ISNORMAL(3M) Mathematical Library Functions ISNORMAL(3M)
isnormal - test for a normal value
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isnormal(real-floating x);
The isnormal() macro determines whether its argument value is normal
(neither zero, subnormal, infinite, nor NaN). First, an argument
represented in a format wider than its semantic type is converted to
its semantic type. Then determination is based on the type of the
argument.
The isnormal() macro returns a non-zero value if and only if its
argument has a normal value.
No errors are defined.
See attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
math.h(3HEAD), fpclassify(3M), isfinite(3M), isinf(3M), isnan(3M),
signbit(3M), attributes(7), standards(7)
SunOS 5.11 July 12, 2006 ISNORMAL(3M)
NAME
isnormal - test for a normal value
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isnormal(real-floating x);
DESCRIPTION
The isnormal() macro determines whether its argument value is normal
(neither zero, subnormal, infinite, nor NaN). First, an argument
represented in a format wider than its semantic type is converted to
its semantic type. Then determination is based on the type of the
argument.
RETURN VALUES
The isnormal() macro returns a non-zero value if and only if its
argument has a normal value.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
math.h(3HEAD), fpclassify(3M), isfinite(3M), isinf(3M), isnan(3M),
signbit(3M), attributes(7), standards(7)
SunOS 5.11 July 12, 2006 ISNORMAL(3M)