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From: Niklas Holsti <niklas.holsti@tidorum.invalid>
Newsgroups: comp.lang.ada
Subject: Re: Coding access to a C's pointer - pointer
Date: Sat, 6 Jun 2020 19:59:08 +0300
Organization: Tidorum Ltd
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Date: 2020-06-06T19:59:08+03:00
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On 2020-06-06 19:23, Bob Goddard wrote:
> I'm trying to shoehorn net-snmp into an Ada conversion and I've hit a roadblock.
> 
> snmp_synch_response requires a pointer to a pointer:
> snmp_synch_response(netsnmp_session *, netsnmp_pdu *, netsnmp_pdu **)
> 
> Just how the heck do you code that? You can't just declare a System.Address.

Declare the parameter type as "access netsnmp_pdu" and its mode as 
"access" or "in out" or "out", depending on what snmp_synch_response 
actually does with the parameter. The mode gets you one C '*' and the 
access type gets you the second '*'.

See RM B.3(68).

-- 
Niklas Holsti

niklas holsti tidorum fi
       .      @       .