sepastore.h

Go to the documentation of this file.

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/*  Copyright (c) 2002-2024 Zuse Institute Berlin (ZIB)                      */
/*                                                                           */
/*  Licensed under the Apache License, Version 2.0 (the "License");          */
/*  you may not use this file except in compliance with the License.         */
/*  You may obtain a copy of the License at                                  */
/*                                                                           */
/*      http://www.apache.org/licenses/LICENSE-2.0                           */
/*                                                                           */
/*  Unless required by applicable law or agreed to in writing, software      */
/*  distributed under the License is distributed on an "AS IS" BASIS,        */
/*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/*  See the License for the specific language governing permissions and      */
/*  limitations under the License.                                           */
/*                                                                           */
/*  You should have received a copy of the Apache-2.0 license                */
/*  along with SCIP; see the file LICENSE. If not visit scipopt.org.         */
/*                                                                           */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
/**@file   sepastore.h
 * @ingroup INTERNALAPI
 * @brief  internal methods for storing separated cuts
 * @author Tobias Achterberg
 * @author Leona Gottwald
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_SEPASTORE_H__
#define __SCIP_SEPASTORE_H__
 
 
#include "scip/def.h"
#include "blockmemshell/memory.h"
#include "scip/type_implics.h"
#include "scip/type_retcode.h"
#include "scip/type_set.h"
#include "scip/type_stat.h"
#include "scip/type_event.h"
#include "scip/type_lp.h"
#include "scip/type_prob.h"
#include "scip/type_tree.h"
#include "scip/type_reopt.h"
#include "scip/type_sepastore.h"
#include "scip/type_branch.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** creates separation storage */
SCIP_RETCODE SCIPsepastoreCreate(
   SCIP_SEPASTORE**      sepastore,          /**< pointer to store separation storage */
   BMS_BLKMEM*           blkmem,             /**< block memory */
   SCIP_SET*             set                 /**< global SCIP settings */
   );
 
/** frees separation storage */
SCIP_RETCODE SCIPsepastoreFree(
   SCIP_SEPASTORE**      sepastore,          /**< pointer to store separation storage */
   BMS_BLKMEM*           blkmem              /**< block memory */
   );
 
/** informs separation storage that the setup of the initial LP starts now */
void SCIPsepastoreStartInitialLP(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** informs separation storage that the setup of the initial LP is now finished */
void SCIPsepastoreEndInitialLP(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** informs separation storage that the following cuts should be used in any case */
void SCIPsepastoreStartForceCuts(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** informs separation storage that the following cuts should no longer be used in any case */
void SCIPsepastoreEndForceCuts(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** adds cut to separation storage and captures it */
SCIP_RETCODE SCIPsepastoreAddCut(
   SCIP_SEPASTORE*       sepastore,          /**< separation storage */
   BMS_BLKMEM*           blkmem,             /**< block memory */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics data */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_EVENTFILTER*     eventfilter,        /**< event filter for global events */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_ROW*             cut,                /**< separated cut */
   SCIP_Bool             forcecut,           /**< should the cut be forced to enter the LP? */
   SCIP_Bool             root,               /**< are we at the root node? */
   SCIP_Bool*            infeasible          /**< pointer to store whether the cut is infeasible */
   );
 
/** adds cuts to the LP and clears separation storage */
SCIP_RETCODE SCIPsepastoreApplyCuts(
   SCIP_SEPASTORE*       sepastore,          /**< separation storage */
   BMS_BLKMEM*           blkmem,             /**< block memory */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics */
   SCIP_PROB*            transprob,          /**< transformed problem */
   SCIP_PROB*            origprob,           /**< original problem */
   SCIP_TREE*            tree,               /**< branch and bound tree */
   SCIP_REOPT*           reopt,              /**< reoptimization data structure */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_BRANCHCAND*      branchcand,         /**< branching candidate storage */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_EVENTFILTER*     eventfilter,        /**< global event filter */
   SCIP_CLIQUETABLE*     cliquetable,        /**< clique table data structure */
   SCIP_Bool             root,               /**< are we at the root node? */
   SCIP_EFFICIACYCHOICE  efficiacychoice,    /**< type of solution to base efficiacy computation on */
   SCIP_Bool*            cutoff              /**< pointer to store whether an empty domain was created */
   );
 
/** clears the separation storage without adding the cuts to the LP */
SCIP_RETCODE SCIPsepastoreClearCuts(
   SCIP_SEPASTORE*       sepastore,          /**< separation storage */
   BMS_BLKMEM*           blkmem,             /**< block memory */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_EVENTFILTER*     eventfilter,        /**< event filter for global events */
   SCIP_LP*              lp                  /**< LP data */
   );
 
/** removes cuts that are inefficacious w.r.t. the current LP solution from separation storage without adding the cuts to the LP */
SCIP_RETCODE SCIPsepastoreRemoveInefficaciousCuts(
   SCIP_SEPASTORE*       sepastore,          /**< separation storage */
   BMS_BLKMEM*           blkmem,             /**< block memory */
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_STAT*            stat,               /**< problem statistics data */
   SCIP_EVENTQUEUE*      eventqueue,         /**< event queue */
   SCIP_EVENTFILTER*     eventfilter,        /**< event filter for global events */
   SCIP_LP*              lp,                 /**< LP data */
   SCIP_Bool             root,               /**< are we at the root node? */
   SCIP_EFFICIACYCHOICE  efficiacychoice     /**< type of solution to base efficiacy computation on */
   );
 
/** indicates whether a cut is applicable
 *
 *  A cut is applicable if it is modifiable, not a bound change, or a bound change that changes bounds by at least epsilon.
 */
SCIP_Bool SCIPsepastoreIsCutApplicable(
   SCIP_SET*             set,                /**< global SCIP settings */
   SCIP_ROW*             cut                 /**< cut to check */
   );
 
/** get cuts in the separation storage */
SCIP_ROW** SCIPsepastoreGetCuts(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** get number of cuts in the separation storage */
int SCIPsepastoreGetNCuts(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** gets the total number of cutting planes added to the separation storage;
 *  this is equal to the sum of added cuts directly and via the pool. */
int SCIPsepastoreGetNCutsAdded(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** gets the number of cutting planes added to the separation storage from the cut pool */
int SCIPsepastoreGetNCutsAddedViaPool(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** gets the number of cutting planes added to the separation storage directly */
int SCIPsepastoreGetNCutsAddedDirect(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** get number of cuts found so far in current separation round */
int SCIPsepastoreGetNCutsFoundRound(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
/** gets the total number of cutting planes applied to the LP */
int SCIPsepastoreGetNCutsApplied(
   SCIP_SEPASTORE*       sepastore           /**< separation storage */
   );
 
#ifdef __cplusplus
}
#endif
 
#endif