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Damien Miller329638e2003-06-03 12:12:50 +10001/* $OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $ */
Damien Miller3077fb92000-07-11 21:34:34 +10002
3/*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
Damien Miller329638e2003-06-03 12:12:50 +100015 * 3. Neither the name of the University nor the names of its contributors
Damien Miller3077fb92000-07-11 21:34:34 +100016 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
Ben Lindstromdd21fe92002-06-27 18:23:20 +000032#include "includes.h"
Damien Miller3077fb92000-07-11 21:34:34 +100033
34#if !defined(HAVE_STRSEP)
35
36#include <string.h>
37#include <stdio.h>
38
39#if defined(LIBC_SCCS) && !defined(lint)
40#if 0
41static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
42#else
Damien Miller329638e2003-06-03 12:12:50 +100043static char *rcsid = "$OpenBSD: strsep.c,v 1.4 2003/06/02 20:18:38 millert Exp $";
Damien Miller3077fb92000-07-11 21:34:34 +100044#endif
45#endif /* LIBC_SCCS and not lint */
46
47/*
48 * Get next token from string *stringp, where tokens are possibly-empty
49 * strings separated by characters from delim.
50 *
51 * Writes NULs into the string at *stringp to end tokens.
52 * delim need not remain constant from call to call.
53 * On return, *stringp points past the last NUL written (if there might
54 * be further tokens), or is NULL (if there are definitely no more tokens).
55 *
56 * If *stringp is NULL, strsep returns NULL.
57 */
58char *
59strsep(char **stringp, const char *delim)
60{
61 register char *s;
62 register const char *spanp;
63 register int c, sc;
64 char *tok;
65
66 if ((s = *stringp) == NULL)
67 return (NULL);
68 for (tok = s;;) {
69 c = *s++;
70 spanp = delim;
71 do {
72 if ((sc = *spanp++) == c) {
73 if (c == 0)
74 s = NULL;
75 else
76 s[-1] = 0;
77 *stringp = s;
78 return (tok);
79 }
80 } while (sc != 0);
81 }
82 /* NOTREACHED */
83}
84
85#endif /* !defined(HAVE_STRSEP) */