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/*-

 * Copyright (c) 1990, 1993

 *      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. All advertising materials mentioning features or use of this software

 *    must display the following acknowledgement:

 *      This product includes software developed by the University of

 *      California, Berkeley and its contributors.

 * 4. 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.

 *

 *  $Id: strsep.c,v 1.2 2001-09-27 12:01:53 chris Exp $

 */

#if defined(LIBC_SCCS) && !defined(lint)

static const char sccsid[] = "@(#)strsep.c      8.1 (Berkeley) 6/4/93";

#endif /* LIBC_SCCS and not lint */

#include <string.h>

#include <stdio.h>

/*

 * Get next token from string *stringp, where tokens are possibly-empty

 * strings separated by characters from delim.

 *

 * Writes NULs into the string at *stringp to end tokens.

 * delim need not remain constant from call to call.

 * On return, *stringp points past the last NUL written (if there might

 * be further tokens), or is NULL (if there are definitely no more tokens).

 *

 * If *stringp is NULL, strsep returns NULL.

 *

 * PUBLIC: #ifndef HAVE_STRSEP

 * PUBLIC: char *strsep __P((char **, const char *));

 * PUBLIC: #endif

 */

char *

strsep(stringp, delim)

        register char **stringp;

        register const char *delim;

{

        register char *s;

        register const char *spanp;

        register int c, sc;

        char *tok;

        if ((s = *stringp) == NULL)

                return (NULL);

        for (tok = s;;) {

                c = *s++;

                spanp = delim;

                do {

                        if ((sc = *spanp++) == c) {

                                if (c == 0)

                                        s = NULL;

                                else

                                        s[-1] = 0;

                                *stringp = s;

                                return (tok);

                        }

                } while (sc != 0);

        }

        /* NOTREACHED */

}