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 #if defined(LIBC_SCCS) && !defined(lint)
37 static const char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93";
38 #endif /* LIBC_SCCS and not lint */
39 #else
40 __RCSID("$NetBSD: strsep.c,v 1.2 2014/01/26 21:43:45 christos Exp $");
41 #endif
42
43 #include <string.h>
44 #include <stdio.h>
45
46 /*
47 * Get next token from string *stringp, where tokens are possibly-empty
48 * strings separated by characters from delim.
49 *
50 * Writes NULs into the string at *stringp to end tokens.
51 * delim need not remain constant from call to call.
52 * On return, *stringp points past the last NUL written (if there might
53 * be further tokens), or is NULL (if there are definitely no more tokens).
54 *
55 * If *stringp is NULL, strsep returns NULL.
56 *
57 * PUBLIC: #ifndef HAVE_STRSEP
58 * PUBLIC: char *strsep __P((char **, const char *));
59 * PUBLIC: #endif
60 */
61 char *
strsep(register char ** stringp,register const char * delim)62 strsep(register char **stringp, register const char *delim)
63 {
64 register char *s;
65 register const char *spanp;
66 register 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