Re: Overlay allowability

[Keith Thompson <kst@cts.com>]

Tucker Taft <stt@averstar.com> writes:
> "Marc A. Criley" wrote:
[...]
> >   N : Natural;
> > 
> >   SN : Stream_Element_Array(1..N'Size / System.Storage_Unit);
> >   for SN'Address use N;
> 
> I presume you meant:  for SN'Address use N'Address.
> 
> Also, N'Size/System.Storage_Unit is not what you want, probably.  
> More likely is:
>     (N'Size + System.Storage_Unit - 1)/System.Storage_Unit
> 
> I.e., round the division up.
> 
> N'Size is probably going to be 31 on your typical 32-bit computer.

Actually, I think N'Size is more likely to be 32, though Natural'Size
is likely to be 31.  A standalone object (like N in the example) is
almost certain to occupy a whole number of storage units, and to be
aligned on a storage-unit boundary.

-- 
Keith Thompson (The_Other_Keith) kst@cts.com  <http://www.ghoti.net/~kst>
San Diego Supercomputer Center           <*>  <http://www.sdsc.edu/~kst>
Welcome to the last year of the 20th century.