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 #include "lint.h"
31 #include <string.h>
32 #include <stddef.h>
33 #include <sys/types.h>
34
35 /*
36 * uses strpbrk and strspn to break string into tokens on
37 * sequentially subsequent calls. returns NULL when no
38 * non-separator characters remain.
39 * `subsequent' calls are calls with first argument NULL.
40 */
41 char *
strtok_r(char * string,const char * sepset,char ** lasts)42 strtok_r(char *string, const char *sepset, char **lasts)
43 {
44 char *q, *r;
45
46 /* first or subsequent call */
47 if (string == NULL)
48 string = *lasts;
49
50 if (string == NULL) /* return if no tokens remaining */
51 return (NULL);
52
53 q = string + strspn(string, sepset); /* skip leading separators */
54
55 if (*q == '\0') /* return if no tokens remaining */
56 return (NULL);
57
58 if ((r = strpbrk(q, sepset)) == NULL) /* move past token */
59 *lasts = NULL; /* indicate this is last token */
60 else {
61 *r = '\0';
62 *lasts = r + 1;
63 }
64 return (q);
65 }
66