pickle broken: can't handle NaN or Infinity under win32

Grant Edwards grante at visi.com
Wed Jun 22 22:54:06 EDT 2005

On 2005-06-23, Paul Rubin <http> wrote:
> Scott David Daniels <Scott.Daniels at Acm.Org> writes:
>> >>>Negative 0 isn't a NaN, it's just negative 0.
>> >>
>> >>Right, but it is hard to construct in standard C.
>> > Huh?  It's just a hex constant.
>> Well, -0.0 doesn't work, and (double)0x80000000 doesn't work,
>> and.... I think you have to use quirks of a compiler to create
>> it.  And I don't know how to test for it either, x < 0.0 is
>> not necessarily true for negative 0.
> Aren't we talking about IEEE 754 arithmetic?

Mainly, yes.

> There's some specific bit pattern(s) for -0.0 and you can
> assign a float variable to such a pattern.


Grant Edwards                   grante             Yow!  My Aunt MAUREEN was
                                  at               a military advisor to IKE &
                               visi.com            TINA TURNER!!

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