[Haskell-cafe] Re: FFI to double constants, printf

[Brandon S. Allbery KF8NH]

On Jul 17, 2009, at 22:27 , Maurí cio wrote:
> Is there maybe some way to check if a double or
> long double do have a "proper" value?


isNaN :: a -> Bool
True if the argument is an IEEE "not-a-number" (NaN) value

isInfinite :: a -> Bool
True if the argument is an IEEE infinity or negative infinity

isDenormalized :: a -> Bool
True if the argument is too small to be represented in normalized format

isNegativeZero :: a -> Bool
True if the argument is an IEEE negative zero

isIEEE :: a -> Bool
True if the argument is an IEEE floating point number

(in Prelude, even.  Class RealFloat)

-- 
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


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