/usr/include/dune/localfunctions/utility/interpolationhelper.hh is in libdune-localfunctions-dev 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | #ifndef GENERIC_INTERPOLATIONHELPER_HH
#define GENERIC_INTERPOLATIONHELPER_HH
#include <vector>
#include <dune/common/fvector.hh>
#include <dune/localfunctions/utility/field.hh>
namespace Dune
{
// A small helper class to avoid having to
// write the interpolation twice (once for function
// and once for a basis)
template< class F, unsigned int dimension >
struct InterpolationHelper
{
template <class Func,class Container, bool type>
struct Helper;
};
template <class F,unsigned int d>
template <class Func,class Vector>
struct InterpolationHelper<F,d>::Helper<Func,Vector,true>
// Func is of Function type
{
typedef std::vector< Dune::FieldVector<F,d> > Result;
Helper(const Func& func, Vector &vec)
: func_(func),
vec_(vec),
tmp_(1)
{}
const typename Vector::value_type &operator()(unsigned int row,unsigned int col)
{
return vec_[row];
}
template <class Fy>
void set(unsigned int row,unsigned int col,
const Fy &val)
{
assert(col==0);
assert(row<vec_.size());
field_cast( val, vec_[row] );
}
template <class Fy>
void add(unsigned int row,unsigned int col,
const Fy &val)
{
assert(col==0);
assert(row<vec_.size());
vec_[row] += field_cast<typename Vector::value_type>(val);
}
template <class DomainVector>
const Result &evaluate(const DomainVector &x) const
{
typename Func::DomainType xx ;
typename Func::RangeType ff ;
field_cast(x,xx);
func_.evaluate(xx,ff);
field_cast(ff, tmp_[0] );
return tmp_;
}
unsigned int size() const
{
return 1;
}
const Func &func_;
Vector &vec_;
mutable Result tmp_;
};
template <class F,unsigned int d>
template <class Basis,class Matrix>
struct InterpolationHelper<F,d>::Helper<Basis,Matrix,false>
// Func is of Basis type
{
typedef std::vector< Dune::FieldVector<F,d> > Result;
Helper(const Basis& basis, Matrix &matrix)
: basis_(basis),
matrix_(matrix),
tmp_(basis.size()) {
}
const F &operator()(unsigned int row,unsigned int col) const
{
return matrix_(row,col);
}
F &operator()(unsigned int row,unsigned int col)
{
return matrix_(row,col);
}
template <class Fy>
void set(unsigned int row,unsigned int col,
const Fy &val)
{
assert(col<matrix_.cols());
assert(row<matrix_.rows());
field_cast(val,matrix_(row,col));
}
template <class Fy>
void add(unsigned int row,unsigned int col,
const Fy &val)
{
assert(col<matrix_.cols());
assert(row<matrix_.rows());
matrix_(row,col) += val;
}
template <class DomainVector>
const Result &evaluate(const DomainVector &x) const
{
basis_.template evaluate<0>(x,tmp_);
return tmp_;
}
unsigned int size() const
{
return basis_.size();
}
const Basis &basis_;
Matrix &matrix_;
mutable Result tmp_;
};
}
#endif // GENERIC_INTERPOLATIONHELPER_HH
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