Re: Zip-files
Re: Zip-files
- Subject: Re: Zip-files
- From: "Mike Hall" <email@hidden>
- Date: Fri, 14 Jan 2005 18:25:41 -0600
On 14 Jan 2005, at 03:34, Mike Hall wrote:
>> On Jan 13, 2005, at 12:17 PM, Fredrik Olsson wrote:
>>> And no I am not interested in Mac specific data, as the source files
>>> comes from Windows users.
>
> You might take a look at http://www.gzip.org/zlib/
> zlib and pkzip are neither identical nor compatible.
I would prefer the requestor do his own googling for specific documentation
he is interested in, but consider
http://datacompression.info/Zlib.shtml
where we find...
zlib
zlib is a freeware multiplatform compression library written in highly
portable C. zlib implements the deflate algorithm used by PKZip, which means
it can be used as the compression engine for Zip compatible archivers. It
has also found use as the standard compressor in quite a few other products,
and is rightly hailed as a wonderful piece of work.
Although I think I was to some extent confusing PKZip and it's originating
company PKWare, if I remember right there, who pretty much decided how it is
implemented.
Was it this mix up that bothers you or do you in fact consider the
implementations in zlib and PKZip incompatible?
You might consider as well
http://www.faqs.org/rfcs/rfc1950.html
although that indicates P. Deutsch associated with Aladdin I thought when he
originally did a lot of this it was while still with PKWare.
zlib would be to my understanding the opensource, unencumbered (patents or
whatever), implementation of what was originally PKWare proprietary..
There still may be some incompatability I'm unaware of though. What specific
incompatability or plural of that were you thinking of?
Mike Hall mikehall at spacestar dot net
http://www.spacestar.net/users/mikehall
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