Function TestNumbers

tensorflow/core/lib/strings/ordered_code_test.cc:136–160

template <typename T>
void TestNumbers(T multiplier) {
  // first test powers of 2 (and nearby numbers)
  for (T x = std::numeric_limits<T>().max(); x != 0; x /= 2) {
    TestWriteRead(multiplier * (x - 1));
    TestWriteRead(multiplier * x);
    if (x != std::numeric_limits<T>::max()) {
      TestWriteRead(multiplier * (x + 1));
    } else if (multiplier < 0 && multiplier == -1) {
      TestWriteRead(-x - 1);
    }
  }

  random::PhiloxRandom philox(301, 17);
  random::SimplePhilox rnd(&philox);
  for (int bits = 1; bits <= std::numeric_limits<T>().digits; ++bits) {
    // test random non-negative numbers with given number of significant bits
    const uint64 mask = (~0ULL) >> (64 - bits);
    for (int i = 0; i < 1000; i++) {
      T x = rnd.Rand64() & mask;
      TestWriteRead(multiplier * x);
      T y = rnd.Rand64() & mask;
      TestWriteAppends(multiplier * x, multiplier * y);
    }
  }
}

// Return true iff 'a' is "before" 'b'
bool CompareStrings(const string& a, const string& b) { return (a < b); }