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From "Emmanuel Bourg (JIRA)" <j...@apache.org>
Subject [jira] Created: (COMPRESS-115) Imploded entry decompression for Zip archives (method 6)
Date Wed, 09 Jun 2010 23:08:13 GMT
Imploded entry decompression for Zip archives (method 6)
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                 Key: COMPRESS-115
                 URL: https://issues.apache.org/jira/browse/COMPRESS-115
             Project: Commons Compress
          Issue Type: New Feature
    Affects Versions: 1.0
            Reporter: Emmanuel Bourg


This is a RFE to implement the decompression of zip file entries using the imploded compression
method (aka method 6). This method is found in archives created with old versions of PKZip.
Only the decompression operation is really useful since this method is less efficient than
deflate.

Some links with technical information about this format:

http://www.pkware.com/documents/casestudies/APPNOTE.TXT

http://en.wikipedia.org/wiki/Shannon%E2%80%93Fano_coding

http://en.wikipedia.org/wiki/LZ77

http://src.opensolaris.org/source/xref/sfw/usr/src/cmd/unzip/explode.c

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