Commit | Line | Data |
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903a5b8a | 1 | /* |
03e1579f | 2 | * SPDX-License-Identifier: MIT |
903a5b8a | 3 | * |
fc07e526 SM |
4 | * Copyright (c) 2019-2021 Philippe Proulx <pproulx@efficios.com> |
5 | * Copyright (c) 2020-2021 Simon Marchi <simon.marchi@efficios.com> | |
903a5b8a SM |
6 | */ |
7 | ||
7ac57709 SM |
8 | #include <assert.h> |
9 | #include <stdarg.h> | |
903a5b8a | 10 | #include <stdbool.h> |
7ac57709 | 11 | #include <stdio.h> |
903a5b8a SM |
12 | #include <stdlib.h> |
13 | #include <string.h> | |
903a5b8a SM |
14 | |
15 | #include "argpar.h" | |
16 | ||
fb12ac67 PP |
17 | #define ARGPAR_REALLOC(_ptr, _type, _nmemb) \ |
18 | ((_type *) realloc(_ptr, (_nmemb) * sizeof(_type))) | |
19 | ||
20 | #define ARGPAR_CALLOC(_type, _nmemb) \ | |
21 | ((_type *) calloc((_nmemb), sizeof(_type))) | |
22 | ||
23 | #define ARGPAR_ZALLOC(_type) ARGPAR_CALLOC(_type, 1) | |
7ac57709 SM |
24 | |
25 | #define ARGPAR_ASSERT(_cond) assert(_cond) | |
26 | ||
1ae22b5e SM |
27 | #ifdef __MINGW_PRINTF_FORMAT |
28 | # define ARGPAR_PRINTF_FORMAT __MINGW_PRINTF_FORMAT | |
29 | #else | |
30 | # define ARGPAR_PRINTF_FORMAT printf | |
31 | #endif | |
32 | ||
fc07e526 SM |
33 | /* |
34 | * An argpar iterator. | |
35 | * | |
36 | * Such a structure contains the state of an iterator between | |
37 | * calls to argpar_iter_parse_next(). | |
38 | */ | |
39 | struct argpar_iter { | |
40 | /* | |
41 | * Data provided by the user to argpar_iter_create(); immutable | |
42 | * afterwards. | |
43 | */ | |
44 | unsigned int argc; | |
45 | const char * const *argv; | |
46 | const struct argpar_opt_descr *descrs; | |
47 | ||
48 | /* | |
49 | * Index of the argument to process in the next | |
50 | * argpar_iter_parse_next() call. | |
51 | */ | |
52 | unsigned int i; | |
53 | ||
54 | /* Counter of non-option arguments */ | |
55 | int non_opt_index; | |
56 | ||
57 | /* | |
58 | * Current character of the current short option group: if it's | |
59 | * not `NULL`, the parser is in within a short option group, | |
60 | * therefore it must resume there in the next | |
61 | * argpar_iter_parse_next() call. | |
62 | */ | |
63 | const char *short_opt_ch; | |
64 | }; | |
65 | ||
1ae22b5e | 66 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 0))) |
fb12ac67 | 67 | char *argpar_vasprintf(const char * const fmt, va_list args) |
7ac57709 SM |
68 | { |
69 | int len1, len2; | |
70 | char *str; | |
71 | va_list args2; | |
72 | ||
73 | va_copy(args2, args); | |
7ac57709 SM |
74 | len1 = vsnprintf(NULL, 0, fmt, args); |
75 | if (len1 < 0) { | |
76 | str = NULL; | |
77 | goto end; | |
78 | } | |
79 | ||
80 | str = malloc(len1 + 1); | |
81 | if (!str) { | |
82 | goto end; | |
83 | } | |
84 | ||
85 | len2 = vsnprintf(str, len1 + 1, fmt, args2); | |
7ac57709 SM |
86 | ARGPAR_ASSERT(len1 == len2); |
87 | ||
88 | end: | |
92ecd98e | 89 | va_end(args2); |
7ac57709 SM |
90 | return str; |
91 | } | |
92 | ||
93 | ||
1ae22b5e | 94 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 1, 2))) |
fb12ac67 | 95 | char *argpar_asprintf(const char * const fmt, ...) |
7ac57709 SM |
96 | { |
97 | va_list args; | |
98 | char *str; | |
f46b5106 | 99 | |
7ac57709 SM |
100 | va_start(args, fmt); |
101 | str = argpar_vasprintf(fmt, args); | |
102 | va_end(args); | |
7ac57709 SM |
103 | return str; |
104 | } | |
105 | ||
1ae22b5e | 106 | static __attribute__((format(ARGPAR_PRINTF_FORMAT, 2, 3))) |
fb12ac67 | 107 | bool append_string_printf(char ** const str, const char *fmt, ...) |
7ac57709 SM |
108 | { |
109 | char *new_str = NULL; | |
110 | char *addendum; | |
111 | bool success; | |
112 | va_list args; | |
113 | ||
114 | ARGPAR_ASSERT(str); | |
7ac57709 SM |
115 | va_start(args, fmt); |
116 | addendum = argpar_vasprintf(fmt, args); | |
117 | va_end(args); | |
118 | ||
119 | if (!addendum) { | |
120 | success = false; | |
121 | goto end; | |
122 | } | |
123 | ||
124 | new_str = argpar_asprintf("%s%s", *str ? *str : "", addendum); | |
125 | if (!new_str) { | |
126 | success = false; | |
127 | goto end; | |
128 | } | |
f46b5106 | 129 | |
7ac57709 SM |
130 | free(*str); |
131 | *str = new_str; | |
7ac57709 SM |
132 | success = true; |
133 | ||
134 | end: | |
135 | free(addendum); | |
7ac57709 SM |
136 | return success; |
137 | } | |
138 | ||
fc07e526 SM |
139 | ARGPAR_HIDDEN |
140 | void argpar_item_destroy(const struct argpar_item * const item) | |
903a5b8a SM |
141 | { |
142 | if (!item) { | |
143 | goto end; | |
144 | } | |
145 | ||
1c9a6bde | 146 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
fc07e526 SM |
147 | struct argpar_item_opt * const opt_item = |
148 | (struct argpar_item_opt *) item; | |
903a5b8a | 149 | |
7ac57709 | 150 | free((void *) opt_item->arg); |
903a5b8a SM |
151 | } |
152 | ||
fc07e526 | 153 | free((void *) item); |
903a5b8a SM |
154 | |
155 | end: | |
156 | return; | |
157 | } | |
158 | ||
7ac57709 | 159 | static |
1c9a6bde | 160 | bool push_item(struct argpar_item_array * const array, |
fb12ac67 | 161 | const struct argpar_item * const item) |
7ac57709 SM |
162 | { |
163 | bool success; | |
164 | ||
165 | ARGPAR_ASSERT(array); | |
166 | ARGPAR_ASSERT(item); | |
167 | ||
168 | if (array->n_items == array->n_alloc) { | |
fb12ac67 PP |
169 | const unsigned int new_n_alloc = array->n_alloc * 2; |
170 | const struct argpar_item ** const new_items = | |
171 | ARGPAR_REALLOC(array->items, const struct argpar_item *, | |
172 | new_n_alloc); | |
7ac57709 SM |
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++; | |
7ac57709 SM |
184 | success = true; |
185 | ||
186 | end: | |
187 | return success; | |
188 | } | |
189 | ||
190 | static | |
1c9a6bde | 191 | void destroy_item_array(struct argpar_item_array * const array) |
7ac57709 SM |
192 | { |
193 | if (array) { | |
194 | unsigned int i; | |
195 | ||
196 | for (i = 0; i < array->n_items; i++) { | |
fc07e526 | 197 | argpar_item_destroy(array->items[i]); |
7ac57709 SM |
198 | } |
199 | ||
200 | free(array->items); | |
201 | free(array); | |
202 | } | |
203 | } | |
204 | ||
205 | static | |
fb12ac67 | 206 | struct argpar_item_array *create_item_array(void) |
7ac57709 | 207 | { |
1c9a6bde | 208 | struct argpar_item_array *ret; |
7ac57709 SM |
209 | const int initial_size = 10; |
210 | ||
fb12ac67 | 211 | ret = ARGPAR_ZALLOC(struct argpar_item_array); |
7ac57709 SM |
212 | if (!ret) { |
213 | goto end; | |
214 | } | |
215 | ||
fb12ac67 | 216 | ret->items = ARGPAR_CALLOC(const struct argpar_item *, initial_size); |
7ac57709 SM |
217 | if (!ret->items) { |
218 | goto error; | |
219 | } | |
220 | ||
221 | ret->n_alloc = initial_size; | |
7ac57709 SM |
222 | goto end; |
223 | ||
224 | error: | |
225 | destroy_item_array(ret); | |
226 | ret = NULL; | |
227 | ||
228 | end: | |
229 | return ret; | |
230 | } | |
231 | ||
903a5b8a | 232 | static |
1c9a6bde SM |
233 | struct argpar_item_opt *create_opt_item( |
234 | const struct argpar_opt_descr * const descr, | |
903a5b8a SM |
235 | const char * const arg) |
236 | { | |
1c9a6bde | 237 | struct argpar_item_opt *opt_item = |
fb12ac67 | 238 | ARGPAR_ZALLOC(struct argpar_item_opt); |
903a5b8a SM |
239 | |
240 | if (!opt_item) { | |
241 | goto end; | |
242 | } | |
243 | ||
1c9a6bde | 244 | opt_item->base.type = ARGPAR_ITEM_TYPE_OPT; |
903a5b8a SM |
245 | opt_item->descr = descr; |
246 | ||
247 | if (arg) { | |
7ac57709 | 248 | opt_item->arg = strdup(arg); |
903a5b8a SM |
249 | if (!opt_item->arg) { |
250 | goto error; | |
251 | } | |
252 | } | |
253 | ||
254 | goto end; | |
255 | ||
256 | error: | |
fc07e526 | 257 | argpar_item_destroy(&opt_item->base); |
903a5b8a SM |
258 | opt_item = NULL; |
259 | ||
260 | end: | |
261 | return opt_item; | |
262 | } | |
263 | ||
264 | static | |
1c9a6bde | 265 | struct argpar_item_non_opt *create_non_opt_item(const char * const arg, |
903a5b8a SM |
266 | const unsigned int orig_index, |
267 | const unsigned int non_opt_index) | |
268 | { | |
1c9a6bde | 269 | struct argpar_item_non_opt * const non_opt_item = |
fb12ac67 | 270 | ARGPAR_ZALLOC(struct argpar_item_non_opt); |
903a5b8a SM |
271 | |
272 | if (!non_opt_item) { | |
273 | goto end; | |
274 | } | |
275 | ||
1c9a6bde | 276 | non_opt_item->base.type = ARGPAR_ITEM_TYPE_NON_OPT; |
903a5b8a SM |
277 | non_opt_item->arg = arg; |
278 | non_opt_item->orig_index = orig_index; | |
279 | non_opt_item->non_opt_index = non_opt_index; | |
280 | ||
281 | end: | |
282 | return non_opt_item; | |
283 | } | |
284 | ||
285 | static | |
1c9a6bde SM |
286 | const struct argpar_opt_descr *find_descr( |
287 | const struct argpar_opt_descr * const descrs, | |
903a5b8a SM |
288 | const char short_name, const char * const long_name) |
289 | { | |
1c9a6bde | 290 | const struct argpar_opt_descr *descr; |
903a5b8a SM |
291 | |
292 | for (descr = descrs; descr->short_name || descr->long_name; descr++) { | |
293 | if (short_name && descr->short_name && | |
294 | short_name == descr->short_name) { | |
295 | goto end; | |
296 | } | |
297 | ||
298 | if (long_name && descr->long_name && | |
299 | strcmp(long_name, descr->long_name) == 0) { | |
300 | goto end; | |
301 | } | |
302 | } | |
303 | ||
304 | end: | |
305 | return !descr->short_name && !descr->long_name ? NULL : descr; | |
306 | } | |
307 | ||
308 | enum parse_orig_arg_opt_ret { | |
309 | PARSE_ORIG_ARG_OPT_RET_OK, | |
310 | PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT = -2, | |
311 | PARSE_ORIG_ARG_OPT_RET_ERROR = -1, | |
312 | }; | |
313 | ||
314 | static | |
315 | enum parse_orig_arg_opt_ret parse_short_opts(const char * const short_opts, | |
316 | const char * const next_orig_arg, | |
1c9a6bde | 317 | const struct argpar_opt_descr * const descrs, |
fc07e526 SM |
318 | struct argpar_iter * const iter, |
319 | char ** const error, struct argpar_item ** const item) | |
903a5b8a SM |
320 | { |
321 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
fc07e526 SM |
322 | bool used_next_orig_arg = false; |
323 | const char *opt_arg = NULL; | |
324 | const struct argpar_opt_descr *descr; | |
325 | struct argpar_item_opt *opt_item; | |
903a5b8a SM |
326 | |
327 | if (strlen(short_opts) == 0) { | |
fb12ac67 | 328 | append_string_printf(error, "Invalid argument"); |
903a5b8a SM |
329 | goto error; |
330 | } | |
331 | ||
fc07e526 SM |
332 | if (!iter->short_opt_ch) { |
333 | iter->short_opt_ch = short_opts; | |
334 | } | |
903a5b8a | 335 | |
fc07e526 SM |
336 | /* Find corresponding option descriptor */ |
337 | descr = find_descr(descrs, *iter->short_opt_ch, NULL); | |
338 | if (!descr) { | |
339 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; | |
fb12ac67 PP |
340 | append_string_printf(error, "Unknown option `-%c`", |
341 | *iter->short_opt_ch); | |
fc07e526 SM |
342 | goto error; |
343 | } | |
903a5b8a | 344 | |
fc07e526 SM |
345 | if (descr->with_arg) { |
346 | if (iter->short_opt_ch[1]) { | |
347 | /* `-oarg` form */ | |
348 | opt_arg = &iter->short_opt_ch[1]; | |
349 | } else { | |
350 | /* `-o arg` form */ | |
351 | opt_arg = next_orig_arg; | |
352 | used_next_orig_arg = true; | |
903a5b8a SM |
353 | } |
354 | ||
fc07e526 SM |
355 | /* |
356 | * We accept `-o ''` (empty option argument), but not | |
357 | * `-o` alone if an option argument is expected. | |
358 | */ | |
fb12ac67 PP |
359 | if (!opt_arg || (iter->short_opt_ch[1] && |
360 | strlen(opt_arg) == 0)) { | |
361 | append_string_printf(error, | |
fc07e526 SM |
362 | "Missing required argument for option `-%c`", |
363 | *iter->short_opt_ch); | |
364 | used_next_orig_arg = false; | |
903a5b8a SM |
365 | goto error; |
366 | } | |
fc07e526 | 367 | } |
903a5b8a | 368 | |
fc07e526 SM |
369 | /* Create and append option argument */ |
370 | opt_item = create_opt_item(descr, opt_arg); | |
371 | if (!opt_item) { | |
372 | goto error; | |
373 | } | |
903a5b8a | 374 | |
fc07e526 SM |
375 | *item = &opt_item->base; |
376 | iter->short_opt_ch++; | |
903a5b8a | 377 | |
fc07e526 SM |
378 | if (descr->with_arg || !*iter->short_opt_ch) { |
379 | /* Option has an argument: no more options */ | |
380 | iter->short_opt_ch = NULL; | |
381 | ||
382 | if (used_next_orig_arg) { | |
383 | iter->i += 2; | |
384 | } else { | |
385 | iter->i++; | |
386 | } | |
903a5b8a SM |
387 | } |
388 | ||
389 | goto end; | |
390 | ||
391 | error: | |
392 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
393 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
394 | } | |
395 | ||
396 | end: | |
397 | return ret; | |
398 | } | |
399 | ||
400 | static | |
401 | enum parse_orig_arg_opt_ret parse_long_opt(const char * const long_opt_arg, | |
402 | const char * const next_orig_arg, | |
1c9a6bde | 403 | const struct argpar_opt_descr * const descrs, |
fc07e526 SM |
404 | struct argpar_iter * const iter, |
405 | char ** const error, struct argpar_item ** const item) | |
903a5b8a SM |
406 | { |
407 | const size_t max_len = 127; | |
408 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
1c9a6bde SM |
409 | const struct argpar_opt_descr *descr; |
410 | struct argpar_item_opt *opt_item; | |
fc07e526 | 411 | bool used_next_orig_arg = false; |
903a5b8a SM |
412 | |
413 | /* Option's argument, if any */ | |
414 | const char *opt_arg = NULL; | |
415 | ||
416 | /* Position of first `=`, if any */ | |
417 | const char *eq_pos; | |
418 | ||
419 | /* Buffer holding option name when `long_opt_arg` contains `=` */ | |
420 | char buf[max_len + 1]; | |
421 | ||
422 | /* Option name */ | |
423 | const char *long_opt_name = long_opt_arg; | |
424 | ||
425 | if (strlen(long_opt_arg) == 0) { | |
fb12ac67 | 426 | append_string_printf(error, "Invalid argument"); |
903a5b8a SM |
427 | goto error; |
428 | } | |
429 | ||
430 | /* Find the first `=` in original argument */ | |
431 | eq_pos = strchr(long_opt_arg, '='); | |
432 | if (eq_pos) { | |
433 | const size_t long_opt_name_size = eq_pos - long_opt_arg; | |
434 | ||
435 | /* Isolate the option name */ | |
436 | if (long_opt_name_size > max_len) { | |
fb12ac67 PP |
437 | append_string_printf(error, "Invalid argument `--%s`", |
438 | long_opt_arg); | |
903a5b8a SM |
439 | goto error; |
440 | } | |
441 | ||
442 | memcpy(buf, long_opt_arg, long_opt_name_size); | |
443 | buf[long_opt_name_size] = '\0'; | |
444 | long_opt_name = buf; | |
445 | } | |
446 | ||
447 | /* Find corresponding option descriptor */ | |
448 | descr = find_descr(descrs, '\0', long_opt_name); | |
449 | if (!descr) { | |
fb12ac67 PP |
450 | append_string_printf(error, "Unknown option `--%s`", |
451 | long_opt_name); | |
903a5b8a SM |
452 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT; |
453 | goto error; | |
454 | } | |
455 | ||
456 | /* Find option's argument if any */ | |
457 | if (descr->with_arg) { | |
458 | if (eq_pos) { | |
459 | /* `--long-opt=arg` style */ | |
460 | opt_arg = eq_pos + 1; | |
461 | } else { | |
462 | /* `--long-opt arg` style */ | |
463 | if (!next_orig_arg) { | |
fb12ac67 | 464 | append_string_printf(error, |
903a5b8a SM |
465 | "Missing required argument for option `--%s`", |
466 | long_opt_name); | |
467 | goto error; | |
468 | } | |
469 | ||
470 | opt_arg = next_orig_arg; | |
fc07e526 | 471 | used_next_orig_arg = true; |
903a5b8a | 472 | } |
430fe886 SM |
473 | } else if (eq_pos) { |
474 | /* | |
475 | * Unexpected `--opt=arg` style for a long option which | |
476 | * doesn't accept an argument. | |
477 | */ | |
fb12ac67 | 478 | append_string_printf(error, |
fc07e526 | 479 | "Unexpected argument for option `--%s`", long_opt_name); |
430fe886 | 480 | goto error; |
903a5b8a SM |
481 | } |
482 | ||
483 | /* Create and append option argument */ | |
484 | opt_item = create_opt_item(descr, opt_arg); | |
485 | if (!opt_item) { | |
486 | goto error; | |
487 | } | |
488 | ||
fc07e526 SM |
489 | if (used_next_orig_arg) { |
490 | iter->i += 2; | |
491 | } else { | |
492 | iter->i++; | |
7ac57709 SM |
493 | } |
494 | ||
fc07e526 | 495 | *item = &opt_item->base; |
903a5b8a SM |
496 | goto end; |
497 | ||
498 | error: | |
499 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { | |
500 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; | |
501 | } | |
502 | ||
503 | end: | |
504 | return ret; | |
505 | } | |
506 | ||
507 | static | |
508 | enum parse_orig_arg_opt_ret parse_orig_arg_opt(const char * const orig_arg, | |
509 | const char * const next_orig_arg, | |
1c9a6bde | 510 | const struct argpar_opt_descr * const descrs, |
fb12ac67 | 511 | struct argpar_iter * const iter, char ** const error, |
fc07e526 | 512 | struct argpar_item ** const item) |
903a5b8a SM |
513 | { |
514 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; | |
515 | ||
7ac57709 | 516 | ARGPAR_ASSERT(orig_arg[0] == '-'); |
903a5b8a SM |
517 | |
518 | if (orig_arg[1] == '-') { | |
519 | /* Long option */ | |
520 | ret = parse_long_opt(&orig_arg[2], | |
fc07e526 | 521 | next_orig_arg, descrs, iter, error, item); |
903a5b8a SM |
522 | } else { |
523 | /* Short option */ | |
524 | ret = parse_short_opts(&orig_arg[1], | |
fc07e526 | 525 | next_orig_arg, descrs, iter, error, item); |
903a5b8a SM |
526 | } |
527 | ||
528 | return ret; | |
529 | } | |
530 | ||
531 | static | |
fb12ac67 | 532 | bool prepend_while_parsing_arg_to_error(char ** const error, |
903a5b8a SM |
533 | const unsigned int i, const char * const arg) |
534 | { | |
7ac57709 SM |
535 | char *new_error; |
536 | bool success; | |
903a5b8a | 537 | |
7ac57709 SM |
538 | ARGPAR_ASSERT(error); |
539 | ARGPAR_ASSERT(*error); | |
7ac57709 SM |
540 | new_error = argpar_asprintf("While parsing argument #%u (`%s`): %s", |
541 | i + 1, arg, *error); | |
542 | if (!new_error) { | |
543 | success = false; | |
903a5b8a SM |
544 | goto end; |
545 | } | |
546 | ||
7ac57709 SM |
547 | free(*error); |
548 | *error = new_error; | |
549 | success = true; | |
903a5b8a SM |
550 | |
551 | end: | |
7ac57709 | 552 | return success; |
903a5b8a SM |
553 | } |
554 | ||
7ac57709 | 555 | ARGPAR_HIDDEN |
fc07e526 SM |
556 | struct argpar_iter *argpar_iter_create(const unsigned int argc, |
557 | const char * const * const argv, | |
558 | const struct argpar_opt_descr * const descrs) | |
903a5b8a | 559 | { |
fb12ac67 | 560 | struct argpar_iter * const iter = ARGPAR_ZALLOC(struct argpar_iter); |
903a5b8a | 561 | |
fc07e526 SM |
562 | if (!iter) { |
563 | goto end; | |
903a5b8a SM |
564 | } |
565 | ||
fc07e526 SM |
566 | iter->argc = argc; |
567 | iter->argv = argv; | |
568 | iter->descrs = descrs; | |
903a5b8a | 569 | |
fc07e526 SM |
570 | end: |
571 | return iter; | |
572 | } | |
903a5b8a | 573 | |
fc07e526 SM |
574 | ARGPAR_HIDDEN |
575 | void argpar_iter_destroy(struct argpar_iter * const iter) | |
576 | { | |
577 | free(iter); | |
578 | } | |
903a5b8a | 579 | |
fc07e526 SM |
580 | ARGPAR_HIDDEN |
581 | enum argpar_iter_parse_next_status argpar_iter_parse_next( | |
582 | struct argpar_iter * const iter, | |
fb12ac67 | 583 | const struct argpar_item ** const item, char ** const error) |
fc07e526 SM |
584 | { |
585 | enum argpar_iter_parse_next_status status; | |
586 | enum parse_orig_arg_opt_ret parse_orig_arg_opt_ret; | |
587 | const char *orig_arg; | |
588 | const char *next_orig_arg; | |
7ac57709 | 589 | |
fc07e526 SM |
590 | ARGPAR_ASSERT(iter->i <= iter->argc); |
591 | *error = NULL; | |
592 | ||
593 | if (iter->i == iter->argc) { | |
594 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_END; | |
595 | goto end; | |
596 | } | |
7ac57709 | 597 | |
fc07e526 SM |
598 | orig_arg = iter->argv[iter->i]; |
599 | next_orig_arg = | |
600 | iter->i < (iter->argc - 1) ? iter->argv[iter->i + 1] : NULL; | |
601 | ||
602 | if (orig_arg[0] != '-') { | |
603 | /* Non-option argument */ | |
604 | struct argpar_item_non_opt * const non_opt_item = | |
605 | create_non_opt_item(orig_arg, iter->i, | |
606 | iter->non_opt_index); | |
607 | ||
608 | if (!non_opt_item) { | |
609 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_ERROR; | |
610 | goto end; | |
903a5b8a SM |
611 | } |
612 | ||
fc07e526 SM |
613 | iter->non_opt_index++; |
614 | iter->i++; | |
615 | *item = &non_opt_item->base; | |
616 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_OK; | |
617 | goto end; | |
618 | } | |
903a5b8a | 619 | |
fc07e526 SM |
620 | /* Option argument */ |
621 | parse_orig_arg_opt_ret = parse_orig_arg_opt(orig_arg, | |
622 | next_orig_arg, iter->descrs, iter, error, | |
623 | (struct argpar_item **) item); | |
624 | switch (parse_orig_arg_opt_ret) { | |
625 | case PARSE_ORIG_ARG_OPT_RET_OK: | |
626 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_OK; | |
627 | break; | |
628 | case PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT: | |
629 | prepend_while_parsing_arg_to_error(error, iter->i, orig_arg); | |
630 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT; | |
631 | break; | |
632 | case PARSE_ORIG_ARG_OPT_RET_ERROR: | |
633 | prepend_while_parsing_arg_to_error(error, iter->i, orig_arg); | |
634 | status = ARGPAR_ITER_PARSE_NEXT_STATUS_ERROR; | |
635 | break; | |
636 | default: | |
637 | abort(); | |
638 | } | |
639 | ||
640 | end: | |
641 | return status; | |
642 | } | |
643 | ||
644 | ARGPAR_HIDDEN | |
645 | unsigned int argpar_iter_get_ingested_orig_args( | |
646 | const struct argpar_iter * const iter) | |
647 | { | |
648 | return iter->i; | |
649 | } | |
650 | ||
651 | ARGPAR_HIDDEN | |
652 | struct argpar_parse_ret argpar_parse(const unsigned int argc, | |
653 | const char * const * const argv, | |
654 | const struct argpar_opt_descr * const descrs, | |
655 | const bool fail_on_unknown_opt) | |
656 | { | |
657 | struct argpar_parse_ret parse_ret = { 0 }; | |
658 | const struct argpar_item *item = NULL; | |
659 | struct argpar_iter *iter = NULL; | |
660 | ||
fb12ac67 | 661 | parse_ret.items = create_item_array(); |
fc07e526 SM |
662 | if (!parse_ret.items) { |
663 | parse_ret.error = strdup("Failed to create items array."); | |
664 | ARGPAR_ASSERT(parse_ret.error); | |
665 | goto error; | |
666 | } | |
667 | ||
668 | iter = argpar_iter_create(argc, argv, descrs); | |
669 | if (!iter) { | |
670 | parse_ret.error = strdup("Failed to create argpar iter."); | |
671 | ARGPAR_ASSERT(parse_ret.error); | |
672 | goto error; | |
673 | } | |
674 | ||
675 | while (true) { | |
fb12ac67 PP |
676 | const enum argpar_iter_parse_next_status status = |
677 | argpar_iter_parse_next(iter, &item, &parse_ret.error); | |
fc07e526 | 678 | |
fc07e526 SM |
679 | if (status == ARGPAR_ITER_PARSE_NEXT_STATUS_ERROR) { |
680 | goto error; | |
681 | } else if (status == ARGPAR_ITER_PARSE_NEXT_STATUS_END) { | |
682 | break; | |
683 | } else if (status == ARGPAR_ITER_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
903a5b8a | 684 | if (fail_on_unknown_opt) { |
fc07e526 SM |
685 | parse_ret.ingested_orig_args = |
686 | argpar_iter_get_ingested_orig_args(iter); | |
903a5b8a SM |
687 | goto error; |
688 | } | |
689 | ||
7ac57709 | 690 | free(parse_ret.error); |
903a5b8a | 691 | parse_ret.error = NULL; |
fc07e526 | 692 | break; |
903a5b8a SM |
693 | } |
694 | ||
fc07e526 SM |
695 | ARGPAR_ASSERT(status == ARGPAR_ITER_PARSE_NEXT_STATUS_OK); |
696 | ||
fb12ac67 | 697 | if (!push_item(parse_ret.items, item)) { |
fc07e526 | 698 | goto error; |
903a5b8a | 699 | } |
fc07e526 SM |
700 | |
701 | item = NULL; | |
903a5b8a SM |
702 | } |
703 | ||
fc07e526 | 704 | ARGPAR_ASSERT(!parse_ret.error); |
fb12ac67 | 705 | parse_ret.ingested_orig_args = argpar_iter_get_ingested_orig_args(iter); |
903a5b8a SM |
706 | goto end; |
707 | ||
708 | error: | |
fc07e526 SM |
709 | ARGPAR_ASSERT(parse_ret.error); |
710 | ||
711 | /* That's how we indicate that an error occurred */ | |
7ac57709 SM |
712 | destroy_item_array(parse_ret.items); |
713 | parse_ret.items = NULL; | |
903a5b8a SM |
714 | |
715 | end: | |
fc07e526 SM |
716 | argpar_iter_destroy(iter); |
717 | argpar_item_destroy(item); | |
903a5b8a SM |
718 | return parse_ret; |
719 | } | |
720 | ||
7ac57709 | 721 | ARGPAR_HIDDEN |
fb12ac67 | 722 | void argpar_parse_ret_fini(struct argpar_parse_ret * const ret) |
903a5b8a | 723 | { |
7ac57709 | 724 | ARGPAR_ASSERT(ret); |
7ac57709 SM |
725 | destroy_item_array(ret->items); |
726 | ret->items = NULL; | |
7ac57709 SM |
727 | free(ret->error); |
728 | ret->error = NULL; | |
903a5b8a | 729 | } |