contrib/cvs/lib/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
   3         Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify it
   6    under the terms of the GNU General Public License as published by the
   7    Free Software Foundation; either version 2, or (at your option) any
   8    later version.
   9
  10    This program 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
  13    GNU General Public License for more details.  */
  14 \f
  15 #ifdef HAVE_CONFIG_H
  16 #if defined (emacs) || defined (CONFIG_BROKETS)
  17 /* We use <config.h> instead of "config.h" so that a compilation
  18    using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
  19    (which it would do because it found this file in $srcdir).  */
  20 #include <config.h>
  21 #else
  22 #include "config.h"
  23 #endif
  24 #endif
  25
  26 #include "getopt.h"
  27
  28 #ifndef __STDC__
  29 /* This is a separate conditional since some stdc systems
  30    reject `defined (const)'.  */
  31 #ifndef const
  32 #define const
  33 #endif
  34 #endif
  35
  36 #include <stdio.h>
  37
  38 /* Comment out all this code if we are using the GNU C Library, and are not
  39    actually compiling the library itself.  This code is part of the GNU C
  40    Library, but also included in many other GNU distributions.  Compiling
  41    and linking in this code is a waste when using the GNU C library
  42    (especially if it is a shared library).  Rather than having every GNU
  43    program understand `configure --with-gnu-libc' and omit the object files,
  44    it is simpler to just do this in the source for each such file.  */
  45
  46 #if defined (_LIBC) || !defined (__GNU_LIBRARY__)
  47
  48
  49 /* This needs to come after some library #include
  50    to get __GNU_LIBRARY__ defined.  */
  51 #ifdef __GNU_LIBRARY__
  52 #include <stdlib.h>
  53 #else
  54 char *getenv ();
  55 #endif
  56
  57 #ifndef NULL
  58 #define NULL 0
  59 #endif
  60
  61 int
  62 getopt_long (argc, argv, options, long_options, opt_index)
  63      int argc;
  64      char *const *argv;
  65      const char *options;
  66      const struct option *long_options;
  67      int *opt_index;
  68 {
  69   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  70 }
  71
  72 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  73    If an option that starts with '-' (not '--') doesn't match a long option,
  74    but does match a short option, it is parsed as a short option
  75    instead.  */
  76
  77 int
  78 getopt_long_only (argc, argv, options, long_options, opt_index)
  79      int argc;
  80      char *const *argv;
  81      const char *options;
  82      const struct option *long_options;
  83      int *opt_index;
  84 {
  85   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  86 }
  87
  88
  89 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
  90 \f
  91 #ifdef TEST
  92
  93 #include <stdio.h>
  94
  95 int
  96 main (argc, argv)
  97      int argc;
  98      char **argv;
  99 {
 100   int c;
 101   int digit_optind = 0;
 102
 103   while (1)
 104     {
 105       int this_option_optind = optind ? optind : 1;
 106       int option_index = 0;
 107       static struct option long_options[] =
 108       {
 109         {"add", 1, 0, 0},
 110         {"append", 0, 0, 0},
 111         {"delete", 1, 0, 0},
 112         {"verbose", 0, 0, 0},
 113         {"create", 0, 0, 0},
 114         {"file", 1, 0, 0},
 115         {0, 0, 0, 0}
 116       };
 117
 118       c = getopt_long (argc, argv, "abc:d:0123456789",
 119                        long_options, &option_index);
 120       if (c == EOF)
 121         break;
 122
 123       switch (c)
 124         {
 125         case 0:
 126           printf ("option %s", long_options[option_index].name);
 127           if (optarg)
 128             printf (" with arg %s", optarg);
 129           printf ("\n");
 130           break;
 131
 132         case '0':
 133         case '1':
 134         case '2':
 135         case '3':
 136         case '4':
 137         case '5':
 138         case '6':
 139         case '7':
 140         case '8':
 141         case '9':
 142           if (digit_optind != 0 && digit_optind != this_option_optind)
 143             printf ("digits occur in two different argv-elements.\n");
 144           digit_optind = this_option_optind;
 145           printf ("option %c\n", c);
 146           break;
 147
 148         case 'a':
 149           printf ("option a\n");
 150           break;
 151
 152         case 'b':
 153           printf ("option b\n");
 154           break;
 155
 156         case 'c':
 157           printf ("option c with value `%s'\n", optarg);
 158           break;
 159
 160         case 'd':
 161           printf ("option d with value `%s'\n", optarg);
 162           break;
 163
 164         case '?':
 165           break;
 166
 167         default:
 168           printf ("?? getopt returned character code 0%o ??\n", c);
 169         }
 170     }
 171
 172   if (optind < argc)
 173     {
 174       printf ("non-option ARGV-elements: ");
 175       while (optind < argc)
 176         printf ("%s ", argv[optind++]);
 177       printf ("\n");
 178     }
 179
 180   exit (0);
 181 }
 182
 183 #endif /* TEST */