tnt_sparse_matrix_csr.h

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/*
*
* Template Numerical Toolkit (TNT)
*
* Mathematical and Computational Sciences Division
* National Institute of Technology,
* Gaithersburg, MD USA
*
*
* This software was developed at the National Institute of Standards and
* Technology (NIST) by employees of the Federal Government in the course
* of their official duties. Pursuant to title 17 Section 105 of the
* United States Code, this software is not subject to copyright protection
* and is in the public domain. NIST assumes no responsibility whatsoever for
* its use by other parties, and makes no guarantees, expressed or implied,
* about its quality, reliability, or any other characteristic.
*
*/
 
 
#ifndef TNT_SPARSE_MATRIX_CSR_H
#define TNT_SPARSE_MATRIX_CSR_H
 
#include "tnt_array1d.h"
 
namespace TNT
{
 
 
template <class T>
class Sparse_Matrix_CompRow {
 
private:
        Array1D<T>    val_;       // data values (nz_ elements)
    Array1D<int>  rowptr_;    // row_ptr (dim_[0]+1 elements)
    Array1D<int>  colind_;    // col_ind  (nz_ elements)
 
    int dim1_;        // number of rows
    int dim2_;        // number of cols
 
public:
 
        Sparse_Matrix_CompRow(const Sparse_Matrix_CompRow &S);
        Sparse_Matrix_CompRow(int M, int N, int nz, const T *val,
                                                const int *r, const int *c);
 
 
 
    inline   const T&      val(int i) const { return val_[i]; }
    inline   const int&         row_ptr(int i) const { return rowptr_[i]; }
    inline   const int&         col_ind(int i) const { return colind_[i];}
 
    inline   int    dim1() const {return dim1_;}
    inline   int    dim2() const {return dim2_;}
       int          NumNonzeros() const {return val_.dim1();}
 
 
    Sparse_Matrix_CompRow& operator=(
                                        const Sparse_Matrix_CompRow &R);
 
 
 
};
 
template <class T>
Sparse_Matrix_CompRow<T>::Sparse_Matrix_CompRow(int M, int N, int nz,
        const T *val, const int *r, const int *c) : val_(nz,val),
                                                    rowptr_(M, (int*)r), colind_(nz, (int*)c), dim1_(M), dim2_(N) {}
 
 
}
// namespace TNT
 
#endif