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

6       Digest::JHash - Perl extension for 32 bit Jenkins Hashing Algorithm
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SYNOPSIS

9           use Digest::JHash qw(jhash);
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11           $digest = jhash($data);
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13           # note that calling jhash() directly like this is the fastest way:
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15           $digest = Digest::JHash::jhash($data);
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DESCRIPTION

18       The "Digest::JHash" module allows you to use the fast JHash hashing
19       algorithm developed by Bob Jenkins from within Perl programs. The
20       algorithm takes as input a message of arbitrary length and produces as
21       output a 32-bit "message digest" of the input in the form of an
22       unsigned long integer.
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24       Call it a low calorie version of MD5 if you like.
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26       See http://burtleburtle.net/bob/hash/doobs.html for more information.
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FUNCTIONS

29       jhash($data)
30           This function will calculate the JHash digest of the "message" in
31           $data and return a 32 bit integer result (an unsigned long in the
32           C)
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EXPORTS

35       None by default but you can have the jhash() function if you ask
36       nicely.  See below for reasons not to use Exporter (it is slower than a
37       direct call)
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SPEED NOTE

40       If speed is a major issue it is roughly twice as fast to do call the
41       jhash() function like Digest::JHash::jhash('message') than it is to
42       import the jhash() method using Exporter so you can call it as simply
43       jhash('message').  There is a short script that demonstrates the speed
44       of different calling methods (direct, OO and Imported) in
45       examples/oo_vs_func.pl
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AUTHORS

48       The JHash implementation was written by Bob Jenkins <bob_jenkins [at]
49       burtleburtle [dot] net>.
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51       This perl extension was written by Andrew Towers <mariofrog [at]
52       bigpond [dot] com>.
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54       A few mods were added by James Freeman <airmedical [at] gmail [dot]
55       com>).
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SEE ALSO

58       http://burtleburtle.net/bob/hash/doobs.html
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LICENSE

61       This package is free software and is provided "as is" without express
62       or implied warranty. It may be used, redistributed and/or modified
63       under the terms of the Artistic License 2.0. A copy is include in this
64       distribution.
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68perl v5.32.1                      2021-01-27                  Digest::JHash(3)
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