Re: More C

[Keith Thompson <kst@cts.com>]

Jan Kroken <jankr@nntp.ifi.uio.no> writes:
[...]
> What if the compiler decides to optimize access to the record,
> so the real memory structure becomes as follows?
> 
> for SDL_Color use
>    record
>      Red   at 0  range 0..7;
>      Green at 32 range 32..39;
>      Blue  at 64 range 64..71;
>    end record;
> for SDL_Color'Size use 128;

You should be able to use pragma Convention(C, SDL_Color); it's then
up to the Ada compiler to lay out the record the same way the C
compiler does.

If it doesn't do this properly, you may have to resort to record
representation clauses, or perhaps to an implementation-defined
pragma.

-- 
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.