scip_datastructures.h

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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*                                                                           */
/*                  This file is part of the program and library             */
/*         SCIP --- Solving Constraint Integer Programs                      */
/*                                                                           */
/*    Copyright (C) 2002-2021 Konrad-Zuse-Zentrum                            */
/*                            fuer Informationstechnik Berlin                */
/*                                                                           */
/*  SCIP is distributed under the terms of the ZIB Academic License.         */
/*                                                                           */
/*  You should have received a copy of the ZIB Academic License              */
/*  along with SCIP; see the file COPYING. If not visit scipopt.org.         */
/*                                                                           */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

/**@file   scip_datastructures.h
 * @ingroup PUBLICCOREAPI
 * @brief  public methods for data structures
 * @author Tobias Achterberg
 * @author Timo Berthold
 * @author Thorsten Koch
 * @author Alexander Martin
 * @author Marc Pfetsch
 * @author Kati Wolter
 * @author Gregor Hendel
 * @author Leona Gottwald
 */

/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/

#ifndef __SCIP_SCIP_DATASTRUCTURES_H__
#define __SCIP_SCIP_DATASTRUCTURES_H__


#include "scip/def.h"
#include "scip/type_misc.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"

#ifdef __cplusplus
extern "C" {
#endif

/**@addtogroup PublicDynamicArrayMethods
 *
 * @{
 */

/** creates a dynamic array of real values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateRealarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY**      realarray           /**< pointer to store the real array */
   );

/** frees a dynamic array of real values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPfreeRealarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY**      realarray           /**< pointer to the real array */
   );

/** extends dynamic array to be able to store indices from minidx to maxidx
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPextendRealarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray,          /**< dynamic real array */
   int                   minidx,             /**< smallest index to allocate storage for */
   int                   maxidx              /**< largest index to allocate storage for */
   );

/** clears a dynamic real array
 *
 *  @return clears a dynamic real array
 */
SCIP_EXPORT
SCIP_RETCODE SCIPclearRealarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray           /**< dynamic real array */
   );

/** gets value of entry in dynamic array */
SCIP_EXPORT
SCIP_Real SCIPgetRealarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray,          /**< dynamic real array */
   int                   idx                 /**< array index to get value for */
   );

/** sets value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPsetRealarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray,          /**< dynamic real array */
   int                   idx,                /**< array index to set value for */
   SCIP_Real             val                 /**< value to set array index to */
   );

/** increases value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPincRealarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray,          /**< dynamic real array */
   int                   idx,                /**< array index to increase value for */
   SCIP_Real             incval              /**< value to increase array index */
   );

/** returns the minimal index of all stored non-zero elements
 *
 *  @return the minimal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetRealarrayMinIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray           /**< dynamic real array */
   );

/** returns the maximal index of all stored non-zero elements
 *
 *  @return the maximal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetRealarrayMaxIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_REALARRAY*       realarray           /**< dynamic real array */
   );

/** creates a dynamic array of int values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateIntarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY**       intarray            /**< pointer to store the int array */
   );

/** frees a dynamic array of int values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPfreeIntarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY**       intarray            /**< pointer to the int array */
   );

/** extends dynamic array to be able to store indices from minidx to maxidx
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPextendIntarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray,           /**< dynamic int array */
   int                   minidx,             /**< smallest index to allocate storage for */
   int                   maxidx              /**< largest index to allocate storage for */
   );

/** clears a dynamic int array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPclearIntarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray            /**< dynamic int array */
   );

/** gets value of entry in dynamic array
 *
 *  @return value of entry in dynamic array
 */
SCIP_EXPORT
int SCIPgetIntarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray,           /**< dynamic int array */
   int                   idx                 /**< array index to get value for */
   );

/** sets value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPsetIntarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray,           /**< dynamic int array */
   int                   idx,                /**< array index to set value for */
   int                   val                 /**< value to set array index to */
   );

/** increases value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPincIntarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray,           /**< dynamic int array */
   int                   idx,                /**< array index to increase value for */
   int                   incval              /**< value to increase array index */
   );

/** returns the minimal index of all stored non-zero elements
 *
 *  @return the minimal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetIntarrayMinIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray            /**< dynamic int array */
   );

/** returns the maximal index of all stored non-zero elements
 *
 *  @return the maximal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetIntarrayMaxIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_INTARRAY*        intarray            /**< dynamic int array */
   );

/** creates a dynamic array of bool values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateBoolarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY**      boolarray           /**< pointer to store the bool array */
   );

/** frees a dynamic array of bool values
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPfreeBoolarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY**      boolarray           /**< pointer to the bool array */
   );

/** extends dynamic array to be able to store indices from minidx to maxidx
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPextendBoolarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray,          /**< dynamic bool array */
   int                   minidx,             /**< smallest index to allocate storage for */
   int                   maxidx              /**< largest index to allocate storage for */
   );

/** clears a dynamic bool array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPclearBoolarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray           /**< dynamic bool array */
   );

/** gets value of entry in dynamic array
 *
 *  @return value of entry in dynamic array at position idx
 */
SCIP_EXPORT
SCIP_Bool SCIPgetBoolarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray,          /**< dynamic bool array */
   int                   idx                 /**< array index to get value for */
   );

/** sets value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPsetBoolarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray,          /**< dynamic bool array */
   int                   idx,                /**< array index to set value for */
   SCIP_Bool             val                 /**< value to set array index to */
   );

/** returns the minimal index of all stored non-zero elements
 *
 *  @return the minimal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetBoolarrayMinIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray           /**< dynamic bool array */
   );

/** returns the maximal index of all stored non-zero elements
 *
 *  @return the maximal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetBoolarrayMaxIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_BOOLARRAY*       boolarray           /**< dynamic bool array */
   );

/** creates a dynamic array of pointers
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcreatePtrarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY**       ptrarray            /**< pointer to store the int array */
   );

/** frees a dynamic array of pointers
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPfreePtrarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY**       ptrarray            /**< pointer to the int array */
   );

/** extends dynamic array to be able to store indices from minidx to maxidx
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPextendPtrarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray,           /**< dynamic int array */
   int                   minidx,             /**< smallest index to allocate storage for */
   int                   maxidx              /**< largest index to allocate storage for */
   );

/** clears a dynamic pointer array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPclearPtrarray(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray            /**< dynamic int array */
   );

/** gets value of entry in dynamic array */
SCIP_EXPORT
void* SCIPgetPtrarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray,           /**< dynamic int array */
   int                   idx                 /**< array index to get value for */
   );

/** sets value of entry in dynamic array
 *
 *  @return \ref SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See \ref
 *          SCIP_Retcode "SCIP_RETCODE" for a complete list of error codes.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPsetPtrarrayVal(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray,           /**< dynamic int array */
   int                   idx,                /**< array index to set value for */
   void*                 val                 /**< value to set array index to */
   );

/** returns the minimal index of all stored non-zero elements
 *
 *  @return the minimal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetPtrarrayMinIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray            /**< dynamic ptr array */
   );

/** returns the maximal index of all stored non-zero elements
 *
 *  @return the maximal index of all stored non-zero elements
 */
SCIP_EXPORT
int SCIPgetPtrarrayMaxIdx(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_PTRARRAY*        ptrarray            /**< dynamic ptr array */
   );

/**@} */

/**@addtogroup DisjointSet
 *
 * @{
 */

/** creates a disjoint set (union find) structure \p djset for \p ncomponents many components (of size one) */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateDisjointset(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DISJOINTSET**    djset,              /**< disjoint set (union find) data structure */
   int                   ncomponents         /**< number of components */
   );

/** frees the disjoint set (union find) data structure */
SCIP_EXPORT
void SCIPfreeDisjointset(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DISJOINTSET**    djset               /**< pointer to disjoint set (union find) data structure */
   );

/** @} */

/**@addtogroup DirectedGraph
 *
 * @{
 */

/** creates directed graph structure */
SCIP_EXPORT
SCIP_RETCODE SCIPcreateDigraph(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIGRAPH**        digraph,            /**< pointer to store the created directed graph */
   int                   nnodes              /**< number of nodes */
   );

/**! [SnippetCodeStyleComment] */

/** copies directed graph structure
 *
 *  The copying procedure uses the memory of the passed SCIP instance. The user must ensure that the digraph lives
 *  as most as long as the SCIP instance.
 *
 *  @note The data in nodedata is copied verbatim. This possibly has to be adapted by the user.
 */
SCIP_EXPORT
SCIP_RETCODE SCIPcopyDigraph(
   SCIP*                 scip,               /**< SCIP data structure */
   SCIP_DIGRAPH**        targetdigraph,      /**< pointer to store the copied directed graph */
   SCIP_DIGRAPH*         sourcedigraph       /**< source directed graph */
   );

/**! [SnippetCodeStyleComment] */
/**@} */

#ifdef __cplusplus
}
#endif

#endif