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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2009-2010 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_ARRAYWRAPPER_H
+#define EIGEN_ARRAYWRAPPER_H
+
+namespace Eigen {
+
+/** \class ArrayWrapper
+ * \ingroup Core_Module
+ *
+ * \brief Expression of a mathematical vector or matrix as an array object
+ *
+ * This class is the return type of MatrixBase::array(), and most of the time
+ * this is the only way it is use.
+ *
+ * \sa MatrixBase::array(), class MatrixWrapper
+ */
+
+namespace internal {
+template<typename ExpressionType>
+struct traits<ArrayWrapper<ExpressionType> >
+ : public traits<typename remove_all<typename ExpressionType::Nested>::type >
+{
+ typedef ArrayXpr XprKind;
+};
+}
+
+template<typename ExpressionType>
+class ArrayWrapper : public ArrayBase<ArrayWrapper<ExpressionType> >
+{
+ public:
+ typedef ArrayBase<ArrayWrapper> Base;
+ EIGEN_DENSE_PUBLIC_INTERFACE(ArrayWrapper)
+ EIGEN_INHERIT_ASSIGNMENT_OPERATORS(ArrayWrapper)
+
+ typedef typename internal::conditional<
+ internal::is_lvalue<ExpressionType>::value,
+ Scalar,
+ const Scalar
+ >::type ScalarWithConstIfNotLvalue;
+
+ typedef typename internal::nested<ExpressionType>::type NestedExpressionType;
+
+ inline ArrayWrapper(ExpressionType& matrix) : m_expression(matrix) {}
+
+ inline Index rows() const { return m_expression.rows(); }
+ inline Index cols() const { return m_expression.cols(); }
+ inline Index outerStride() const { return m_expression.outerStride(); }
+ inline Index innerStride() const { return m_expression.innerStride(); }
+
+ inline ScalarWithConstIfNotLvalue* data() { return m_expression.const_cast_derived().data(); }
+ inline const Scalar* data() const { return m_expression.data(); }
+
+ inline CoeffReturnType coeff(Index rowId, Index colId) const
+ {
+ return m_expression.coeff(rowId, colId);
+ }
+
+ inline Scalar& coeffRef(Index rowId, Index colId)
+ {
+ return m_expression.const_cast_derived().coeffRef(rowId, colId);
+ }
+
+ inline const Scalar& coeffRef(Index rowId, Index colId) const
+ {
+ return m_expression.const_cast_derived().coeffRef(rowId, colId);
+ }
+
+ inline CoeffReturnType coeff(Index index) const
+ {
+ return m_expression.coeff(index);
+ }
+
+ inline Scalar& coeffRef(Index index)
+ {
+ return m_expression.const_cast_derived().coeffRef(index);
+ }
+
+ inline const Scalar& coeffRef(Index index) const
+ {
+ return m_expression.const_cast_derived().coeffRef(index);
+ }
+
+ template<int LoadMode>
+ inline const PacketScalar packet(Index rowId, Index colId) const
+ {
+ return m_expression.template packet<LoadMode>(rowId, colId);
+ }
+
+ template<int LoadMode>
+ inline void writePacket(Index rowId, Index colId, const PacketScalar& val)
+ {
+ m_expression.const_cast_derived().template writePacket<LoadMode>(rowId, colId, val);
+ }
+
+ template<int LoadMode>
+ inline const PacketScalar packet(Index index) const
+ {
+ return m_expression.template packet<LoadMode>(index);
+ }
+
+ template<int LoadMode>
+ inline void writePacket(Index index, const PacketScalar& val)
+ {
+ m_expression.const_cast_derived().template writePacket<LoadMode>(index, val);
+ }
+
+ template<typename Dest>
+ inline void evalTo(Dest& dst) const { dst = m_expression; }
+
+ const typename internal::remove_all<NestedExpressionType>::type&
+ nestedExpression() const
+ {
+ return m_expression;
+ }
+
+ /** Forwards the resizing request to the nested expression
+ * \sa DenseBase::resize(Index) */
+ void resize(Index newSize) { m_expression.const_cast_derived().resize(newSize); }
+ /** Forwards the resizing request to the nested expression
+ * \sa DenseBase::resize(Index,Index)*/
+ void resize(Index nbRows, Index nbCols) { m_expression.const_cast_derived().resize(nbRows,nbCols); }
+
+ protected:
+ NestedExpressionType m_expression;
+};
+
+/** \class MatrixWrapper
+ * \ingroup Core_Module
+ *
+ * \brief Expression of an array as a mathematical vector or matrix
+ *
+ * This class is the return type of ArrayBase::matrix(), and most of the time
+ * this is the only way it is use.
+ *
+ * \sa MatrixBase::matrix(), class ArrayWrapper
+ */
+
+namespace internal {
+template<typename ExpressionType>
+struct traits<MatrixWrapper<ExpressionType> >
+ : public traits<typename remove_all<typename ExpressionType::Nested>::type >
+{
+ typedef MatrixXpr XprKind;
+};
+}
+
+template<typename ExpressionType>
+class MatrixWrapper : public MatrixBase<MatrixWrapper<ExpressionType> >
+{
+ public:
+ typedef MatrixBase<MatrixWrapper<ExpressionType> > Base;
+ EIGEN_DENSE_PUBLIC_INTERFACE(MatrixWrapper)
+ EIGEN_INHERIT_ASSIGNMENT_OPERATORS(MatrixWrapper)
+
+ typedef typename internal::conditional<
+ internal::is_lvalue<ExpressionType>::value,
+ Scalar,
+ const Scalar
+ >::type ScalarWithConstIfNotLvalue;
+
+ typedef typename internal::nested<ExpressionType>::type NestedExpressionType;
+
+ inline MatrixWrapper(ExpressionType& a_matrix) : m_expression(a_matrix) {}
+
+ inline Index rows() const { return m_expression.rows(); }
+ inline Index cols() const { return m_expression.cols(); }
+ inline Index outerStride() const { return m_expression.outerStride(); }
+ inline Index innerStride() const { return m_expression.innerStride(); }
+
+ inline ScalarWithConstIfNotLvalue* data() { return m_expression.const_cast_derived().data(); }
+ inline const Scalar* data() const { return m_expression.data(); }
+
+ inline CoeffReturnType coeff(Index rowId, Index colId) const
+ {
+ return m_expression.coeff(rowId, colId);
+ }
+
+ inline Scalar& coeffRef(Index rowId, Index colId)
+ {
+ return m_expression.const_cast_derived().coeffRef(rowId, colId);
+ }
+
+ inline const Scalar& coeffRef(Index rowId, Index colId) const
+ {
+ return m_expression.derived().coeffRef(rowId, colId);
+ }
+
+ inline CoeffReturnType coeff(Index index) const
+ {
+ return m_expression.coeff(index);
+ }
+
+ inline Scalar& coeffRef(Index index)
+ {
+ return m_expression.const_cast_derived().coeffRef(index);
+ }
+
+ inline const Scalar& coeffRef(Index index) const
+ {
+ return m_expression.const_cast_derived().coeffRef(index);
+ }
+
+ template<int LoadMode>
+ inline const PacketScalar packet(Index rowId, Index colId) const
+ {
+ return m_expression.template packet<LoadMode>(rowId, colId);
+ }
+
+ template<int LoadMode>
+ inline void writePacket(Index rowId, Index colId, const PacketScalar& val)
+ {
+ m_expression.const_cast_derived().template writePacket<LoadMode>(rowId, colId, val);
+ }
+
+ template<int LoadMode>
+ inline const PacketScalar packet(Index index) const
+ {
+ return m_expression.template packet<LoadMode>(index);
+ }
+
+ template<int LoadMode>
+ inline void writePacket(Index index, const PacketScalar& val)
+ {
+ m_expression.const_cast_derived().template writePacket<LoadMode>(index, val);
+ }
+
+ const typename internal::remove_all<NestedExpressionType>::type&
+ nestedExpression() const
+ {
+ return m_expression;
+ }
+
+ /** Forwards the resizing request to the nested expression
+ * \sa DenseBase::resize(Index) */
+ void resize(Index newSize) { m_expression.const_cast_derived().resize(newSize); }
+ /** Forwards the resizing request to the nested expression
+ * \sa DenseBase::resize(Index,Index)*/
+ void resize(Index nbRows, Index nbCols) { m_expression.const_cast_derived().resize(nbRows,nbCols); }
+
+ protected:
+ NestedExpressionType m_expression;
+};
+
+} // end namespace Eigen
+
+#endif // EIGEN_ARRAYWRAPPER_H
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