libbackup/ft_memmove.c at master · Wouterbeets/libbackup · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: wbeets <wbeets@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2015/03/20 11:56:57 by wbeets            #+#    #+#             */
/*   Updated: 2015/03/20 11:56:57 by wbeets           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

void	*ft_memmove(void *s1, const void *s2, size_t n)
{
	size_t	i;

	if (!((int *)s1 > (int *)s2 && (int *)s2 + n > (int *)s1))
		ft_memcpy(s1, s2, n);
	else
	{
		i = n;
		while (i > 0)
		{
			i--;
			*((char *)s1 + i) = *((char *)s2 + i);
		}
	}
	return (s1);
}