printf/ft_printf_hex.c at main · Syooosuke/printf · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf_hex.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: syokota <syokota@student.42tokyo.jp>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/05/13 18:50:48 by syokota           #+#    #+#             */
/*   Updated: 2026/05/16 14:07:06 by syokota          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

int	ft_printf_hex(unsigned int n, char convert)
{
	int		print_length;
	char	*base;
	int		error_check;

	print_length = 0;
	if (convert == 'x')
		base = "0123456789abcdef";
	else
		base = "0123456789ABCDEF";
	if (n >= 16)
	{
		error_check = ft_printf_hex(n / 16, convert);
		if (error_check == -1)
			return (-1);
		print_length += error_check;
	}
	error_check = ft_printf_char(base[n % 16]);
	if (error_check == -1)
		return (-1);
	print_length += error_check;
	return (print_length);
}

static int	ft_printf_hex_ptr(uintptr_t ptr)
{
	int		print_length;
	char	*base;
	int		error_check;

	base = "0123456789abcdef";
	print_length = 0;
	if (ptr >= 16)
	{
		error_check = ft_printf_hex_ptr(ptr / 16);
		if (error_check == -1)
			return (-1);
		print_length += error_check;
	}
	error_check = ft_printf_char(base[ptr % 16]);
	if (error_check == -1)
		return (-1);
	print_length += error_check;
	return (print_length);
}

int	ft_printf_ptr(void *ptr)
{
	int	print_length;
	int	error_check;

	print_length = 0;
	if (ptr == NULL)
	{
		error_check = ft_printf_str("(nil)");
		if (error_check == -1)
			return (-1);
		return (error_check);
	}
	error_check = ft_printf_str("0x");
	if (error_check == -1)
		return (-1);
	print_length += error_check;
	error_check = ft_printf_hex_ptr((uintptr_t)ptr);
	if (error_check == -1)
		return (-1);
	print_length += error_check;
	return (print_length);
}