Re: [Boost-users] boost::iostreams::gzip_compressor and multiple files

From: Andrew Holden (aholden_at_[hidden])
Date: 2007-08-09 11:28:35

Unfortunately, this is beyond the capability of the gzip file format.
You might try looking up the "tar" file format (a good starting point
might be http://en.wikipedia.org/wiki/Tar.gz).

One would normally use tar to group the files together into a single
data stream, and then use gzip to compress that stream.

> -----Original Message-----
> From: boost-users-bounces_at_[hidden] 
> [mailto:boost-users-bounces_at_[hidden]] On Behalf Of 
> Robert Caldecott
> Sent: Thursday, August 09, 2007 6:33 AM
> To: boost-users_at_[hidden]
> Subject: [Boost-users] boost::iostreams::gzip_compressor and 
> multiple files
> 
> I have been experimenting with the boost::iostreams to create 
> a gzip file, for example the following works fine:
> 
> using namespace boost::iostreams;
> filtering_ostream out;	
> out.push(gzip_compressor());
> out.push(file_sink("test.gz", std::ios::binary)); out << 
> "This is a gz file\n";
> 
> This will create a gz file containing a single compressed 
> file (called 'test').
>  I can change the name of this internal file using a 
> gzip_params struct and all is well.
> 
> However, I want to create a single gzip file that contains 
> multiple compressed files, each with a different filename.  
> Does anyone know how to achieve this?
> 
> Thanks in advance.
> 
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