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4af1753b6f
because thanks to the previous commit this is not needed anymore * add a more general ForceAlignedAccess expression which can be used for any expression. It is already used by StableNorm.h.
107 lines
3.6 KiB
C++
107 lines
3.6 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) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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// Copyright (C) 2008 Gael Guennebaud <g.gael@free.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_MAP_H
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#define EIGEN_MAP_H
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/** \class Map
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*
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* \brief A matrix or vector expression mapping an existing array of data.
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*
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* \param MatrixType the equivalent matrix type of the mapped data
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* \param Options specifies whether the pointer is \c Aligned, or \c Unaligned.
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* The default is \c Unaligned.
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*
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* This class represents a matrix or vector expression mapping an existing array of data.
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* It can be used to let Eigen interface without any overhead with non-Eigen data structures,
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* such as plain C arrays or structures from other libraries.
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*
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* \b Tip: to change the array of data mapped by a Map object, you can use the C++
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* placement new syntax:
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*
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* Example: \include Map_placement_new.cpp
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* Output: \verbinclude Map_placement_new.out
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*
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* This class is the return type of Matrix::Map() but can also be used directly.
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*
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* \sa Matrix::Map()
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*/
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template<typename MatrixType, int Options>
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struct ei_traits<Map<MatrixType, Options> > : public ei_traits<MatrixType>
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{
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enum {
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Flags = (Options&Aligned)==Aligned ? ei_traits<MatrixType>::Flags | AlignedBit
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: ei_traits<MatrixType>::Flags & ~AlignedBit
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};
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};
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template<typename MatrixType, int Options> class Map
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: public MapBase<Map<MatrixType, Options> >
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{
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public:
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_EIGEN_GENERIC_PUBLIC_INTERFACE(Map, MapBase<Map>)
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inline int stride() const { return this->innerSize(); }
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inline Map(const Scalar* data) : Base(data) {}
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inline Map(const Scalar* data, int size) : Base(data, size) {}
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inline Map(const Scalar* data, int rows, int cols) : Base(data, rows, cols) {}
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inline void resize(int rows, int cols)
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{
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EIGEN_ONLY_USED_FOR_DEBUG(rows);
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EIGEN_ONLY_USED_FOR_DEBUG(cols);
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ei_assert(rows == this->rows());
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ei_assert(cols == this->cols());
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}
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inline void resize(int size)
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{
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EIGEN_STATIC_ASSERT_VECTOR_ONLY(MatrixType)
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EIGEN_ONLY_USED_FOR_DEBUG(size);
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ei_assert(size == this->size());
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}
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EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Map)
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};
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/** Constructor copying an existing array of data.
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* Only for fixed-size matrices and vectors.
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* \param data The array of data to copy
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*
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* \sa Matrix::Map(const Scalar *)
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*/
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template<typename _Scalar, int _Rows, int _Cols, int _StorageOrder, int _MaxRows, int _MaxCols>
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inline Matrix<_Scalar, _Rows, _Cols, _StorageOrder, _MaxRows, _MaxCols>
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::Matrix(const Scalar *data)
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{
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_set_noalias(Eigen::Map<Matrix>(data));
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}
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#endif // EIGEN_MAP_H
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