opensolaris man page for fpclassify

fpclassify(3M)						  Mathematical Library Functions					    fpclassify(3M)

NAME
       fpclassify - classify real floating type

SYNOPSIS
       c99 [ 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 5.11							    12 Jul 2006 						    fpclassify(3M)