ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: selchoi <selchoi@student.42.kr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/12/26 19:01:35 by selchoi           #+#    #+#             */
/*   Updated: 2021/01/12 00:36:32 by selchoi          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!dst && !src)
		return (void *)0;
	d = (char *)dst;
	s = (char *)src;
	if (s > d)
	{
		while (len--)
			*d++ = *s++;
	}
	else
	{
		d += len;
		s += len;
		while (len--)
			*--d = *--s;
	}
	return (dst);
}