1 /*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. 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 #include <netdissect-stdinc.h>
37
38 #include <string.h>
39
40 #include "netdissect.h"
41
42 /*
43 * Get next token from string *stringp, where tokens are possibly-empty
44 * strings separated by characters from delim.
45 *
46 * Writes NULs into the string at *stringp to end tokens.
47 * delim need not remain constant from call to call.
48 * On return, *stringp points past the last NUL written (if there might
49 * be further tokens), or is NULL (if there are definitely no more tokens).
50 *
51 * If *stringp is NULL, strsep returns NULL.
52 */
53 char *
strsep(char ** stringp,const char * delim)54 strsep(char **stringp, const char *delim)
55 {
56 char *s;
57 const char *spanp;
58 int c, sc;
59 char *tok;
60
61 if ((s = *stringp) == NULL)
62 return (NULL);
63 for (tok = s;;) {
64 c = *s++;
65 spanp = delim;
66 do {
67 if ((sc = *spanp++) == c) {
68 if (c == 0)
69 s = NULL;
70 else
71 s[-1] = 0;
72 *stringp = s;
73 return (tok);
74 }
75 } while (sc != 0);
76 }
77 /* NOTREACHED */
78 }
79