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+// base-min.h                                                -*- C++ -*-
+/*
+
+Copyright (C) 1995 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_base_min_h)
+#define octave_base_min_h 1
+
+#include "dColVector.h"
+
+class base_minimizer
+{
+ public:
+
+  base_minimizer (void) : x () { }
+
+  base_minimizer (const ColumnVector& xx) : x (xx) { }
+
+  base_minimizer (const base_minimizer& a) { x = a.x; }
+
+  virtual ~base_minimizer (void) { }
+
+  base_minimizer& operator = (const base_minimizer& a)
+    {
+      x = a.x;
+
+      return *this;
+    }
+
+  // Derived classes must provide a function to actually do the
+  // minimization.
+
+  virtual ColumnVector do_minimize (double& objf, int& inform,
+				    ColumnVector& lambda) = 0;
+
+  // Lots of ways to call the single function and optionally set and
+  // get additional information.
+
+  virtual ColumnVector minimize (void)
+    {
+      double objf;
+      int inform;
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (double& objf)
+    {
+      int inform;
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (double& objf, int& inform)
+    {
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (double& objf, int& inform,
+				 ColumnVector& lambda)
+    {
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (const ColumnVector& x0)
+    {
+      x = x0;
+      double objf;
+      int inform;
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (const ColumnVector& x0, double& objf)
+    {
+      x = x0;
+      int inform;
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (const ColumnVector& x0, double& objf,
+				 int& inform)
+    {
+      x = x0;
+      Vector lambda;
+      return do_minimize (objf, inform, lambda);
+    }
+
+  virtual ColumnVector minimize (const ColumnVector& x0, double& objf,
+				 int& inform, ColumnVector& lambda)
+    {
+      x = x0;
+      return do_minimize (objf, inform, lambda);
+    }
+
+protected:
+
+  ColumnVector x;
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/