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1 | /* Hierarchial argument parsing, layered over getopt |
2 | Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | Written by Miles Bader <miles@gnu.ai.mit.edu>. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public License as | |
8 | published by the Free Software Foundation; either version 2 of the | |
9 | License, or (at your option) any later version. | |
10 | ||
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | #include <config.h> | |
23 | #endif | |
24 | ||
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <unistd.h> | |
28 | #include <limits.h> | |
29 | #include <getopt.h> | |
30 | ||
31 | #ifndef _ | |
32 | /* This is for other GNU distributions with internationalized messages. | |
33 | When compiling libc, the _ macro is predefined. */ | |
34 | #ifdef HAVE_LIBINTL_H | |
35 | # include <libintl.h> | |
36 | # define _(msgid) gettext (msgid) | |
37 | #else | |
38 | # define _(msgid) (msgid) | |
39 | # define gettext(msgid) (msgid) | |
40 | #endif | |
41 | #endif | |
42 | ||
43 | #if _LIBC - 0 | |
44 | #include <libc-lock.h> | |
45 | #else | |
46 | #ifdef HAVE_CTHREADS_H | |
47 | #include <cthreads.h> | |
48 | #endif | |
49 | #endif /* _LIBC */ | |
50 | ||
51 | #include "argp.h" | |
52 | #include "argp-namefrob.h" | |
53 | ||
54 | /* Getopt return values. */ | |
55 | #define KEY_END (-1) /* The end of the options. */ | |
56 | #define KEY_ARG 1 /* A non-option argument. */ | |
57 | #define KEY_ERR '?' /* An error parsing the options. */ | |
58 | ||
59 | /* The meta-argument used to prevent any further arguments being interpreted | |
60 | as options. */ | |
61 | #define QUOTE "--" | |
62 | ||
63 | /* The number of bits we steal in a long-option value for our own use. */ | |
64 | #define GROUP_BITS CHAR_BIT | |
65 | ||
66 | /* The number of bits available for the user value. */ | |
67 | #define USER_BITS ((sizeof ((struct option *)0)->val * CHAR_BIT) - GROUP_BITS) | |
68 | #define USER_MASK ((1 << USER_BITS) - 1) | |
69 | ||
70 | /* EZ alias for ARGP_ERR_UNKNOWN. */ | |
71 | #define EBADKEY ARGP_ERR_UNKNOWN | |
72 | \f | |
73 | /* Default options. */ | |
74 | ||
75 | /* When argp is given the --HANG switch, _ARGP_HANG is set and argp will sleep | |
76 | for one second intervals, decrementing _ARGP_HANG until it's zero. Thus | |
77 | you can force the program to continue by attaching a debugger and setting | |
78 | it to 0 yourself. */ | |
79 | volatile int _argp_hang = 0; | |
80 | ||
81 | #define OPT_PROGNAME -2 | |
82 | #define OPT_USAGE -3 | |
83 | #define OPT_HANG -4 | |
84 | ||
85 | static const struct argp_option argp_default_options[] = | |
86 | { | |
87 | {"help", '?', 0, 0, "Give this help list", -1}, | |
88 | {"usage", OPT_USAGE, 0, 0, "Give a short usage message"}, | |
89 | {"program-name",OPT_PROGNAME,"NAME", OPTION_HIDDEN, "Set the program name"}, | |
90 | {"HANG", OPT_HANG, "SECS", OPTION_ARG_OPTIONAL | OPTION_HIDDEN, | |
91 | "Hang for SECS seconds (default 3600)"}, | |
92 | {0, 0} | |
93 | }; | |
94 | ||
95 | static error_t | |
96 | argp_default_parser (int key, char *arg, struct argp_state *state) | |
97 | { | |
98 | switch (key) | |
99 | { | |
100 | case '?': | |
101 | __argp_state_help (state, state->out_stream, ARGP_HELP_STD_HELP); | |
102 | break; | |
103 | case OPT_USAGE: | |
104 | __argp_state_help (state, state->out_stream, | |
105 | ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK); | |
106 | break; | |
107 | ||
108 | case OPT_PROGNAME: /* Set the program name. */ | |
109 | program_invocation_name = arg; | |
110 | ||
111 | /* [Note that some systems only have PROGRAM_INVOCATION_SHORT_NAME (aka | |
112 | __PROGNAME), in which case, PROGRAM_INVOCATION_NAME is just defined | |
113 | to be that, so we have to be a bit careful here.] */ | |
114 | arg = strrchr (arg, '/'); | |
115 | if (arg) | |
116 | program_invocation_short_name = arg + 1; | |
117 | else | |
118 | program_invocation_short_name = program_invocation_name; | |
119 | ||
120 | if ((state->flags & (ARGP_PARSE_ARGV0 | ARGP_NO_ERRS)) | |
121 | == ARGP_PARSE_ARGV0) | |
122 | state->argv[0] = program_invocation_name; /* Update what getopt uses too. */ | |
123 | ||
124 | break; | |
125 | ||
126 | case OPT_HANG: | |
127 | _argp_hang = atoi (arg ? arg : "3600"); | |
128 | while (_argp_hang-- > 0) | |
129 | __sleep (1); | |
130 | break; | |
131 | ||
132 | default: | |
133 | return EBADKEY; | |
134 | } | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static const struct argp argp_default_argp = | |
139 | {argp_default_options, &argp_default_parser}; | |
140 | ||
141 | \f | |
142 | static const struct argp_option argp_version_options[] = | |
143 | { | |
144 | {"version", 'V', 0, 0, "Print program version", -1}, | |
145 | {0, 0} | |
146 | }; | |
147 | ||
148 | static error_t | |
149 | argp_version_parser (int key, char *arg, struct argp_state *state) | |
150 | { | |
151 | switch (key) | |
152 | { | |
153 | case 'V': | |
154 | if (argp_program_version_hook) | |
155 | (*argp_program_version_hook) (state->out_stream, state); | |
156 | else if (argp_program_version) | |
157 | fprintf (state->out_stream, "%s\n", argp_program_version); | |
158 | else | |
159 | __argp_error (state, _("No version known!?")); | |
160 | if (! (state->flags & ARGP_NO_EXIT)) | |
161 | exit (0); | |
162 | break; | |
163 | default: | |
164 | return EBADKEY; | |
165 | } | |
166 | return 0; | |
167 | } | |
168 | ||
169 | static const struct argp argp_version_argp = | |
170 | {argp_version_options, &argp_version_parser}; | |
171 | \f | |
172 | /* Returns the offset into the getopt long options array LONG_OPTIONS of a | |
173 | long option with called NAME, or -1 if none is found. Passing NULL as | |
174 | NAME will return the number of options. */ | |
175 | static int | |
176 | find_long_option (struct option *long_options, const char *name) | |
177 | { | |
178 | struct option *l = long_options; | |
179 | while (l->name != NULL) | |
180 | if (name != NULL && strcmp (l->name, name) == 0) | |
181 | return l - long_options; | |
182 | else | |
183 | l++; | |
184 | if (name == NULL) | |
185 | return l - long_options; | |
186 | else | |
187 | return -1; | |
188 | } | |
189 | \f | |
190 | /* If we can, we regulate access to getopt, which is non-reentrant, with a | |
191 | mutex. Since the case we're trying to guard against is two different | |
192 | threads interfering, and it's possible that someone might want to call | |
193 | argp_parse recursively (they're careful), we use a recursive lock if | |
194 | possible. */ | |
195 | ||
196 | #if _LIBC - 0 | |
197 | ||
198 | __libc_lock_define_initialized_recursive (static, getopt_lock) | |
199 | #define LOCK_GETOPT __libc_lock_lock_recursive (getopt_lock) | |
200 | #define UNLOCK_GETOPT __libc_lock_unlock_recursive (getopt_lock) | |
201 | ||
202 | #else /* !_LIBC */ | |
203 | #ifdef HAVE_CTHREADS_H | |
204 | ||
205 | static struct mutex getopt_lock = MUTEX_INITIALIZER; | |
206 | #define LOCK_GETOPT mutex_lock (&getopt_lock) | |
207 | #define UNLOCK_GETOPT mutex_unlock (&getopt_lock) | |
208 | ||
209 | #else /* !HAVE_CTHREADS_H */ | |
210 | ||
211 | #define LOCK_GETOPT (void)0 | |
212 | #define UNLOCK_GETOPT (void)0 | |
213 | ||
214 | #endif /* HAVE_CTHREADS_H */ | |
215 | #endif /* _LIBC */ | |
216 | ||
217 | /* This hack to allow programs that know what's going on to call argp | |
218 | recursively. If someday argp is changed not to use the non-reentrant | |
219 | getopt interface, we can get rid of this shit. XXX */ | |
220 | void | |
221 | _argp_unlock_xxx (void) | |
222 | { | |
223 | UNLOCK_GETOPT; | |
224 | } | |
225 | \f | |
226 | /* The state of a `group' during parsing. Each group corresponds to a | |
227 | particular argp structure from the tree of such descending from the top | |
228 | level argp passed to argp_parse. */ | |
229 | struct group | |
230 | { | |
231 | /* This group's parsing function. */ | |
232 | argp_parser_t parser; | |
233 | ||
234 | /* Points to the point in SHORT_OPTS corresponding to the end of the short | |
235 | options for this group. We use it to determine from which group a | |
236 | particular short options is from. */ | |
237 | char *short_end; | |
238 | ||
239 | /* The number of non-option args sucessfully handled by this parser. */ | |
240 | unsigned args_processed; | |
241 | ||
242 | /* This group's parser's parent's group. */ | |
243 | struct group *parent; | |
244 | unsigned parent_index; /* And the our position in the parent. */ | |
245 | ||
246 | /* These fields are swapped into and out of the state structure when | |
247 | calling this group's parser. */ | |
248 | void *input, **child_inputs; | |
249 | void *hook; | |
250 | }; | |
251 | ||
252 | /* Call GROUP's parser with KEY and ARG, swapping any group-specific info | |
253 | from STATE before calling, and back into state afterwards. If GROUP has | |
254 | no parser, EBADKEY is returned. */ | |
255 | static error_t | |
256 | group_parse (struct group *group, struct argp_state *state, int key, char *arg) | |
257 | { | |
258 | if (group->parser) | |
259 | { | |
260 | error_t err; | |
261 | state->hook = group->hook; | |
262 | state->input = group->input; | |
263 | state->child_inputs = group->child_inputs; | |
264 | state->arg_num = group->args_processed; | |
265 | err = (*group->parser)(key, arg, state); | |
266 | group->hook = state->hook; | |
267 | return err; | |
268 | } | |
269 | else | |
270 | return EBADKEY; | |
271 | } | |
272 | \f | |
273 | struct parser | |
274 | { | |
275 | const struct argp *argp; | |
276 | ||
277 | /* SHORT_OPTS is the getopt short options string for the union of all the | |
278 | groups of options. */ | |
279 | char *short_opts; | |
280 | /* LONG_OPTS is the array of getop long option structures for the union of | |
281 | all the groups of options. */ | |
282 | struct option *long_opts; | |
283 | ||
284 | /* States of the various parsing groups. */ | |
285 | struct group *groups; | |
286 | /* The end of the GROUPS array. */ | |
287 | struct group *egroup; | |
288 | /* An vector containing storage for the CHILD_INPUTS field in all groups. */ | |
289 | void **child_inputs; | |
290 | ||
291 | /* True if we think using getopt is still useful; if false, then | |
292 | remaining arguments are just passed verbatim with ARGP_KEY_ARG. This is | |
293 | cleared whenever getopt returns KEY_END, but may be set again if the user | |
294 | moves the next argument pointer backwards. */ | |
295 | int try_getopt; | |
296 | ||
297 | /* State block supplied to parsing routines. */ | |
298 | struct argp_state state; | |
299 | ||
300 | /* Memory used by this parser. */ | |
301 | void *storage; | |
302 | }; | |
303 | \f | |
304 | /* The next usable entries in the various parser tables being filled in by | |
305 | convert_options. */ | |
306 | struct parser_convert_state | |
307 | { | |
308 | struct parser *parser; | |
309 | char *short_end; | |
310 | struct option *long_end; | |
311 | void **child_inputs_end; | |
312 | }; | |
313 | ||
314 | /* Converts all options in ARGP (which is put in GROUP) and ancestors | |
315 | into getopt options stored in SHORT_OPTS and LONG_OPTS; SHORT_END and | |
316 | CVT->LONG_END are the points at which new options are added. Returns the | |
317 | next unused group entry. CVT holds state used during the conversion. */ | |
318 | static struct group * | |
319 | convert_options (const struct argp *argp, | |
320 | struct group *parent, unsigned parent_index, | |
321 | struct group *group, struct parser_convert_state *cvt) | |
322 | { | |
323 | /* REAL is the most recent non-alias value of OPT. */ | |
324 | const struct argp_option *real = argp->options; | |
325 | const struct argp_child *children = argp->children; | |
326 | ||
327 | if (real || argp->parser) | |
328 | { | |
329 | const struct argp_option *opt; | |
330 | ||
331 | if (real) | |
332 | for (opt = real; !__option_is_end (opt); opt++) | |
333 | { | |
334 | if (! (opt->flags & OPTION_ALIAS)) | |
335 | /* OPT isn't an alias, so we can use values from it. */ | |
336 | real = opt; | |
337 | ||
338 | if (! (real->flags & OPTION_DOC)) | |
339 | /* A real option (not just documentation). */ | |
340 | { | |
341 | if (__option_is_short (opt)) | |
342 | /* OPT can be used as a short option. */ | |
343 | { | |
344 | *cvt->short_end++ = opt->key; | |
345 | if (real->arg) | |
346 | { | |
347 | *cvt->short_end++ = ':'; | |
348 | if (real->flags & OPTION_ARG_OPTIONAL) | |
349 | *cvt->short_end++ = ':'; | |
350 | } | |
351 | *cvt->short_end = '\0'; /* keep 0 terminated */ | |
352 | } | |
353 | ||
354 | if (opt->name | |
355 | && find_long_option (cvt->parser->long_opts, opt->name) < 0) | |
356 | /* OPT can be used as a long option. */ | |
357 | { | |
358 | cvt->long_end->name = opt->name; | |
359 | cvt->long_end->has_arg = | |
360 | (real->arg | |
361 | ? (real->flags & OPTION_ARG_OPTIONAL | |
362 | ? optional_argument | |
363 | : required_argument) | |
364 | : no_argument); | |
365 | cvt->long_end->flag = 0; | |
366 | /* we add a disambiguating code to all the user's | |
367 | values (which is removed before we actually call | |
368 | the function to parse the value); this means that | |
369 | the user loses use of the high 8 bits in all his | |
370 | values (the sign of the lower bits is preserved | |
371 | however)... */ | |
372 | cvt->long_end->val = | |
373 | ((opt->key | real->key) & USER_MASK) | |
374 | + (((group - cvt->parser->groups) + 1) << USER_BITS); | |
375 | ||
376 | /* Keep the LONG_OPTS list terminated. */ | |
377 | (++cvt->long_end)->name = NULL; | |
378 | } | |
379 | } | |
380 | } | |
381 | ||
382 | group->parser = argp->parser; | |
383 | group->short_end = cvt->short_end; | |
384 | group->args_processed = 0; | |
385 | group->parent = parent; | |
386 | group->parent_index = parent_index; | |
387 | group->input = 0; | |
388 | group->hook = 0; | |
389 | group->child_inputs = 0; | |
390 | ||
391 | if (children) | |
392 | /* Assign GROUP's CHILD_INPUTS field some space from | |
393 | CVT->child_inputs_end.*/ | |
394 | { | |
395 | unsigned num_children = 0; | |
396 | while (children[num_children].argp) | |
397 | num_children++; | |
398 | group->child_inputs = cvt->child_inputs_end; | |
399 | cvt->child_inputs_end += num_children; | |
400 | } | |
401 | ||
402 | parent = group++; | |
403 | } | |
404 | else | |
405 | parent = 0; | |
406 | ||
407 | if (children) | |
408 | { | |
409 | unsigned index = 0; | |
410 | while (children->argp) | |
411 | group = | |
412 | convert_options (children++->argp, parent, index++, group, cvt); | |
413 | } | |
414 | ||
415 | return group; | |
416 | } | |
417 | ||
418 | /* Find the merged set of getopt options, with keys appropiately prefixed. */ | |
419 | static void | |
420 | parser_convert (struct parser *parser, const struct argp *argp, int flags) | |
421 | { | |
422 | struct parser_convert_state cvt; | |
423 | ||
424 | cvt.parser = parser; | |
425 | cvt.short_end = parser->short_opts; | |
426 | cvt.long_end = parser->long_opts; | |
427 | cvt.child_inputs_end = parser->child_inputs; | |
428 | ||
429 | if (flags & ARGP_IN_ORDER) | |
430 | *cvt.short_end++ = '-'; | |
431 | else if (flags & ARGP_NO_ARGS) | |
432 | *cvt.short_end++ = '+'; | |
433 | *cvt.short_end = '\0'; | |
434 | ||
435 | cvt.long_end->name = NULL; | |
436 | ||
437 | parser->argp = argp; | |
438 | ||
439 | if (argp) | |
440 | parser->egroup = convert_options (argp, 0, 0, parser->groups, &cvt); | |
441 | else | |
442 | parser->egroup = parser->groups; /* No parsers at all! */ | |
443 | } | |
444 | \f | |
445 | /* Lengths of various parser fields which we will allocated. */ | |
446 | struct parser_sizes | |
447 | { | |
448 | size_t short_len; /* Getopt short options string. */ | |
449 | size_t long_len; /* Getopt long options vector. */ | |
450 | size_t num_groups; /* Group structures we allocate. */ | |
451 | size_t num_child_inputs; /* Child input slots. */ | |
452 | }; | |
453 | ||
454 | /* For ARGP, increments the NUM_GROUPS field in SZS by the total number of | |
455 | argp structures descended from it, and the SHORT_LEN & LONG_LEN fields by | |
456 | the maximum lengths of the resulting merged getopt short options string and | |
457 | long-options array, respectively. */ | |
458 | static void | |
459 | calc_sizes (const struct argp *argp, struct parser_sizes *szs) | |
460 | { | |
461 | const struct argp_child *child = argp->children; | |
462 | const struct argp_option *opt = argp->options; | |
463 | ||
464 | if (opt || argp->parser) | |
465 | { | |
466 | szs->num_groups++; | |
467 | if (opt) | |
468 | { | |
469 | int num_opts = 0; | |
470 | while (!__option_is_end (opt++)) | |
471 | num_opts++; | |
472 | szs->short_len += num_opts * 3; /* opt + up to 2 `:'s */ | |
473 | szs->long_len += num_opts; | |
474 | } | |
475 | } | |
476 | ||
477 | if (child) | |
478 | while (child->argp) | |
479 | { | |
480 | calc_sizes ((child++)->argp, szs); | |
481 | szs->num_child_inputs++; | |
482 | } | |
483 | } | |
484 | ||
485 | /* Initializes PARSER to parse ARGP in a manner described by FLAGS. */ | |
486 | static error_t | |
487 | parser_init (struct parser *parser, const struct argp *argp, | |
488 | int argc, char **argv, int flags, void *input) | |
489 | { | |
490 | error_t err = 0; | |
491 | struct group *group; | |
492 | struct parser_sizes szs; | |
493 | ||
494 | szs.short_len = (flags & ARGP_NO_ARGS) ? 0 : 1; | |
495 | szs.long_len = 0; | |
496 | szs.num_groups = 0; | |
497 | szs.num_child_inputs = 0; | |
498 | ||
499 | if (argp) | |
500 | calc_sizes (argp, &szs); | |
501 | ||
502 | /* Lengths of the various bits of storage used by PARSER. */ | |
503 | #define GLEN (szs.num_groups + 1) * sizeof (struct group) | |
504 | #define CLEN (szs.num_child_inputs * sizeof (void *)) | |
505 | #define LLEN ((szs.long_len + 1) * sizeof (struct option)) | |
506 | #define SLEN (szs.short_len + 1) | |
507 | ||
508 | parser->storage = malloc (GLEN + CLEN + LLEN + SLEN); | |
509 | if (! parser->storage) | |
510 | return ENOMEM; | |
511 | ||
512 | parser->groups = parser->storage; | |
513 | parser->child_inputs = parser->storage + GLEN; | |
514 | parser->long_opts = parser->storage + GLEN + CLEN; | |
515 | parser->short_opts = parser->storage + GLEN + CLEN + LLEN; | |
516 | ||
517 | memset (parser->child_inputs, 0, szs.num_child_inputs * sizeof (void *)); | |
518 | parser_convert (parser, argp, flags); | |
519 | ||
520 | parser->try_getopt = 1; | |
521 | ||
522 | memset (&parser->state, 0, sizeof (struct argp_state)); | |
523 | parser->state.argp = parser->argp; | |
524 | parser->state.argc = argc; | |
525 | parser->state.argv = argv; | |
526 | parser->state.err_stream = stderr; | |
527 | parser->state.out_stream = stdout; | |
528 | parser->state.next = 0; /* Tell getopt to initialize. */ | |
529 | ||
530 | /* Call each parser for the first time, giving it a chance to propagate | |
531 | values to child parsers. */ | |
532 | if (parser->groups < parser->egroup) | |
533 | parser->groups->input = input; | |
534 | for (group = parser->groups; | |
535 | group < parser->egroup && (!err || err == EBADKEY); | |
536 | group++) | |
537 | { | |
538 | if (group->parent) | |
539 | /* If a child parser, get the initial input value from the parent. */ | |
540 | group->input = group->parent->child_inputs[group->parent_index]; | |
541 | err = group_parse (group, &parser->state, ARGP_KEY_INIT, 0); | |
542 | } | |
543 | if (err == EBADKEY) | |
544 | err = 0; /* Some parser didn't understand. */ | |
545 | ||
546 | if (err) | |
547 | return err; | |
548 | ||
549 | if (parser->state.argv == argv && argv[0]) | |
550 | /* There's an argv[0]; use it for messages. */ | |
551 | parser->state.name = argv[0]; | |
552 | else | |
553 | parser->state.name = program_invocation_name; | |
554 | ||
555 | /* Getopt is (currently) non-reentrant. */ | |
556 | LOCK_GETOPT; | |
557 | ||
558 | if (parser->state.flags & ARGP_NO_ERRS) | |
559 | { | |
560 | opterr = 0; | |
561 | if (parser->state.flags & ARGP_PARSE_ARGV0) | |
562 | /* getopt always skips ARGV[0], so we have to fake it out. As long | |
563 | as OPTERR is 0, then it shouldn't actually try to access it. */ | |
564 | parser->state.argv--, parser->state.argc++; | |
565 | } | |
566 | else | |
567 | opterr = 1; /* Print error messages. */ | |
568 | ||
569 | return 0; | |
570 | } | |
571 | \f | |
572 | /* Free any storage consumed by PARSER (but not PARSER itself). */ | |
573 | static error_t | |
574 | parser_finalize (struct parser *parser, | |
575 | error_t err, int arg_ebadkey, int *end_index) | |
576 | { | |
577 | struct group *group; | |
578 | ||
579 | UNLOCK_GETOPT; | |
580 | ||
581 | if (err == EBADKEY && arg_ebadkey) | |
582 | /* Suppress errors generated by unparsed arguments. */ | |
583 | err = 0; | |
584 | ||
585 | if (! err) | |
586 | if (parser->state.next == parser->state.argc) | |
587 | /* We successfully parsed all arguments! Call all the parsers again, | |
588 | just a few more times... */ | |
589 | { | |
590 | for (group = parser->groups; | |
591 | group < parser->egroup && (!err || err==EBADKEY); | |
592 | group++) | |
593 | if (group->args_processed == 0) | |
594 | err = group_parse (group, &parser->state, ARGP_KEY_NO_ARGS, 0); | |
595 | for (group = parser->groups; | |
596 | group < parser->egroup && (!err || err==EBADKEY); | |
597 | group++) | |
598 | err = group_parse (group, &parser->state, ARGP_KEY_END, 0); | |
599 | ||
600 | if (err == EBADKEY) | |
601 | err = 0; /* Some parser didn't understand. */ | |
602 | } | |
603 | else if (end_index) | |
604 | /* Return any remaining arguments to the user. */ | |
605 | *end_index = parser->state.next; | |
606 | else | |
607 | /* No way to return the remaining arguments, they must be bogus. */ | |
608 | { | |
609 | if (!(parser->state.flags & ARGP_NO_ERRS) && parser->state.err_stream) | |
610 | fprintf (parser->state.err_stream, | |
611 | _("%s: Too many arguments\n"), parser->state.name); | |
612 | err = EBADKEY; | |
613 | } | |
614 | ||
615 | /* Okay, we're all done, with either an error or success. We only call the | |
616 | parsers once more, to indicate which one. */ | |
617 | ||
618 | if (err) | |
619 | { | |
620 | /* Maybe print an error message. */ | |
621 | if (err == EBADKEY) | |
622 | /* An appropriate message describing what the error was should have | |
623 | been printed earlier. */ | |
624 | __argp_state_help (&parser->state, parser->state.err_stream, | |
625 | ARGP_HELP_STD_ERR); | |
626 | ||
627 | /* Since we didn't exit, give each parser an error indication. */ | |
628 | for (group = parser->groups; group < parser->egroup; group++) | |
629 | group_parse (group, &parser->state, ARGP_KEY_ERROR, 0); | |
630 | } | |
631 | else | |
632 | /* Do final cleanup, including propagating back values from parsers. */ | |
633 | { | |
634 | /* We pass over the groups in reverse order so that child groups are | |
635 | given a chance to do there processing before passing back a value to | |
636 | the parent. */ | |
637 | for (group = parser->egroup - 1 | |
638 | ; group >= parser->groups && (!err || err == EBADKEY) | |
639 | ; group--) | |
640 | err = group_parse (group, &parser->state, ARGP_KEY_SUCCESS, 0); | |
641 | if (err == EBADKEY) | |
642 | err = 0; /* Some parser didn't understand. */ | |
643 | } | |
644 | ||
645 | if (err == EBADKEY) | |
646 | err = EINVAL; | |
647 | ||
648 | free (parser->storage); | |
649 | ||
650 | return err; | |
651 | } | |
652 | \f | |
653 | /* Call the user parsers to parse the non-option argument VAL, at the current | |
654 | position, returning any error. */ | |
655 | static error_t | |
656 | parser_parse_arg (struct parser *parser, char *val) | |
657 | { | |
658 | int index = parser->state.next; | |
659 | error_t err = EBADKEY; | |
660 | struct group *group; | |
661 | ||
662 | for (group = parser->groups | |
663 | ; group < parser->egroup && err == EBADKEY | |
664 | ; group++) | |
665 | err = group_parse (group, &parser->state, ARGP_KEY_ARG, val); | |
666 | ||
667 | if (!err) | |
668 | if (parser->state.next >= index) | |
669 | /* Remember that we successfully processed a non-option | |
670 | argument -- but only if the user hasn't gotten tricky and set | |
671 | the clock back. */ | |
672 | (--group)->args_processed++; | |
673 | else | |
674 | /* The user wants to reparse some args, give getopt another try. */ | |
675 | parser->try_getopt = 1; | |
676 | ||
677 | return err; | |
678 | } | |
679 | \f | |
680 | /* Call the user parsers to parse the option OPT, with argument VAL, at the | |
681 | current position, returning any error. */ | |
682 | static error_t | |
683 | parser_parse_opt (struct parser *parser, int opt, char *val) | |
684 | { | |
685 | /* The group key encoded in the high bits; 0 for short opts or | |
686 | group_number + 1 for long opts. */ | |
687 | int group_key = opt >> USER_BITS; | |
688 | ||
689 | if (group_key == 0) | |
690 | /* A short option. By comparing OPT's position in SHORT_OPTS to the | |
691 | various starting positions in each group's SHORT_END field, we can | |
692 | determine which group OPT came from. */ | |
693 | { | |
694 | struct group *group; | |
695 | char *short_index = strchr (parser->short_opts, opt); | |
696 | ||
697 | if (short_index) | |
698 | for (group = parser->groups; group < parser->egroup; group++) | |
699 | if (group->short_end > short_index) | |
700 | return group_parse (group, &parser->state, opt, optarg); | |
701 | ||
702 | return EBADKEY; /* until otherwise asserted */ | |
703 | } | |
704 | else | |
705 | /* A long option. We use shifts instead of masking for extracting | |
706 | the user value in order to preserve the sign. */ | |
707 | return | |
708 | group_parse (&parser->groups[group_key - 1], &parser->state, | |
709 | (opt << GROUP_BITS) >> GROUP_BITS, optarg); | |
710 | } | |
711 | \f | |
712 | /* Parse the next argument in PARSER (as indicated by PARSER->state.next). | |
713 | Any error from the parsers is returned, and *ARGP_EBADKEY indicates | |
714 | whether a value of EBADKEY is due to an unrecognized argument (which is | |
715 | generally not fatal). */ | |
716 | static error_t | |
717 | parser_parse_next (struct parser *parser, int *arg_ebadkey) | |
718 | { | |
719 | int opt; | |
720 | error_t err = 0; | |
721 | ||
722 | if (parser->state.quoted && parser->state.next < parser->state.quoted) | |
723 | /* The next argument pointer has been moved to before the quoted | |
724 | region, so pretend we never saw the quoting `--', and give getopt | |
725 | another chance. If the user hasn't removed it, getopt will just | |
726 | process it again. */ | |
727 | parser->state.quoted = 0; | |
728 | ||
729 | if (parser->try_getopt && !parser->state.quoted) | |
730 | /* Give getopt a chance to parse this. */ | |
731 | { | |
732 | optind = parser->state.next; /* Put it back in OPTIND for getopt. */ | |
733 | optopt = KEY_END; /* Distinguish KEY_ERR from a real option. */ | |
734 | if (parser->state.flags & ARGP_LONG_ONLY) | |
735 | opt = getopt_long_only (parser->state.argc, parser->state.argv, | |
736 | parser->short_opts, parser->long_opts, 0); | |
737 | else | |
738 | opt = getopt_long (parser->state.argc, parser->state.argv, | |
739 | parser->short_opts, parser->long_opts, 0); | |
740 | parser->state.next = optind; /* And see what getopt did. */ | |
741 | ||
742 | if (opt == KEY_END) | |
743 | /* Getopt says there are no more options, so stop using | |
744 | getopt; we'll continue if necessary on our own. */ | |
745 | { | |
746 | parser->try_getopt = 0; | |
747 | if (parser->state.next > 1 | |
748 | && strcmp (parser->state.argv[parser->state.next - 1], QUOTE) | |
749 | == 0) | |
750 | /* Not only is this the end of the options, but it's a | |
751 | `quoted' region, which may have args that *look* like | |
752 | options, so we definitely shouldn't try to use getopt past | |
753 | here, whatever happens. */ | |
754 | parser->state.quoted = parser->state.next; | |
755 | } | |
756 | else if (opt == KEY_ERR && optopt != KEY_END) | |
757 | /* KEY_ERR can have the same value as a valid user short | |
758 | option, but in the case of a real error, getopt sets OPTOPT | |
759 | to the offending character, which can never be KEY_END. */ | |
760 | { | |
761 | *arg_ebadkey = 0; | |
762 | return EBADKEY; | |
763 | } | |
764 | } | |
765 | else | |
766 | opt = KEY_END; | |
767 | ||
768 | if (opt == KEY_END) | |
769 | /* We're past what getopt considers the options. */ | |
770 | if (parser->state.next >= parser->state.argc | |
771 | || (parser->state.flags & ARGP_NO_ARGS)) | |
772 | /* Indicate that we're done. */ | |
773 | { | |
774 | *arg_ebadkey = 1; | |
775 | return EBADKEY; | |
776 | } | |
777 | else | |
778 | /* A non-option arg. */ | |
779 | err = | |
780 | parser_parse_arg (parser, parser->state.argv[parser->state.next++]); | |
781 | else if (opt == KEY_ARG) | |
782 | /* A non-option argument; try each parser in turn. */ | |
783 | err = parser_parse_arg (parser, optarg); | |
784 | else | |
785 | err = parser_parse_opt (parser, opt, optarg); | |
786 | ||
787 | if (err == EBADKEY) | |
788 | { | |
789 | *arg_ebadkey = (opt == KEY_END || opt == KEY_ARG); | |
790 | parser->state.next--; /* Put back the unused argument. */ | |
791 | } | |
792 | ||
793 | return err; | |
794 | } | |
795 | \f | |
796 | /* Parse the options strings in ARGC & ARGV according to the argp in ARGP. | |
797 | FLAGS is one of the ARGP_ flags above. If END_INDEX is non-NULL, the | |
798 | index in ARGV of the first unparsed option is returned in it. If an | |
799 | unknown option is present, EINVAL is returned; if some parser routine | |
800 | returned a non-zero value, it is returned; otherwise 0 is returned. */ | |
801 | error_t | |
802 | __argp_parse (const struct argp *argp, int argc, char **argv, unsigned flags, | |
803 | int *end_index, void *input) | |
804 | { | |
805 | error_t err; | |
806 | struct parser parser; | |
807 | ||
808 | /* If true, then err == EBADKEY is a result of a non-option argument failing | |
809 | to be parsed (which in some cases isn't actually an error). */ | |
810 | int arg_ebadkey = 0; | |
811 | ||
812 | if (! (flags & ARGP_NO_HELP)) | |
813 | /* Add our own options. */ | |
814 | { | |
815 | struct argp_child *child = alloca (4 * sizeof (struct argp_child)); | |
816 | struct argp *top_argp = alloca (sizeof (struct argp)); | |
817 | ||
818 | /* TOP_ARGP has no options, it just serves to group the user & default | |
819 | argps. */ | |
820 | memset (top_argp, 0, sizeof (*top_argp)); | |
821 | top_argp->children = child; | |
822 | ||
823 | memset (child, 0, 4 * sizeof (struct argp_child)); | |
824 | ||
825 | if (argp) | |
826 | (child++)->argp = argp; | |
827 | (child++)->argp = &argp_default_argp; | |
828 | if (argp_program_version || argp_program_version_hook) | |
829 | (child++)->argp = &argp_version_argp; | |
830 | child->argp = 0; | |
831 | ||
832 | argp = top_argp; | |
833 | } | |
834 | ||
835 | /* Construct a parser for these arguments. */ | |
836 | err = parser_init (&parser, argp, argc, argv, flags, input); | |
837 | ||
838 | if (! err) | |
839 | /* Parse! */ | |
840 | { | |
841 | while (! err) | |
842 | err = parser_parse_next (&parser, &arg_ebadkey); | |
843 | err = parser_finalize (&parser, err, arg_ebadkey, end_index); | |
844 | } | |
845 | ||
846 | return err; | |
847 | } | |
848 | #ifdef weak_alias | |
849 | weak_alias (__argp_parse, argp_parse) | |
850 | #endif |