libft/ft_memcpy.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcpy.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/15 13:38:05 by kcolin            #+#    #+#             */
/*   Updated: 2024/10/22 12:03:47 by kcolin           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"
#include <stdlib.h>

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

	if ((dest == NULL || src == NULL) && n > 0)
		return (dest);
	i = 0;
	while (i < n)
	{
		((char *)dest)[i] = ((char *)src)[i];
		i++;
	}
	return (dest);
}

/*
#include <string.h>
#include <stdio.h>
#include "libft.h"

int	main(void)
{
	char	dest[20] = "AAAAAAAAAAAAAAAAAAA";
	char	src[20] = "Hello there";
	int		i;

	printf("%p\n", ft_memcpy(dest, src, 0));
	i = 0;
	while (i < 20)
	{
		printf("%d\t%c\n", dest[i], dest[i]);
		i++;
	}
	printf("%p\n", ft_memcpy(dest, src, 15));
	i = 0;
	while (i < 20)
	{
		printf("%d\t%c\n", dest[i], dest[i]);
		i++;
	}
	printf("%p\n", memcpy(dest, src, 15));
	i = 0;
	while (i < 20)
	{
		printf("%d\t%c\n", dest[i], dest[i]);
		i++;
	}
	printf("\n");
	printf("%p\n", ft_memcpy(NULL, NULL, 15));
}
*/