posix/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987, 88, 89, 90, 91, 92, 1993, 1994
   3         Free Software Foundation, Inc.
   4
   5 This file is part of the GNU C Library.  Its master source is NOT part of
   6 the C library, however.  The master source lives in /gd/gnu/lib.
   7
   8 The GNU C Library is free software; you can redistribute it and/or
   9 modify it under the terms of the GNU Library General Public License as
  10 published by the Free Software Foundation; either version 2 of the
  11 License, or (at your option) any later version.
  12
  13 The GNU C Library is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 Library General Public License for more details.
  17
  18 You should have received a copy of the GNU Library General Public
  19 License along with the GNU C Library; see the file COPYING.LIB.  If
  20 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  21 Cambridge, MA 02139, USA.  */
  22 \f
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include "getopt.h"
  28
  29 #if !defined (__STDC__) || !__STDC__
  30 /* This is a separate conditional since some stdc systems
  31    reject `defined (const)'.  */
  32 #ifndef const
  33 #define const
  34 #endif
  35 #endif
  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 #if defined (_LIBC) || !defined (__GNU_LIBRARY__)
  48
  49
  50 /* This needs to come after some library #include
  51    to get __GNU_LIBRARY__ defined.  */
  52 #ifdef __GNU_LIBRARY__
  53 #include <stdlib.h>
  54 #else
  55 char *getenv ();
  56 #endif
  57
  58 #ifndef NULL
  59 #define NULL 0
  60 #endif
  61
  62 int
  63 getopt_long (argc, argv, options, long_options, opt_index)
  64      int argc;
  65      char *const *argv;
  66      const char *options;
  67      const struct option *long_options;
  68      int *opt_index;
  69 {
  70   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  71 }
  72
  73 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  74    If an option that starts with '-' (not '--') doesn't match a long option,
  75    but does match a short option, it is parsed as a short option
  76    instead.  */
  77
  78 int
  79 getopt_long_only (argc, argv, options, long_options, opt_index)
  80      int argc;
  81      char *const *argv;
  82      const char *options;
  83      const struct option *long_options;
  84      int *opt_index;
  85 {
  86   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  87 }
  88
  89
  90 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
  91 \f
  92 #ifdef TEST
  93
  94 #include <stdio.h>
  95
  96 int
  97 main (argc, argv)
  98      int argc;
  99      char **argv;
 100 {
 101   int c;
 102   int digit_optind = 0;
 103
 104   while (1)
 105     {
 106       int this_option_optind = optind ? optind : 1;
 107       int option_index = 0;
 108       static struct option long_options[] =
 109       {
 110         {"add", 1, 0, 0},
 111         {"append", 0, 0, 0},
 112         {"delete", 1, 0, 0},
 113         {"verbose", 0, 0, 0},
 114         {"create", 0, 0, 0},
 115         {"file", 1, 0, 0},
 116         {0, 0, 0, 0}
 117       };
 118
 119       c = getopt_long (argc, argv, "abc:d:0123456789",
 120                        long_options, &option_index);
 121       if (c == EOF)
 122         break;
 123
 124       switch (c)
 125         {
 126         case 0:
 127           printf ("option %s", long_options[option_index].name);
 128           if (optarg)
 129             printf (" with arg %s", optarg);
 130           printf ("\n");
 131           break;
 132
 133         case '0':
 134         case '1':
 135         case '2':
 136         case '3':
 137         case '4':
 138         case '5':
 139         case '6':
 140         case '7':
 141         case '8':
 142         case '9':
 143           if (digit_optind != 0 && digit_optind != this_option_optind)
 144             printf ("digits occur in two different argv-elements.\n");
 145           digit_optind = this_option_optind;
 146           printf ("option %c\n", c);
 147           break;
 148
 149         case 'a':
 150           printf ("option a\n");
 151           break;
 152
 153         case 'b':
 154           printf ("option b\n");
 155           break;
 156
 157         case 'c':
 158           printf ("option c with value `%s'\n", optarg);
 159           break;
 160
 161         case 'd':
 162           printf ("option d with value `%s'\n", optarg);
 163           break;
 164
 165         case '?':
 166           break;
 167
 168         default:
 169           printf ("?? getopt returned character code 0%o ??\n", c);
 170         }
 171     }
 172
 173   if (optind < argc)
 174     {
 175       printf ("non-option ARGV-elements: ");
 176       while (optind < argc)
 177         printf ("%s ", argv[optind++]);
 178       printf ("\n");
 179     }
 180
 181   exit (0);
 182 }
 183
 184 #endif /* TEST */