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// -*- c++ -*-
//*****************************************************************************
/** @file BooleEnv.h 
 *
 * @author Alexander Dreyer
 * @date 2006-03-06
 *
 * This file the class BooleEnv, where handles global (static) strucutres of
 * PolyBoRi. 
 *
 * @par Copyright:
 *   (c) 2007 by The PolyBoRi Team
 *
 * @internal 
 * @version \$Id: BooleEnv.h,v 1.6 2008/07/08 21:41:58 alexanderdreyer Exp $
 *
 * @par History:
 * @verbatim
 * $Log: BooleEnv.h,v $
 * Revision 1.6  2008/07/08 21:41:58  alexanderdreyer
 * Merge: from developer's repository
 *
 * Revision 1.2  2008/04/29 09:02:10  bricken
 * + active_ring moved to BooleEnv.cc
 *
 * Revision 1.1  2007/12/13 15:53:48  dreyer
 * CHANGE: Ordering in BoolePolyRing again; BooleEnv manages active ring
 *
 * @endverbatim
**/
//*****************************************************************************

// load PolyBoRi settings
# include "pbori_defs.h"
#include <vector>

#ifndef BooleEnv_h_
#define BooleEnv_h_


BEGIN_NAMESPACE_PBORI


class BoolePolyRing;
extern BoolePolyRing active_ring;
class CDynamicOrderBase;

/** @class BooleEnv
 * @brief This class is just a wrapper accessing global structures.
 *
 *
 **/


class BooleEnv: 
  public CTypes::orderenums_type, public CTypes::compenums_type, 
  public CTypes::auxtypes_type {

 public:
  //-------------------------------------------------------------------------
  // types definitions
  //-------------------------------------------------------------------------

  /// generic access to current type
  typedef BooleEnv self;

  /// generic access to base type
  typedef CTypes::orderenums_type base;

  /// @name adopt global type definitions
  //@{
  typedef CTypes::ordercode_type ordercode_type;
  typedef CTypes::manager_type manager_type;
  typedef CTypes::manager_reference manager_reference;
  typedef CTypes::manager_ptr manager_ptr;
  typedef CTypes::dd_type dd_type;
  typedef CTypes::vartext_type vartext_type;
  //@}

  /// Type for block indices
  typedef std::vector<idx_type> block_idx_type;

  /// Type for block iterators
  typedef block_idx_type::const_iterator block_iterator;

  //-------------------------------------------------------------------------
  // constructors and destructor
  //-------------------------------------------------------------------------

  /// Explicitely mention ordercodes' enumeration
  using base::ordercodes;

  /// Access idx-th variable of the active ring
  static dd_type variable(idx_type idx);

  /// Access idx-th variable
  static dd_type persistentVariable(idx_type idx);

  /// Get numerical code for current ordering
  static ordercode_type getOrderCode();

  /// Get numerical code for current base ordering 
  /// (the same for non-block orderings)
  static ordercode_type getBaseOrderCode();

  /// Get empty decision diagram
  static dd_type zero();

  /// Get decision diagram with all variables negated
  static dd_type one();

  /// Get number of ring variables the of active ring
  static size_type nVariables();

  typedef BoolePolyRing ring_type;

  typedef CDynamicOrderBase order_type;
  static ring_type& ring(){
      return active_ring;
  }

  static manager_type& manager();
  static order_type& ordering();
  /// Set name of variable with index idx
  static void setVariableName(idx_type idx, vartext_type varname);

  /// Get name of variable with index idx
  static vartext_type getVariableName(idx_type idx);

  /// @name interface for block orderings
  //@{
  static block_iterator blockBegin();
  static block_iterator blockEnd();
  static void appendBlock(idx_type idx);
  static void clearBlocks();
  
  static idx_type lastBlockStart();
  //@}

  /// Change order of current ring
  static void changeOrdering(ordercode_type code);

  static void printInfo();

  static void set(ring_type& theRing);


protected:

  
};

///please use BooleEnv::ring()

END_NAMESPACE_PBORI

#endif // of #ifndef BooleEnv_h_