diff options
author | Benoit Jacob <jacob.benoit.1@gmail.com> | 2010-04-16 14:46:55 -0400 |
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committer | Benoit Jacob <jacob.benoit.1@gmail.com> | 2010-04-16 14:46:55 -0400 |
commit | 797f63044a0ded4c2b9139cda067bc10afbf72e6 (patch) | |
tree | 2dd33ebd3c8dc593e61a50987f3112f0c9486eae /Eigen | |
parent | d9ee28851ec17225893161ab21a3f3172043532a (diff) |
oops, forgot to add DenseDirectAccessBase
Diffstat (limited to 'Eigen')
-rw-r--r-- | Eigen/src/Core/DenseDirectAccessBase.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/Eigen/src/Core/DenseDirectAccessBase.h b/Eigen/src/Core/DenseDirectAccessBase.h new file mode 100644 index 000000000..a62debcc6 --- /dev/null +++ b/Eigen/src/Core/DenseDirectAccessBase.h @@ -0,0 +1,138 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. +// +// Copyright (C) 2010 Benoit Jacob <jacob.benoit.1@gmail.com> +// +// Eigen 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 3 of the License, or (at your option) any later version. +// +// Alternatively, you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of +// the License, or (at your option) any later version. +// +// Eigen 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 or the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License and a copy of the GNU General Public License along with +// Eigen. If not, see <http://www.gnu.org/licenses/>. + +#ifndef EIGEN_DENSEDIRECTACCESSBASE_H +#define EIGEN_DENSEDIRECTACCESSBASE_H + +template<typename Derived> struct ei_has_direct_access +{ + enum { ret = (ei_traits<Derived>::Flags & DirectAccessBit) ? 1 : 0 }; +}; + +template<typename Derived, bool _HasDirectAccess = ei_has_direct_access<Derived>::ret> +struct ei_inner_stride_at_compile_time +{ + enum { ret = ei_traits<Derived>::InnerStrideAtCompileTime }; +}; + +template<typename Derived> +struct ei_inner_stride_at_compile_time<Derived, false> +{ + enum { ret = 0 }; +}; + +template<typename Derived, bool _HasDirectAccess = ei_has_direct_access<Derived>::ret> +struct ei_outer_stride_at_compile_time +{ + enum { ret = ei_traits<Derived>::OuterStrideAtCompileTime }; +}; + +template<typename Derived> +struct ei_outer_stride_at_compile_time<Derived, false> +{ + enum { ret = 0 }; +}; + +template<typename Derived, typename XprKind = typename ei_traits<Derived>::XprKind> +struct ei_dense_xpr_base +{ + /* ei_dense_xpr_base should only ever be used on dense expressions, thus falling either into the MatrixXpr or into the ArrayXpr cases */ +}; + +template<typename Derived> +struct ei_dense_xpr_base<Derived, MatrixXpr> +{ + typedef MatrixBase<Derived> type; +}; + +template<typename Derived> +struct ei_dense_xpr_base<Derived, ArrayXpr> +{ + typedef ArrayBase<Derived> type; +}; + +template<typename Derived> class DenseDirectAccessBase + : public ei_dense_xpr_base<Derived>::type +{ + public: + + typedef typename ei_dense_xpr_base<Derived>::type Base; + + using Base::IsVectorAtCompileTime; + using Base::IsRowMajor; + using Base::derived; + using Base::operator=; + + typedef typename Base::CoeffReturnType CoeffReturnType; + + enum { + InnerStrideAtCompileTime = ei_traits<Derived>::InnerStrideAtCompileTime, + OuterStrideAtCompileTime = ei_traits<Derived>::OuterStrideAtCompileTime + }; + + /** \returns the pointer increment between two consecutive elements within a slice in the inner direction. + * + * \sa outerStride(), rowStride(), colStride() + */ + inline int innerStride() const + { + return derived().innerStride(); + } + + /** \returns the pointer increment between two consecutive inner slices (for example, between two consecutive columns + * in a column-major matrix). + * + * \sa innerStride(), rowStride(), colStride() + */ + inline int outerStride() const + { + return derived().outerStride(); + } + + inline int stride() const + { + return IsVectorAtCompileTime ? innerStride() : outerStride(); + } + + /** \returns the pointer increment between two consecutive rows. + * + * \sa innerStride(), outerStride(), colStride() + */ + inline int rowStride() const + { + return IsRowMajor ? outerStride() : innerStride(); + } + + /** \returns the pointer increment between two consecutive columns. + * + * \sa innerStride(), outerStride(), rowStride() + */ + inline int colStride() const + { + return IsRowMajor ? innerStride() : outerStride(); + } + +}; + +#endif // EIGEN_DENSEDIRECTACCESSBASE_H |