Esempio n. 1
0
        static bool compress( T2 &buffer_out, const T1 &buffer_in, bool highest_compression = true )
        {
            static const bool verbose = false;

            bool ret = false;

            if( 1 )
            {
                // resize to worst case
                buffer_out.resize( LZ4_compressBound((int)(buffer_in.size())) );

                // compress
                size_t compressed_size = highest_compression ?
                    LZ4_compressHC( &buffer_in.at(0), &buffer_out.at(0), buffer_in.size() )
                    :
                    LZ4_compress( &buffer_in.at(0), &buffer_out.at(0), buffer_in.size() );

                ret = ( compressed_size > 0 && compressed_size < buffer_in.size() );

                if( ret )
                {
                    // if ok, resize properly to unused space
                    buffer_out.resize( compressed_size );
                }

                if( verbose )
                {
//                    std::cout << moon9::echo( ret, compressed_size, buffer_in.size() );
                }
            }

            return ret;
        }
Esempio n. 2
0
        static bool compress( T2 &buffer_out, const T1 &buffer_in, bool highest_compression = true )
        {
            static const bool verbose = false;

            bool ret = false;

            if( buffer_in.size() >= 70 )
            {
                buffer_out.resize( std::max<size_t>( size_t(buffer_in.size() * 1.05), 70 ) );

                size_t compressed_size = fastlz_compress_level( highest_compression ? 2 : 1, &buffer_in.at(0), buffer_in.size(), &buffer_out.at(0) );

                ret = ( compressed_size > 0 && compressed_size < buffer_in.size() );

                if( ret )
                {
                    buffer_out.resize( compressed_size );
                }

                if( verbose )
                {
//                    std::cout << moon9::echo( ret, compressed_size, buffer_in.size() );
                }
            }

            return ret;
        }
Esempio n. 3
0
	void copy_vector(const T1& v1, T2& v2)
	{
		const typename T1::size_type count = v1.size();

		v2.resize(count);

		for (typename T1::size_type i = 0 ; i < count ; ++i)
			v2[i] = v1[i];
	}