Function RlePreserveBufferSize

cpp/src/parquet/encoder.cc:442–449

static constexpr int32_t kInitialHashTableSize = 1 << 10;

int64_t RlePreserveBufferSize(int64_t num_values, int bit_width) {
  // Note: because of the way RleEncoder::CheckBufferFull()
  // is called, we have to reserve an extra "RleEncoder::MinBufferSize"
  // bytes. These extra bytes won't be used but not reserving them
  // would cause the encoder to fail.
  return ::arrow::util::RleBitPackedEncoder::MaxBufferSize(bit_width, num_values) +
         ::arrow::util::RleBitPackedEncoder::MinBufferSize(bit_width);
}

/// See the dictionary encoding section of
/// https://github.com/apache/parquet-format/blob/master/Encodings.md.  The encoding