getopt1.c
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上传日期:2007-01-04
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- /* 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 %cn", c);
- break;
- case 'a':
- printf ("option an");
- break;
- case 'b':
- printf ("option bn");
- 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 */