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127 lines
4.5 KiB
C++
127 lines
4.5 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2010 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#ifndef EIGEN_SPARSE_SOLVE_H
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#define EIGEN_SPARSE_SOLVE_H
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namespace Eigen {
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namespace internal {
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template<typename _DecompositionType, typename Rhs> struct sparse_solve_retval_base;
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template<typename _DecompositionType, typename Rhs> struct sparse_solve_retval;
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template<typename DecompositionType, typename Rhs>
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struct traits<sparse_solve_retval_base<DecompositionType, Rhs> >
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{
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typedef typename DecompositionType::MatrixType MatrixType;
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typedef SparseMatrix<typename Rhs::Scalar, Rhs::Options, typename Rhs::Index> ReturnType;
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};
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template<typename _DecompositionType, typename Rhs> struct sparse_solve_retval_base
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: public ReturnByValue<sparse_solve_retval_base<_DecompositionType, Rhs> >
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{
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typedef typename remove_all<typename Rhs::Nested>::type RhsNestedCleaned;
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typedef _DecompositionType DecompositionType;
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typedef ReturnByValue<sparse_solve_retval_base> Base;
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typedef typename Base::Index Index;
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sparse_solve_retval_base(const DecompositionType& dec, const Rhs& rhs)
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: m_dec(dec), m_rhs(rhs)
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{}
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inline Index rows() const { return m_dec.cols(); }
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inline Index cols() const { return m_rhs.cols(); }
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inline const DecompositionType& dec() const { return m_dec; }
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inline const RhsNestedCleaned& rhs() const { return m_rhs; }
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template<typename Dest> inline void evalTo(Dest& dst) const
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{
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static_cast<const sparse_solve_retval<DecompositionType,Rhs>*>(this)->evalTo(dst);
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}
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protected:
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const DecompositionType& m_dec;
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typename Rhs::Nested m_rhs;
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};
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#define EIGEN_MAKE_SPARSE_SOLVE_HELPERS(DecompositionType,Rhs) \
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typedef typename DecompositionType::MatrixType MatrixType; \
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typedef typename MatrixType::Scalar Scalar; \
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typedef typename MatrixType::RealScalar RealScalar; \
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typedef typename MatrixType::Index Index; \
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typedef Eigen::internal::sparse_solve_retval_base<DecompositionType,Rhs> Base; \
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using Base::dec; \
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using Base::rhs; \
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using Base::rows; \
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using Base::cols; \
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sparse_solve_retval(const DecompositionType& dec, const Rhs& rhs) \
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: Base(dec, rhs) {}
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template<typename DecompositionType, typename Rhs, typename Guess> struct solve_retval_with_guess;
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template<typename DecompositionType, typename Rhs, typename Guess>
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struct traits<solve_retval_with_guess<DecompositionType, Rhs, Guess> >
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{
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typedef typename DecompositionType::MatrixType MatrixType;
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typedef Matrix<typename Rhs::Scalar,
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MatrixType::ColsAtCompileTime,
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Rhs::ColsAtCompileTime,
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Rhs::PlainObject::Options,
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MatrixType::MaxColsAtCompileTime,
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Rhs::MaxColsAtCompileTime> ReturnType;
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};
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template<typename DecompositionType, typename Rhs, typename Guess> struct solve_retval_with_guess
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: public ReturnByValue<solve_retval_with_guess<DecompositionType, Rhs, Guess> >
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{
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typedef typename DecompositionType::Index Index;
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solve_retval_with_guess(const DecompositionType& dec, const Rhs& rhs, const Guess& guess)
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: m_dec(dec), m_rhs(rhs), m_guess(guess)
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{}
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inline Index rows() const { return m_dec.cols(); }
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inline Index cols() const { return m_rhs.cols(); }
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template<typename Dest> inline void evalTo(Dest& dst) const
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{
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dst = m_guess;
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m_dec._solveWithGuess(m_rhs,dst);
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}
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protected:
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const DecompositionType& m_dec;
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const typename Rhs::Nested m_rhs;
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const typename Guess::Nested m_guess;
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};
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} // namepsace internal
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} // end namespace Eigen
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#endif // EIGEN_SPARSE_SOLVE_H
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