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O���null.pmnu�[���
package DBM_Filter::null ;

use strict;
use warnings;

our $VERSION = '0.03';

sub Store
{
    no warnings 'uninitialized';
    $_ .= "\x00" ;
}

sub Fetch
{
    no warnings 'uninitialized';
    s/\x00$// ;
}

1;

__END__

=head1 NAME

DBM_Filter::null - filter for DBM_Filter

=head1 SYNOPSIS

    use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
    use DBM_Filter ;

    $db = tie %hash, ...
    $db->Filter_Push('null');

=head1 DESCRIPTION

This filter ensures that all data written to the DBM file is null
terminated. This is useful when you have a perl script that needs
to interoperate with a DBM file that a C program also uses. A fairly
common issue is for the C application to include the terminating null
in a string when it writes to the DBM file. This filter will ensure that
all data written to the DBM file can be read by the C application.


=head1 SEE ALSO

L<DBM_Filter>, L<perldbmfilter>

=head1 AUTHOR

Paul Marquess pmqs@cpan.org
PK�4�Z%~�		utf8.pmnu�[���
package DBM_Filter::utf8 ;

use strict;
use warnings;
use Carp;

our $VERSION = '0.03';

BEGIN
{
    eval { require Encode; };

    croak "Encode module not found.\n"
        if $@;
}

sub Store { $_ = Encode::encode_utf8($_) if defined $_ }

sub Fetch { $_ = Encode::decode_utf8($_) if defined $_ }

1;

__END__

=head1 NAME

DBM_Filter::utf8 - filter for DBM_Filter

=head1 SYNOPSIS

    use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
    use DBM_Filter;

    $db = tie %hash, ...
    $db->Filter_Push('utf8');

=head1 DESCRIPTION

This Filter will ensure that all data written to the DBM will be encoded
in UTF-8.

This module uses the Encode module.

=head1 SEE ALSO

L<DBM_Filter>, L<perldbmfilter>, L<Encode>

=head1 AUTHOR

Paul Marquess pmqs@cpan.org

PK�4�Z૒���int32.pmnu�[���
package DBM_Filter::int32 ;

use strict;
use warnings;

our $VERSION = '0.03';

# todo get Filter to figure endian.

sub Store
{
    $_ = 0 if ! defined $_ || $_ eq "" ;
    $_ = pack("i", $_);
}

sub Fetch
{
    no warnings 'uninitialized';
    $_ = unpack("i", $_);
}

1;

__END__

=head1 NAME

DBM_Filter::int32 - filter for DBM_Filter

=head1 SYNOPSIS

    use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
    use DBM_Filter ;

    $db = tie %hash, ...
    $db->Filter_Push('int32');

=head1 DESCRIPTION

This DBM filter is used when interoperating with a C/C++ application
that uses a C int as either the key and/or value in the DBM file.

=head1 SEE ALSO

L<DBM_Filter>, L<perldbmfilter>

=head1 AUTHOR

Paul Marquess pmqs@cpan.org

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package DBM_Filter::compress ;

use strict;
use warnings;
use Carp;

our $VERSION = '0.03';

BEGIN
{
    eval { require Compress::Zlib; Compress::Zlib->import() };

    croak "Compress::Zlib module not found.\n"
        if $@;
}



sub Store { $_ = compress($_) }
sub Fetch { $_ = uncompress($_) }

1;

__END__

=head1 NAME

DBM_Filter::compress - filter for DBM_Filter

=head1 SYNOPSIS

    use SDBM_File; # or DB_File, GDBM_File, NDBM_File, ODBM_File
    use DBM_Filter ;

    $db = tie %hash, ...
    $db->Filter_Push('compress');

=head1 DESCRIPTION

This DBM filter will compress all data before it is written to the database
and uncompressed it on reading.

A fatal error will be thrown if the Compress::Zlib module is not
available.

=head1 SEE ALSO

L<DBM_Filter>, L<perldbmfilter>, L<Compress::Zlib>

=head1 AUTHOR

Paul Marquess pmqs@cpan.org

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package DBM_Filter::encode ;

use strict;
use warnings;
use Carp;

our $VERSION = '0.03';

BEGIN
{
    eval { require Encode; };

    croak "Encode module not found.\n"
        if $@;
}


sub Filter
{
    my $encoding_name = shift || "utf8";

    my $encoding = Encode::find_encoding($encoding_name) ;

    croak "Encoding '$encoding_name' is not available"
        unless $encoding;

    return {
        Store   => sub {
			 $_ = $encoding->encode($_)
			     if defined $_ ;
		   },
        Fetch   => sub {
			 $_ = $encoding->decode($_)
			     if defined $_ ;
			}
        } ;
}

1;

__END__

=head1 NAME

DBM_Filter::encode - filter for DBM_Filter

=head1 SYNOPSIS

    use SDBM_File; # or DB_File, GDBM_File, NDBM_File, ODBM_File
    use DBM_Filter ;

    $db = tie %hash, ...
    $db->Filter_Push('encode' => 'iso-8859-16');

=head1 DESCRIPTION

This DBM filter allows you to choose the character encoding will be
store in the DBM file. The usage is

    $db->Filter_Push('encode' => ENCODING);

where "ENCODING" must be a valid encoding name that the Encode module
recognises.

A fatal error will be thrown if:

=over 5

=item 1

The Encode module is not available.

=item 2

The encoding requested is not supported by the Encode module.

=back

=head1 SEE ALSO

L<DBM_Filter>, L<perldbmfilter>, L<Encode>

=head1 AUTHOR

Paul Marquess pmqs@cpan.org

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