/usr/include/dune/grid/albertagrid/level.hh is in libdune-grid-dev 2.4.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_ALBERTA_LEVEL_HH
#define DUNE_ALBERTA_LEVEL_HH
#include <cassert>
#include <cstdlib>
#include <dune/grid/albertagrid/meshpointer.hh>
#include <dune/grid/albertagrid/dofadmin.hh>
#include <dune/grid/albertagrid/dofvector.hh>
#if HAVE_ALBERTA
namespace Dune
{
// AlbertaGridLevelProvider
// ------------------------
template< int dim >
class AlbertaGridLevelProvider
{
typedef AlbertaGridLevelProvider< dim > This;
typedef unsigned char Level;
typedef Alberta::DofVectorPointer< Level > DofVectorPointer;
typedef Alberta::DofAccess< dim, 0 > DofAccess;
typedef Alberta::FillFlags< dim > FillFlags;
static const Level isNewFlag = (1 << 7);
static const Level levelMask = (1 << 7) - 1;
class SetLocal;
class CalcMaxLevel;
template< Level flags >
struct ClearFlags;
struct Interpolation;
public:
typedef Alberta::ElementInfo< dim > ElementInfo;
typedef Alberta::MeshPointer< dim > MeshPointer;
typedef Alberta::HierarchyDofNumbering< dim > DofNumbering;
Level operator() ( const Alberta::Element *element ) const
{
const Level *array = (Level *)level_;
return array[ dofAccess_( element, 0 ) ] & levelMask;
}
Level operator() ( const ElementInfo &elementInfo ) const
{
return (*this)( elementInfo.el() );
}
bool isNew ( const Alberta::Element *element ) const
{
const Level *array = (Level *)level_;
return ((array[ dofAccess_( element, 0 ) ] & isNewFlag) != 0);
}
bool isNew ( const ElementInfo &elementInfo ) const
{
return isNew( elementInfo.el() );
}
Level maxLevel () const
{
CalcMaxLevel calcFromCache;
level_.forEach( calcFromCache );
#ifndef NDEBUG
CalcMaxLevel calcFromGrid;
mesh().leafTraverse( calcFromGrid, FillFlags::nothing );
assert( calcFromCache.maxLevel() == calcFromGrid.maxLevel() );
#endif
return calcFromCache.maxLevel();;
}
MeshPointer mesh () const
{
return MeshPointer( level_.dofSpace()->mesh );
}
void markAllOld ()
{
ClearFlags< isNewFlag > clearIsNew;
level_.forEach( clearIsNew );
}
void create ( const DofNumbering &dofNumbering )
{
const Alberta::DofSpace *const dofSpace = dofNumbering.dofSpace( 0 );
dofAccess_ = DofAccess( dofSpace );
level_.create( dofSpace, "Element level" );
assert( level_ );
level_.template setupInterpolation< Interpolation >();
SetLocal setLocal( level_ );
mesh().hierarchicTraverse( setLocal, FillFlags::nothing );
}
void release ()
{
level_.release();
dofAccess_ = DofAccess();
}
private:
DofVectorPointer level_;
DofAccess dofAccess_;
};
// AlbertaGridLevelProvider::SetLocal
// ----------------------------------
template< int dim >
class AlbertaGridLevelProvider< dim >::SetLocal
{
DofVectorPointer level_;
DofAccess dofAccess_;
public:
explicit SetLocal ( const DofVectorPointer &level )
: level_( level ),
dofAccess_( level.dofSpace() )
{}
void operator() ( const Alberta::ElementInfo< dim > &elementInfo ) const
{
Level *const array = (Level *)level_;
array[ dofAccess_( elementInfo, 0 ) ] = elementInfo.level();
}
};
// AlbertaGridLevelProvider::CalcMaxLevel
// --------------------------------------
template< int dim >
class AlbertaGridLevelProvider< dim >::CalcMaxLevel
{
Level maxLevel_;
public:
CalcMaxLevel ()
: maxLevel_( 0 )
{}
void operator() ( const Level &dof )
{
maxLevel_ = std::max( maxLevel_, Level( dof & levelMask ) );
}
void operator() ( const Alberta::ElementInfo< dim > &elementInfo )
{
maxLevel_ = std::max( maxLevel_, Level( elementInfo.level() ) );
}
Level maxLevel () const
{
return maxLevel_;
}
};
// AlbertaGridLevelProvider::ClearFlags
// ------------------------------------
template< int dim >
template< typename AlbertaGridLevelProvider< dim >::Level flags >
struct AlbertaGridLevelProvider< dim >::ClearFlags
{
void operator() ( Level &dof ) const
{
dof &= ~flags;
}
};
// AlbertaGridLevelProvider::Interpolation
// ---------------------------------------
template< int dim >
struct AlbertaGridLevelProvider< dim >::Interpolation
{
static const int dimension = dim;
typedef Alberta::Patch< dimension > Patch;
static void interpolateVector ( const DofVectorPointer &dofVector,
const Patch &patch )
{
const DofAccess dofAccess( dofVector.dofSpace() );
Level *array = (Level *)dofVector;
for( int i = 0; i < patch.count(); ++i )
{
const Alberta::Element *const father = patch[ i ];
assert( (array[ dofAccess( father, 0 ) ] & levelMask) < levelMask );
const Level childLevel = (array[ dofAccess( father, 0 ) ] + 1) | isNewFlag;
for( int i = 0; i < 2; ++i )
{
const Alberta::Element *child = father->child[ i ];
array[ dofAccess( child, 0 ) ] = childLevel;
}
}
}
};
}
#endif // #if HAVE_ALBERTA
#endif
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