1/*-
2 * Copyright (c) 1998 Softweyr LLC.  All rights reserved.
3 *
4 * strtok_r, from Berkeley strtok
5 * Oct 13, 1998 by Wes Peters <wes@softweyr.com>
6 *
7 * Copyright (c) 1988, 1993
8 *	The Regents of the University of California.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notices, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notices, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
25 * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL SOFTWEYR LLC, THE
26 * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
28 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
30 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * From: @(#)strtok.c	8.1 (Berkeley) 6/4/93
35 */
36
37#ifdef HAVE_CONFIG_H
38#include <config.h>
39#endif
40
41#include "portability.h"
42
43char *
44pcap_strtok_r(char *s, const char *delim, char **last)
45{
46	char *spanp, *tok;
47	int c, sc;
48
49	if (s == NULL && (s = *last) == NULL)
50		return (NULL);
51
52	/*
53	 * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
54	 */
55cont:
56	c = *s++;
57	for (spanp = (char *)delim; (sc = *spanp++) != 0;) {
58		if (c == sc)
59			goto cont;
60	}
61
62	if (c == 0) {		/* no non-delimiter characters */
63		*last = NULL;
64		return (NULL);
65	}
66	tok = s - 1;
67
68	/*
69	 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
70	 * Note that delim must have one NUL; we stop if we see that, too.
71	 */
72	for (;;) {
73		c = *s++;
74		spanp = (char *)delim;
75		do {
76			if ((sc = *spanp++) == c) {
77				if (c == 0)
78					s = NULL;
79				else
80					s[-1] = '\0';
81				*last = s;
82				return (tok);
83			}
84		} while (sc != 0);
85	}
86	/* NOTREACHED */
87}
88