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memccpy.c revision 1.1.1.2 
      1      1.1    cgd /*-
      2  1.1.1.2  perry  * Copyright (c) 1990, 1993
      3  1.1.1.2  perry  *	The Regents of the University of California.  All rights reserved.
      4      1.1    cgd  *
      5      1.1    cgd  * Redistribution and use in source and binary forms, with or without
      6      1.1    cgd  * modification, are permitted provided that the following conditions
      7      1.1    cgd  * are met:
      8      1.1    cgd  * 1. Redistributions of source code must retain the above copyright
      9      1.1    cgd  *    notice, this list of conditions and the following disclaimer.
     10      1.1    cgd  * 2. Redistributions in binary form must reproduce the above copyright
     11      1.1    cgd  *    notice, this list of conditions and the following disclaimer in the
     12      1.1    cgd  *    documentation and/or other materials provided with the distribution.
     13      1.1    cgd  * 3. All advertising materials mentioning features or use of this software
     14      1.1    cgd  *    must display the following acknowledgement:
     15      1.1    cgd  *	This product includes software developed by the University of
     16      1.1    cgd  *	California, Berkeley and its contributors.
     17      1.1    cgd  * 4. Neither the name of the University nor the names of its contributors
     18      1.1    cgd  *    may be used to endorse or promote products derived from this software
     19      1.1    cgd  *    without specific prior written permission.
     20      1.1    cgd  *
     21      1.1    cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22      1.1    cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23      1.1    cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24      1.1    cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25      1.1    cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26      1.1    cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27      1.1    cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28      1.1    cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29      1.1    cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30      1.1    cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31      1.1    cgd  * SUCH DAMAGE.
     32      1.1    cgd  */
     33      1.1    cgd 
     34      1.1    cgd #if defined(LIBC_SCCS) && !defined(lint)
     35  1.1.1.2  perry static char sccsid[] = "@(#)memccpy.c	8.1 (Berkeley) 6/4/93";
     36      1.1    cgd #endif /* LIBC_SCCS and not lint */
     37      1.1    cgd 
     38      1.1    cgd #include <sys/cdefs.h>
     39      1.1    cgd #include <string.h>
     40      1.1    cgd 
     41      1.1    cgd void *
     42      1.1    cgd memccpy(t, f, c, n)
     43      1.1    cgd 	void *t;
     44      1.1    cgd 	const void *f;
     45      1.1    cgd 	int c;
     46      1.1    cgd 	register size_t n;
     47      1.1    cgd {
     48      1.1    cgd 
     49      1.1    cgd 	if (n) {
     50      1.1    cgd 		register unsigned char *tp = t;
     51      1.1    cgd 		register const unsigned char *fp = f;
     52      1.1    cgd 		do {
     53  1.1.1.2  perry 			if ((*tp++ = *fp++) == c)
     54      1.1    cgd 				return (t);
     55      1.1    cgd 		} while (--n != 0);
     56      1.1    cgd 	}
     57      1.1    cgd 	return (0);
     58      1.1    cgd }
     59