| 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 | |
| 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 | |
| 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 | |
| 139 | ARGPAR_HIDDEN |
| 140 | void argpar_item_destroy(struct argpar_item *item) |
| 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++) { |
| 198 | argpar_item_destroy(array->items[i]); |
| 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: |
| 259 | argpar_item_destroy(&opt_item->base); |
| 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, |
| 320 | struct argpar_state *state, |
| 321 | char **error, |
| 322 | struct argpar_item **item) |
| 323 | { |
| 324 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; |
| 325 | bool used_next_orig_arg = false; |
| 326 | |
| 327 | if (strlen(short_opts) == 0) { |
| 328 | argpar_string_append_printf(error, "Invalid argument"); |
| 329 | goto error; |
| 330 | } |
| 331 | |
| 332 | if (!state->short_opt_ch) { |
| 333 | state->short_opt_ch = short_opts; |
| 334 | } |
| 335 | |
| 336 | const char *opt_arg = NULL; |
| 337 | const struct argpar_opt_descr *descr; |
| 338 | struct argpar_item_opt *opt_item; |
| 339 | |
| 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 | } |
| 348 | |
| 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; |
| 357 | } |
| 358 | |
| 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; |
| 369 | goto error; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | /* Create and append option argument */ |
| 374 | opt_item = create_opt_item(descr, opt_arg); |
| 375 | if (!opt_item) { |
| 376 | goto error; |
| 377 | } |
| 378 | |
| 379 | *item = &opt_item->base; |
| 380 | |
| 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 | } |
| 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, |
| 409 | struct argpar_state *state, |
| 410 | char **error, |
| 411 | struct argpar_item **item) |
| 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; |
| 417 | bool used_next_orig_arg = false; |
| 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) { |
| 432 | argpar_string_append_printf(error, |
| 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) { |
| 444 | argpar_string_append_printf(error, |
| 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) { |
| 457 | argpar_string_append_printf(error, |
| 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) { |
| 471 | argpar_string_append_printf(error, |
| 472 | "Missing required argument for option `--%s`", |
| 473 | long_opt_name); |
| 474 | goto error; |
| 475 | } |
| 476 | |
| 477 | opt_arg = next_orig_arg; |
| 478 | used_next_orig_arg = true; |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | /* Create and append option argument */ |
| 483 | opt_item = create_opt_item(descr, opt_arg); |
| 484 | if (!opt_item) { |
| 485 | goto error; |
| 486 | } |
| 487 | |
| 488 | if (used_next_orig_arg) { |
| 489 | state->i += 2; |
| 490 | } else { |
| 491 | state->i += 1; |
| 492 | } |
| 493 | |
| 494 | *item = &opt_item->base; |
| 495 | goto end; |
| 496 | |
| 497 | error: |
| 498 | if (ret == PARSE_ORIG_ARG_OPT_RET_OK) { |
| 499 | ret = PARSE_ORIG_ARG_OPT_RET_ERROR; |
| 500 | } |
| 501 | |
| 502 | end: |
| 503 | return ret; |
| 504 | } |
| 505 | |
| 506 | static |
| 507 | enum parse_orig_arg_opt_ret parse_orig_arg_opt(const char * const orig_arg, |
| 508 | const char * const next_orig_arg, |
| 509 | const struct argpar_opt_descr * const descrs, |
| 510 | struct argpar_state *state, |
| 511 | char **error, |
| 512 | struct argpar_item **item) |
| 513 | { |
| 514 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; |
| 515 | |
| 516 | ARGPAR_ASSERT(orig_arg[0] == '-'); |
| 517 | |
| 518 | if (orig_arg[1] == '-') { |
| 519 | /* Long option */ |
| 520 | ret = parse_long_opt(&orig_arg[2], |
| 521 | next_orig_arg, descrs, state, error, item); |
| 522 | } else { |
| 523 | /* Short option */ |
| 524 | ret = parse_short_opts(&orig_arg[1], |
| 525 | next_orig_arg, descrs, state, error, item); |
| 526 | } |
| 527 | |
| 528 | return ret; |
| 529 | } |
| 530 | |
| 531 | static |
| 532 | bool prepend_while_parsing_arg_to_error(char **error, |
| 533 | const unsigned int i, const char * const arg) |
| 534 | { |
| 535 | char *new_error; |
| 536 | bool success; |
| 537 | |
| 538 | ARGPAR_ASSERT(error); |
| 539 | ARGPAR_ASSERT(*error); |
| 540 | |
| 541 | new_error = argpar_asprintf("While parsing argument #%u (`%s`): %s", |
| 542 | i + 1, arg, *error); |
| 543 | if (!new_error) { |
| 544 | success = false; |
| 545 | goto end; |
| 546 | } |
| 547 | |
| 548 | free(*error); |
| 549 | *error = new_error; |
| 550 | success = true; |
| 551 | |
| 552 | end: |
| 553 | return success; |
| 554 | } |
| 555 | |
| 556 | ARGPAR_HIDDEN |
| 557 | struct argpar_state *argpar_state_create( |
| 558 | unsigned int argc, |
| 559 | const char * const *argv, |
| 560 | const struct argpar_opt_descr * const descrs) |
| 561 | { |
| 562 | struct argpar_state *state; |
| 563 | |
| 564 | state = argpar_zalloc(struct argpar_state); |
| 565 | if (!state) { |
| 566 | goto end; |
| 567 | } |
| 568 | |
| 569 | state->argc = argc; |
| 570 | state->argv = argv; |
| 571 | state->descrs = descrs; |
| 572 | |
| 573 | end: |
| 574 | return state; |
| 575 | } |
| 576 | |
| 577 | ARGPAR_HIDDEN |
| 578 | void argpar_state_destroy(struct argpar_state *state) |
| 579 | { |
| 580 | free(state); |
| 581 | } |
| 582 | |
| 583 | ARGPAR_HIDDEN |
| 584 | enum argpar_state_parse_next_status argpar_state_parse_next( |
| 585 | struct argpar_state *state, |
| 586 | struct argpar_item **item, |
| 587 | char **error) |
| 588 | { |
| 589 | enum argpar_state_parse_next_status status; |
| 590 | |
| 591 | ARGPAR_ASSERT(state->i <= state->argc); |
| 592 | |
| 593 | *error = NULL; |
| 594 | |
| 595 | if (state->i == state->argc) { |
| 596 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_END; |
| 597 | goto end; |
| 598 | } |
| 599 | |
| 600 | enum parse_orig_arg_opt_ret parse_orig_arg_opt_ret; |
| 601 | const char * const orig_arg = state->argv[state->i]; |
| 602 | const char * const next_orig_arg = |
| 603 | state->i < (state->argc - 1) ? state->argv[state->i + 1] : NULL; |
| 604 | |
| 605 | if (orig_arg[0] != '-') { |
| 606 | /* Non-option argument */ |
| 607 | struct argpar_item_non_opt *non_opt_item = |
| 608 | create_non_opt_item(orig_arg, state->i, state->non_opt_index); |
| 609 | |
| 610 | if (!non_opt_item) { |
| 611 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; |
| 612 | goto end; |
| 613 | } |
| 614 | |
| 615 | state->non_opt_index++; |
| 616 | state->i++; |
| 617 | |
| 618 | *item = &non_opt_item->base; |
| 619 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; |
| 620 | goto end; |
| 621 | } |
| 622 | |
| 623 | /* Option argument */ |
| 624 | parse_orig_arg_opt_ret = parse_orig_arg_opt(orig_arg, |
| 625 | next_orig_arg, state->descrs, state, error, item); |
| 626 | switch (parse_orig_arg_opt_ret) { |
| 627 | case PARSE_ORIG_ARG_OPT_RET_OK: |
| 628 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_OK; |
| 629 | break; |
| 630 | case PARSE_ORIG_ARG_OPT_RET_ERROR_UNKNOWN_OPT: |
| 631 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT; |
| 632 | break;; |
| 633 | case PARSE_ORIG_ARG_OPT_RET_ERROR: |
| 634 | prepend_while_parsing_arg_to_error( |
| 635 | error, state->i, orig_arg); |
| 636 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; |
| 637 | break; |
| 638 | default: |
| 639 | abort(); |
| 640 | } |
| 641 | |
| 642 | end: |
| 643 | return status; |
| 644 | } |
| 645 | |
| 646 | ARGPAR_HIDDEN |
| 647 | int argpar_state_get_ingested_orig_args(struct argpar_state *state) |
| 648 | { |
| 649 | return state->i; |
| 650 | } |
| 651 | |
| 652 | ARGPAR_HIDDEN |
| 653 | struct argpar_parse_ret argpar_parse(unsigned int argc, |
| 654 | const char * const *argv, |
| 655 | const struct argpar_opt_descr * const descrs, |
| 656 | bool fail_on_unknown_opt) |
| 657 | { |
| 658 | struct argpar_parse_ret parse_ret = { 0 }; |
| 659 | struct argpar_item *item = NULL; |
| 660 | struct argpar_state *state = NULL; |
| 661 | |
| 662 | parse_ret.items = new_item_array(); |
| 663 | if (!parse_ret.items) { |
| 664 | parse_ret.error = strdup("Failed to create items array."); |
| 665 | ARGPAR_ASSERT(parse_ret.error); |
| 666 | goto error; |
| 667 | } |
| 668 | |
| 669 | state = argpar_state_create(argc, argv, descrs); |
| 670 | if (!state) { |
| 671 | parse_ret.error = strdup("Failed to create argpar state."); |
| 672 | ARGPAR_ASSERT(parse_ret.error); |
| 673 | goto error; |
| 674 | } |
| 675 | |
| 676 | while (true) { |
| 677 | enum argpar_state_parse_next_status status; |
| 678 | |
| 679 | status = argpar_state_parse_next(state, &item, &parse_ret.error); |
| 680 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { |
| 681 | goto error; |
| 682 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { |
| 683 | break; |
| 684 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 685 | if (fail_on_unknown_opt) { |
| 686 | parse_ret.ingested_orig_args = |
| 687 | argpar_state_get_ingested_orig_args(state); |
| 688 | prepend_while_parsing_arg_to_error( |
| 689 | &parse_ret.error, parse_ret.ingested_orig_args, |
| 690 | argv[parse_ret.ingested_orig_args]); |
| 691 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; |
| 692 | goto error; |
| 693 | } |
| 694 | |
| 695 | free(parse_ret.error); |
| 696 | parse_ret.error = NULL; |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | ARGPAR_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 701 | |
| 702 | if (!push_item(parse_ret.items, item)) { |
| 703 | goto error; |
| 704 | } |
| 705 | item = NULL; |
| 706 | } |
| 707 | |
| 708 | ARGPAR_ASSERT(!parse_ret.error); |
| 709 | parse_ret.ingested_orig_args = |
| 710 | argpar_state_get_ingested_orig_args(state); |
| 711 | goto end; |
| 712 | |
| 713 | error: |
| 714 | ARGPAR_ASSERT(parse_ret.error); |
| 715 | |
| 716 | /* That's how we indicate that an error occurred */ |
| 717 | destroy_item_array(parse_ret.items); |
| 718 | parse_ret.items = NULL; |
| 719 | |
| 720 | end: |
| 721 | argpar_state_destroy(state); |
| 722 | argpar_item_destroy(item); |
| 723 | return parse_ret; |
| 724 | } |
| 725 | |
| 726 | ARGPAR_HIDDEN |
| 727 | void argpar_parse_ret_fini(struct argpar_parse_ret *ret) |
| 728 | { |
| 729 | ARGPAR_ASSERT(ret); |
| 730 | |
| 731 | destroy_item_array(ret->items); |
| 732 | ret->items = NULL; |
| 733 | |
| 734 | free(ret->error); |
| 735 | ret->error = NULL; |
| 736 | } |