examples/getopt/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98
   3      Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20 \f
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include "getopt.h"
  26
  27 #if !defined __STDC__ || !__STDC__
  28 /* This is a separate conditional since some stdc systems
  29    reject `defined (const)'.  */
  30 #ifndef const
  31 #define const
  32 #endif
  33 #endif
  34
  35 #include <stdio.h>
  36
  37 /* Comment out all this code if we are using the GNU C Library, and are not
  38    actually compiling the library itself.  This code is part of the GNU C
  39    Library, but also included in many other GNU distributions.  Compiling
  40    and linking in this code is a waste when using the GNU C library
  41    (especially if it is a shared library).  Rather than having every GNU
  42    program understand `configure --with-gnu-libc' and omit the object files,
  43    it is simpler to just do this in the source for each such file.  */
  44
  45 #define GETOPT_INTERFACE_VERSION 2
  46 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  47 #include <gnu-versions.h>
  48 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  49 #define ELIDE_CODE
  50 #endif
  51 #endif
  52
  53 #ifndef ELIDE_CODE
  54
  55
  56 /* This needs to come after some library #include
  57    to get __GNU_LIBRARY__ defined.  */
  58 #ifdef __GNU_LIBRARY__
  59 #include <stdlib.h>
  60 #endif
  61
  62 #ifndef NULL
  63 #define NULL 0
  64 #endif
  65
  66 int
  67 getopt_long (argc, argv, options, long_options, opt_index)
  68      int argc;
  69      char *const *argv;
  70      const char *options;
  71      const struct option *long_options;
  72      int *opt_index;
  73 {
  74   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  75 }
  76
  77 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  78    If an option that starts with '-' (not '--') doesn't match a long option,
  79    but does match a short option, it is parsed as a short option
  80    instead.  */
  81
  82 int
  83 getopt_long_only (argc, argv, options, long_options, opt_index)
  84      int argc;
  85      char *const *argv;
  86      const char *options;
  87      const struct option *long_options;
  88      int *opt_index;
  89 {
  90   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  91 }
  92
  93
  94 #endif  /* Not ELIDE_CODE.  */
  95 \f
  96 #ifdef TEST
  97
  98 #include <stdio.h>
  99
 100 int
 101 main (argc, argv)
 102      int argc;
 103      char **argv;
 104 {
 105   int c;
 106   int digit_optind = 0;
 107
 108   while (1)
 109     {
 110       int this_option_optind = optind ? optind : 1;
 111       int option_index = 0;
 112       static struct option long_options[] =
 113       {
 114         {"add", 1, 0, 0},
 115         {"append", 0, 0, 0},
 116         {"delete", 1, 0, 0},
 117         {"verbose", 0, 0, 0},
 118         {"create", 0, 0, 0},
 119         {"file", 1, 0, 0},
 120         {0, 0, 0, 0}
 121       };
 122
 123       c = getopt_long (argc, argv, "abc:d:0123456789",
 124                        long_options, &option_index);
 125       if (c == -1)
 126         break;
 127
 128       switch (c)
 129         {
 130         case 0:
 131           printf ("option %s", long_options[option_index].name);
 132           if (optarg)
 133             printf (" with arg %s", optarg);
 134           printf ("\n");
 135           break;
 136
 137         case '0':
 138         case '1':
 139         case '2':
 140         case '3':
 141         case '4':
 142         case '5':
 143         case '6':
 144         case '7':
 145         case '8':
 146         case '9':
 147           if (digit_optind != 0 && digit_optind != this_option_optind)
 148             printf ("digits occur in two different argv-elements.\n");
 149           digit_optind = this_option_optind;
 150           printf ("option %c\n", c);
 151           break;
 152
 153         case 'a':
 154           printf ("option a\n");
 155           break;
 156
 157         case 'b':
 158           printf ("option b\n");
 159           break;
 160
 161         case 'c':
 162           printf ("option c with value `%s'\n", optarg);
 163           break;
 164
 165         case 'd':
 166           printf ("option d with value `%s'\n", optarg);
 167           break;
 168
 169         case '?':
 170           break;
 171
 172         default:
 173           printf ("?? getopt returned character code 0%o ??\n", c);
 174         }
 175     }
 176
 177   if (optind < argc)
 178     {
 179       printf ("non-option ARGV-elements: ");
 180       while (optind < argc)
 181         printf ("%s ", argv[optind++]);
 182       printf ("\n");
 183     }
 184
 185   exit (0);
 186 }
 187
 188 #endif /* TEST */