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From "Emmanuel Bourg (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (COMPRESS-115) Imploded entry decompression for Zip archives (method 6)
Date Thu, 19 Dec 2013 16:12:07 GMT

     [ https://issues.apache.org/jira/browse/COMPRESS-115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Emmanuel Bourg resolved COMPRESS-115.
-------------------------------------

       Resolution: Fixed
    Fix Version/s: 1.7

> Imploded entry decompression for Zip archives (method 6)
> --------------------------------------------------------
>
>                 Key: COMPRESS-115
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-115
>             Project: Commons Compress
>          Issue Type: New Feature
>          Components: Archivers
>    Affects Versions: 1.0
>            Reporter: Emmanuel Bourg
>            Assignee: Emmanuel Bourg
>              Labels: zip
>             Fix For: 1.7
>
>         Attachments: explode.c, imploding-4Kdict-2trees.zip, imploding-8Kdict-3trees.zip
>
>
> 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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