| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (c) 2019-2021 Philippe Proulx <pproulx@efficios.com> |
| 5 | * Copyright (c) 2020-2021 Simon Marchi <simon.marchi@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef ARGPAR_ARGPAR_H |
| 9 | #define ARGPAR_ARGPAR_H |
| 10 | |
| 11 | #include <stdbool.h> |
| 12 | |
| 13 | /*! |
| 14 | @mainpage |
| 15 | |
| 16 | See the \ref api module. |
| 17 | |
| 18 | @addtogroup api argpar API |
| 19 | @{ |
| 20 | |
| 21 | argpar is a library which provides an iterator-based API to parse |
| 22 | command-line arguments. |
| 23 | |
| 24 | The argpar parser supports: |
| 25 | |
| 26 | <ul> |
| 27 | <li> |
| 28 | Short options without an argument, possibly tied together: |
| 29 | |
| 30 | @code{.unparsed} |
| 31 | -f -auf -n |
| 32 | @endcode |
| 33 | |
| 34 | <li> |
| 35 | Short options with arguments: |
| 36 | |
| 37 | @code{.unparsed} |
| 38 | -b 45 -f/mein/file -xyzhello |
| 39 | @endcode |
| 40 | |
| 41 | <li> |
| 42 | Long options without an argument: |
| 43 | |
| 44 | @code{.unparsed} |
| 45 | --five-guys --burger-king --pizza-hut --subway |
| 46 | @endcode |
| 47 | |
| 48 | <li> |
| 49 | Long options with arguments (two original arguments or a single |
| 50 | one with a <code>=</code> character): |
| 51 | |
| 52 | @code{.unparsed} |
| 53 | --security enable --time=18.56 |
| 54 | @endcode |
| 55 | |
| 56 | <li> |
| 57 | Non-option arguments (anything else, including |
| 58 | <code>-</code> and <code>\--</code>). |
| 59 | |
| 60 | A non-option argument cannot have the form of an option, for example |
| 61 | if you need to pass the exact relative path |
| 62 | <code>\--component</code>. In that case, you would need to pass |
| 63 | <code>./\--component</code>. There's no generic way to escape |
| 64 | <code>-</code> as of this version. |
| 65 | </ul> |
| 66 | |
| 67 | Create a parsing iterator with argpar_iter_create(), then repeatedly |
| 68 | call argpar_iter_next() to access the parsing results (items), until one |
| 69 | of: |
| 70 | |
| 71 | - There are no more arguments. |
| 72 | |
| 73 | - The argument parser encounters an error (for example, an unknown |
| 74 | option). |
| 75 | |
| 76 | - You need to stop. |
| 77 | |
| 78 | argpar_iter_create() accepts duplicate option descriptors in |
| 79 | \p descrs (argpar_iter_next() produces one item for each |
| 80 | instance). |
| 81 | |
| 82 | A parsing item (the result of argpar_iter_next()) has the type |
| 83 | #argpar_item. |
| 84 | |
| 85 | Get the type (option or non-option) of an item with |
| 86 | \link argpar_item_type(const struct argpar_item *) argpar_item_type()\endlink. |
| 87 | Each item type has its set of dedicated functions |
| 88 | (\c argpar_item_opt_ and \c argpar_item_non_opt_ prefixes). |
| 89 | |
| 90 | argpar_iter_next() produces the items in the same order that it parses |
| 91 | original arguments, including non-option arguments. This means, for |
| 92 | example, that for: |
| 93 | |
| 94 | @code{.unparsed} |
| 95 | --hello --count=23 /path/to/file -ab --type file -- magie |
| 96 | @endcode |
| 97 | |
| 98 | argpar_iter_next() produces the following items, in this order: |
| 99 | |
| 100 | -# Option item (<code>\--hello</code>). |
| 101 | -# Option item (<code>\--count</code> with argument <code>23</code>). |
| 102 | -# Non-option item (<code>/path/to/file</code>). |
| 103 | -# Option item (<code>-a</code>). |
| 104 | -# Option item (<code>-b</code>). |
| 105 | -# Option item (<code>\--type</code> with argument <code>file</code>). |
| 106 | -# Non-option item (<code>\--</code>). |
| 107 | -# Non-option item (<code>magie</code>). |
| 108 | */ |
| 109 | |
| 110 | /* |
| 111 | * If argpar is used in some shared library, we don't want said library |
| 112 | * to export its symbols, so mark them as "hidden". |
| 113 | * |
| 114 | * On Windows, symbols are local unless explicitly exported; see |
| 115 | * <https://gcc.gnu.org/wiki/Visibility>. |
| 116 | */ |
| 117 | #if defined(_WIN32) || defined(__CYGWIN__) |
| 118 | # define ARGPAR_HIDDEN |
| 119 | #else |
| 120 | # define ARGPAR_HIDDEN __attribute__((visibility("hidden"))) |
| 121 | #endif |
| 122 | |
| 123 | struct argpar_opt_descr; |
| 124 | |
| 125 | /*! |
| 126 | @name Item API |
| 127 | @{ |
| 128 | */ |
| 129 | |
| 130 | /*! |
| 131 | @brief |
| 132 | Type of a parsing item, as returned by |
| 133 | \link argpar_item_type(const struct argpar_item *) argpar_item_type()\endlink. |
| 134 | */ |
| 135 | enum argpar_item_type { |
| 136 | /// Option |
| 137 | ARGPAR_ITEM_TYPE_OPT, |
| 138 | |
| 139 | /// Non-option |
| 140 | ARGPAR_ITEM_TYPE_NON_OPT, |
| 141 | }; |
| 142 | |
| 143 | /*! |
| 144 | @struct argpar_item |
| 145 | |
| 146 | @brief |
| 147 | Opaque parsing item type |
| 148 | |
| 149 | argpar_iter_next() sets a pointer to such a type. |
| 150 | */ |
| 151 | struct argpar_item; |
| 152 | |
| 153 | /*! |
| 154 | @brief |
| 155 | Returns the type of the parsing item \p item. |
| 156 | |
| 157 | @param[in] item |
| 158 | Parsing item of which to get the type. |
| 159 | |
| 160 | @returns |
| 161 | Type of \p item. |
| 162 | |
| 163 | @pre |
| 164 | \p item is not \c NULL. |
| 165 | */ |
| 166 | /// @cond hidden_macro |
| 167 | ARGPAR_HIDDEN |
| 168 | /// @endcond |
| 169 | enum argpar_item_type argpar_item_type(const struct argpar_item *item); |
| 170 | |
| 171 | /*! |
| 172 | @brief |
| 173 | Returns the option descriptor of the option parsing item \p item. |
| 174 | |
| 175 | @param[in] item |
| 176 | Option parsing item of which to get the option descriptor. |
| 177 | |
| 178 | @returns |
| 179 | Option descriptor of \p item. |
| 180 | |
| 181 | @pre |
| 182 | \p item is not \c NULL. |
| 183 | @pre |
| 184 | \p item has the type #ARGPAR_ITEM_TYPE_OPT. |
| 185 | */ |
| 186 | /// @cond hidden_macro |
| 187 | ARGPAR_HIDDEN |
| 188 | /// @endcond |
| 189 | const struct argpar_opt_descr *argpar_item_opt_descr( |
| 190 | const struct argpar_item *item); |
| 191 | |
| 192 | /*! |
| 193 | @brief |
| 194 | Returns the argument of the option parsing item \p item, or |
| 195 | \c NULL if none. |
| 196 | |
| 197 | @param[in] item |
| 198 | Option parsing item of which to get the argument. |
| 199 | |
| 200 | @returns |
| 201 | Argument of \p item, or \c NULL if none. |
| 202 | |
| 203 | @pre |
| 204 | \p item is not \c NULL. |
| 205 | @pre |
| 206 | \p item has the type #ARGPAR_ITEM_TYPE_OPT. |
| 207 | */ |
| 208 | /// @cond hidden_macro |
| 209 | ARGPAR_HIDDEN |
| 210 | /// @endcond |
| 211 | const char *argpar_item_opt_arg(const struct argpar_item *item); |
| 212 | |
| 213 | /*! |
| 214 | @brief |
| 215 | Returns the complete original argument, pointing to one of the |
| 216 | entries of the original arguments (in \p argv, as passed to |
| 217 | argpar_iter_create()), of the non-option parsing item \p item. |
| 218 | |
| 219 | @param[in] item |
| 220 | Non-option parsing item of which to get the complete original |
| 221 | argument. |
| 222 | |
| 223 | @returns |
| 224 | Complete original argument of \p item. |
| 225 | |
| 226 | @pre |
| 227 | \p item is not \c NULL. |
| 228 | @pre |
| 229 | \p item has the type #ARGPAR_ITEM_TYPE_NON_OPT. |
| 230 | */ |
| 231 | /// @cond hidden_macro |
| 232 | ARGPAR_HIDDEN |
| 233 | /// @endcond |
| 234 | const char *argpar_item_non_opt_arg(const struct argpar_item *item); |
| 235 | |
| 236 | /*! |
| 237 | @brief |
| 238 | Returns the index, within \em all the original arguments (in |
| 239 | \p argv, as passed to argpar_iter_create()), of the non-option |
| 240 | parsing item \p item. |
| 241 | |
| 242 | For example, with the following command line (all options have no |
| 243 | argument): |
| 244 | |
| 245 | @code{.unparsed} |
| 246 | -f -m meow --just mix --kilo |
| 247 | @endcode |
| 248 | |
| 249 | The original argument index of \c meow is 2 while the original |
| 250 | argument index of \c mix is 4. |
| 251 | |
| 252 | @param[in] item |
| 253 | Non-option parsing item of which to get the original argument index. |
| 254 | |
| 255 | @returns |
| 256 | Original argument index of \p item. |
| 257 | |
| 258 | @pre |
| 259 | \p item is not \c NULL. |
| 260 | @pre |
| 261 | \p item has the type #ARGPAR_ITEM_TYPE_NON_OPT. |
| 262 | |
| 263 | @sa |
| 264 | argpar_item_non_opt_non_opt_index() -- Returns the non-option index |
| 265 | of a non-option parsing item. |
| 266 | */ |
| 267 | /// @cond hidden_macro |
| 268 | ARGPAR_HIDDEN |
| 269 | /// @endcond |
| 270 | unsigned int argpar_item_non_opt_orig_index(const struct argpar_item *item); |
| 271 | |
| 272 | /*! |
| 273 | @brief |
| 274 | Returns the index, within the parsed non-option parsing items, of |
| 275 | the non-option parsing item \p item. |
| 276 | |
| 277 | For example, with the following command line (all options have no |
| 278 | argument): |
| 279 | |
| 280 | @code{.unparsed} |
| 281 | -f -m meow --just mix --kilo |
| 282 | @endcode |
| 283 | |
| 284 | The non-option index of \c meow is 0 while the original |
| 285 | argument index of \c mix is 1. |
| 286 | |
| 287 | @param[in] item |
| 288 | Non-option parsing item of which to get the non-option index. |
| 289 | |
| 290 | @returns |
| 291 | Non-option index of \p item. |
| 292 | |
| 293 | @pre |
| 294 | \p item is not \c NULL. |
| 295 | @pre |
| 296 | \p item has the type #ARGPAR_ITEM_TYPE_NON_OPT. |
| 297 | |
| 298 | @sa |
| 299 | argpar_item_non_opt_orig_index() -- Returns the original argument |
| 300 | index of a non-option parsing item. |
| 301 | */ |
| 302 | /// @cond hidden_macro |
| 303 | ARGPAR_HIDDEN |
| 304 | /// @endcond |
| 305 | unsigned int argpar_item_non_opt_non_opt_index(const struct argpar_item *item); |
| 306 | |
| 307 | /*! |
| 308 | @brief |
| 309 | Destroys the parsing item \p item. |
| 310 | |
| 311 | @param[in] item |
| 312 | Parsing item to destroy (may be \c NULL). |
| 313 | */ |
| 314 | /// @cond hidden_macro |
| 315 | ARGPAR_HIDDEN |
| 316 | /// @endcond |
| 317 | void argpar_item_destroy(const struct argpar_item *item); |
| 318 | |
| 319 | /*! |
| 320 | @def ARGPAR_ITEM_DESTROY_AND_RESET(_item) |
| 321 | |
| 322 | @brief |
| 323 | Calls argpar_item_destroy() with \p _item, and then sets \p _item |
| 324 | to \c NULL. |
| 325 | |
| 326 | @param[in] _item |
| 327 | Item to destroy and variable to reset |
| 328 | (<code>const struct argpar_item *</code> type). |
| 329 | */ |
| 330 | #define ARGPAR_ITEM_DESTROY_AND_RESET(_item) \ |
| 331 | { \ |
| 332 | argpar_item_destroy(_item); \ |
| 333 | _item = NULL; \ |
| 334 | } |
| 335 | |
| 336 | /// @} |
| 337 | |
| 338 | /*! |
| 339 | @name Error API |
| 340 | @{ |
| 341 | */ |
| 342 | |
| 343 | /*! |
| 344 | @brief |
| 345 | Parsing error type, as returned by |
| 346 | \link argpar_error_type(const struct argpar_error *) argpar_error_type()\endlink. |
| 347 | */ |
| 348 | enum argpar_error_type { |
| 349 | /// Unknown option error |
| 350 | ARGPAR_ERROR_TYPE_UNKNOWN_OPT, |
| 351 | |
| 352 | /// Missing option argument error |
| 353 | ARGPAR_ERROR_TYPE_MISSING_OPT_ARG, |
| 354 | |
| 355 | /// Unexpected option argument error |
| 356 | ARGPAR_ERROR_TYPE_UNEXPECTED_OPT_ARG, |
| 357 | }; |
| 358 | |
| 359 | /*! |
| 360 | @struct argpar_error |
| 361 | |
| 362 | @brief |
| 363 | Opaque parsing error type |
| 364 | */ |
| 365 | struct argpar_error; |
| 366 | |
| 367 | /*! |
| 368 | @brief |
| 369 | Returns the type of the parsing error object \p error. |
| 370 | |
| 371 | @param[in] error |
| 372 | Parsing error of which to get the type. |
| 373 | |
| 374 | @returns |
| 375 | Type of \p error. |
| 376 | |
| 377 | @pre |
| 378 | \p error is not \c NULL. |
| 379 | */ |
| 380 | /// @cond hidden_macro |
| 381 | ARGPAR_HIDDEN |
| 382 | /// @endcond |
| 383 | enum argpar_error_type argpar_error_type(const struct argpar_error *error); |
| 384 | |
| 385 | /*! |
| 386 | @brief |
| 387 | Returns the index of the original argument (in \p argv, as passed to |
| 388 | argpar_iter_create()) for which the parsing error described by |
| 389 | \p error occurred. |
| 390 | |
| 391 | @param[in] error |
| 392 | Parsing error of which to get the original argument index. |
| 393 | |
| 394 | @returns |
| 395 | Original argument index of \p error. |
| 396 | |
| 397 | @pre |
| 398 | \p error is not \c NULL. |
| 399 | */ |
| 400 | /// @cond hidden_macro |
| 401 | ARGPAR_HIDDEN |
| 402 | /// @endcond |
| 403 | unsigned int argpar_error_orig_index(const struct argpar_error *error); |
| 404 | |
| 405 | /*! |
| 406 | @brief |
| 407 | Returns the name of the unknown option for which the parsing error |
| 408 | described by \p error occurred. |
| 409 | |
| 410 | The returned name includes any <code>-</code> or <code>\--</code> |
| 411 | prefix. |
| 412 | |
| 413 | With the long option with argument form, for example |
| 414 | <code>\--mireille=deyglun</code>, this function only returns the name |
| 415 | part (<code>\--mireille</code> in the last example). |
| 416 | |
| 417 | @param[in] error |
| 418 | Parsing error of which to get the name of the unknown option. |
| 419 | |
| 420 | @returns |
| 421 | Name of the unknown option of \p error. |
| 422 | |
| 423 | @pre |
| 424 | \p error is not \c NULL. |
| 425 | @pre |
| 426 | The type of \p error, as returned by |
| 427 | \link argpar_error_type(const struct argpar_error *) argpar_error_type()\endlink, |
| 428 | is #ARGPAR_ERROR_TYPE_UNKNOWN_OPT. |
| 429 | */ |
| 430 | /// @cond hidden_macro |
| 431 | ARGPAR_HIDDEN |
| 432 | /// @endcond |
| 433 | const char *argpar_error_unknown_opt_name(const struct argpar_error *error); |
| 434 | |
| 435 | /*! |
| 436 | @brief |
| 437 | Returns the descriptor of the option for which the parsing error |
| 438 | described by \p error occurred. |
| 439 | |
| 440 | @param[in] error |
| 441 | Parsing error of which to get the option descriptor. |
| 442 | @param[out] is_short |
| 443 | @parblock |
| 444 | If not \c NULL, this function sets \p *is_short to: |
| 445 | |
| 446 | - \c true if the option for which \p error occurred is a short |
| 447 | option. |
| 448 | |
| 449 | - \c false if the option for which \p error occurred is a long |
| 450 | option. |
| 451 | @endparblock |
| 452 | |
| 453 | @returns |
| 454 | Descriptor of the option of \p error. |
| 455 | |
| 456 | @pre |
| 457 | \p error is not \c NULL. |
| 458 | @pre |
| 459 | The type of \p error, as returned by |
| 460 | \link argpar_error_type(const struct argpar_error *) argpar_error_type()\endlink, |
| 461 | is #ARGPAR_ERROR_TYPE_MISSING_OPT_ARG or |
| 462 | #ARGPAR_ERROR_TYPE_UNEXPECTED_OPT_ARG. |
| 463 | */ |
| 464 | /// @cond hidden_macro |
| 465 | ARGPAR_HIDDEN |
| 466 | /// @endcond |
| 467 | const struct argpar_opt_descr *argpar_error_opt_descr( |
| 468 | const struct argpar_error *error, bool *is_short); |
| 469 | |
| 470 | /*! |
| 471 | @brief |
| 472 | Destroys the parsing error \p error. |
| 473 | |
| 474 | @param[in] error |
| 475 | Parsing error to destroy (may be \c NULL). |
| 476 | */ |
| 477 | /// @cond hidden_macro |
| 478 | ARGPAR_HIDDEN |
| 479 | /// @endcond |
| 480 | void argpar_error_destroy(const struct argpar_error *error); |
| 481 | |
| 482 | /// @} |
| 483 | |
| 484 | /*! |
| 485 | @name Iterator API |
| 486 | @{ |
| 487 | */ |
| 488 | |
| 489 | /*! |
| 490 | @brief |
| 491 | Option descriptor |
| 492 | |
| 493 | argpar_iter_create() accepts an array of instances of such a type, |
| 494 | terminated with #ARGPAR_OPT_DESCR_SENTINEL, as its \p descrs parameter. |
| 495 | |
| 496 | The typical usage is, for example: |
| 497 | |
| 498 | @code |
| 499 | const struct argpar_opt_descr descrs[] = { |
| 500 | { 0, 'd', NULL, false }, |
| 501 | { 1, '\0', "squeeze", true }, |
| 502 | { 2, 'm', "meow", true }, |
| 503 | ARGPAR_OPT_DESCR_SENTINEL, |
| 504 | }; |
| 505 | @endcode |
| 506 | */ |
| 507 | struct argpar_opt_descr { |
| 508 | /// Numeric ID, to uniquely identify this descriptor |
| 509 | const int id; |
| 510 | |
| 511 | /// Short option character, or <code>'\0'</code> |
| 512 | const char short_name; |
| 513 | |
| 514 | /// Long option name (without the <code>\--</code> prefix), or \c NULL |
| 515 | const char * const long_name; |
| 516 | |
| 517 | /// \c true if this option has an argument |
| 518 | const bool with_arg; |
| 519 | }; |
| 520 | |
| 521 | /*! |
| 522 | @brief |
| 523 | Sentinel for an option descriptor array |
| 524 | |
| 525 | The typical usage is, for example: |
| 526 | |
| 527 | @code |
| 528 | const struct argpar_opt_descr descrs[] = { |
| 529 | { 0, 'd', NULL, false }, |
| 530 | { 1, '\0', "squeeze", true }, |
| 531 | { 2, 'm', "meow", true }, |
| 532 | ARGPAR_OPT_DESCR_SENTINEL, |
| 533 | }; |
| 534 | @endcode |
| 535 | */ |
| 536 | #define ARGPAR_OPT_DESCR_SENTINEL { -1, '\0', NULL, false } |
| 537 | |
| 538 | /*! |
| 539 | @struct argpar_iter |
| 540 | |
| 541 | @brief |
| 542 | Opaque argpar iterator type |
| 543 | |
| 544 | argpar_iter_create() returns a pointer to such a type. |
| 545 | */ |
| 546 | struct argpar_iter; |
| 547 | |
| 548 | /*! |
| 549 | @brief |
| 550 | Creates and returns an argument parsing iterator to parse the |
| 551 | original arguments \p argv of which the count is \p argc using the |
| 552 | option descriptors \p descrs. |
| 553 | |
| 554 | This function initializes the returned structure, but doesn't actually |
| 555 | start parsing the arguments. |
| 556 | |
| 557 | argpar considers \em all the elements of \p argv, including the first |
| 558 | one, so that you would typically pass <code>(argc - 1)</code> as \p argc |
| 559 | and <code>\&argv[1]</code> as \p argv from what <code>main()</code> |
| 560 | receives, or ignore the parsing item of the first call to |
| 561 | argpar_iter_next(). |
| 562 | |
| 563 | \p *argv and \p *descrs must \em not change for all of: |
| 564 | |
| 565 | - The lifetime of the returned iterator (until you call |
| 566 | argpar_iter_destroy()). |
| 567 | |
| 568 | - The lifetime of any parsing item (until you call |
| 569 | argpar_item_destroy()) which argpar_iter_next() creates from the |
| 570 | returned iterator. |
| 571 | |
| 572 | - The lifetime of any parsing error (until you call |
| 573 | argpar_error_destroy()) which argpar_iter_next() creates from the |
| 574 | returned iterator. |
| 575 | |
| 576 | @param[in] argc |
| 577 | Number of original arguments to parse in \p argv. |
| 578 | @param[in] argv |
| 579 | Original arguments to parse, of which the count is \p argc. |
| 580 | @param[in] descrs |
| 581 | @parblock |
| 582 | Option descriptor array, terminated with #ARGPAR_OPT_DESCR_SENTINEL. |
| 583 | |
| 584 | May contain duplicate entries. |
| 585 | @endparblock |
| 586 | |
| 587 | @returns |
| 588 | New argument parsing iterator, or \c NULL on memory error. |
| 589 | |
| 590 | @pre |
| 591 | \p argc is greater than 0. |
| 592 | @pre |
| 593 | \p argv is not \c NULL. |
| 594 | @pre |
| 595 | The first \p argc elements of \p argv are not \c NULL. |
| 596 | @pre |
| 597 | \p descrs is not \c NULL. |
| 598 | |
| 599 | @sa |
| 600 | argpar_iter_destroy() -- Destroys an argument parsing iterator. |
| 601 | */ |
| 602 | /// @cond hidden_macro |
| 603 | ARGPAR_HIDDEN |
| 604 | /// @endcond |
| 605 | struct argpar_iter *argpar_iter_create(unsigned int argc, |
| 606 | const char * const *argv, |
| 607 | const struct argpar_opt_descr *descrs); |
| 608 | |
| 609 | /*! |
| 610 | @brief |
| 611 | Destroys the argument parsing iterator \p iter. |
| 612 | |
| 613 | @param[in] iter |
| 614 | Argument parsing iterator to destroy (may be \c NULL). |
| 615 | |
| 616 | @sa |
| 617 | argpar_iter_create() -- Creates an argument parsing iterator. |
| 618 | */ |
| 619 | /// @cond hidden_macro |
| 620 | ARGPAR_HIDDEN |
| 621 | /// @endcond |
| 622 | void argpar_iter_destroy(struct argpar_iter *iter); |
| 623 | |
| 624 | /*! |
| 625 | @brief |
| 626 | Return type of argpar_iter_next(). |
| 627 | |
| 628 | Error status enumerators have a negative value. |
| 629 | */ |
| 630 | enum argpar_iter_next_status { |
| 631 | /// Success |
| 632 | ARGPAR_ITER_NEXT_STATUS_OK, |
| 633 | |
| 634 | /// End of iteration (no more original arguments to parse) |
| 635 | ARGPAR_ITER_NEXT_STATUS_END, |
| 636 | |
| 637 | /// Parsing error |
| 638 | ARGPAR_ITER_NEXT_STATUS_ERROR = -1, |
| 639 | |
| 640 | /// Memory error |
| 641 | ARGPAR_ITER_NEXT_STATUS_ERROR_MEMORY = -12, |
| 642 | }; |
| 643 | |
| 644 | /*! |
| 645 | @brief |
| 646 | Sets \p *item to the next item of the argument parsing iterator |
| 647 | \p iter and advances \p iter. |
| 648 | |
| 649 | If there are no more original arguments to parse, this function returns |
| 650 | #ARGPAR_ITER_NEXT_STATUS_END. |
| 651 | |
| 652 | @param[in] iter |
| 653 | Argument parsing iterator from which to get the next parsing item. |
| 654 | @param[out] item |
| 655 | @parblock |
| 656 | On success, \p *item is the next parsing item of \p iter. |
| 657 | |
| 658 | Destroy \p *item with argpar_item_destroy(). |
| 659 | @endparblock |
| 660 | @param[out] error |
| 661 | @parblock |
| 662 | When this function returns #ARGPAR_ITER_NEXT_STATUS_ERROR, |
| 663 | if this parameter is not \c NULL, \p *error contains details about |
| 664 | the error. |
| 665 | |
| 666 | Destroy \p *error with argpar_error_destroy(). |
| 667 | @endparblock |
| 668 | |
| 669 | @returns |
| 670 | Status code. |
| 671 | |
| 672 | @pre |
| 673 | \p iter is not \c NULL. |
| 674 | @pre |
| 675 | \p item is not \c NULL. |
| 676 | */ |
| 677 | /// @cond hidden_macro |
| 678 | ARGPAR_HIDDEN |
| 679 | /// @endcond |
| 680 | enum argpar_iter_next_status argpar_iter_next( |
| 681 | struct argpar_iter *iter, const struct argpar_item **item, |
| 682 | const struct argpar_error **error); |
| 683 | |
| 684 | /* |
| 685 | * Returns the number of ingested elements from `argv`, as passed to |
| 686 | * argpar_iter_create() to create `*iter`, that were required to produce |
| 687 | * the previously returned items. |
| 688 | */ |
| 689 | |
| 690 | /*! |
| 691 | @brief |
| 692 | Returns the number of ingested original arguments (in |
| 693 | \p argv, as passed to argpar_iter_create() to create \p iter) that |
| 694 | the parser ingested to produce the \em previous parsing items. |
| 695 | |
| 696 | @param[in] iter |
| 697 | Argument parsing iterator of which to get the number of ingested |
| 698 | original arguments. |
| 699 | |
| 700 | @returns |
| 701 | Number of original arguments which \p iter ingested. |
| 702 | |
| 703 | @pre |
| 704 | \p iter is not \c NULL. |
| 705 | */ |
| 706 | /// @cond hidden_macro |
| 707 | ARGPAR_HIDDEN |
| 708 | /// @endcond |
| 709 | unsigned int argpar_iter_ingested_orig_args(const struct argpar_iter *iter); |
| 710 | |
| 711 | /// @} |
| 712 | |
| 713 | /// @} |
| 714 | |
| 715 | #endif /* ARGPAR_ARGPAR_H */ |