See http://www.thoughtstuff.com/rme/lisp.html#crc-32
cryptography
CRC-32
A library to compute the CRC-32 algorithm that is described in RFC 1952. R. Matthew Emerson, the author, says "The code runs pretty well in CMUCL, which (given appropriate declarations) is able to deal with 32 bit integers directly... I suppose it would also run well on machines with 32
bit fixnums. Otherwise, it will cons bignums like crazy.". This is Public Domain
cryptography
cryptography