Method GetBatch

cpp/src/arrow/util/rle_bitmap_internal.h:238–243

Get a batch of values return the number of decoded elements. May write fewer elements to the output than requested if there are not enough values left.

  /// May write fewer elements to the output than requested if there are not enough values
  /// left.
  [[nodiscard]] rle_size_t GetBatch(BitmapSpanMut out, rle_size_t batch_size) {
    auto n_vals = GetAdvanceCapacity(batch_size);
    arrow::internal::CopyBitmap(unread_values_ptr(), unread_values_bit_offset(), n_vals,
                                out.data(), out.bit_start());
    return Advance(n_vals);
  }

 private:
  /// The pointer to the beginning of the run