Utils/Scripter/codegen.h

@@ -0,0 +1,124 @@
+/*=========================================================================
+
+	func.h
+
+	Author:		PKG
+	Created:
+	Project:	Spongebob
+	Purpose:
+
+	Copyright (c) 2000 Climax Development Ltd
+
+===========================================================================*/
+
+#ifndef __CODEGEN_H__
+#define	__CODEGEN_H__
+
+/*----------------------------------------------------------------------
+	Includes
+	-------- */
+
+/*	Std Lib
+	------- */
+
+/*----------------------------------------------------------------------
+	Tyepdefs && Defines
+	------------------- */
+
+typedef enum
+{
+	// Statements
+	STMT_LIST,				// list of statements [left-part, right-part] (left-part may be another list)
+	EMPTY_STMT,				// empty statement
+	PRINT_STMT,				// print [variable]
+	STOP_STMT,				// stop
+	PAUSE_STMT,				// pause
+	IF_STMT,				// if [expression, ifcode]
+	IFELSE_STMT,			// if [expression, ifcode, elsecode]
+		
+	// Expressions
+	ASSIGN_EXPR,			// assignment [variable, value]
+	EQUAL_EXPR,				// == [variable, value]
+	NOTEQUAL_EXPR,			// != [variable, value]
+	VARIABLE_EXPR,			// variable
+	VALUE_EXPR,				// value
+	PLUS_EXPR,				// + [value, value]
+}NodeType;
+
+
+/*----------------------------------------------------------------------
+	Structure defintions
+	-------------------- */
+
+class CTreeNode
+{
+public:
+				CTreeNode(NodeType _type);
+				CTreeNode(NodeType _type,CTreeNode *child1);
+				CTreeNode(NodeType _type,CTreeNode *child1,CTreeNode *child2);
+				CTreeNode(NodeType _type,CTreeNode *child1,CTreeNode *child2,CTreeNode *child3);
+				CTreeNode(NodeType _type,int _data);
+
+	int			generateCode(int _write);
+
+	int			getVariableIdx()				{return m_variableIdx;}
+	int			getValue()						{return m_value;}
+	int			getType()						{return m_type;}
+
+private:
+
+	// Nothing else needs to know these so we may as well protect them
+	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
+	};
+
+	enum{MAX_CHILD_NODES=3};
+
+
+	int				emit(unsigned short _data,int _write);
+	int				emitValue(CTreeNode *_child,int _write);
+
+	NodeType		m_type;
+	CTreeNode		*m_children[MAX_CHILD_NODES];
+	int				m_numChildren;
+
+	signed short	m_variableIdx;
+	signed short	m_value;
+};
+
+
+/*----------------------------------------------------------------------
+	Globals
+	------- */
+
+extern CTreeNode	*s_baseTreeNode;
+
+
+/*----------------------------------------------------------------------
+	Functions
+	--------- */
+
+extern int openOutputFile(char *_filename);
+extern int closeOutputFile();
+
+
+/*---------------------------------------------------------------------- */
+
+#endif	/* __CODEGEN_H__ */
+
+/*===========================================================================
+ end */