/*
 * This file is part of the UCB release of Plan 9. It is subject to the license
 * terms in the LICENSE file found in the top-level directory of this
 * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
 * part of the UCB release of Plan 9, including this file, may be copied,
 * modified, propagated, or distributed except according to the terms contained
 * in the LICENSE file.
 */

#include	<u.h>
#include	<libc.h>

void*
jehanne_memmove(void *a1, const void *a2, size_t n)
{
	char *s1;
	const char *s2;

	if((int32_t)n < 0)
		abort();
	s1 = a1;
	s2 = a2;
	if((s2 < s1) && (s2+n > s1))
		goto back;
	while(n > 0) {
		*s1++ = *s2++;
		n--;
	}
	return a1;

back:
	s1 += n;
	s2 += n;
	while(n > 0) {
		*--s1 = *--s2;
		n--;
	}
	return a1;
}

void*
jehanne_memcpy(void *a1, const void *a2, size_t n)
{
	return jehanne_memmove(a1, a2, n);
}