prop_symmetry.h

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/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
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/**@file   prop_symmetry.h
 * @ingroup PROPAGATORS
 * @brief  propagator for symmetry handling
 * @author Marc Pfetsch
 * @author Thomas Rehn
 * @author Christopher Hojny
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_PROP_SYMMETRY_H_
#define __SCIP_PROP_SYMMETRY_H_
 
#include "scip/scip.h"
#include "symmetry/type_symmetry.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** include symmetry propagator */
SCIP_EXPORT
SCIP_RETCODE SCIPincludePropSymmetry(
   SCIP*                 scip                /**< SCIP data structure */
   );
 
/** return currently available symmetry group information */
SCIP_EXPORT
SCIP_RETCODE SCIPgetSymmetry(
   SCIP*                 scip,               /**< SCIP data structure */
   int*                  npermvars,          /**< pointer to store number of variables for permutations */
   SCIP_VAR***           permvars,           /**< pointer to store variables on which permutations act */
   SCIP_HASHMAP**        permvarmap,         /**< pointer to store hash map of permvars (or NULL) */
   int*                  nperms,             /**< pointer to store number of permutations */
   int***                perms,              /**< pointer to store permutation generators as (nperms x npermvars) matrix (or NULL)*/
   int***                permstrans,         /**< pointer to store permutation generators as (npermvars x nperms) matrix (or NULL)*/
   SCIP_Real*            log10groupsize,     /**< pointer to store log10 of group size (or NULL) */
   SCIP_Bool*            binvaraffected,     /**< pointer to store whether binary variables are affected */
   int**                 components,         /**< pointer to store components of symmetry group (or NULL) */
   int**                 componentbegins,    /**< pointer to store begin positions of components in components array (or NULL) */
   int**                 vartocomponent,     /**< pointer to store assignment from variable to its component (or NULL) */
   int*                  ncomponents         /**< pointer to store number of components (or NULL) */
   );
 
/** return number of the symmetry group's generators */
SCIP_EXPORT
int SCIPgetSymmetryNGenerators(
   SCIP*                 scip                /**< SCIP data structure */
   );
 
/** displays generators of symmetry group, if available */
SCIP_EXPORT
SCIP_RETCODE SCIPdisplaySymmetryGenerators(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PROP*            prop                /**< symmetry propagator or NULL */
   );
 
/** creates new operator node type (used for symmetry detection) and returns its representation
 *
 *  If the operator node already exists, the function terminates with SCIP_INVALIDDATA.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateSymOpNodeType(
   SCIP*                 scip,               /**< SCIP pointer */
   const char*           opnodename,         /**< name of new operator node type */
   int*                  nodetype            /**< pointer to store the new node type */
   );
 
/** returns representation of an operator node type.
 *
 *  If the node type does not already exist, a new node type will be created.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPgetSymOpNodeType(
   SCIP*                 scip,               /**< SCIP pointer */
   const char*           opnodename,         /**< name of new operator node type */
   int*                  nodetype            /**< pointer to store the node type */
   );
 
#ifdef __cplusplus
}
#endif
 
#endif