CFGNormalizer.h

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//===----- CFGNormalizer.h -- Context Free Grammar Normalizer--------------//
//
//                     SVF: Static Value-Flow Analysis
//
// Copyright (C) <2013->  <Yulei Sui>
//
 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
 
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
//===----------------------------------------------------------------------===//
 
/*
 * CFGNormalizer.h
 *
 *  Created on: April 19 , 2022
 *      Author: Pei Xu
 */
 
#ifndef INCLUDE_CFL_CFGNORMALIZER_H_
#define INCLUDE_CFL_CFGNORMALIZER_H_
 
#include "CFGrammar.h"
 
namespace SVF
{
 
class CFGNormalizer
{
 
public:
    CFGNormalizer()
    {
    }
 
    CFGrammar* normalize(GrammarBase *generalGrammar);
 
    CFGrammar* fillAttribute(CFGrammar *grammar, const Map<CFGrammar::Kind, Set<CFGrammar::Attribute>>& kindToAttrsMap);
 
private:
    void ebnf_bin(CFGrammar *grammar);
 
    void ebnfSignReplace(char sign, CFGrammar *grammar);
 
    void barReplace(CFGrammar *grammar);
 
    void insertToCFLGrammar(CFGrammar *grammar, GrammarBase::Production &prod);
 
    int ebnfBracketMatch(GrammarBase::Production& prod, int i, CFGrammar *grammar) ;
 
    GrammarBase::Symbol check_head(GrammarBase::SymbolMap<GrammarBase::Symbol, GrammarBase::Productions>& grammar, GrammarBase::Production& rule);
 
    void strTrans(std::string strPro, CFGrammar *grammar, GrammarBase::Production& normalProd);
 
    void getFilledProductions(GrammarBase::Production &prod,const NodeSet& nodeSet, CFGrammar *grammar, GrammarBase::Productions& normalProds);
 
    void removeFirstSymbol(CFGrammar *grammar);
};
 
} // End namespace SVF
 
#endif /* INCLUDE_CFL_CFGNORMALIZER_H_*/