Method formatTime

src/Monitoring/Unit.cpp:21–59

SIUnit::SIUnit(const std::string& unit, bool binary) : unit(unit), binary(binary) {}

std::string SIUnit::formatTime(double value, bool exact, int digits) const {
  const double byDay = std::floor(value / (60 * 60 * 24));
  const double hours = value - byDay * (60 * 60 * 24);
  const double byHour = std::floor(hours / (60 * 60));
  const double minutes = hours - byHour * (60 * 60);
  const double byMinute = std::floor(minutes / 60);
  const double seconds = minutes - byMinute * (60);

  std::ostringstream stream;
  stream.precision(0);
  stream << std::fixed;
  bool done = false;
  if (byDay > 0 && (!done || exact)) {
    stream << byDay << " d";
    done = true;
  }
  if (byHour > 0 && (!done || exact)) {
    if (done) {
      stream << " ";
    }
    stream << byHour << " h";
    done = true;
  }
  if (byMinute > 0 && (!done || exact)) {
    if (done) {
      stream << " ";
    }
    stream << byMinute << " min";
    done = true;
  }
  if (seconds != 0 || !done || exact) {
    if (done) {
      stream << " ";
    }
    stream << formatPrefix(seconds, digits);
    done = true;
  }
  return stream.str();
}

std::string SIUnit::formatPrefix(double value, int digits) const {
  double mantissa = std::abs(value);