getopt1.c
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上传日期:2009-03-27
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文件大小:5k
- /* getopt_long and getopt_long_only entry points for GNU getopt.
- Copyright (C) 1987,88,89,90,91,92,93,94,96,97 Free Software Foundation, Inc.
- This file is part of the GNU C Library. Its master source is NOT part of
- the C library, however. The master source lives in /gd/gnu/lib.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
- The GNU C Library 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, 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. */
- #define GETOPT_INTERFACE_VERSION 2
- #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
- #include <gnu-versions.h>
- #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
- #define ELIDE_CODE
- #endif
- #endif
- #ifndef ELIDE_CODE
- /* This needs to come after some library #include
- to get __GNU_LIBRARY__ defined. */
- #ifdef __GNU_LIBRARY__
- #include <stdlib.h>
- #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 /* Not ELIDE_CODE. */
- #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 == -1)
- 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 */