File: getopt.h

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/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
/*	$FreeBSD: src/include/getopt.h,v 1.6.34.1 2010/12/21 17:10:29 kensmith Exp $ */

/*-
 * Copyright (c) 2000 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Dieter Baron and Thomas Klausner.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _GETOPT_H_
#define _GETOPT_H_

#if !defined(_WIN32) && !defined(_WIN64)
#   include <sys/cdefs.h>
#endif

/*
 * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
 * getopt() is declared here too for GNU programs.
 */
#define no_argument        0
#define required_argument  1
#define optional_argument  2

struct option {
	/* name of long option */
	const char *name;
	/*
	 * one of no_argument, required_argument, and optional_argument:
	 * whether option takes an argument
	 */
	int has_arg;
	/* if not NULL, set *flag to val when option found */
	int *flag;
	/* if flag not NULL, value to set *flag to; else return value */
	int val;
};

extern int	getopt_long(int, char * const *, const char *,
	const struct option *, int *);
extern int	getopt_long_only(int, char * const *, const char *,
	const struct option *, int *);
#ifndef _GETOPT_DECLARED
#define	_GETOPT_DECLARED
int	 getopt(int, char * const [], const char *);

extern char *optarg;			/* getopt(3) external variables */
extern int optind, opterr, optopt;
#endif
#ifndef _OPTRESET_DECLARED
#define	_OPTRESET_DECLARED
extern int optreset;			/* getopt(3) external variable */
#endif
 
#endif /* !_GETOPT_H_ */