libiberty/getopt1.c

   1 /* getopt_long and getopt_long_only entry points for GNU getopt.
   2    Copyright (C) 1987-2022 Free Software Foundation, Inc.
   3
   4    NOTE: This source is derived from an old version taken from the GNU C
   5    Library (glibc).
   6
   7    This program is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published by the
   9    Free Software Foundation; either version 2, or (at your option) any
  10    later version.
  11
  12    This program 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
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
  20    USA.  */
  21 \f
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #if !defined __STDC__ || !__STDC__
  27 /* This is a separate conditional since some stdc systems
  28    reject `defined (const)'.  */
  29 #ifndef const
  30 #define const
  31 #endif
  32 #endif
  33
  34 #include <stdio.h>
  35
  36 #include "getopt.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
  57 /* This needs to come after some library #include
  58    to get __GNU_LIBRARY__ defined.  */
  59 #ifdef __GNU_LIBRARY__
  60 #include <stdlib.h>
  61 #endif
  62
  63 #ifndef NULL
  64 #define NULL 0
  65 #endif
  66
  67 int
  68 getopt_long (int argc,  char *const *argv,  const char *options,
  69              const struct option *long_options, int *opt_index)
  70 {
  71   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
  72 }
  73
  74 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
  75    If an option that starts with '-' (not '--') doesn't match a long option,
  76    but does match a short option, it is parsed as a short option
  77    instead.  */
  78
  79 int
  80 getopt_long_only (int argc, char *const *argv, const char *options,
  81                   const struct option *long_options, int *opt_index)
  82 {
  83   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
  84 }
  85
  86
  87 #endif  /* Not ELIDE_CODE.  */
  88 \f
  89 #ifdef TEST
  90
  91 #include <stdio.h>
  92
  93 int
  94 main (int argc, char **argv)
  95 {
  96   int c;
  97   int digit_optind = 0;
  98
  99   while (1)
 100     {
 101       int this_option_optind = optind ? optind : 1;
 102       int option_index = 0;
 103       static struct option long_options[] =
 104       {
 105         {"add", 1, 0, 0},
 106         {"append", 0, 0, 0},
 107         {"delete", 1, 0, 0},
 108         {"verbose", 0, 0, 0},
 109         {"create", 0, 0, 0},
 110         {"file", 1, 0, 0},
 111         {0, 0, 0, 0}
 112       };
 113
 114       c = getopt_long (argc, argv, "abc:d:0123456789",
 115                        long_options, &option_index);
 116       if (c == -1)
 117         break;
 118
 119       switch (c)
 120         {
 121         case 0:
 122           printf ("option %s", long_options[option_index].name);
 123           if (optarg)
 124             printf (" with arg %s", optarg);
 125           printf ("\n");
 126           break;
 127
 128         case '0':
 129         case '1':
 130         case '2':
 131         case '3':
 132         case '4':
 133         case '5':
 134         case '6':
 135         case '7':
 136         case '8':
 137         case '9':
 138           if (digit_optind != 0 && digit_optind != this_option_optind)
 139             printf ("digits occur in two different argv-elements.\n");
 140           digit_optind = this_option_optind;
 141           printf ("option %c\n", c);
 142           break;
 143
 144         case 'a':
 145           printf ("option a\n");
 146           break;
 147
 148         case 'b':
 149           printf ("option b\n");
 150           break;
 151
 152         case 'c':
 153           printf ("option c with value `%s'\n", optarg);
 154           break;
 155
 156         case 'd':
 157           printf ("option d with value `%s'\n", optarg);
 158           break;
 159
 160         case '?':
 161           break;
 162
 163         default:
 164           printf ("?? getopt returned character code 0%o ??\n", c);
 165         }
 166     }
 167
 168   if (optind < argc)
 169     {
 170       printf ("non-option ARGV-elements: ");
 171       while (optind < argc)
 172         printf ("%s ", argv[optind++]);
 173       printf ("\n");
 174     }
 175
 176   exit (0);
 177 }
 178
 179 #endif /* TEST */