library for probdata_lagr.cpp

src/probdata_lagr.h

+/**@file   PROBDATA_lagr.h
+ * @brief  Problem data for Lagrangian relaxation
+ * @author Dawit Hailu
+ * 
+ *
+ * This file handles the main problem data used in the Lagrangian relaxation.
+ */
+/*---+----1----+----2----+----3----+----4----+----d5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
+#ifndef __SCIP_PROBDATA_LAGR__
+#define __SCIP_PROBDATA_LAGR__
+
+#include "scip/scip.h"
+#include "vardata_lagr.h"
+
+
+/*classifying and storing the slot and start constraints in PROBDATA
+create probdata*/
+SCIP_RETCODE SCIPcreateprobdata(
+    SCIP* scip,
+    SCIP_ProbData** probdata
+    );
+
+
+/*get's the ids of the variables found in the slot constraints*/
+int* SCIPconsGetvarids(
+    SCIP_ProbData* probdata
+    );
+
+
+SCIP_CONS** SCIPgetSlotConss(
+SCIP_ProbData* probdata
+    );
+
+
+int SCIPgetNSlotConss(
+SCIP_ProbData* probdata
+    );
+
+/* here we create the probdata, which will be called for storage of values to the data*/
+SCIP_RETCODE probdataCreate(
+   SCIP*                 scip,               /**< SCIP data structure */
+   SCIP_PROBDATA**       probdata,           /**< pointer to problem data */
+   SCIP_CONS**          SlotConss,
+//    SCIP_CONS**          StartConss,
+   //SCIP_VAR**            vars,               /**< all exist variables */
+   //SCIP_CONS**           conss,              /**< set partitioning constraints for each job exactly one */
+   //int*                  varids,             /**< array of ids of variables in the slot constraints */
+   //int                   nconss,              /**< number of constraints */
+   int                   nSlotConss,          /**< number of slot constraints */
+int                      nStartConss
+   );
+
+
+SCIP_RETCODE probdataFree(
+   SCIP*                 scip,               /**< SCIP data structure */
+   SCIP_PROBDATA**       probdata
+   );
+
+SCIP_Real SCIPconsGetMultiplier(SCIP* scip,SCIP_CONS** cons,SCIP_Real subgradient,SCIP_Real C, SCIP_Real stepsize,SCIP_Bool firstiteration, SCIP_Real dualval);
+
+SCIP_Real SCIPgetSubgradients(
+   SCIP* relaxscip,
+   SCIP_CONS* cons,
+   SCIP_Real* solvals
+);
+
+
+SCIP_RETCODE SCIPsolveiteration(SCIP* scip,int nSlotConss,SCIP_Real** subgradients, SCIP_Real C, SCIP_Real* stepsize,SCIP_Real** bestsolvals,SCIP_Real* upperbound,int niter);
+
+SCIP_RETCODE SCIPgetFeasUpperbound(SCIP* scip,SCIP_Real** solvals, SCIP_Real** upperbound, SCIP_Real* solobj, int niter);
+#endif