ft_memmove.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memmove.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: gargrigo <gargrigo@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/02/06 16:57:36 by gargrigo          #+#    #+#             */
/*   Updated: 2026/02/06 16:57:38 by gargrigo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include <stddef.h>

static void	helper(const unsigned char *s, unsigned char *d, size_t n)
{
	size_t	i;

	i = 0;
	if (d < s)
	{
		while (i < n)
		{
			d[i] = s[i];
			i++;
		}
	}
	else
	{
		i = n;
		while (i > 0)
		{
			d[i - 1] = s[i - 1];
			i--;
		}
	}
}

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

	if (n == 0 || dest == src)
		return (dest);
	d = (unsigned char *)dest;
	s = (const unsigned char *)src;
	helper(s, d, n);
	return (dest);
}