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Compress::LZO (3)
  • >> Compress::LZO (3) ( Разные man: Библиотечные вызовы )
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    NAME

    Compress::LZO - Interface to the 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.

    If the string is not compressible, undef is returned.  

    DECOMPRESSION FUNCTIONS

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

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

    On error (in case of corrupted data) 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 [,$initialAdler]);
        $crc = Compress::LZO::crc32($string [,$initialCrc]);
    
    
     

    AUTHOR

    The Compress::LZO module was written by Markus F.X.J. Oberhumer markus@oberhumer.com. The latest copy of the module should also be found on CPAN in modules/by-module/Compress/Compress-LZO-x.y.tar.gz.

    The LZO compression library was written by Markus F.X.J. Oberhumer markus@oberhumer.com. It is available from the LZO home page at http://www.oberhumer.com/opensource/lzo/.

    The LZO library and algorithms are Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 by Markus Franz Xaver Johannes Oberhumer markus@oberhumer.com. All Rights Reserved.  

    MODIFICATION HISTORY

    1.08 2002-08-29 Updated for Perl 5.8.0.

    1.00 1998-08-22 First public release of Compress::LZO.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    COMPRESSION FUNCTIONS
    DECOMPRESSION FUNCTIONS
    OPTIMIZATION FUNCTIONS
    CHECKSUM FUNCTIONS
    AUTHOR
    MODIFICATION HISTORY


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