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
43 char *
pcap_strtok_r(char * s,const char * delim,char ** last)44 pcap_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 */
55 cont:
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