| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright 2019 Philippe Proulx <pproulx@efficios.com> |
| 5 | */ |
| 6 | |
| 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 | |
| 19 | #define ARGPAR_ASSERT(_cond) ((void) sizeof((void) (_cond), 0)) |
| 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 | |
| 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 | |
| 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 | |
| 138 | ARGPAR_HIDDEN |
| 139 | void argpar_item_destroy(struct argpar_item *item) |
| 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++) { |
| 197 | argpar_item_destroy(array->items[i]); |
| 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: |
| 258 | argpar_item_destroy(&opt_item->base); |
| 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, |
| 319 | struct argpar_state *state, |
| 320 | char **error, |
| 321 | struct argpar_item **item) |
| 322 | { |
| 323 | enum parse_orig_arg_opt_ret ret = PARSE_ORIG_ARG_OPT_RET_OK; |
| 324 | bool used_next_orig_arg = false; |
| 325 | |
| 326 | if (strlen(short_opts) == 0) { |
| 327 | argpar_string_append_printf(error, "Invalid argument"); |
| 328 | goto error; |
| 329 | } |
| 330 | |
| 331 | if (!state->short_opt_ch) { |
| 332 | state->short_opt_ch = short_opts; |
| 333 | } |
| 334 | |
| 335 | const char *opt_arg = NULL; |
| 336 | const struct argpar_opt_descr *descr; |
| 337 | struct argpar_item_opt *opt_item; |
| 338 | |
| 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 | } |
| 347 | |
| 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; |
| 356 | } |
| 357 | |
| 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; |
| 368 | goto error; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | /* Create and append option argument */ |
| 373 | opt_item = create_opt_item(descr, opt_arg); |
| 374 | if (!opt_item) { |
| 375 | goto error; |
| 376 | } |
| 377 | |
| 378 | *item = &opt_item->base; |
| 379 | |
| 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 | } |
| 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, |
| 408 | struct argpar_state *state, |
| 409 | char **error, |
| 410 | struct argpar_item **item) |
| 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; |
| 416 | bool used_next_orig_arg = false; |
| 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) { |
| 431 | argpar_string_append_printf(error, |
| 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) { |
| 443 | argpar_string_append_printf(error, |
| 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) { |
| 456 | argpar_string_append_printf(error, |
| 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) { |
| 470 | argpar_string_append_printf(error, |
| 471 | "Missing required argument for option `--%s`", |
| 472 | long_opt_name); |
| 473 | goto error; |
| 474 | } |
| 475 | |
| 476 | opt_arg = next_orig_arg; |
| 477 | used_next_orig_arg = true; |
| 478 | } |
| 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; |
| 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 | |
| 496 | if (used_next_orig_arg) { |
| 497 | state->i += 2; |
| 498 | } else { |
| 499 | state->i += 1; |
| 500 | } |
| 501 | |
| 502 | *item = &opt_item->base; |
| 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, |
| 518 | struct argpar_state *state, |
| 519 | char **error, |
| 520 | struct argpar_item **item) |
| 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], |
| 529 | next_orig_arg, descrs, state, error, item); |
| 530 | } else { |
| 531 | /* Short option */ |
| 532 | ret = parse_short_opts(&orig_arg[1], |
| 533 | next_orig_arg, descrs, state, error, item); |
| 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 | |
| 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 | |
| 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 }; |
| 667 | struct argpar_item *item = NULL; |
| 668 | struct argpar_state *state = NULL; |
| 669 | |
| 670 | parse_ret.items = new_item_array(); |
| 671 | if (!parse_ret.items) { |
| 672 | parse_ret.error = strdup("Failed to create items array."); |
| 673 | ARGPAR_ASSERT(parse_ret.error); |
| 674 | goto error; |
| 675 | } |
| 676 | |
| 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 | } |
| 683 | |
| 684 | while (true) { |
| 685 | enum argpar_state_parse_next_status status; |
| 686 | |
| 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) { |
| 691 | break; |
| 692 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { |
| 693 | if (fail_on_unknown_opt) { |
| 694 | parse_ret.ingested_orig_args = |
| 695 | argpar_state_get_ingested_orig_args(state); |
| 696 | prepend_while_parsing_arg_to_error( |
| 697 | &parse_ret.error, parse_ret.ingested_orig_args, |
| 698 | argv[parse_ret.ingested_orig_args]); |
| 699 | status = ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR; |
| 700 | goto error; |
| 701 | } |
| 702 | |
| 703 | free(parse_ret.error); |
| 704 | parse_ret.error = NULL; |
| 705 | break; |
| 706 | } |
| 707 | |
| 708 | ARGPAR_ASSERT(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); |
| 709 | |
| 710 | if (!push_item(parse_ret.items, item)) { |
| 711 | goto error; |
| 712 | } |
| 713 | item = NULL; |
| 714 | } |
| 715 | |
| 716 | ARGPAR_ASSERT(!parse_ret.error); |
| 717 | parse_ret.ingested_orig_args = |
| 718 | argpar_state_get_ingested_orig_args(state); |
| 719 | goto end; |
| 720 | |
| 721 | error: |
| 722 | ARGPAR_ASSERT(parse_ret.error); |
| 723 | |
| 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: |
| 729 | argpar_state_destroy(state); |
| 730 | argpar_item_destroy(item); |
| 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 | } |