Re^2: CRC checking

I had a look at Digest::CRC and believe it will do what I want but documentation is very limited. Can you explain init, xorout, refin and refout? I understand the width and poly fields.

Comment on Re^2: CRC checking

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Re^3: CRC checking by Tomte (Priest) on Jun 17, 2004 at 10:20 UTC
A quick glance at the source suggests that they are flags/values indicating/used for: refin reflect bitwise (mirror) the input before processing the message refout reflect bitwise (mirror) the processed data before returning (hmmm, unless refin is set...) xorout the output is XORed with this value prior to returning it init is the initial `crc` value Update: (added init explanation) I suggest you take a closer look at the `%_typedef` hash! Edit: removed doubt-indicating questionmarks. HTH, regards, tomte An intellectual is someone whose mind watches itself. -- Albert Camus	[reply]

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Re^3: CRC checking
by Tomte (Priest) on Jun 17, 2004 at 10:20 UTC

A quick glance at the source suggests that they are flags/values indicating/used for:

refin
reflect bitwise (mirror) the input before processing the message
refout
reflect bitwise (mirror) the processed data before returning (hmmm, unless refin is set...)
xorout
the output is XORed with this value prior to returning it
init
is the initial crc value

Update:

%_typedef

Edit: removed doubt-indicating questionmarks.

HTH, regards,
tomte

An intellectual is someone whose mind watches itself.
-- Albert Camus

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