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From: Martin Krischik <martin@krischik.com>
Subject: Re: Getting length of array from C
Newsgroups: comp.lang.ada
Reply-To: martin@krischik.com
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Date: Tue, 01 Feb 2005 08:25:25 +0100
Xref: g2news1.google.com comp.lang.ada:8103
Date: 2005-02-01T08:25:25+01:00
List-Id: <comp.lang.ada>

Chuck wrote:

> Is there some way of getting an ada array length from C interface code?
> I have to try and accomplish this while minimizing the number of
> changes to the original Ada code.  Any ideas?

I did a lot of C interfacing and there are quite a few option open. Usualy
you need two parameters one for the array one for the size.

A very interesting hint - if you declare the following type inside a
procedure:

  type C_Array is array 0 .. Number - 1 of Interfaces.C.int;

then Number does not need to a constant. And of course the other way around
as well:

  type Ada_Array is array 1 .. Number of Integer;


Martin

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mailto://krischik@users.sourceforge.net
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