/*
 * Copyright (c) 1987, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif

#if !defined(HAVE_GETOPT) || defined(WIN32)

int   opterr = 1; /* if error message should be printed */
int   optind = 1; /* index into parent argv vector */
int   optopt;     /* character checked for validity */
int   optreset;   /* reset getopt */
char *optarg;     /* argument associated with option */

#define BADCH (int)'?'
#define BADARG (int)':'
#define EMSG ""

/*
 * getopt --
 *	Parse argc/argv argument vector.
 */
int getopt(int nargc, char *const nargv[], const char *ostr)
{
	static char *place      = EMSG; /* option letter processing */
	char        *__progname = "";
	char        *oli;               /* option letter list index */

	if (ostr == NULL)
		return (-1);

	if (optreset || !*place) { /* update scanning pointer */
		optreset = 0;
		if (optind >= nargc || *(place = nargv[optind]) != '-') {
			place = EMSG;
			return (-1);
		}
		if (place[1] && *++place == '-') { /* found "--" */
			++optind;
			place = EMSG;
			return (-1);
		}
	} /* option letter okay? */
	if ((optopt = (int)*place++) == (int)':' || !(oli = strchr(ostr, optopt))) {
		/* if the user didn't specify '-' as an option, assume it means -1 */
		if (optopt == (int)'-')
			return (-1);
		if (!*place)
			++optind;
		if (opterr && *ostr != ':')
			(void)fprintf(stderr, "%s: illegal option -- %c\n", __progname, optopt);
		return (BADCH);
	}
	if (*++oli != ':') { /* don't need argument */
		optarg = NULL;
		if (!*place)
			++optind;
	} else {            /* need an argument */
		if (*place) /* no white space */
			optarg = place;
		else if (nargc <= ++optind) { /* no arg */
			place = EMSG;
			if (*ostr == ':')
				return (BADARG);
			if (opterr)
				(void)fprintf(stderr, "%s: option requires an argument -- %c\n", __progname, optopt);
			return (BADCH);
		} else /* white space */
			optarg = nargv[optind];
		place = EMSG;
		++optind;
	}
	return (optopt); /* dump back option letter */
}
#endif /* !HAVE_GETOPT || WIN32 */
