gnu/usr.bin/grep/getopt1.c

   1 /* $DragonFly: src/gnu/usr.bin/grep/getopt1.c,v 1.2 2008/06/05 18:01:49 swildner Exp $ */
   2
   3 /* getopt_long and getopt_long_only entry points for GNU getopt.
   4    Copyright (C) 1987,88,89,90,91,92,93,94,96,97,98
   5      Free Software Foundation, Inc.
   6    NOTE: The canonical source of this file is maintained with the GNU C Library.
   7    Bugs can be reported to bug-glibc@gnu.org.
   8
   9    This program is free software; you can redistribute it and/or modify it
  10    under the terms of the GNU General Public License as published by the
  11    Free Software Foundation; either version 2, or (at your option) any
  12    later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software Foundation,
  21    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22 \f
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #else
  26 #if !defined __STDC__ || !__STDC__
  27 /* This is a separate conditional since some stdc systems
  28    reject `defined (const)'.  */
  29 #ifndef const
  30 #define const
  31 #endif
  32 #endif
  33 #endif
  34
  35 #include "getopt.h"
  36
  37 #include <stdio.h>
  38
  39 /* Comment out all this code if we are using the GNU C Library, and are not
  40    actually compiling the library itself.  This code is part of the GNU C
  41    Library, but also included in many other GNU distributions.  Compiling
  42    and linking in this code is a waste when using the GNU C library
  43    (especially if it is a shared library).  Rather than having every GNU
  44    program understand `configure --with-gnu-libc' and omit the object files,
  45    it is simpler to just do this in the source for each such file.  */
  46
  47 #define GETOPT_INTERFACE_VERSION 2
  48 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  49 #include <gnu-versions.h>
  50 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  51 #define ELIDE_CODE
  52 #endif
  53 #endif
  54
  55 #ifndef ELIDE_CODE
  56
  57
  58 /* This needs to come after some library #include
  59    to get __GNU_LIBRARY__ defined.  */
  60 #ifdef __GNU_LIBRARY__
  61 #include <stdlib.h>
  62 #endif
  63
  64 int
  65 getopt_long (argc, argv, options, long_options, opt_index)
  66      int argc;
  67      char *const *argv;
  68      const char *options;
  69      const struct option *long_options;
  70      int *opt_index;
  71 {
  72   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  73 }
  74
  75 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  76    If an option that starts with '-' (not '--') doesn't match a long option,
  77    but does match a short option, it is parsed as a short option
  78    instead.  */
  79
  80 int
  81 getopt_long_only (argc, argv, options, long_options, opt_index)
  82      int argc;
  83      char *const *argv;
  84      const char *options;
  85      const struct option *long_options;
  86      int *opt_index;
  87 {
  88   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  89 }
  90
  91
  92 #endif  /* Not ELIDE_CODE.  */
  93 \f
  94 #ifdef TEST
  95
  96 #include <stdio.h>
  97
  98 int
  99 main (argc, argv)
 100      int argc;
 101      char **argv;
 102 {
 103   int c;
 104   int digit_optind = 0;
 105
 106   while (1)
 107     {
 108       int this_option_optind = optind ? optind : 1;
 109       int option_index = 0;
 110       static struct option long_options[] =
 111       {
 112         {"add", 1, 0, 0},
 113         {"append", 0, 0, 0},
 114         {"delete", 1, 0, 0},
 115         {"verbose", 0, 0, 0},
 116         {"create", 0, 0, 0},
 117         {"file", 1, 0, 0},
 118         {0, 0, 0, 0}
 119       };
 120
 121       c = getopt_long (argc, argv, "abc:d:0123456789",
 122                        long_options, &option_index);
 123       if (c == -1)
 124         break;
 125
 126       switch (c)
 127         {
 128         case 0:
 129           printf ("option %s", long_options[option_index].name);
 130           if (optarg)
 131             printf (" with arg %s", optarg);
 132           printf ("\n");
 133           break;
 134
 135         case '0':
 136         case '1':
 137         case '2':
 138         case '3':
 139         case '4':
 140         case '5':
 141         case '6':
 142         case '7':
 143         case '8':
 144         case '9':
 145           if (digit_optind != 0 && digit_optind != this_option_optind)
 146             printf ("digits occur in two different argv-elements.\n");
 147           digit_optind = this_option_optind;
 148           printf ("option %c\n", c);
 149           break;
 150
 151         case 'a':
 152           printf ("option a\n");
 153           break;
 154
 155         case 'b':
 156           printf ("option b\n");
 157           break;
 158
 159         case 'c':
 160           printf ("option c with value `%s'\n", optarg);
 161           break;
 162
 163         case 'd':
 164           printf ("option d with value `%s'\n", optarg);
 165           break;
 166
 167         case '?':
 168           break;
 169
 170         default:
 171           printf ("?? getopt returned character code 0%o ??\n", c);
 172         }
 173     }
 174
 175   if (optind < argc)
 176     {
 177       printf ("non-option ARGV-elements: ");
 178       while (optind < argc)
 179         printf ("%s ", argv[optind++]);
 180       printf ("\n");
 181     }
 182
 183   exit (0);
 184 }
 185
 186 #endif /* TEST */