Re: Ada Address = C pointer ?

["Matthew Heaney" <mheaney@on2.com>]

"M. A. Alves" <maa@liacc.up.pt> wrote in message
news:mailman.1004357020.21840.comp.lang.ada@ada.eu.org...
> You mean use Address_To_Access conversion?  Because what I have is C
> pointers I need to interface with.  I am using Chars_Ptr because it has a
> Null_Ptr value and I need to test for, and pass, NULL.  (And in C char *
> is assuredly able to point to anything.)  But I am indeed considering
> using Address et al., and Address to Access conversion.

The Ada type that corresponds to the C type char* is
Interfaces.C.Strings.chars_ptr.  This is enunciated explicitly in RM95 B.3.1
(1) and (22).

Unfortunately, there is no binding to the C type void* -- this was omitted
from the standard (I assume by accident).  I assume that there will be a
binding to void* in Ada0Y.

I think it's safe to assume that void* is the same as char*, so you should
be OK using C.Strings.chars_ptr where a void* is expected.

I do NOT think you need to use System.Address and Addr_To_Acc_Conv.  The
types declared in C.Strings should be adequate.  That being said, I would be
very surprised if System.Address had a different representation from char*
or void*.