1#include "stdio_impl.h"
2#include <limits.h>
3#include <errno.h>
4
5off_t __ftello_unlocked(FILE *f)
6{
7	off_t pos = f->seek(f, 0,
8		(f->flags & F_APP) && f->wpos > f->wbase
9		? SEEK_END : SEEK_CUR);
10	if (pos < 0) return pos;
11
12	/* Adjust for data in buffer. */
13	return pos - (f->rend - f->rpos) + (f->wpos - f->wbase);
14}
15
16off_t __ftello(FILE *f)
17{
18	off_t pos;
19	FLOCK(f);
20	pos = __ftello_unlocked(f);
21	FUNLOCK(f);
22	return pos;
23}
24
25long ftell(FILE *f)
26{
27	off_t pos = __ftello(f);
28	if (pos > LONG_MAX) {
29		errno = EOVERFLOW;
30		return -1;
31	}
32	return pos;
33}
34
35weak_alias(__ftello, ftello);
36
37LFS64(ftello);
38