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ISNORMAL 3M "Jul 12, 2006" "SunOS 5.11" "Mathematical Library Functions"
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(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE ATTRIBUTE VALUE |
| Interface Stability Standard |
| MT-Level MT-Safe |
SEE ALSO
fpclassify(3M), isfinite(3M), isinf(3M), isnan(3M), math.h(3HEAD), signbit(3M), attributes(5), standards(5)