blob: d197734cb1a8a08877cf92859570e8bcd706b10e [file] [log] [blame]
Damien Miller80ecfe82000-09-24 11:21:31 +11001/*
2 * Copyright (c) 1988 Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "config.h"
35
36#ifndef HAVE_STRTOK_R
37
38#include "bsd-strtok.h"
39
40#if defined(LIBC_SCCS) && !defined(lint)
41static char *rcsid = "$OpenBSD: strtok.c,v 1.3 1999/11/09 11:19:46 art Exp $";
42#endif /* LIBC_SCCS and not lint */
43
44#include <string.h>
45
46char *strtok_r(char *s, const char *delim, char **last)
47{
48 register char *spanp;
49 register int c, sc;
50 char *tok;
51
52 if (s == NULL && (s = *last) == NULL)
53 return (NULL);
54
55 /*
56 * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
57 */
58cont:
59 c = *s++;
60 for (spanp = (char *)delim; (sc = *spanp++) != 0;) {
61 if (c == sc)
62 goto cont;
63 }
64
65 if (c == 0) { /* no non-delimiter characters */
66 *last = NULL;
67 return (NULL);
68 }
69 tok = s - 1;
70
71 /*
72 * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
73 * Note that delim must have one NUL; we stop if we see that, too.
74 */
75 for (;;) {
76 c = *s++;
77 spanp = (char *)delim;
78 do {
79 if ((sc = *spanp++) == c) {
80 if (c == 0)
81 s = NULL;
82 else
83 s[-1] = 0;
84 *last = s;
85 return (tok);
86 }
87 } while (sc != 0);
88 }
89 /* NOTREACHED */
90}
91
92#endif /* !HAVE_STRTOK_R */