item->arg = arg; | |
280 | non_opt_item->orig_index = orig_index; | |
281 | non_opt_item->non_opt_index = non_opt_index; | |
282 | ||
283 | end: | |
284 | return non_opt_item; | |
285 | } | |
286 | ||
287 | static | |
288 | const struct argpar_opt_descr *find_descr( | |
289 | const struct argpar_opt_descr * const descrs, | |
290 | const char short_name, const char * const long_name) | |
291 | { | |
292 | const struct argpar_opt_descr *descr; | |
293 | ||
294 | for (descr = descrs; descr->short_name || descr->long_name; descr++) { | |
295 | if (short_name && descr->short_name && | |
296 | short_name == descr->short_name) { | |
297 | goto end; | |
298 | } | |
299 | ||
300 | if (long_name && descr->long_name && | |
301 | strcmp(long_name, descr->long_name) == 0) { | |
302 | goto end; | |
303 | } | |
304 | } | |
305 | ||
306 | end: | |
307 | return !descr->short_name && !descr->long_name ? NULL : descr; | |
308 | } | |
309 | ||
310 | enum parse_orig_arg_opt_ret { | |
311 | PARSE_ORIG_ARG_OPT_RET_OK, | |
312 | PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT = -2, | |
313 | PARSE_ORIG_ARG_OPT_RET_ERROR = -1, | |
314 | }; | |
315 | ||
316 | static | |
317 | enum parse_orig_arg_opt_ret parse_short_opts(const char * const short_opts, | |
318 | const char * const next_orig_arg, | |
319 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
320 | struct argpar_state *state, |
321 | char **error, | |
322 | struct argpar_item **item) | |
e2fb96d8 SM |
323 | { |
324 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
4624dad0 | 325 | bool used_next_orig_arg = false; |
e2fb96d8 SM |
326 | |
327 | if (strlen(short_opts) == 0) { | |
4624dad0 | 328 | argpar_string_append_printf(error, "Invalid argument"); |
e2fb96d8 SM |
329 | goto error; |
330 | } | |
331 | ||
4624dad0 SM |
332 | if (!state->short_opt_ch) { |
333 | state->short_opt_ch = short_opts; | |
334 | } | |
e2fb96d8 | 335 | |
4624dad0 SM |
336 | const char *opt_arg = NULL; |
337 | const struct argpar_opt_descr *descr; | |
338 | struct argpar_item_opt *opt_item; | |
e2fb96d8 | 339 | |
4624dad0 SM |
340 | /* Find corresponding option descriptor */ |
341 | descr = find_descr(descrs, *state->short_opt_ch, NULL); | |
342 | if (!descr) { | |
343 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
344 | argpar_string_append_printf(error, | |
345 | "Unknown option `-%c`", *state->short_opt_ch); | |
346 | goto error; | |
347 | } | |
e2fb96d8 | 348 | |
4624dad0 SM |
349 | if (descr->with_arg) { |
350 | if (state->short_opt_ch[1]) { | |
351 | /* `-oarg` form */ | |
352 | opt_arg = &state->short_opt_ch[1]; | |
353 | } else { | |
354 | /* `-o arg` form */ | |
355 | opt_arg = next_orig_arg; | |
356 | used_next_orig_arg = true; | |
e2fb96d8 SM |
357 | } |
358 | ||
4624dad0 SM |
359 | /* |
360 | * We accept `-o ''` (empty option's argument), | |
361 | * but not `-o` alone if an option's argument is | |
362 | * expected. | |
363 | */ | |
364 | if (!opt_arg || (state->short_opt_ch[1] && strlen(opt_arg) == 0)) { | |
365 | argpar_string_append_printf(error, | |
366 | "Missing required argument for option `-%c`", | |
367 | *state->short_opt_ch); | |
368 | used_next_orig_arg = false; | |
e2fb96d8 SM |
369 | goto error; |
370 | } | |
4624dad0 | 371 | } |
e2fb96d8 | 372 | |
4624dad0 SM |
373 | /* Create and append option argument */ |
374 | opt_item = create_opt_item(descr, opt_arg); | |
375 | if (!opt_item) { | |
376 | goto error; | |
377 | } | |
e2fb96d8 | 378 | |
4624dad0 | 379 | *item = &opt_item->base; |
e2fb96d8 | 380 | |
4624dad0 SM |
381 | state->short_opt_ch++; |
382 | ||
383 | if (descr->with_arg || !*state->short_opt_ch) { | |
384 | /* Option has an argument: no more options */ | |
385 | state->short_opt_ch = NULL; | |
386 | ||
387 | if (used_next_orig_arg) { | |
388 | state->i += 2; | |
389 | } else { | |
390 | state->i += 1; | |
391 | } | |
e2fb96d8 SM |
392 | } |
393 | ||
394 | goto end; | |
395 | ||
396 | error: | |
397 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
398 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
399 | } | |
400 | ||
401 | end: | |
402 | return ret; | |
403 | } | |
404 | ||
405 | static | |
406 | enum parse_orig_arg_opt_ret parse_long_opt(const char * const long_opt_arg, | |
407 | const char * const next_orig_arg, | |
408 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
409 | struct argpar_state *state, |
410 | char **error, | |
411 | struct argpar_item **item) | |
e2fb96d8 SM |
412 | { |
413 | const size_t max_len = 127; | |
414 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
415 | const struct argpar_opt_descr *descr; | |
416 | struct argpar_item_opt *opt_item; | |
4624dad0 | 417 | bool used_next_orig_arg = false; |
e2fb96d8 SM |
418 | |
419 | /* Option's argument, if any */ | |
420 | const char *opt_arg = NULL; | |
421 | ||
422 | /* Position of first `=`, if any */ | |
423 | const char *eq_pos; | |
424 | ||
425 | /* Buffer holding option name when `long_opt_arg` contains `=` */ | |
426 | char buf[max_len + 1]; | |
427 | ||
428 | /* Option name */ | |
429 | const char *long_opt_name = long_opt_arg; | |
430 | ||
431 | if (strlen(long_opt_arg) == 0) { | |
4624dad0 | 432 | argpar_string_append_printf(error, |
e2fb96d8 SM |
433 | "Invalid argument"); |
434 | goto error; | |
435 | } | |
436 | ||
437 | /* Find the first `=` in original argument */ | |
438 | eq_pos = strchr(long_opt_arg, '='); | |
439 | if (eq_pos) { | |
440 | const size_t long_opt_name_size = eq_pos - long_opt_arg; | |
441 | ||
442 | /* Isolate the option name */ | |
443 | if (long_opt_name_size > max_len) { | |
4624dad0 | 444 | argpar_string_append_printf(error, |
e2fb96d8 SM |
445 | "Invalid argument `--%s`", long_opt_arg); |
446 | goto error; | |
447 | } | |
448 | ||
449 | memcpy(buf, long_opt_arg, long_opt_name_size); | |
450 | buf[long_opt_name_size] = '\0'; | |
451 | long_opt_name = buf; | |
452 | } | |
453 | ||
454 | /* Find corresponding option descriptor */ | |
455 | descr = find_descr(descrs, '\0', long_opt_name); | |
456 | if (!descr) { | |
4624dad0 | 457 | argpar_string_append_printf(error, |
e2fb96d8 SM |
458 | "Unknown option `--%s`", long_opt_name); |
459 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
460 | goto error; | |
461 | } | |
462 | ||
463 | /* Find option's argument if any */ | |
464 | if (descr->with_arg) { | |
465 | if (eq_pos) { | |
466 | /* `--long-opt=arg` style */ | |
467 | opt_arg = eq_pos + 1; | |
468 | } else { | |
469 | /* `--long-opt arg` style */ | |
470 | if (!next_orig_arg) { | |
4624dad0 | 471 | argpar_string_append_printf(error, |
e2fb96d8 SM |
472 | "Missing required argument for option `--%s`", |
473 | long_opt_name); | |
474 | goto error; | |
475 | } | |
476 | ||
477 | opt_arg = next_orig_arg; | |
4624dad0 | 478 | used_next_orig_arg = true; |
e2fb96d8 | 479 | } |
ebdbbd32 SM |
480 | } else if (eq_pos) { |
481 | /* | |
482 | * Unexpected `--opt=arg` style for a long option which | |
483 | * doesn't accept an argument. | |
484 | */ | |
485 | argpar_string_append_printf(error, | |
486 | "Unexpected argument for option `--%s`", | |
487 | long_opt_name); | |
488 | goto error; | |
e2fb96d8 SM |
489 | } |
490 | ||
491 | /* Create and append option argument */ | |
492 | opt_item = create_opt_item(descr, opt_arg); | |
493 | if (!opt_item) { | |
494 | goto error; | |
495 | } | |
496 | ||
4624dad0 SM |
497 | if (used_next_orig_arg) { |
498 | state->i += 2; | |
499 | } else { | |
500 | state->i += 1; | |
e2fb96d8 SM |
501 | } |
502 | ||
4624dad0 | 503 | *item = &opt_item->base; |
e2fb96d8 SM |
504 | goto end; |
505 | ||
506 | error: | |
507 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
508 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
509 | } | |
510 | ||
511 | end: | |
512 | return ret; | |
513 | } | |
514 | ||
515 | static | |
516 | enum parse_orig_arg_opt_ret parse_orig_arg_opt(const char * const orig_arg, | |
517 | const char * const next_orig_arg, | |
518 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
519 | struct argpar_state *state, |
520 | char **error, | |
521 | struct argpar_item **item) | |
e2fb96d8 SM |
522 | { |
523 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
524 | ||
525 | ARGPAR_ASSERT(orig_arg[0] == '-'); | |
526 | ||
527 | if (orig_arg[1] == '-') { | |
528 | /* Long option */ | |
529 | ret = parse_long_opt(&orig_arg[2], | |
4624dad0 | 530 | next_orig_arg, descrs, state, error, item); |
e2fb96d8 SM |
531 | } else { |
532 | /* Short option */ | |
533 | ret = parse_short_opts(&orig_arg[1], | |
4624dad0 | 534 | next_orig_arg, descrs, state, error, item); |
e2fb96d8 SM |
535 | } |
536 | ||
537 | return ret; | |
538 | } | |
539 | ||
540 | static | |
541 | bool prepend_while_parsing_arg_to_error(char **error, | |
542 | const unsigned int i, const char * const arg) | |
543 | { | |
544 | char *new_error; | |
545 | bool success; | |
546 | ||
547 | ARGPAR_ASSERT(error); | |
548 | ARGPAR_ASSERT(*error); | |
549 | ||
550 | new_error = argpar_asprintf("While parsing argument #%u (`%s`): %s", | |
551 | i + 1, arg, *error); | |
552 | if (!new_error) { | |
553 | success = false; | |
554 | goto end; | |
555 | } | |
556 | ||
557 | free(*error); | |
558 | *error = new_error; | |
559 | success = true; | |
560 | ||
561 | end: | |
562 | return success; | |
563 | } | |
564 | ||
4624dad0 SM |
565 | ARGPAR_HIDDEN |
566 | struct argpar_state *argpar_state_create( | |
567 | unsigned int argc, | |
568 | const char * const *argv, | |
569 | const struct argpar_opt_descr * const descrs) | |
570 | { | |
571 | struct argpar_state *state; | |
572 | ||
573 | state = argpar_zalloc(struct argpar_state); | |
574 | if (!state) { | |
575 | goto end; | |
576 | } | |
577 | ||
578 | state->argc = argc; | |
579 | state->argv = argv; | |
580 | state->descrs = descrs; | |
581 | ||
582 | end: | |
583 | return state; | |
584 | } | |
585 | ||
586 | ARGPAR_HIDDEN | |
587 | void argpar_state_destroy(struct argpar_state *state) | |
588 | { | |
589 | free(state); | |
590 | } | |
591 | ||
592 | ARGPAR_HIDDEN | |
593 | enum argpar_state_parse_next_status argpar_state_parse_next( | |
594 | struct argpar_state *state, | |
595 | struct argpar_item **item, | |
596 | char **error) | |
597 | { | |
598 | enum argpar_state_parse_next_status status; | |
599 | ||
600 | ARGPAR_ASSERT(state->i <= state->argc); | |
601 | ||
602 | *error = NULL; | |
603 | ||
604 | if (state->i == state->argc) { | |
605 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_END; | |
606 | goto end; | |
607 | } | |
608 | ||
609 | enum parse_orig_arg_opt_ret parse_orig_arg_opt_ret; | |
610 | const char * const orig_arg = state->argv[state->i]; | |
611 | const char * const next_orig_arg = | |
612 | state->i < (state->argc - 1) ? state->argv[state->i + 1] : NULL; | |
613 | ||
614 | if (orig_arg[0] != '-') { | |
615 | /* Non-option argument */ | |
616 | struct argpar_item_non_opt *non_opt_item = | |
617 | create_non_opt_item(orig_arg, state->i, state->non_opt_index); | |
618 | ||
619 | if (!non_opt_item) { | |
620 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
621 | goto end; | |
622 | } | |
623 | ||
624 | state->non_opt_index++; | |
625 | state->i++; | |
626 | ||
627 | *item = &non_opt_item->base; | |
628 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
629 | goto end; | |
630 | } | |
631 | ||
632 | /* Option argument */ | |
633 | parse_orig_arg_opt_ret = parse_orig_arg_opt(orig_arg, | |
634 | next_orig_arg, state->descrs, state, error, item); | |
635 | switch (parse_orig_arg_opt_ret) { | |
636 | case PARSE_ORIG_ARG_OPT_RET_OK: | |
637 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
638 | break; | |
639 | case PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT: | |
640 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT; | |
641 | break;; | |
642 | case PARSE_ORIG_ARG_OPT_RET_ERROR: | |
643 | prepend_while_parsing_arg_to_error( | |
644 | error, state->i, orig_arg); | |
645 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
646 | break; | |
647 | default: | |
648 | abort(); | |
649 | } | |
650 | ||
651 | end: | |
652 | return status; | |
653 | } | |
654 | ||
655 | ARGPAR_HIDDEN | |
656 | int argpar_state_get_ingested_orig_args(struct argpar_state *state) | |
657 | { | |
658 | return state->i; | |
659 | } | |
660 | ||
e2fb96d8 SM |
661 | ARGPAR_HIDDEN |
662 | struct argpar_parse_ret argpar_parse(unsigned int argc, | |
663 | const char * const *argv, | |
664 | const struct argpar_opt_descr * const descrs, | |
665 | bool fail_on_unknown_opt) | |
666 | { | |
667 | struct argpar_parse_ret parse_ret = { 0 }; | |
4624dad0 SM |
668 | struct argpar_item *item = NULL; |
669 | struct argpar_state *state = NULL; | |
e2fb96d8 SM |
670 | |
671 | parse_ret.items = new_item_array(); | |
672 | if (!parse_ret.items) { | |
4624dad0 SM |
673 | parse_ret.error = strdup("Failed to create items array."); |
674 | ARGPAR_ASSERT(parse_ret.error); | |
e2fb96d8 SM |
675 | goto error; |
676 | } | |
677 | ||
4624dad0 SM |
678 | state = argpar_state_create(argc, argv, descrs); |
679 | if (!state) { | |
680 | parse_ret.error = strdup("Failed to create argpar state."); | |
681 | ARGPAR_ASSERT(parse_ret.error); | |
682 | goto error; | |
683 | } | |
e2fb96d8 | 684 | |
4624dad0 SM |
685 | while (true) { |
686 | enum argpar_state_parse_next_status status; | |
e2fb96d8 | 687 | |
4624dad0 SM |
688 | status = argpar_state_parse_next(state, &item, &parse_ret.error); |
689 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
690 | goto error; | |
691 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
e2fb96d8 | 692 | break; |
4624dad0 | 693 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
e2fb96d8 | 694 | if (fail_on_unknown_opt) { |
4624dad0 SM |
695 | parse_ret.ingested_orig_args = |
696 | argpar_state_get_ingested_orig_args(state); | |
e2fb96d8 | 697 | prepend_while_parsing_arg_to_error( |
4624dad0 SM |
698 | &parse_ret.error, parse_ret.ingested_orig_args, |
699 | argv[parse_ret.ingested_orig_args]); | |
700 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
e2fb96d8 SM |
701 | goto error; |
702 | } | |
703 | ||
e2fb96d8 SM |
704 | free(parse_ret.error); |
705 | parse_ret.error = NULL; | |
4624dad0 | 706 | break; |
e2fb96d8 SM |
707 | } |
708 | ||
4624dad0 SM |
709 | ARGPAR_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
710 | ||
711 | if (!push_item(parse_ret.items, item)) { | |
712 | goto error; | |
e2fb96d8 | 713 | } |
4624dad0 | 714 | item = NULL; |
e2fb96d8 SM |
715 | } |
716 | ||
4624dad0 SM |
717 | ARGPAR_ASSERT(!parse_ret.error); |
718 | parse_ret.ingested_orig_args = | |
719 | argpar_state_get_ingested_orig_args(state); | |
e2fb96d8 SM |
720 | goto end; |
721 | ||
722 | error: | |
4624dad0 SM |
723 | ARGPAR_ASSERT(parse_ret.error); |
724 | ||
e2fb96d8 SM |
725 | /* That's how we indicate that an error occurred */ |
726 | destroy_item_array(parse_ret.items); | |
727 | parse_ret.items = NULL; | |
728 | ||
729 | end: | |
4624dad0 SM |
730 | argpar_state_destroy(state); |
731 | argpar_item_destroy(item); | |
e2fb96d8 SM |
732 | return parse_ret; |
733 | } | |
734 | ||
735 | ARGPAR_HIDDEN | |
736 | void argpar_parse_ret_fini(struct argpar_parse_ret *ret) | |
737 | { | |
738 | ARGPAR_ASSERT(ret); | |
739 | ||
740 | destroy_item_array(ret->items); | |
741 | ret->items = NULL; | |
742 | ||
743 | free(ret->error); | |
744 | ret->error = NULL; | |
745 | } |