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
|
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* get_next_line.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/03/15 14:13:51 by dkaiser #+# #+# */
/* Updated: 2024/03/25 12:23:41 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "get_next_line.h"
char *str_add_buffer(char *old_str, char *buf, int pos, int buf_len)
{
char *result;
int len;
int i;
if (!old_str)
len = buf_len;
else
len = ft_strlen(old_str) + buf_len;
result = malloc(sizeof(char) * (len + 1));
if (!result)
return (NULL);
result[len] = '\0';
i = 0;
while (old_str && old_str[i])
{
result[i] = old_str[i];
i++;
}
while (i < len)
result[i++] = buf[pos++];
return (result);
}
void get_next_line_rec(int fd, char *buf, char **ptr_result, int pos)
{
int len;
int i;
char *old_res;
char *result;
int readlen;
result = *ptr_result;
readlen = 0;
len = 0;
while (pos + len < BUFFER_SIZE)
{
if (buf[pos + len] == '\n')
{
len++;
break ;
}
if (!buf[pos + len])
break ;
len++;
}
old_res = result;
result = str_add_buffer(old_res, buf, pos, len);
*ptr_result = result;
free(old_res);
if (pos + len == BUFFER_SIZE && buf[BUFFER_SIZE - 1] == '\n')
{
while (pos < BUFFER_SIZE)
buf[pos++] = '\0';
return ;
}
if (!result)
return ;
i = 0;
while (i < len)
buf[pos + i++] = '\0';
if (pos + len == BUFFER_SIZE)
{
readlen = read(fd, buf, BUFFER_SIZE);
if (readlen < 0)
{
i = 0;
while (i < BUFFER_SIZE)
buf[i++] = '\0';
free(result);
*ptr_result = NULL;
return ;
}
if (readlen > 0)
get_next_line_rec(fd, buf, &result, 0);
}
*ptr_result = result;
}
char *get_next_line(int fd)
{
static char buf[BUFFER_SIZE];
int i;
char *result;
int readlen;
i = 0;
readlen = 0;
result = NULL;
while (i < BUFFER_SIZE && !buf[i])
i++;
if (i == BUFFER_SIZE)
{
readlen = read(fd, buf, BUFFER_SIZE);
if (readlen < 0)
{
i = 0;
while (i < BUFFER_SIZE)
buf[i++] = '\0';
return (NULL);
}
if (readlen > 0)
return (get_next_line(fd));
return (NULL);
}
get_next_line_rec(fd, buf, &result, i);
return (result);
}
|
