// This file is part of PUMA.
// Copyright (C) 1999-2003  The PUMA developer team.
//                                                                
// 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.            
//                                                                
// 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 __pre_macro_manager__
#define __pre_macro_manager__

// The macro manager manages all defined macros.

#include "Puma/Chain.h"
#include "Puma/StrHashTable.h"
#include "Puma/PreMacro.h"
#include <iostream>
using namespace std;

#ifdef __puma
# define PUMA_HTSIZE 1
#else
# define PUMA_HTSIZE StrHashTable::STRHASHTABLE_SIZE
#endif

namespace Puma {


class ErrorStream;

class PreMacroManager {
  PreMacro *_Line;
  PreMacro *_Date;
  PreMacro *_Time;
  PreMacro *_IncLevel;
  PreMacro *_File;
  PreMacro *_BaseFile;

  Chain _tab[PUMA_HTSIZE];

  ErrorStream *_err;        // To report errors.

  void add (PreMacro *);
  void kill (const DString &);
  PreMacro *get (const DString &) const;
  void clear ();
        
public:
  PreMacroManager (ErrorStream *err, int size = 211) : _err (err) {}
        
  // Destroy the predicates too.
  ~PreMacroManager () { clear (); }
        
  // Initialize the macro manager.
  void init (const char *filename);
        
  // Add given macro to macro table.
  void addMacro (PreMacro *macro);
        
  // Remove macro `name' from macro table.
  void removeMacro (const DString &name);
        
  // Get macro `name' from macro table.
  PreMacro *getMacro (const DString &name) const;
        
  // Get pointers to some special macros
  PreMacro *getLineMacro () const { return _Line; }
  PreMacro *getDateMacro () const { return _Date; }
  PreMacro *getTimeMacro () const { return _Time; }
  PreMacro *getIncLevelMacro () const { return _IncLevel; }
  PreMacro *getFileMacro () const { return _File; }
  PreMacro *getBaseFileMacro () const { return _BaseFile; }
};


} // namespace Puma

#endif /* __pre_macro_manager__ */