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2    	/*                                                                           */
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4    	/*         SCIP --- Solving Constraint Integer Programs                      */
5    	/*                                                                           */
6    	/*  Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB)                      */
7    	/*                                                                           */
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22   	/*                                                                           */
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24   	
25   	/**@file   struct_branch.h
26   	 * @ingroup INTERNALAPI
27   	 * @brief  datastructures for branching rules and branching candidate storage
28   	 * @author Tobias Achterberg
29   	 */
30   	
31   	/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
32   	
33   	#ifndef __SCIP_STRUCT_BRANCH_H__
34   	#define __SCIP_STRUCT_BRANCH_H__
35   	
36   	
37   	#include "scip/def.h"
38   	#include "scip/type_var.h"
39   	#include "scip/type_branch.h"
40   	
41   	#ifdef __cplusplus
42   	extern "C" {
43   	#endif
44   	
45   	/** branching candidate storage */
46   	struct SCIP_BranchCand
47   	{
48   	   SCIP_VAR**            lpcands;            /**< candidates for branching on LP solution (fractional integer variables) */
49   	   SCIP_Real*            lpcandssol;         /**< solution values of LP candidates */
50   	   SCIP_Real*            lpcandsfrac;        /**< fractionalities of LP candidates */
51   	   SCIP_VAR**            externcands;        /**< external candidates for branching, e.g. given by relaxation */
52   	   SCIP_Real*            externcandsscore;   /**< scores of external candidates, e.g. infeasibilities */
53   	   SCIP_Real*            externcandssol;     /**< values in solution of external candidates */
54   	   SCIP_VAR**            pseudocands;        /**< candidates for branching on pseudo solution (non-fixed integer variables) */
55   	   SCIP_Longint          validlpcandslp;     /**< lp number for which lpcands are valid */
56   	   int                   lpcandssize;        /**< number of available slots in lpcands array */
57   	   int                   nlpcands;           /**< number of candidates for branching on LP solution */
58   	   int                   npriolpcands;       /**< number of LP candidates with largest branch priority value */
59   	   int                   npriolpbins;        /**< number of binary LP candidates with largest branch priority value */
60   	   int                   nimpllpfracs;       /**< number of implicit variables with fractional LP solution value */
61   	   int                   lpmaxpriority;      /**< maximal branch priority of all LP candidates */
62   	   int                   externcandssize;    /**< number of available slots in externcands array */
63   	   int                   nexterncands;       /**< number of external candidates for branching */
64   	   int                   nprioexterncands;   /**< number of external candidates with largest branch priority value */
65   	   int                   nprioexternbins;    /**< number of binary external candidates with largest branch priority value */
66   	   int                   nprioexternints;    /**< number of integer external candidates with largest branch priority value */
67   	   int                   nprioexternimpls;   /**< number of implicit integer external candidates with largest branch priority value */
68   	   int                   externmaxpriority;  /**< maximal branch priority of all external candidates */
69   	   int                   pseudocandssize;    /**< number of available slots in pseudocands array */
70   	   int                   npseudocands;       /**< number of candidates for branching on pseudo solution */
71   	   int                   npriopseudocands;   /**< number of pseudo candidates with largest branch priority value */
72   	   int                   npriopseudobins;    /**< number of binary pseudo candidates with largest branch priority value */
73   	   int                   npriopseudoints;    /**< number of integer pseudo candidates with largest branch priority value */
74   	   int                   pseudomaxpriority;  /**< maximal branch priority of all pseudo candidates */
75   	};
76   	
77   	/** branching rule */
78   	struct SCIP_Branchrule
79   	{
80   	   SCIP_Real             maxbounddist;       /**< maximal relative distance from current node's dual bound to primal bound
81   	                                              *   compared to best node's dual bound for applying branching rule
82   	                                              *   (0.0: only on current best node, 1.0: on all nodes) */
83   	   SCIP_Longint          nlpcalls;           /**< number of times, this branching rule was called on an LP solution */
84   	   SCIP_Longint          nexterncalls;       /**< number of times, this branching rule was called on external candidates */
85   	   SCIP_Longint          npseudocalls;       /**< number of times, this branching rule was called on a pseudo solution */
86   	   SCIP_Longint          ncutoffs;           /**< number of cutoffs found so far by this branching rule */
87   	   SCIP_Longint          ncutsfound;         /**< number of cutting planes found so far by this branching rule */
88   	   SCIP_Longint          nconssfound;        /**< number of cutting constraints added so far by this branching rule (not
89   	                                              *   counting constraint additions to child nodes used for branching) */
90   	   SCIP_Longint          ndomredsfound;      /**< number of domain reductions found so far by this branching rule */
91   	   SCIP_Longint          nchildren;          /**< number of children created so far by this branching rule */
92   	   char*                 name;               /**< name of branching rule */
93   	   char*                 desc;               /**< description of branching rule */
94   	   SCIP_DECL_BRANCHCOPY  ((*branchcopy));    /**< copy method of branching rule or NULL if you don't want to copy your plugin into sub-SCIPs */
95   	   SCIP_DECL_BRANCHFREE  ((*branchfree));    /**< destructor of branching rule */
96   	   SCIP_DECL_BRANCHINIT  ((*branchinit));    /**< initialize branching rule */
97   	   SCIP_DECL_BRANCHEXIT  ((*branchexit));    /**< deinitialize branching rule */
98   	   SCIP_DECL_BRANCHINITSOL((*branchinitsol));/**< solving process initialization method of branching rule */
99   	   SCIP_DECL_BRANCHEXITSOL((*branchexitsol));/**< solving process deinitialization method of branching rule */
100  	   SCIP_DECL_BRANCHEXECLP((*branchexeclp));  /**< branching execution method for fractional LP solutions */
101  	   SCIP_DECL_BRANCHEXECEXT((*branchexecext));/**< branching execution method for external candidates */
102  	   SCIP_DECL_BRANCHEXECPS((*branchexecps));  /**< branching execution method for not completely fixed pseudo solutions */
103  	   SCIP_BRANCHRULEDATA*  branchruledata;     /**< branching rule data */
104  	   SCIP_CLOCK*           setuptime;          /**< time spend for setting up this branchrule for the next stages */
105  	   SCIP_CLOCK*           branchclock;        /**< branching rule execution time */
106  	   int                   priority;           /**< priority of the branching rule */
107  	   int                   maxdepth;           /**< maximal depth level, up to which this branching rule should be used (or -1) */
108  	   SCIP_Bool             initialized;        /**< is branching rule initialized? */
109  	   SCIP_Bool             isobjbranchrule;    /**< is branching rule an obj branching rule? */
110  	};
111  	
112  	#ifdef __cplusplus
113  	}
114  	#endif
115  	
116  	#endif
117