posix/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 #ifdef _LIBC
  26 # include <getopt.h>
  27 #else
  28 # include "getopt.h"
  29 #endif
  30
  31 #if !defined __STDC__ || !__STDC__
  32 /* This is a separate conditional since some stdc systems
  33    reject `defined (const)'.  */
  34 #ifndef const
  35 #define const
  36 #endif
  37 #endif
  38
  39 #include <stdio.h>
  40
  41 /* Comment out all this code if we are using the GNU C Library, and are not
  42    actually compiling the library itself.  This code is part of the GNU C
  43    Library, but also included in many other GNU distributions.  Compiling
  44    and linking in this code is a waste when using the GNU C library
  45    (especially if it is a shared library).  Rather than having every GNU
  46    program understand `configure --with-gnu-libc' and omit the object files,
  47    it is simpler to just do this in the source for each such file.  */
  48
  49 #define GETOPT_INTERFACE_VERSION 2
  50 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  51 #include <gnu-versions.h>
  52 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  53 #define ELIDE_CODE
  54 #endif
  55 #endif
  56
  57 #ifndef ELIDE_CODE
  58
  59
  60 /* This needs to come after some library #include
  61    to get __GNU_LIBRARY__ defined.  */
  62 #ifdef __GNU_LIBRARY__
  63 #include <stdlib.h>
  64 #endif
  65
  66 #ifndef NULL
  67 #define NULL 0
  68 #endif
  69
  70 int
  71 getopt_long (argc, argv, options, long_options, opt_index)
  72      int argc;
  73      char *const *argv;
  74      const char *options;
  75      const struct option *long_options;
  76      int *opt_index;
  77 {
  78   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  79 }
  80
  81 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  82    If an option that starts with '-' (not '--') doesn't match a long option,
  83    but does match a short option, it is parsed as a short option
  84    instead.  */
  85
  86 int
  87 getopt_long_only (argc, argv, options, long_options, opt_index)
  88      int argc;
  89      char *const *argv;
  90      const char *options;
  91      const struct option *long_options;
  92      int *opt_index;
  93 {
  94   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  95 }
  96
  97 # ifdef _LIBC
  98 libc_hidden_def (getopt_long)
  99 libc_hidden_def (getopt_long_only)
 100 # endif
 101
 102 #endif  /* Not ELIDE_CODE.  */
 103 \f
 104 #ifdef TEST
 105
 106 #include <stdio.h>
 107
 108 int
 109 main (argc, argv)
 110      int argc;
 111      char **argv;
 112 {
 113   int c;
 114   int digit_optind = 0;
 115
 116   while (1)
 117     {
 118       int this_option_optind = optind ? optind : 1;
 119       int option_index = 0;
 120       static struct option long_options[] =
 121       {
 122         {"add", 1, 0, 0},
 123         {"append", 0, 0, 0},
 124         {"delete", 1, 0, 0},
 125         {"verbose", 0, 0, 0},
 126         {"create", 0, 0, 0},
 127         {"file", 1, 0, 0},
 128         {0, 0, 0, 0}
 129       };
 130
 131       c = getopt_long (argc, argv, "abc:d:0123456789",
 132                        long_options, &option_index);
 133       if (c == -1)
 134         break;
 135
 136       switch (c)
 137         {
 138         case 0:
 139           printf ("option %s", long_options[option_index].name);
 140           if (optarg)
 141             printf (" with arg %s", optarg);
 142           printf ("\n");
 143           break;
 144
 145         case '0':
 146         case '1':
 147         case '2':
 148         case '3':
 149         case '4':
 150         case '5':
 151         case '6':
 152         case '7':
 153         case '8':
 154         case '9':
 155           if (digit_optind != 0 && digit_optind != this_option_optind)
 156             printf ("digits occur in two different argv-elements.\n");
 157           digit_optind = this_option_optind;
 158           printf ("option %c\n", c);
 159           break;
 160
 161         case 'a':
 162           printf ("option a\n");
 163           break;
 164
 165         case 'b':
 166           printf ("option b\n");
 167           break;
 168
 169         case 'c':
 170           printf ("option c with value `%s'\n", optarg);
 171           break;
 172
 173         case 'd':
 174           printf ("option d with value `%s'\n", optarg);
 175           break;
 176
 177         case '?':
 178           break;
 179
 180         default:
 181           printf ("?? getopt returned character code 0%o ??\n", c);
 182         }
 183     }
 184
 185   if (optind < argc)
 186     {
 187       printf ("non-option ARGV-elements: ");
 188       while (optind < argc)
 189         printf ("%s ", argv[optind++]);
 190       printf ("\n");
 191     }
 192
 193   exit (0);
 194 }
 195
 196 #endif /* TEST */