Re: Building with Visual C++

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От
Magnus Hagander
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Re: Building with Visual C++
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6BCB9D8A16AC4241919521715F4D8BCEA352E5@algol.sollentuna.se
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Re: Building with Visual C++ "Dave Page" <dpage@vale-housing.co.uk>
Re: Building with Visual C++ Tom Lane <tgl@sss.pgh.pa.us>
> > *) Change where NaN is generated. Using 0.0/0.0 doesn't 
> work in VC++ 
> > because it detects it as a divide-by-zero at the compile stage.
> 
> If they're going to be that anally uncooperative, why don't 
> they have the required-by-C99-spec macro for NAN?  Or at 
> least some well-defined way to generate a NaN?

They do have one way that's documented on MSDN, which is:
unsigned long nan[2]={0xffffffff, 0x7fffffff};
double g = *( double* )nan;

I thought that was even uglier ;-), but I can change it to use that on
win32 if you prefer it?

//Magnus
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