Method bit_width

cpp/src/parquet/encoder.cc:504–508

The minimum bit width required to encode the currently buffered indices.

  /// The minimum bit width required to encode the currently buffered indices.
  int bit_width() const override {
    if (ARROW_PREDICT_FALSE(num_entries() == 0)) return 0;
    if (ARROW_PREDICT_FALSE(num_entries() == 1)) return 1;
    return bit_util::Log2(num_entries());
  }

  /// Encode value. Note that this does not actually write any data, just
  /// buffers the value's index to be written later.