/usr/include/trilinos/Stokhos_MeanBasedDivisionExpansionStrategy.hpp is in libtrilinos-stokhos-dev 12.4.2-2.
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#ifndef STOKHOS_MEAN_BASED_DIVISION_EXPANSION_STRATEGY_HPP
#define STOKHOS_MEAN_BASED_DIVISION_EXPANSION_STRATEGY_HPP
#include "Stokhos_DivisionExpansionStrategy.hpp"
#include "Teuchos_TimeMonitor.hpp"
namespace Stokhos {
//! Strategy interface for computing PCE of a/b using only b[0]
/*!
* Such a strategy is only useful when the division occurs in a preconditioner
*/
template <typename ordinal_type, typename value_type, typename node_type>
class MeanBasedDivisionExpansionStrategy :
public DivisionExpansionStrategy<ordinal_type,value_type,node_type> {
public:
//! Constructor
MeanBasedDivisionExpansionStrategy() {}
//! Destructor
virtual ~MeanBasedDivisionExpansionStrategy() {}
// Division operation: c = \alpha*(a/b) + beta*c
virtual void divide(
Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& c,
const value_type& alpha,
const Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& a,
const Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& b,
const value_type& beta);
private:
// Prohibit copying
MeanBasedDivisionExpansionStrategy(
const MeanBasedDivisionExpansionStrategy&);
// Prohibit Assignment
MeanBasedDivisionExpansionStrategy& operator=(
const MeanBasedDivisionExpansionStrategy& b);
}; // class DivisionExpansionStrategy
} // namespace Stokhos
template <typename ordinal_type, typename value_type, typename node_type>
void
Stokhos::MeanBasedDivisionExpansionStrategy<ordinal_type,value_type,node_type>::
divide(Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& c,
const value_type& alpha,
const Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& a,
const Stokhos::OrthogPolyApprox<ordinal_type, value_type, node_type>& b,
const value_type& beta)
{
#ifdef STOKHOS_TEUCHOS_TIME_MONITOR
TEUCHOS_FUNC_TIME_MONITOR("Stokhos::MeanBasedDivisionStrategy::divide()");
#endif
ordinal_type pc = a.size();
if (c.size() != pc)
c.resize(pc);
const value_type* ca = a.coeff();
const value_type* cb = b.coeff();
value_type* cc = c.coeff();
for (ordinal_type i=0; i<pc; i++)
cc[i] = alpha*ca[i]/cb[0] + beta*cc[i];
}
#endif // STOKHOS_MEAN_BASED_DIVISION_EXPANSION_STRATEGY_HPP
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