Annotation of prex-old/usr/lib/libc/string/strsep.c, Revision 1.1.1.1
1.1 nbrk 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. Neither the name of the University nor the names of its contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #include <sys/cdefs.h>
31: #include <string.h>
32: #include <stdio.h>
33:
34: /*
35: * Get next token from string *stringp, where tokens are possibly-empty
36: * strings separated by characters from delim.
37: *
38: * Writes NULs into the string at *stringp to end tokens.
39: * delim need not remain constant from call to call.
40: * On return, *stringp points past the last NUL written (if there might
41: * be further tokens), or is NULL (if there are definitely no more tokens).
42: *
43: * If *stringp is NULL, strsep returns NULL.
44: */
45: char *
46: strsep(stringp, delim)
47: char **stringp;
48: const char *delim;
49: {
50: char *s;
51: const char *spanp;
52: int c, sc;
53: char *tok;
54:
55: if ((s = *stringp) == NULL)
56: return (NULL);
57: for (tok = s;;) {
58: c = *s++;
59: spanp = delim;
60: do {
61: if ((sc = *spanp++) == c) {
62: if (c == 0)
63: s = NULL;
64: else
65: s[-1] = 0;
66: *stringp = s;
67: return (tok);
68: }
69: } while (sc != 0);
70: }
71: /* NOTREACHED */
72: }
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