opensolaris man page for isnormal

isnormal(3M)						  Mathematical Library Functions					      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 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 5.11							    12 Jul 2006 						      isnormal(3M)