sfc-aqua / quisp / 8099990924

CSVParser::CSVParser(const string filename) {

  file.open(filename);

  if (!file.is_open()) throw cRuntimeError("Couldn't find CSV file!");

  string line;

  double key = 0;

  double val = 0;

  char sep;  // throwaway

  while (file >> line) {

    std::istringstream ss(line);

    ss >> key >> sep >> val;

    property.insert(std::pair<double, double>(key, val));

  }

  return;

}

double CSVParser::getPropertyAtTime(const double time) {

  if (time < getLowestDatapoint()) return getLowestDatavalue();

  if (time > getHighestDatapoint()) return getHighestDatavalue();

  if (time != last_polled_time) {

    last_polled_time = time;

    auto u_b = property.upper_bound(time);

    if (u_b == property.end()) {

      last_polled_value = (--u_b)->second;

    } else if (u_b == property.begin()) {

      last_polled_value = u_b->second;

    } else {

      auto l_b = u_b;

      --l_b;

      const double delta = (time - l_b->first) / (u_b->first - l_b->first);

      last_polled_value = delta * u_b->second + (1 - delta) * l_b->second;

    }

  }

  return last_polled_value;

}

int CSVParser::getLowestDatapoint() { return property.begin()->first; }

int CSVParser::getHighestDatapoint() { return property.rbegin()->first; }

double CSVParser::getLowestDatavalue() { return property.begin()->second; }

double CSVParser::getHighestDatavalue() { return property.rbegin()->second; }

CSVParser::~CSVParser() {}