NAME

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

SYNOPSIS

           use Digest::JHash qw(jhash);

           $digest = jhash($data);

           # note that calling jhash() directly like this is the fastest way:

           $digest = Digest::JHash::jhash($data);

DESCRIPTION

       The "Digest::JHash" module allows you to use the fast JHash hashing algorithm developed by Bob Jenkins
       from within Perl programs. The algorithm takes as input a message of arbitrary length and produces as
       output a 32-bit "message digest" of the input in the form of an unsigned long integer.

       Call it a low calorie version of MD5 if you like.

       See http://burtleburtle.net/bob/hash/doobs.html for more information.

FUNCTIONS

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

EXPORTS

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

SPEED NOTE

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

AUTHORS

       The JHash implementation was written by Bob Jenkins <bob_jenkins [at] burtleburtle [dot] net>.

       This perl extension was written by Andrew Towers <mariofrog [at] bigpond [dot] com>.

       A few mods were added by James Freeman <airmedical [at] gmail [dot] com>).

SEE ALSO

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

LICENSE

       This  package  is  free  software  and is provided "as is" without express or implied warranty. It may be
       used, redistributed and/or modified under the terms of the Artistic License 2.0. A  copy  is  include  in
       this distribution.

perl v5.38.2                                       2024-04-01                                 Digest::JHash(3pm)