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engines/glk/scott/restore_state.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Based on ScottFree interpreter version 1.14 developed by Swansea
+ * University Computer Society without disassembly of any other game
+ * drivers, only of game databases as permitted by EEC law (for purposes
+ * of compatibility).
+ *
+ * Licensed under GPLv2
+ *
+ * https://github.com/angstsmurf/spatterlight/tree/master/terps/scott
+ */
+
+#ifndef GLK_SCOTT_RESTORESTATE_H
+#define GLK_SCOTT_RESTORESTATE_H
+
+#include "glk/scott/types.h"
+
+namespace Glk {
+namespace Scott {
+
+struct SavedState {
+	int _counters[16];
+	int _roomSaved[16];
+	uint32_t _bitFlags = 0;
+	int _currentLoc = 0;
+	int _currentCounter = 0;
+	int _savedRoom = 0;
+	int _lightTime = 0;
+	int _autoInventory = 0;
+	uint8_t *_itemLocations = nullptr;
+	SavedState *_previousState = nullptr;
+	SavedState *_nextState = nullptr;
+};
+
+void saveUndo();
+void restoreUndo();
+void ramSave();
+void ramRestore();
+SavedState *saveCurrentState();
+void recoverFromBadRestore(SavedState *state);
+void restoreState(SavedState *state);
+
+} // End of namespace Scott
+} // End of namespace Glk
+
+#endif