ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: alalaoui <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/04/18 18:30:27 by alalaoui          #+#    #+#             */
/*   Updated: 2017/04/27 18:11:09 by alalaoui         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
#include <string.h>
#include <stdlib.h>

void				*ft_memmove(void *dst, const void *src, size_t len)
{
	unsigned char	*d;
	unsigned char	*s;

	d = (unsigned char*)dst;
	s = (unsigned char*)src;
	if (!len || s == d)
		return (dst);
	if (d < s)
		ft_memcpy(dst, src, len);
	else
	{
		d = d + len;
		s = s + len;
		while (len--)
			*--d = *--s;
	}
	return (dst);
}