Method PushValue

cpp/src/arrow/csv/parser.cc:209–223

      : ValueDescWriter(pool, /*values_capacity=*/2 + num_rows * num_cols) {}

  void PushValue(ParsedValueDesc v) {
    DCHECK_LT(values_size_, values_capacity_);
    values_[values_size_] = v;
    // We must take care not to write past the buffer's end if the line being
    // parsed has more than `num_cols` columns. The obvious solution of setting
    // an error status hurts too much on benchmarks, which is why we instead
    // cap `values_size_` to stay inside the buffer.
    //
    // Not setting an error immediately is not a problem since the `num_cols`
    // mismatch is detected later in ParseLine.
    //
    // Note that we want `values_size_` to reflect the number of written values
    // in the nominal case, which is why we choose a slightly larger `values_capacity_`.
    values_size_ += (values_size_ != values_capacity_ - 1);
  }
};

}  // namespace