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.         */
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11   	/*                                                                           */
12   	/*      http://www.apache.org/licenses/LICENSE-2.0                           */
13   	/*                                                                           */
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15   	/*  distributed under the License is distributed on an "AS IS" BASIS,        */
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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