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bcdaaeab | 1 | /* |
2 | * Copyright (c) 1988 Regents of the University of California. | |
3 | * 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 | #ifndef HAVE_STRTOK_R | |
37 | ||
38 | #include "bsd-strtok.h" | |
39 | ||
40 | #if defined(LIBC_SCCS) && !defined(lint) | |
41 | static char *rcsid = "$OpenBSD: strtok.c,v 1.3 1999/11/09 11:19:46 art Exp $"; | |
42 | #endif /* LIBC_SCCS and not lint */ | |
43 | ||
44 | #include <string.h> | |
45 | ||
46 | char *strtok_r(char *s, const char *delim, char **last) | |
47 | { | |
48 | register char *spanp; | |
49 | register int c, sc; | |
50 | char *tok; | |
51 | ||
52 | if (s == NULL && (s = *last) == NULL) | |
53 | return (NULL); | |
54 | ||
55 | /* | |
56 | * Skip (span) leading delimiters (s += strspn(s, delim), sort of). | |
57 | */ | |
58 | cont: | |
59 | c = *s++; | |
60 | for (spanp = (char *)delim; (sc = *spanp++) != 0;) { | |
61 | if (c == sc) | |
62 | goto cont; | |
63 | } | |
64 | ||
65 | if (c == 0) { /* no non-delimiter characters */ | |
66 | *last = NULL; | |
67 | return (NULL); | |
68 | } | |
69 | tok = s - 1; | |
70 | ||
71 | /* | |
72 | * Scan token (scan for delimiters: s += strcspn(s, delim), sort of). | |
73 | * Note that delim must have one NUL; we stop if we see that, too. | |
74 | */ | |
75 | for (;;) { | |
76 | c = *s++; | |
77 | spanp = (char *)delim; | |
78 | do { | |
79 | if ((sc = *spanp++) == c) { | |
80 | if (c == 0) | |
81 | s = NULL; | |
82 | else | |
83 | s[-1] = 0; | |
84 | *last = s; | |
85 | return (tok); | |
86 | } | |
87 | } while (sc != 0); | |
88 | } | |
89 | /* NOTREACHED */ | |
90 | } | |
91 | ||
92 | #endif /* !HAVE_STRTOK_R */ |