Kristoffer Brånemyr <zti...@yahoo.se> writes: > Which CRC version did you plan to put into gnulib by the way? There > are many different polynomials in use. CRC32 and CRC32C for instance > use different polynomials. I don't remember which polynomial the > routine in cksum used, but I think it was CRC32, but I seem to > remember there was something special with the polynomial that forced > you byteswap the data.
The current one came from use in Kerberos originally, but it seems gzip uses the same (possibly with some byteswapping). I suppose different polynomials require different tables? Not sure how many tables we want to add in the code -- this is actually more motivation for having multiple modules a'la 'crc-slice-by-8', 'crc32c', 'crc32c-slice-by-8' that enables different part of the code, if anyone has needs for optimized versions of the different flavors. There is some code overlap, I guess, but having tables for all flavors may be excessive. /Simon
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