Re: [Boost-users] concat files for compression

Subject: Re: [Boost-users] concat files for compression
From: Philipp Kraus (philipp.kraus_at_[hidden])
Date: 2010-06-11 17:25:07

On 2010-06-11 09:34:27 +0200, Roland Bock said:

> 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.

Hi,

I think I would like to use the second idea, but how I can do this?

Thx

Phil