System.util.zlib.Deflate.deflateParams C# (CSharp) Méthode

        internal int deflateParams(ZStream strm, int _level, int _strategy){
            int err=Z_OK;

            if(_level == Z_DEFAULT_COMPRESSION){
                _level = 6;
            }
            if(_level < 0 || _level > 9 || 
                _strategy < 0 || _strategy > Z_HUFFMAN_ONLY) {
                return Z_STREAM_ERROR;
            }

            if(config_table[level].func!=config_table[_level].func &&
                strm.total_in != 0) {
                // Flush the last buffer:
                err = strm.deflate(Z_PARTIAL_FLUSH);
            }

            if(level != _level) {
                level = _level;
                max_lazy_match   = config_table[level].max_lazy;
                good_match       = config_table[level].good_length;
                nice_match       = config_table[level].nice_length;
                max_chain_length = config_table[level].max_chain;
            }
            strategy = _strategy;
            return err;
        }