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__fpclassifyd

Syntax

 
#include <math.h>

int __fpclassifyd(double);

Description

Returns the kind of the floating point value supplied. You should use the type generic macro fpclassify (see section fpclassify) instead of this function.

Return Value

FP_INFINITE, FP_NAN, FP_NORMAL, FP_SUBNORMAL or FP_ZERO.

Portability

ANSI/ISO C C99; not C89

Example

 
if( __fpclassifyd(0.0) != FP_ZERO )
{
  printf("Something is wrong with the implementation!\n");
}


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  Copyright 2004   by DJ Delorie     Updated Apr 2004