ArrayXYOfList< Value, L, X, Y > Class Template Reference

Public Member Functions
	ArrayXYOfList ()
void	clear ()
const Value &	value (unsigned int l, unsigned int x, unsigned int y)
unsigned int	erase (unsigned int l, unsigned int x, unsigned int y)
void	setValue (const Value &val, unsigned int l, unsigned int x, unsigned int y)
void	setValueNoNewLabel (const Value &val, unsigned int l, unsigned int x, unsigned int y)
bool	hasLabel (unsigned int l, unsigned int x, unsigned int y) const
void	getLabels (std::vector< unsigned int > &labels, unsigned int x, unsigned int y) const
unsigned int	nbLabels (unsigned int x, unsigned int y) const
void	display (ostream &, unsigned int, unsigned int, unsigned int)
unsigned long long	area () const

Private Types
typedef std::pair< DGtal::uint16_t, Value >	MyPair
typedef std::forward_list< MyPair >	MyList
typedef MyList::iterator	Iterator
typedef MyList::const_iterator	ConstIterator

Private Attributes
MyList	_data [X][Y]

Detailed Description

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>
class ArrayXYOfList< Value, L, X, Y >

Array[X][Y] of forward_list< pair<L,Value> > Another intermediate approach which favors less memory and more computation time.

Approximately same memory usage or 20% more as LabelledMap (for good values of N and M). Approximately 2 to 4 times slower than LabelledMap for most operations.

Note that 2000*2000*32 takes 216Mb.

Definition at line 256 of file testLabelledMap-benchmark.cpp.

Member Typedef Documentation

ConstIterator

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

typedef MyList::const_iterator ArrayXYOfList< Value, L, X, Y >::ConstIterator

private

Definition at line 260 of file testLabelledMap-benchmark.cpp.

Iterator

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

typedef MyList::iterator ArrayXYOfList< Value, L, X, Y >::Iterator

private

Definition at line 259 of file testLabelledMap-benchmark.cpp.

MyList

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

typedef std::forward_list<MyPair> ArrayXYOfList< Value, L, X, Y >::MyList

private

Definition at line 258 of file testLabelledMap-benchmark.cpp.

MyPair

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

typedef std::pair<DGtal::uint16_t, Value> ArrayXYOfList< Value, L, X, Y >::MyPair

private

Definition at line 257 of file testLabelledMap-benchmark.cpp.

Constructor & Destructor Documentation

ArrayXYOfList()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

ArrayXYOfList< Value, L, X, Y >::ArrayXYOfList ( )

inline

Definition at line 265 of file testLabelledMap-benchmark.cpp.

  {
  }

Member Function Documentation

area()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

unsigned long long ArrayXYOfList< Value, L, X, Y >::area ( ) const

inline

Definition at line 379 of file testLabelledMap-benchmark.cpp.

  {
    unsigned long long total = 0;
    for ( unsigned int y = 0; y < Y; ++y )
      for ( unsigned int x = 0; x < X; ++x )
        {
          unsigned int size = nbLabels( x, y );
          total += sizeof( Value* )
            + ( size ) *
            ( sizeof( Value ) // one value per node
              + sizeof( Value* ) // one pointers
              + 2 // uint16_t
              + 8 // dynamic allocation );
              );
        }
    return total;
  }

References nbLabels().

clear()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

void ArrayXYOfList< Value, L, X, Y >::clear ( )

inline

Definition at line 270 of file testLabelledMap-benchmark.cpp.

  {
      for ( unsigned int y = 0; y < Y; ++y )
        for ( unsigned int x = 0; x < X; ++x )
          _data[ x ][ y ].clear();
  }

References _data, and clear().

Referenced by clear().

display()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

void ArrayXYOfList< Value, L, X, Y >::display ( ostream & , unsigned int , unsigned int , unsigned int  )

inline

Definition at line 374 of file testLabelledMap-benchmark.cpp.

  {}

erase()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

unsigned int ArrayXYOfList< Value, L, X, Y >::erase ( unsigned int l, unsigned int x, unsigned int y )

inline

Definition at line 291 of file testLabelledMap-benchmark.cpp.

  {
    MyList & list = _data[ x ][ y ];
    Iterator it_prev = list.before_begin();
    Iterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        if ( it->first == l )
          {
            list.erase_after( it_prev );
            return 1;
          }
        it_prev = it;
      }
    return 0;
  }

References _data.

getLabels()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

void ArrayXYOfList< Value, L, X, Y >::getLabels ( std::vector< unsigned int > & labels, unsigned int x, unsigned int y ) const

inline

Definition at line 352 of file testLabelledMap-benchmark.cpp.

  {
    labels.clear();
    const MyList & list = _data[ x ][ y ];
    ConstIterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        labels.push_back( (*it).first );
      }
  }

References _data.

hasLabel()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

bool ArrayXYOfList< Value, L, X, Y >::hasLabel ( unsigned int l, unsigned int x, unsigned int y ) const

inline

Definition at line 341 of file testLabelledMap-benchmark.cpp.

  {
    const MyList & list = _data[ x ][ y ];
    ConstIterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        if ( it->first == l ) return true;
      }
    return false;
  }

References _data.

nbLabels()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

unsigned int ArrayXYOfList< Value, L, X, Y >::nbLabels ( unsigned int x, unsigned int y ) const

inline

Definition at line 364 of file testLabelledMap-benchmark.cpp.

  {
    const MyList & list = _data[ x ][ y ];
    ConstIterator it = list.begin(), it_end = list.end(); 
    unsigned int n = 0;
    for ( ; it != it_end; ++it )
      ++n;
    return n;
  }

References _data.

Referenced by area().

setValue()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

void ArrayXYOfList< Value, L, X, Y >::setValue ( const Value & val, unsigned int l, unsigned int x, unsigned int y )

inline

Definition at line 309 of file testLabelledMap-benchmark.cpp.

  {
    MyList & list = _data[ x ][ y ];
    Iterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        if ( it->first == l ) 
          {
            it->second = val;
            return;
          }
      }
    if ( it == it_end ) 
        list.emplace_front( std::make_pair( l, val ) );
  }

References _data.

setValueNoNewLabel()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

void ArrayXYOfList< Value, L, X, Y >::setValueNoNewLabel ( const Value & val, unsigned int l, unsigned int x, unsigned int y )

inline

Definition at line 325 of file testLabelledMap-benchmark.cpp.

  {
    MyList & list = _data[ x ][ y ];
    Iterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        if ( it->first == l ) 
          {
            it->second = val;
            return;
          }
      }
    if ( it == it_end ) 
      list.emplace_front( std::make_pair( l, val ) );
  }

References _data.

value()

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

const Value & ArrayXYOfList< Value, L, X, Y >::value ( unsigned int l, unsigned int x, unsigned int y )

inline

Definition at line 278 of file testLabelledMap-benchmark.cpp.

  {
    MyList & list = _data[ x ][ y ];
    Iterator it = list.begin(), it_end = list.end(); 
    for ( ; it != it_end; ++it )
      {
        if ( it->first == l ) return it->second;
      }
    ASSERT ( it == it_end ) ;
    list.emplace_front( std::make_pair( l, Value() ) );
    return list.front().second;
  }

References _data.

Field Documentation

_data

template<typename Value, unsigned int L, unsigned int X, unsigned int Y>

MyList ArrayXYOfList< Value, L, X, Y >::_data[X][Y]

private

Definition at line 261 of file testLabelledMap-benchmark.cpp.

Referenced by clear(), erase(), getLabels(), hasLabel(), nbLabels(), setValue(), setValueNoNewLabel(), and value().

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The documentation for this class was generated from the following file:

• testLabelledMap-benchmark.cpp