Function DecodeInt96Timestamp

cpp/src/parquet/types.h:727–736

};

static inline DecodedInt96 DecodeInt96Timestamp(const parquet::Int96& i96) {
  // We do the computations in the unsigned domain to avoid unsigned behaviour
  // on overflow.
  DecodedInt96 result;
  result.days_since_epoch = i96.value[2] - static_cast<uint64_t>(kJulianToUnixEpochDays);
  result.nanoseconds = 0;

  memcpy(&result.nanoseconds, &i96.value, sizeof(uint64_t));
  return result;
}

static inline int64_t Int96GetNanoSeconds(const parquet::Int96& i96) {
  const auto decoded = DecodeInt96Timestamp(i96);