isnormal(3m) [sunos man page]
isnormal(3M) Mathematical Library Functions isnormal(3M) NAME
isnormal - test for a normal value SYNOPSIS
#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 rep- resented in a format wider than its semantic type is converted to its semantic type. Then determination is based on the type of the argu- ment. 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) SunOS 5.10 1 Nov 2003 isnormal(3M)
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fpclassify(3M) Mathematical Library Functions fpclassify(3M) NAME
fpclassify - classify real floating type SYNOPSIS
cc [ flag... ] file... -lm [ library... ] #include <math.h> int fpclassify(real-floating x); DESCRIPTION
The fpclassify() macro classifies its argument value as NaN, infinite, normal, subnormal, or zero. First, an argument represented in a for- mat wider than its semantic type is converted to its semantic type. Then classification is based on the type of the argument. RETURN VALUES
The fpclassify() macro returns the value of the number classification macro appropriate to the value of its argument. 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
isfinite(3M), isinf(3M), isnan(3M), isnormal(3M), math.h(3HEAD), signbit(3M), attributes(5), standards(5) SunOS 5.10 1 Sep 2002 fpclassify(3M)