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getopt1.c

Go to the documentation of this file.

/* getopt_long and getopt_long_only entry points for GNU getopt.
   Copyright (C) 1987, 88, 89, 90, 91, 92, 1993, 1994
        Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any later
   version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
   Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, 675
   Mass Ave, Cambridge, MA 02139, USA.  */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "getopt.h"

#if !defined (__STDC__) || !__STDC__
/* This is a separate conditional since some stdc systems
   reject `defined (const)'.  */
#ifndef const
#define const
#endif
#endif

#include <stdio.h>

/* Comment out all this code if we are using the GNU C Library, and are not
   actually compiling the library itself.  This code is part of the GNU C
   Library, but also included in many other GNU distributions.  Compiling
   and linking in this code is a waste when using the GNU C library
   (especially if it is a shared library).  Rather than having every GNU
   program understand `configure --with-gnu-libc' and omit the object files,
   it is simpler to just do this in the source for each such file.  */

#if defined (_LIBC) || !defined (__GNU_LIBRARY__)


/* This needs to come after some library #include
   to get __GNU_LIBRARY__ defined.  */
#ifdef __GNU_LIBRARY__
#include <stdlib.h>
#else
char *getenv();
#endif

#ifndef NULL
#define NULL 0
#endif

int getopt_long(argc, argv, options, long_options, opt_index)
int argc;
char *const *argv;
const char *options;
const struct option *long_options;
int *opt_index;
{
        return _getopt_internal(argc, argv, options, long_options,
                                opt_index, 0);
}

/* Like getopt_long, but '-' as well as '--' can indicate a long option.  If
   an option that starts with '-' (not '--') doesn't match a long option,
   but does match a short option, it is parsed as a short option instead. 
 */

int getopt_long_only(argc, argv, options, long_options, opt_index)
int argc;
char *const *argv;
const char *options;
const struct option *long_options;
int *opt_index;
{
        return _getopt_internal(argc, argv, options, long_options,
                                opt_index, 1);
}


#endif                          /* _LIBC or not __GNU_LIBRARY__.  */

#ifdef TEST

#include <stdio.h>

int main(argc, argv)
int argc;
char **argv;
{
        int c;
        int digit_optind = 0;

        while (1) {
                int this_option_optind = optind ? optind : 1;
                int option_index = 0;
                static struct option long_options[] == {
                        {"add", 1, 0, 0},
                        {"append", 0, 0, 0},
                        {"delete", 1, 0, 0},
                        {"verbose", 0, 0, 0},
                        {"create", 0, 0, 0},
                        {"file", 1, 0, 0},
                        {0, 0, 0, 0}
                };

                c = getopt_long(argc, argv, "abc:d:0123456789",
                                long_options, &option_index);
                if (c == EOF)
                        break;

                switch (c) {
                case 0:
                        printf("option %s",
                               long_options[option_index].name);
                        if (optarg)
                                printf(" with arg %s", optarg);
                        printf("\n");
                        break;

                case '0':
                case '1':
                case '2':
                case '3':
                case '4':
                case '5':
                case '6':
                case '7':
                case '8':
                case '9':
                        if (digit_optind != 0
                            && digit_optind != this_option_optind)
                                printf
                                    ("digits occur in two different argv-elements.\n");
                        digit_optind = this_option_optind;
                        printf("option %c\n", c);
                        break;

                case 'a':
                        printf("option a\n");
                        break;

                case 'b':
                        printf("option b\n");
                        break;

                case 'c':
                        printf("option c with value `%s'\n", optarg);
                        break;

                case 'd':
                        printf("option d with value `%s'\n", optarg);
                        break;

                case '?':
                        break;

                default:
                        printf
                            ("?? getopt returned character code 0%o ??\n",
                             c);
                }
        }

        if (optind < argc) {
                printf("non-option ARGV-elements: ");
                while (optind < argc)
                        printf("%s ", argv[optind++]);
                printf("\n");
        }

        exit(0);
}

#endif                          /* TEST */

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