blob: 4fde05ba54ae22ade9292952159562b611a6d049 (
plain)
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
|
/* The original code is public domain -- Will Hartung 4/9/09 */
/* Modifications, public domain as well, by Antti Haapala, 11/10/17 */
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
ssize_t _getline(char **lineptr, size_t *n, FILE *stream,
int (*fgetc_impl)(FILE*)) {
size_t pos;
int c;
if (lineptr == NULL || stream == NULL || n == NULL) {
errno = EINVAL;
return -1;
}
c = fgetc_impl(stream);
if (c == EOF) {
return -1;
}
if (*lineptr == NULL) {
*lineptr = malloc(128);
if (*lineptr == NULL) {
return -1;
}
*n = 128;
}
pos = 0;
while(c != EOF) {
if (pos + 1 >= *n) {
char *new_ptr;
size_t new_size = *n + (*n >> 2);
if (new_size < 128) {
new_size = 128;
}
new_ptr = realloc(*lineptr, new_size);
if (new_ptr == NULL) {
return -1;
}
*n = new_size;
*lineptr = new_ptr;
}
((unsigned char *)(*lineptr))[pos ++] = c;
if (c == '\n') {
break;
}
c = fgetc_impl(stream);
}
(*lineptr)[pos] = '\0';
return pos;
}
|
