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diff --git a/ksame/StoneField.h b/ksame/StoneField.h
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+/* Yo Emacs, this is -*- C++ -*- */
+/*
+ *   ksame 0.4 - simple Game
+ *   Copyright (C) 1997,1998  Marcus Kreutzberger
+ *
+ *   This program 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 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#ifndef _STONEFIELD
+#define _STONEFIELD
+
+#include <krandomsequence.h>
+#include <qptrlist.h>
+
+struct Stone {
+     unsigned char color;
+     bool changed;
+     bool marked;
+};
+
+class StoneField;
+class StoneWidget;
+
+class StoneFieldState {
+private:
+     unsigned char *field;
+
+     int colors;
+     unsigned int board;
+     unsigned int score;
+     int gameover;
+
+public:
+     StoneFieldState(const StoneField &stonefield);
+     ~StoneFieldState();
+     void restore(StoneField &stonefield) const;
+};
+
+
+class StoneField {
+	friend class StoneFieldState;
+	friend class StoneWidget;
+private:
+
+	int sizex;
+	int sizey;
+	int maxstone;
+
+	struct Stone *field;
+
+	int colors;
+	unsigned int board;
+	unsigned int score;
+	mutable int gameover;
+	bool m_gotBonus;
+	int marked;
+
+	KRandomSequence random;
+	QPtrList<StoneFieldState> *undolist;
+public:
+	StoneField(int width=15,int height=10,
+			   int colors=3,unsigned int board=0,
+			   bool undoenabled=true);
+	~StoneField();
+
+	int width() const;
+	int height() const;
+
+	void newGame(unsigned int board,int colors);
+
+	void reset();
+
+	int mark(int x,int y,bool force=false);
+	void unmark();
+
+	int remove(int x,int y,bool force=false);
+
+	int undo(int count=1);
+
+	bool isGameover() const;
+	bool gotBonus() const;
+	bool undoPossible() const;
+	int getBoard() const;
+	int getScore() const;
+	int getColors() const;
+	int getMarked() const;
+
+	int count(int color);
+protected:
+	int getFieldSize() const;
+	struct Stone *getField() const;
+
+	int map(int x,int y);
+	void mark(int index,unsigned char color);
+};
+
+#endif // _STONEFIELD
+