getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2 Copyright (C) 1987-1994, 1996-2012 Free Software Foundation, Inc.
   3
   4 NOTE: The canonical source of this file is maintained with the GNU C Library.
   5 Bugs can be reported to bug-glibc@gnu.org.
   6
   7 GNU Make is free software; you can redistribute it and/or modify it under the
   8 terms of the GNU General Public License as published by the Free Software
   9 Foundation; either version 3 of the License, or (at your option) any later
  10 version.
  11
  12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License along with
  17 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18 \f
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include "getopt.h"
  24
  25 #if !defined __STDC__ || !__STDC__
  26 /* This is a separate conditional since some stdc systems
  27    reject `defined (const)'.  */
  28 #ifndef const
  29 #define const
  30 #endif
  31 #endif
  32
  33 #include <stdio.h>
  34
  35 /* Comment out all this code if we are using the GNU C Library, and are not
  36    actually compiling the library itself.  This code is part of the GNU C
  37    Library, but also included in many other GNU distributions.  Compiling
  38    and linking in this code is a waste when using the GNU C library
  39    (especially if it is a shared library).  Rather than having every GNU
  40    program understand `configure --with-gnu-libc' and omit the object files,
  41    it is simpler to just do this in the source for each such file.  */
  42
  43 #define GETOPT_INTERFACE_VERSION 2
  44 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  45 #include <gnu-versions.h>
  46 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  47 #define ELIDE_CODE
  48 #endif
  49 #endif
  50
  51 #ifndef ELIDE_CODE
  52
  53
  54 /* This needs to come after some library #include
  55    to get __GNU_LIBRARY__ defined.  */
  56 #ifdef __GNU_LIBRARY__
  57 #include <stdlib.h>
  58 #endif
  59
  60 #ifndef NULL
  61 #define NULL 0
  62 #endif
  63
  64 int
  65 getopt_long (int argc, char *const *argv, const char *options,
  66              const struct option *long_options, int *opt_index)
  67 {
  68   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  69 }
  70
  71 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  72    If an option that starts with '-' (not '--') doesn't match a long option,
  73    but does match a short option, it is parsed as a short option
  74    instead.  */
  75
  76 int
  77 getopt_long_only (int argc, char *const *argv, const char *options,
  78                   const struct option *long_options, int *opt_index)
  79 {
  80   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  81 }
  82
  83
  84 #endif  /* Not ELIDE_CODE.  */
  85 \f
  86 #ifdef TEST
  87
  88 #include <stdio.h>
  89
  90 int
  91 main (int argc, char **argv)
  92 {
  93   int c;
  94   int digit_optind = 0;
  95
  96   while (1)
  97     {
  98       int this_option_optind = optind ? optind : 1;
  99       int option_index = 0;
 100       static struct option long_options[] =
 101       {
 102         {"add", 1, 0, 0},
 103         {"append", 0, 0, 0},
 104         {"delete", 1, 0, 0},
 105         {"verbose", 0, 0, 0},
 106         {"create", 0, 0, 0},
 107         {"file", 1, 0, 0},
 108         {0, 0, 0, 0}
 109       };
 110
 111       c = getopt_long (argc, argv, "abc:d:0123456789",
 112                        long_options, &option_index);
 113       if (c == -1)
 114         break;
 115
 116       switch (c)
 117         {
 118         case 0:
 119           printf ("option %s", long_options[option_index].name);
 120           if (optarg)
 121             printf (" with arg %s", optarg);
 122           printf ("\n");
 123           break;
 124
 125         case '0':
 126         case '1':
 127         case '2':
 128         case '3':
 129         case '4':
 130         case '5':
 131         case '6':
 132         case '7':
 133         case '8':
 134         case '9':
 135           if (digit_optind != 0 && digit_optind != this_option_optind)
 136             printf ("digits occur in two different argv-elements.\n");
 137           digit_optind = this_option_optind;
 138           printf ("option %c\n", c);
 139           break;
 140
 141         case 'a':
 142           printf ("option a\n");
 143           break;
 144
 145         case 'b':
 146           printf ("option b\n");
 147           break;
 148
 149         case 'c':
 150           printf ("option c with value '%s'\n", optarg);
 151           break;
 152
 153         case 'd':
 154           printf ("option d with value '%s'\n", optarg);
 155           break;
 156
 157         case '?':
 158           break;
 159
 160         default:
 161           printf ("?? getopt returned character code 0%o ??\n", c);
 162         }
 163     }
 164
 165   if (optind < argc)
 166     {
 167       printf ("non-option ARGV-elements: ");
 168       while (optind < argc)
 169         printf ("%s ", argv[optind++]);
 170       printf ("\n");
 171     }
 172
 173   exit (0);
 174 }
 175
 176 #endif /* TEST */