NAME

Compress::LZO - Interface to LZO compression library

SYNOPSIS

    use Compress::LZO;

    $dest = Compress::LZO::compress($source, [$level]);
    $dest = Compress::LZO::decompress($source);
    $dest = Compress::LZO::optimize($source);

    $crc = Compress::LZO::adler32($buffer [,$crc]);
    $crc = Compress::LZO::crc32($buffer [,$crc]);

    LZO_VERSION, LZO_VERSION_STRING, LZO_VERSION_DATE

DESCRIPTION

The Compress::LZO module provides a Perl interface to the LZO compression library (see "AUTHOR" for details about where to get LZO). A relevant subset of the functionality provided by LZO is available in Compress::LZO.

All string parameters can either be a scalar or a scalar reference.

COMPRESSION FUNCTIONS

$dest = Compress::LZO::compress($string)

Compress a string using the default compression level, returning a string containing compressed data.

$dest = Compress::LZO::compress($string, $level)

Compress string, using the chosen compression level (either 1 or 9). Return a string containing the compressed data.

On error undef is returned.

DECOMPRESSION FUNCTIONS

$dest = Compress::LZO::decompress($string)

Decompress the data in string, returning a string containing the decompressed data.

On error undef is returned.

OPTIMIZATION FUNCTIONS

$dest = Compress::LZO::optimize($string)

Optimize the representation of the compressed data, returning a string containing the compressed data.

On error undef is returned.

CHECKSUM FUNCTIONS

Two functions are provided by LZO to calculate a checksum. For the Perl interface, the order of the two parameters in both functions has been reversed. This allows both running checksums and one off calculations to be done.

    $crc = Compress::LZO::adler32($string [,$crc]) ;
    $crc = Compress::LZO::crc32($string [,$crc]) ;

AUTHOR

The Compress::LZO module was written by Markus F.X.J. Oberhumer markus.oberhumer@jk.uni-linz.ac.at. The latest copy of the module should also be found on CPAN in modules/by-module/Compress/perl-lzo-x.x.tar.gz.

The LZO compression library was written by Markus F.X.J. Oberhumer markus.oberhumer@jk.uni-linz.ac.at. It is available from the LZO home page at http://wildsau.idv.uni-linz.ac.at/mfx/lzo.html.

MODIFICATION HISTORY

1.00 First public release of Compress::LZO.