libiberty/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
   6    modify it under the terms of the GNU Library General Public License
   7    as published by the Free Software Foundation; either version 2, or
   8    (at your option) any 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 Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18 \f
  19 #ifdef HAVE_CONFIG_H
  20 #if defined (emacs) || defined (CONFIG_BROKETS)
  21 /* We use <config.h> instead of "config.h" so that a compilation
  22    using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
  23    (which it would do because it found this file in $srcdir).  */
  24 #include <config.h>
  25 #else
  26 #include "config.h"
  27 #endif
  28 #endif
  29
  30 #include "getopt.h"
  31
  32 #ifndef __STDC__
  33 /* This is a separate conditional since some stdc systems
  34    reject `defined (const)'.  */
  35 #ifndef const
  36 #define const
  37 #endif
  38 #endif
  39
  40 #include <stdio.h>
  41
  42 /* Comment out all this code if we are using the GNU C Library, and are not
  43    actually compiling the library itself.  This code is part of the GNU C
  44    Library, but also included in many other GNU distributions.  Compiling
  45    and linking in this code is a waste when using the GNU C library
  46    (especially if it is a shared library).  Rather than having every GNU
  47    program understand `configure --with-gnu-libc' and omit the object files,
  48    it is simpler to just do this in the source for each such file.  */
  49 /* Many versions of the Linux C library include older, broken versions
  50    of these routines, which will break the linker's command-line
  51    parsing.  */
  52
  53 #if defined (_LIBC) || !defined (__GNU_LIBRARY__) || defined (__linux__)
  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 #else
  61 char *getenv ();
  62 #endif
  63
  64 #ifndef NULL
  65 #define NULL 0
  66 #endif
  67
  68 int
  69 getopt_long (argc, argv, options, long_options, opt_index)
  70      int argc;
  71      char *const *argv;
  72      const char *options;
  73      const struct option *long_options;
  74      int *opt_index;
  75 {
  76   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  77 }
  78
  79 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  80    If an option that starts with '-' (not '--') doesn't match a long option,
  81    but does match a short option, it is parsed as a short option
  82    instead.  */
  83
  84 int
  85 getopt_long_only (argc, argv, options, long_options, opt_index)
  86      int argc;
  87      char *const *argv;
  88      const char *options;
  89      const struct option *long_options;
  90      int *opt_index;
  91 {
  92   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  93 }
  94
  95
  96 #endif  /* _LIBC or not __GNU_LIBRARY__.  */
  97 \f
  98 #ifdef TEST
  99
 100 #include <stdio.h>
 101
 102 int
 103 main (argc, argv)
 104      int argc;
 105      char **argv;
 106 {
 107   int c;
 108   int digit_optind = 0;
 109
 110   while (1)
 111     {
 112       int this_option_optind = optind ? optind : 1;
 113       int option_index = 0;
 114       static struct option long_options[] =
 115       {
 116         {"add", 1, 0, 0},
 117         {"append", 0, 0, 0},
 118         {"delete", 1, 0, 0},
 119         {"verbose", 0, 0, 0},
 120         {"create", 0, 0, 0},
 121         {"file", 1, 0, 0},
 122         {0, 0, 0, 0}
 123       };
 124
 125       c = getopt_long (argc, argv, "abc:d:0123456789",
 126                        long_options, &option_index);
 127       if (c == EOF)
 128         break;
 129
 130       switch (c)
 131         {
 132         case 0:
 133           printf ("option %s", long_options[option_index].name);
 134           if (optarg)
 135             printf (" with arg %s", optarg);
 136           printf ("\n");
 137           break;
 138
 139         case '0':
 140         case '1':
 141         case '2':
 142         case '3':
 143         case '4':
 144         case '5':
 145         case '6':
 146         case '7':
 147         case '8':
 148         case '9':
 149           if (digit_optind != 0 && digit_optind != this_option_optind)
 150             printf ("digits occur in two different argv-elements.\n");
 151           digit_optind = this_option_optind;
 152           printf ("option %c\n", c);
 153           break;
 154
 155         case 'a':
 156           printf ("option a\n");
 157           break;
 158
 159         case 'b':
 160           printf ("option b\n");
 161           break;
 162
 163         case 'c':
 164           printf ("option c with value `%s'\n", optarg);
 165           break;
 166
 167         case 'd':
 168           printf ("option d with value `%s'\n", optarg);
 169           break;
 170
 171         case '?':
 172           break;
 173
 174         default:
 175           printf ("?? getopt returned character code 0%o ??\n", c);
 176         }
 177     }
 178
 179   if (optind < argc)
 180     {
 181       printf ("non-option ARGV-elements: ");
 182       while (optind < argc)
 183         printf ("%s ", argv[optind++]);
 184       printf ("\n");
 185     }
 186
 187   exit (0);
 188 }
 189
 190 #endif /* TEST */