if (!line_reader->has_next())
        return;

    SGVector<char> line=line_reader->read_string();

    CReader* reader=new CStringReader(line, tokenizer);
    SGVector<sg_type> result(len);
    for (int32_t i=0; i<len; i++)
    {
        result[i]=reader->readf();
    }
    vec=SGVector<sg_type>::clone_vector(result.vector, result.vlen);
    SG_UNREF(reader);