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 _memcpy; So we
37 * need to make sure that the correct symbol exists for these calls.
38 */
39 #pragma weak _memcpy = memcpy
40
41 #include <sys/types.h>
42
43 #if defined(_KERNEL)
44 #include <sys/systm.h>
45 #elif !defined(_BOOT)
46 #include <stddef.h>
47 #include <string.h>
48 #endif
49
50 #include "memcpy.h"
51
52 /*
53 * Copy s0 to s, always copy n bytes.
54 * Return s
55 */
56 void *
memcpy(void * s,const void * s0,size_t n)57 memcpy(void *s, const void *s0, size_t n)
58 {
59 if (n != 0) {
60 char *s1 = s;
61 const char *s2 = s0;
62
63 do {
64 *s1++ = *s2++;
65 } while (--n != 0);
66 }
67 return (s);
68 }
69