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NNTP-Posting-Date: Mon, 07 Feb 2005 18:30:48 -0600
From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
References: <211db0ae.0502070437.54add641@posting.google.com>
Subject: Re: Bit manipulation
Date: Mon, 7 Feb 2005 18:32:36 -0600
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Date: 2005-02-07T18:32:36-06:00
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"Maurizio" <maurizio.ferracini@gmail.com> wrote in message
news:211db0ae.0502070437.54add641@posting.google.com...
> hi, i need two hint:
>
> i need to acces to a 32 bit word (Interfaces.Unsigned_32).
> how i can do to take the three m.s.bit? (30,31,32)
>
> second, i need to send the 32 bit word over a Tcp connection to a C
> program, but
> socket work with usigned 8 bit word, so i need to split the 32 bit in
> 4 8bit word,
> and when i read from the socket take 4 8bit word and combine in a 32
> word.
>
> i see that Ada.Unchecked_Conversion work (in an ada client/server test
> program)  but is correct?

In both cases, I'd define an appropriate record type and use
Unchecked_Conversion to convert it to a 32-bit word. I'll leave the details
for someone else to explain.

          Randy.