Detailed Description

methods for handling nlp interface

Author: Stefan Vigerske; Thorsten Gellermann

Definition in file nlpi.c.

#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "scip/pub_message.h"
#include "nlpi/nlpi.h"
#include "nlpi/struct_nlpi.h"
#include "blockmemshell/memory.h"

Go to the source code of this file.

Functions
	SCIP_DECL_SORTPTRCOMP (SCIPnlpiComp)

SCIP_RETCODE	SCIPnlpiCreate (SCIP_NLPI *nlpi, const char name, const char description, int priority, SCIP_DECL_NLPICOPY((nlpicopy)), SCIP_DECL_NLPIFREE((nlpifree)), SCIP_DECL_NLPIGETSOLVERPOINTER((nlpigetsolverpointer)), SCIP_DECL_NLPICREATEPROBLEM((nlpicreateproblem)), SCIP_DECL_NLPIFREEPROBLEM((nlpifreeproblem)), SCIP_DECL_NLPIGETPROBLEMPOINTER((nlpigetproblempointer)), SCIP_DECL_NLPIADDVARS((nlpiaddvars)), SCIP_DECL_NLPIADDCONSTRAINTS((nlpiaddconstraints)), SCIP_DECL_NLPISETOBJECTIVE((nlpisetobjective)), SCIP_DECL_NLPICHGVARBOUNDS((nlpichgvarbounds)), SCIP_DECL_NLPICHGCONSSIDES((nlpichgconssides)), SCIP_DECL_NLPIDELVARSET((nlpidelvarset)), SCIP_DECL_NLPIDELCONSSET((nlpidelconsset)), SCIP_DECL_NLPICHGLINEARCOEFS((nlpichglinearcoefs)), SCIP_DECL_NLPICHGQUADCOEFS((nlpichgquadcoefs)), SCIP_DECL_NLPICHGEXPRTREE((nlpichgexprtree)), SCIP_DECL_NLPICHGNONLINCOEF((nlpichgnonlincoef)), SCIP_DECL_NLPICHGOBJCONSTANT((nlpichgobjconstant)), SCIP_DECL_NLPISETINITIALGUESS((nlpisetinitialguess)), SCIP_DECL_NLPISOLVE((nlpisolve)), SCIP_DECL_NLPIGETSOLSTAT((nlpigetsolstat)), SCIP_DECL_NLPIGETTERMSTAT((nlpigettermstat)), SCIP_DECL_NLPIGETSOLUTION((nlpigetsolution)), SCIP_DECL_NLPIGETSTATISTICS((nlpigetstatistics)), SCIP_DECL_NLPIGETWARMSTARTSIZE((nlpigetwarmstartsize)), SCIP_DECL_NLPIGETWARMSTARTMEMO((nlpigetwarmstartmemo)), SCIP_DECL_NLPISETWARMSTARTMEMO((nlpisetwarmstartmemo)), SCIP_DECL_NLPIGETINTPAR((nlpigetintpar)), SCIP_DECL_NLPISETINTPAR((nlpisetintpar)), SCIP_DECL_NLPIGETREALPAR((nlpigetrealpar)), SCIP_DECL_NLPISETREALPAR((nlpisetrealpar)), SCIP_DECL_NLPIGETSTRINGPAR((nlpigetstringpar)), SCIP_DECL_NLPISETSTRINGPAR((nlpisetstringpar)), SCIP_DECL_NLPISETMESSAGEHDLR((nlpisetmessagehdlr)), SCIP_NLPIDATA nlpidata)

SCIP_RETCODE	SCIPnlpiCopy (BMS_BLKMEM blkmem, SCIP_NLPI sourcenlpi, SCIP_NLPI **targetnlpi)

SCIP_RETCODE	SCIPnlpiFree (SCIP_NLPI **nlpi)

void *	SCIPnlpiGetSolverPointer (SCIP_NLPI *nlpi)

SCIP_RETCODE	SCIPnlpiCreateProblem (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, const char name)

SCIP_RETCODE	SCIPnlpiFreeProblem (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM *problem)

void *	SCIPnlpiGetProblemPointer (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem)

SCIP_RETCODE	SCIPnlpiAddVars (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int nvars, const SCIP_Real lbs, const SCIP_Real ubs, const char **varnames)

SCIP_RETCODE	SCIPnlpiAddConstraints (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int nconss, const SCIP_Real lhss, const SCIP_Real rhss, const int nlininds, int const lininds, SCIP_Real const linvals, const int nquadelems, SCIP_QUADELEM const quadelems, int const exprvaridxs, SCIP_EXPRTREE const exprtrees, const char **names)

SCIP_RETCODE	SCIPnlpiSetObjective (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int nlins, const int lininds, const SCIP_Real linvals, int nquadelems, const SCIP_QUADELEM quadelems, const int exprvaridxs, const SCIP_EXPRTREE *exprtree, const SCIP_Real constant)

SCIP_RETCODE	SCIPnlpiChgVarBounds (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int nvars, const int indices, const SCIP_Real lbs, const SCIP_Real *ubs)

SCIP_RETCODE	SCIPnlpiChgConsSides (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int nconss, const int indices, const SCIP_Real lhss, const SCIP_Real *rhss)

SCIP_RETCODE	SCIPnlpiDelVarSet (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int *dstats)

SCIP_RETCODE	SCIPnlpiDelConsSet (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int *dstats)

SCIP_RETCODE	SCIPnlpiChgLinearCoefs (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, const int idx, int nvals, const int varidxs, const SCIP_Real vals)

SCIP_RETCODE	SCIPnlpiChgQuadCoefs (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int idx, int nquadelems, const SCIP_QUADELEM *quadelems)

SCIP_RETCODE	SCIPnlpiChgExprtree (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int idxcons, const int exprvaridxs, SCIP_EXPRTREE exprtree)

SCIP_RETCODE	SCIPnlpiChgNonlinCoef (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, int considx, int paramidx, SCIP_Real value)

SCIP_RETCODE	SCIPnlpiChgObjConstant (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_Real objconstant)

SCIP_RETCODE	SCIPnlpiSetInitialGuess (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_Real primalvalues, SCIP_Real consdualvalues, SCIP_Real varlbdualvalues, SCIP_Real varubdualvalues)

SCIP_RETCODE	SCIPnlpiSolve (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem)

SCIP_NLPSOLSTAT	SCIPnlpiGetSolstat (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem)

SCIP_NLPTERMSTAT	SCIPnlpiGetTermstat (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem)

SCIP_RETCODE	SCIPnlpiGetSolution (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_Real primalvalues, SCIP_Real consdualvalues, SCIP_Real varlbdualvalues, SCIP_Real varubdualvalues)

SCIP_RETCODE	SCIPnlpiGetStatistics (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPSTATISTICS *statistics)

SCIP_RETCODE	SCIPnlpiGetWarmstartSize (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, size_t *size)

SCIP_RETCODE	SCIPnlpiGetWarmstartMemo (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, void *buffer)

SCIP_RETCODE	SCIPnlpiSetWarmstartMemo (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, void *buffer)

Parameter Methods
SCIP_RETCODE	SCIPnlpiGetIntPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, int *ival)

SCIP_RETCODE	SCIPnlpiSetIntPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, int ival)

SCIP_RETCODE	SCIPnlpiGetRealPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, SCIP_Real *dval)

SCIP_RETCODE	SCIPnlpiSetRealPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, SCIP_Real dval)

SCIP_RETCODE	SCIPnlpiGetStringPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, const char **sval)

SCIP_RETCODE	SCIPnlpiSetStringPar (SCIP_NLPI nlpi, SCIP_NLPIPROBLEM problem, SCIP_NLPPARAM type, const char *sval)

SCIP_RETCODE	SCIPnlpiSetMessageHdlr (SCIP_NLPI nlpi, SCIP_MESSAGEHDLR messagehdlr)

SCIP_NLPIDATA *	SCIPnlpiGetData (SCIP_NLPI *nlpi)

const char *	SCIPnlpiGetName (SCIP_NLPI *nlpi)

const char *	SCIPnlpiGetDesc (SCIP_NLPI *nlpi)

int	SCIPnlpiGetPriority (SCIP_NLPI *nlpi)

void	SCIPnlpiSetPriority (SCIP_NLPI *nlpi, int priority)

SCIP_RETCODE	SCIPnlpStatisticsCreate (SCIP_NLPSTATISTICS **statistics)

void	SCIPnlpStatisticsFree (SCIP_NLPSTATISTICS **statistics)

int	SCIPnlpStatisticsGetNIterations (SCIP_NLPSTATISTICS *statistics)

SCIP_Real	SCIPnlpStatisticsGetTotalTime (SCIP_NLPSTATISTICS *statistics)

void	SCIPnlpStatisticsSetNIterations (SCIP_NLPSTATISTICS *statistics, int niterations)

void	SCIPnlpStatisticsSetTotalTime (SCIP_NLPSTATISTICS *statistics, SCIP_Real totaltime)

Function Documentation

SCIP_DECL_SORTPTRCOMP ( SCIPnlpiComp )

compares two NLPIs w.r.t. their priority

Definition at line 34 of file nlpi.c.

SCIP_RETCODE SCIPnlpiCreate	(	SCIP_NLPI **	nlpi,
		const char *	name,
		const char *	description,
		int	priority,
		SCIP_DECL_NLPICOPY((*nlpicopy))	,
		SCIP_DECL_NLPIFREE((*nlpifree))	,
		SCIP_DECL_NLPIGETSOLVERPOINTER((*nlpigetsolverpointer))	,
		SCIP_DECL_NLPICREATEPROBLEM((*nlpicreateproblem))	,
		SCIP_DECL_NLPIFREEPROBLEM((*nlpifreeproblem))	,
		SCIP_DECL_NLPIGETPROBLEMPOINTER((*nlpigetproblempointer))	,
		SCIP_DECL_NLPIADDVARS((*nlpiaddvars))	,
		SCIP_DECL_NLPIADDCONSTRAINTS((*nlpiaddconstraints))	,
		SCIP_DECL_NLPISETOBJECTIVE((*nlpisetobjective))	,
		SCIP_DECL_NLPICHGVARBOUNDS((*nlpichgvarbounds))	,
		SCIP_DECL_NLPICHGCONSSIDES((*nlpichgconssides))	,
		SCIP_DECL_NLPIDELVARSET((*nlpidelvarset))	,
		SCIP_DECL_NLPIDELCONSSET((*nlpidelconsset))	,
		SCIP_DECL_NLPICHGLINEARCOEFS((*nlpichglinearcoefs))	,
		SCIP_DECL_NLPICHGQUADCOEFS((*nlpichgquadcoefs))	,
		SCIP_DECL_NLPICHGEXPRTREE((*nlpichgexprtree))	,
		SCIP_DECL_NLPICHGNONLINCOEF((*nlpichgnonlincoef))	,
		SCIP_DECL_NLPICHGOBJCONSTANT((*nlpichgobjconstant))	,
		SCIP_DECL_NLPISETINITIALGUESS((*nlpisetinitialguess))	,
		SCIP_DECL_NLPISOLVE((*nlpisolve))	,
		SCIP_DECL_NLPIGETSOLSTAT((*nlpigetsolstat))	,
		SCIP_DECL_NLPIGETTERMSTAT((*nlpigettermstat))	,
		SCIP_DECL_NLPIGETSOLUTION((*nlpigetsolution))	,
		SCIP_DECL_NLPIGETSTATISTICS((*nlpigetstatistics))	,
		SCIP_DECL_NLPIGETWARMSTARTSIZE((*nlpigetwarmstartsize))	,
		SCIP_DECL_NLPIGETWARMSTARTMEMO((*nlpigetwarmstartmemo))	,
		SCIP_DECL_NLPISETWARMSTARTMEMO((*nlpisetwarmstartmemo))	,
		SCIP_DECL_NLPIGETINTPAR((*nlpigetintpar))	,
		SCIP_DECL_NLPISETINTPAR((*nlpisetintpar))	,
		SCIP_DECL_NLPIGETREALPAR((*nlpigetrealpar))	,
		SCIP_DECL_NLPISETREALPAR((*nlpisetrealpar))	,
		SCIP_DECL_NLPIGETSTRINGPAR((*nlpigetstringpar))	,
		SCIP_DECL_NLPISETSTRINGPAR((*nlpisetstringpar))	,
		SCIP_DECL_NLPISETMESSAGEHDLR((*nlpisetmessagehdlr))	,
		SCIP_NLPIDATA *	nlpidata
	)

creates an NLP solver interface

Parameters

nlpi	pointer to NLP interface data structure
name	name of NLP interface
description	description of NLP interface
priority	priority of NLP interface
nlpidata	NLP interface local data

Definition at line 40 of file nlpi.c.

References BMSallocMemory, BMSduplicateMemoryArray, NULL, SCIP_ALLOC, and SCIP_OKAY.

Referenced by SCIPcreateNlpSolverIpopt().

SCIP_RETCODE SCIPnlpiCopy	(	BMS_BLKMEM *	blkmem,
		SCIP_NLPI *	sourcenlpi,
		SCIP_NLPI **	targetnlpi
	)

copies an NLPI

Parameters

blkmem	block memory in target SCIP
sourcenlpi	pointer to NLPI data structure to copy
targetnlpi	buffer to store pointer to copied NLPI data structure

Definition at line 165 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPsetCopyPlugins().

SCIP_RETCODE SCIPnlpiFree ( SCIP_NLPI ** nlpi )

frees NLPI user data

Parameters

nlpi	pointer to NLPI data structure

Definition at line 181 of file nlpi.c.

References BMSfreeMemory, BMSfreeMemoryArray, NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPsetFree().

void* SCIPnlpiGetSolverPointer ( SCIP_NLPI * nlpi )

gets pointer for NLP solver

Returns: void pointer to solver

Parameters

nlpi	pointer to NLPI datastructure

Definition at line 201 of file nlpi.c.

References NULL.

SCIP_RETCODE SCIPnlpiCreateProblem	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM **	problem,
		const char *	name
	)

creates a problem instance

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to store problem data
name	name of problem, can be NULL

Definition at line 211 of file nlpi.c.

References NULL.

Referenced by SCIPnlpCreate().

SCIP_RETCODE SCIPnlpiFreeProblem	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM **	problem
	)

frees a problem instance

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer where problem data is stored

Definition at line 224 of file nlpi.c.

References NULL.

Referenced by SCIPnlpFree().

void* SCIPnlpiGetProblemPointer	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem
	)

gets pointer to solver-internal problem instance

Returns: void pointer to problem instance

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer where problem data is stored

Definition at line 238 of file nlpi.c.

References NULL.

SCIP_RETCODE SCIPnlpiAddVars	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	nvars,
		const SCIP_Real *	lbs,
		const SCIP_Real *	ubs,
		const char **	varnames
	)

add variables to nlpi

Parameters

nlpi	pointer to NLPI data structure
problem	pointer to problem data structure
nvars	number of variables
lbs	lower bounds of variables, can be NULL if -infinity
ubs	ubs upper bounds of variables, can be NULL if +infinity
varnames	varnames names of variables, can be NULL

Definition at line 250 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpFlushVarAdditions().

SCIP_RETCODE SCIPnlpiAddConstraints	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	nconss,
		const SCIP_Real *	lhss,
		const SCIP_Real *	rhss,
		const int *	nlininds,
		int const	lininds,
		SCIP_Real const	linvals,
		const int *	nquadelems,
		SCIP_QUADELEM const	quadelems,
		int const	exprvaridxs,
		SCIP_EXPRTREE const	exprtrees,
		const char **	names
	)

add constraints to nlpi

Parameters

nlpi	pointer to NLPI data structure
problem	pointer to problem data structure
nconss	number of added constraints
lhss	left hand sides of constraints
rhss	right hand sides of constraints
nlininds	number of linear coefficients for each constraint, may be NULL in case of no linear part
lininds	indices of variables for linear coefficients for each constraint, may be NULL in case of no linear part
linvals	values of linear coefficient for each constraint, may be NULL in case of no linear part
nquadelems	number of elements in matrix of quadratic part for each constraint, may be NULL in case of no quadratic part in any constraint
quadelems	quadratic elements specifying quadratic part for each constraint, entry of array may be NULL in case of no quadratic part, may be NULL in case of no quadratic part in any constraint
exprvaridxs	indices of variables in expression tree, maps variable indices in expression tree to indices in nlp, entry of array may be NULL in case of no expression tree, may be NULL in case of no expression tree in any constraint
exprtrees	exprtrees expression tree for nonquadratic part of constraints, entry of array may be NULL in case of no nonquadratic part, may be NULL in case of no nonquadratic part in any constraint
names	names of constraints, may be NULL or entries may be NULL

Definition at line 268 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpFlushNlRowAdditions(), SCIPaddToNlpiProblemQuadratic(), and SCIPaddToNlpiProblemSOC().

SCIP_RETCODE SCIPnlpiSetObjective	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	nlins,
		const int *	lininds,
		const SCIP_Real *	linvals,
		int	nquadelems,
		const SCIP_QUADELEM *	quadelems,
		const int *	exprvaridxs,
		const SCIP_EXPRTREE *	exprtree,
		const SCIP_Real	constant
	)

sets or overwrites objective, a minimization problem is expected

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
nlins	number of linear variables
lininds	variable indices, may be NULL in case of no linear part
linvals	coefficient values, may be NULL in case of no linear part
nquadelems	number of entries in matrix of quadratic part
quadelems	entries in matrix of quadratic part, may be NULL in case of no quadratic part
exprvaridxs	indices of variables in expression tree, maps variable indices in expression tree to indices in nlp, may be NULL in case of no expression tree
exprtree	expression tree for nonquadratic part of objective function, may be NULL in case of no nonquadratic part
constant	objective value offset

Definition at line 300 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpFlushObjective().

SCIP_RETCODE SCIPnlpiChgVarBounds	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	nvars,
		const int *	indices,
		const SCIP_Real *	lbs,
		const SCIP_Real *	ubs
	)

change variable bounds

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
nvars	number of variables to change bounds
indices	indices of variables to change bounds
lbs	new lower bounds
ubs	new upper bounds

Definition at line 325 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpUpdateVarBounds(), SCIPnlpChgVarBoundsDive(), SCIPnlpChgVarsBoundsDive(), and SCIPnlpEndDive().

SCIP_RETCODE SCIPnlpiChgConsSides	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	nconss,
		const int *	indices,
		const SCIP_Real *	lhss,
		const SCIP_Real *	rhss
	)

change constraint bounds

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
nconss	number of constraints to change sides
indices	indices of constraints to change sides
lhss	new left hand sides
rhss	new right hand sides

Definition at line 343 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlrowConstantChanged(), and nlrowSideChanged().

SCIP_RETCODE SCIPnlpiDelVarSet	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int *	dstats
	)

delete a set of variables

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
dstats	deletion status of vars; 1 if var should be deleted, 0 if not; afterwards -1 if var was deleted

Definition at line 361 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpFlushVarDeletions().

SCIP_RETCODE SCIPnlpiDelConsSet	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int *	dstats
	)

delete a set of constraints

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
dstats	deletion status of rows; 1 if row should be deleted, 0 if not; afterwards -1 if row was deleted

Definition at line 377 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpFlushNlRowDeletions().

SCIP_RETCODE SCIPnlpiChgLinearCoefs	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		const int	idx,
		int	nvals,
		const int *	varidxs,
		const SCIP_Real *	vals
	)

changes or adds linear coefficients in a constraint or objective

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
idx	index of constraint or -1 for objective
nvals	number of values in linear constraint
varidxs	indices of variable
vals	new values for coefficient

Definition at line 393 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpUpdateObjCoef(), nlrowLinearCoefChanged(), and SCIPnlpChgVarObjDive().

SCIP_RETCODE SCIPnlpiChgQuadCoefs	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	idx,
		int	nquadelems,
		const SCIP_QUADELEM *	quadelems
	)

changes or adds coefficients in the quadratic part of a constraint or objective

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
idx	index of constraint or -1 for objective
nquadelems	number of entries in quadratic constraint to change
quadelems	new elements in quadratic matrix (replacing already existing ones or adding new ones)

Definition at line 411 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlrowQuadElemChanged().

SCIP_RETCODE SCIPnlpiChgExprtree	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	idxcons,
		const int *	exprvaridxs,
		SCIP_EXPRTREE *	exprtree
	)

change the expression tree in the nonlinear part

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
idxcons	index of constraint or -1 for objective
exprvaridxs	indices of variables in expression tree, maps variable indices in expression tree to indices in nlp, or NULL
exprtree	new expression tree, or NULL for no tree

Definition at line 428 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlrowExprtreeChanged().

SCIP_RETCODE SCIPnlpiChgNonlinCoef	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		int	considx,
		int	paramidx,
		SCIP_Real	value
	)

change the value of one parameter in the nonlinear part

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
considx	index of constraint or -1 for objective
paramidx	index of parameter
value	new value for nonlinear parameter

Definition at line 445 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlrowExprtreeParamChanged().

SCIP_RETCODE SCIPnlpiChgObjConstant	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_Real	objconstant
	)

change the constant offset in the objective

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
objconstant	new value for objective constant

Definition at line 462 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

SCIP_RETCODE SCIPnlpiSetInitialGuess	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_Real *	primalvalues,
		SCIP_Real *	consdualvalues,
		SCIP_Real *	varlbdualvalues,
		SCIP_Real *	varubdualvalues
	)

sets initial guess for primal variables

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
primalvalues	initial primal values for variables, or NULL to clear previous values
consdualvalues	initial dual values for constraints, or NULL to clear previous values
varlbdualvalues	initial dual values for variable lower bounds, or NULL to clear previous values
varubdualvalues	initial dual values for variable upper bounds, or NULL to clear previous values

Definition at line 477 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpSolve(), and SCIPnlpSetInitialGuess().

SCIP_RETCODE SCIPnlpiSolve	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem
	)

tries to solve NLP

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure

Definition at line 495 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpSolve().

SCIP_NLPSOLSTAT SCIPnlpiGetSolstat	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem
	)

gives solution status, return: Solution Status

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure

Definition at line 509 of file nlpi.c.

References NULL.

Referenced by nlpSolve().

SCIP_NLPTERMSTAT SCIPnlpiGetTermstat	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem
	)

gives termination reason; return: Termination Status

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure

Definition at line 521 of file nlpi.c.

References NULL.

Referenced by nlpSolve().

SCIP_RETCODE SCIPnlpiGetSolution	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_Real **	primalvalues,
		SCIP_Real **	consdualvalues,
		SCIP_Real **	varlbdualvalues,
		SCIP_Real **	varubdualvalues
	)

gives primal and dual solution for a ranged constraint, the dual variable is positive if the right hand side is active and negative if the left hand side is active

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
primalvalues	buffer to store pointer to array to primal values, or NULL if not needed
consdualvalues	buffer to store pointer to array to dual values of constraints, or NULL if not needed
varlbdualvalues	buffer to store pointer to array to dual values of variable lower bounds, or NULL if not needed
varubdualvalues	buffer to store pointer to array to dual values of variable lower bounds, or NULL if not needed

Definition at line 535 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by nlpSolve().

SCIP_RETCODE SCIPnlpiGetStatistics	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPSTATISTICS *	statistics
	)

gives solve statistics

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
statistics	pointer to store statistics

Definition at line 553 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPnlpGetStatistics().

SCIP_RETCODE SCIPnlpiGetWarmstartSize	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		size_t *	size
	)

gives required size of a buffer to store a warmstart object

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
size	pointer to store required size for warmstart buffer

Definition at line 568 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

SCIP_RETCODE SCIPnlpiGetWarmstartMemo	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		void *	buffer
	)

stores warmstart information in buffer

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
buffer	memory to store warmstart information

Definition at line 583 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

SCIP_RETCODE SCIPnlpiSetWarmstartMemo	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		void *	buffer
	)

sets warmstart information in solver

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
buffer	warmstart information

Definition at line 598 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

SCIP_RETCODE SCIPnlpiGetIntPar	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPPARAM	type,
		int *	ival
	)

gets integer parameter of NLP

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
type	parameter number
ival	pointer to store the parameter value

Definition at line 616 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPnlpGetIntPar().

SCIP_RETCODE SCIPnlpiSetIntPar	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPPARAM	type,
		int	ival
	)

sets integer parameter of NLP

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
type	parameter number
ival	parameter value

Definition at line 633 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPnlpSetIntPar().

SCIP_RETCODE SCIPnlpiGetRealPar	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPPARAM	type,
		SCIP_Real *	dval
	)

gets floating point parameter of NLP if problem is NULL and type == SCIP_NLPPAR_INFINITY, then gets solver-wide value for infinity

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure, can be NULL only if type == SCIP_NLPPAR_INFINITY
type	parameter number
dval	pointer to store the parameter value

Definition at line 650 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPnlpGetRealPar().

SCIP_RETCODE SCIPnlpiSetRealPar	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPPARAM	type,
		SCIP_Real	dval
	)

sets floating point parameter of NLP if problem is NULL and type == SCIP_NLPPAR_INFINITY, then sets solver-wide value for infinity

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure, can be NULL only if type == SCIP_NLPPAR_INFINITY
type	parameter number
dval	parameter value

Definition at line 668 of file nlpi.c.

References NULL, SCIP_CALL, SCIP_NLPPAR_INFINITY, and SCIP_OKAY.

Referenced by SCIP_DECL_NLPICOPY(), and SCIPnlpSetRealPar().

SCIP_RETCODE SCIPnlpiGetStringPar	(	SCIP_NLPI *	nlpi,
		SCIP_NLPIPROBLEM *	problem,
		SCIP_NLPPARAM	type,
		const char **	sval
	)

gets string parameter of NLP

Parameters

nlpi	pointer to NLPI datastructure
problem	pointer to problem data structure
type	parameter number
sval	pointer to store the parameter value, the user must not modify the string

Definition at line 684 of file nlpi.c.

References NULL, SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPnlpGetStringPar().