struct_primal.h

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/*         SCIP --- Solving Constraint Integer Programs                      */
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/**@file   struct_primal.h
 * @ingroup INTERNALAPI
 * @brief  datastructures for collecting primal CIP solutions and primal informations
 * @author Tobias Achterberg
 */
 
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
 
#ifndef __SCIP_STRUCT_PRIMAL_H__
#define __SCIP_STRUCT_PRIMAL_H__
 
 
#include "scip/def.h"
#include "scip/type_rational.h"
#include "scip/type_sol.h"
#include "scip/type_primal.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/** primal data and solution storage */
struct SCIP_Primal
{
   SCIP_Longint          nsolsfound;         /**< number of primal CIP solutions found up to now */
   SCIP_Longint          nlimsolsfound;      /**< number of primal CIP solutions respecting the objective limit found
                                              *   up to now */
   SCIP_Longint          nbestsolsfound;     /**< number of new best primal CIP solutions found up to now */
   SCIP_Longint          nlimbestsolsfound;  /**< number of new best primal CIP solutions respecting the objective limit
                                              *   found up to now */
   SCIP_Real             upperbound;         /**< upper (primal) bound of CIP: objective value of best solution or user bound */
   SCIP_RATIONAL*        upperboundexact;    /**< upper (primal) bound of CIP: objective value of best solution or user bound */
   SCIP_Real             cutoffbound;        /**< upper bound for better primal solutions (if objective value is always
                                              *   integral, cutoffbound is equal to ceil(upperbound) - 1.0 (+eps) */
   SCIP_RATIONAL*        cutoffboundexact;   /**< store the exact cutoff bound here, if in exact solving mode */
   SCIP_SOL**            sols;               /**< primal CIP solutions */
   SCIP_SOL**            partialsols;        /**< partial solutions */
   SCIP_SOL**            existingsols;       /**< all existing primal solutions (feasible, partial, and infeasible) */
   SCIP_SOL*             currentsol;         /**< internal solution for temporarily storing the current solution */
   SCIP_SOL*             primalray;          /**< solution representing the primal ray for (infeasible or) unbounded problems;
                                              *   warning: this does not have to be a feasible solution */
   int                   solssize;           /**< size of sols array */
   int                   partialsolssize;    /**< size of partialsols array */
   int                   nsols;              /**< number of primal CIP solutions stored in sols array */
   int                   npartialsols;       /**< number of partial solutions stored in partialsol array */
   int                   existingsolssize;   /**< size of existingsols array */
   int                   nexistingsols;      /**< number of primal CIP solutions stored in existingsols array */
 
   SCIP_Bool             updateviolations;   /**< marks whether the updating of violations is turned on */
};
 
#ifdef __cplusplus
}
#endif
 
#endif