DOKK / manpages / debian 12 / libconvert-ascii85-perl / Convert::Ascii85.3pm.en
Convert::Ascii85(3pm) User Contributed Perl Documentation Convert::Ascii85(3pm)

Convert::Ascii85 - Encoding and decoding of ascii85/base85 strings

 use Convert::Ascii85;
 
 my $encoded = Convert::Ascii85::encode($data);
 my $decoded = Convert::Ascii85::decode($encoded);
 use Convert::Ascii85 qw(ascii85_encode ascii85_decode);
 
 my $encoded = ascii85_encode($data);
 my $decoded = ascii85_decode($encoded);

This module implements the Ascii85 (also known as Base85) algorithm for encoding binary data as text. This is done by interpreting each group of four bytes as a 32-bit integer, which is then converted to a five-digit base-85 representation using the digits from ASCII 33 ("!") to 117 ("u").

This is similar to MIME::Base64 but more space efficient: The overhead is only 1/4 of the original data (as opposed to 1/3 for Base64).

Converts the bytes in DATA to Ascii85 and returns the resulting text string. OPTIONS is a hash reference in which the following keys may be set:
By default, four-byte chunks of null bytes ("\0\0\0\0") are converted to 'z' instead of '!!!!!'. This can be avoided by passing a false value for "compress_zero" in OPTIONS.
By default, four-byte chunks of spaces (' ') are converted to '+<VdL'. If you pass a true value for "compress_space" in OPTIONS, they will be converted to 'y' instead.

This function may be exported as "ascii85_encode" into the caller's namespace.

Converts the Ascii85-encoded TEXT back to bytes and returns the resulting byte string. Spaces and linebreaks in TEXT are ignored.

This function may be exported as "ascii85_decode" into the caller's namespace.

<http://en.wikipedia.org/wiki/Ascii85>, MIME::Base64

Lukas Mai, "<l.mai at web.de>"

Please report any bugs or feature requests to "bug-convert-ascii85 at rt.cpan.org", or through the web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Convert-Ascii85>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

You can find documentation for this module with the perldoc command.

    perldoc Convert::Ascii85

You can also look for information at:

  • RT: CPAN's request tracker

    <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Convert-Ascii85>

  • AnnoCPAN: Annotated CPAN documentation

    <http://annocpan.org/dist/Convert-Ascii85>

  • CPAN Ratings

    <http://cpanratings.perl.org/d/Convert-Ascii85>

  • Search CPAN

    <http://search.cpan.org/dist/Convert-Ascii85/>

Copyright 2011 Lukas Mai.

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.

2022-10-13 perl v5.34.0