| ISFINITE(3) | Library Functions Manual | ISFINITE(3) |
isfinite — test
for finite value
Standard C Library (libc, -lc)
#include
<math.h>
int
isfinite(real-floating
x);
The
isfinite()
determines whether its argument x has a finite value.
An argument represented in a format wider than its semantic type is
converted to its semantic type first. The determination is then based on the
type of the argument.
It is determined whether the value of x is zero, subnormal, or normal, and neither infinite nor NaN.
It is determined whether the value of x is true zero or finite, and neither dirty zero nor ROP.
The isfinite() macro returns a non-zero
value if the value of x is finite. Otherwise 0 is
returned.
No errors are defined.
The isfinite() macro conforms to
ISO/IEC 9899:1999
(“ISO C99”).
| August 6, 2011 | NetBSD 11.0 |