File: argp-parse.c

package info (click to toggle)
glibc 2.28-8
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 271,788 kB
  • sloc: ansic: 1,008,637; asm: 259,607; makefile: 11,271; sh: 10,477; python: 6,910; cpp: 4,992; perl: 2,258; awk: 2,005; yacc: 290; pascal: 182; sed: 73
file content (950 lines) | stat: -rw-r--r-- 29,181 bytes parent folder | download | duplicates (4)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
/* Hierarchial argument parsing, layered over getopt
   Copyright (C) 1995-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Miles Bader <miles@gnu.ai.mit.edu>.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* AIX requires this to be the first thing in the file.  */
#ifndef __GNUC__
# if HAVE_ALLOCA_H || defined _LIBC
#  include <alloca.h>
# else
#  ifdef _AIX
#pragma alloca
#  else
#   ifndef alloca /* predefined by HP cc +Olibcalls */
char *alloca ();
#   endif
#  endif
# endif
#endif

#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <getopt.h>
#include <getopt_int.h>

#ifndef _
/* This is for other GNU distributions with internationalized messages.
   When compiling libc, the _ macro is predefined.  */
# if defined HAVE_LIBINTL_H || defined _LIBC
#  include <libintl.h>
#  ifdef _LIBC
#   undef dgettext
#   define dgettext(domain, msgid) \
  __dcgettext (domain, msgid, LC_MESSAGES)
#  endif
# else
#  define dgettext(domain, msgid) (msgid)
#  define gettext(msgid) (msgid)
# endif
#endif
#ifndef N_
# define N_(msgid) (msgid)
#endif

#include <argp.h>
#include "argp-namefrob.h"

/* Getopt return values.  */
#define KEY_END (-1)		/* The end of the options.  */
#define KEY_ARG 1		/* A non-option argument.  */
#define KEY_ERR '?'		/* An error parsing the options.  */

/* The meta-argument used to prevent any further arguments being interpreted
   as options.  */
#define QUOTE "--"

/* The number of bits we steal in a long-option value for our own use.  */
#define GROUP_BITS CHAR_BIT

/* The number of bits available for the user value.  */
#define USER_BITS ((sizeof ((struct option *)0)->val * CHAR_BIT) - GROUP_BITS)
#define USER_MASK ((1 << USER_BITS) - 1)

/* EZ alias for ARGP_ERR_UNKNOWN.  */
#define EBADKEY ARGP_ERR_UNKNOWN

/* Default options.  */

/* When argp is given the --HANG switch, _ARGP_HANG is set and argp will sleep
   for one second intervals, decrementing _ARGP_HANG until it's zero.  Thus
   you can force the program to continue by attaching a debugger and setting
   it to 0 yourself.  */
static volatile int _argp_hang;

#define OPT_PROGNAME	-2
#define OPT_USAGE	-3
#define OPT_HANG	-4

static const struct argp_option argp_default_options[] =
{
  {"help",	  '?',	  	0, 0,  N_("Give this help list"), -1},
  {"usage",	  OPT_USAGE,	0, 0,  N_("Give a short usage message")},
  {"program-name",OPT_PROGNAME, N_("NAME"), OPTION_HIDDEN,
   N_("Set the program name")},
  {"HANG",	  OPT_HANG,    N_("SECS"), OPTION_ARG_OPTIONAL | OPTION_HIDDEN,
   N_("Hang for SECS seconds (default 3600)")},
  {0, 0}
};

static error_t
argp_default_parser (int key, char *arg, struct argp_state *state)
{
  switch (key)
    {
    case '?':
      __argp_state_help (state, state->out_stream, ARGP_HELP_STD_HELP);
      break;
    case OPT_USAGE:
      __argp_state_help (state, state->out_stream,
		       ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
      break;

    case OPT_PROGNAME:		/* Set the program name.  */
#if defined _LIBC || HAVE_DECL_PROGRAM_INVOCATION_NAME
      program_invocation_name = arg;
#endif
      /* [Note that some systems only have PROGRAM_INVOCATION_SHORT_NAME (aka
	 __PROGNAME), in which case, PROGRAM_INVOCATION_NAME is just defined
	 to be that, so we have to be a bit careful here.]  */

      /* Update what we use for messages.  */
      state->name = strrchr (arg, '/');
      if (state->name)
	state->name++;
      else
	state->name = arg;

#if defined _LIBC || HAVE_DECL_PROGRAM_INVOCATION_SHORT_NAME
      program_invocation_short_name = state->name;
#endif

      if ((state->flags & (ARGP_PARSE_ARGV0 | ARGP_NO_ERRS))
	  == ARGP_PARSE_ARGV0)
	/* Update what getopt uses too.  */
	state->argv[0] = arg;

      break;

    case OPT_HANG:
      _argp_hang = atoi (arg ? arg : "3600");
      while (_argp_hang-- > 0)
	__sleep (1);
      break;

    default:
      return EBADKEY;
    }
  return 0;
}

static const struct argp argp_default_argp =
  {argp_default_options, &argp_default_parser, NULL, NULL, NULL, NULL, "libc"};


static const struct argp_option argp_version_options[] =
{
  {"version",	  'V',	  	0, 0,  N_("Print program version"), -1},
  {0, 0}
};

static error_t
argp_version_parser (int key, char *arg, struct argp_state *state)
{
  switch (key)
    {
    case 'V':
      if (argp_program_version_hook)
	(*argp_program_version_hook) (state->out_stream, state);
      else if (argp_program_version)
	fprintf (state->out_stream, "%s\n", argp_program_version);
      else
	__argp_error (state, dgettext (state->root_argp->argp_domain,
				       "(PROGRAM ERROR) No version known!?"));
      if (! (state->flags & ARGP_NO_EXIT))
	exit (0);
      break;
    default:
      return EBADKEY;
    }
  return 0;
}

static const struct argp argp_version_argp =
  {argp_version_options, &argp_version_parser, NULL, NULL, NULL, NULL, "libc"};

/* Returns the offset into the getopt long options array LONG_OPTIONS of a
   long option with called NAME, or -1 if none is found.  Passing NULL as
   NAME will return the number of options.  */
static int
find_long_option (struct option *long_options, const char *name)
{
  struct option *l = long_options;
  while (l->name != NULL)
    if (name != NULL && strcmp (l->name, name) == 0)
      return l - long_options;
    else
      l++;
  if (name == NULL)
    return l - long_options;
  else
    return -1;
}


/* The state of a `group' during parsing.  Each group corresponds to a
   particular argp structure from the tree of such descending from the top
   level argp passed to argp_parse.  */
struct group
{
  /* This group's parsing function.  */
  argp_parser_t parser;

  /* Which argp this group is from.  */
  const struct argp *argp;

  /* Points to the point in SHORT_OPTS corresponding to the end of the short
     options for this group.  We use it to determine from which group a
     particular short options is from.  */
  char *short_end;

  /* The number of non-option args sucessfully handled by this parser.  */
  unsigned args_processed;

  /* This group's parser's parent's group.  */
  struct group *parent;
  unsigned parent_index;	/* And the our position in the parent.   */

  /* These fields are swapped into and out of the state structure when
     calling this group's parser.  */
  void *input, **child_inputs;
  void *hook;
};

/* Call GROUP's parser with KEY and ARG, swapping any group-specific info
   from STATE before calling, and back into state afterwards.  If GROUP has
   no parser, EBADKEY is returned.  */
static error_t
group_parse (struct group *group, struct argp_state *state, int key, char *arg)
{
  if (group->parser)
    {
      error_t err;
      state->hook = group->hook;
      state->input = group->input;
      state->child_inputs = group->child_inputs;
      state->arg_num = group->args_processed;
      err = (*group->parser)(key, arg, state);
      group->hook = state->hook;
      return err;
    }
  else
    return EBADKEY;
}

struct parser
{
  const struct argp *argp;

  /* SHORT_OPTS is the getopt short options string for the union of all the
     groups of options.  */
  char *short_opts;
  /* LONG_OPTS is the array of getop long option structures for the union of
     all the groups of options.  */
  struct option *long_opts;
  /* OPT_DATA is the getopt data used for the re-entrant getopt.  */
  struct _getopt_data opt_data;

  /* States of the various parsing groups.  */
  struct group *groups;
  /* The end of the GROUPS array.  */
  struct group *egroup;
  /* An vector containing storage for the CHILD_INPUTS field in all groups.  */
  void **child_inputs;

  /* True if we think using getopt is still useful; if false, then
     remaining arguments are just passed verbatim with ARGP_KEY_ARG.  This is
     cleared whenever getopt returns KEY_END, but may be set again if the user
     moves the next argument pointer backwards.  */
  int try_getopt;

  /* State block supplied to parsing routines.  */
  struct argp_state state;

  /* Memory used by this parser.  */
  void *storage;
};

/* The next usable entries in the various parser tables being filled in by
   convert_options.  */
struct parser_convert_state
{
  struct parser *parser;
  char *short_end;
  struct option *long_end;
  void **child_inputs_end;
};

/* Converts all options in ARGP (which is put in GROUP) and ancestors
   into getopt options stored in SHORT_OPTS and LONG_OPTS; SHORT_END and
   CVT->LONG_END are the points at which new options are added.  Returns the
   next unused group entry.  CVT holds state used during the conversion.  */
static struct group *
convert_options (const struct argp *argp,
		 struct group *parent, unsigned parent_index,
		 struct group *group, struct parser_convert_state *cvt)
{
  /* REAL is the most recent non-alias value of OPT.  */
  const struct argp_option *real = argp->options;
  const struct argp_child *children = argp->children;

  if (real || argp->parser)
    {
      const struct argp_option *opt;

      if (real)
	for (opt = real; !__option_is_end (opt); opt++)
	  {
	    if (! (opt->flags & OPTION_ALIAS))
	      /* OPT isn't an alias, so we can use values from it.  */
	      real = opt;

	    if (! (real->flags & OPTION_DOC))
	      /* A real option (not just documentation).  */
	      {
		if (__option_is_short (opt))
		  /* OPT can be used as a short option.  */
		  {
		    *cvt->short_end++ = opt->key;
		    if (real->arg)
		      {
			*cvt->short_end++ = ':';
			if (real->flags & OPTION_ARG_OPTIONAL)
			  *cvt->short_end++ = ':';
		      }
		    *cvt->short_end = '\0'; /* keep 0 terminated */
		  }

		if (opt->name
		    && find_long_option (cvt->parser->long_opts, opt->name) < 0)
		  /* OPT can be used as a long option.  */
		  {
		    cvt->long_end->name = opt->name;
		    cvt->long_end->has_arg =
		      (real->arg
		       ? (real->flags & OPTION_ARG_OPTIONAL
			  ? optional_argument
			  : required_argument)
		       : no_argument);
		    cvt->long_end->flag = 0;
		    /* we add a disambiguating code to all the user's
		       values (which is removed before we actually call
		       the function to parse the value); this means that
		       the user loses use of the high 8 bits in all his
		       values (the sign of the lower bits is preserved
		       however)...  */
		    cvt->long_end->val =
		      ((opt->key ? opt->key : real->key) & USER_MASK)
		      + (((group - cvt->parser->groups) + 1) << USER_BITS);

		    /* Keep the LONG_OPTS list terminated.  */
		    (++cvt->long_end)->name = NULL;
		  }
	      }
	    }

      group->parser = argp->parser;
      group->argp = argp;
      group->short_end = cvt->short_end;
      group->args_processed = 0;
      group->parent = parent;
      group->parent_index = parent_index;
      group->input = 0;
      group->hook = 0;
      group->child_inputs = 0;

      if (children)
	/* Assign GROUP's CHILD_INPUTS field some space from
	   CVT->child_inputs_end.*/
	{
	  unsigned num_children = 0;
	  while (children[num_children].argp)
	    num_children++;
	  group->child_inputs = cvt->child_inputs_end;
	  cvt->child_inputs_end += num_children;
	}

      parent = group++;
    }
  else
    parent = 0;

  if (children)
    {
      unsigned index = 0;
      while (children->argp)
	group =
	  convert_options (children++->argp, parent, index++, group, cvt);
    }

  return group;
}

/* Find the merged set of getopt options, with keys appropriately prefixed. */
static void
parser_convert (struct parser *parser, const struct argp *argp, int flags)
{
  struct parser_convert_state cvt;

  cvt.parser = parser;
  cvt.short_end = parser->short_opts;
  cvt.long_end = parser->long_opts;
  cvt.child_inputs_end = parser->child_inputs;

  if (flags & ARGP_IN_ORDER)
    *cvt.short_end++ = '-';
  else if (flags & ARGP_NO_ARGS)
    *cvt.short_end++ = '+';
  *cvt.short_end = '\0';

  cvt.long_end->name = NULL;

  parser->argp = argp;

  if (argp)
    parser->egroup = convert_options (argp, 0, 0, parser->groups, &cvt);
  else
    parser->egroup = parser->groups; /* No parsers at all! */
}

/* Lengths of various parser fields which we will allocated.  */
struct parser_sizes
{
  size_t short_len;		/* Getopt short options string.  */
  size_t long_len;		/* Getopt long options vector.  */
  size_t num_groups;		/* Group structures we allocate.  */
  size_t num_child_inputs;	/* Child input slots.  */
};

/* For ARGP, increments the NUM_GROUPS field in SZS by the total number of
 argp structures descended from it, and the SHORT_LEN & LONG_LEN fields by
 the maximum lengths of the resulting merged getopt short options string and
 long-options array, respectively.  */
static void
calc_sizes (const struct argp *argp,  struct parser_sizes *szs)
{
  const struct argp_child *child = argp->children;
  const struct argp_option *opt = argp->options;

  if (opt || argp->parser)
    {
      szs->num_groups++;
      if (opt)
	{
	  int num_opts = 0;
	  while (!__option_is_end (opt++))
	    num_opts++;
	  szs->short_len += num_opts * 3; /* opt + up to 2 `:'s */
	  szs->long_len += num_opts;
	}
    }

  if (child)
    while (child->argp)
      {
	calc_sizes ((child++)->argp, szs);
	szs->num_child_inputs++;
      }
}

/* Initializes PARSER to parse ARGP in a manner described by FLAGS.  */
static error_t
parser_init (struct parser *parser, const struct argp *argp,
	     int argc, char **argv, int flags, void *input)
{
  error_t err = 0;
  struct group *group;
  struct parser_sizes szs;
  struct _getopt_data opt_data = _GETOPT_DATA_INITIALIZER;

  szs.short_len = (flags & ARGP_NO_ARGS) ? 0 : 1;
  szs.long_len = 0;
  szs.num_groups = 0;
  szs.num_child_inputs = 0;

  if (argp)
    calc_sizes (argp, &szs);

  /* Lengths of the various bits of storage used by PARSER.  */
#define GLEN (szs.num_groups + 1) * sizeof (struct group)
#define CLEN (szs.num_child_inputs * sizeof (void *))
#define LLEN ((szs.long_len + 1) * sizeof (struct option))
#define SLEN (szs.short_len + 1)

  parser->storage = malloc (GLEN + CLEN + LLEN + SLEN);
  if (! parser->storage)
    return ENOMEM;

  parser->groups = parser->storage;
  parser->child_inputs = parser->storage + GLEN;
  parser->long_opts = parser->storage + GLEN + CLEN;
  parser->short_opts = parser->storage + GLEN + CLEN + LLEN;
  parser->opt_data = opt_data;

  memset (parser->child_inputs, 0, szs.num_child_inputs * sizeof (void *));
  parser_convert (parser, argp, flags);

  memset (&parser->state, 0, sizeof (struct argp_state));
  parser->state.root_argp = parser->argp;
  parser->state.argc = argc;
  parser->state.argv = argv;
  parser->state.flags = flags;
  parser->state.err_stream = stderr;
  parser->state.out_stream = stdout;
  parser->state.next = 0;	/* Tell getopt to initialize.  */
  parser->state.pstate = parser;

  parser->try_getopt = 1;

  /* Call each parser for the first time, giving it a chance to propagate
     values to child parsers.  */
  if (parser->groups < parser->egroup)
    parser->groups->input = input;
  for (group = parser->groups;
       group < parser->egroup && (!err || err == EBADKEY);
       group++)
    {
      if (group->parent)
	/* If a child parser, get the initial input value from the parent. */
	group->input = group->parent->child_inputs[group->parent_index];

      if (!group->parser
	  && group->argp->children && group->argp->children->argp)
	/* For the special case where no parsing function is supplied for an
	   argp, propagate its input to its first child, if any (this just
	   makes very simple wrapper argps more convenient).  */
	group->child_inputs[0] = group->input;

      err = group_parse (group, &parser->state, ARGP_KEY_INIT, 0);
    }
  if (err == EBADKEY)
    err = 0;			/* Some parser didn't understand.  */

  if (err)
    return err;

  if (parser->state.flags & ARGP_NO_ERRS)
    {
      parser->opt_data.opterr = 0;
      if (parser->state.flags & ARGP_PARSE_ARGV0)
	/* getopt always skips ARGV[0], so we have to fake it out.  As long
	   as OPTERR is 0, then it shouldn't actually try to access it.  */
	parser->state.argv--, parser->state.argc++;
    }
  else
    parser->opt_data.opterr = 1;	/* Print error messages.  */

  if (parser->state.argv == argv && argv[0])
    /* There's an argv[0]; use it for messages.  */
    {
      char *short_name = strrchr (argv[0], '/');
      parser->state.name = short_name ? short_name + 1 : argv[0];
    }
  else
    parser->state.name = __argp_short_program_name ();

  return 0;
}

/* Free any storage consumed by PARSER (but not PARSER itself).  */
static error_t
parser_finalize (struct parser *parser,
		 error_t err, int arg_ebadkey, int *end_index)
{
  struct group *group;

  if (err == EBADKEY && arg_ebadkey)
    /* Suppress errors generated by unparsed arguments.  */
    err = 0;

  if (! err)
    {
      if (parser->state.next == parser->state.argc)
	/* We successfully parsed all arguments!  Call all the parsers again,
	   just a few more times... */
	{
	  for (group = parser->groups;
	       group < parser->egroup && (!err || err==EBADKEY);
	       group++)
	    if (group->args_processed == 0)
	      err = group_parse (group, &parser->state, ARGP_KEY_NO_ARGS, 0);
	  for (group = parser->egroup - 1;
	       group >= parser->groups && (!err || err==EBADKEY);
	       group--)
	    err = group_parse (group, &parser->state, ARGP_KEY_END, 0);

	  if (err == EBADKEY)
	    err = 0;		/* Some parser didn't understand.  */

	  /* Tell the user that all arguments are parsed.  */
	  if (end_index)
	    *end_index = parser->state.next;
	}
      else if (end_index)
	/* Return any remaining arguments to the user.  */
	*end_index = parser->state.next;
      else
	/* No way to return the remaining arguments, they must be bogus. */
	{
	  if (!(parser->state.flags & ARGP_NO_ERRS)
	      && parser->state.err_stream)
	    fprintf (parser->state.err_stream,
		     dgettext (parser->argp->argp_domain,
			       "%s: Too many arguments\n"),
		     parser->state.name);
	  err = EBADKEY;
	}
    }

  /* Okay, we're all done, with either an error or success; call the parsers
     to indicate which one.  */

  if (err)
    {
      /* Maybe print an error message.  */
      if (err == EBADKEY)
	/* An appropriate message describing what the error was should have
	   been printed earlier.  */
	__argp_state_help (&parser->state, parser->state.err_stream,
			   ARGP_HELP_STD_ERR);

      /* Since we didn't exit, give each parser an error indication.  */
      for (group = parser->groups; group < parser->egroup; group++)
	group_parse (group, &parser->state, ARGP_KEY_ERROR, 0);
    }
  else
    /* Notify parsers of success, and propagate back values from parsers.  */
    {
      /* We pass over the groups in reverse order so that child groups are
	 given a chance to do there processing before passing back a value to
	 the parent.  */
      for (group = parser->egroup - 1
	   ; group >= parser->groups && (!err || err == EBADKEY)
	   ; group--)
	err = group_parse (group, &parser->state, ARGP_KEY_SUCCESS, 0);
      if (err == EBADKEY)
	err = 0;		/* Some parser didn't understand.  */
    }

  /* Call parsers once more, to do any final cleanup.  Errors are ignored.  */
  for (group = parser->egroup - 1; group >= parser->groups; group--)
    group_parse (group, &parser->state, ARGP_KEY_FINI, 0);

  if (err == EBADKEY)
    err = EINVAL;

  free (parser->storage);

  return err;
}

/* Call the user parsers to parse the non-option argument VAL, at the current
   position, returning any error.  The state NEXT pointer is assumed to have
   been adjusted (by getopt) to point after this argument; this function will
   adjust it correctly to reflect however many args actually end up being
   consumed.  */
static error_t
parser_parse_arg (struct parser *parser, char *val)
{
  /* Save the starting value of NEXT, first adjusting it so that the arg
     we're parsing is again the front of the arg vector.  */
  int index = --parser->state.next;
  error_t err = EBADKEY;
  struct group *group;
  int key = 0;			/* Which of ARGP_KEY_ARG[S] we used.  */

  /* Try to parse the argument in each parser.  */
  for (group = parser->groups
       ; group < parser->egroup && err == EBADKEY
       ; group++)
    {
      parser->state.next++;	/* For ARGP_KEY_ARG, consume the arg.  */
      key = ARGP_KEY_ARG;
      err = group_parse (group, &parser->state, key, val);

      if (err == EBADKEY)
	/* This parser doesn't like ARGP_KEY_ARG; try ARGP_KEY_ARGS instead. */
	{
	  parser->state.next--;	/* For ARGP_KEY_ARGS, put back the arg.  */
	  key = ARGP_KEY_ARGS;
	  err = group_parse (group, &parser->state, key, 0);
	}
    }

  if (! err)
    {
      if (key == ARGP_KEY_ARGS)
	/* The default for ARGP_KEY_ARGS is to assume that if NEXT isn't
	   changed by the user, *all* arguments should be considered
	   consumed.  */
	parser->state.next = parser->state.argc;

      if (parser->state.next > index)
	/* Remember that we successfully processed a non-option
	   argument -- but only if the user hasn't gotten tricky and set
	   the clock back.  */
	(--group)->args_processed += (parser->state.next - index);
      else
	/* The user wants to reparse some args, give getopt another try.  */
	parser->try_getopt = 1;
    }

  return err;
}

/* Call the user parsers to parse the option OPT, with argument VAL, at the
   current position, returning any error.  */
static error_t
parser_parse_opt (struct parser *parser, int opt, char *val)
{
  /* The group key encoded in the high bits; 0 for short opts or
     group_number + 1 for long opts.  */
  int group_key = opt >> USER_BITS;
  error_t err = EBADKEY;

  if (group_key == 0)
    /* A short option.  By comparing OPT's position in SHORT_OPTS to the
       various starting positions in each group's SHORT_END field, we can
       determine which group OPT came from.  */
    {
      struct group *group;
      char *short_index = strchr (parser->short_opts, opt);

      if (short_index)
	for (group = parser->groups; group < parser->egroup; group++)
	  if (group->short_end > short_index)
	    {
	      err = group_parse (group, &parser->state, opt,
				 parser->opt_data.optarg);
	      break;
	    }
    }
  else
    /* A long option.  We use shifts instead of masking for extracting
       the user value in order to preserve the sign.  */
    err =
      group_parse (&parser->groups[group_key - 1], &parser->state,
		   (opt << GROUP_BITS) >> GROUP_BITS,
		   parser->opt_data.optarg);

  if (err == EBADKEY)
    /* At least currently, an option not recognized is an error in the
       parser, because we pre-compute which parser is supposed to deal
       with each option.  */
    {
      static const char bad_key_err[] =
	N_("(PROGRAM ERROR) Option should have been recognized!?");
      if (group_key == 0)
	__argp_error (&parser->state, "-%c: %s", opt,
		      dgettext (parser->argp->argp_domain, bad_key_err));
      else
	{
	  struct option *long_opt = parser->long_opts;
	  while (long_opt->val != opt && long_opt->name)
	    long_opt++;
	  __argp_error (&parser->state, "--%s: %s",
			long_opt->name ? long_opt->name : "???",
			dgettext (parser->argp->argp_domain, bad_key_err));
	}
    }

  return err;
}

/* Parse the next argument in PARSER (as indicated by PARSER->state.next).
   Any error from the parsers is returned, and *ARGP_EBADKEY indicates
   whether a value of EBADKEY is due to an unrecognized argument (which is
   generally not fatal).  */
static error_t
parser_parse_next (struct parser *parser, int *arg_ebadkey)
{
  int opt;
  error_t err = 0;

  if (parser->state.quoted && parser->state.next < parser->state.quoted)
    /* The next argument pointer has been moved to before the quoted
       region, so pretend we never saw the quoting `--', and give getopt
       another chance.  If the user hasn't removed it, getopt will just
       process it again.  */
    parser->state.quoted = 0;

  if (parser->try_getopt && !parser->state.quoted)
    /* Give getopt a chance to parse this.  */
    {
      /* Put it back in OPTIND for getopt.  */
      parser->opt_data.optind = parser->state.next;
      /* Distinguish KEY_ERR from a real option.  */
      parser->opt_data.optopt = KEY_END;
      if (parser->state.flags & ARGP_LONG_ONLY)
	opt = _getopt_long_only_r (parser->state.argc, parser->state.argv,
				   parser->short_opts, parser->long_opts, 0,
				   &parser->opt_data);
      else
	opt = _getopt_long_r (parser->state.argc, parser->state.argv,
			      parser->short_opts, parser->long_opts, 0,
			      &parser->opt_data);
      /* And see what getopt did.  */
      parser->state.next = parser->opt_data.optind;

      if (opt == KEY_END)
	/* Getopt says there are no more options, so stop using
	   getopt; we'll continue if necessary on our own.  */
	{
	  parser->try_getopt = 0;
	  if (parser->state.next > 1
	      && strcmp (parser->state.argv[parser->state.next - 1], QUOTE)
		   == 0)
	    /* Not only is this the end of the options, but it's a
	       `quoted' region, which may have args that *look* like
	       options, so we definitely shouldn't try to use getopt past
	       here, whatever happens.  */
	    parser->state.quoted = parser->state.next;
	}
      else if (opt == KEY_ERR && parser->opt_data.optopt != KEY_END)
	/* KEY_ERR can have the same value as a valid user short
	   option, but in the case of a real error, getopt sets OPTOPT
	   to the offending character, which can never be KEY_END.  */
	{
	  *arg_ebadkey = 0;
	  return EBADKEY;
	}
    }
  else
    opt = KEY_END;

  if (opt == KEY_END)
    {
      /* We're past what getopt considers the options.  */
      if (parser->state.next >= parser->state.argc
	  || (parser->state.flags & ARGP_NO_ARGS))
	/* Indicate that we're done.  */
	{
	  *arg_ebadkey = 1;
	  return EBADKEY;
	}
      else
	/* A non-option arg; simulate what getopt might have done.  */
	{
	  opt = KEY_ARG;
	  parser->opt_data.optarg = parser->state.argv[parser->state.next++];
	}
    }

  if (opt == KEY_ARG)
    /* A non-option argument; try each parser in turn.  */
    err = parser_parse_arg (parser, parser->opt_data.optarg);
  else
    err = parser_parse_opt (parser, opt, parser->opt_data.optarg);

  if (err == EBADKEY)
    *arg_ebadkey = (opt == KEY_END || opt == KEY_ARG);

  return err;
}

/* Parse the options strings in ARGC & ARGV according to the argp in ARGP.
   FLAGS is one of the ARGP_ flags above.  If END_INDEX is non-NULL, the
   index in ARGV of the first unparsed option is returned in it.  If an
   unknown option is present, EINVAL is returned; if some parser routine
   returned a non-zero value, it is returned; otherwise 0 is returned.  */
error_t
__argp_parse (const struct argp *argp, int argc, char **argv, unsigned flags,
	      int *end_index, void *input)
{
  error_t err;
  struct parser parser;

  /* If true, then err == EBADKEY is a result of a non-option argument failing
     to be parsed (which in some cases isn't actually an error).  */
  int arg_ebadkey = 0;

  if (! (flags & ARGP_NO_HELP))
    /* Add our own options.  */
    {
      struct argp_child *child = alloca (4 * sizeof (struct argp_child));
      struct argp *top_argp = alloca (sizeof (struct argp));

      /* TOP_ARGP has no options, it just serves to group the user & default
	 argps.  */
      memset (top_argp, 0, sizeof (*top_argp));
      top_argp->children = child;

      memset (child, 0, 4 * sizeof (struct argp_child));

      if (argp)
	(child++)->argp = argp;
      (child++)->argp = &argp_default_argp;
      if (argp_program_version || argp_program_version_hook)
	(child++)->argp = &argp_version_argp;
      child->argp = 0;

      argp = top_argp;
    }

  /* Construct a parser for these arguments.  */
  err = parser_init (&parser, argp, argc, argv, flags, input);

  if (! err)
    /* Parse! */
    {
      while (! err)
	err = parser_parse_next (&parser, &arg_ebadkey);
      err = parser_finalize (&parser, err, arg_ebadkey, end_index);
    }

  return err;
}
#ifdef weak_alias
weak_alias (__argp_parse, argp_parse)
#endif

/* Return the input field for ARGP in the parser corresponding to STATE; used
   by the help routines.  */
void *
__argp_input (const struct argp *argp, const struct argp_state *state)
{
  if (state)
    {
      struct group *group;
      struct parser *parser = state->pstate;

      for (group = parser->groups; group < parser->egroup; group++)
	if (group->argp == argp)
	  return group->input;
    }

  return 0;
}
#ifdef weak_alias
weak_alias (__argp_input, _argp_input)
#endif