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Matrix.h

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//
//      Copyright (C) 2002 Robert Renaud
//
//      This program is free software; 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.
//
//      This program 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 General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program; if not, write to the Free Software
//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//

#ifndef MATRIX_H_
#define MATRIX_H_

#include "../Config.h"
#include <fstream> // for std::istream

namespace Util {

        // TODO: implement a Matrix iterator so Util::freeDynamicContainer works on Matrix<stuff*>
        template <class element> class Matrix {
        public:
                Matrix(int rows, int cols);

                Matrix(int rows, int cols, const element& defElement);

                ~Matrix();

                element& operator()(int row, int col)                           { return elemList[numCols()*row + col]; }
                const element& operator()(int row, int col) const       { return elemList[numCols()*row + col]; }

                int numRows() const { return rows; }

                int numCols() const { return cols; }
        protected:
                int rows;
                int cols;
                element* elemList;
        private:
                Matrix(const Matrix& COPY_CTOR_NOT_IMPLEMTED);
                void operator = (const Matrix& ASSIGNMENT_NOT_YET_IMPLEMTED);
        };

        template <class T>      void operator >> (std::istream& instream, Matrix<T>& mat);
        
        template <class element>
    Matrix<element>::Matrix(int numRows, int numCols, const element& defElement){
                if (numRows < 0) numRows = 0;
                if (numCols < 0) numCols = 0;

                rows = numRows;
                cols = numCols;
                
                elemList = new element[rows*cols];

                for (int i = 0; i < rows; i++) {
                        for (int j = 0; j < cols; j++) {
                                this->operator()(i,j) = defElement;
                        }
                }
        }

        template <class element> Matrix<element>::Matrix(int rows, int cols) : 
        Matrix<element>(rows, cols, element())
        { }

        template <class element> Matrix<element>::~Matrix() {
                delete[] elemList;
        }

        template <class T>      void operator >> (std::istream& instream, Matrix<T>& mat) {
                for (int j = 0; j < mat.numRows(); j++) {
                        for (int i = 0; i < mat.numCols(); i++) {
                                instream >> mat(i,j);
                        }
                }
        }

};

#endif // ifdef MATRIX_H_

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