/usr/include/trilinos/Teuchos_Polynomial.hpp is in libtrilinos-dev 10.4.0.dfsg-1ubuntu2.
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// ***********************************************************************
//
// Teuchos: Common Tools Package
// Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
#ifndef TEUCHOS_POLYNOMIAL_HPP
#define TEUCHOS_POLYNOMIAL_HPP
#include "Teuchos_PolynomialDecl.hpp"
#include "Teuchos_ScalarTraits.hpp"
template <typename CoeffT>
Teuchos::Polynomial<CoeffT>::Polynomial(unsigned int deg,
const CoeffT& cloneCoeff,
unsigned int reserve) :
d(deg)
{
if (reserve > d)
sz = reserve+1;
else
sz = d+1;
coeff.resize(sz);
for (unsigned int i=0; i<sz; i++)
coeff[i] = PolynomialTraits<CoeffT>::clone(cloneCoeff);
}
template <typename CoeffT>
Teuchos::Polynomial<CoeffT>::Polynomial(unsigned int deg,
unsigned int reserve) :
d(deg)
{
if (reserve > d)
sz = reserve+1;
else
sz = d+1;
coeff.resize(sz);
}
template <typename CoeffT>
Teuchos::Polynomial<CoeffT>::~Polynomial()
{
}
template <typename CoeffT>
void
Teuchos::Polynomial<CoeffT>::setDegree(unsigned int deg)
{
d = deg;
if (d+1 > sz) {
coeff.resize(d+1);
if (coeff[0] != Teuchos::null) {
for (unsigned int i=sz; i<d+1; i++)
coeff[i] = PolynomialTraits<CoeffT>::clone(*coeff[0]);
}
sz = d+1;
}
}
template <typename CoeffT>
Teuchos::RCP<CoeffT>
Teuchos::Polynomial<CoeffT>::getCoefficient(unsigned int i)
{
#ifdef TEUCHOS_DEBUG
TEST_FOR_EXCEPTION(i > d,
std::out_of_range,
"Polynomial<CoeffT>::getCoefficient(i): " <<
"Error, coefficient i = " << i <<
" is not in range, degree = " << d << "." );
#endif
return coeff[i];
}
template <typename CoeffT>
Teuchos::RCP<const CoeffT>
Teuchos::Polynomial<CoeffT>::getCoefficient(unsigned int i) const
{
#ifdef TEUCHOS_DEBUG
TEST_FOR_EXCEPTION(i > d,
std::out_of_range,
"Polynomial<CoeffT>::getCoefficient(i): " <<
"Error, coefficient i = " << i <<
" is not in range, degree = " << d << "." );
#endif
return coeff[i];
}
template <typename CoeffT>
void
Teuchos::Polynomial<CoeffT>::setCoefficient(unsigned int i, const CoeffT& v)
{
#ifdef TEUCHOS_DEBUG
TEST_FOR_EXCEPTION(i > d,
std::out_of_range,
"Polynomial<CoeffT>::setCoefficient(i,v): " <<
"Error, coefficient i = " << i <<
" is not in range, degree = " << d << "." );
TEST_FOR_EXCEPTION(coeff[i] == Teuchos::null,
std::runtime_error,
"Polynomial<CoeffT>::setCoefficient(i,v): " <<
"Error, coefficient i = " << i << " is null!");
#endif
PolynomialTraits<CoeffT>::copy(v, coeff[i].get());
}
template <typename CoeffT>
void
Teuchos::Polynomial<CoeffT>::setCoefficientPtr(
unsigned int i,
const Teuchos::RCP<CoeffT>& v)
{
#ifdef TEUCHOS_DEBUG
TEST_FOR_EXCEPTION(i > d,
std::out_of_range,
"Polynomial<CoeffT>::setCoefficientPtr(i,v): " <<
"Error, coefficient i = " << i <<
" is not in range, degree = " << d << "." );
#endif
coeff[i] = v;
}
template <typename CoeffT>
void
Teuchos::Polynomial<CoeffT>::evaluate(
typename Teuchos::Polynomial<CoeffT>::scalar_type t,
CoeffT* x, CoeffT* xdot) const
{
bool evaluate_xdot = (xdot != NULL);
#ifdef TEUCHOS_DEBUG
for (unsigned int i=0; i<=d; i++)
TEST_FOR_EXCEPTION(coeff[i] == Teuchos::null,
std::runtime_error,
"Polynomial<CoeffT>::evaluate(): " <<
"Error, coefficient i = " << i << " is null!");
#endif
// Initialize x, xdot with coeff[d]
PolynomialTraits<CoeffT>::copy(*coeff[d], x);
if (evaluate_xdot) {
if (d > 0)
PolynomialTraits<CoeffT>::copy(*coeff[d], xdot);
else
PolynomialTraits<CoeffT>::assign(
xdot,
Teuchos::ScalarTraits<scalar_type>::zero());
}
// If this is a degree 0 polynomial, we're done
if (d == 0)
return;
for (int k=d-1; k>=0; --k) {
// compute x = coeff[k] + t*x
PolynomialTraits<CoeffT>::update(x, *coeff[k], t);
// compute xdot = x + t*xdot
if (evaluate_xdot && k > 0)
PolynomialTraits<CoeffT>::update(xdot, *x, t);
}
}
#endif // TEUCHOS_VECTOR_POLYNOMIAL_HPP
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