ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: juhagon <juhagon@student.42madrid.com>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/04 10:35:32 by juhagon           #+#    #+#             */
/*   Updated: 2022/01/25 09:56:13 by juhagon          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	d = dst;
	s = (char *)src;
	if (dst == 0 && src == 0)
		return (NULL);
	if (d < s)
		while (len--)
			*d++ = *s++;
	else
	{
		lasts = s + (len - 1);
		lastd = d + (len - 1);
		while (len--)
			*lastd-- = *lasts--;
	}
	return (dst);
}