/*
 * Copyright (c) 2000, Boris Popov
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Boris Popov.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $Id: cfopt.c,v 1.1.1.1 2001/06/09 00:28:12 zarzycki Exp $
 */

#include <sys/types.h>

#include <stdio.h>
#include <string.h>
#include <synch.h>
#include <libintl.h>

#include <cflib.h>
#include <netsmb/smb_lib.h>
#include <assert.h>

/* lock for the variables below */
mutex_t cf_opt_mutex = DEFAULTMUTEX;

int     cf_opterr = 1,          /* if error message should be printed */
        cf_optind = 1,          /* index into parent argv vector */
        cf_optopt,                      /* character checked for validity */
        cf_optreset;            /* reset getopt */
const char *cf_optarg;          /* argument associated with option */

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

void
cf_opt_lock(void)
{
        mutex_lock(&cf_opt_mutex);
}

void
cf_opt_unlock(void)
{
        mutex_unlock(&cf_opt_mutex);
}

int
cf_getopt(nargc, nargv, ostr)
        int nargc;
        char * const *nargv;
        const char *ostr;
{
        static const char *place = EMSG;        /* option letter processing */
        char *oli;                              /* option letter list index */
        int tmpind;

        assert(MUTEX_HELD(&cf_opt_mutex));

        if (cf_optreset || !*place) {           /* update scanning pointer */
                cf_optreset = 0;
                tmpind = cf_optind;
                for (;;) {
                        if (tmpind >= nargc) {
                                place = EMSG;
                                return (-1);
                        }
                        if (*(place = nargv[tmpind]) != '-') {
                                tmpind++;
                                continue;       /* lookup next option */
                        }
                        if (place[1] && *++place == '-') {      /* found "--" */
                                cf_optind = ++tmpind;
                                place = EMSG;
                                return (-1);
                        }
                        cf_optind = tmpind;
                        break;
                }
        }                                       /* option letter okay? */
        if ((cf_optopt = (int)*place++) == (int)':' ||
            !(oli = strchr(ostr, cf_optopt))) {
                /*
                 * if the user didn't specify '-' as an option,
                 * assume it means -1.
                 */
                if (cf_optopt == (int)'-')
                        return (-1);
                if (!*place)
                        ++cf_optind;
                if (cf_opterr && *ostr != ':')
                        (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
                            "%s: illegal option -- %c\n"),
                            __progname, cf_optopt);
                return (BADCH);
        }
        if (*++oli != ':') {                    /* don't need argument */
                cf_optarg = NULL;
                if (!*place)
                        ++cf_optind;
        } else {                                        /* need an argument */
                if (*place)                     /* no white space */
                        cf_optarg = place;
                else if (nargc <= ++cf_optind) {        /* no arg */
                        place = EMSG;
                        if (*ostr == ':')
                                return (BADARG);
                        if (cf_opterr)
                                (void) fprintf(stderr, dgettext(TEXT_DOMAIN,
                                    "%s: option requires an argument -- %c\n"),
                                    __progname, cf_optopt);
                        return (BADCH);
                } else                          /* white space */
                        cf_optarg = nargv[cf_optind];
                place = EMSG;
                ++cf_optind;
        }
        return (cf_optopt);                     /* dump back option letter */
}