Meredith Howard > Compress-LZW-0.01 > Compress::LZW

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Module Version: 0.01   Source  

NAME ^

Compress::LZW -- Pure perl implementation of LZW

WARNING ^

This module does not yet support compress(1)'s .Z files!! Nor is its interface stable. Hence the alpha status. Expect support to come soon.

WARNING ^

Read above once more :)

SYNOPSIS ^

  use Compress::LZW;
  
  my $compressed = compress($fatdata);
  my $fatdata    = decompress($compressed);
  
  my $smallcompressed = compress($thindata, 12);
  my $thindata        = decompress($smallcompressed, 12);

DESCRIPTION ^

Compress::LZW it a perl implementation of the newly free LZW compression algorithm. It defaults to building a 16-bit codeword table, but provides the ability to choose a 12-bit table also. Depending on the size of your data, the 12-bit table may provide better compression.

Functions

compress

Takes a string as its first argument, and returns the compressed result. You can also specify the size of your codeword table in @_[1], choosing either 12 or 16. 16 is the default. compress will

decompress

Takes a string as its first argument, and returns the decompressed result. You can also specify the size of your codeword table in @_[1], choosing either 12 or 16. 16 is the default.

EXPORTS ^

Compress::LZW exports: compress decompress That's all.

SEE ALSO ^

Other Compress::* modules, especially Compress::LZV1, Compress::LZF and Compress::Zlib.

AUTHOR ^

Sean O'Rourke, <seano@cpan.org> - Original author, Compress::SelfExtracting

Matt Howard <mhoward@hattmoward.org> - Compress::LZW

Bug reports welcome, patches even more welcome.

COPYRIGHT ^

Copyright (C) 2003 Sean O'Rourke & Matt Howard. All rights reserved, some wrongs reversed. This module is distributed under the same terms as Perl itself. Let me know if you actually find it useful.

MH: Also, credit to Rocco Caputo for a 2nd implementation to study. Thanks!

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