Printf/ft_printf_ptr.c at main · codebit-hub/Printf · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf_ptr.c                                    :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dporhomo <dporhomo@student.42prague.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/03 23:47:57 by dporhomo          #+#    #+#             */
/*   Updated: 2025/12/09 10:29:46 by dporhomo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

static char	*ft_ptoa(unsigned long n);
static void	ft_fill_ptr(char *str, unsigned long n, int len);
static int	ft_format_ptr(char *str, t_flags flags);

int	ft_print_ptr(unsigned long n, t_flags flags)
{
	char	*str;
	int		count;

	if (!n)
	{
		flags.precision = -1;
		return (ft_print_str(PTRNULL, flags));
	}
	str = ft_ptoa(n);
	if (!str)
		return (0);
	count = ft_format_ptr(str, flags);
	free(str);
	return (count);
}

static int	ft_format_ptr(char *str, t_flags flags)
{
	int	count;
	int	len;

	count = 0;
	len = ft_strlen(str) + 2;
	if (flags.left == 0)
		count += ft_print_padding(flags.width, len, 0);
	count += write(1, "0x", 2);
	count += write(1, str, ft_strlen(str));
	if (flags.left == 1)
		count += ft_print_padding(flags.width, len, 0);
	return (count);
}

static char	*ft_ptoa(unsigned long n)
{
	char			*str;
	int				len;
	unsigned long	temp;

	len = 0;
	if (n == 0)
		len = 1;
	temp = n;
	while (temp > 0)
	{
		temp /= 16;
		len++;
	}
	str = (char *)malloc(sizeof(char) * (len + 1));
	if (!str)
		return (NULL);
	ft_fill_ptr(str, n, len);
	return (str);
}

static void	ft_fill_ptr(char *str, unsigned long n, int len)
{
	char	*base;

	base = "0123456789abcdef";
	str[len] = '\0';
	if (n == 0)
		str[0] = '0';
	while (n > 0)
	{
		str[--len] = base[n % 16];
		n /= 16;
	}
}