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From: "Julian Morrison" <julian@extropy.demon.co.uk>
Newsgroups: comp.lang.ada
Subject: Re: Questions: interfacing to C
Date: Tue, 02 Jan 2001 05:15:58 +0000
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Date: 2001-01-02T05:15:58+00:00
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"Robert Dewar" <robert_dewar@my-deja.com> wrote:

> I really don't see why Interfaces.C.Pointers is relevant here.
> Everything that is needed here can likely be found in Annex B.
> 
> Part of the trouble is that we do not have enough information in the
> question, what does "shim" mean? One does not interface directly to
> types, but typically through procedure calls, so what we really need
> here is the full set of declarations.

I'm trying to "pragma Import" some C functions (a subset of OpenSSL's
crypto stuff, to be exact) and I have to build Ada equivalents of the
structs it requires and sometimes returns, so I can pass them around and
poke about inside (eg: to set up a RSA key struct from a received binary
public-key). I'm trying to figure the limits of what the language will do
for me as a freebie - as versus what I have to manually convert.
 
> Note that convention C_Pass_By_Copy is also relevant in this
> discussion.,

Where in the ARM is that one defined? I can't find the dratted thing.

PS, to you and anyone else who's responded, thanks :-)