ft_memcpy.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcpy.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: imunaev- <imunaev-@student.hive.fi>        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/01 10:40:38 by imunaev-          #+#    #+#             */
/*   Updated: 2025/01/18 12:37:57 by imunaev-         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/**
 * @brief Copies bytes from one memory area to another.
 *
 * This function copies `n` bytes from the memory area pointed to by `src`
 * to the memory area pointed to by `dest`. The memory areas must not overlap.
 *
 * @param dest Pointer to the destination memory area.
 * @param src Pointer to the source memory area.
 * @param n The number of bytes to copy.
 * @return void* A pointer to the destination memory area `dest`.
 *         Returns a pointer to a newly allocated memory block if both
 *         `dest` and `src` are NULL.
 */
void	*ft_memcpy(void *dest, const void *src, size_t n)
{
	const unsigned char	*s;
	unsigned char		*d;

	if (!dest && !src)
		return (malloc(0));
	d = (unsigned char *)dest;
	s = (const unsigned char *)src;
	while (n > 0)
	{
		*d++ = *s++;
		n--;
	}
	return (dest);
}