package PAR::Filter::Bleach;
use 5.006;
use strict;
use warnings;
use base 'PAR::Filter';

=head1 NAME

PAR::Filter::Bleach - Bleach filter

=head1 SYNOPSIS

    PAR::Filter::Bleach->apply(\$code);	# transforms $code

=head1 DESCRIPTION

This filter removes all the unsightly printable characters from
your source file, using an algorithm similar to Damian Conway's
L<Acme::Bleach>.

=cut

sub apply {
    my $ref = $_[1];

    $$ref = unpack("b*", $$ref);
    $$ref =~ tr/01/ \t/;
    $$ref =~ s/(.{9})/$1\n/g;
	$$ref = q($_=<<'';y;\r\n;;d;y; \t;01;;$_=pack'b*',$_;$_=eval;$@&&die$@;$_)."\n$$ref\n\n";
}

1;

=head1 SEE ALSO

L<PAR::Filter>

=head1 AUTHORS

Audrey Tang E<lt>cpan@audreyt.orgE<gt>

You can write
to the mailing list at E<lt>par@perl.orgE<gt>, or send an empty mail to
E<lt>par-subscribe@perl.orgE<gt> to participate in the discussion.
Archives of the mailing list are available at
E<lt>https://www.mail-archive.com/par@perl.org/E<gt> or E<lt>https://groups.google.com/g/perl.parE<gt>.

Please submit bug reports to E<lt>https://github.com/rschupp/PAR-Packer/issuesE<gt>.

=head1 COPYRIGHT

Copyright 2003-2009 by Audrey Tang E<lt>cpan@audreyt.orgE<gt>.

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

See F<LICENSE>.

=cut
