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 <[EMAIL PROTECTED]> 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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