fpclassify man page on HP-UX

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fpclassify(3M)							fpclassify(3M)

NAME
       fpclassify() - floating-point value classification macro

SYNOPSIS
       floating-type

DESCRIPTION
       The  macro  classifies its argument value as NaN, infinite, normalized,
       denormalized, or zero.  The argument must  be  of  floating  type,  and
       classification  is based on the type of the argument.  For HP Integrity
       servers, the argument can be any floating type.	For PA-RISC, the argu‐
       ment must be either or

       The  macro,  used in conjunction with the macro, replaces the and func‐
       tions, which are obsolete and are no longer supported.

USAGE
       To use the macro, compile either with the default option	 or  with  the
       and  options.  Make sure your program includes Link in the math library
       by specifying on the compiler or linker command line.

RETURN VALUE
       The macro returns the value of the number classification	 macro	appro‐
       priate to the type and value of its argument.

       The value returned is one of the following macros, which are defined in

       Every  possible	argument  value falls into one of these categories, so
       this macro never results in an error.

       The macro raises no exceptions.

ERRORS
       No errors are defined.

EXAMPLES
       Take certain actions if is either a denormalized value or zero:

SEE ALSO
       isfinite(3M), isinf(3M), isnan(3M), isnormal(3M), signbit(3M), math(5).

STANDARDS CONFORMANCE
								fpclassify(3M)
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