printf/ft_pointer.c at main · MQH-T/printf · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_pointer.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mtran <mtran@student.42.fr>                #+#  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025-12-06 15:34:49 by mtran             #+#    #+#             */
/*   Updated: 2025-12-06 15:34:49 by mtran            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
#include "ft_printf.h"

static int	ft_lowerhexalong(uintptr_t n)
{
	char	*str_base;
	int		i;

	i = 0;
	str_base = "0123456789abcdef";
	if (n >= 16)
		i += ft_lowerhexalong(n / 16);
	i += ft_putchar(str_base[n % 16]);
	return (i);
}

int	ft_pointer(unsigned long long ptr)
{
	int	count;

	count = 0;
	if (ptr == 0)
	{
		write(1, "(nil)", 5);
		return (5);
	}
	count += write(1, "0x", 2);
	count += ft_lowerhexalong(ptr);
	return (count);
}

// int main(void)
// {
//     int x;
//     int *y;
//     char *str;

//     x = 42;
//     y = &x;
//     str = "Hello";

//     printf("%p \n", &y);
//     x= ft_pointer(&y);
//     // x = ft_pointer(str);
//     // x = ft_pointer(NULL);
//     return (0);
// }