Function FastUInt64ToBufferLeft

tensorflow/core/lib/strings/numbers.cc:169–178

}

size_t FastUInt64ToBufferLeft(uint64 i, char* buffer) {
  char* start = buffer;
  do {
    *buffer++ = ((i % 10) + '0');
    i /= 10;
  } while (i > 0);
  *buffer = 0;
  std::reverse(start, buffer);
  return buffer - start;
}

static const double kDoublePrecisionCheckMax = DBL_MAX / 1.000000000000001;