memccpy.c revision da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2007 AT&T Knowledge Ventures *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Knowledge Ventures *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#include <ast.h>
#if _lib_memccpy && !_UWIN
NoN(memccpy)
#else
/*
* Copy s2 to s1, stopping if character c is copied. Copy no more than n bytes.
* Return a pointer to the byte after character c in the copy,
* or 0 if c is not found in the first n bytes.
*/
void*
memccpy(void* as1, const void* as2, register int c, size_t n)
{
register char* s1 = (char*)as1;
register const char* s2 = (char*)as2;
register const char* ep = s2 + n;
while (s2 < ep)
if ((*s1++ = *s2++) == c)
return(s1);
return(0);
}
#endif