155 lines
3.1 KiB
C++
155 lines
3.1 KiB
C++
/*=========================================================================
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script.h
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Author: PKG
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Created:
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Project: Spongebob
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Purpose:
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Copyright (c) 2000 Climax Development Ltd
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===========================================================================*/
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#ifndef __SCRIPT_SCRIPT_H__
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#define __SCRIPT_SCRIPT_H__
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/*----------------------------------------------------------------------
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Includes
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-------- */
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#ifndef _FILEIO_HEADER_
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#include "fileio\fileio.h"
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#endif
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/* Std Lib
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------- */
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/*----------------------------------------------------------------------
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Tyepdefs && Defines
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------------------- */
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/*----------------------------------------------------------------------
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Structure defintions
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-------------------- */
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class CScript
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{
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public:
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void initialise(FileEquate _fe);
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void dump();
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void reset();
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void run();
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int isFinished();
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private:
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// Global vars
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enum
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{
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LIVES,
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NUM_GLOBAL_VARS,
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};
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// Local vars
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enum
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{
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TMP0,
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TMP1,
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TMP2,
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TMP3,
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TMP4,
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TMP5,
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TMP6,
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TMP7,
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TMP8,
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TMP9,
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NUM_LOCAL_VARS,
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};
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typedef enum
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{
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RESET,
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PAUSED,
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RUNNING,
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STOPPED,
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STOPPED_STACK_NOT_EMPTY,
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CRASHED_ILLEGAL_OPCODE,
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CRASHED_DIVIDE_BY_ZERO,
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}ScriptState;
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enum
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{
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STACK_SIZE=10,
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MAX_FUNCTION_ARGS=5,
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};
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enum
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{
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// args stack data result
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OP_NOP=0x1100, //
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OP_STOP, //
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OP_PAUSE,
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OP_PUSHVALUE, // value
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OP_PUSHVARVALUE, // varidx
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OP_POP, // value
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OP_JMP, // jump
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OP_JMPF, // jump, value
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OP_JMPT, // jump, value
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OP_IS_EQUAL_VALUE, // value, value pushes result ( 0 or 1 ) to stack
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OP_IS_NOTEQUAL_VALUE, // value, value pushes result ( 0 or 1 ) to stack
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OP_IS_LESSTHAN_VALUE, // value, value pushes result ( 0 or 1 ) to stack
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OP_IS_GREATERTHAN_VALUE,// value, value pushes result ( 0 or 1 ) to stack
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OP_ASSIGN, // varidx, value
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OP_ADD, // value, value pushes result to stack
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OP_MULTIPLY, // value, value pushes result to stack
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OP_DIVIDE, // value, value pushes result to stack
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OP_NEG, // value pushes result to stack
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OP_PRINT, // value
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OP_CALL_FUNCTION, // functionnumber, argcount args pushes return value to stack
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};
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void executeNextInstruction();
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unsigned short readNextInstruction();
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void jump(signed short _distance);
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void push(unsigned short _data);
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unsigned short pop();
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void setVar(int _varIdx,signed short _value);
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signed short getVar(int _varIdx);
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unsigned short *m_code;
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int m_pc;
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unsigned short *m_stack;
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int m_sp;
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static signed short s_globalVars[NUM_GLOBAL_VARS];
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signed short m_localVars[NUM_LOCAL_VARS];
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static unsigned short s_argBuffer[MAX_FUNCTION_ARGS];
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ScriptState m_state;
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};
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/*----------------------------------------------------------------------
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Globals
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------- */
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/*----------------------------------------------------------------------
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Functions
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--------- */
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/*---------------------------------------------------------------------- */
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#endif /* __SCRIPT_SCRIPT_H__ */
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/*===========================================================================
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end */
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