dsniff  2.4b2
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strsep.c
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1 /* $Id: strsep.c,v 1.1 2000/11/28 18:26:52 dugsong Exp $ */
2 /* $OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $ */
3 
4 /*-
5  * Copyright (c) 1990, 1993
6  * The Regents of the University of California. All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  * must display the following acknowledgement:
18  * This product includes software developed by the University of
19  * California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  * may be used to endorse or promote products derived from this software
22  * without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 #include <string.h>
38 #include <stdio.h>
39 
40 /*
41  * Get next token from string *stringp, where tokens are possibly-empty
42  * strings separated by characters from delim.
43  *
44  * Writes NULs into the string at *stringp to end tokens.
45  * delim need not remain constant from call to call.
46  * On return, *stringp points past the last NUL written (if there might
47  * be further tokens), or is NULL (if there are definitely no more tokens).
48  *
49  * If *stringp is NULL, strsep returns NULL.
50  */
51 char *
52 strsep(stringp, delim)
53  register char **stringp;
54  register const char *delim;
55 {
56  register char *s;
57  register const char *spanp;
58  register 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 }
strsep
char * strsep(char **stringp, const char *delim)
Definition: strsep.c:52