Detailed Description

internal miscellaneous methods for linear constraints

Author: Jakob Witzig

#include "scip/def.h"
#include "scip/type_retcode.h"
#include "scip/type_cons.h"
#include "scip/type_lp.h"
#include "scip/type_var.h"

Go to the source code of this file.

Functions
SCIP_EXPORT SCIP_Real	SCIPconsGetRhs (SCIP scip, SCIP_CONS cons, SCIP_Bool *success)

SCIP_EXPORT SCIP_Real	SCIPconsGetLhs (SCIP scip, SCIP_CONS cons, SCIP_Bool *success)

SCIP_EXPORT SCIP_RETCODE	SCIPgetConsVals (SCIP scip, SCIP_CONS cons, SCIP_Real vals, int varssize, SCIP_Bool success)

SCIP_EXPORT void	SCIPconsGetDualfarkas (SCIP scip, SCIP_CONS cons, SCIP_Real dualfarkas, SCIP_Bool success)

void	SCIPconsGetDualsol (SCIP scip, SCIP_CONS cons, SCIP_Real dualsol, SCIP_Bool success)

SCIP_EXPORT SCIP_ROW *	SCIPconsGetRow (SCIP scip, SCIP_CONS cons)

Function Documentation

◆ SCIPconsGetRhs()

SCIP_EXPORT SCIP_Real SCIPconsGetRhs	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	success
	)

returns the right-hand side of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the involved values

Parameters

scip	SCIP data structure
cons	constraint for which right-hand side is queried
success	pointer to store whether a valid right-hand side was returned

Definition at line 38 of file misc_linear.c.

References FALSE, NULL, SCIP_INVALID, SCIP_Real, SCIP_SETPPCTYPE_COVERING, SCIP_SETPPCTYPE_PACKING, SCIP_SETPPCTYPE_PARTITIONING, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetCapacityKnapsack(), SCIPgetRhsLinear(), SCIPgetRhsVarbound(), SCIPgetTypeSetppc(), SCIPinfinity(), SCIPwarningMessage(), and TRUE.

Referenced by computeStandardFeasibilityCut(), and computeStandardOptimalityCut().

◆ SCIPconsGetLhs()

SCIP_EXPORT SCIP_Real SCIPconsGetLhs	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	success
	)

returns the left-hand side of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the involved values

Parameters

scip	SCIP data structure
cons	constraint to get left-hand side for
success	pointer to store whether a valid left-hand side was returned

Definition at line 102 of file misc_linear.c.

References FALSE, NULL, SCIP_INVALID, SCIP_Real, SCIP_SETPPCTYPE_COVERING, SCIP_SETPPCTYPE_PACKING, SCIP_SETPPCTYPE_PARTITIONING, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetLhsLinear(), SCIPgetLhsVarbound(), SCIPgetTypeSetppc(), SCIPinfinity(), SCIPwarningMessage(), and TRUE.

Referenced by computeStandardFeasibilityCut(), and computeStandardOptimalityCut().

◆ SCIPgetConsVals()

SCIP_EXPORT SCIP_RETCODE SCIPgetConsVals	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Real *	vals,
		int	varssize,
		SCIP_Bool *	success
	)

returns the value array of an arbitrary SCIP constraint that can be represented as a single linear constraint

Returns: SCIP_OKAY is returned if everything worked. Otherwise a suitable error code is passed. See SCIP_RETCODE for a complete list of error codes.

Note: The success pointer indicates if the individual contraint handler was able to return the involved values

Parameters

scip	SCIP data structure
cons	constraint for which the coefficients are wanted
vals	array to store the coefficients of the constraint
varssize	available slots in vals array needed to check if the array is large enough
success	pointer to store whether the coefficients are successfully copied

Definition at line 169 of file misc_linear.c.

References FALSE, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetConsNVars(), SCIPgetValsLinear(), SCIPgetVbdcoefVarbound(), SCIPgetWeightsKnapsack(), SCIPgetWeightsSOS1(), SCIPgetWeightsSOS2(), SCIPwarningMessage(), and TRUE.

◆ SCIPconsGetDualfarkas()

SCIP_EXPORT void SCIPconsGetDualfarkas	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Real *	dualfarkas,
		SCIP_Bool *	success
	)

returns the dual farkas solution of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the dual farkas solution

returns the dual farkas sol of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the dual farkas solution

Parameters

scip	SCIP data structure
cons	constraint to get the dual farkas solution for
dualfarkas	pointer to store the dual farkas solution
success	pointer to store whether the dual farkas solution is successfully returned

Definition at line 291 of file misc_linear.c.

References FALSE, NULL, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetDualfarkasKnapsack(), SCIPgetDualfarkasLinear(), SCIPgetDualfarkasLogicor(), SCIPgetDualfarkasSetppc(), SCIPgetDualfarkasVarbound(), SCIPwarningMessage(), and TRUE.

Referenced by computeStandardFeasibilityCut().

◆ SCIPconsGetDualsol()

void SCIPconsGetDualsol	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Real *	dualsol,
		SCIP_Bool *	success
	)

returns the dual solution of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the dual solution

returns the dual sol of an arbitrary SCIP constraint that can be represented as a single linear constraint

Note: The success pointer indicates if the individual contraint handler was able to return the dual solution

Parameters

scip	SCIP data structure
cons	constraint to get the dual solution for
dualsol	pointer to store the dual solution
success	pointer to store whether the dual solution is successfully returned

Definition at line 347 of file misc_linear.c.

References FALSE, NULL, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetDualsolKnapsack(), SCIPgetDualsolLinear(), SCIPgetDualsolLogicor(), SCIPgetDualsolSetppc(), SCIPgetDualsolVarbound(), SCIPwarningMessage(), and TRUE.