1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include "lint.h"
33#include <string.h>
34#include <stddef.h>
35#include <sys/types.h>
36
37/*
38 * uses strpbrk and strspn to break string into tokens on
39 * sequentially subsequent calls.  returns NULL when no
40 * non-separator characters remain.
41 * `subsequent' calls are calls with first argument NULL.
42 */
43char *
44strtok_r(char *string, const char *sepset, char **lasts)
45{
46	char	*q, *r;
47
48	/* first or subsequent call */
49	if (string == NULL)
50		string = *lasts;
51
52	if (string == NULL)		/* return if no tokens remaining */
53		return (NULL);
54
55	q = string + strspn(string, sepset);	/* skip leading separators */
56
57	if (*q == '\0')		/* return if no tokens remaining */
58		return (NULL);
59
60	if ((r = strpbrk(q, sepset)) == NULL)	/* move past token */
61		*lasts = NULL;	/* indicate this is last token */
62	else {
63		*r = '\0';
64		*lasts = r + 1;
65	}
66	return (q);
67}
68