Re: Type-error in C code

[Jan Djärv]

Thien-Thi Nguyen skrev 2010-11-12 22.15:
> () Jan Djärv<address@hidden>
> () Fri, 12 Nov 2010 16:12:17 +0100
>
>     An Atom is 32 bits.
>
> ... with the top 3 bits guaranteed to be zero
> (X Windows System Protocol, section 3. Common Types).
>
> In this Emacs, ‘most-positive-fixnum’ is 536870911,
> i.e., #x1fffffff, i.e., 29 1s.
>
> Coincidence?

Interesting.  Maybe they used those bits as a type indictor at one point. 
Looking at the X source now, I can't find any reson for this.

However, I fixed the code to use make_fixnum_or_float anyway.  In the future 
somebody may come along and wonder why a 32-bit number is put in a Lisp integer.

        Jan D.