Re: [Boost-users] Iostreams - GZip problem

From: gchen (chengang31_at_[hidden])
Date: 2007-04-02 14:39:09

Jabin Reinhold wrote:
> 
> My issue is that at the end of the code, test1.xml(~10k) and test2.xml(~12k)
> are not identical. Test2.xml has some extraneous characters added to the end
> (~2k worth). I assume these are leftovers from a memcopy somewhere, but I’m
> not sure why. I have the same effect when I use zlib_compressor as well.
> What is wrong with my usage of the library(s)?
> 
> 
> if(true)
> {
>       //Scope used to ensure that the archive is fully processed
>       std::ofstream file("c:\\test.gz", std::ios_base::out |
> std::ios_base::binary);

Should that be a iostreams::file_sink?

>       boost::iostreams::filtering_streambuf<boost::iostreams::output>
> outStream;
>       outStream.push(boost::iostreams::gzip_compressor());
>       outStream.push(file);
>       boost::iostreams::copy(sStream, outStream);
> }
> 

Try this:

boost::iostreams::filtering_streambuf<boost::iostreams::output> > outStream;
outStream.push(boost::iostreams::gzip_compressor());
outStream.push(boost::iostreams::file_sink("c:\\test.gz", 
std::ios::binary));
boost::iostreams::copy(sStream, outStream);