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229f64ee | 1 | /* $OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $ */ |
2 | ||
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. | |
15 | * 3. All advertising materials mentioning features or use of this software | |
16 | * must display the following acknowledgement: | |
17 | * This product includes software developed by the University of | |
18 | * California, Berkeley and its contributors. | |
19 | * 4. Neither the name of the University nor the names of its contributors | |
20 | * may be used to endorse or promote products derived from this software | |
21 | * without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
33 | * SUCH DAMAGE. | |
34 | */ | |
35 | ||
36 | #include "config.h" | |
37 | ||
38 | #if !defined(HAVE_STRSEP) | |
39 | ||
40 | #include <string.h> | |
41 | #include <stdio.h> | |
42 | ||
43 | #if defined(LIBC_SCCS) && !defined(lint) | |
44 | #if 0 | |
45 | static char sccsid[] = "@(#)strsep.c 8.1 (Berkeley) 6/4/93"; | |
46 | #else | |
47 | static char *rcsid = "$OpenBSD: strsep.c,v 1.3 1997/08/20 04:28:14 millert Exp $"; | |
48 | #endif | |
49 | #endif /* LIBC_SCCS and not lint */ | |
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 | */ | |
62 | char * | |
63 | strsep(char **stringp, const char *delim) | |
64 | { | |
65 | register char *s; | |
66 | register const char *spanp; | |
67 | register int c, sc; | |
68 | char *tok; | |
69 | ||
70 | if ((s = *stringp) == NULL) | |
71 | return (NULL); | |
72 | for (tok = s;;) { | |
73 | c = *s++; | |
74 | spanp = delim; | |
75 | do { | |
76 | if ((sc = *spanp++) == c) { | |
77 | if (c == 0) | |
78 | s = NULL; | |
79 | else | |
80 | s[-1] = 0; | |
81 | *stringp = s; | |
82 | return (tok); | |
83 | } | |
84 | } while (sc != 0); | |
85 | } | |
86 | /* NOTREACHED */ | |
87 | } | |
88 | ||
89 | #endif /* !defined(HAVE_STRSEP) */ |