[cmucl-imp] [cmucl-help] NaN

[Marco Antoniotti]

> 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