Method AlmostEquals

tests/gtest/gtest.h:6769–6776

Returns true iff this number is at most kMaxUlps ULP's away from rhs. In particular, this function: - returns false if either number is (or both are) NAN. - treats really large numbers as almost equal to infinity. - thinks +0.0 and -0.0 are 0 DLP's apart.

  //   - treats really large numbers as almost equal to infinity.
  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
  bool AlmostEquals(const FloatingPoint& rhs) const {
    // The IEEE standard says that any comparison operation involving
    // a NAN must return false.
    if (is_nan() || rhs.is_nan()) return false;

    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
        <= kMaxUlps;
  }

 private:
  // The data type used to store the actual floating-point number.