Scippy

SCIP

Solving Constraint Integer Programs

objpricer.cpp
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3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
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23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24 
25 /**@file objpricer.cpp
26  * @brief C++ wrapper for variable pricers
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 "objpricer.h"
35 
36 
37 
38 
39 /*
40  * Data structures
41  */
42 
43 /** variable pricer data */
44 struct SCIP_PricerData
45 {
46  scip::ObjPricer* objpricer; /**< variable pricer object */
47  SCIP_Bool deleteobject; /**< should the pricer object be deleted when pricer is freed? */
48 };
49 
50 
51 
52 
53 /*
54  * Callback methods of variable pricer
55  */
56 
57 extern "C"
58 {
59 
60 /** copy method for pricer plugins (called when SCIP copies plugins) */
61 static
62 SCIP_DECL_PRICERCOPY(pricerCopyObj)
63 { /*lint --e{715}*/
64  SCIP_PRICERDATA* pricerdata;
65 
66  assert(scip != NULL);
67 
68  pricerdata = SCIPpricerGetData(pricer);
69  assert(pricerdata != NULL);
70  assert(pricerdata->objpricer != NULL);
71  assert(pricerdata->objpricer->scip_ != scip);
72 
73  if( pricerdata->objpricer->iscloneable() )
74  {
75  scip::ObjPricer* newobjpricer;
76  newobjpricer = dynamic_cast<scip::ObjPricer*> (pricerdata->objpricer->clone(scip, valid));
77 
78  /* call include method of pricer object */
79  SCIP_CALL( SCIPincludeObjPricer(scip, newobjpricer, TRUE) );
80  }
81 
82  return SCIP_OKAY;
83 }
84 
85 /** destructor of variable pricer to free user data (called when SCIP is exiting) */
86 static
87 SCIP_DECL_PRICERFREE(pricerFreeObj)
88 { /*lint --e{715}*/
89  SCIP_PRICERDATA* pricerdata;
90 
91  pricerdata = SCIPpricerGetData(pricer);
92  assert(pricerdata != NULL);
93  assert(pricerdata->objpricer != NULL);
94  assert(pricerdata->objpricer->scip_ == scip);
95 
96  /* call virtual method of pricer object */
97  SCIP_CALL( pricerdata->objpricer->scip_free(scip, pricer) );
98 
99  /* free pricer object */
100  if( pricerdata->deleteobject )
101  delete pricerdata->objpricer;
102 
103  /* free pricer data */
104  delete pricerdata;
105  SCIPpricerSetData(pricer, NULL); /*lint !e64*/
106 
107  return SCIP_OKAY;
108 }
109 
110 
111 /** initialization method of variable pricer (called after problem was transformed) */
112 static
113 SCIP_DECL_PRICERINIT(pricerInitObj)
114 { /*lint --e{715}*/
115  SCIP_PRICERDATA* pricerdata;
116 
117  pricerdata = SCIPpricerGetData(pricer);
118  assert(pricerdata != NULL);
119  assert(pricerdata->objpricer != NULL);
120  assert(pricerdata->objpricer->scip_ == scip);
121 
122  /* call virtual method of pricer object */
123  SCIP_CALL( pricerdata->objpricer->scip_init(scip, pricer) );
124 
125  return SCIP_OKAY;
126 }
127 
128 
129 /** deinitialization method of variable pricer (called before transformed problem is freed) */
130 static
131 SCIP_DECL_PRICEREXIT(pricerExitObj)
132 { /*lint --e{715}*/
133  SCIP_PRICERDATA* pricerdata;
134 
135  pricerdata = SCIPpricerGetData(pricer);
136  assert(pricerdata != NULL);
137  assert(pricerdata->objpricer != NULL);
138 
139  /* call virtual method of pricer object */
140  SCIP_CALL( pricerdata->objpricer->scip_exit(scip, pricer) );
141 
142  return SCIP_OKAY;
143 }
144 
145 
146 /** solving process initialization method of variable pricer (called when branch and bound process is about to begin) */
147 static
148 SCIP_DECL_PRICERINITSOL(pricerInitsolObj)
149 { /*lint --e{715}*/
150  SCIP_PRICERDATA* pricerdata;
151 
152  pricerdata = SCIPpricerGetData(pricer);
153  assert(pricerdata != NULL);
154  assert(pricerdata->objpricer != NULL);
155 
156  /* call virtual method of pricer object */
157  SCIP_CALL( pricerdata->objpricer->scip_initsol(scip, pricer) );
158 
159  return SCIP_OKAY;
160 }
161 
162 
163 /** solving process deinitialization method of variable pricer (called before branch and bound process data is freed) */
164 static
165 SCIP_DECL_PRICEREXITSOL(pricerExitsolObj)
166 { /*lint --e{715}*/
167  SCIP_PRICERDATA* pricerdata;
168 
169  pricerdata = SCIPpricerGetData(pricer);
170  assert(pricerdata != NULL);
171  assert(pricerdata->objpricer != NULL);
172 
173  /* call virtual method of pricer object */
174  SCIP_CALL( pricerdata->objpricer->scip_exitsol(scip, pricer) );
175 
176  return SCIP_OKAY;
177 }
178 
179 
180 /** reduced cost pricing method of variable pricer for feasible LPs */
181 static
182 SCIP_DECL_PRICERREDCOST(pricerRedcostObj)
183 { /*lint --e{715}*/
184  SCIP_PRICERDATA* pricerdata;
185 
186  pricerdata = SCIPpricerGetData(pricer);
187  assert(pricerdata != NULL);
188  assert(pricerdata->objpricer != NULL);
189 
190  /* call virtual method of pricer object */
191  SCIP_CALL( pricerdata->objpricer->scip_redcost(scip, pricer, lowerbound, stopearly, result) );
192 
193  return SCIP_OKAY;
194 }
195 
196 
197 /** farkas pricing method of variable pricer for infeasible LPs */
198 static
199 SCIP_DECL_PRICERFARKAS(pricerFarkasObj)
200 { /*lint --e{715}*/
201  SCIP_PRICERDATA* pricerdata;
202 
203  pricerdata = SCIPpricerGetData(pricer);
204  assert(pricerdata != NULL);
205  assert(pricerdata->objpricer != NULL);
206 
207  /* call virtual method of pricer object */
208  SCIP_CALL( pricerdata->objpricer->scip_farkas(scip, pricer, result) );
209 
210  return SCIP_OKAY;
211 }
212 }
213 
214 
215 
216 /*
217  * variable pricer specific interface methods
218  */
219 
220 /** creates the variable pricer for the given variable pricer object and includes it in SCIP */
222  SCIP* scip, /**< SCIP data structure */
223  scip::ObjPricer* objpricer, /**< variable pricer object */
224  SCIP_Bool deleteobject /**< should the pricer object be deleted when pricer is freed? */
225  )
226 {
227  SCIP_PRICERDATA* pricerdata;
228 
229  assert(scip != NULL);
230  assert(objpricer != NULL);
231 
232  /* create variable pricer data */
233  pricerdata = new SCIP_PRICERDATA;
234  pricerdata->objpricer = objpricer;
235  pricerdata->deleteobject = deleteobject;
236 
237  /* include variable pricer */
238  SCIP_CALL( SCIPincludePricer(scip, objpricer->scip_name_, objpricer->scip_desc_, objpricer->scip_priority_,
239  objpricer->scip_delay_,
240  pricerCopyObj,
241  pricerFreeObj, pricerInitObj, pricerExitObj,
242  pricerInitsolObj, pricerExitsolObj, pricerRedcostObj, pricerFarkasObj,
243  pricerdata) ); /*lint !e429*/
244 
245  return SCIP_OKAY; /*lint !e429*/
246 }
247 
248 /** returns the variable pricer object of the given name, or 0 if not existing */
250  SCIP* scip, /**< SCIP data structure */
251  const char* name /**< name of variable pricer */
252  )
253 {
254  SCIP_PRICER* pricer;
255  SCIP_PRICERDATA* pricerdata;
256 
257  pricer = SCIPfindPricer(scip, name);
258  if( pricer == NULL )
259  return 0;
260 
261  pricerdata = SCIPpricerGetData(pricer);
262  assert(pricerdata != NULL);
263 
264  return pricerdata->objpricer;
265 }
266 
267 /** returns the variable pricer object for the given pricer */
269  SCIP* scip, /**< SCIP data structure */
270  SCIP_PRICER* pricer /**< pricer */
271  )
272 {
273  SCIP_PRICERDATA* pricerdata;
274 
275  assert(scip != NULL);
276  pricerdata = SCIPpricerGetData(pricer);
277  assert(pricerdata != NULL);
278 
279  return pricerdata->objpricer;
280 }
void SCIPpricerSetData(SCIP_PRICER *pricer, SCIP_PRICERDATA *pricerdata)
Definition: pricer.c:520
C++ wrapper for variable pricer.
Definition: objpricer.h:52
scip::ObjPricer * SCIPgetObjPricer(SCIP *scip, SCIP_PRICER *pricer)
Definition: objpricer.cpp:268
static SCIP_DECL_PRICERINIT(pricerInitObj)
Definition: objpricer.cpp:113
SCIP_PRICER * SCIPfindPricer(SCIP *scip, const char *name)
Definition: scip_pricer.c:311
#define TRUE
Definition: def.h:95
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
SCIP_RETCODE SCIPincludeObjPricer(SCIP *scip, scip::ObjPricer *objpricer, SCIP_Bool deleteobject)
Definition: objpricer.cpp:221
static SCIP_DECL_PRICEREXIT(pricerExitObj)
Definition: objpricer.cpp:131
SCIP_PRICERDATA * SCIPpricerGetData(SCIP_PRICER *pricer)
Definition: pricer.c:510
static SCIP_DECL_PRICEREXITSOL(pricerExitsolObj)
Definition: objpricer.cpp:165
static SCIP_DECL_PRICERREDCOST(pricerRedcostObj)
Definition: objpricer.cpp:182
#define NULL
Definition: lpi_spx1.cpp:164
#define SCIP_CALL(x)
Definition: def.h:394
char * scip_desc_
Definition: objpricer.h:64
static SCIP_DECL_PRICERINITSOL(pricerInitsolObj)
Definition: objpricer.cpp:148
#define SCIP_Bool
Definition: def.h:93
char * scip_name_
Definition: objpricer.h:61
static SCIP_DECL_PRICERFREE(pricerFreeObj)
Definition: objpricer.cpp:87
const SCIP_Bool scip_delay_
Definition: objpricer.h:72
static SCIP_DECL_PRICERCOPY(pricerCopyObj)
Definition: objpricer.cpp:62
SCIP_RETCODE SCIPincludePricer(SCIP *scip, const char *name, const char *desc, int priority, SCIP_Bool delay, SCIP_DECL_PRICERCOPY((*pricercopy)), SCIP_DECL_PRICERFREE((*pricerfree)), SCIP_DECL_PRICERINIT((*pricerinit)), SCIP_DECL_PRICEREXIT((*pricerexit)), SCIP_DECL_PRICERINITSOL((*pricerinitsol)), SCIP_DECL_PRICEREXITSOL((*pricerexitsol)), SCIP_DECL_PRICERREDCOST((*pricerredcost)), SCIP_DECL_PRICERFARKAS((*pricerfarkas)), SCIP_PRICERDATA *pricerdata)
Definition: scip_pricer.c:69
scip::ObjPricer * SCIPfindObjPricer(SCIP *scip, const char *name)
Definition: objpricer.cpp:249
struct SCIP_PricerData SCIP_PRICERDATA
Definition: type_pricer.h:45
const int scip_priority_
Definition: objpricer.h:67
C++ wrapper for variable pricers.
static SCIP_DECL_PRICERFARKAS(pricerFarkasObj)
Definition: objpricer.cpp:199