-
Notifications
You must be signed in to change notification settings - Fork 0
/
parse.c
134 lines (120 loc) · 3.25 KB
/
parse.c
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
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* parse.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: ohakola <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/27 13:05:04 by ohakola #+# #+# */
/* Updated: 2020/08/31 20:21:57 by ohakola ### ########.fr */
/* */
/* ************************************************************************** */
#include "ft_printf.h"
/*
** Resets data after a spec and variable has been parsed and consumed.
*/
static int reset_var_data(t_printf *data)
{
data->left_justify = false;
data->pad_zeros = false;
data->show_sign = false;
data->blank_space = false;
data->has_precision = false;
data->zerox = false;
data->width = 0;
data->precision = 6;
data->middle_len = 0;
data->spec_len = 0;
data->var_len = 0;
data->type = length_none;
data->is_negative = false;
data->is_zero_res = false;
return (true);
}
/*
** Sets spec lengths information to be used in parse_input.
*/
static void set_spec_len(t_fmt_specs *lengths,
char *fmt, int i)
{
while (fmt[i] && is_sub_specifier(fmt[i]))
{
lengths->spec_len++;
i++;
}
if (fmt[i])
lengths->spec_len++;
else
lengths->spec_len = 0;
}
/*
** Parses lengths of middle and spec parts to be used in parse_input.
*/
static t_fmt_specs fmt_part_lengths(char *fmt, t_fmt_specs lengths)
{
int i;
char *next;
i = -1;
next = NULL;
while (fmt[++i])
if (fmt[i] == '%' && (next = fmt + i))
break ;
if (!next)
{
i = -1;
while (fmt[++i])
lengths.middle_len++;
return (lengths);
}
if (fmt && next && next - fmt > 0)
{
i = next - fmt;
lengths.middle_len = next - fmt;
}
i++;
set_spec_len(&lengths, fmt, i);
return (lengths);
}
/*
** Adds non-spec parts of fmt string to data->buffer.
*/
static int parse_middle(t_printf *data, char *fmt)
{
int i;
if (!(data->buffer = extend_str(data->buffer, data->len, data->middle_len)))
return (false);
i = -1;
while (++i < data->middle_len)
data->buffer[data->len + i] = fmt[i];
data->len += data->middle_len;
data->buffer[data->len] = '\0';
return (true);
}
/*
** Recursively parses fmt and fills data->buf with non-specs (middle) parts
** plus recognized variables already handled by the parsing of spec in fmt.
*/
int parse_input(t_printf *data, char *fmt)
{
t_fmt_specs l;
reset_var_data(data);
l = fmt_part_lengths(fmt, (t_fmt_specs){0, 0});
data->middle_len = l.middle_len;
data->spec_len = l.spec_len;
if (l.middle_len > 0)
{
if (!parse_middle(data, fmt))
return (false);
fmt += l.middle_len;
}
if (l.spec_len > 0)
{
if (!parse_spec_variable_pair(data, fmt + 1))
return (false);
fmt += l.spec_len + 1;
}
else if (*fmt == '%')
fmt += 1;
return (*fmt && (l.spec_len > 0 || l.middle_len > 0) ?
parse_input(data, fmt) : true);
}