ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bmetehri <bmetehri@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/07 17:31:45 by bmetehri          #+#    #+#             */
/*   Updated: 2023/01/05 19:27:41 by bmetehri         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	i = 0;
	if (!dest && !src)
		return (NULL);
	if (src == dest && !n)
		return (dest);
	if (src + n <= dest || dest + n <= src)
		return (ft_memcpy(dest, src, n));
	if (src > dest)
	{
		while (++i - 1 < n)
			*((char *)dest + (i - 1)) = *((char *)src + (i - 1));
	}
	else
	{
		while (n > 0)
		{
			*((char *)dest + n - 1) = *((char *)src + n - 1);
			n--;
		}
	}
	return (dest);
}