blob: b4584a896d3e0190c88049a9bebfeb26c48916ed (
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
|
/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <math.h>
#include <limits.h>
#include <errno.h>
long
lroundl (long double x)
{
long double res;
if (x >= 0.0L)
{
res = ceill (x);
if (res - x > 0.5L)
res -= 1.0;
}
else
{
res = ceill (-x);
if (res + x > 0.5L)
res -= 1.0L;
res = -res;
}
if (!isfinite (res)
|| res > (long double)LONG_MAX
|| res < (long double)LONG_MIN)
{
errno = ERANGE;
/* Undefined behaviour, so we could return anything. */
/* return res > 0.0L ? LONG_MAX : LONG_MIN; */
}
return (long) res;
}
|
