1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
29
30
31 #include <sys/types.h>
32 #if defined(_KERNEL)
33 #include <sys/systm.h>
34 #else
35 #include <string.h>
36 #include <stddef.h>
37 #endif
38
39 /*
40 * Return the ptr in sptr at which the character c1 appears;
41 * or NULL if not found in n chars; don't stop at \0.
42 */
43 void *
memchr(const void * sptr,int c1,size_t n)44 memchr(const void *sptr, int c1, size_t n)
45 {
46 if (n != 0) {
47 unsigned char c = (unsigned char)c1;
48 const unsigned char *sp = sptr;
49
50 do {
51 if (*sp++ == c)
52 return ((void *)--sp);
53 } while (--n != 0);
54 }
55 return (NULL);
56 }
57