ft_printf/ft_printf.c at master · StToupin/ft_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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_printf.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: stoupin <marvin@42.fr>                     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2017/04/24 11:17:41 by stoupin           #+#    #+#             */
/*   Updated: 2017/04/24 14:07:45 by stoupin          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_printf.h"

t_assoc		g_assoc[N_ASSOC] = {
	{'%', &ft_print_percent},
	{'s', &ft_print_string},
	{'d', &ft_print_int},
	{'p', &ft_print_ptr},
	{'S', &ft_print_string_unicode},
	{'D', &ft_print_long_int},
	{'i', &ft_print_int},
	{'o', &ft_print_octal},
	{'O', &ft_print_long_octal},
	{'u', &ft_print_uint},
	{'U', &ft_print_ulong_int},
	{'x', &ft_print_hex},
	{'X', &ft_print_hex_uppercase},
	{'c', &ft_print_char},
	{'C', &ft_print_char_unicode},
	{'f', &ft_print_float},
	{'F', &ft_print_float},
	{'e', &ft_print_float_exp},
	{'E', &ft_print_float_bigexp}
};

static int	conversion_assoc(t_buf *buffer, va_list *ap,
	char conv_spec, t_par *p)
{
	int	i;
	int	found;
	int	len;

	len = 0;
	found = 0;
	i = 0;
	while (i < N_ASSOC)
	{
		if (g_assoc[i].conv_spec == conv_spec)
		{
			len = (*(g_assoc[i].f))(buffer, ap, p);
			found = 1;
		}
		i++;
	}
	if (!found)
		len = pad_left(buffer, p->width1, p->flags, 1)
			+ buf_putchar(buffer, conv_spec)
			+ pad_right(buffer, p->width1, p->flags, 1);
	return (len);
}

static void	read_params(const char *format, int *i, t_par *p, va_list *ap)
{
	char	c;
	char	c_next;
	int		advance;

	p->flags = 0;
	p->modifiers = 0;
	parse_flags(format, i, &(p->flags));
	parse_width(format, i, p, ap);
	advance = 1;
	while (advance > 0)
	{
		c = format[*i];
		c_next = format[*i + 1];
		advance = parse_modifier(c, c_next, &(p->modifiers));
		(*i) += advance;
	}
	parse_flags(format, i, &(p->flags));
}

static int	handle_conversion(t_buf *buffer, int *i,
	const char *format, va_list *ap)
{
	int		len;
	t_par	p;

	len = 0;
	if (format[*i] == '\0')
		return (0);
	(*i)++;
	read_params(format, i, &p, ap);
	if (format[*i] == '\0')
		len = 0;
	else
	{
		if (p.width2 >= 0 && format[*i] == 'd')
			p.flags &= ~FLAG_ZERO;
		if (p.flags & FLAG_PLUS)
			p.flags &= ~FLAG_SPACE;
		len = conversion_assoc(buffer, ap, format[*i], &p);
	}
	return (len);
}

static int	do_the_job(t_buf *buffer, const char *format, va_list *ap)
{
	int	i;
	int	pos;
	int	len;
	int	total;
	int	end;

	total = 0;
	pos = 0;
	end = 0;
	i = 0;
	while (!end)
	{
		if (format[i] == '%' || format[i] == '\0')
		{
			end = (format[i] == '\0');
			total += buf_write(buffer, &(format[pos]), i - pos);
			if ((len = handle_conversion(buffer, &i, format, ap)) == -1)
				return (-1);
			total += len;
			end = (format[i] == '\0');
			pos = i + 1;
		}
		i++;
	}
	return (total);
}

int			ft_printf(const char *format, ...)
{
	va_list	ap;
	t_buf	buffer;
	int		len;

	buffer.i = 0;
	va_start(ap, format);
	len = do_the_job(&buffer, format, &ap);
	if (len >= 0)
		buf_print(&buffer);
	return (len);
}