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UnitsExtension.cpp

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#include <fstream>
#include "UnitsExtension.h"

bool UnitsExtension::addUnit(std::string name, double factor) {
  if (existsUnit(name))
    return false;

  UnitsObject unit(name, factor);
  unitVector.push_back(unit);
  return true;
}

bool UnitsExtension::existsUnit(std::string name) {
  std::vector <UnitsObject>::iterator itr;
  itr = unitVector.begin();
  while (itr!=unitVector.end()) {
    if ((*itr).getName() == name) {
      return true;
    } // if
    itr++;
  } // while
  return false;
}

double UnitsExtension::getFactor(std::string name) {
  std::vector <UnitsObject>::iterator itr;
  itr = unitVector.begin();
  while (itr!=unitVector.end()) {
    if ((*itr).getName() == name) {
      return (*itr).getFactor();
    }
    itr++;
  }
  return 0;
}

bool UnitsExtension::getUnits(std::string definitionFile) {
  // Parse file and build vector-table.
  unitVector.clear();

  std::ifstream inputFile(definitionFile.c_str());
  if (inputFile.fail())
    return false;

  while (!inputFile.fail() && !inputFile.eof()) {
    double unitQuantity;
    inputFile >> unitQuantity;
    if (inputFile.fail()) {
      return false;
    }

    std::string unitName;
    inputFile >> unitName;
    if (inputFile.fail()) {
      return false;
    }

    std::string equalChar;
    inputFile >> equalChar;
    if (inputFile.fail() || (equalChar != "=")) {
      return false;
    }

    double factor;
    inputFile >> factor;
    if (inputFile.fail()) {
      return false;
    }

    //everything is here, so create Entry...
    double quantity = (factor / unitQuantity);   // = real factor according to quantitiy
    addUnit(unitName, quantity);
  } // while
  inputFile.close();
  return true;
}

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