1 #include "irc.h"
2 IRCII_RCSID("@(#)$eterna: strsep.c,v 2.4 2019/01/15 07:44:06 mrg Exp $");
3
4 /* $NetBSD: strsep.c,v 1.13 2002/01/31 22:43:41 tv Exp $ */
5
6 /*-
7 * Copyright (c) 1990, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <assert.h>
36 #include <string.h>
37
38 #include "strsep.h"
39
40 /*
41 * Get next token from string *stringp, where tokens are possibly-empty
42 * strings separated by characters from delim.
43 *
44 * Writes NULs into the string at *stringp to end tokens.
45 * delim need not remain constant from call to call.
46 * On return, *stringp points past the last NUL written (if there might
47 * be further tokens), or is NULL (if there are definitely no more tokens).
48 *
49 * If *stringp is NULL, strsep returns NULL.
50 */
51 u_char *
my_strsep(u_char ** stringp,const u_char * delim)52 my_strsep(u_char **stringp, const u_char *delim)
53 {
54 u_char *s;
55 const u_char *spanp;
56 int c, sc;
57 u_char *tok;
58
59 if ((s = *stringp) == NULL)
60 return (NULL);
61 for (tok = s;;) {
62 c = *s++;
63 spanp = delim;
64 do {
65 if ((sc = *spanp++) == c) {
66 if (c == 0)
67 s = NULL;
68 else
69 s[-1] = 0;
70 *stringp = s;
71 return (tok);
72 }
73 } while (sc != 0);
74 }
75 /* NOTREACHED */
76 }
77