libft101/ft_memmove.c at master · thperchi/libft101 · GitHub

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/* ************************************************************************** */
/*                                                          LE - /            */
/*                                                              /             */
/*   ft_memmove.c                                     .::    .:/ .      .::   */
/*                                                 +:+:+   +:    +:  +:+:+    */
/*   By: thperchi <marvin@le-101.fr>                +:+   +:    +:    +:+     */
/*                                                 #+#   #+    #+    #+#      */
/*   Created: 2018/07/10 04:05:25 by thperchi     #+#   ##    ##    #+#       */
/*   Updated: 2018/10/09 17:52:29 by thperchi    ###    #+. /#+    ###.fr     */
/*                                                         /                  */
/*                                                        /                   */
/* ************************************************************************** */

#include "libft.h"

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

	s = (unsigned char *)src;
	d = (unsigned char *)dst;
	if (s < d)
	{
		s = s + n - 1;
		d = d + n - 1;
		while (n > 0)
		{
			*d-- = *s--;
			n--;
		}
	}
	else
	{
		while (n > 0)
		{
			*d++ = *s++;
			n--;
		}
	}
	return (dst);
}