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How to compress files using zlib

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  How to compress files using zlib "Angus" <nospam@gmail.com> - 2013-06-08 17:47 +0100
    Re: How to compress files using zlib Willem <willem@turtle.stack.nl> - 2013-06-10 17:34 +0000
      Re: How to compress files using zlib "Angus" <nospam@gmail.com> - 2013-07-07 12:22 +0100

#1970 — How to compress files using zlib

I can use zlib to compress a text file.  But if I compression to a file I 
name aaa.zip, I cannot then open it with the Windows 7 zip tool.  should I 
be able to?  Do I need to specify a specific compression type to support 
that?

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#1973

Angus wrote:
) I can use zlib to compress a text file.  But if I compression to a file I 
) name aaa.zip, I cannot then open it with the Windows 7 zip tool.  should I 
) be able to?  Do I need to specify a specific compression type to support 
) that?

Have you tried naming it aaa.gz ?
The ZIP format has some extra headers that you need to add.


SaSW, Willem
-- 
Disclaimer: I am in no way responsible for any of the statements
            made in the above text. For all I know I might be
            drugged or something..
            No I'm not paranoid. You all think I'm paranoid, don't you !
#EOT

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#1994

"Willem" <willem@turtle.stack.nl> wrote in message 
news:slrnkrc3h8.1usj.willem@turtle.stack.nl...
> Angus wrote:
> ) I can use zlib to compress a text file.  But if I compression to a file 
> I
> ) name aaa.zip, I cannot then open it with the Windows 7 zip tool.  should 
> I
> ) be able to?  Do I need to specify a specific compression type to support
> ) that?
>
> Have you tried naming it aaa.gz ?
> The ZIP format has some extra headers that you need to add.
>
>
> SaSW, Willem

I found in the contrib folder of zlib project minizip which has a sample of 
how to do this.  zlib is a streaming algorithm but zip is a file format and 
you need to assenble the zip file with correct headers as you said.

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