/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_addr_to_str.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/22 16:54:09 by thrieg            #+#    #+#             */
/*   Updated: 2025/02/16 19:02:50 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

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

void	ft_convert_to_hexa(char c, char hex_buff[2])
{
	hex_buff[1] = c & 0b00001111;
	hex_buff[0] = (c >> 4) & 0b00001111;
	if (hex_buff[0] <= 9)
		hex_buff[0] += '0';
	else
		hex_buff[0] += 'a' - 10;
	if (hex_buff[1] <= 9)
		hex_buff[1] += '0';
	else
		hex_buff[1] += 'a' - 10;
}

//convert the address addr in hexadecimal and returns a standard c string.
//returns NULL if the allocation fails
char	*ft_addr_to_strhex(void *addr)
{
	char			hex_buff[2];
	int				i;
	int				j;
	uintptr_t		address;
	char			*ret;

	ret = malloc((sizeof(char) * sizeof(uintptr_t) * 2) + 1);
	if (!ret)
		return (NULL);
	address = (uintptr_t)addr;
	i = (sizeof(uintptr_t) * 8) - 8;
	j = 0;
	while (i >= 0)
	{
		ft_convert_to_hexa(((address >> i) & 0xFF), hex_buff);
		ret[j++] = hex_buff[0];
		ret[j++] = hex_buff[1];
		i -= 8;
	}
	ret[j] = '\0';
	return (ret);
}