digest::crc(3) osx man page | unix.com

Digest::CRC(3)						User Contributed Perl Documentation					    Digest::CRC(3)

NAME
       Digest::CRC - Generic CRC functions

SYNOPSIS
	 # Functional style

	 use Digest::CRC qw(crc64 crc32 crc16 crcccitt crc crc8 crcopenpgparmor);
	 $crc = crc64("123456789");
	 $crc = crc32("123456789");
	 $crc = crc16("123456789");
	 $crc = crcccitt("123456789");
	 $crc = crc8("123456789");
	 $crc = crcopenpgparmor("123456789");

	 $crc = crc($input,$width,$init,$xorout,$refout,$poly,$refin,$cont);

	 # add data to existing

	 $crc = crc32("ABCD", $crc);

	 # OO style
	 use Digest::CRC;

	 $ctx = Digest::CRC->new(type=>"crc16");
	 $ctx = Digest::CRC->new(width=>16, init=>0x2345, xorout=>0x0000,
				 refout=>1, poly=>0x8005, refin=>1, cont=>1);

	 $ctx->add($data);
	 $ctx->addfile(*FILE);

	 $digest = $ctx->digest;
	 $digest = $ctx->hexdigest;
	 $digest = $ctx->b64digest;

DESCRIPTION
       The Digest::CRC module calculates CRC sums of all sorts.  It contains wrapper functions with the correct parameters for CRC-CCITT, CRC-16,
       CRC-32 and CRC-64, as well as the CRC used in OpenPGP's ASCII-armored checksum.

SEE ALSO
       https://tools.ietf.org/html/rfc4880#section-6

AUTHOR
       Oliver Maul, oli@42.nu

COPYRIGHT
       CRC algorithm code taken from "A PAINLESS GUIDE TO CRC ERROR DETECTION
	ALGORITHMS".

       The author of this package disclaims all copyrights and releases it into the public domain.

perl v5.16.2							    2013-08-25							    Digest::CRC(3)