opensolaris man page for isinf

isinf(3M)						  Mathematical Library Functions						 isinf(3M)

NAME
       isinf - test for infinity

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       int isinf(real-floating x);

DESCRIPTION
       The  isinf()  macro determines whether its argument value is an infinity (positive or negative). 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 isinf() macro returns a non-zero value if and only if its argument has an infinite 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), isnan(3M), isnormal(3M), math.h(3HEAD), signbit(3M), attributes(5), standards(5)

SunOS 5.11							    17 Nov 2008 							 isinf(3M)