[cmucl-imp] [cmucl-help] NaN
Marco Antoniotti
marcoxa at cs.nyu.edu
Thu Jan 12 10:11:39 UTC 2017
> On Jan 11, 2017, at 17:14 , Raymond Toy <toy.raymond at gmail.com> wrote:
>
>>>>>> "james" == james anderson <james.anderson at setf.de> writes:
>
> james> good morning;
>>> On 2017-01-11, at 09:48, Marco Antoniotti <marcoxa at cs.nyu.edu> wrote:
>>>
>>> Thank you James, thank you Stelian.
>>>
>>> The CFFI solution seems very interesting and the codec James pointed me to are also useful.
>
> james> i sent marco an off-line note, in which i had pointed out some code which figures (among other things) in an amqp implementation, where it is figures in buffer codecs.
> james> for the curious, it is to be found here:
>
> james> https://github.com/lisp/de.setf.utility/tree/master/codecs/float-codecs.lisp
>
> This is also pretty nice and mostly portable. I think with a bit of
> work it can be made (almost) completely portable using just CL
> functions. I guess the main problem is constructing infinities.
> Testing for NaN is pretty easy: (= x x) is always false if x is NaN.
Do you have an idea about how to go ahead and construct infinities?
MA
--
Marco Antoniotti
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