1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 
24 #include <ast.h>
25 
26 #if _lib_memcpy
27 
28 NoN(memcpy)
29 
30 #else
31 
32 #undef	memcpy
33 
34 #if _lib_bcopy
35 
36 extern void	bcopy(void*, void*, size_t);
37 
38 void*
39 memcpy(void* s1, void* s2, size_t n)
40 {
41 	bcopy(s2, s1, n);
42 	return(s1);
43 }
44 
45 #else
46 
47 void*
48 memcpy(void* as1, const void* as2, register size_t n)
49 {
50 	register char*		s1 = (char*)as1;
51 	register const char*	s2 = (const char*)as2;
52 
53 	while (n-- > 0)
54 		*s1++ = *s2++;
55 	return(as1);
56 }
57 
58 #endif
59 
60 #endif
61