strsep.c revision 356345 
1/**
2 * strsep implementation for compatibility.
3 *
4  * LICENSE
5  * Copyright (c) 2016, NLnet Labs
6  * 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 are met:
10  * * Redistributions of source code must retain the above copyright notice,
11  *     this list of conditions and the following disclaimer.
12  * * 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.
15  * * Neither the name of NLnetLabs nor the names of its
16  *   contributors may be used to endorse or promote products derived from this
17  *   software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30 **/
31
32#include "config.h"
33
34/** see if character is in the delimiter array */
35static int
36in_delim(char c, const char* delim)
37{
38	const char* p;
39	if(!delim)
40		return 0;
41	for(p=delim; *p; p++) {
42		if(*p == c)
43			return 1;
44	}
45	return 0;
46}
47
48char *strsep(char **stringp, const char *delim)
49{
50	char* s;
51	char* orig;
52	if(stringp == NULL || *stringp == NULL)
53		return NULL;
54	orig = *stringp;
55	s = *stringp;
56	while(*s && !in_delim(*s, delim))
57		s++;
58	if(*s) {
59		*s = 0;
60		*stringp = s+1;
61	} else {
62		*stringp = NULL;
63	}
64	return orig;
65}
66