code.delx.au - gnu-emacs/blob - test/manual/etags/cp-src/MDiagArray2.h

   1 // Template array classes with like-type math ops
   2 /*
   3
   4 Copyright (C) 1996 John W. Eaton
   5
   6 This file is part of Octave.
   7
   8 Octave is free software; you can redistribute it and/or modify it
   9 under the terms of the GNU General Public License as published by the
  10 Free Software Foundation; either version 2, or (at your option) any
  11 later version.
  12
  13 Octave is distributed in the hope that it will be useful, but WITHOUT
  14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with Octave; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21
  22 */
  23
  24 #if defined (__GNUG__)
  25 #pragma interface
  26 #endif
  27
  28 #if !defined (octave_MDiagArray2_h)
  29 #define octave_MDiagArray2_h 1
  30
  31 #include "DiagArray2.h"
  32 #include "MArray2.h"
  33
  34 #if defined (LTGT)
  35 #undef LTGT
  36 #endif
  37
  38 #if !defined (CXX_NEW_FRIEND_TEMPLATE_DECL)
  39 #define LTGT
  40 #else
  41
  42 #define LTGT <>
  43
  44 template <class T>
  45 class MDiagArray2;
  46
  47 template <typename T> MDiagArray2<T>&
  48 operator += (MDiagArray2<T>& a, const MDiagArray2<T>& b);
  49
  50 template <typename T> MDiagArray2<T>&
  51 operator -= (MDiagArray2<T>& a, const MDiagArray2<T>& b);
  52
  53 template <typename T> MDiagArray2<T>
  54 operator * (const MDiagArray2<T>& a, const T& s);
  55
  56 template <typename T> MDiagArray2<T>
  57 operator / (const MDiagArray2<T>& a, const T& s);
  58
  59 template <typename T> MDiagArray2<T>
  60 operator * (const T& s, const MDiagArray2<T>& a);
  61
  62 template <typename T> MDiagArray2<T>
  63 operator + (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
  64
  65 template <typename T> MDiagArray2<T>
  66 operator - (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
  67
  68 template <typename T> MDiagArray2<T>
  69 product (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
  70
  71 template <typename T> MDiagArray2<T>
  72 operator - (const MDiagArray2<T>& a);
  73 #endif
  74
  75 // Two dimensional diagonal array with math ops.
  76
  77 template <class T>
  78 class MDiagArray2 : public DiagArray2<T>
  79 {
  80 protected:
  81
  82   MDiagArray2 (T *d, int r, int c) : DiagArray2<T> (d, r, c) { }
  83
  84 public:
  85
  86   MDiagArray2 (void) : DiagArray2<T> () { }
  87   MDiagArray2 (int r, int c) : DiagArray2<T> (r, c) { }
  88   MDiagArray2 (int r, int c, const T& val) : DiagArray2<T> (r, c, val) { }
  89   MDiagArray2 (const Array<T>& a) : DiagArray2<T> (a) { }
  90   MDiagArray2 (const DiagArray2<T>& a) : DiagArray2<T> (a) { }
  91   MDiagArray2 (const MDiagArray2<T>& a) : DiagArray2<T> (a) { }
  92
  93   ~MDiagArray2 (void) { }
  94
  95   MDiagArray2<T>& operator = (const MDiagArray2<T>& a)
  96     {
  97       DiagArray2<T>::operator = (a);
  98       return *this;
  99     }
 100
 101   operator MArray2<T> () const
 102     {
 103       MArray2<T> retval (nr, nc,  T (0));
 104
 105       int len = nr < nc ? nr : nc;
 106
 107       for (int i = 0; i < len; i++)
 108         retval.xelem (i, i) = xelem (i, i);
 109
 110       return retval;
 111     }
 112
 113   // element by element MDiagArray2 by MDiagArray2 ops
 114
 115   friend MDiagArray2<T>&
 116   operator += LTGT (MDiagArray2<T>& a, const MDiagArray2<T>& b);
 117
 118   friend MDiagArray2<T>&
 119   operator -= LTGT (MDiagArray2<T>& a, const MDiagArray2<T>& b);
 120
 121   // element by element MDiagArray2 by scalar ops
 122
 123   friend MDiagArray2<T> operator * LTGT (const MDiagArray2<T>& a, const T& s);
 124   friend MDiagArray2<T> operator / LTGT (const MDiagArray2<T>& a, const T& s);
 125
 126   // element by element scalar by MDiagArray2 ops
 127
 128   friend MDiagArray2<T> operator * LTGT (const T& s, const MDiagArray2<T>& a);
 129
 130   // element by element MDiagArray2 by MDiagArray2 ops
 131
 132   friend MDiagArray2<T>
 133   operator + LTGT (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
 134
 135   friend MDiagArray2<T>
 136   operator - LTGT (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
 137
 138   friend MDiagArray2<T>
 139   product LTGT (const MDiagArray2<T>& a, const MDiagArray2<T>& b);
 140
 141   friend MDiagArray2<T> operator - LTGT (const MDiagArray2<T>& a);
 142 };
 143
 144 #undef LTGT
 145
 146 #define INSTANTIATE_MDIAGARRAY_FRIENDS(T) \
 147   template MDiagArray2<T>& operator += (MDiagArray2<T>& a, const MDiagArray2<T>& b); \
 148   template MDiagArray2<T>& operator -= (MDiagArray2<T>& a, const MDiagArray2<T>& b); \
 149   template MDiagArray2<T> operator * (const MDiagArray2<T>& a, const T& s); \
 150   template MDiagArray2<T> operator / (const MDiagArray2<T>& a, const T& s); \
 151   template MDiagArray2<T> operator * (const T& s, const MDiagArray2<T>& a); \
 152   template MDiagArray2<T> operator + (const MDiagArray2<T>& a, const MDiagArray2<T>& b); \
 153   template MDiagArray2<T> operator - (const MDiagArray2<T>& a, const MDiagArray2<T>& b); \
 154   template MDiagArray2<T> product (const MDiagArray2<T>& a, const MDiagArray2<T>& b); \
 155   template MDiagArray2<T> operator - (const MDiagArray2<T>& a);
 156
 157 #endif
 158
 159 /*
 160 ;;; Local Variables: ***
 161 ;;; mode: C++ ***
 162 ;;; End: ***
 163 */