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From "Emmanuel Bourg (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (COMPRESS-115) Imploded entry decompression for Zip archives (method 6)
Date Fri, 06 Dec 2013 19:49:35 GMT

    [ https://issues.apache.org/jira/browse/COMPRESS-115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877381#comment-12877381
] 

Emmanuel Bourg edited comment on COMPRESS-115 at 12/6/13 7:48 PM:
------------------------------------------------------------------

Alternative explode implementation in ClamAV:

https://github.com/vrtadmin/clamav-devel/blob/master/libclamav/explode.h
https://github.com/vrtadmin/clamav-devel/blob/master/libclamav/explode.c



was (Author: ebourg):
Alternative explode implementation in ClamAV:

http://git.clamav.net/gitweb?p=clamav-devel.git;a=blob;f=libclamav/explode.h
http://git.clamav.net/gitweb?p=clamav-devel.git;a=blob;f=libclamav/explode.c


> 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
>              Labels: zip
>         Attachments: 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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