42_libft/ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/09/27 11:44:12 by cchauvet          #+#    #+#             */
/*   Updated: 2022/09/28 16:40:24 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

void	*ft_memmove(void *dest, const void *src, size_t n)
{
	size_t	i;
	char	*tab1;
	char	*tab2;

	if (dest == NULL && src == NULL)
		return (dest);
	tab1 = dest;
	tab2 = (void *) src;
	if (tab1 < tab2)
		ft_memcpy(dest, src, n);
	else
	{
		i = n;
		while (0 < i)
		{
			i--;
			tab1[i] = tab2[i];
		}
	}
	return (dest);
}