Re: EMACS_INT cleanup

[Lars Magne Ingebrigtsen]

Stefan Monnier <address@hidden> writes:

> What's wrong with ptrdiff_t?

In principle, that's the best thing.  However:

grep -nH -e SPECPDL_INDEX *.c
alloc.c:4849:  int count = SPECPDL_INDEX ();
alloc.c:4877:  int count = SPECPDL_INDEX ();
buffer.c:1405:    int count = SPECPDL_INDEX ();
buffer.c:1680:  count = SPECPDL_INDEX ();
buffer.c:3807:  int count = SPECPDL_INDEX ();
buffer.c:3916:  int count = SPECPDL_INDEX ();
bytecode.c:408:  int count = SPECPDL_INDEX ();
[165 lines removed]

Isn't the SPECPDL thing for building a backtrace strack?  The
specbinding structure is 16 bytes, and I'm assuming that it's organised
as a, er, stack.  So having this be more than 31 bits will require a
recursion that goes deeper than the moon has atoms.  (Well, ok.  That's
a slight exaggeration.  I admit it.)

Of course, I've probably totally misunderstood how is works after
spending several seconds reading the comment about it in lisp.h.

-- 
(domestic pets only, the antidote for overdose, milk.)
  address@hidden * Lars Magne Ingebrigtsen