getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987,88,89,90,91,92,93,94,96,97 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU C Library.  Its master source is NOT part of
   5    the C library, however.  The master source lives in /gd/gnu/lib.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Library General Public License as
   9    published by the Free Software Foundation; either version 2 of the
  10    License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Library General Public License for more details.
  16
  17    You should have received a copy of the GNU Library General Public
  18    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  19    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include "getopt.h"
  27
  28 #if !defined (__STDC__) || !__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 #define GETOPT_INTERFACE_VERSION 2
  47 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
  48 #include <gnu-versions.h>
  49 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  50 #define ELIDE_CODE
  51 #endif
  52 #endif
  53
  54 #ifndef ELIDE_CODE
  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 #endif
  61
  62 #ifndef NULL
  63 #define NULL 0
  64 #endif
  65
  66 int
  67     getopt_long(argc, argv, options, long_options, opt_index)
  68      int argc;
  69      char *const *argv;
  70      const char *options;
  71      const struct option *long_options;
  72      int *opt_index;
  73 {
  74         return _getopt_internal(argc, argv, options, long_options, opt_index, 0);
  75 }
  76
  77 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  78    If an option that starts with '-' (not '--') doesn't match a long option,
  79    but does match a short option, it is parsed as a short option
  80    instead.  */
  81
  82 int
  83     getopt_long_only(argc, argv, options, long_options, opt_index)
  84      int argc;
  85      char *const *argv;
  86      const char *options;
  87      const struct option *long_options;
  88      int *opt_index;
  89 {
  90         return _getopt_internal(argc, argv, options, long_options, opt_index, 1);
  91 }
  92
  93 #endif /* Not ELIDE_CODE.  */
  94
  95 #ifdef TEST
  96
  97 #include <stdio.h>
  98
  99 int
 100     main(argc, argv)
 101      int argc;
 102      char **argv;
 103 {
 104         int c;
 105         int digit_optind = 0;
 106
 107         while (1)
 108         {
 109                 int this_option_optind = optind ? optind : 1;
 110                 int option_index = 0;
 111                 static struct option long_options[] =
 112                 {
 113                         {"add", 1, 0, 0},
 114                         {"append", 0, 0, 0},
 115                         {"delete", 1, 0, 0},
 116                         {"verbose", 0, 0, 0},
 117                         {"create", 0, 0, 0},
 118                         {"file", 1, 0, 0},
 119                         {0, 0, 0, 0}
 120                 };
 121
 122                 c = getopt_long(argc, argv, "abc:d:0123456789",
 123                                 long_options, &option_index);
 124                 if (c == -1)
 125                         break;
 126
 127                 switch (c)
 128                 {
 129                         case 0:
 130                                 printf("option %s", long_options[option_index].name);
 131                                 if (optarg)
 132                                         printf(" with arg %s", optarg);
 133                                 printf("\n");
 134                                 break;
 135
 136                         case '0':
 137                         case '1':
 138                         case '2':
 139                         case '3':
 140                         case '4':
 141                         case '5':
 142                         case '6':
 143                         case '7':
 144                         case '8':
 145                         case '9':
 146                                 if (digit_optind != 0 && digit_optind != this_option_optind)
 147                                         printf("digits occur in two different argv-elements.\n");
 148                                 digit_optind = this_option_optind;
 149                                 printf("option %c\n", c);
 150                                 break;
 151
 152                         case 'a':
 153                                 printf("option a\n");
 154                                 break;
 155
 156                         case 'b':
 157                                 printf("option b\n");
 158                                 break;
 159
 160                         case 'c':
 161                                 printf("option c with value `%s'\n", optarg);
 162                                 break;
 163
 164                         case 'd':
 165                                 printf("option d with value `%s'\n", optarg);
 166                                 break;
 167
 168                         case '?':
 169                                 break;
 170
 171                         default:
 172                                 printf("?? getopt returned character code 0%o ??\n", c);
 173                 }
 174         }
 175
 176         if (optind < argc)
 177         {
 178                 printf("non-option ARGV-elements: ");
 179                 while (optind < argc)
 180                         printf("%s ", argv[optind++]);
 181                 printf("\n");
 182         }
 183
 184         exit(0);
 185 }
 186
 187 #endif /* TEST */