#ifndef _GETOPT_H_
#define _GETOPT_H_

#include <sys/cdefs.h>

/****************************************************************************************************************/

/*-
 * 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.
 */

/****************************************************************************************************************/

#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;
};

/****************************************************************************************************************/

__BEGIN_DECLS

extern int getopt(int nargc, char * const *nargv, const char *options);

extern int getopt_long(int nargc, char *const *nargv,
		       const char *options, const struct option *long_options, int *idx);

/****************************************************************************************************************/

extern int opterr;		// if error message should be printed
extern int optind;		// index into parent argv vector
extern int optopt;		// character checked for validity
extern int optreset;		// reset getopt
extern char *optarg;		// argument associated with option
extern const char *optplace;	// Current parsing location in a string of options

__END_DECLS

/****************************************************************************************************************/
#endif /* !_GETOPT_H_ */
