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e2fb96d8 SM |
1 | /* |
2 | * SPDX-License-Identifier: MIT | |
3 | * | |
4 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> | |
5 | */ | |
6 | ||
e2fb96d8 SM |
7 | #include <stdarg.h> |
8 | #include <stdbool.h> | |
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | ||
13 | #include "argpar.h" | |
14 | ||
15 | #define argpar_realloc(_ptr, _type, _nmemb) ((_type *) realloc(_ptr, (_nmemb) * sizeof(_type))) | |
16 | #define argpar_calloc(_type, _nmemb) ((_type *) calloc((_nmemb), sizeof(_type))) | |
17 | #define argpar_zalloc(_type) argpar_calloc(_type, 1) | |
18 | ||
a0377dfe | 19 | #define ARGPAR_ASSERT(_cond) ((void) sizeof((void) (_cond), 0)) |
e2fb96d8 SM |
20 | |
21 | #ifdef __MINGW_PRINTF_FORMAT | |
22 | # define ARGPAR_PRINTF_FORMAT __MINGW_PRINTF_FORMAT | |
23 | #else | |
24 | # define ARGPAR_PRINTF_FORMAT printf | |
25 | #endif | |
26 | ||
4624dad0 SM |
27 | /* |
28 | * Structure holding the argpar state between successive argpar_state_parse_next | |
29 | * calls. | |
30 | * | |
31 | * Created with `argpar_state_create` and destroyed with `argpar_state_destroy`. | |
32 | */ | |
33 | struct argpar_state { | |
34 | /* | |
35 | * Data provided by the user in argpar_state_create, does not change | |
36 | * afterwards. | |
37 | */ | |
38 | unsigned int argc; | |
39 | const char * const *argv; | |
40 | const struct argpar_opt_descr *descrs; | |
41 | ||
42 | /* | |
43 | * Index of the argument to process in the next argpar_state_parse_next | |
44 | * call. | |
45 | */ | |
46 | unsigned int i; | |
47 | ||
48 | /* Counter of non-option arguments. */ | |
49 | int non_opt_index; | |
50 | ||
51 | /* | |
52 | * Short option state: if set, we are in the middle of a short option | |
53 | * group, so we should resume there at the next argpar_state_parse_next | |
54 | * call. | |
55 | */ | |
56 | const char *short_opt_ch; | |
57 | }; | |
58 | ||
e2fb96d8 SM |
59 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 0))) |
60 | char *argpar_vasprintf(const char *fmt, va_list args) | |
61 | { | |
62 | int len1, len2; | |
63 | char *str; | |
64 | va_list args2; | |
65 | ||
66 | va_copy(args2, args); | |
67 | ||
68 | len1 = vsnprintf(NULL, 0, fmt, args); | |
69 | if (len1 < 0) { | |
70 | str = NULL; | |
71 | goto end; | |
72 | } | |
73 | ||
74 | str = malloc(len1 + 1); | |
75 | if (!str) { | |
76 | goto end; | |
77 | } | |
78 | ||
79 | len2 = vsnprintf(str, len1 + 1, fmt, args2); | |
80 | ||
81 | ARGPAR_ASSERT(len1 == len2); | |
82 | ||
83 | end: | |
84 | va_end(args2); | |
85 | return str; | |
86 | } | |
87 | ||
88 | ||
89 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 2))) | |
90 | char *argpar_asprintf(const char *fmt, ...) | |
91 | { | |
92 | va_list args; | |
93 | char *str; | |
94 | ||
95 | va_start(args, fmt); | |
96 | str = argpar_vasprintf(fmt, args); | |
97 | va_end(args); | |
98 | ||
99 | return str; | |
100 | } | |
101 | ||
102 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 2, 3))) | |
103 | bool argpar_string_append_printf(char **str, const char *fmt, ...) | |
104 | { | |
105 | char *new_str = NULL; | |
106 | char *addendum; | |
107 | bool success; | |
108 | va_list args; | |
109 | ||
110 | ARGPAR_ASSERT(str); | |
111 | ||
112 | va_start(args, fmt); | |
113 | addendum = argpar_vasprintf(fmt, args); | |
114 | va_end(args); | |
115 | ||
116 | if (!addendum) { | |
117 | success = false; | |
118 | goto end; | |
119 | } | |
120 | ||
121 | new_str = argpar_asprintf("%s%s", *str ? *str : "", addendum); | |
122 | if (!new_str) { | |
123 | success = false; | |
124 | goto end; | |
125 | } | |
126 | ||
127 | free(*str); | |
128 | *str = new_str; | |
129 | ||
130 | success = true; | |
131 | ||
132 | end: | |
133 | free(addendum); | |
134 | ||
135 | return success; | |
136 | } | |
137 | ||
4624dad0 SM |
138 | ARGPAR_HIDDEN |
139 | void argpar_item_destroy(struct argpar_item *item) | |
e2fb96d8 SM |
140 | { |
141 | if (!item) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
146 | struct argpar_item_opt * const opt_item = (void *) item; | |
147 | ||
148 | free((void *) opt_item->arg); | |
149 | } | |
150 | ||
151 | free(item); | |
152 | ||
153 | end: | |
154 | return; | |
155 | } | |
156 | ||
157 | static | |
158 | bool push_item(struct argpar_item_array * const array, | |
159 | struct argpar_item * const item) | |
160 | { | |
161 | bool success; | |
162 | ||
163 | ARGPAR_ASSERT(array); | |
164 | ARGPAR_ASSERT(item); | |
165 | ||
166 | if (array->n_items == array->n_alloc) { | |
167 | unsigned int new_n_alloc = array->n_alloc * 2; | |
168 | struct argpar_item **new_items; | |
169 | ||
170 | new_items = argpar_realloc(array->items, | |
171 | struct argpar_item *, new_n_alloc); | |
172 | if (!new_items) { | |
173 | success = false; | |
174 | goto end; | |
175 | } | |
176 | ||
177 | array->n_alloc = new_n_alloc; | |
178 | array->items = new_items; | |
179 | } | |
180 | ||
181 | array->items[array->n_items] = item; | |
182 | array->n_items++; | |
183 | ||
184 | success = true; | |
185 | ||
186 | end: | |
187 | return success; | |
188 | } | |
189 | ||
190 | static | |
191 | void destroy_item_array(struct argpar_item_array * const array) | |
192 | { | |
193 | if (array) { | |
194 | unsigned int i; | |
195 | ||
196 | for (i = 0; i < array->n_items; i++) { | |
4624dad0 | 197 | argpar_item_destroy(array->items[i]); |
e2fb96d8 SM |
198 | } |
199 | ||
200 | free(array->items); | |
201 | free(array); | |
202 | } | |
203 | } | |
204 | ||
205 | static | |
206 | struct argpar_item_array *new_item_array(void) | |
207 | { | |
208 | struct argpar_item_array *ret; | |
209 | const int initial_size = 10; | |
210 | ||
211 | ret = argpar_zalloc(struct argpar_item_array); | |
212 | if (!ret) { | |
213 | goto end; | |
214 | } | |
215 | ||
216 | ret->items = argpar_calloc(struct argpar_item *, initial_size); | |
217 | if (!ret->items) { | |
218 | goto error; | |
219 | } | |
220 | ||
221 | ret->n_alloc = initial_size; | |
222 | ||
223 | goto end; | |
224 | ||
225 | error: | |
226 | destroy_item_array(ret); | |
227 | ret = NULL; | |
228 | ||
229 | end: | |
230 | return ret; | |
231 | } | |
232 | ||
233 | static | |
234 | struct argpar_item_opt *create_opt_item( | |
235 | const struct argpar_opt_descr * const descr, | |
236 | const char * const arg) | |
237 | { | |
238 | struct argpar_item_opt *opt_item = | |
239 | argpar_zalloc(struct argpar_item_opt); | |
240 | ||
241 | if (!opt_item) { | |
242 | goto end; | |
243 | } | |
244 | ||
245 | opt_item->base.type = ARGPAR_ITEM_TYPE_OPT; | |
246 | opt_item->descr = descr; | |
247 | ||
248 | if (arg) { | |
249 | opt_item->arg = strdup(arg); | |
250 | if (!opt_item->arg) { | |
251 | goto error; | |
252 | } | |
253 | } | |
254 | ||
255 | goto end; | |
256 | ||
257 | error: | |
4624dad0 | 258 | argpar_item_destroy(&opt_item->base); |
e2fb96d8 SM |
259 | opt_item = NULL; |
260 | ||
261 | end: | |
262 | return opt_item; | |
263 | } | |
264 | ||
265 | static | |
266 | struct argpar_item_non_opt *create_non_opt_item(const char * const arg, | |
267 | const unsigned int orig_index, | |
268 | const unsigned int non_opt_index) | |
269 | { | |
270 | struct argpar_item_non_opt * const non_opt_item = | |
271 | argpar_zalloc(struct argpar_item_non_opt); | |
272 | ||
273 | if (!non_opt_item) { | |
274 | goto end; | |
275 | } | |
276 | ||
277 | non_opt_item->base.type = ARGPAR_ITEM_TYPE_NON_OPT; | |
278 | non_opt_item->arg = arg; | |
279 | non_opt_item->orig_index = orig_index; | |
280 | non_opt_item->non_opt_index = non_opt_index; | |
281 | ||
282 | end: | |
283 | return non_opt_item; | |
284 | } | |
285 | ||
286 | static | |
287 | const struct argpar_opt_descr *find_descr( | |
288 | const struct argpar_opt_descr * const descrs, | |
289 | const char short_name, const char * const long_name) | |
290 | { | |
291 | const struct argpar_opt_descr *descr; | |
292 | ||
293 | for (descr = descrs; descr->short_name || descr->long_name; descr++) { | |
294 | if (short_name && descr->short_name && | |
295 | short_name == descr->short_name) { | |
296 | goto end; | |
297 | } | |
298 | ||
299 | if (long_name && descr->long_name && | |
300 | strcmp(long_name, descr->long_name) == 0) { | |
301 | goto end; | |
302 | } | |
303 | } | |
304 | ||
305 | end: | |
306 | return !descr->short_name && !descr->long_name ? NULL : descr; | |
307 | } | |
308 | ||
309 | enum parse_orig_arg_opt_ret { | |
310 | PARSE_ORIG_ARG_OPT_RET_OK, | |
311 | PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT = -2, | |
312 | PARSE_ORIG_ARG_OPT_RET_ERROR = -1, | |
313 | }; | |
314 | ||
315 | static | |
316 | enum parse_orig_arg_opt_ret parse_short_opts(const char * const short_opts, | |
317 | const char * const next_orig_arg, | |
318 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
319 | struct argpar_state *state, |
320 | char **error, | |
321 | struct argpar_item **item) | |
e2fb96d8 SM |
322 | { |
323 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
4624dad0 | 324 | bool used_next_orig_arg = false; |
e2fb96d8 SM |
325 | |
326 | if (strlen(short_opts) == 0) { | |
4624dad0 | 327 | argpar_string_append_printf(error, "Invalid argument"); |
e2fb96d8 SM |
328 | goto error; |
329 | } | |
330 | ||
4624dad0 SM |
331 | if (!state->short_opt_ch) { |
332 | state->short_opt_ch = short_opts; | |
333 | } | |
e2fb96d8 | 334 | |
4624dad0 SM |
335 | const char *opt_arg = NULL; |
336 | const struct argpar_opt_descr *descr; | |
337 | struct argpar_item_opt *opt_item; | |
e2fb96d8 | 338 | |
4624dad0 SM |
339 | /* Find corresponding option descriptor */ |
340 | descr = find_descr(descrs, *state->short_opt_ch, NULL); | |
341 | if (!descr) { | |
342 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
343 | argpar_string_append_printf(error, | |
344 | "Unknown option `-%c`", *state->short_opt_ch); | |
345 | goto error; | |
346 | } | |
e2fb96d8 | 347 | |
4624dad0 SM |
348 | if (descr->with_arg) { |
349 | if (state->short_opt_ch[1]) { | |
350 | /* `-oarg` form */ | |
351 | opt_arg = &state->short_opt_ch[1]; | |
352 | } else { | |
353 | /* `-o arg` form */ | |
354 | opt_arg = next_orig_arg; | |
355 | used_next_orig_arg = true; | |
e2fb96d8 SM |
356 | } |
357 | ||
4624dad0 SM |
358 | /* |
359 | * We accept `-o ''` (empty option's argument), | |
360 | * but not `-o` alone if an option's argument is | |
361 | * expected. | |
362 | */ | |
363 | if (!opt_arg || (state->short_opt_ch[1] && strlen(opt_arg) == 0)) { | |
364 | argpar_string_append_printf(error, | |
365 | "Missing required argument for option `-%c`", | |
366 | *state->short_opt_ch); | |
367 | used_next_orig_arg = false; | |
e2fb96d8 SM |
368 | goto error; |
369 | } | |
4624dad0 | 370 | } |
e2fb96d8 | 371 | |
4624dad0 SM |
372 | /* Create and append option argument */ |
373 | opt_item = create_opt_item(descr, opt_arg); | |
374 | if (!opt_item) { | |
375 | goto error; | |
376 | } | |
e2fb96d8 | 377 | |
4624dad0 | 378 | *item = &opt_item->base; |
e2fb96d8 | 379 | |
4624dad0 SM |
380 | state->short_opt_ch++; |
381 | ||
382 | if (descr->with_arg || !*state->short_opt_ch) { | |
383 | /* Option has an argument: no more options */ | |
384 | state->short_opt_ch = NULL; | |
385 | ||
386 | if (used_next_orig_arg) { | |
387 | state->i += 2; | |
388 | } else { | |
389 | state->i += 1; | |
390 | } | |
e2fb96d8 SM |
391 | } |
392 | ||
393 | goto end; | |
394 | ||
395 | error: | |
396 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
397 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
398 | } | |
399 | ||
400 | end: | |
401 | return ret; | |
402 | } | |
403 | ||
404 | static | |
405 | enum parse_orig_arg_opt_ret parse_long_opt(const char * const long_opt_arg, | |
406 | const char * const next_orig_arg, | |
407 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
408 | struct argpar_state *state, |
409 | char **error, | |
410 | struct argpar_item **item) | |
e2fb96d8 SM |
411 | { |
412 | const size_t max_len = 127; | |
413 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
414 | const struct argpar_opt_descr *descr; | |
415 | struct argpar_item_opt *opt_item; | |
4624dad0 | 416 | bool used_next_orig_arg = false; |
e2fb96d8 SM |
417 | |
418 | /* Option's argument, if any */ | |
419 | const char *opt_arg = NULL; | |
420 | ||
421 | /* Position of first `=`, if any */ | |
422 | const char *eq_pos; | |
423 | ||
424 | /* Buffer holding option name when `long_opt_arg` contains `=` */ | |
425 | char buf[max_len + 1]; | |
426 | ||
427 | /* Option name */ | |
428 | const char *long_opt_name = long_opt_arg; | |
429 | ||
430 | if (strlen(long_opt_arg) == 0) { | |
4624dad0 | 431 | argpar_string_append_printf(error, |
e2fb96d8 SM |
432 | "Invalid argument"); |
433 | goto error; | |
434 | } | |
435 | ||
436 | /* Find the first `=` in original argument */ | |
437 | eq_pos = strchr(long_opt_arg, '='); | |
438 | if (eq_pos) { | |
439 | const size_t long_opt_name_size = eq_pos - long_opt_arg; | |
440 | ||
441 | /* Isolate the option name */ | |
442 | if (long_opt_name_size > max_len) { | |
4624dad0 | 443 | argpar_string_append_printf(error, |
e2fb96d8 SM |
444 | "Invalid argument `--%s`", long_opt_arg); |
445 | goto error; | |
446 | } | |
447 | ||
448 | memcpy(buf, long_opt_arg, long_opt_name_size); | |
449 | buf[long_opt_name_size] = '\0'; | |
450 | long_opt_name = buf; | |
451 | } | |
452 | ||
453 | /* Find corresponding option descriptor */ | |
454 | descr = find_descr(descrs, '\0', long_opt_name); | |
455 | if (!descr) { | |
4624dad0 | 456 | argpar_string_append_printf(error, |
e2fb96d8 SM |
457 | "Unknown option `--%s`", long_opt_name); |
458 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
459 | goto error; | |
460 | } | |
461 | ||
462 | /* Find option's argument if any */ | |
463 | if (descr->with_arg) { | |
464 | if (eq_pos) { | |
465 | /* `--long-opt=arg` style */ | |
466 | opt_arg = eq_pos + 1; | |
467 | } else { | |
468 | /* `--long-opt arg` style */ | |
469 | if (!next_orig_arg) { | |
4624dad0 | 470 | argpar_string_append_printf(error, |
e2fb96d8 SM |
471 | "Missing required argument for option `--%s`", |
472 | long_opt_name); | |
473 | goto error; | |
474 | } | |
475 | ||
476 | opt_arg = next_orig_arg; | |
4624dad0 | 477 | used_next_orig_arg = true; |
e2fb96d8 | 478 | } |
ebdbbd32 SM |
479 | } else if (eq_pos) { |
480 | /* | |
481 | * Unexpected `--opt=arg` style for a long option which | |
482 | * doesn't accept an argument. | |
483 | */ | |
484 | argpar_string_append_printf(error, | |
485 | "Unexpected argument for option `--%s`", | |
486 | long_opt_name); | |
487 | goto error; | |
e2fb96d8 SM |
488 | } |
489 | ||
490 | /* Create and append option argument */ | |
491 | opt_item = create_opt_item(descr, opt_arg); | |
492 | if (!opt_item) { | |
493 | goto error; | |
494 | } | |
495 | ||
4624dad0 SM |
496 | if (used_next_orig_arg) { |
497 | state->i += 2; | |
498 | } else { | |
499 | state->i += 1; | |
e2fb96d8 SM |
500 | } |
501 | ||
4624dad0 | 502 | *item = &opt_item->base; |
e2fb96d8 SM |
503 | goto end; |
504 | ||
505 | error: | |
506 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
507 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
508 | } | |
509 | ||
510 | end: | |
511 | return ret; | |
512 | } | |
513 | ||
514 | static | |
515 | enum parse_orig_arg_opt_ret parse_orig_arg_opt(const char * const orig_arg, | |
516 | const char * const next_orig_arg, | |
517 | const struct argpar_opt_descr * const descrs, | |
4624dad0 SM |
518 | struct argpar_state *state, |
519 | char **error, | |
520 | struct argpar_item **item) | |
e2fb96d8 SM |
521 | { |
522 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
523 | ||
524 | ARGPAR_ASSERT(orig_arg[0] == '-'); | |
525 | ||
526 | if (orig_arg[1] == '-') { | |
527 | /* Long option */ | |
528 | ret = parse_long_opt(&orig_arg[2], | |
4624dad0 | 529 | next_orig_arg, descrs, state, error, item); |
e2fb96d8 SM |
530 | } else { |
531 | /* Short option */ | |
532 | ret = parse_short_opts(&orig_arg[1], | |
4624dad0 | 533 | next_orig_arg, descrs, state, error, item); |
e2fb96d8 SM |
534 | } |
535 | ||
536 | return ret; | |
537 | } | |
538 | ||
539 | static | |
540 | bool prepend_while_parsing_arg_to_error(char **error, | |
541 | const unsigned int i, const char * const arg) | |
542 | { | |
543 | char *new_error; | |
544 | bool success; | |
545 | ||
546 | ARGPAR_ASSERT(error); | |
547 | ARGPAR_ASSERT(*error); | |
548 | ||
549 | new_error = argpar_asprintf("While parsing argument #%u (`%s`): %s", | |
550 | i + 1, arg, *error); | |
551 | if (!new_error) { | |
552 | success = false; | |
553 | goto end; | |
554 | } | |
555 | ||
556 | free(*error); | |
557 | *error = new_error; | |
558 | success = true; | |
559 | ||
560 | end: | |
561 | return success; | |
562 | } | |
563 | ||
4624dad0 SM |
564 | ARGPAR_HIDDEN |
565 | struct argpar_state *argpar_state_create( | |
566 | unsigned int argc, | |
567 | const char * const *argv, | |
568 | const struct argpar_opt_descr * const descrs) | |
569 | { | |
570 | struct argpar_state *state; | |
571 | ||
572 | state = argpar_zalloc(struct argpar_state); | |
573 | if (!state) { | |
574 | goto end; | |
575 | } | |
576 | ||
577 | state->argc = argc; | |
578 | state->argv = argv; | |
579 | state->descrs = descrs; | |
580 | ||
581 | end: | |
582 | return state; | |
583 | } | |
584 | ||
585 | ARGPAR_HIDDEN | |
586 | void argpar_state_destroy(struct argpar_state *state) | |
587 | { | |
588 | free(state); | |
589 | } | |
590 | ||
591 | ARGPAR_HIDDEN | |
592 | enum argpar_state_parse_next_status argpar_state_parse_next( | |
593 | struct argpar_state *state, | |
594 | struct argpar_item **item, | |
595 | char **error) | |
596 | { | |
597 | enum argpar_state_parse_next_status status; | |
598 | ||
599 | ARGPAR_ASSERT(state->i <= state->argc); | |
600 | ||
601 | *error = NULL; | |
602 | ||
603 | if (state->i == state->argc) { | |
604 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_END; | |
605 | goto end; | |
606 | } | |
607 | ||
608 | enum parse_orig_arg_opt_ret parse_orig_arg_opt_ret; | |
609 | const char * const orig_arg = state->argv[state->i]; | |
610 | const char * const next_orig_arg = | |
611 | state->i < (state->argc - 1) ? state->argv[state->i + 1] : NULL; | |
612 | ||
613 | if (orig_arg[0] != '-') { | |
614 | /* Non-option argument */ | |
615 | struct argpar_item_non_opt *non_opt_item = | |
616 | create_non_opt_item(orig_arg, state->i, state->non_opt_index); | |
617 | ||
618 | if (!non_opt_item) { | |
619 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
620 | goto end; | |
621 | } | |
622 | ||
623 | state->non_opt_index++; | |
624 | state->i++; | |
625 | ||
626 | *item = &non_opt_item->base; | |
627 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
628 | goto end; | |
629 | } | |
630 | ||
631 | /* Option argument */ | |
632 | parse_orig_arg_opt_ret = parse_orig_arg_opt(orig_arg, | |
633 | next_orig_arg, state->descrs, state, error, item); | |
634 | switch (parse_orig_arg_opt_ret) { | |
635 | case PARSE_ORIG_ARG_OPT_RET_OK: | |
636 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; | |
637 | break; | |
638 | case PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT: | |
639 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT; | |
640 | break;; | |
641 | case PARSE_ORIG_ARG_OPT_RET_ERROR: | |
642 | prepend_while_parsing_arg_to_error( | |
643 | error, state->i, orig_arg); | |
644 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
645 | break; | |
646 | default: | |
647 | abort(); | |
648 | } | |
649 | ||
650 | end: | |
651 | return status; | |
652 | } | |
653 | ||
654 | ARGPAR_HIDDEN | |
655 | int argpar_state_get_ingested_orig_args(struct argpar_state *state) | |
656 | { | |
657 | return state->i; | |
658 | } | |
659 | ||
e2fb96d8 SM |
660 | ARGPAR_HIDDEN |
661 | struct argpar_parse_ret argpar_parse(unsigned int argc, | |
662 | const char * const *argv, | |
663 | const struct argpar_opt_descr * const descrs, | |
664 | bool fail_on_unknown_opt) | |
665 | { | |
666 | struct argpar_parse_ret parse_ret = { 0 }; | |
4624dad0 SM |
667 | struct argpar_item *item = NULL; |
668 | struct argpar_state *state = NULL; | |
e2fb96d8 SM |
669 | |
670 | parse_ret.items = new_item_array(); | |
671 | if (!parse_ret.items) { | |
4624dad0 SM |
672 | parse_ret.error = strdup("Failed to create items array."); |
673 | ARGPAR_ASSERT(parse_ret.error); | |
e2fb96d8 SM |
674 | goto error; |
675 | } | |
676 | ||
4624dad0 SM |
677 | state = argpar_state_create(argc, argv, descrs); |
678 | if (!state) { | |
679 | parse_ret.error = strdup("Failed to create argpar state."); | |
680 | ARGPAR_ASSERT(parse_ret.error); | |
681 | goto error; | |
682 | } | |
e2fb96d8 | 683 | |
4624dad0 SM |
684 | while (true) { |
685 | enum argpar_state_parse_next_status status; | |
e2fb96d8 | 686 | |
4624dad0 SM |
687 | status = argpar_state_parse_next(state, &item, &parse_ret.error); |
688 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
689 | goto error; | |
690 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
e2fb96d8 | 691 | break; |
4624dad0 | 692 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
e2fb96d8 | 693 | if (fail_on_unknown_opt) { |
4624dad0 SM |
694 | parse_ret.ingested_orig_args = |
695 | argpar_state_get_ingested_orig_args(state); | |
e2fb96d8 | 696 | prepend_while_parsing_arg_to_error( |
4624dad0 SM |
697 | &parse_ret.error, parse_ret.ingested_orig_args, |
698 | argv[parse_ret.ingested_orig_args]); | |
699 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; | |
e2fb96d8 SM |
700 | goto error; |
701 | } | |
702 | ||
e2fb96d8 SM |
703 | free(parse_ret.error); |
704 | parse_ret.error = NULL; | |
4624dad0 | 705 | break; |
e2fb96d8 SM |
706 | } |
707 | ||
4624dad0 SM |
708 | ARGPAR_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
709 | ||
710 | if (!push_item(parse_ret.items, item)) { | |
711 | goto error; | |
e2fb96d8 | 712 | } |
4624dad0 | 713 | item = NULL; |
e2fb96d8 SM |
714 | } |
715 | ||
4624dad0 SM |
716 | ARGPAR_ASSERT(!parse_ret.error); |
717 | parse_ret.ingested_orig_args = | |
718 | argpar_state_get_ingested_orig_args(state); | |
e2fb96d8 SM |
719 | goto end; |
720 | ||
721 | error: | |
4624dad0 SM |
722 | ARGPAR_ASSERT(parse_ret.error); |
723 | ||
e2fb96d8 SM |
724 | /* That's how we indicate that an error occurred */ |
725 | destroy_item_array(parse_ret.items); | |
726 | parse_ret.items = NULL; | |
727 | ||
728 | end: | |
4624dad0 SM |
729 | argpar_state_destroy(state); |
730 | argpar_item_destroy(item); | |
e2fb96d8 SM |
731 | return parse_ret; |
732 | } | |
733 | ||
734 | ARGPAR_HIDDEN | |
735 | void argpar_parse_ret_fini(struct argpar_parse_ret *ret) | |
736 | { | |
737 | ARGPAR_ASSERT(ret); | |
738 | ||
739 | destroy_item_array(ret->items); | |
740 | ret->items = NULL; | |
741 | ||
742 | free(ret->error); | |
743 | ret->error = NULL; | |
744 | } |