CalcLexer.h

Go to the documentation of this file.

/*
// $Id: //open/dev/fennel/calculator/CalcLexer.h#2 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 The Eigenbase Project
// Copyright (C) 2004-2009 SQLstream, Inc.
// Copyright (C) 2009-2009 LucidEra, Inc.
//
// This program is free software; you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef Fennel_CalcLexer_Included
#define Fennel_CalcLexer_Included

#include "fennel/calculator/CalcCommon.h"
#include "fennel/calculator/InstructionCommon.h"
#include "fennel/calculator/CalcTypedefs.h"

#ifdef DONOT_INCLUDE_FLEX_HEADER
class CalcYYFlexLexer;
#else
#undef yyFlexLexer
#define yyFlexLexer CalcYYFlexLexer
#include <FlexLexer.h>
#endif

/*FENNEL_BEGIN_NAMESPACE*/

using namespace fennel;

/* NOTE: Objects with constructor/desctructor/copy not
 * allowed in union. */
typedef union
{
    double      v_double;
    int64_t     v_int64;
    uint64_t    v_uint64;
    TProgramCounter                 v_pc;
    StandardTypeDescriptorOrdinal   v_type;
    RegisterReference::ERegisterSet v_regset;
    RegisterReference*              p_regref;
    Instruction*                    p_inst;
} CalcTokenUnion;

typedef struct
{
    CalcTokenUnion u;
    std::string    v_opcode;
    std::string    v_string;
    std::vector<RegisterReference*> v_register_list;
} CalcTokenValue;


class FENNEL_CALCULATOR_EXPORT CalcLexer
    : public CalcYYFlexLexer
{
  public:
      explicit
      CalcLexer(): CalcYYFlexLexer(), yycolno(1), yylineno(1), yypos(0) {}

      int yylex();

      int getPosition() const       { return yypos;   }
      int getColumn() const         { return yycolno; }
      CalcYYLocType&  getLocation() { return yyloc;   }
      CalcTokenValue& getValue()    { return yylval;  }

      void LexerError(const char* msg);

  protected:
      void updateLocation();

      int hex(char ch);
      string hex2string(const char* buf, uint buflen);

      int yycolno;
      int yylineno;
      int yypos;
      CalcTokenValue yylval;
      CalcYYLocType  yyloc;
};

/*FENNEL_END_NAMESPACE */

#endif

// End CalcLexer

---