Re: howto create a zip programmatically

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From: Tom Stewart (tastewar_at_newsgroups.nospam)
Date: 05/28/04 

Date: Fri, 28 May 2004 08:44:04 -0400

Thanks -- I did end up there after gzip. 

--
Tom
"Paweł Pawlak" <morr!s@elys!um.pl> wrote in message news:c96nj0$3vq$1@helios.domdata.com...
>
> >>>It's just that i'm not aware if gzip is compatible with WinZip, or if
> >
> > gzip
> >
> >>>files are the same as Zip files.
> >>>zlib can create standard gzip files, so, if gzip files are compatible
> >
> > with
> >
> >>>WinZip then so will be the files created with zlib.
> >>>
> >>>What library did you used?
> >>
> >>I used the ZLIB library.  It's available from
> >>        http://www.gzip.org/zlib/
> >>
> >>But be aware that it's just a compression scheme.  It doesn't create
> >>archives that contain multiple files, you'll have to do that somehow
> >>yourself.  But a single ZLIB-created file was perfectly readable by WinZip
> >>and vice versa.
> >>
> >>    Norm
> >
> >
> > To use the ZLIB library to create PKZIP compatible archives, you will
> > need the ZIP header format from PKWARE's web site at
> > http://www.pkzip.com/products/enterprise/white_papers/appnote.html
> >
> > With the ZIP header information and ZLIB source code you should be able
> > to develop a compression/decompression library. I have created such a
> > library
> > for my employer that is compatible with PKZIP and WinZIP. Unfortunatly I can
> > not send you the source code due to company policies, but I can help if
> > needed.
>
> As an alternative you may use a dynamic link library, that is able to
> create ZIP archives. Have a look at http://www.info-zip.org/
>
> Pawel

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