Annotation of prex/usr/lib/libc/string/strtok_r.c, Revision 1.1.1.1
1.1 nbrk 1: /* $NetBSD: strtok_r.c,v 1.9 2003/08/07 16:43:53 agc Exp $ */
2:
3: /*
4: * Copyright (c) 1988 Regents of the University of California.
5: * 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. Neither the name of the University nor the names of its contributors
16: * may be used to endorse or promote products derived from this software
17: * without specific prior written permission.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20: * 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 REGENTS OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <sys/cdefs.h>
33: #include <string.h>
34:
35: char *
36: strtok_r(s, delim, lasts)
37: char *s;
38: const char *delim;
39: char **lasts;
40: {
41: const char *spanp;
42: int c, sc;
43: char *tok;
44:
45: if (s == NULL && (s = *lasts) == NULL)
46: return (NULL);
47:
48: /*
49: * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
50: */
51: cont:
52: c = *s++;
53: for (spanp = delim; (sc = *spanp++) != 0;) {
54: if (c == sc)
55: goto cont;
56: }
57:
58: if (c == 0) { /* no non-delimiter characters */
59: *lasts = NULL;
60: return (NULL);
61: }
62: tok = s - 1;
63:
64: /*
65: * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
66: * Note that delim must have one NUL; we stop if we see that, too.
67: */
68: for (;;) {
69: c = *s++;
70: spanp = delim;
71: do {
72: if ((sc = *spanp++) == c) {
73: if (c == 0)
74: s = NULL;
75: else
76: s[-1] = 0;
77: *lasts = s;
78: return (tok);
79: }
80: } while (sc != 0);
81: }
82: /* NOTREACHED */
83: }
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