60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
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#include "CommStation.hxx"
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#include <map>
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namespace {
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typedef std::multimap<int, flightgear::CommStation*> FrequencyMap;
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static FrequencyMap static_frequencies;
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typedef std::pair<FrequencyMap::const_iterator, FrequencyMap::const_iterator> FrequencyMapRange;
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} // of anonymous namespace
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namespace flightgear {
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CommStation::CommStation(const std::string& name, FGPositioned::Type t, const SGGeod& pos, int range, int freq) :
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FGPositioned(t, name, pos),
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mRangeNM(range),
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mFreqKhz(freq),
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mAirport(NULL)
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{
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static_frequencies.insert(std::make_pair(freq, this));
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init(true);
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}
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void CommStation::setAirport(FGAirport* apt)
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{
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mAirport = apt;
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}
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double CommStation::freqMHz() const
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{
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return mFreqKhz / 100.0;
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}
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CommStation*
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CommStation::findByFreq(int freqKhz, const SGGeod& pos, FGPositioned::Filter* filt)
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{
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FrequencyMapRange range = static_frequencies.equal_range(freqKhz);
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FGPositioned::List results;
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for (; range.first != range.second; ++range.first) {
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CommStation* sta = range.first->second;
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if (filt && !filt->pass(sta)) {
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continue; // filtered out
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}
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results.push_back(sta);
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}
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if (results.empty()) {
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return NULL;
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}
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FGPositioned::sortByRange(results, pos);
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return (CommStation*) results.front().ptr();
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}
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} // of namespace flightgear
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