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/*
* Copyright (c) 2007-2012, Michael Lehn * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1) Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2) Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3) Neither the name of the FLENS development group nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef FLENS_STORAGE_COORDSTORAGE_COORDSTORAGE_H #define FLENS_STORAGE_COORDSTORAGE_COORDSTORAGE_H 1 #include <cxxstd/algorithm.h> #include <cxxstd/cstddef.h> #include <cxxstd/vector.h> #include <flens/storage/indexoptions.h> namespace flens { // forward declarations template <typename T, typename IndexType> struct Coord; template <typename T> struct CoordProxy; struct CoordRowColCmp; template <typename T, typename Cmp = CoordRowColCmp, typename I = IndexOptions<> > class CoordStorage { public: typedef T ElementType; typedef typename I::IndexType IndexType; typedef CoordProxy<T> ElementProxy; typedef Coord<T, IndexType> CoordType; typedef std::vector<CoordType> CoordVector; static const IndexType defaultIndexBase = I::defaultIndexBase; CoordStorage(IndexType numRows, IndexType numCols, IndexType densityEstimate = 1, IndexType indexBase = I::defaultIndexBase); ~CoordStorage(); //-- operators --------------------------------------------------------- ElementProxy operator()(IndexType row, IndexType col); //-- methods ----------------------------------------------------------- const IndexType indexBase() const; const IndexType firstRow() const; const IndexType lastRow() const; const IndexType firstCol() const; const IndexType lastCol() const; const IndexType numRows() const; const IndexType numCols() const; void accumulate() const; const CoordVector & coordVector() const; const IndexType numNonZeros() const; //private: // Lehn: I do not allow copying matrices with coordiante storage unless // someone gives me a reason. CoordStorage(const CoordStorage &rhs); IndexType numRows_, numCols_; IndexType indexBase_; mutable CoordVector coord_; mutable size_t lastSortedCoord_; mutable bool isSorted_; mutable bool isAccumulated_; Cmp less_; }; //-- Coord --------------------------------------------------------------------- template <typename T, typename IndexType> struct Coord { Coord(IndexType row, IndexType col, const T &value); IndexType row, col; T value; }; //-- CoordProxy ---------------------------------------------------------------- template <typename T> struct CoordProxy { CoordProxy(T *value); void operator+=(const T &x); void operator-=(const T &x); private: T *value; // // We only allow accumulation of data. Assignment would be too expensive. // void operator=(const T &x); }; //-- CoordRowColCmp ------------------------------------------------------------ // // This ordering gets used for converting the coordinate storage format to // the compressed row storage format // struct CoordRowColCmp { // return true if a < b // <=> a.row<b.row or a.row==b.row and a.col<b.col template <typename T, typename IndexType> bool operator()(const Coord<T, IndexType> &a, const Coord<T, IndexType> &b) const; }; //-- CoordColRowCmp ------------------------------------------------------------ // // This ordering gets used for converting the coordinate storage format to // the compressed row storage format // struct CoordColRowCmp { // return true if a < b // <=> a.col<b.col or a(2)==b(2) and a.row<b.row template <typename T, typename IndexType> bool operator()(const Coord<T, IndexType> &a, const Coord<T, IndexType> &b) const; }; } // namespace flens #endif // FLENS_STORAGE_COORDSTORAGE_COORDSTORAGE_H |