blob: 1a2afbbce3a62ef87f90c7093d11bd8f5369da84 (
plain) (
blame)
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
|
#include "stdio_impl.h"
#include <limits.h>
#include <errno.h>
off_t __ftello_unlocked(FILE *f)
{
off_t pos = f->seek(f, 0,
(f->flags & F_APP) && f->wpos != f->wbase
? SEEK_END : SEEK_CUR);
if (pos < 0) return pos;
/* Adjust for data in buffer. */
if (f->rend)
pos += f->rpos - f->rend;
else if (f->wbase)
pos += f->wpos - f->wbase;
return pos;
}
off_t __ftello(FILE *f)
{
off_t pos;
FLOCK(f);
pos = __ftello_unlocked(f);
FUNLOCK(f);
return pos;
}
long ftell(FILE *f)
{
off_t pos = __ftello(f);
if (pos > LONG_MAX) {
errno = EOVERFLOW;
return -1;
}
return pos;
}
weak_alias(__ftello, ftello);
weak_alias(ftello, ftello64);
|
