PivotStrategy.h

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/* Frobby: Software for monomial ideal computations.
   Copyright (C) 2011 Bjarke Hammersholt Roune (www.broune.com)
 
   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, see http://www.gnu.org/licenses/.
*/
#ifndef PIVOT_EULER_STRATEGY_GUARD
#define PIVOT_EULER_STRATEGY_GUARD
 
#include <vector>
#include <ostream>
#include <string>
 
class EulerState;
class PivotEulerAlg;

class PivotStrategy {
public:
  virtual ~PivotStrategy() {}

  virtual EulerState* doPivot(EulerState& state, const size_t* divCounts) = 0;

  virtual void getName(ostream& out) const = 0;

  virtual void computationCompleted(const PivotEulerAlg& alg) = 0;

  virtual bool shouldTranspose(const EulerState& state) const = 0;
 
 protected:
  PivotStrategy() {}
 
 private:
  PivotStrategy(const PivotStrategy&); // not available
  void operator=(const PivotStrategy&); // not available
};
 
unique_ptr<PivotStrategy> newDefaultPivotStrategy();
 
unique_ptr<PivotStrategy> newStdPivotStrategy(const string& name);
unique_ptr<PivotStrategy> newGenPivotStrategy(const string& name);
unique_ptr<PivotStrategy> newHybridPivotStrategy
  (unique_ptr<PivotStrategy> stdStrat, unique_ptr<PivotStrategy> genStrat);
unique_ptr<PivotStrategy> newDebugPivotStrategy(unique_ptr<PivotStrategy> strat,
                                              FILE* out);
unique_ptr<PivotStrategy> newStatisticsPivotStrategy
(unique_ptr<PivotStrategy> strat, FILE* out);
 
#endif