posix/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987-1994,1996-1998,2004,2009 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19 \f
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #ifdef _LIBC
  25 # include <getopt.h>
  26 #else
  27 # include "getopt.h"
  28 #endif
  29 #include "getopt_int.h"
  30
  31 #include <stdio.h>
  32
  33 /* Comment out all this code if we are using the GNU C Library, and are not
  34    actually compiling the library itself.  This code is part of the GNU C
  35    Library, but also included in many other GNU distributions.  Compiling
  36    and linking in this code is a waste when using the GNU C library
  37    (especially if it is a shared library).  Rather than having every GNU
  38    program understand `configure --with-gnu-libc' and omit the object files,
  39    it is simpler to just do this in the source for each such file.  */
  40
  41 #define GETOPT_INTERFACE_VERSION 2
  42 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  43 #include <gnu-versions.h>
  44 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  45 #define ELIDE_CODE
  46 #endif
  47 #endif
  48
  49 #ifndef ELIDE_CODE
  50
  51
  52 /* This needs to come after some library #include
  53    to get __GNU_LIBRARY__ defined.  */
  54 #ifdef __GNU_LIBRARY__
  55 #include <stdlib.h>
  56 #endif
  57
  58 #ifndef NULL
  59 #define NULL 0
  60 #endif
  61
  62 int
  63 getopt_long (int argc, char *const *argv, const char *options,
  64              const struct option *long_options, int *opt_index)
  65 {
  66   return _getopt_internal (argc, argv, options, long_options, opt_index, 0, 0);
  67 }
  68
  69 int
  70 _getopt_long_r (int argc, char *const *argv, const char *options,
  71                 const struct option *long_options, int *opt_index,
  72                 struct _getopt_data *d)
  73 {
  74   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  75                              0, d, 0);
  76 }
  77
  78 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  79    If an option that starts with '-' (not '--') doesn't match a long option,
  80    but does match a short option, it is parsed as a short option
  81    instead.  */
  82
  83 int
  84 getopt_long_only (int argc, char *const *argv, const char *options,
  85                   const struct option *long_options, int *opt_index)
  86 {
  87   return _getopt_internal (argc, argv, options, long_options, opt_index, 1, 0);
  88 }
  89
  90 int
  91 _getopt_long_only_r (int argc, char *const *argv, const char *options,
  92                      const struct option *long_options, int *opt_index,
  93                      struct _getopt_data *d)
  94 {
  95   return _getopt_internal_r (argc, argv, options, long_options, opt_index,
  96                              1, d, 0);
  97 }
  98
  99 #endif  /* Not ELIDE_CODE.  */
 100 \f
 101 #ifdef TEST
 102
 103 #include <stdio.h>
 104
 105 int
 106 main (int argc, char **argv)
 107 {
 108   int c;
 109   int digit_optind = 0;
 110
 111   while (1)
 112     {
 113       int this_option_optind = optind ? optind : 1;
 114       int option_index = 0;
 115       static struct option long_options[] =
 116       {
 117         {"add", 1, 0, 0},
 118         {"append", 0, 0, 0},
 119         {"delete", 1, 0, 0},
 120         {"verbose", 0, 0, 0},
 121         {"create", 0, 0, 0},
 122         {"file", 1, 0, 0},
 123         {0, 0, 0, 0}
 124       };
 125
 126       c = getopt_long (argc, argv, "abc:d:0123456789",
 127                        long_options, &option_index);
 128       if (c == -1)
 129         break;
 130
 131       switch (c)
 132         {
 133         case 0:
 134           printf ("option %s", long_options[option_index].name);
 135           if (optarg)
 136             printf (" with arg %s", optarg);
 137           printf ("\n");
 138           break;
 139
 140         case '0':
 141         case '1':
 142         case '2':
 143         case '3':
 144         case '4':
 145         case '5':
 146         case '6':
 147         case '7':
 148         case '8':
 149         case '9':
 150           if (digit_optind != 0 && digit_optind != this_option_optind)
 151             printf ("digits occur in two different argv-elements.\n");
 152           digit_optind = this_option_optind;
 153           printf ("option %c\n", c);
 154           break;
 155
 156         case 'a':
 157           printf ("option a\n");
 158           break;
 159
 160         case 'b':
 161           printf ("option b\n");
 162           break;
 163
 164         case 'c':
 165           printf ("option c with value `%s'\n", optarg);
 166           break;
 167
 168         case 'd':
 169           printf ("option d with value `%s'\n", optarg);
 170           break;
 171
 172         case '?':
 173           break;
 174
 175         default:
 176           printf ("?? getopt returned character code 0%o ??\n", c);
 177         }
 178     }
 179
 180   if (optind < argc)
 181     {
 182       printf ("non-option ARGV-elements: ");
 183       while (optind < argc)
 184         printf ("%s ", argv[optind++]);
 185       printf ("\n");
 186     }
 187
 188   exit (0);
 189 }
 190
 191 #endif /* TEST */