145 lines
4.0 KiB
C++
145 lines
4.0 KiB
C++
/*=========================================================================
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func.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 __CODEGEN_H__
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#define __CODEGEN_H__
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/*----------------------------------------------------------------------
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Includes
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-------- */
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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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typedef enum
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{
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// Statements
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STMT_LIST, // list of statements [left-part, right-part] (left-part may be another list)
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EMPTY_STMT, // empty statement
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PRINT_STMT, // print [variable]
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STOP_STMT, // stop
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PAUSE_STMT, // pause
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IF_STMT, // if [expression, ifcode]
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IFELSE_STMT, // if [expression, ifcode, elsecode]
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WHILE_STMT, // while [expression, code]
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DOWHILE_STMT, // do [code] while [expression]
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POP_STMT, // pop
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// Expressions
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ASSIGN_EXPR, // assignment [variable, value]
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EQUAL_EXPR, // == [variable, value]
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NOTEQUAL_EXPR, // != [variable, value]
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LESSTHAN_EXPR, // < [variable, value]
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GREATERTHAN_EXPR, // > [variable, value]
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VARIABLE_EXPR, // variable
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VALUE_EXPR, // value
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PLUS_EXPR, // + [value, value]
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SUBTRACT_EXPR, // - [value, value]
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MULTIPLY_EXPR, // * [value, value]
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DIVIDE_EXPR, // / [value, value]
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FUNCTION_EXPR, // function [functionNumber]
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}NodeType;
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/*----------------------------------------------------------------------
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Structure defintions
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-------------------- */
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class CTreeNode
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{
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public:
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CTreeNode(NodeType _type);
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CTreeNode(NodeType _type,CTreeNode *child1);
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CTreeNode(NodeType _type,CTreeNode *child1,CTreeNode *child2);
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CTreeNode(NodeType _type,CTreeNode *child1,CTreeNode *child2,CTreeNode *child3);
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CTreeNode(NodeType _type,int _data);
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int generateCode(int _write);
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int getVariableIdx() {return m_variableIdx;}
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int getValue() {return m_value;}
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int getType() {return m_type;}
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int getFunctionNumber() {return m_functionNumber;}
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private:
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// Nothing else needs to know these so we may as well protect them
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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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enum{MAX_CHILD_NODES=3};
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int emit(unsigned short _data,int _write);
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int emitValue(CTreeNode *_child,int _write);
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NodeType m_type;
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CTreeNode *m_children[MAX_CHILD_NODES];
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int m_numChildren;
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int m_functionNumber;
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signed short m_variableIdx;
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signed short m_value;
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};
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/*----------------------------------------------------------------------
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Globals
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------- */
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extern CTreeNode *s_baseTreeNode;
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/*----------------------------------------------------------------------
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Functions
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--------- */
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extern int parseFile(char *_filename,class CTreeNode *_baseNode);
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extern int openOutputFile(char *_filename);
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extern int closeOutputFile();
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/*---------------------------------------------------------------------- */
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#endif /* __CODEGEN_H__ */
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/*===========================================================================
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end */
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