1Math::Base85(3)       User Contributed Perl Documentation      Math::Base85(3)
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NAME

6       Math::Base85 - Perl extension for base 85 numbers, as referenced by RFC
7       1924
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SYNOPSIS

10         use Math::Base85;
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12         $bigint = from_base85($number);
13         $b85str = to_base85($bigint);
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DESCRIPTION

16       RFC 1924 describes a compact, fixed-size representation of IPv6
17       addresses which uses a base 85 number system.  This module handles some
18       of the uglier details of it.
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20       The base 85 numbers (from 0 to 84) are as follows:
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22           0..9 A..Z a..z ! # $ % & ( ) * + - ; < = > ? @ ^ _ ` { | } ~
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24       At the moment, there's not much in this module.  But it should be
25       sufficient for the purposes of RFC 1924.
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27       This module has a variable called $Math::Base85::base85_digits, which
28       is a string containing the digits of the base 85 alphabet from lowest
29       (0) to highest (~), in that order.
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31       Additionally, the following two functions are defined for general use.
32       (They will be exported upon request.)
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from_base85

35   Parameters
36       A string composed of valid base 85 digits.
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38   Returns
39       A "Math::BigInt" object representing the number.
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to_base85

42   Parameters
43       A "Math::BigInt" object.
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45   Returns
46       A string of base 85 digits representing the number.
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AUTHORS

49       •   Tony Monroe <tmonroe+perl@nog.net>
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51       •   Paul Cochrane <paul@liekut.de>  (maintainer)
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54       Copyright (c) 2001-2002, Tony Monroe <tmonroe+perl@nog.net>. All rights
55       reserved.  Copyright (c) 2017, Paul Cochrane <paul@liekut.de>. All
56       rights reserved.
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58       You may use this software under the same terms as Perl itself.
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SEE ALSO

61       perl(1).
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65perl v5.38.0                      2023-07-20                   Math::Base85(3)
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