/usr/include/dune/localfunctions/meta/power/coefficients.hh is in libdune-localfunctions-dev 2.4.1-1.
This file is owned by root:root, with mode 0o644.
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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 | // -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_LOCALFUNCTIONS_META_POWER_COEFFICIENTS_HH
#define DUNE_LOCALFUNCTIONS_META_POWER_COEFFICIENTS_HH
#include <cstddef>
#include <vector>
#include <dune/localfunctions/common/localkey.hh>
namespace Dune {
//! \brief Meta-coefficients turning a scalar coefficients into
//! vector-valued coefficients
/**
* \nosubgrouping
* \implements CoefficientsInterface
*/
class PowerCoefficients {
std::vector<LocalKey> keys;
public:
//! Construct a PowerCoefficients object
/**
* \param backend The backend coeficients object to raise to a power.
* \param power Power to raise the backend object to.
*
* The LocalKeys of the backend coefficients are copied into internal
* storage. The index member of each LocalKey is modified to keep them
* unique for instances of different power.
*/
template<class Backend>
PowerCoefficients(const Backend &backend, std::size_t power) :
keys(backend.size()*power)
{
for(std::size_t i = 0; i < backend.size(); ++i) {
const LocalKey &k = backend.localKey(i);
for(std::size_t d = 0; d < power; ++d)
keys[i+d*backend.size()] =
LocalKey(k.subEntity(), k.codim(), power*k.index() + d);
}
}
//! number of coefficients
inline std::size_t size() const { return keys.size(); }
//! get i'th index
inline const LocalKey& localKey(std::size_t i) const { return keys[i]; }
};
} // namespace Dune
#endif // DUNE_LOCALFUNCTIONS_META_POWER_COEFFICIENTS_HH
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