lib/getopt1.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 /* getopt_long and getopt_long_only entry points for GNU getopt.
   4    Copyright (C) 1987-2023 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library and is also part of gnulib.
   6    Patches to this file should be submitted to both projects.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 2.1 of the License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Lesser General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public
  19    License along with the GNU C Library; if not, see
  20    <https://www.gnu.org/licenses/>.  */
  21 \f
  22 #ifndef _LIBC
  23 # ifdef HAVE_CONFIG_H
  24 #  include <config.h>
  25 # endif
  26 #endif
  27
  28 #include "getopt.h"
  29 #include "getopt_int.h"
  30
  31 int
  32 getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
  33              const struct option *long_options, int *opt_index)
  34 {
  35   return _getopt_internal (argc, (char **) argv, options, long_options,
  36                            opt_index, 0, 0);
  37 }
  38
  39 int
  40 _getopt_long_r (int argc, char **argv, const char *options,
  41                 const struct option *long_options, int *opt_index,
  42                 struct _getopt_data *d)
  43 {
  44   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  45                              0, d, 0);
  46 }
  47
  48 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  49    If an option that starts with '-' (not '--') doesn't match a long option,
  50    but does match a short option, it is parsed as a short option
  51    instead.  */
  52
  53 int
  54 getopt_long_only (int argc, char *__getopt_argv_const *argv,
  55                   const char *options,
  56                   const struct option *long_options, int *opt_index)
  57 {
  58   return _getopt_internal (argc, (char **) argv, options, long_options,
  59                            opt_index, 1, 0);
  60 }
  61
  62 int
  63 _getopt_long_only_r (int argc, char **argv, const char *options,
  64                      const struct option *long_options, int *opt_index,
  65                      struct _getopt_data *d)
  66 {
  67   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  68                              1, d, 0);
  69 }
  70
  71 \f
  72 #ifdef TEST
  73
  74 #include <stdio.h>
  75 #include <stdlib.h>
  76
  77 int
  78 main (int argc, char **argv)
  79 {
  80   int c;
  81   int digit_optind = 0;
  82
  83   while (1)
  84     {
  85       int this_option_optind = optind ? optind : 1;
  86       int option_index = 0;
  87       static const struct option long_options[] =
  88       {
  89         {"add", 1, 0, 0},
  90         {"append", 0, 0, 0},
  91         {"delete", 1, 0, 0},
  92         {"verbose", 0, 0, 0},
  93         {"create", 0, 0, 0},
  94         {"file", 1, 0, 0},
  95         {0, 0, 0, 0}
  96       };
  97
  98       c = getopt_long (argc, argv, "abc:d:0123456789",
  99                        long_options, &option_index);
 100       if (c == -1)
 101         break;
 102
 103       switch (c)
 104         {
 105         case 0:
 106           printf ("option %s", long_options[option_index].name);
 107           if (optarg)
 108             printf (" with arg %s", optarg);
 109           printf ("\n");
 110           break;
 111
 112         case '0':
 113         case '1':
 114         case '2':
 115         case '3':
 116         case '4':
 117         case '5':
 118         case '6':
 119         case '7':
 120         case '8':
 121         case '9':
 122           if (digit_optind != 0 && digit_optind != this_option_optind)
 123             printf ("digits occur in two different argv-elements.\n");
 124           digit_optind = this_option_optind;
 125           printf ("option %c\n", c);
 126           break;
 127
 128         case 'a':
 129           printf ("option a\n");
 130           break;
 131
 132         case 'b':
 133           printf ("option b\n");
 134           break;
 135
 136         case 'c':
 137           printf ("option c with value '%s'\n", optarg);
 138           break;
 139
 140         case 'd':
 141           printf ("option d with value '%s'\n", optarg);
 142           break;
 143
 144         case '?':
 145           break;
 146
 147         default:
 148           printf ("?? getopt returned character code 0%o ??\n", c);
 149         }
 150     }
 151
 152   if (optind < argc)
 153     {
 154       printf ("non-option ARGV-elements: ");
 155       while (optind < argc)
 156         printf ("%s ", argv[optind++]);
 157       printf ("\n");
 158     }
 159
 160   exit (0);
 161 }
 162
 163 #endif /* TEST */