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echo: tuxpower
to: Maurice Kinal
from: Tony Langdon
date: 2016-10-02 07:53:00
subject: Re: CRC32

-=> Maurice Kinal wrote to Tony Langdon <=-

 MK> From what I've read thus far I seriously doubt there is such a thing as
 MK> 'universal' when it comes to crc32.  However I did find at least one
 MK> workable solution (c source) that I slightly modified so that the

I meant "universal" for hatching files.  For that application, there is a
specific CRC32 algorithm specified.

 MK> internal printf only outputs the crc32 8 character hex (0-9,A-F)
 MK> checksum.  At the moment it is only
 MK>  used by my fidonet account as I am sure that is the only place it
 MK> might ever get used and that is debatable.  However not having a common
 MK> file(s) we can test this idea with is the current holdup.  Anyhow it is
 MK> around 5 milliseconds faster then the bash printf of cksum and the
 MK> output is 32 bit hex.  Your milage
 MK>  will vary.

Where can I find this particular source?

 TL> I'd br hsppy to use the Perl option, if I could find it for
 TL> Raspian.

 MK> Do you currently use Raspian for fidonet?  The c source, if it turns
 MK> out to be compatible with the accepted method, would probably be a
 MK> better option.

I agree, if there's C (or Pascal) source in the wild, that's the way to go.

 TL> we have to work with the TIC specs here.

 MK> Says who?  ;-)

Whoever wants it to work with existing TIC processors. ;)


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