xref: /titanic_50/usr/src/lib/libast/common/comp/memccpy.c (revision 10d63b7db37a83b39c7f511cf9426c9d03ea0760)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                  Common Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
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_memccpy && !_UWIN
27 
28 NoN(memccpy)
29 
30 #else
31 
32 /*
33  * Copy s2 to s1, stopping if character c is copied. Copy no more than n bytes.
34  * Return a pointer to the byte after character c in the copy,
35  * or 0 if c is not found in the first n bytes.
36  */
37 
38 void*
39 memccpy(void* as1, const void* as2, register int c, size_t n)
40 {
41 	register char*		s1 = (char*)as1;
42 	register const char*	s2 = (char*)as2;
43 	register const char*	ep = s2 + n;
44 
45 	while (s2 < ep)
46 		if ((*s1++ = *s2++) == c)
47 			return(s1);
48 	return(0);
49 }
50 
51 #endif
52