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103 lines
3.6 KiB
103 lines
3.6 KiB
/***************************************************************************
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mpformula.h
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-------------------
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begin : Sun Nov 18 2001
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copyright : (C) 2001 by Kamil
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email : kamil@localhost.localdomain
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef MPFORMULA_H
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#define MPFORMULA_H
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#include <qstring.h>
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#include <qptrlist.h>
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#include "mpparser.cpp.h"
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#include "mpparsersymbol.h"
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//---------------------------------------------------------------------------//
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/**
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* List of factories
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*/
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class MPFactoryList : public QPtrList<MPSymbolFactory>
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{
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public:
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MPFactoryList() : QPtrList<MPSymbolFactory>() { setAutoDelete(TRUE); }
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MPFactoryList( MPSymbolFactory *oneElement ) { setAutoDelete(TRUE); append(oneElement); }
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~MPFactoryList() {}
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};
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//---------------------------------------------------------------------------//
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/**
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* Parses string and returns an expression tree.
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* MPSymbol *QSFormula::parse( const QString& formula, MPError& error, FactoryList *locals )
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* @author Kamil
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*/
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class MPFormula {
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friend int yylex( MPParserSymbol *symbol_value, void *location_info_ptr, void *formula_ptr );
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friend void yyerr( const char *message, void *location_info_ptr, void *formula_ptr );
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friend int yyparse( void *formula_ptr );
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public:
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/**
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* Constructor.
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*/
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MPFormula();
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/**
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* Destructor
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*/
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virtual ~MPFormula();
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/**
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* Parses the given string and returns expression. If the error occurs the NULL is
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* returned and error info is passes in 'error' object.
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*/
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MPSymbol *parse( const QString& formula, MPError& error, MPFactoryList *locals=NULL );
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/**
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* Adds global symbols. They will be shared by all QSFormula objects.
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*/
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static void addGlobalSymbols( MPSymbolFactory *factory );
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/**
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* Removes a global symbols.
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*/
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static void delGlobalSymbols( MPSymbolFactory *factory );
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private:
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int m_char;
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QString m_formula;
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MPSymbol *m_root_sym;
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MPError *m_error;
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MPFactoryList *m_local_symbols;
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static MPFactoryList m_global_symbols;
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QChar curr_char() const;
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QChar apply_char( QString& append_to );
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MPSymbol *get_symbol( const QString &id, MPSymbolList *args, int colFrom, int colTo );
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};
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//----------------------------------------------------------------------------------------------//
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class MPFormulaError : public MPError {
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public:
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MPFormulaError();
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virtual ~MPFormulaError();
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virtual void setWrongNumberOfArguments( int currArgs, int correctArgs, MPSymbol *expression );
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virtual void setNonconformantArgument( int arg_nr, MPSymbol *expression, MPSymbol *sym );
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virtual void setUndefinedSymbol( const char *symbol, int colFrom, int colTo );
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virtual void setParseError( int colFrom, int colTo );
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virtual void setError( const char *message, MPSymbol *expression );
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QString message() { return m_msg; }
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private:
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QString m_msg;
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QString standard_message( MPSymbol *expression );
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};
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#endif
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