Scippy

SCIP

Solving Constraint Integer Programs

probdata_binpacking.c File Reference

Detailed Description

Problem data for binpacking problem.

Author
Timo Berthold
Stefan Heinz

This file handles the main problem data used in that project. For more details see Main problem data page.

Definition in file probdata_binpacking.c.

#include <string.h>
#include "probdata_binpacking.h"
#include "vardata_binpacking.h"
#include "pricer_binpacking.h"
#include "scip/cons_setppc.h"
#include "scip/scip.h"

Go to the source code of this file.

Macros

Event handler properties
#define EVENTHDLR_NAME   "addedvar"
 
#define EVENTHDLR_DESC   "event handler for catching added variables"
 

Functions

Callback methods of event handler
static SCIP_DECL_EVENTEXEC (eventExecAddedVar)
 
Local methods
static SCIP_RETCODE probdataCreate (SCIP *scip, SCIP_PROBDATA **probdata, SCIP_VAR **vars, SCIP_CONS **conss, SCIP_Longint *weights, int *ids, int nvars, int nitems, SCIP_Longint capacity)
 
static SCIP_RETCODE probdataFree (SCIP *scip, SCIP_PROBDATA **probdata)
 
static SCIP_RETCODE createInitialColumns (SCIP *scip, SCIP_PROBDATA *probdata)
 
Callback methods of problem data
static SCIP_DECL_PROBDELORIG (probdelorigBinpacking)
 
static SCIP_DECL_PROBTRANS (probtransBinpacking)
 
static SCIP_DECL_PROBDELTRANS (probdeltransBinpacking)
 
static SCIP_DECL_PROBINITSOL (probinitsolBinpacking)
 
static SCIP_DECL_PROBEXITSOL (probexitsolBinpacking)
 
Interface methods
SCIP_RETCODE SCIPprobdataCreate (SCIP *scip, const char *probname, int *ids, SCIP_Longint *weights, int nitems, SCIP_Longint capacity)
 
int * SCIPprobdataGetIds (SCIP_PROBDATA *probdata)
 
SCIP_LongintSCIPprobdataGetWeights (SCIP_PROBDATA *probdata)
 
int SCIPprobdataGetNItems (SCIP_PROBDATA *probdata)
 
SCIP_Longint SCIPprobdataGetCapacity (SCIP_PROBDATA *probdata)
 
SCIP_VAR ** SCIPprobdataGetVars (SCIP_PROBDATA *probdata)
 
int SCIPprobdataGetNVars (SCIP_PROBDATA *probdata)
 
SCIP_CONS ** SCIPprobdataGetConss (SCIP_PROBDATA *probdata)
 
SCIP_RETCODE SCIPprobdataAddVar (SCIP *scip, SCIP_PROBDATA *probdata, SCIP_VAR *var)
 

Macro Definition Documentation

◆ EVENTHDLR_NAME

#define EVENTHDLR_NAME   "addedvar"

Definition at line 94 of file probdata_binpacking.c.

Referenced by SCIP_DECL_EVENTEXEC(), and SCIPprobdataCreate().

◆ EVENTHDLR_DESC

#define EVENTHDLR_DESC   "event handler for catching added variables"

Definition at line 95 of file probdata_binpacking.c.

Referenced by SCIPprobdataCreate().

Function Documentation

◆ SCIP_DECL_EVENTEXEC()

static SCIP_DECL_EVENTEXEC ( eventExecAddedVar  )
static

◆ probdataCreate()

static SCIP_RETCODE probdataCreate ( SCIP scip,
SCIP_PROBDATA **  probdata,
SCIP_VAR **  vars,
SCIP_CONS **  conss,
SCIP_Longint weights,
int *  ids,
int  nvars,
int  nitems,
SCIP_Longint  capacity 
)
static

creates problem data

Parameters
scipSCIP data structure
probdatapointer to problem data
varsall exist variables
conssset partitioning constraints for each job exactly one
weightsarray containing the item weights
idsarray of item ids
nvarsnumber of variables
nitemsnumber of items
capacitybin capacity

Definition at line 131 of file probdata_binpacking.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, and SCIPduplicateBlockMemoryArray.

Referenced by SCIP_DECL_PROBTRANS(), and SCIPprobdataCreate().

◆ probdataFree()

static SCIP_RETCODE probdataFree ( SCIP scip,
SCIP_PROBDATA **  probdata 
)
static

frees the memory of the given problem data

Parameters
scipSCIP data structure
probdatapointer to problem data

Definition at line 172 of file probdata_binpacking.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, SCIPreleaseCons(), and SCIPreleaseVar().

Referenced by SCIP_DECL_PROBDELORIG(), and SCIP_DECL_PROBDELTRANS().

◆ createInitialColumns()

static SCIP_RETCODE createInitialColumns ( SCIP scip,
SCIP_PROBDATA probdata 
)
static

◆ SCIP_DECL_PROBDELORIG()

static SCIP_DECL_PROBDELORIG ( probdelorigBinpacking  )
static

frees user data of original problem (called when the original problem is freed)

Definition at line 281 of file probdata_binpacking.c.

References probdataFree(), SCIP_CALL, SCIP_OKAY, and SCIPdebugMsg.

◆ SCIP_DECL_PROBTRANS()

static SCIP_DECL_PROBTRANS ( probtransBinpacking  )
static

creates user data of transformed problem by transforming the original user problem data (called after problem was transformed)

Definition at line 293 of file probdata_binpacking.c.

References probdataCreate(), SCIP_CALL, SCIP_OKAY, SCIPtransformConss(), and SCIPtransformVars().

◆ SCIP_DECL_PROBDELTRANS()

static SCIP_DECL_PROBDELTRANS ( probdeltransBinpacking  )
static

frees user data of transformed problem (called when the transformed problem is freed)

Definition at line 310 of file probdata_binpacking.c.

References probdataFree(), SCIP_CALL, SCIP_OKAY, and SCIPdebugMsg.

◆ SCIP_DECL_PROBINITSOL()

static SCIP_DECL_PROBINITSOL ( probinitsolBinpacking  )
static

solving process initialization method of transformed data (called before the branch and bound process begins)

Definition at line 321 of file probdata_binpacking.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_VARADDED, SCIP_OKAY, SCIPcatchEvent(), and SCIPfindEventhdlr().

◆ SCIP_DECL_PROBEXITSOL()

static SCIP_DECL_PROBEXITSOL ( probexitsolBinpacking  )
static

solving process deinitialization method of transformed data (called before the branch and bound data is freed)

Definition at line 338 of file probdata_binpacking.c.

References NULL, SCIP_CALL, SCIP_EVENTTYPE_VARADDED, SCIP_OKAY, SCIPdropEvent(), and SCIPfindEventhdlr().

◆ SCIPprobdataCreate()

SCIP_RETCODE SCIPprobdataCreate ( SCIP scip,
const char *  probname,
int *  ids,
SCIP_Longint weights,
int  nitems,
SCIP_Longint  capacity 
)

◆ SCIPprobdataGetIds()

int* SCIPprobdataGetIds ( SCIP_PROBDATA probdata)

returns array of item ids

Parameters
probdataproblem data

Definition at line 430 of file probdata_binpacking.c.

Referenced by addBranchingDecisionConss(), consdataPrint(), SCIP_DECL_BRANCHEXECLP(), and SCIPvardataPrint().

◆ SCIPprobdataGetWeights()

SCIP_Longint* SCIPprobdataGetWeights ( SCIP_PROBDATA probdata)

returns array of item weights

Parameters
probdataproblem data

Definition at line 438 of file probdata_binpacking.c.

◆ SCIPprobdataGetNItems()

int SCIPprobdataGetNItems ( SCIP_PROBDATA probdata)

returns number of items

Parameters
probdataproblem data

Definition at line 446 of file probdata_binpacking.c.

Referenced by SCIP_DECL_BRANCHEXECLP().

◆ SCIPprobdataGetCapacity()

SCIP_Longint SCIPprobdataGetCapacity ( SCIP_PROBDATA probdata)

returns bin capacity

Parameters
probdataproblem data

Definition at line 454 of file probdata_binpacking.c.

◆ SCIPprobdataGetVars()

SCIP_VAR** SCIPprobdataGetVars ( SCIP_PROBDATA probdata)

returns array of all variables itemed in the way they got generated

Parameters
probdataproblem data

Definition at line 462 of file probdata_binpacking.c.

◆ SCIPprobdataGetNVars()

int SCIPprobdataGetNVars ( SCIP_PROBDATA probdata)

returns number of variables

Parameters
probdataproblem data

Definition at line 470 of file probdata_binpacking.c.

◆ SCIPprobdataGetConss()

SCIP_CONS** SCIPprobdataGetConss ( SCIP_PROBDATA probdata)

returns array of set partitioning constrains

Parameters
probdataproblem data

Definition at line 478 of file probdata_binpacking.c.

◆ SCIPprobdataAddVar()

SCIP_RETCODE SCIPprobdataAddVar ( SCIP scip,
SCIP_PROBDATA probdata,
SCIP_VAR var 
)

adds given variable to the problem data

Parameters
scipSCIP data structure
probdataproblem data
varvariables to add

Definition at line 486 of file probdata_binpacking.c.

References MAX, SCIP_CALL, SCIP_OKAY, SCIPcaptureVar(), SCIPdebugMsg, and SCIPreallocBlockMemoryArray.

Referenced by createInitialColumns(), and SCIP_DECL_EVENTEXEC().