Re: [Boost-users] concat files for compression

Subject: Re: [Boost-users] concat files for compression
From: Roland Bock (rbock_at_[hidden])
Date: 2010-06-11 03:34:27

Kraus Philipp wrote:
> Hi,
> 
> on my previous posting I have another questing:
> 
> I create my compression stream with
>         
> bio::filtering_streambuf< bio::input > l_deflate;
>         switch (m_compress) {
>             case gzip   : l_deflate.push( bio::gzip_compressor() );    
> break;
>             case bzip2  : l_deflate.push( bio::bzip2_compressor() );   
> break;
>         }
> 
> For a single file I push it to zip with:
> 
> l_deflate.push( bio::file_source(p_str1, BOOST_IOS::binary) );
> 
> I need a concatination for two files like:
> l_deflate.push( bio::file_source(p_str1, BOOST_IOS::binary) );
> l_deflate.push( bio::file_source(p_str2, BOOST_IOS::binary) );
> 
> for unix shell I do this with:
> 
> cat file1.txt > tozip.txt
> cat file2.txt >> tozip.txt
> 
> How I can push a concatinated file to the deflate stream buffer?
> 
> Thanks 
> 
> Phil

Hi,

I see two options:

a) You write a new multi_file_source class which can any number of input
files.

b) Instead of working with a source, you could work with a sink at the
other end of the pipeline. Then just copy the content of the two files
into the stream.

Regards,

Roland