Re: [PATCH 1/2] math.h: declare isinfl, isnanl for Cygwin

[Corinna Vinschen <vinschen at redhat dot com>]

On Apr  1 21:26, Gregory Pietsch wrote:
> isnan and isinf are macros, not functions, so they should work on long
> doubles.
> 
> Something like:
> #define isnan(_X) (fpclassify(_X)==FP_NAN)
> #define isinf(_X) (fpclassify(_X)==FP_INFINITE)

These are the C99 macros and those are already available in math.h.

The functions isnan{f,l}, isinf{f,l} and finite{f,l} are BSD and SVID
implementations, outdated but should be available for compatibility's
sake.

> While we're at it, could we add isfinitel and isnormall too?

Neither an isfinitel nor an isnormall exist anywhere.  There are only
the float type agnostic C99 macros isfinite and isnormal, plus the
BSD/SVID-style functions mentioned above.


Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat

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