Scippy

SCIP

Solving Constraint Integer Programs

objbranchrule.cpp
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4 /* SCIP --- Solving Constraint Integer Programs */
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24 
25 /**@file objbranchrule.cpp
26  * @brief C++ wrapper for branching rules
27  * @author Tobias Achterberg
28  */
29 
30 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
31 
32 #include <cassert>
33 
34 #include "objbranchrule.h"
35 
36 
37 
38 
39 /*
40  * Data structures
41  */
42 
43 /** branching rule data */
44 struct SCIP_BranchruleData
45 {
46  scip::ObjBranchrule* objbranchrule; /**< branching rule object */
47  SCIP_Bool deleteobject; /**< should the branching rule object be deleted when branching rule is freed? */
48 };
49 
50 
51 
52 
53 /*
54  * Callback methods of branching rule
55  */
56 
57 extern "C"
58 {
59 
60 /** copy method for branchrule plugins (called when SCIP copies plugins) */
61 static
62 SCIP_DECL_BRANCHCOPY(branchCopyObj)
63 { /*lint --e{715}*/
64  SCIP_BRANCHRULEDATA* branchruledata;
65 
66  assert(scip != NULL);
67 
68  branchruledata = SCIPbranchruleGetData(branchrule);
69  assert(branchruledata != NULL);
70  assert(branchruledata->objbranchrule != NULL);
71  assert(branchruledata->objbranchrule->scip_ != scip);
72 
73  if( branchruledata->objbranchrule->iscloneable() )
74  {
75  scip::ObjBranchrule* newobjbranchrule;
76  newobjbranchrule = dynamic_cast<scip::ObjBranchrule*> (branchruledata->objbranchrule->clone(scip));
77 
78  /* call include method of branchrule object */
79  SCIP_CALL( SCIPincludeObjBranchrule(scip, newobjbranchrule, TRUE) );
80  }
81 
82  return SCIP_OKAY;
83 }
84 
85 /** destructor of branching rule to free user data (called when SCIP is exiting) */
86 static
87 SCIP_DECL_BRANCHFREE(branchFreeObj)
88 { /*lint --e{715}*/
89  SCIP_BRANCHRULEDATA* branchruledata;
90 
91  branchruledata = SCIPbranchruleGetData(branchrule);
92  assert(branchruledata != NULL);
93  assert(branchruledata->objbranchrule != NULL);
94  assert(branchruledata->objbranchrule->scip_ == scip);
95 
96  /* call virtual method of branchrule object */
97  SCIP_CALL( branchruledata->objbranchrule->scip_free(scip, branchrule) );
98 
99  /* free branchrule object */
100  if( branchruledata->deleteobject )
101  delete branchruledata->objbranchrule;
102 
103  /* free branchrule data */
104  delete branchruledata;
105  SCIPbranchruleSetData(branchrule, NULL); /*lint !e64*/
106 
107  return SCIP_OKAY;
108 }
109 
110 
111 /** initialization method of branching rule (called after problem was transformed) */
112 static
113 SCIP_DECL_BRANCHINIT(branchInitObj)
114 { /*lint --e{715}*/
115  SCIP_BRANCHRULEDATA* branchruledata;
116 
117  branchruledata = SCIPbranchruleGetData(branchrule);
118  assert(branchruledata != NULL);
119  assert(branchruledata->objbranchrule != NULL);
120  assert(branchruledata->objbranchrule->scip_ == scip);
121 
122  /* call virtual method of branchrule object */
123  SCIP_CALL( branchruledata->objbranchrule->scip_init(scip, branchrule) );
124 
125  return SCIP_OKAY;
126 }
127 
128 
129 /** deinitialization method of branching rule (called before transformed problem is freed) */
130 static
131 SCIP_DECL_BRANCHEXIT(branchExitObj)
132 { /*lint --e{715}*/
133  SCIP_BRANCHRULEDATA* branchruledata;
134 
135  branchruledata = SCIPbranchruleGetData(branchrule);
136  assert(branchruledata != NULL);
137  assert(branchruledata->objbranchrule != NULL);
138 
139  /* call virtual method of branchrule object */
140  SCIP_CALL( branchruledata->objbranchrule->scip_exit(scip, branchrule) );
141 
142  return SCIP_OKAY;
143 }
144 
145 
146 /** solving process initialization method of branching rule (called when branch and bound process is about to begin) */
147 static
148 SCIP_DECL_BRANCHINITSOL(branchInitsolObj)
149 { /*lint --e{715}*/
150  SCIP_BRANCHRULEDATA* branchruledata;
151 
152  branchruledata = SCIPbranchruleGetData(branchrule);
153  assert(branchruledata != NULL);
154  assert(branchruledata->objbranchrule != NULL);
155 
156  /* call virtual method of branchrule object */
157  SCIP_CALL( branchruledata->objbranchrule->scip_initsol(scip, branchrule) );
158 
159  return SCIP_OKAY;
160 }
161 
162 
163 /** solving process deinitialization method of branching rule (called before branch and bound process data is freed) */
164 static
165 SCIP_DECL_BRANCHEXITSOL(branchExitsolObj)
166 { /*lint --e{715}*/
167  SCIP_BRANCHRULEDATA* branchruledata;
168 
169  branchruledata = SCIPbranchruleGetData(branchrule);
170  assert(branchruledata != NULL);
171  assert(branchruledata->objbranchrule != NULL);
172 
173  /* call virtual method of branchrule object */
174  SCIP_CALL( branchruledata->objbranchrule->scip_exitsol(scip, branchrule) );
175 
176  return SCIP_OKAY;
177 }
178 
179 
180 /** branching execution method for fractional LP solutions */
181 static
182 SCIP_DECL_BRANCHEXECLP(branchExeclpObj)
183 { /*lint --e{715}*/
184  SCIP_BRANCHRULEDATA* branchruledata;
185 
186  branchruledata = SCIPbranchruleGetData(branchrule);
187  assert(branchruledata != NULL);
188  assert(branchruledata->objbranchrule != NULL);
189 
190  /* call virtual method of branchrule object */
191  SCIP_CALL( branchruledata->objbranchrule->scip_execlp(scip, branchrule, allowaddcons, result) );
192 
193  return SCIP_OKAY;
194 }
195 
196 
197 /** branching execution method for external candidates */
198 static
199 SCIP_DECL_BRANCHEXECEXT(branchExecextObj)
200 { /*lint --e{715}*/
201  SCIP_BRANCHRULEDATA* branchruledata;
202 
203  branchruledata = SCIPbranchruleGetData(branchrule);
204  assert(branchruledata != NULL);
205  assert(branchruledata->objbranchrule != NULL);
206 
207  /* call virtual method of branchrule object */
208  SCIP_CALL( branchruledata->objbranchrule->scip_execext(scip, branchrule, allowaddcons, result) );
209 
210  return SCIP_OKAY;
211 }
212 
213 
214 /** branching execution method for not completely fixed pseudo solutions */
215 static
216 SCIP_DECL_BRANCHEXECPS(branchExecpsObj)
217 { /*lint --e{715}*/
218  SCIP_BRANCHRULEDATA* branchruledata;
219 
220  branchruledata = SCIPbranchruleGetData(branchrule);
221  assert(branchruledata != NULL);
222  assert(branchruledata->objbranchrule != NULL);
223 
224  /* call virtual method of branchrule object */
225  SCIP_CALL( branchruledata->objbranchrule->scip_execps(scip, branchrule, allowaddcons, result) );
226 
227  return SCIP_OKAY;
228 }
229 }
230 
231 
232 
233 /*
234  * branching rule specific interface methods
235  */
236 
237 /** creates the branching rule for the given branching rule object and includes it in SCIP */
239  SCIP* scip, /**< SCIP data structure */
240  scip::ObjBranchrule* objbranchrule, /**< branching rule object */
241  SCIP_Bool deleteobject /**< should the branching rule object be deleted when branching rule is freed? */
242  )
243 {
244  SCIP_BRANCHRULEDATA* branchruledata;
245 
246  assert(scip != NULL);
247  assert(objbranchrule != NULL);
248 
249  /* create branching rule data */
250  branchruledata = new SCIP_BRANCHRULEDATA;
251  branchruledata->objbranchrule = objbranchrule;
252  branchruledata->deleteobject = deleteobject;
253 
254  /* include branching rule */
255  SCIP_CALL( SCIPincludeBranchrule(scip, objbranchrule->scip_name_, objbranchrule->scip_desc_,
256  objbranchrule->scip_priority_, objbranchrule->scip_maxdepth_, objbranchrule->scip_maxbounddist_,
257  branchCopyObj,
258  branchFreeObj, branchInitObj, branchExitObj, branchInitsolObj, branchExitsolObj,
259  branchExeclpObj, branchExecextObj, branchExecpsObj,
260  branchruledata) ); /*lint !e429*/
261 
262  return SCIP_OKAY; /*lint !e429*/
263 }
264 
265 
266 /** returns the branchrule object of the given name, or 0 if not existing */
268  SCIP* scip, /**< SCIP data structure */
269  const char* name /**< name of branching rule */
270  )
271 {
272  SCIP_BRANCHRULE* branchrule;
273  SCIP_BRANCHRULEDATA* branchruledata;
274 
275  branchrule = SCIPfindBranchrule(scip, name);
276  if( branchrule == NULL )
277  return 0;
278 
279  branchruledata = SCIPbranchruleGetData(branchrule);
280  assert(branchruledata != NULL);
281 
282  return branchruledata->objbranchrule;
283 }
284 
285 /** returns the branchrule object for the given branching rule */
287  SCIP* scip, /**< SCIP data structure */
288  SCIP_BRANCHRULE* branchrule /**< branching rule */
289  )
290 {
291  SCIP_BRANCHRULEDATA* branchruledata;
292 
293  assert(scip != NULL);
294  branchruledata = SCIPbranchruleGetData(branchrule);
295  assert(branchruledata != NULL);
296 
297  return branchruledata->objbranchrule;
298 }
SCIP_BRANCHRULEDATA * SCIPbranchruleGetData(SCIP_BRANCHRULE *branchrule)
Definition: branch.c:1849
SCIP_RETCODE SCIPincludeBranchrule(SCIP *scip, const char *name, const char *desc, int priority, int maxdepth, SCIP_Real maxbounddist, SCIP_DECL_BRANCHCOPY((*branchcopy)), SCIP_DECL_BRANCHFREE((*branchfree)), SCIP_DECL_BRANCHINIT((*branchinit)), SCIP_DECL_BRANCHEXIT((*branchexit)), SCIP_DECL_BRANCHINITSOL((*branchinitsol)), SCIP_DECL_BRANCHEXITSOL((*branchexitsol)), SCIP_DECL_BRANCHEXECLP((*branchexeclp)), SCIP_DECL_BRANCHEXECEXT((*branchexecext)), SCIP_DECL_BRANCHEXECPS((*branchexecps)), SCIP_BRANCHRULEDATA *branchruledata)
Definition: scip_branch.c:68
static SCIP_DECL_BRANCHINIT(branchInitObj)
struct SCIP_BranchruleData SCIP_BRANCHRULEDATA
Definition: type_branch.h:57
#define TRUE
Definition: def.h:95
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
SCIP_BRANCHRULE * SCIPfindBranchrule(SCIP *scip, const char *name)
Definition: scip_branch.c:297
static SCIP_DECL_BRANCHEXECLP(branchExeclpObj)
static SCIP_DECL_BRANCHEXITSOL(branchExitsolObj)
static SCIP_DECL_BRANCHEXECEXT(branchExecextObj)
const int scip_priority_
Definition: objbranchrule.h:69
static SCIP_DECL_BRANCHFREE(branchFreeObj)
static SCIP_DECL_BRANCHEXIT(branchExitObj)
static SCIP_DECL_BRANCHEXECPS(branchExecpsObj)
#define NULL
Definition: lpi_spx1.cpp:164
C++ wrapper for branching rules.
#define SCIP_CALL(x)
Definition: def.h:394
#define SCIP_Bool
Definition: def.h:93
static SCIP_DECL_BRANCHINITSOL(branchInitsolObj)
scip::ObjBranchrule * SCIPgetObjBranchrule(SCIP *scip, SCIP_BRANCHRULE *branchrule)
void SCIPbranchruleSetData(SCIP_BRANCHRULE *branchrule, SCIP_BRANCHRULEDATA *branchruledata)
Definition: branch.c:1859
const int scip_maxdepth_
Definition: objbranchrule.h:72
scip::ObjBranchrule * SCIPfindObjBranchrule(SCIP *scip, const char *name)
static SCIP_DECL_BRANCHCOPY(branchCopyObj)
SCIP_RETCODE SCIPincludeObjBranchrule(SCIP *scip, scip::ObjBranchrule *objbranchrule, SCIP_Bool deleteobject)
C++ wrapper for branching rules.
Definition: objbranchrule.h:54
const SCIP_Real scip_maxbounddist_
Definition: objbranchrule.h:78