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lib/Compress/BGZF/Reader.pm  view on Meta::CPAN

    # Move to a virtual offset (somehow pre-calculated) and read 32 bytes
    $reader->move_to_vo( $virt_offset );
    my $data = $reader->read_data(32);
    print $data;

    $reader->write_index( $fn_idx );

=head1 DESCRIPTION

C<Compress::BGZF::Reader> is a module implementing random access to the BGZIP file
format. While it can do sequential/streaming reads, there is really no point
in using it for this purpose over standard GZIP tools/libraries, since BGZIP
is GZIP-compatible.

There are two main modes of construction - as an object (using C<new()>) and
as a filehandle glob (using C<new_filehandle>). The filehandle mode is
straightforward for general use (emulating seek/read/tell functionality and
passing to other classes/methods that expect a filehandle).  The object mode
has additional features such as seeking to virtual offsets and dumping the
offset index to file.