Initial revision

source/gameengine/Expressions/InputParser.h

@@ -0,0 +1,105 @@
+/*
+ * Parser.h: interface for the CParser class.
+ * Eindhoven University of Technology 1997
+ * OOPS team (Serge vd Boom, Erwin Coumans, Tom Geelen, Wynke Stuylemeier)
+ * $Id$
+ * Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Erwin Coumans makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ */
+#ifndef __INPUTPARSER_H__
+#define __INPUTPARSER_H__
+
+class CParser;
+#include "Expression.h"
+
+
+class CParser
+{
+public:
+	CParser();
+	virtual				~CParser();
+
+	float				GetFloat(STR_String txt);
+	CValue*				GetValue(STR_String txt, bool bFallbackToText=false);
+	CExpression*		ProcessText(STR_String intext);
+	void				SetContext(CValue* context);
+
+private:
+	enum symbols {
+		errorsym,
+		lbracksym,
+		rbracksym,
+		cellsym,
+		commasym,
+		opsym,
+		constsym,
+		sumsym,
+		ifsym,
+		whocodedsym,
+		eolsym,
+		idsym
+	};			// all kinds of symbols
+
+	enum optype {
+		OPplus,
+		OPminus,
+		OPtimes,
+		OPdivide,
+		OPand,
+		OPor,
+		OPequal,
+		OPunequal,
+		OPgreater,
+		OPless,
+		OPgreaterequal,
+		OPlessequal,
+		OPnot
+	};		// all kinds of operators
+
+	enum consttype {
+		booltype,
+		inttype,
+		floattype,
+		stringtype
+	};		// all kinds of constants
+	
+	int sym,					// current symbol
+		opkind,					// kind of operator, if symbol is an operator
+		constkind;				// kind of operator, if symbol is a constant
+	
+	char ch;					// current character
+	int chcount;				// index to character in input string
+	CExpression *errmsg;		// contains a errormessage, if scanner error
+	
+	STR_String text,				// contains a copy of the original text
+		const_as_string;		// string representation of the symbol, if symbol is a constant
+	bool boolvalue;				// value of the boolean, if symbol is a constant of type boolean
+	CValue*	m_identifierContext;// context in which identifiers are looked up
+	
+	
+	void ScanError(STR_String str);
+	CExpression* Error(STR_String str);
+	void NextCh();
+	void TermChar(char c);
+	void DigRep();
+	void CharRep();
+	void GrabString(int start);
+	void NextSym();
+	int MakeInt();
+	STR_String Symbol2Str(int s);
+	void Term(int s);
+	int Priority(int optor);
+	CExpression *Ex(int i);
+	CExpression *Expr();
+
+};
+
+#endif