posix/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18 \f
  19 #ifndef _LIBC
  20 #include "config.h"
  21 #endif
  22
  23 #include "getopt.h"
  24 #include "getopt_int.h"
  25
  26 int
  27 getopt_long (int argc, char *__getopt_argv_const *argv, const char *options,
  28              const struct option *long_options, int *opt_index)
  29 {
  30   return _getopt_internal (argc, (char **) argv, options, long_options,
  31                            opt_index, 0, 0);
  32 }
  33
  34 int
  35 _getopt_long_r (int argc, char **argv, const char *options,
  36                 const struct option *long_options, int *opt_index,
  37                 struct _getopt_data *d)
  38 {
  39   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  40                              0, d, 0);
  41 }
  42
  43 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  44    If an option that starts with '-' (not '--') doesn't match a long option,
  45    but does match a short option, it is parsed as a short option
  46    instead.  */
  47
  48 int
  49 getopt_long_only (int argc, char *__getopt_argv_const *argv,
  50                   const char *options,
  51                   const struct option *long_options, int *opt_index)
  52 {
  53   return _getopt_internal (argc, (char **) argv, options, long_options,
  54                            opt_index, 1, 0);
  55 }
  56
  57 int
  58 _getopt_long_only_r (int argc, char **argv, const char *options,
  59                      const struct option *long_options, int *opt_index,
  60                      struct _getopt_data *d)
  61 {
  62   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  63                              1, d, 0);
  64 }
  65
  66 \f
  67 #ifdef TEST
  68
  69 #include <stdio.h>
  70 #include <stdlib.h>
  71
  72 int
  73 main (int argc, char **argv)
  74 {
  75   int c;
  76   int digit_optind = 0;
  77
  78   while (1)
  79     {
  80       int this_option_optind = optind ? optind : 1;
  81       int option_index = 0;
  82       static const struct option long_options[] =
  83       {
  84         {"add", 1, 0, 0},
  85         {"append", 0, 0, 0},
  86         {"delete", 1, 0, 0},
  87         {"verbose", 0, 0, 0},
  88         {"create", 0, 0, 0},
  89         {"file", 1, 0, 0},
  90         {0, 0, 0, 0}
  91       };
  92
  93       c = getopt_long (argc, argv, "abc:d:0123456789",
  94                        long_options, &option_index);
  95       if (c == -1)
  96         break;
  97
  98       switch (c)
  99         {
 100         case 0:
 101           printf ("option %s", long_options[option_index].name);
 102           if (optarg)
 103             printf (" with arg %s", optarg);
 104           printf ("\n");
 105           break;
 106
 107         case '0':
 108         case '1':
 109         case '2':
 110         case '3':
 111         case '4':
 112         case '5':
 113         case '6':
 114         case '7':
 115         case '8':
 116         case '9':
 117           if (digit_optind != 0 && digit_optind != this_option_optind)
 118             printf ("digits occur in two different argv-elements.\n");
 119           digit_optind = this_option_optind;
 120           printf ("option %c\n", c);
 121           break;
 122
 123         case 'a':
 124           printf ("option a\n");
 125           break;
 126
 127         case 'b':
 128           printf ("option b\n");
 129           break;
 130
 131         case 'c':
 132           printf ("option c with value '%s'\n", optarg);
 133           break;
 134
 135         case 'd':
 136           printf ("option d with value '%s'\n", optarg);
 137           break;
 138
 139         case '?':
 140           break;
 141
 142         default:
 143           printf ("?? getopt returned character code 0%o ??\n", c);
 144         }
 145     }
 146
 147   if (optind < argc)
 148     {
 149       printf ("non-option ARGV-elements: ");
 150       while (optind < argc)
 151         printf ("%s ", argv[optind++]);
 152       printf ("\n");
 153     }
 154
 155   exit (0);
 156 }
 157
 158 #endif /* TEST */