constant.h

高效的c++科学算法库

/*                                           -*- c++ -*-
 ******************************
 * Scientific Library (GNU Public Licence)
 *
 * Author: Laurent Deniau, [e-mail]
 *
 * $Id: constant.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_CONSTANT_CONSTANT_H
#define SL_MATRIX_STRUCTURES_CONSTANT_CONSTANT_H

#ifndef SL_MATRIX_STRUCTURES_CONSTANT_H
#error <sl/matrix/structures/constant/constant.h> must be included via <sl/matrix/structures/constant.h>
#endif

#ifdef HAVE_NAMESPACE
namespace sl 
{
#endif

    class TConstant : public MatrixStructure {


          /** @name Explanation
              
           Constant matrix structure

          */
        
      public:

        typedef ConstantIterator iterator_t;

          /// doc 
        size_t size () const { return  1; }
          /// doc 
        Index  rows () const { return my_n; }
          /// doc 
        Index  cols () const { return my_p; }
          /// doc 
        Index firstInRow (Index const i) const { return MinIndex; }
          /// doc 
        Index firstInCol (Index const j) const { return MinIndex; }
          /// doc 
        Index lastInRow  (Index const i) const { return MinIndex; }
          /// doc 
        Index lastInCol  (Index const j) const { return MinIndex; }
          /// doc 
        static Bool isRowMajor () { return true; }
          /// map(MinIndex,MinIndex)
        ptrdiff_t offset () const { return 0; }
          /// doc 
        explicit
            TConstant () : my_n (0), my_p (0) { }
          /// doc 
        explicit
            TConstant (Index const n) : my_n (n), my_p (1) { }
          /// doc 
            TConstant (Index const n, Index const p) : my_n (n), my_p (p) { }
          // WARNING: Do NOT declare the copy constructor !
          /// doc 
        void
            resize (Index const n, Index const p) {
            my_n = n; my_p = p;
        }
          /// doc 
        template <typename T_value>
            T_value&
            get (T_value* const data, Index const i, Index const j) {
            return data[0];
        }
          /// doc 
        template <typename T_value>
            T_value
            get (T_value const* const data, Index const i, Index const j) const {
            return data[0];
        }

      private:
          /// doc
        Index my_n;
          /// doc
        Index my_p;
    };


#ifdef HAVE_NAMESPACE
}
#endif 

#endif // SL_MATRIX_STRUCTURES_CONSTANT_CONSTANT_H