1/*	$NetBSD$	*/
2
3#if defined(LIBC_SCCS) && !defined(lint)
4static const char sccsid[] = "strsep.c	8.1 (Berkeley) 6/4/93";
5static const char rcsid[] = "Id: strsep.c,v 1.2 2005/04/27 04:56:12 sra Exp ";
6#endif /* LIBC_SCCS and not lint */
7
8/*
9 * Copyright (c) 1990, 1993
10 *	The Regents of the University of California.  All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 *    must display the following acknowledgement:
22 *	This product includes software developed by the University of
23 *	California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 *    may be used to endorse or promote products derived from this software
26 *    without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41#include "port_before.h"
42#include <sys/cdefs.h>
43#include <string.h>
44#include <stdio.h>
45#include "port_after.h"
46
47#ifndef NEED_STRSEP
48int __strsep_unneeded__;
49#else
50
51/*%
52 * Get next token from string *stringp, where tokens are possibly-empty
53 * strings separated by characters from delim.
54 *
55 * Writes NULs into the string at *stringp to end tokens.
56 * delim need not remain constant from call to call.
57 * On return, *stringp points past the last NUL written (if there might
58 * be further tokens), or is NULL (if there are definitely no more tokens).
59 *
60 * If *stringp is NULL, strsep returns NULL.
61 */
62char *
63strsep(char **stringp, const char *delim) {
64	char *s;
65	const char *spanp;
66	int c, sc;
67	char *tok;
68
69	if ((s = *stringp) == NULL)
70		return (NULL);
71	for (tok = s;;) {
72		c = *s++;
73		spanp = delim;
74		do {
75			if ((sc = *spanp++) == c) {
76				if (c == 0)
77					s = NULL;
78				else
79					s[-1] = 0;
80				*stringp = s;
81				return (tok);
82			}
83		} while (sc != 0);
84	}
85	/* NOTREACHED */
86}
87
88#endif /*NEED_STRSEP*/
89
90/*! \file */
91