/usr/include/dune/localfunctions/utility/basisevaluator.hh is in libdune-localfunctions-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_BASISEVALUATOR_HH
#define DUNE_BASISEVALUATOR_HH
#include <vector>
#include <dune/common/fmatrix.hh>
#include <dune/common/fvector.hh>
#include <dune/common/typetraits.hh>
#include <dune/geometry/genericgeometry/topologytypes.hh>
#include <dune/localfunctions/utility/field.hh>
#include <dune/localfunctions/utility/multiindex.hh>
#include <dune/localfunctions/utility/tensor.hh>
namespace Dune
{
/*******************************************
* Should be removed as soon as the Tensor
* classes have been revisited. See remarks
* in tensor.hh (also hold true here).
*******************************************/
template <class B>
struct MonomialEvaluator
{
typedef B Basis;
typedef typename Basis::Field Field;
typedef typename Basis::DomainVector DomainVector;
static const int dimension = Basis::dimension;
static const int dimRange = Basis::dimRange;
typedef std::vector<Field> Container;
template< class Deriv >
struct BaseIterator;
template <unsigned int deriv>
struct Iterator
{
typedef BaseIterator<Derivatives<Field,dimension,dimRange,deriv,derivative> > All;
typedef BaseIterator<Derivatives<Field,dimension,1,0,value> > Integrate;
};
unsigned int size() const
{
return size_;
}
protected:
MonomialEvaluator(const Basis &basis,unsigned int order,unsigned int size)
: basis_(basis),
order_(order),
size_(size),
container_(0)
{}
template <int deriv>
void resize()
{
const int totalSize = Derivatives<Field,dimension,dimRange,deriv,derivative>::size*size_;
container_.resize(totalSize);
}
MonomialEvaluator(const MonomialEvaluator&);
const Basis &basis_;
unsigned int order_,size_;
Container container_;
};
template< class B >
template< class Deriv >
struct MonomialEvaluator< B >::BaseIterator
{
typedef Deriv Derivatives;
typedef typename Deriv::Field Field;
static const unsigned int blockSize = Deriv::size;
typedef Dune::FieldVector<Field,blockSize> Block;
static const DerivativeLayout layout = Deriv::layout;
static const unsigned int dimDomain = Deriv::dimDomain;
static const unsigned int dimRange = Deriv::dimRange;
typedef std::vector<Field> Container;
typedef typename Container::iterator CIter;
explicit BaseIterator ( Container &container )
: pos_( container.begin() ),
end_( container.end() )
{}
const Deriv &operator*() const
{
assert(!done());
return reinterpret_cast<const Deriv&>(*pos_);
}
const Deriv *operator->() const
{
return &(operator*());
}
bool done () const
{
return pos_ == end_;
}
BaseIterator &operator++ ()
{
pos_ += blockSize;
return *this;
}
BaseIterator &operator+= ( unsigned int skip )
{
pos_ += skip*blockSize;
return *this;
}
private:
CIter pos_;
const CIter end_;
};
template< class B >
struct StandardEvaluator
: public MonomialEvaluator< B >
{
typedef B Basis;
typedef typename Basis::Field Field;
typedef typename Basis::DomainVector DomainVector;
typedef std::vector<Field> Container;
static const int dimension = Basis::dimension;
static const int dimRange = Basis::dimRange;
typedef MonomialEvaluator<B> Base;
template <unsigned int deriv>
struct Iterator : public Base::template Iterator<deriv>
{};
StandardEvaluator(const Basis &basis)
: Base(basis,basis.order(),basis.size())
{}
template <unsigned int deriv,class DVector>
typename Iterator<deriv>::All evaluate(const DVector &x)
{
Base::template resize<deriv>();
basis_.template evaluate<deriv>(x,&(container_[0]));
return typename Iterator<deriv>::All(container_);
}
typename Iterator<0>::Integrate integrate()
{
Base::template resize<0>();
basis_.integrate(&(container_[0]));
return typename Iterator<0>::Integrate(container_);
}
protected:
StandardEvaluator ( const Basis &basis, unsigned int size )
: Base( basis, basis.order(), size )
{}
private:
StandardEvaluator(const StandardEvaluator&);
using Base::basis_;
using Base::container_;
};
#if 0 // OLD OLD
template< class B, class Fill >
struct VecEvaluator
: public StandardEvaluator< B >
{
typedef B Basis;
typedef typename Basis::Field Field;
static const int dimension = Basis::dimension;
static const int dimRange = Basis::dimRange*Fill::dimRange;
typedef typename Basis::DomainVector DomainVector;
typedef std::vector<Field> Container;
typedef StandardEvaluator<B> Base;
template <unsigned int deriv>
struct Iterator
{
typedef typename Base::template BaseIterator<Derivatives<Field,dimension,dimRange,deriv,Fill::layout> > All;
};
VecEvaluator ( const Basis &basis, const Fill &fill )
: Base( basis, basis.size() ),
fill_( fill ),
size_( basis.size()*dimRange )
{}
template <unsigned int deriv>
typename Iterator<deriv>::All evaluate(const DomainVector &x)
{
resize< deriv >();
fill_.template apply<deriv>( x,Base::template evaluate<deriv>(x), vecContainer_ );
std::vector<Derivatives<Field,dimension,dimRange,deriv,Fill::layout> >& derivContainer =
reinterpret_cast<std::vector<Derivatives<Field,dimension,dimRange,deriv,Fill::layout> >&>(vecContainer_);
return typename Iterator<deriv>::All(derivContainer);
}
template <unsigned int deriv,class DVector>
typename Iterator<deriv>::All evaluate(const DVector &x)
{
resize< deriv >();
fill_.template apply<deriv>( x,Base::template evaluate<deriv>(x), vecContainer_ );
std::vector<Derivatives<Field,dimension,dimRange,deriv,Fill::layout> >& derivContainer =
reinterpret_cast<std::vector<Derivatives<Field,dimension,dimRange,deriv,Fill::layout> >&>(vecContainer_);
return typename Iterator<deriv>::All(derivContainer);
}
unsigned int size() const
{
return size_;
}
protected:
VecEvaluator ( const Basis &basis, const Fill &fill, unsigned int size )
: Base( basis, basis.size() ),
fill_( fill ),
size_( size )
{
resize< 2 >();
}
template <int deriv>
void resize()
{
const int totalSize = Derivatives<Field,dimension,dimRange,deriv,derivative>::size*size_;
vecContainer_.resize(totalSize);
}
VecEvaluator(const VecEvaluator&);
Container vecContainer_;
const Fill &fill_;
unsigned int size_;
};
template <int dimR,DerivativeLayout layout>
struct DiagonalFill;
template <int dimR>
struct DiagonalFill<dimR,derivative>
{
static const DerivativeLayout layout = derivative;
static const int dimRange = dimR;
template <int deriv, class Domain, class Iter,class Field>
void apply(const Domain &x,
Iter iter,std::vector<Field> &vecContainer) const
{
typedef std::vector<Field> Container;
typename Container::iterator vecIter = vecContainer.begin();
for ( ; !iter.done(); ++iter)
{
const typename Iter::Block &block = iter->block();
for (int r1=0; r1<dimR; ++r1)
{
unsigned int b = 0;
apply<Field>(r1,x,block,b,vecIter);
}
}
}
template <class Field, class Domain, class Block,class VecIter>
void apply(int r1, const Domain &x,
const Block &block,unsigned int &b,
VecIter &vecIter) const
{
unsigned int bStart = b;
unsigned int bEnd = b+Block::size;
apply<Field>(r1,x,block,bStart,bEnd,vecIter);
b=bEnd;
}
template <class Field, class Domain, class Block,class VecIter>
void apply(int r1, const Domain &x,const Block &block,
unsigned int bStart, unsigned int bEnd,
VecIter &vecIter) const
{
for (int r2=0; r2<dimR; ++r2)
{
for (unsigned int bb=bStart; bb<bEnd; ++bb)
{
*vecIter = (r1==r2 ? block[bb] : Field(0));
++vecIter;
}
}
}
};
template <int dimR>
struct DiagonalFill<dimR,value>
{
static const DerivativeLayout layout = value;
static const int dimRange = dimR;
template <int deriv, class Domain, class Iter,class Field>
void apply(const Domain &x,
Iter iter,std::vector<Field> &vecContainer) const
{
typedef std::vector<Field> Container;
typename Container::iterator vecIter = vecContainer.begin();
for ( ; !iter.done(); ++iter)
{
const typename Iter::Block &block = iter->block();
for (int r1=0; r1<dimR; ++r1)
{
unsigned int b = 0;
apply<Field>(integral_constant<int,deriv>(),r1,x,block,b,vecIter);
}
}
}
template <class Field, class Domain, class Block,class VecIter,int deriv>
void apply(const integral_constat<int,deriv>&, int r1, const Domain &x,
const Block &block,unsigned int &b,
VecIter &vecIter) const
{
apply<Field>(integral_constant<int,deriv-1>(),r1,x,block,b,vecIter);
unsigned int bStart = b;
unsigned int bEnd = b+LFETensor<Field,Domain::dimension,deriv>::size;
apply<Field>(r1,x,block,bStart,bEnd,vecIter);
b=bEnd;
}
template <class Field, class Domain, class Block,class VecIter>
void apply(const integral_constant<int,0>&, int r1, const Domain &x,
const Block &block,unsigned int &b,
VecIter &vecIter) const
{
apply<Field>(r1,x,block,b,b+1,vecIter);
++b;
}
template <class Field, class Domain, class Block,class VecIter>
void apply(int r1, const Domain &x,const Block &block,
unsigned int bStart, unsigned int bEnd,
VecIter &vecIter) const
{
for (int r2=0; r2<dimR; ++r2)
{
for (unsigned int bb=bStart; bb<bEnd; ++bb)
{
*vecIter = (r1==r2 ? block[bb] : Field(0));
++vecIter;
}
}
}
};
template <class B,int dimR,DerivativeLayout layout>
struct VectorialEvaluator
: public VecEvaluator<B,DiagonalFill<dimR,layout> >
{
typedef DiagonalFill<dimR,layout> Fill;
typedef VecEvaluator< B,Fill > Base;
VectorialEvaluator(const B &basis)
: Base(basis,fill_,basis.size()*dimR)
{}
private:
Fill fill_;
};
#endif // OLD OLD
}
#endif
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