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77 lines
2.1 KiB
77 lines
2.1 KiB
15 years ago
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/* This file is part of the KDE project
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Copyright (C) 2002 Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef FSPARSER_H
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#define FSPARSER_H
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#include <qstring.h>
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#include <qstringlist.h>
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#include <qdom.h>
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namespace KFormula { class SymbolTable; }
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class ParserNode;
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/**
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* The parser for simple (C style) formula strings.
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*/
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class FormulaStringParser {
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public:
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FormulaStringParser( const KFormula::SymbolTable& symbolTable, QString formula );
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~FormulaStringParser();
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QDomDocument parse();
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QStringList errorList() const { return m_errorList; }
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private:
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enum TokenType { NUMBER, NAME, PLUS, SUB, MUL, DIV, POW, INDEX, LP, RP, LB, RB,
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ASSIGN, COMMA, SEMIC, NEWLINE, OTHER, EOL };
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ParserNode* parseAssign();
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ParserNode* parseExpr();
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ParserNode* parseTerm();
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ParserNode* parsePower();
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ParserNode* parsePrimary();
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void expect( TokenType type, QString msg );
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QString nextToken();
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bool eol() { return m_formula.length() == pos; }
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void readNumber();
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void readDigits();
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void error( QString err );
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QStringList m_errorList;
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const KFormula::SymbolTable& m_symbolTable;
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QString m_formula;
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uint pos;
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uint line;
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uint column;
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bool m_newlineIsSpace;
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TokenType currentType;
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QString current;
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ParserNode* head;
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};
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#endif
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