muParserTokenReader.h

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/*
                 __________                                      
    _____   __ __\______   \_____  _______  ______  ____ _______ 
   /     \ |  |  \|     ___/\__  \ \_  __ \/  ___/_/ __ \\_  __ \
  |  Y Y  \|  |  /|    |     / __ \_|  | \/\___ \ \  ___/ |  | \/
  |__|_|  /|____/ |____|    (____  /|__|  /____  > \___  >|__|   
        \/                       \/            \/      \/        
  Copyright (C) 2004-2008 Ingo Berg

  Permission is hereby granted, free of charge, to any person obtaining a copy of this 
  software and associated documentation files (the "Software"), to deal in the Software
  without restriction, including without limitation the rights to use, copy, modify, 
  merge, publish, distribute, sublicense, and/or sell copies of the Software, and to 
  permit persons to whom the Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all copies or 
  substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
  NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
*/

#ifndef MU_PARSER_TOKEN_READER_H
#define MU_PARSER_TOKEN_READER_H

#include <cassert>
#include <cstdio>
#include <cstring>
#include <map>
#include <memory>
#include <stack>
#include <string>

#include "muParserDef.h"
#include "muParserToken.h"

namespace mu
{
  // Forward declaration
  class ParserBase;

  class ParserTokenReader 
  {
  private:

      typedef ParserToken<value_type, string_type> token_type;

  public:

      ParserTokenReader(ParserBase *a_pParent);
      ParserTokenReader* Clone(ParserBase *a_pParent) const;

      void AddValIdent(identfun_type a_pCallback);
      void SetVarCreator(facfun_type a_pFactory, void *pUserData);
      void SetFormula(const string_type &a_strFormula);
      void SetArgSep(char_type cArgSep);

      int GetPos() const;
      const string_type& GetFormula() const;
      const varmap_type& GetUsedVar() const;
      char_type GetArgSep() const;

      void IgnoreUndefVar(bool bIgnore);
      void ReInit();
      token_type ReadNextToken();

  private:

      enum ESynCodes
      {
        noBO      = 1 << 0,  
        noBC      = 1 << 1,  
        noVAL     = 1 << 2,  
        noVAR     = 1 << 3,  
        noARG_SEP = 1 << 4,  
        noFUN     = 1 << 5,  
        noOPT     = 1 << 6,  
        noPOSTOP  = 1 << 7,  
              noINFIXOP = 1 << 8,  
        noEND     = 1 << 9,  
        noSTR     = 1 << 10, 
        noASSIGN  = 1 << 11, 
        noANY     = ~0       
      };        

      ParserTokenReader(const ParserTokenReader &a_Reader);
      ParserTokenReader& operator=(const ParserTokenReader &a_Reader);
      void Assign(const ParserTokenReader &a_Reader);

      void SetParent(ParserBase *a_pParent);
      int ExtractToken(const char_type *a_szCharSet, 
                       string_type &a_strTok, 
                       int a_iPos) const;
      bool IsBuiltIn(token_type &a_Tok);
      bool IsArgSep(token_type &a_Tok);
      bool IsEOF(token_type &a_Tok);
      bool IsInfixOpTok(token_type &a_Tok);
      bool IsFunTok(token_type &a_Tok);
      bool IsPostOpTok(token_type &a_Tok);
      bool IsOprt(token_type &a_Tok);
      bool IsValTok(token_type &a_Tok);
      bool IsVarTok(token_type &a_Tok);
      bool IsStrVarTok(token_type &a_Tok);
      bool IsUndefVarTok(token_type &a_Tok);
      bool IsString(token_type &a_Tok);
      void Error(EErrorCodes a_iErrc, 
                 int a_iPos = -1, 
                 const string_type &a_sTok = string_type() ) const;

      token_type& SaveBeforeReturn(const token_type &tok);

      ParserBase *m_pParser;
      string_type m_strFormula;
      int  m_iPos;
      int  m_iSynFlags;
      bool m_bIgnoreUndefVar;

      const funmap_type *m_pFunDef;
      const funmap_type *m_pPostOprtDef;
      const funmap_type *m_pInfixOprtDef;
      const funmap_type *m_pOprtDef;
      const valmap_type *m_pConstDef;
      const strmap_type *m_pStrVarDef;
      varmap_type *m_pVarDef;  
      facfun_type m_pFactory;
      void *m_pFactoryData;
      std::vector<identfun_type> m_vIdentFun; 
      varmap_type m_UsedVar;
      value_type m_fZero;      
      int m_iBrackets;
      token_type m_lastTok;
      char_type m_cArgSep;     
  };
} // namespace mu

#endif