source/script/script.h

@@ -0,0 +1,135 @@
+/*=========================================================================
+
+	script.h
+
+	Author:		PKG
+	Created:
+	Project:	Spongebob
+	Purpose:
+
+	Copyright (c) 2000 Climax Development Ltd
+
+===========================================================================*/
+
+#ifndef	__PAUL_SCRIPT_H__
+#define	__PAUL_SCRIPT_H__
+
+/*----------------------------------------------------------------------
+	Includes
+	-------- */
+
+#ifndef _FILEIO_HEADER_
+#include "fileio\fileio.h"
+#endif
+
+
+/*	Std Lib
+	------- */
+
+/*----------------------------------------------------------------------
+	Tyepdefs && Defines
+	------------------- */
+
+/*----------------------------------------------------------------------
+	Structure defintions
+	-------------------- */
+
+class CScript
+{
+public:
+	void	initialise(FileEquate _fe);
+
+	void	reset();
+	void	run();
+
+	int		isFinished();
+
+private:
+	// Global vars
+	enum
+	{
+		LIVES,
+		NUM_GLOBAL_VARS,
+	};
+	
+	// Local vars
+	enum
+	{
+		TMP1,
+		TMP2,
+		TMP3,
+		NUM_LOCAL_VARS,
+	};
+
+	typedef enum
+	{
+		RESET,
+		PAUSED,
+		RUNNING,
+
+		STOPPED,
+
+		STOPPED_STACK_NOT_EMPTY,
+		CRASHED_ILLEGAL_OPCODE,
+	}ScriptState;
+
+	enum
+	{
+		STACK_SIZE=20,
+	};
+
+	enum
+	{
+								//	args				stack data				result
+		OP_NOP=0x1100,			//
+		OP_STOP,				//
+		OP_PAUSE,
+		OP_PUSHVALUE,			//	value
+		OP_PUSHVARVALUE,		//	varidx
+		OP_JMP,					//						jump
+		OP_JMPF,				//						jump, value
+		OP_JMPT,				//						jump, value
+		OP_IS_EQUAL_VALUE,		//						value, value			pushes result ( 0 or 1 ) to stack
+		OP_IS_NOTEQUAL_VALUE,	//						value, value			pushes result ( 0 or 1 ) to stack
+		OP_ASSIGN,				//						varidx, value
+		OP_ADD,					//						value, value			pushes result to stack
+		OP_PRINT,				//						value
+	};
+
+
+	void			executeNextInstruction();
+	unsigned short	readNextInstruction();
+	void			jump(signed short _distance);
+	void			push(unsigned short _data);
+	unsigned short	pop();
+	void			setVar(int _varIdx,signed short _value);
+	signed short	getVar(int _varIdx);
+
+
+	unsigned short	*m_code;
+	int				m_pc;
+
+	unsigned short	*m_stack;
+	int				m_sp;
+
+	static signed short		s_globalVars[NUM_GLOBAL_VARS];
+	signed short			m_localVars[NUM_LOCAL_VARS];
+
+	ScriptState		m_state;
+};
+
+
+/*----------------------------------------------------------------------
+	Globals
+	------- */
+
+/*----------------------------------------------------------------------
+	Functions
+	--------- */
+
+/*---------------------------------------------------------------------- */
+
+#endif	/* __PAUL_SCRIPT_H__ */
+
+/*===========================================================================
+ end */