1 files changed, 49 insertions, 3 deletions

diff --git a/engines/m4/mads_logic.h b/engines/m4/mads_logic.h
index ec6eff368b..adafe6f93d 100644
--- a/engines/m4/mads_logic.h
+++ b/engines/m4/mads_logic.h
@@ -29,10 +29,38 @@
 #ifndef M4_MADS_LOGIC_H
 #define M4_MADS_LOGIC_H
 
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+#include "common/stack.h"
 #include "m4/mads_views.h"
 
 namespace M4 {
 
+union ScriptVarValue {
+	const char *strValue;
+	uint32 intValue;
+};
+
+/**
+ * Specifies a script variable that either be a 32-bit unsigned integer or a string pointer
+ */
+class ScriptVar {
+private:
+	ScriptVarValue _value;
+	bool _isInt;
+public:
+	ScriptVar(uint32 v = 0) { _value.intValue = v; _isInt = true; }
+	ScriptVar(const char *s) { _value.strValue = s; _isInt = false; }
+
+	void set(uint32 v) { _value.intValue = v; _isInt = true; }
+	void set(const char *s) { _value.strValue = s; _isInt = false; }
+	const char *getStr() const { assert(!_isInt); return _value.strValue; }
+	uint32 get() const { assert(_isInt); return _value.intValue; }
+	bool isInt() const { return _isInt; }
+
+	operator int() { return get(); }
+};
+
 class MadsSceneLogic {
 private:
 	// Library interface methods
@@ -41,27 +69,45 @@ private:
 	uint16 startCycledSpriteSequence(uint16 srcSpriteIdx, bool flipped, int numTicks, int triggerCountdown, int timeoutTicks, int extraTicks);
 	uint16 startSpriteSequence3(uint16 srcSpriteIdx, bool flipped, int numTicks, int triggerCountdown, int timeoutTicks, int extraTicks);
 	void activateHotspot(int idx, bool active);
-	void lowRoomsEntrySound();
 	void getPlayerSpritesPrefix();
 	void getPlayerSpritesPrefix2();
 private:
 	int _sceneNumber;
 	int16 _spriteIndexes[50];
+	byte *_scriptsData;
+	int _scriptsSize;
+	Common::HashMap<Common::String, uint32> _subroutines;
+	Common::Array<uint32> _subroutineOffsets;
+
+	enum SubFormatIndex {SUBFORMAT_ENTER, SUBFORMAT_STEP, SUBFORMAT_PREACTIONS, SUBFORMAT_ACTIONS};
+	static const char *subFormatList[];
+	static const char *_opcodeStrings[];
 
 	// Support functions
 	const char *formAnimName(char sepChar, int16 suffixNum);
 	void getSceneSpriteSet();
 	void getAnimName();
 
-	IntStorage &dataMap();
+	DataMap &dataMap();
+	void getCallParameters(int numParams, Common::Stack<ScriptVar> &stack, ScriptVar *callParams);
 public:
+	MadsSceneLogic() { _scriptsData = NULL; }
+	~MadsSceneLogic() { delete _scriptsData; }
+
+	void initialiseScripts();
+	void initialiseDataMap();
 	void selectScene(int sceneNum);
 
 	void setupScene();
-	void enterScene();
+	void doEnterScene();
 	void doPreactions();
 	void doAction();
 	void doSceneStep();
+
+	void execute(const Common::String &scriptName);
+	void execute(uint32 scriptOffset);
+	uint32 getParam(uint32 &scriptOffset, int opcode);
+	void callSubroutine(int subIndex, Common::Stack<ScriptVar> &stack);
 };
 
 class MadsGameLogic {