[sword-devel] Zipfile module downloads

[Troy A. Griffitts]

OK, I'm wrong a little.

We compile one file: untgz.c

"Troy A. Griffitts" <scribe at crosswire.org> wrote: 
>DM Smith <dmsmith555 at yahoo.com> wrote: 
>>Found out a bit more:
>>Sword uses a 2002 copy of zlib. It has been updated since then with  
>>bug, security and performance fixes.
>
>Thanks for all the investigation DM!
>
>Just to clarify:  From memory, I don't believe the SWORD engine actually
>uses the copy of zlib which is in svn.  It is located at:
>
>sword/src/utilfuns/zlib
>
>I believe it is included for frontends who wish to use zlib support in the
>engine, but don't have zlib-devel available for their platform.
>
>I would guess BibleCS uses it.
>
>I'm quite sure if you enable zlib support (the default) on a linux box it
>uses your system's zlib-devel package.
>
>We could remove it and see if things still compile. :)
>
>  -Troy.
>
>
>>
>>On Sep 20, 2007, at 10:02 PM, DM Smith wrote:
>>
>>> More results of exploration:
>>>
>>> At zlib.net, the home of the zlib code, there is a faq question  
>>> regarding zip archives with a recommended solution:
>>>
>>>     11. Can zlib handle .zip archives?
>>>            Not by itself, no. See the directory contrib/minizip in  
>>> the zlib distribution.
>>>
>>> Minizip is what I found by other searches. It's home is at:
>>> http://www.winimage.com/zLibDll/minizip.html
>>>
>>> It appears that it requires only a few files to do unzip of an  
>>> archive.
>>>
>>> What do I need to do to continue on this track? I don't want my  
>>> efforts to go to waste. I realize this might not make a 1.5.10  
>>> effort, unless it is incredibly easy and fully testable :)
>>>
>>> In Him,
>>>         DM
>>>
>>> On Sep 20, 2007, at 6:59 PM, DM Smith wrote:
>>>
>>>> Troy,
>>>>         I studied the untargz code and all the other code in the zlib
>>>> directory. It does not apply to zip files. A zipfile has a table of
>>>> contents and the zlib code does not read it. An entry in the TOC will
>>>> have the location of the file and it's size in the zipfile and how it
>>>> is stored. (Typically, images are stored uncompressed.) IIRC, the TOC
>>>> also has CRC info. I'm looking for code that reads the TOC. I have
>>>> found some, but I'm wondering if anyone else has seen something that
>>>> they can recommend.
>>>>
>>>>         The zlib code essentially reads a byte stream and uncompresses
>>it.
>>>> There is also code present to untar a stream.
>>>> DM
>>>>
>>>> On Sep 20, 2007, at 6:21 PM, Troy A. Griffitts wrote:
>>>>
>>>>> There is already code to unpack the mods.d.tar.gz file.  I believe
>>>>> the code
>>>>> we used for that came from the zlib project.  It may be similar to
>>>>> what you
>>>>> need to do for a zip file.  I can't remember offhand.
>>>>>
>>>>>
>>>>> DM Smith <dmsmith555 at yahoo.com> wrote:
>>>>>> I'm looking into adding to installmgr the download of a cached  
>>>>>> zipped
>>>>>> module, if present at the download site. Otherwise the code will
>>>>>> work as
>>>>>> before.
>>>>>>
>>>>>> I've run into an obstacle: zlib cannot read the "table of
>>>>>> contents" in a
>>>>>> zipfile. I'm looking for a portable way to do the unzip. Any
>>>>>> suggestions?
>>>>>>
>>>>>> Many thanks,
>>>>>>    DM
>>>>>>
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>>>>>
>>>>>
>>>>>
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