1Digest::CRC(3)        User Contributed Perl Documentation       Digest::CRC(3)
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NAME

6       Digest::CRC - Generic CRC functions
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SYNOPSIS

9         # Functional style
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11         use Digest::CRC qw(crc64 crc32 crc16 crcccitt crc crc8 crcopenpgparmor);
12         $crc = crc64("123456789");
13         $crc = crc32("123456789");
14         $crc = crc16("123456789");
15         $crc = crcccitt("123456789");
16         $crc = crc8("123456789");
17         $crc = crcopenpgparmor("123456789");
18
19         $crc = crc($input,$width,$init,$xorout,$refout,$poly,$refin,$cont);
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21
22         # add data to existing
23
24         $crc = crc32("ABCD", $crc);
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26
27         # OO style
28         use Digest::CRC;
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30         $ctx = Digest::CRC->new(type=>"crc16");
31         $ctx = Digest::CRC->new(width=>16, init=>0x2345, xorout=>0x0000,
32                                 refout=>1, poly=>0x8005, refin=>1, cont=>1);
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34         $ctx->add($data);
35         $ctx->addfile(*FILE);
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37         $digest = $ctx->digest;
38         $digest = $ctx->hexdigest;
39         $digest = $ctx->b64digest;
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DESCRIPTION

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

48       https://tools.ietf.org/html/rfc4880#section-6
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AUTHOR

51       Oliver Maul, oli@42.nu
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54       CRC algorithm code taken from "A PAINLESS GUIDE TO CRC ERROR DETECTION
55        ALGORITHMS".
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57       The author of this package disclaims all copyrights and releases it
58       into the public domain.
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62perl v5.28.1                      2017-02-18                    Digest::CRC(3)
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