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Diffstat (limited to 'extern/Eigen3/Eigen/src/SparseCore/SparseTriangularView.h')
| -rw-r--r-- | extern/Eigen3/Eigen/src/SparseCore/SparseTriangularView.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/extern/Eigen3/Eigen/src/SparseCore/SparseTriangularView.h b/extern/Eigen3/Eigen/src/SparseCore/SparseTriangularView.h new file mode 100644 index 00000000000..477e4bd94b0 --- /dev/null +++ b/extern/Eigen3/Eigen/src/SparseCore/SparseTriangularView.h @@ -0,0 +1,164 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr> +// +// This Source Code Form is subject to the terms of the Mozilla +// Public License v. 2.0. If a copy of the MPL was not distributed +// with this file, You can obtain one at http://mozilla.org/MPL/2.0/. + +#ifndef EIGEN_SPARSE_TRIANGULARVIEW_H +#define EIGEN_SPARSE_TRIANGULARVIEW_H + +namespace Eigen { + +namespace internal { + +template<typename MatrixType, int Mode> +struct traits<SparseTriangularView<MatrixType,Mode> > +: public traits<MatrixType> +{}; + +} // namespace internal + +template<typename MatrixType, int Mode> class SparseTriangularView + : public SparseMatrixBase<SparseTriangularView<MatrixType,Mode> > +{ + enum { SkipFirst = ((Mode&Lower) && !(MatrixType::Flags&RowMajorBit)) + || ((Mode&Upper) && (MatrixType::Flags&RowMajorBit)), + SkipLast = !SkipFirst, + HasUnitDiag = (Mode&UnitDiag) ? 1 : 0 + }; + + public: + + EIGEN_SPARSE_PUBLIC_INTERFACE(SparseTriangularView) + + class InnerIterator; + class ReverseInnerIterator; + + inline Index rows() const { return m_matrix.rows(); } + inline Index cols() const { return m_matrix.cols(); } + + typedef typename MatrixType::Nested MatrixTypeNested; + typedef typename internal::remove_reference<MatrixTypeNested>::type MatrixTypeNestedNonRef; + typedef typename internal::remove_all<MatrixTypeNested>::type MatrixTypeNestedCleaned; + + inline SparseTriangularView(const MatrixType& matrix) : m_matrix(matrix) {} + + /** \internal */ + inline const MatrixTypeNestedCleaned& nestedExpression() const { return m_matrix; } + + template<typename OtherDerived> + typename internal::plain_matrix_type_column_major<OtherDerived>::type + solve(const MatrixBase<OtherDerived>& other) const; + + template<typename OtherDerived> void solveInPlace(MatrixBase<OtherDerived>& other) const; + template<typename OtherDerived> void solveInPlace(SparseMatrixBase<OtherDerived>& other) const; + + protected: + MatrixTypeNested m_matrix; +}; + +template<typename MatrixType, int Mode> +class SparseTriangularView<MatrixType,Mode>::InnerIterator : public MatrixTypeNestedCleaned::InnerIterator +{ + typedef typename MatrixTypeNestedCleaned::InnerIterator Base; + public: + + EIGEN_STRONG_INLINE InnerIterator(const SparseTriangularView& view, Index outer) + : Base(view.nestedExpression(), outer), m_returnOne(false) + { + if(SkipFirst) + { + while((*this) && (HasUnitDiag ? this->index()<=outer : this->index()<outer)) + Base::operator++(); + if(HasUnitDiag) + m_returnOne = true; + } + else if(HasUnitDiag && ((!Base::operator bool()) || Base::index()>=Base::outer())) + { + if((!SkipFirst) && Base::operator bool()) + Base::operator++(); + m_returnOne = true; + } + } + + EIGEN_STRONG_INLINE InnerIterator& operator++() + { + if(HasUnitDiag && m_returnOne) + m_returnOne = false; + else + { + Base::operator++(); + if(HasUnitDiag && (!SkipFirst) && ((!Base::operator bool()) || Base::index()>=Base::outer())) + { + if((!SkipFirst) && Base::operator bool()) + Base::operator++(); + m_returnOne = true; + } + } + return *this; + } + + inline Index row() const { return Base::row(); } + inline Index col() const { return Base::col(); } + inline Index index() const + { + if(HasUnitDiag && m_returnOne) return Base::outer(); + else return Base::index(); + } + inline Scalar value() const + { + if(HasUnitDiag && m_returnOne) return Scalar(1); + else return Base::value(); + } + + EIGEN_STRONG_INLINE operator bool() const + { + if(HasUnitDiag && m_returnOne) + return true; + return (SkipFirst ? Base::operator bool() : (Base::operator bool() && this->index() <= this->outer())); + } + protected: + bool m_returnOne; +}; + +template<typename MatrixType, int Mode> +class SparseTriangularView<MatrixType,Mode>::ReverseInnerIterator : public MatrixTypeNestedCleaned::ReverseInnerIterator +{ + typedef typename MatrixTypeNestedCleaned::ReverseInnerIterator Base; + public: + + EIGEN_STRONG_INLINE ReverseInnerIterator(const SparseTriangularView& view, Index outer) + : Base(view.nestedExpression(), outer) + { + eigen_assert((!HasUnitDiag) && "ReverseInnerIterator does not support yet triangular views with a unit diagonal"); + if(SkipLast) + while((*this) && this->index()>outer) + --(*this); + } + + EIGEN_STRONG_INLINE InnerIterator& operator--() + { Base::operator--(); return *this; } + + inline Index row() const { return Base::row(); } + inline Index col() const { return Base::col(); } + + EIGEN_STRONG_INLINE operator bool() const + { + return SkipLast ? Base::operator bool() : (Base::operator bool() && this->index() >= this->outer()); + } +}; + +template<typename Derived> +template<int Mode> +inline const SparseTriangularView<Derived, Mode> +SparseMatrixBase<Derived>::triangularView() const +{ + return derived(); +} + +} // end namespace Eigen + +#endif // EIGEN_SPARSE_TRIANGULARVIEW_H |