max@0: // Copyright (C) 2008-2011 NICTA (www.nicta.com.au)
max@0: // Copyright (C) 2008-2011 Conrad Sanderson
max@0: // 
max@0: // This file is part of the Armadillo C++ library.
max@0: // It is provided without any warranty of fitness
max@0: // for any purpose. You can redistribute this file
max@0: // and/or modify it under the terms of the GNU
max@0: // Lesser General Public License (LGPL) as published
max@0: // by the Free Software Foundation, either version 3
max@0: // of the License or (at your option) any later version.
max@0: // (see http://www.opensource.org/licenses for more info)
max@0: 
max@0: 
max@0: //! \addtogroup diagview
max@0: //! @{
max@0: 
max@0: 
max@0: //! Class for storing data required to extract and set the diagonals of a matrix
max@0: template<typename eT>
max@0: class diagview : public Base<eT, diagview<eT> >
max@0:   {
max@0:   public:    arma_aligned const Mat<eT>& m;
max@0:   protected: arma_aligned       Mat<eT>* m_ptr;
max@0:   
max@0:   public:
max@0:   
max@0:   typedef eT                                elem_type;
max@0:   typedef typename get_pod_type<eT>::result pod_type;
max@0:   
max@0:   const uword row_offset;
max@0:   const uword col_offset;
max@0:   
max@0:   const uword n_rows;     // equal to n_elem
max@0:   const uword n_elem;
max@0:   
max@0:   static const uword n_cols = 1;
max@0:   
max@0:   
max@0:   protected:
max@0:   
max@0:   arma_inline diagview(const Mat<eT>& in_m, const uword in_row_offset, const uword in_col_offset, const uword len);
max@0:   arma_inline diagview(      Mat<eT>& in_m, const uword in_row_offset, const uword in_col_offset, const uword len);
max@0:   
max@0:   
max@0:   public:
max@0:   
max@0:   inline ~diagview();
max@0:   
max@0:   inline void operator=(const diagview& x);
max@0:   
max@0:   inline void operator+=(const eT val);
max@0:   inline void operator-=(const eT val);
max@0:   inline void operator*=(const eT val);
max@0:   inline void operator/=(const eT val);
max@0:   
max@0:   template<typename T1> inline void operator= (const Base<eT,T1>& x);
max@0:   template<typename T1> inline void operator+=(const Base<eT,T1>& x);
max@0:   template<typename T1> inline void operator-=(const Base<eT,T1>& x);
max@0:   template<typename T1> inline void operator%=(const Base<eT,T1>& x);
max@0:   template<typename T1> inline void operator/=(const Base<eT,T1>& x);
max@0:   
max@0:   
max@0:   arma_inline eT& operator[](const uword i);
max@0:   arma_inline eT  operator[](const uword i) const;
max@0:   
max@0:   arma_inline eT&         at(const uword i);
max@0:   arma_inline eT          at(const uword i) const;
max@0:   
max@0:   arma_inline eT& operator()(const uword i);
max@0:   arma_inline eT  operator()(const uword i) const;
max@0:   
max@0:   arma_inline eT&         at(const uword in_n_row, const uword in_n_col);
max@0:   arma_inline eT          at(const uword in_n_row, const uword in_n_col) const;
max@0:    
max@0:   arma_inline eT& operator()(const uword in_n_row, const uword in_n_col);
max@0:   arma_inline eT  operator()(const uword in_n_row, const uword in_n_col) const;
max@0:   
max@0:   
max@0:   inline void fill(const eT val);
max@0:   inline void zeros();
max@0:   inline void ones();
max@0:   
max@0:   inline static void extract(Mat<eT>& out, const diagview& in);
max@0:   
max@0:   inline static void  plus_inplace(Mat<eT>& out, const diagview& in);
max@0:   inline static void minus_inplace(Mat<eT>& out, const diagview& in);
max@0:   inline static void schur_inplace(Mat<eT>& out, const diagview& in);
max@0:   inline static void   div_inplace(Mat<eT>& out, const diagview& in);
max@0:   
max@0:   
max@0:   private:
max@0:   
max@0:   friend class Mat<eT>;
max@0:   friend class subview<eT>;
max@0:   
max@0:   diagview();
max@0:   //diagview(const diagview&);  // making this private causes an error under gcc 4.1/4.2, but not 4.3
max@0:   };
max@0: 
max@0: 
max@0: //! @}