iterator.h

高效的c++科学算法库

/*                                           -*- c++ -*-
 ******************************
 * Scientific Library (GNU Public Licence)
 *
 * Author: Laurent Deniau, [e-mail]
 *
 * $Id: iterator.h,v 1.1 1998/11/05 12:48:37 paubert Exp $
 *
 * Suggestions: [e-mail]
 * Bugs:   [e-mail]
 *
 * For more information, please see the sl++ Home Page:
 * http://wwwinfo.cern.ch/~ldeniau/sl.html
 *
 ******************************
 */

#ifndef SL_MATRIX_STRUCTURES_COLMAJOR_ITERATOR_H
#define SL_MATRIX_STRUCTURES_COLMAJOR_ITERATOR_H

#ifndef SL_MATRIX_STRUCTURES_COLMAJOR_H
#error <sl/matrix/structures/colmajor/iterator.h> must be included via <sl/matrix/structures/colmajor.h>
#endif

#ifdef HAVE_NAMESPACE
namespace sl 
{
#endif


// Column major matrix structure

//
// [1 4 7]
// [2 5 8]
// [3 6 9]
//


      /** @memo 
       */
    class ColMajorIterator : public GeneralIterator {


      public:

        typedef ColMajor structure_t;


      public:

            ColMajorIterator(structure_t const* structure,
                             Index const i =MinIndex, Index const j =MinIndex)
            : GeneralIterator(structure->rows(),
                              structure->cols(),
                              i, j, structure->rows()*j+i) {}
        


      public:

        void
            operator ++ () {
            if (++my_i > my_n) {
                my_i = MinIndex;
                if (++my_j > my_p) my_ok = false;
            }
            ++my_o;
        }

        void
            incRow() {
            if (++my_i > my_n) my_ok = false;
            else ++my_o;
        }

        void
            incCol() {
            if (++my_j > my_p) my_ok = false;
            else my_o += my_n;
        }
    };

#ifdef HAVE_NAMESPACE
}
#endif 

#endif // SL_MATRIX_STRUCTURES_COLMAJOR_COLMAJOR_H