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
|
/* Copyright (C) 2015 by Red Hat, Incorporated. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*/
/* finitel(x) returns 1 is x is finite, else 0; */
#include <math.h>
int
finitel (long double x)
{
#ifdef _LDBL_EQ_DBL
return finite (x);
#else
/* Let the compiler do this for us.
Note - we do not know how many bits there are in a long double.
Some architectures for example have an 80-bit long double whereas
others use 128-bits. We use macros and comiler builtin functions
to avoid specific knowledge of the long double format. */
return __builtin_isfinite (x);
#endif
}
|
