1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 2 /* */ 3 /* This file is part of the program and library */ 4 /* SCIP --- Solving Constraint Integer Programs */ 5 /* */ 6 /* Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB) */ 7 /* */ 8 /* Licensed under the Apache License, Version 2.0 (the "License"); */ 9 /* you may not use this file except in compliance with the License. */ 10 /* You may obtain a copy of the License at */ 11 /* */ 12 /* http://www.apache.org/licenses/LICENSE-2.0 */ 13 /* */ 14 /* Unless required by applicable law or agreed to in writing, software */ 15 /* distributed under the License is distributed on an "AS IS" BASIS, */ 16 /* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */ 17 /* See the License for the specific language governing permissions and */ 18 /* limitations under the License. */ 19 /* */ 20 /* You should have received a copy of the Apache-2.0 license */ 21 /* along with SCIP; see the file LICENSE. If not visit scipopt.org. */ 22 /* */ 23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 24 25 /**@file struct_presol.h 26 * @ingroup INTERNALAPI 27 * @brief datastructures for presolvers 28 * @author Tobias Achterberg 29 */ 30 31 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 32 33 #ifndef __SCIP_STRUCT_PRESOL_H__ 34 #define __SCIP_STRUCT_PRESOL_H__ 35 36 37 #include "scip/def.h" 38 #include "scip/type_clock.h" 39 #include "scip/type_presol.h" 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /** presolver */ 46 struct SCIP_Presol 47 { 48 char* name; /**< name of presolver */ 49 char* desc; /**< description of presolver */ 50 SCIP_DECL_PRESOLCOPY ((*presolcopy)); /**< copy method of presolver or NULL if you don't want to copy your plugin into sub-SCIPs */ 51 SCIP_DECL_PRESOLFREE ((*presolfree)); /**< destructor of presolver to free user data (called when SCIP is exiting) */ 52 SCIP_DECL_PRESOLINIT ((*presolinit)); /**< initialization method of presolver (called after problem was transformed) */ 53 SCIP_DECL_PRESOLEXIT ((*presolexit)); /**< deinitialization method of presolver (called before transformed problem is freed) */ 54 SCIP_DECL_PRESOLINITPRE((*presolinitpre));/**< presolving initialization method of presolver (called when presolving is about to begin) */ 55 SCIP_DECL_PRESOLEXITPRE((*presolexitpre));/**< presolving deinitialization method of presolver (called after presolving has been finished) */ 56 SCIP_DECL_PRESOLEXEC ((*presolexec)); /**< execution method of presolver */ 57 SCIP_PRESOLDATA* presoldata; /**< presolver data */ 58 SCIP_CLOCK* setuptime; /**< time spend for setting up this presolver for the next stages */ 59 SCIP_CLOCK* presolclock; /**< presolving time */ 60 int priority; /**< priority of the presolver */ 61 int maxrounds; /**< maximal number of presolving rounds the presolver participates in (-1: no limit) */ 62 int lastnfixedvars; /**< number of variables fixed before the last call to the presolver */ 63 int lastnaggrvars; /**< number of variables aggregated before the last call to the presolver */ 64 int lastnchgvartypes; /**< number of variable type changes before the last call to the presolver */ 65 int lastnchgbds; /**< number of variable bounds tightened before the last call to the presolver */ 66 int lastnaddholes; /**< number of domain holes added before the last call to the presolver */ 67 int lastndelconss; /**< number of deleted constraints before the last call to the presolver */ 68 int lastnaddconss; /**< number of added constraints before the last call to the presolver */ 69 int lastnupgdconss; /**< number of upgraded constraints before the last call to the presolver */ 70 int lastnchgcoefs; /**< number of changed coefficients before the last call to the presolver */ 71 int lastnchgsides; /**< number of changed left or right hand sides before the last call */ 72 int nfixedvars; /**< total number of variables fixed by this presolver */ 73 int naggrvars; /**< total number of variables aggregated by this presolver */ 74 int nchgvartypes; /**< total number of variable type changes by this presolver */ 75 int nchgbds; /**< total number of variable bounds tightened by this presolver */ 76 int naddholes; /**< total number of domain holes added by this presolver */ 77 int ndelconss; /**< total number of deleted constraints by this presolver */ 78 int naddconss; /**< total number of added constraints by this presolver */ 79 int nupgdconss; /**< total number of upgraded constraints by this presolver */ 80 int nchgcoefs; /**< total number of changed coefficients by this presolver */ 81 int nchgsides; /**< total number of changed left or right hand sides by this presolver */ 82 int ncalls; /**< number of times the presolver was called and tried to find reductions */ 83 SCIP_Bool initialized; /**< is presolver initialized? */ 84 SCIP_PRESOLTIMING timing; /**< timing of the presolver */ 85 }; 86 87 #ifdef __cplusplus 88 } 89 #endif 90 91 #endif 92