lib/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library and is also part of gnulib.
   4    Patches to this file should be submitted to both projects.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19 \f
  20 #ifndef _LIBC
  21 # ifdef HAVE_CONFIG_H
  22 #  include <config.h>
  23 # endif
  24 #endif
  25
  26 #include "getopt.h"
  27 #include "getopt_int.h"
  28
  29 int
  30 getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
  31              const struct option *long_options, int *opt_index)
  32 {
  33   return _getopt_internal (argc, (char **) argv, options, long_options,
  34                            opt_index, 0, 0);
  35 }
  36
  37 int
  38 _getopt_long_r (int argc, char **argv, const char *options,
  39                 const struct option *long_options, int *opt_index,
  40                 struct _getopt_data *d)
  41 {
  42   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  43                              0, d, 0);
  44 }
  45
  46 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  47    If an option that starts with '-' (not '--') doesn't match a long option,
  48    but does match a short option, it is parsed as a short option
  49    instead.  */
  50
  51 int
  52 getopt_long_only (int argc, char *__getopt_argv_const *argv,
  53                   const char *options,
  54                   const struct option *long_options, int *opt_index)
  55 {
  56   return _getopt_internal (argc, (char **) argv, options, long_options,
  57                            opt_index, 1, 0);
  58 }
  59
  60 int
  61 _getopt_long_only_r (int argc, char **argv, const char *options,
  62                      const struct option *long_options, int *opt_index,
  63                      struct _getopt_data *d)
  64 {
  65   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  66                              1, d, 0);
  67 }
  68
  69 \f
  70 #ifdef TEST
  71
  72 #include <stdio.h>
  73 #include <stdlib.h>
  74
  75 int
  76 main (int argc, char **argv)
  77 {
  78   int c;
  79   int digit_optind = 0;
  80
  81   while (1)
  82     {
  83       int this_option_optind = optind ? optind : 1;
  84       int option_index = 0;
  85       static const struct option long_options[] =
  86       {
  87         {"add", 1, 0, 0},
  88         {"append", 0, 0, 0},
  89         {"delete", 1, 0, 0},
  90         {"verbose", 0, 0, 0},
  91         {"create", 0, 0, 0},
  92         {"file", 1, 0, 0},
  93         {0, 0, 0, 0}
  94       };
  95
  96       c = getopt_long (argc, argv, "abc:d:0123456789",
  97                        long_options, &option_index);
  98       if (c == -1)
  99         break;
 100
 101       switch (c)
 102         {
 103         case 0:
 104           printf ("option %s", long_options[option_index].name);
 105           if (optarg)
 106             printf (" with arg %s", optarg);
 107           printf ("\n");
 108           break;
 109
 110         case '0':
 111         case '1':
 112         case '2':
 113         case '3':
 114         case '4':
 115         case '5':
 116         case '6':
 117         case '7':
 118         case '8':
 119         case '9':
 120           if (digit_optind != 0 && digit_optind != this_option_optind)
 121             printf ("digits occur in two different argv-elements.\n");
 122           digit_optind = this_option_optind;
 123           printf ("option %c\n", c);
 124           break;
 125
 126         case 'a':
 127           printf ("option a\n");
 128           break;
 129
 130         case 'b':
 131           printf ("option b\n");
 132           break;
 133
 134         case 'c':
 135           printf ("option c with value '%s'\n", optarg);
 136           break;
 137
 138         case 'd':
 139           printf ("option d with value '%s'\n", optarg);
 140           break;
 141
 142         case '?':
 143           break;
 144
 145         default:
 146           printf ("?? getopt returned character code 0%o ??\n", c);
 147         }
 148     }
 149
 150   if (optind < argc)
 151     {
 152       printf ("non-option ARGV-elements: ");
 153       while (optind < argc)
 154         printf ("%s ", argv[optind++]);
 155       printf ("\n");
 156     }
 157
 158   exit (0);
 159 }
 160
 161 #endif /* TEST */