121 lines
2.8 KiB
C++
121 lines
2.8 KiB
C++
/*
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* Parser.h: interface for the CParser class.
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* Eindhoven University of Technology 1997
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* OOPS team (Serge vd Boom, Erwin Coumans, Tom Geelen, Wynke Stuylemeier)
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* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Erwin Coumans makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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/** \file InputParser.h
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* \ingroup expressions
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*/
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#ifndef __INPUTPARSER_H__
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#define __INPUTPARSER_H__
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class CParser;
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#include "Expression.h"
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class CParser
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{
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public:
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CParser();
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virtual ~CParser();
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float GetFloat(STR_String& txt);
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CValue* GetValue(STR_String& txt, bool bFallbackToText=false);
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CExpression* ProcessText(const char *intext);
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void SetContext(CValue* context);
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private:
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enum symbols {
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errorsym,
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lbracksym,
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rbracksym,
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cellsym,
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commasym,
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opsym,
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constsym,
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sumsym,
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ifsym,
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whocodedsym,
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eolsym,
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idsym
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}; // all kinds of symbols
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enum optype {
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OPmodulus,
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OPplus,
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OPminus,
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OPtimes,
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OPdivide,
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OPand,
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OPor,
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OPequal,
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OPunequal,
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OPgreater,
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OPless,
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OPgreaterequal,
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OPlessequal,
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OPnot
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}; // all kinds of operators
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enum consttype {
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booltype,
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inttype,
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floattype,
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stringtype
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}; // all kinds of constants
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int sym, // current symbol
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opkind, // kind of operator, if symbol is an operator
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constkind; // kind of operator, if symbol is a constant
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char ch; // current character
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int chcount; // index to character in input string
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CExpression *errmsg; // contains a errormessage, if scanner error
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STR_String text, // contains a copy of the original text
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const_as_string; // string representation of the symbol, if symbol is a constant
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bool boolvalue; // value of the boolean, if symbol is a constant of type boolean
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CValue* m_identifierContext;// context in which identifiers are looked up
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void ScanError(const char *str);
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CExpression* Error(const char *str);
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void NextCh();
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void TermChar(char c);
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void DigRep();
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void CharRep();
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void GrabString(int start);
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void GrabRealString(int start);
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void NextSym();
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#if 0 /* not used yet */
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int MakeInt();
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#endif
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STR_String Symbol2Str(int s);
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void Term(int s);
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int Priority(int optor);
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CExpression *Ex(int i);
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CExpression *Expr();
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#ifdef WITH_CXX_GUARDEDALLOC
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public:
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void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:CParser"); }
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void operator delete( void *mem ) { MEM_freeN(mem); }
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#endif
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};
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#endif
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