/*
 * |-----------------------------------------------------------|
 * | Copyright (c) 1990 MIPS Computer Systems, Inc.            |
 * | All Rights Reserved                                       |
 * |-----------------------------------------------------------|
 * |          Restricted Rights Legend                         |
 * | Use, duplication, or disclosure by the Government is      |
 * | subject to restrictions as set forth in                   |
 * | subparagraph (c)(1)(ii) of the Rights in Technical        |
 * | Data and Computer Software Clause of DFARS 52.227-7013.   |
 * |         MIPS Computer Systems, Inc.                       |
 * |         928 Arques Avenue                                 |
 * |         Sunnyvale, CA 94086                               |
 * |-----------------------------------------------------------|
 */
#ident	"$Header: wstok.c,v 1.1.2.1 92/06/24 14:11:17 marker Exp $"

/*	Copyright (c) 1986 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/

/*	This module is created for NLS on Sep.03.86		*/

#ident	"@(#)libw-port:wstring/wstok.c	1.0"

/*
 * uses wspbrk and wsspn to break string into tokens on
 * sequentially subsequent calls. returns NULL when no
 * non-separator characters remain.
 * 'subsequent' calls are calls with first argument NULL.
 */

#define  WNULL 	(wchar_t *)0
#include <widec.h>

wchar_t *
wstok(string, sepset)
wchar_t *string, *sepset;
{
	register wchar_t *p, *q, *r;
	static wchar_t *savept = 0;

	/* first or subsequent call */
	p = ((string == WNULL) ? savept: string);

	/* return if no tokens remaining */
	if (p == WNULL)
		return(WNULL);

	/* skip leading separators */
	q = p + wsspn(p, sepset);

	/* return if no tokens remaining */
	if (*q == 0)
		return(WNULL);

	/* move past token */
	if ((r = wspbrk(q, sepset)) == WNULL)
		savept = WNULL; /* indicate this is last token */
	else {
		*r = 0;
		savept = ++r;
	}

	return(q);
}
