Function little_endian_array

cpp/src/arrow/util/basic_decimal.h:205–208

  }

  constexpr const WordArray little_endian_array() const {
    return bit_util::little_endian::FromNative(
        WordArray{static_cast<typename WordArray::value_type>(value_)});
  }

  const uint8_t* native_endian_bytes() const {
    return reinterpret_cast<const uint8_t*>(&value_);