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EvtGenBase/EvtStreamInputIterator.hh
| Show All 34 Lines | |||||
| class EvtStreamInputIterator { | class EvtStreamInputIterator { | ||||
| public: | public: | ||||
| typedef input_iterator_tag iterator_category; | typedef input_iterator_tag iterator_category; | ||||
| typedef Point value_type; | typedef Point value_type; | ||||
| typedef ptrdiff_t difference_type; | typedef ptrdiff_t difference_type; | ||||
| typedef const Point* pointer; | typedef const Point* pointer; | ||||
| typedef const Point& reference; | typedef const Point& reference; | ||||
| EvtStreamInputIterator() : _counter( 0 ) {} | EvtStreamInputIterator() : m_counter( 0 ) {} | ||||
| EvtStreamInputIterator( const EvtStreamInputIterator& other ) : | EvtStreamInputIterator( const EvtStreamInputIterator& other ) : | ||||
| _counter( other._counter ? other._counter->clone() : 0 ), | m_counter( other.m_counter ? other.m_counter->clone() : 0 ), | ||||
| _currentValue( other._currentValue ) | m_currentValue( other.m_currentValue ) | ||||
| { | { | ||||
| } | } | ||||
| EvtStreamInputIterator( EvtStreamAdapter<Point>& counter ) : | EvtStreamInputIterator( EvtStreamAdapter<Point>& counter ) : | ||||
| _counter( counter.clone() ) | m_counter( counter.clone() ) | ||||
| { | { | ||||
| _currentValue = _counter->currentValue(); | m_currentValue = m_counter->currentValue(); | ||||
| } | } | ||||
| ~EvtStreamInputIterator() | ~EvtStreamInputIterator() | ||||
| { | { | ||||
| if ( _counter ) | if ( m_counter ) | ||||
| delete _counter; | delete m_counter; | ||||
| } | } | ||||
| reference operator*() const { return _currentValue; } | reference operator*() const { return m_currentValue; } | ||||
| EvtStreamInputIterator& operator++() | EvtStreamInputIterator& operator++() | ||||
| { | { | ||||
| _read(); | m_read(); | ||||
| return *this; | return *this; | ||||
| } | } | ||||
| EvtStreamInputIterator operator++( int ) | EvtStreamInputIterator operator++( int ) | ||||
| { | { | ||||
| EvtStreamInputIterator tmp = *this; | EvtStreamInputIterator tmp = *this; | ||||
| _read(); | m_read(); | ||||
| return tmp; | return tmp; | ||||
| } | } | ||||
| bool operator==( const EvtStreamInputIterator& other ) const | bool operator==( const EvtStreamInputIterator& other ) const | ||||
| { | { | ||||
| // Equality is only defined for two past the end iterators | // Equality is only defined for two past the end iterators | ||||
| return ( pastEnd() && other.pastEnd() ); | return ( pastEnd() && other.pastEnd() ); | ||||
| } | } | ||||
| protected: | protected: | ||||
| EvtStreamAdapter<Point>* _counter; | EvtStreamAdapter<Point>* m_counter; | ||||
| value_type _currentValue; | value_type m_currentValue; | ||||
| bool pastEnd() const | bool pastEnd() const | ||||
| { | { | ||||
| bool ret = true; | bool ret = true; | ||||
| if ( _counter ) | if ( m_counter ) | ||||
| ret = _counter->pastEnd(); | ret = m_counter->pastEnd(); | ||||
| return ret; | return ret; | ||||
| } | } | ||||
| // Advances the iterator | // Advances the iterator | ||||
| void _read() | void m_read() | ||||
| { | { | ||||
| _counter->advance(); | m_counter->advance(); | ||||
| _currentValue = _counter->currentValue(); | m_currentValue = m_counter->currentValue(); | ||||
| } | } | ||||
| }; | }; | ||||
| // For adaptable generators these shorthand functions can be used | // For adaptable generators these shorthand functions can be used | ||||
| // to construct iterators. | // to construct iterators. | ||||
| template <class Generator> | template <class Generator> | ||||
| EvtStreamInputIterator<typename Generator::result_type> iter( Generator gen, | EvtStreamInputIterator<typename Generator::result_type> iter( Generator gen, | ||||
| int N = 0 ) | int N = 0 ) | ||||
| { | { | ||||
| typedef typename Generator::result_type Point; | typedef typename Generator::result_type Point; | ||||
| EvtGenStreamAdapter<Point, Generator> counter( gen, N ); | EvtGenStreamAdapter<Point, Generator> counter( gen, N ); | ||||
| return EvtStreamInputIterator<Point>( counter ); | return EvtStreamInputIterator<Point>( counter ); | ||||
| } | } | ||||
| #endif | #endif | ||||