Ethereal-dev: RE: [Ethereal-dev] CRC wish list

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From: "Maynard, Chris" <[email protected]>
Date: Thu, 29 Jul 2004 11:54:21 -0400
Attached are patches to the crc16 and crc32 files.  
The new functions/changes I added are:

1) To be able to compute crc's using a different seed than the ccitt
   default seed of (-1).  This allows you to do things such as compute a crc

   spanning multiple buffers by feeding the partial crc back in and 
   continuing the calculation on the next buffer.

2) To allow a crc calculation to be done on only part of the tvb, by 
   allowing an offset to be specified. 

3) Documented the headers for usage, format shamelessly stolen from proto.h.

As this is my first patch submission, I hope this is the correct format. 
- Chris
 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Richard van der Hoff
Sent: Tuesday, July 27, 2004 1:36 PM
To: Ethereal development
Subject: Re: [Ethereal-dev] CRC wish list

On Tue, Jul 20, 2004 at 02:29:32PM -0400, Maynard, Chris wrote:
> First, thanks to Richard van der Hoff for adding the crc16 routines.

You're welcome :)

> <snip suggestions for additional funtionality>

Chris, these all seem entirely reasonable suggestions. Certainly, it
would seem to make sense to factor out the 32-bit CRC functions so that
you can run them on an arbitrary buffer.

But, as with all new utility functions, they're going to get added as and
when
they're needed. I'm not going to do it, because I don't need them and
don't have anything to test them against. If you want the functionality,
I suggest you submit a patch :)

-- 
Richard van der Hoff <[email protected]>
Systems Analyst
Tel: +44 (0) 845 666 7778
http://www.mxtelecom.com

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Attachment: crc32diff.h
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Attachment: crc16diff.c
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Attachment: crc16diff.h
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Attachment: crc32diff.c
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