xref: /illumos-gate/usr/src/common/util/memset.c (revision edb348833aaacfa1176e502ad38875fd0b2717ab)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 /*	Copyright (c) 1988 AT&T	*/
27 /*	  All Rights Reserved  	*/
28 
29 #if !defined(_KMDB) && !defined(_BOOT) && !defined(_KERNEL)
30 
31 #include "lint.h"
32 
33 #endif /* !_KMDB && !_BOOT && !_KERNEL */
34 
35 /*
36  * The SunStudio compiler may generate calls to _memset; So we
37  * need to make sure that the correct symbol exists for these calls.
38  */
39 #pragma weak _memset = memset
40 
41 #include <sys/types.h>
42 
43 #if defined(_KERNEL)
44 #include <sys/systm.h>
45 #elif !defined(_BOOT)
46 #include <string.h>
47 #endif
48 
49 #include "string.h"
50 
51 /*
52  * Set an array of n chars starting at sp to the character c.
53  * Return sp.
54  */
55 void *
56 memset(void *sp1, int c, size_t n)
57 {
58 	if (n != 0) {
59 		unsigned char *sp = sp1;
60 		do {
61 			*sp++ = (unsigned char)c;
62 		} while (--n != 0);
63 	}
64 
65 	return (sp1);
66 }
67