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83 lines
3.2 KiB
C++
83 lines
3.2 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2007 Michael Olbrich <michael.olbrich@gmx.net>
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// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
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//
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// Eigen is free software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation; either version 2 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 General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along
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// with Eigen; if not, write to the Free Software Foundation, Inc., 51
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// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. This exception does not invalidate any other reasons why a work
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// based on this file might be covered by the GNU General Public License.
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#ifndef EIGEN_OPERATOREQUALS_H
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#define EIGEN_OPERATOREQUALS_H
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template<typename Derived1, typename Derived2, int UnrollCount, int Rows>
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struct OperatorEqualsUnroller
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{
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static const int col = (UnrollCount-1) / Rows;
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static const int row = (UnrollCount-1) % Rows;
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static void run(Derived1 &dst, const Derived2 &src)
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{
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OperatorEqualsUnroller<Derived1, Derived2, UnrollCount-1, Rows>::run(dst, src);
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dst.coeffRef(row, col) = src.coeff(row, col);
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}
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};
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// prevent buggy user code from causing an infinite recursion
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template<typename Derived1, typename Derived2, int UnrollCount>
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struct OperatorEqualsUnroller<Derived1, Derived2, UnrollCount, 0>
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{
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static void run(Derived1 &, const Derived2 &) {}
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};
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template<typename Derived1, typename Derived2, int Rows>
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struct OperatorEqualsUnroller<Derived1, Derived2, 1, Rows>
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{
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static void run(Derived1 &dst, const Derived2 &src)
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{
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dst.coeffRef(0, 0) = src.coeff(0, 0);
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}
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};
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template<typename Derived1, typename Derived2, int Rows>
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struct OperatorEqualsUnroller<Derived1, Derived2, Dynamic, Rows>
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{
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static void run(Derived1 &, const Derived2 &) {}
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};
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template<typename Scalar, typename Derived>
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template<typename OtherDerived>
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Derived& MatrixBase<Scalar, Derived>
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::operator=(const MatrixBase<Scalar, OtherDerived>& other)
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{
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assert(rows() == other.rows() && cols() == other.cols());
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if(EIGEN_UNROLLED_LOOPS && SizeAtCompileTime != Dynamic && SizeAtCompileTime <= 25)
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OperatorEqualsUnroller
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<Derived, OtherDerived, SizeAtCompileTime, RowsAtCompileTime>::run
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(*static_cast<Derived*>(this), *static_cast<const OtherDerived*>(&other));
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else
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for(int j = 0; j < cols(); j++) //traverse in column-dominant order
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for(int i = 0; i < rows(); i++)
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coeffRef(i, j) = other.coeff(i, j);
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return *static_cast<Derived*>(this);
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}
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#endif // EIGEN_OPERATOREQUALS_H
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