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101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
/*
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Copyright 2016 SINTEF ICT, Applied Mathematics.
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPM_ASSEMBLEDCONNECTIONSITERATION_HEADER_INCLUDED
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#define OPM_ASSEMBLEDCONNECTIONSITERATION_HEADER_INCLUDED
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#include <cassert>
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namespace Opm {
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/// Holds data for a single connection.
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/// The neighbour will typically be a cell
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/// index, and the weight will typically be
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/// a flux.
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struct ConnectionData
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{
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int neighbour;
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double weight;
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};
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/// Iterator over the graph neighbourhood
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/// of a cell, typically used from AssembledConnections.
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class NeighbourhoodIterator
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{
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public:
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NeighbourhoodIterator(const int* neighbour_iter,
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const double* weight_iter)
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: neighbour_iter_(neighbour_iter),
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weight_iter_(weight_iter)
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{
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}
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ConnectionData operator*()
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{
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return { *neighbour_iter_, *weight_iter_ };
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}
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bool operator!=(const NeighbourhoodIterator& other) const
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{
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assert((neighbour_iter_ != other.neighbour_iter_) == (weight_iter_ != other.weight_iter_));
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return neighbour_iter_ != other.neighbour_iter_;
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}
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NeighbourhoodIterator& operator++()
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{
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++neighbour_iter_;
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++weight_iter_;
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return *this;
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}
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private:
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const int* neighbour_iter_;
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const double* weight_iter_;
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};
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/// A straightforward range class whose only purpose is
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/// to easily allow range-for loops over [begin_, end_).
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template <class Iterator>
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struct SimpleIteratorRange
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{
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Iterator begin() const
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{
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return begin_;
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}
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Iterator end() const
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{
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return end_;
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}
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Iterator begin_;
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Iterator end_;
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};
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} // namespace Opm
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#endif // OPM_ASSEMBLEDCONNECTIONSITERATION_HEADER_INCLUDED
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