ODEFunc.h

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// Copyright (C) 1993-2021 The Octave Project Developers
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// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
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#if ! defined (octave_ODEFunc_h)
#define octave_ODEFunc_h 1
 
#include "octave-config.h"
 
class Matrix;
class ColumnVector;
 
class
ODEFunc
{
public:
 
  typedef ColumnVector (*ODERHSFunc) (const ColumnVector&, double);
  typedef Matrix (*ODEJacFunc) (const ColumnVector&, double);
 
  ODEFunc (void)
    : fun (nullptr), jac (nullptr), reset (true) { }
 
  ODEFunc (ODERHSFunc f)
    : fun (f), jac (nullptr), reset (true) { }
 
  ODEFunc (ODERHSFunc f, ODEJacFunc j)
    : fun (f), jac (j), reset (true) { }
 
  ODEFunc (const ODEFunc& a)
    : fun (a.fun), jac (a.jac), reset (true) { }
 
  ODEFunc& operator = (const ODEFunc& a)
  {
    if (this != &a)
      {
        fun = a.fun;
        jac = a.jac;
        reset = a.reset;
      }
    return *this;
  }
 
  virtual ~ODEFunc (void) = default;
 
  ODERHSFunc function (void) const { return fun; }
 
  ODEFunc& set_function (ODERHSFunc f)
  {
    fun = f;
    reset = true;
    return *this;
  }
 
  ODEJacFunc jacobian_function (void) const { return jac; }
 
  ODEFunc& set_jacobian_function (ODEJacFunc j)
  {
    jac = j;
    reset = true;
    return *this;
  }
 
protected:
 
  ODERHSFunc fun;
  ODEJacFunc jac;
 
  // This variable is TRUE when this object is constructed, and also
  // after any internal data has changed.  Derived classes may use
  // this information (and change it) to know when to (re)initialize
  // their own internal data related to this object.
 
  bool reset;
};
 
#endif