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NNTP-Posting-Date: Thu, 02 Aug 2007 15:27:51 -0500
From: tmoran@acm.org
Newsgroups: comp.lang.ada
Subject: Re: Byte streams
References: <1186082475.711489.104420@e9g2000prf.googlegroups.com>
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Date: Thu, 02 Aug 2007 15:27:51 -0500
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Date: 2007-08-02T15:27:51-05:00
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> type AnotherStructure is record
>     a : Integer;
>     b : Integer;
>     c : Integer;
> end Record;
>
> toByteStream is new Unchecked_Conversion
>     (source => AnotherStructure, Target => ByteStream);
>
> however ByteStream is unconstrained...
>
> Any suggestions?

   1) Either use, or look at the source code of, one or more of the
      multiple Ada socket implementations available on the internet.

   2) Assuming Integer is 4 bytes,
      subtype External_AnotherStructure is Bytestream(1 .. 12);
      toByteStream is new Unchecked_Conversion
          (source => AnotherStructure, Target => External_AnotherStructure);

   3) If you send AnotherStructure a lot, and assuming Integer is 4 bytes,
      procedure send_AnotherStructure (data : AnotherStructure;
                                       numBytes : Integer => 12);
      pragma import (C, send_AnotherStructure, "sendBytes");