From mboxrd@z Thu Jan  1 00:00:00 1970
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From: tmoran@bix.com (Tom Moran)
Subject: Re: How do I use ADA to calculate a checksum?
Date: 1997/09/23
Message-ID: <3428260f.18587022@SantaClara01.news.InterNex.Net>#1/1
X-Deja-AN: 274957703
References: <3427DF0F.4467@scarecrow.gcs.redstone.army.mil>
Organization: InterNex Information Services 1-800-595-3333
Newsgroups: comp.lang.ada
Date: 1997-09-23T00:00:00+00:00
List-Id: <comp.lang.ada>


I presume you want to calculate a byte or word-wise checksum on data
which is a record (ie, not an array of bytes or words)?  Yoy can
delcare an array of bytes/words and use a representation clause to
make it overlay, ie, start at the same address as, the record.  Then
just run through the array calculating the checksum, CRC, or whatever.
If you are passed an Access type rather than an Address, use the
appropriate function in System.Address_To_Access_Conversions to get an
Address.