#include <tstringid.h>

#include <QMutex>

#include <QMutexLocker>

//---------------------------------------------------------

struct TStringId::StaticData {

  Map map;

  std::vector<Iterator> iterators;

  Iterator none;

  QMutex mutex;

  StaticData() {

    map[std::string()] = 0;

    none = map.begin();

    iterators.push_back(none);

  }

  static StaticData& instance() {

    static StaticData data;

    return data;

  }

};

//---------------------------------------------------------

const TStringId::Iterator&

TStringId::none()

  { return StaticData::instance().none; }

//---------------------------------------------------------

TStringId::Iterator

TStringId::genIter(const std::string &str) {

  StaticData &data = StaticData::instance();

  if (str.empty()) return data.none;

  QMutexLocker lock(&data.mutex);

  Iterator i = data.map.find(str);

  if (i == data.map.end()) {

    i = data.map.insert(std::pair<std::string, int>(str, (int)data.iterators.size())).first;

    data.iterators.push_back(i);

  }

  return i;

}

//---------------------------------------------------------

TStringId::Iterator

TStringId::findIter(int id) {

  StaticData &data = StaticData::instance();

  if (id <= 0) return data.none;

  QMutexLocker lock(&data.mutex);

  return id < (int)data.iterators.size() ? data.iterators[id] : data.none;

}

//---------------------------------------------------------

TStringId::Iterator

TStringId::findIter(const std::string &str) {

  StaticData &data = StaticData::instance();

  if (str.empty()) return data.none;

  QMutexLocker lock(&data.mutex);

  Iterator i = data.map.find(str);

  return i == data.map.end() ? data.none : i;

}

//---------------------------------------------------------