/usr/include/dune/grid/geometrygrid/iterator.hh is in libdune-grid-dev 2.3.1-1.
This file is owned by root:root, with mode 0o644.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GEOGRID_ITERATOR_HH
#define DUNE_GEOGRID_ITERATOR_HH
#include <dune/geometry/referenceelements.hh>
#include <dune/grid/geometrygrid/declaration.hh>
#include <dune/grid/geometrygrid/entitypointer.hh>
namespace Dune
{
namespace GeoGrid
{
// Internal Forward Declarations
// -----------------------------
template< class Traits, bool fake = Traits::fake >
class Iterator;
template< class Grid >
class HierarchicIterator;
// PartitionIteratorFilter
// -----------------------
template< int codim, PartitionIteratorType pitype, class Grid >
struct PartitionIteratorFilter;
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, Interior_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = Interior_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
const int size = refElement.size( subEntity, codim, dimension );
for( int i = 0; i < size; ++i )
{
const int j = refElement.subEntity( subEntity, codim, i, dimension );
PartitionType type = element.template subEntity< dimension >( j )->partitionType();
if( type == InteriorEntity )
return true;
}
return false;
}
};
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, InteriorBorder_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = Interior_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
return true;
}
};
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, Overlap_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = Overlap_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
if( element.partitionType() == InteriorEntity )
return true;
const int size = refElement.size( subEntity, codim, dimension );
for( int i = 0; i < size; ++i )
{
const int j = refElement.subEntity( subEntity, codim, i, dimension );
PartitionType type = element.template subEntity< dimension >( j )->partitionType();
if( (type == OverlapEntity) || (type == BorderEntity) )
return true;
}
return false;
}
};
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, OverlapFront_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = Overlap_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
return true;
}
};
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, All_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = All_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
return true;
}
};
template< int codim, class Grid >
struct PartitionIteratorFilter< codim, Ghost_Partition, Grid >
{
static const int dimension = remove_const< Grid >::type::dimension;
static const int codimension = codim;
static const PartitionIteratorType Element_Partition = Ghost_Partition;
typedef typename remove_const< Grid >::type::ctype ctype;
typedef typename remove_const< Grid >::type::Traits::template Codim< 0 >::Entity Element;
typedef ReferenceElement< ctype, dimension > RefElement;
static bool apply ( const RefElement &refElement,
const Element &element, int subEntity )
{
const int size = refElement.size( subEntity, codim, dimension );
for( int i = 0; i < size; ++i )
{
const int j = refElement.subEntity( subEntity, codim, i, dimension );
PartitionType type = element.template subEntity< dimension >( j )->partitionType();
if( type == GhostEntity )
return true;
}
return false;
}
};
// IteratorTraits
// --------------
template< class HostGridView, int codim, PartitionIteratorType pitype, class Grid >
struct IteratorTraits
: public EntityPointerTraits< codim, Grid >
{
typedef typename EntityPointerTraits< codim, Grid >::HostGrid HostGrid;
typedef PartitionIteratorFilter< codim, pitype, HostGrid > Filter;
static const PartitionIteratorType Entity_Partition = pitype;
static const PartitionIteratorType Element_Partition = Filter::Element_Partition;
typedef typename HostGridView::template Codim< codim >
::template Partition< Entity_Partition >::Iterator
HostEntityIterator;
typedef typename HostGridView::template Codim< 0 >
::template Partition< Element_Partition >::Iterator
HostElementIterator;
typedef typename HostGridView::IndexSet HostIndexSet;
enum IteratorType { begin, end };
};
// Iterator (real)
// ---------------
template< class Traits >
class Iterator< Traits, false >
: public EntityPointer< Traits, false >
{
typedef EntityPointer< Traits, false > Base;
typedef typename Traits::Grid Grid;
public:
typedef typename Traits::IteratorType IteratorType;
using Base::codimension;
protected:
typedef typename Base::EntityImpl EntityImpl;
using Base::hostEntityIterator_;
using Base::entityImpl;
using Base::grid;
public:
template< class HostGridView >
Iterator ( const Grid &grid, const HostGridView &hostGridView, IteratorType type )
: Base( grid, (type == Traits::begin ? hostGridView.template begin< codimension, Traits::Entity_Partition >()
: hostGridView.template end< codimension, Traits::Entity_Partition >()) )
{}
void increment ()
{
++hostEntityIterator_;
entityImpl() = EntityImpl( grid() );
}
};
// Iterator (fake)
// ---------------
template< class Traits >
class Iterator< Traits, true >
: public EntityPointer< Traits, true >
{
typedef EntityPointer< Traits, true > Base;
typedef typename Traits::Grid Grid;
public:
static const int dimension = Traits::dimension;
static const int codimension = Traits::codimension;
typedef typename Traits::IteratorType IteratorType;
private:
typedef typename Traits::Filter Filter;
typedef typename Traits::HostElement HostElement;
typedef typename Traits::HostElementIterator HostElementIterator;
typedef typename Traits::HostIndexSet HostIndexSet;
protected:
typedef typename Base::EntityImpl EntityImpl;
using Base::hostElementIterator_;
using Base::entityImpl;
using Base::grid;
public:
template< class HostGridView >
Iterator ( const Grid &grid, const HostGridView &hostGridView, IteratorType type )
: Base( grid, (type == Traits::begin ? hostGridView.template begin< 0, Traits::Element_Partition >()
: hostGridView.template end< 0, Traits::Element_Partition >()), -1 ),
hostEnd_( hostGridView.template end< 0, Traits::Element_Partition >() ),
hostIndexSet_( &hostGridView.indexSet() )
{
if( hostElementIterator_ != hostEnd_ )
{
visited_.resize( hostIndexSet_->size( codimension ), false );
increment();
}
}
void increment ()
{
typedef typename Traits::ctype ctype;
int subEntity = this->subEntity();
while( hostElementIterator_ != hostEnd_ )
{
const HostElement &hostElement = *hostElementIterator_;
const ReferenceElement< ctype, dimension > &refElement
= ReferenceElements< ctype, dimension >::general( hostElement.type() );
++subEntity;
const int count = refElement.size( codimension );
for( ; subEntity < count; ++subEntity )
{
if( !Filter::apply( refElement, hostElement, subEntity ) )
continue;
const size_t index = hostIndexSet_->subIndex( hostElement, subEntity, codimension );
if( !visited_[ index ] )
{
visited_[ index ] = true;
entityImpl() = EntityImpl( grid(), subEntity );
return;
}
}
++hostElementIterator_;
subEntity = -1;
}
entityImpl() = EntityImpl( grid(), subEntity );
}
private:
HostElementIterator hostEnd_;
const HostIndexSet *hostIndexSet_;
std::vector< bool > visited_;
};
// HierarchicIteratorTraits
// ------------------------
template< class Grid >
struct HierarchicIteratorTraits
: public EntityPointerTraits< 0, Grid >
{
typedef typename remove_const< Grid >::type::Traits Traits;
typedef typename Traits::HostGrid::Traits::HierarchicIterator HostEntityIterator;
typedef typename Traits::HostGrid::Traits::HierarchicIterator HostElementIterator;
};
// HierarchicIterator
// ------------------
template< class Grid >
class HierarchicIterator
: public EntityPointer< HierarchicIteratorTraits< Grid > >
{
typedef HierarchicIteratorTraits< Grid > Traits;
typedef EntityPointer< Traits > Base;
protected:
typedef typename Base::EntityImpl EntityImpl;
typedef typename Traits::HostEntityIterator HostEntityIterator;
using Base::hostEntityIterator_;
using Base::entityImpl;
using Base::grid;
public:
HierarchicIterator ( const Grid &grid,
const HostEntityIterator &hostEntityIterator )
: Base( grid, hostEntityIterator )
{}
void increment ()
{
++hostEntityIterator_;
entityImpl() = EntityImpl( grid() );
}
};
} // namespace GeoGrid
} // namespace Dune
#endif // #ifndef DUNE_GEOGRID_ITERATOR_HH
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