infnan()?

[Stuart Marshall <marshall@sioux.llnl.gov>]

Hi,

I would like to use NaN's.  It appears that isnan()
works as advertised so I can check for NaN.  However,
there is a man page for infnan() but no such function
appears to be available.  Does anyone know the proper
way to generate a NaN value?  (I am using NaN as an
initialization value so that I can check that a valid
value is used later.)  For the moment I am using NAN
as defined in nan.h but it requires the use of
"#define _GNU_SOURCE 1".  I would like to keep the code
somewhat portable.

thanks,
Stuart


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