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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* */
/* This file is part of the program */
/* GCG --- Generic Column Generation */
/* a Dantzig-Wolfe decomposition based extension */
/* of the branch-cut-and-price framework */
/* SCIP --- Solving Constraint Integer Programs */
/* */
/* Copyright (C) 2010-2022 Operations Research, RWTH Aachen University */
/* Zuse Institute Berlin (ZIB) */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU Lesser General Public License */
/* as published by the Free Software Foundation; either version 3 */
/* 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 Lesser General Public License for more details. */
/* */
/* You should have received a copy of the GNU Lesser General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.*/
/* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**@file struct_pricingprob.h
* @ingroup DATASTRUCTURES
* @brief data structure to store pricing problem information
* @author Christian Puchert
*/
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
#ifndef GCG_STRUCT_PRICINGPROB_H_
#define GCG_STRUCT_PRICINGPROB_H_
#include "scip/def.h"
#include "scip/type_misc.h"
#include "scip/scip.h"
#include "type_pricingprob.h"
#include "type_gcgcol.h"
#include "type_solver.h"
#ifdef __cplusplus
extern "C" {
#endif
/** pricing problem data structure */
struct GCG_PricingProb
{
/* problem data */
SCIP* pricingscip; /**< SCIP data structure */
int probnr; /**< (block) index of the corresponding pricing problem */
/* generic branching information */
SCIP_CONS** branchconss; /**< stack of generic branching constraints */
SCIP_Real* branchduals; /**< corresponding dual solution values */
int nbranchconss; /**< number of generic branching constraints */
int branchconsssize; /**< size of generic branching constraints array */
int branchconsidx; /**< lowest index generic branching constraint that is considered */
SCIP_Bool consisadded; /**< flag to indicate whether this constraint has already been added */
/* result values */
GCG_PRICINGSTATUS status; /**< current status of the pricing problem */
SCIP_Real lowerbound; /**< lower bound obtained by solving the pricing problem */
int nimpcols; /**< number of improving columns found in the current pricing round */
/* statistics */
int nsolves; /**< number of times the pricing problem was solved during the loop */
int* ncolsround; /**< number of improving columns found in the last rounds */
int maxcolsround; /**< capacity of ncolsround */
};
#ifdef __cplusplus
}
#endif
#endif /* STRUCT_PRICINGPROB_H_ */