Presolver

Detailed Description

functions for presolver plugins

Topics
	Special Methods
	methods commonly used for presolving

Functions
	SCIP_DECL_SORTPTRCOMP (SCIPpresolComp)
	SCIP_DECL_SORTPTRCOMP (SCIPpresolCompName)
SCIP_PRESOLDATA *	SCIPpresolGetData (SCIP_PRESOL *presol)
void	SCIPpresolSetData (SCIP_PRESOL *presol, SCIP_PRESOLDATA *presoldata)
void	SCIPpresolMarkExact (SCIP_PRESOL *presol)
const char *	SCIPpresolGetName (SCIP_PRESOL *presol)
const char *	SCIPpresolGetDesc (SCIP_PRESOL *presol)
int	SCIPpresolGetPriority (SCIP_PRESOL *presol)
int	SCIPpresolGetMaxrounds (SCIP_PRESOL *presol)
SCIP_PRESOLTIMING	SCIPpresolGetTiming (SCIP_PRESOL *presol)
void	SCIPpresolSetTiming (SCIP_PRESOL *presol, SCIP_PRESOLTIMING timing)
SCIP_Bool	SCIPpresolIsInitialized (SCIP_PRESOL *presol)
SCIP_Real	SCIPpresolGetSetupTime (SCIP_PRESOL *presol)
SCIP_Real	SCIPpresolGetTime (SCIP_PRESOL *presol)
int	SCIPpresolGetNFixedVars (SCIP_PRESOL *presol)
int	SCIPpresolGetNAggrVars (SCIP_PRESOL *presol)
int	SCIPpresolGetNChgVarTypes (SCIP_PRESOL *presol)
int	SCIPpresolGetNChgBds (SCIP_PRESOL *presol)
int	SCIPpresolGetNAddHoles (SCIP_PRESOL *presol)
int	SCIPpresolGetNDelConss (SCIP_PRESOL *presol)
int	SCIPpresolGetNAddConss (SCIP_PRESOL *presol)
int	SCIPpresolGetNUpgdConss (SCIP_PRESOL *presol)
int	SCIPpresolGetNChgCoefs (SCIP_PRESOL *presol)
int	SCIPpresolGetNChgSides (SCIP_PRESOL *presol)
int	SCIPpresolGetNCalls (SCIP_PRESOL *presol)
SCIP_RETCODE	SCIPincludePresol (SCIP *scip, const char *name, const char *desc, int priority, int maxrounds, SCIP_PRESOLTIMING timing, SCIP_DECL_PRESOLCOPY((*presolcopy)), SCIP_DECL_PRESOLFREE((*presolfree)), SCIP_DECL_PRESOLINIT((*presolinit)), SCIP_DECL_PRESOLEXIT((*presolexit)), SCIP_DECL_PRESOLINITPRE((*presolinitpre)), SCIP_DECL_PRESOLEXITPRE((*presolexitpre)), SCIP_DECL_PRESOLEXEC((*presolexec)), SCIP_PRESOLDATA *presoldata)
SCIP_RETCODE	SCIPincludePresolBasic (SCIP *scip, SCIP_PRESOL **presolptr, const char *name, const char *desc, int priority, int maxrounds, SCIP_PRESOLTIMING timing, SCIP_DECL_PRESOLEXEC((*presolexec)), SCIP_PRESOLDATA *presoldata)
SCIP_RETCODE	SCIPsetPresolCopy (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_RETCODE	SCIPsetPresolFree (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_RETCODE	SCIPsetPresolInit (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_RETCODE	SCIPsetPresolExit (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_RETCODE	SCIPsetPresolInitpre (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_RETCODE	SCIPsetPresolExitpre (SCIP *scip, SCIP_PRESOL *presol,)
SCIP_PRESOL *	SCIPfindPresol (SCIP *scip, const char *name)
SCIP_PRESOL **	SCIPgetPresols (SCIP *scip)
int	SCIPgetNPresols (SCIP *scip)
SCIP_RETCODE	SCIPsetPresolPriority (SCIP *scip, SCIP_PRESOL *presol, int priority)
int	SCIPgetNPresolRounds (SCIP *scip)

Function Documentation

SCIP_DECL_SORTPTRCOMP() [1/2]

SCIP_DECL_SORTPTRCOMP

(

SCIPpresolComp

)

compares two presolvers w. r. to their priority

Definition at line 57 of file presol.c.

SCIP_DECL_SORTPTRCOMP() [2/2]

SCIP_DECL_SORTPTRCOMP

(

SCIPpresolCompName

)

comparison method for sorting presolvers w.r.t. to their name

Definition at line 63 of file presol.c.

References SCIPpresolGetName().

SCIPpresolGetData()

SCIP_PRESOLDATA * SCIPpresolGetData

(

SCIP_PRESOL *

presol

)

gets user data of presolver

Parameters

presol

presolver

Definition at line 528 of file presol.c.

References assert(), NULL, and SCIP_Presol::presoldata.

Referenced by SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXIT(), SCIP_DECL_PRESOLEXIT(), SCIP_DECL_PRESOLEXITPRE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLINIT(), SCIP_DECL_PRESOLINIT(), SCIP_DECL_PRESOLINIT(), SCIP_DECL_PRESOLINIT(), SCIP_DECL_PRESOLINITPRE(), SCIPfindObjPresol(), and SCIPgetObjPresol().

SCIPpresolSetData()

void SCIPpresolSetData	(	SCIP_PRESOL *	presol,
		SCIP_PRESOLDATA *	presoldata )

sets user data of presolver; user has to free old data in advance!

Parameters

presol	presolver
presoldata	new presolver user data

Definition at line 538 of file presol.c.

References assert(), NULL, and SCIP_Presol::presoldata.

Referenced by SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_PRESOLFREE(), and SCIP_DECL_PRESOLFREE().

SCIPpresolMarkExact()

void SCIPpresolMarkExact

(

SCIP_PRESOL *

presol

)

marks the presolver as safe to use in exact solving mode

Parameters

presol

presolver

Definition at line 615 of file presol.c.

References assert(), SCIP_Presol::exact, NULL, and TRUE.

SCIPpresolGetName()

const char * SCIPpresolGetName

(

SCIP_PRESOL *

presol

)

gets name of presolver

Parameters

presol

presolver

Definition at line 625 of file presol.c.

References assert(), SCIP_Presol::name, and NULL.

Referenced by paramsetSetPresolvingAggressive(), paramsetSetPresolvingDefault(), paramsetSetPresolvingOff(), presolveRound(), SCIP_DECL_DIALOGEXEC(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLCOPY(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_SORTPTRCOMP(), SCIPcollectPresolverStatistics(), SCIPcopyConcurrentSolvingStats(), SCIPincludeDialogDefaultFix(), SCIPincludeDialogDefaultSet(), SCIPpresolCopyInclude(), and SCIPprintPresolverStatistics().

SCIPpresolGetDesc()

const char * SCIPpresolGetDesc

(

SCIP_PRESOL *

presol

)

gets description of presolver

Parameters

presol

presolver

Definition at line 635 of file presol.c.

References assert(), SCIP_Presol::desc, and NULL.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPcollectPresolverStatistics(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

SCIPpresolGetPriority()

int SCIPpresolGetPriority

(

SCIP_PRESOL *

presol

)

gets priority of presolver

Parameters

presol

presolver

Definition at line 645 of file presol.c.

References assert(), NULL, and SCIP_Presol::priority.

Referenced by presolveRound(), and SCIP_DECL_DIALOGEXEC().

SCIPpresolGetMaxrounds()

int SCIPpresolGetMaxrounds

(

SCIP_PRESOL *

presol

)

gets round limit of presolver

Parameters

presol

presolver

Definition at line 655 of file presol.c.

References assert(), SCIP_Presol::maxrounds, and NULL.

Referenced by SCIP_DECL_DIALOGEXEC().

SCIPpresolGetTiming()

SCIP_PRESOLTIMING SCIPpresolGetTiming

(

SCIP_PRESOL *

presol

)

gets the timing mask of the presolver

Parameters

presol

presolver

Definition at line 679 of file presol.c.

References assert(), NULL, and SCIP_Presol::timing.

Referenced by SCIP_DECL_DIALOGEXEC().

SCIPpresolSetTiming()

void SCIPpresolSetTiming	(	SCIP_PRESOL *	presol,
		SCIP_PRESOLTIMING	timing )

sets the timing mask of the presolver

Parameters

presol	presolver
timing	timing mask of the presolver

Definition at line 689 of file presol.c.

References assert(), NULL, and SCIP_Presol::timing.

SCIPpresolIsInitialized()

SCIP_Bool SCIPpresolIsInitialized

(

SCIP_PRESOL *

presol

)

is presolver initialized?

Parameters

presol

presolver

Definition at line 700 of file presol.c.

References assert(), SCIP_Presol::initialized, NULL, and SCIP_Bool.

SCIPpresolGetSetupTime()

SCIP_Real SCIPpresolGetSetupTime

(

SCIP_PRESOL *

presol

)

gets time in seconds used in this presolver for setting up for next stages

Parameters

presol

presolver

Definition at line 722 of file presol.c.

References assert(), NULL, SCIP_Real, SCIPclockGetTime(), and SCIP_Presol::setuptime.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetTime()

SCIP_Real SCIPpresolGetTime

(

SCIP_PRESOL *

presol

)

gets time in seconds used in this presolver

Parameters

presol

presolver

Definition at line 732 of file presol.c.

References assert(), NULL, SCIP_Presol::presolclock, SCIP_Real, and SCIPclockGetTime().

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNFixedVars()

int SCIPpresolGetNFixedVars

(

SCIP_PRESOL *

presol

)

gets number of variables fixed in presolver

Parameters

presol

presolver

Definition at line 742 of file presol.c.

References assert(), SCIP_Presol::nfixedvars, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNAggrVars()

int SCIPpresolGetNAggrVars

(

SCIP_PRESOL *

presol

)

gets number of variables aggregated in presolver

Parameters

presol

presolver

Definition at line 752 of file presol.c.

References assert(), SCIP_Presol::naggrvars, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNChgVarTypes()

int SCIPpresolGetNChgVarTypes

(

SCIP_PRESOL *

presol

)

gets number of variable types changed in presolver

Parameters

presol

presolver

Definition at line 762 of file presol.c.

References assert(), SCIP_Presol::nchgvartypes, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNChgBds()

int SCIPpresolGetNChgBds

(

SCIP_PRESOL *

presol

)

gets number of bounds changed in presolver

Parameters

presol

presolver

Definition at line 772 of file presol.c.

References assert(), SCIP_Presol::nchgbds, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNAddHoles()

int SCIPpresolGetNAddHoles

(

SCIP_PRESOL *

presol

)

gets number of holes added to domains of variables in presolver

Parameters

presol

presolver

Definition at line 782 of file presol.c.

References assert(), SCIP_Presol::naddholes, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNDelConss()

int SCIPpresolGetNDelConss

(

SCIP_PRESOL *

presol

)

gets number of constraints deleted in presolver

Parameters

presol

presolver

Definition at line 792 of file presol.c.

References assert(), SCIP_Presol::ndelconss, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNAddConss()

int SCIPpresolGetNAddConss

(

SCIP_PRESOL *

presol

)

gets number of constraints added in presolver

Parameters

presol

presolver

Definition at line 802 of file presol.c.

References assert(), SCIP_Presol::naddconss, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNUpgdConss()

int SCIPpresolGetNUpgdConss

(

SCIP_PRESOL *

presol

)

gets number of constraints upgraded in presolver

Parameters

presol

presolver

Definition at line 812 of file presol.c.

References assert(), NULL, and SCIP_Presol::nupgdconss.

SCIPpresolGetNChgCoefs()

int SCIPpresolGetNChgCoefs

(

SCIP_PRESOL *

presol

)

gets number of coefficients changed in presolver

Parameters

presol

presolver

Definition at line 822 of file presol.c.

References assert(), SCIP_Presol::nchgcoefs, and NULL.

Referenced by SCIP_DECL_PRESOLEXEC(), SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNChgSides()

int SCIPpresolGetNChgSides

(

SCIP_PRESOL *

presol

)

gets number of constraint sides changed in presolver

Parameters

presol

presolver

Definition at line 832 of file presol.c.

References assert(), SCIP_Presol::nchgsides, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPpresolGetNCalls()

int SCIPpresolGetNCalls

(

SCIP_PRESOL *

presol

)

gets number of times the presolver was called and tried to find reductions

Parameters

presol

presolver

Definition at line 842 of file presol.c.

References assert(), SCIP_Presol::ncalls, and NULL.

Referenced by SCIPcollectPresolverStatistics(), and SCIPprintPresolverStatistics().

SCIPincludePresol()

SCIP_RETCODE SCIPincludePresol	(	SCIP *	scip,
		const char *	name,
		const char *	desc,
		int	priority,
		int	maxrounds,
		SCIP_PRESOLTIMING	timing,
		SCIP_DECL_PRESOLCOPY((*presolcopy))	,
		SCIP_DECL_PRESOLFREE((*presolfree))	,
		SCIP_DECL_PRESOLINIT((*presolinit))	,
		SCIP_DECL_PRESOLEXIT((*presolexit))	,
		SCIP_DECL_PRESOLINITPRE((*presolinitpre))	,
		SCIP_DECL_PRESOLEXITPRE((*presolexitpre))	,
		SCIP_DECL_PRESOLEXEC((*presolexec))	,
		SCIP_PRESOLDATA *	presoldata )

creates a presolver and includes it in SCIP

Note

method has all presolver callbacks as arguments and is thus changed every time a new callback is added in future releases; consider using SCIPincludePresolBasic() and setter functions if you seek for a method which is less likely to change in future releases

creates a presolver and includes it in SCIP.

Precondition

This method can be called if SCIP is in one of the following stages:

• SCIP_STAGE_INIT
• SCIP_STAGE_PROBLEM

Note

method has all presolver callbacks as arguments and is thus changed every time a new callback is added in future releases; consider using SCIPincludePresolBasic() and setter functions if you seek for a method which is less likely to change in future releases

Parameters

scip	SCIP data structure
name	name of presolver
desc	description of presolver
priority	priority of the presolver (>= 0: before, < 0: after constraint handlers)
maxrounds	maximal number of presolving rounds the presolver participates in (-1: no limit)
timing	timing mask of the presolver
presoldata	presolver data

Definition at line 66 of file scip_presol.c.

References FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLCOPY, SCIP_DECL_PRESOLEXEC, SCIP_DECL_PRESOLEXIT, SCIP_DECL_PRESOLFREE, SCIP_DECL_PRESOLINIT, SCIP_INVALIDDATA, SCIP_OKAY, SCIPcheckStage, SCIPerrorMessage, SCIPfindPresol(), SCIPpresolCreate(), SCIPsetIncludePresol(), and TRUE.

Referenced by SCIPincludeObjPresol().

SCIPincludePresolBasic()

SCIP_RETCODE SCIPincludePresolBasic	(	SCIP *	scip,
		SCIP_PRESOL **	presolptr,
		const char *	name,
		const char *	desc,
		int	priority,
		int	maxrounds,
		SCIP_PRESOLTIMING	timing,
		SCIP_DECL_PRESOLEXEC((*presolexec))	,
		SCIP_PRESOLDATA *	presoldata )

Creates a presolver and includes it in SCIP with its fundamental callback. All non-fundamental (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL. Optional callbacks can be set via specific setter functions. These are SCIPsetPresolCopy(), SCIPsetPresolFree(), SCIPsetPresolInit(), SCIPsetPresolExit(), SCIPsetPresolInitpre(), and SCIPsetPresolExitPre().

Note

if you want to set all callbacks with a single method call, consider using SCIPincludePresol() instead

creates a presolver and includes it in SCIP with its fundamental callback. All non-fundamental (or optional) callbacks as, e.g., init and exit callbacks, will be set to NULL. Optional callbacks can be set via specific setter functions. These are SCIPsetPresolCopy(), SCIPsetPresolFree(), SCIPsetPresolInit(), SCIPsetPresolExit(), SCIPsetPresolInitpre(), and SCIPsetPresolExitPre().

Precondition

This method can be called if SCIP is in one of the following stages:

• SCIP_STAGE_INIT
• SCIP_STAGE_PROBLEM

Note

if you want to set all callbacks with a single method call, consider using SCIPincludePresol() instead

Parameters

scip	SCIP data structure
presolptr	reference to presolver, or NULL
name	name of presolver
desc	description of presolver
priority	priority of the presolver (>= 0: before, < 0: after constraint handlers)
maxrounds	maximal number of presolving rounds the presolver participates in (-1: no limit)
timing	timing mask of the presolver
presoldata	presolver data

Definition at line 113 of file scip_presol.c.

References FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLEXEC, SCIP_INVALIDDATA, SCIP_OKAY, SCIPcheckStage, SCIPerrorMessage, SCIPfindPresol(), SCIPpresolCreate(), SCIPsetIncludePresol(), and TRUE.

Referenced by SCIPincludePresolBoundshift(), SCIPincludePresolConvertinttobin(), SCIPincludePresolDomcol(), SCIPincludePresolDualagg(), SCIPincludePresolDualcomp(), SCIPincludePresolDualinfer(), SCIPincludePresolDualsparsify(), SCIPincludePresolGateextraction(), SCIPincludePresolImplics(), SCIPincludePresolImplint(), SCIPincludePresolInttobinary(), SCIPincludePresolQPKKTref(), SCIPincludePresolRedvub(), SCIPincludePresolSparsify(), SCIPincludePresolStuffing(), SCIPincludePresolTrivial(), and SCIPincludePresolTworowbnd().

SCIPsetPresolCopy()

SCIP_RETCODE SCIPsetPresolCopy	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets copy method of presolver

Parameters

scip	SCIP data structure
presol	presolver copy method of presolver or NULL if you don't want to copy your plugin into sub-SCIPs

Definition at line 148 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLCOPY, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetCopy(), and TRUE.

Referenced by SCIPincludePresolBoundshift(), SCIPincludePresolConvertinttobin(), SCIPincludePresolDomcol(), SCIPincludePresolDualagg(), SCIPincludePresolDualcomp(), SCIPincludePresolDualinfer(), SCIPincludePresolDualsparsify(), SCIPincludePresolGateextraction(), SCIPincludePresolImplics(), SCIPincludePresolImplint(), SCIPincludePresolInttobinary(), SCIPincludePresolQPKKTref(), SCIPincludePresolRedvub(), SCIPincludePresolSparsify(), SCIPincludePresolStuffing(), SCIPincludePresolTrivial(), and SCIPincludePresolTworowbnd().

SCIPsetPresolFree()

SCIP_RETCODE SCIPsetPresolFree	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets destructor method of presolver

Parameters

scip	SCIP data structure
presol	presolver destructor of presolver

Definition at line 164 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLFREE, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetFree(), and TRUE.

Referenced by SCIPincludePresolBoundshift(), SCIPincludePresolConvertinttobin(), SCIPincludePresolDomcol(), SCIPincludePresolDualcomp(), SCIPincludePresolDualinfer(), SCIPincludePresolDualsparsify(), SCIPincludePresolGateextraction(), SCIPincludePresolImplint(), SCIPincludePresolQPKKTref(), SCIPincludePresolSparsify(), and SCIPincludePresolTworowbnd().

SCIPsetPresolInit()

SCIP_RETCODE SCIPsetPresolInit	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets initialization method of presolver

Parameters

scip	SCIP data structure
presol	presolver initialize presolver

Definition at line 180 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLINIT, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetInit(), and TRUE.

Referenced by SCIPincludePresolDualsparsify(), SCIPincludePresolSparsify(), and SCIPincludePresolTworowbnd().

SCIPsetPresolExit()

SCIP_RETCODE SCIPsetPresolExit	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets deinitialization method of presolver

Parameters

scip	SCIP data structure
presol	presolver deinitialize presolver

Definition at line 196 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLEXIT, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetExit(), and TRUE.

Referenced by SCIPincludePresolGateextraction().

SCIPsetPresolInitpre()

SCIP_RETCODE SCIPsetPresolInitpre	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets solving process initialization method of presolver

Parameters

scip	SCIP data structure
presol	presolver solving process initialization method of presolver

Definition at line 212 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLINITPRE, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetInitpre(), and TRUE.

Referenced by SCIPincludePresolGateextraction().

SCIPsetPresolExitpre()

SCIP_RETCODE SCIPsetPresolExitpre	(	SCIP *	scip,
		SCIP_PRESOL *	presol )

sets solving process deinitialization method of presolver

Parameters

scip	SCIP data structure
presol	presolver solving process deinitialization method of presolver

Definition at line 228 of file scip_presol.c.

References assert(), FALSE, NULL, SCIP_CALL, SCIP_DECL_PRESOLEXITPRE, SCIP_OKAY, SCIPcheckStage, SCIPpresolSetExitpre(), and TRUE.

Referenced by SCIPincludePresolGateextraction().

SCIPfindPresol()

SCIP_PRESOL * SCIPfindPresol	(	SCIP *	scip,
		const char *	name )

returns the presolver of the given name, or NULL if not existing

Parameters

scip	SCIP data structure
name	name of presolver

Definition at line 244 of file scip_presol.c.

References assert(), NULL, and SCIPsetFindPresol().

Referenced by SCIP_DECL_PRESOLCOPY(), SCIPcopyConcurrentSolvingStats(), SCIPfindObjPresol(), SCIPincludePresol(), and SCIPincludePresolBasic().

SCIPgetPresols()

SCIP_PRESOL ** SCIPgetPresols

(

SCIP *

scip

)

returns the array of currently available presolvers

Parameters

scip	SCIP data structure

Definition at line 257 of file scip_presol.c.

References assert(), NULL, and SCIPsetSortPresols().

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPcopyConcurrentSolvingStats(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

SCIPgetNPresols()

int SCIPgetNPresols

(

SCIP *

scip

)

returns the number of currently available presolvers

Parameters

scip	SCIP data structure

Definition at line 270 of file scip_presol.c.

References assert(), and NULL.

Referenced by SCIP_DECL_DIALOGEXEC(), SCIPcopyConcurrentSolvingStats(), SCIPincludeDialogDefaultFix(), and SCIPincludeDialogDefaultSet().

SCIPsetPresolPriority()

SCIP_RETCODE SCIPsetPresolPriority	(	SCIP *	scip,
		SCIP_PRESOL *	presol,
		int	priority )

sets the priority of a presolver

Parameters

scip	SCIP data structure
presol	presolver
priority	new priority of the presolver

Definition at line 281 of file scip_presol.c.

References assert(), NULL, SCIP_OKAY, and SCIPpresolSetPriority().

Referenced by SCIP_DECL_PARAMCHGD().

SCIPgetNPresolRounds()

int SCIPgetNPresolRounds

(

SCIP *

scip

)

returns the number of presolve rounds (current or last presolve)

Parameters

scip	SCIP data structure

Definition at line 296 of file scip_presol.c.

References assert(), and NULL.

Referenced by solveSubNLP().