Detailed Description

NLP representation used by various NLP solver interface implementations.

Typedefs
typedef struct SCIP_NlpiOracle	SCIP_NLPIORACLE

Functions
SCIP_RETCODE	SCIPnlpiOracleCreate (SCIP scip, SCIP_NLPIORACLE *oracle)

SCIP_RETCODE	SCIPnlpiOracleFree (SCIP scip, SCIP_NLPIORACLE *oracle)

SCIP_RETCODE	SCIPnlpiOracleSetProblemName (SCIP scip, SCIP_NLPIORACLE oracle, const char *name)

const char *	SCIPnlpiOracleGetProblemName (SCIP_NLPIORACLE *oracle)

SCIP_RETCODE	SCIPnlpiOracleAddVars (SCIP scip, SCIP_NLPIORACLE oracle, int nvars, const SCIP_Real lbs, const SCIP_Real ubs, const char **varnames)

SCIP_RETCODE	SCIPnlpiOracleAddConstraints (SCIP scip, SCIP_NLPIORACLE oracle, int nconss, const SCIP_Real lhss, const SCIP_Real rhss, const int nlininds, int const lininds, SCIP_Real const linvals, SCIP_EXPR exprs, const char *consnames)

SCIP_RETCODE	SCIPnlpiOracleSetObjective (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real constant, int nlin, const int lininds, const SCIP_Real linvals, SCIP_EXPR *expr)

SCIP_RETCODE	SCIPnlpiOracleChgVarBounds (SCIP scip, SCIP_NLPIORACLE oracle, int nvars, const int indices, const SCIP_Real lbs, const SCIP_Real *ubs)

SCIP_RETCODE	SCIPnlpiOracleChgConsSides (SCIP scip, SCIP_NLPIORACLE oracle, int nconss, const int indices, const SCIP_Real lhss, const SCIP_Real *rhss)

SCIP_RETCODE	SCIPnlpiOracleDelVarSet (SCIP scip, SCIP_NLPIORACLE oracle, int *delstats)

SCIP_RETCODE	SCIPnlpiOracleDelConsSet (SCIP scip, SCIP_NLPIORACLE oracle, int *delstats)

SCIP_RETCODE	SCIPnlpiOracleChgLinearCoefs (SCIP scip, SCIP_NLPIORACLE oracle, int considx, int nentries, const int varidxs, const SCIP_Real newcoefs)

SCIP_RETCODE	SCIPnlpiOracleChgExpr (SCIP scip, SCIP_NLPIORACLE oracle, int considx, SCIP_EXPR *expr)

SCIP_RETCODE	SCIPnlpiOracleChgObjConstant (SCIP scip, SCIP_NLPIORACLE oracle, SCIP_Real objconstant)

int	SCIPnlpiOracleGetNVars (SCIP_NLPIORACLE *oracle)

int	SCIPnlpiOracleGetNConstraints (SCIP_NLPIORACLE *oracle)

const SCIP_Real *	SCIPnlpiOracleGetVarLbs (SCIP_NLPIORACLE *oracle)

const SCIP_Real *	SCIPnlpiOracleGetVarUbs (SCIP_NLPIORACLE *oracle)

char **	SCIPnlpiOracleGetVarNames (SCIP_NLPIORACLE *oracle)

SCIP_Bool	SCIPnlpiOracleIsVarNonlinear (SCIP scip, SCIP_NLPIORACLE oracle, int varidx)

void	SCIPnlpiOracleGetVarCounts (SCIP scip, SCIP_NLPIORACLE oracle, const int lincounts, const int nlcounts)

SCIP_Real	SCIPnlpiOracleGetObjectiveConstant (SCIP_NLPIORACLE *oracle)

SCIP_Real	SCIPnlpiOracleGetConstraintLhs (SCIP_NLPIORACLE *oracle, int considx)

SCIP_Real	SCIPnlpiOracleGetConstraintRhs (SCIP_NLPIORACLE *oracle, int considx)

char *	SCIPnlpiOracleGetConstraintName (SCIP_NLPIORACLE *oracle, int considx)

SCIP_Real	SCIPnlpiOracleGetConstraintLinearCoef (SCIP_NLPIORACLE *oracle, int considx, int varpos)

SCIP_Bool	SCIPnlpiOracleIsConstraintNonlinear (SCIP_NLPIORACLE *oracle, int considx)

SCIP_EXPRINTCAPABILITY	SCIPnlpiOracleGetEvalCapability (SCIP scip, SCIP_NLPIORACLE oracle)

SCIP_RETCODE	SCIPnlpiOracleEvalObjectiveValue (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real x, SCIP_Real objval)

SCIP_RETCODE	SCIPnlpiOracleEvalConstraintValue (SCIP scip, SCIP_NLPIORACLE oracle, int considx, const SCIP_Real x, SCIP_Real conval)

SCIP_RETCODE	SCIPnlpiOracleEvalConstraintValues (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real x, SCIP_Real convals)

SCIP_RETCODE	SCIPnlpiOracleEvalObjectiveInterval (SCIP scip, SCIP_NLPIORACLE oracle, SCIP_Real infinity, const SCIP_Real xmin, const SCIP_Real xmax, SCIP_Real objmin, SCIP_Real objmax)

SCIP_RETCODE	SCIPnlpiOracleEvalConstraintInterval (SCIP scip, SCIP_NLPIORACLE oracle, SCIP_Real infinity, int considx, const SCIP_Real xmin, const SCIP_Real xmax, SCIP_Real conmin, SCIP_Real conmax)

SCIP_RETCODE	SCIPnlpiOracleEvalObjectiveGradient (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real x, SCIP_Bool isnewx, SCIP_Real objval, SCIP_Real *objgrad)

SCIP_RETCODE	SCIPnlpiOracleEvalConstraintGradient (SCIP scip, SCIP_NLPIORACLE oracle, const int considx, const SCIP_Real x, SCIP_Bool isnewx, SCIP_Real conval, SCIP_Real *congrad)

SCIP_RETCODE	SCIPnlpiOracleGetJacobianRowSparsity (SCIP scip, SCIP_NLPIORACLE oracle, const int rowoffsets, const int cols, const SCIP_Bool *colnlflags, int nnlnz)

SCIP_RETCODE	SCIPnlpiOracleGetJacobianColSparsity (SCIP scip, SCIP_NLPIORACLE oracle, const int coloffsets, const int rows, const SCIP_Bool *rownlflags, int nnlnz)

SCIP_RETCODE	SCIPnlpiOracleGetObjGradientNnz (SCIP scip, SCIP_NLPIORACLE oracle, const int nz, const SCIP_Bool nlnz, int nnz, int nnlnz)

SCIP_RETCODE	SCIPnlpiOracleEvalJacobian (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real x, SCIP_Bool isnewx, SCIP_Real convals, SCIP_Real *jacobi)

SCIP_RETCODE	SCIPnlpiOracleGetHessianLagSparsity (SCIP scip, SCIP_NLPIORACLE oracle, const int offset, const int allnz, SCIP_Bool colwise)

SCIP_RETCODE	SCIPnlpiOracleEvalHessianLag (SCIP scip, SCIP_NLPIORACLE oracle, const SCIP_Real x, SCIP_Bool isnewx_obj, SCIP_Bool isnewx_cons, SCIP_Real objfactor, const SCIP_Real lambda, SCIP_Real *hessian, SCIP_Bool colwise)

SCIP_RETCODE	SCIPnlpiOracleResetEvalTime (SCIP scip, SCIP_NLPIORACLE oracle)

SCIP_Real	SCIPnlpiOracleGetEvalTime (SCIP scip, SCIP_NLPIORACLE oracle)

SCIP_RETCODE	SCIPnlpiOraclePrintProblem (SCIP scip, SCIP_NLPIORACLE oracle, FILE *file)

SCIP_RETCODE	SCIPnlpiOraclePrintProblemGams (SCIP scip, SCIP_NLPIORACLE oracle, SCIP_Real initval, FILE file)

Typedef Documentation

◆ SCIP_NLPIORACLE

typedef struct SCIP_NlpiOracle SCIP_NLPIORACLE

NLPI oracle data structure

Definition at line 51 of file nlpioracle.h.

Function Documentation

◆ SCIPnlpiOracleCreate()

SCIP_RETCODE SCIPnlpiOracleCreate	(	SCIP *	scip,
		SCIP_NLPIORACLE **	oracle
	)

creates an NLPIORACLE data structure

Parameters

scip	SCIP data structure
oracle	pointer to store NLPIORACLE data structure

Definition at line 1297 of file nlpioracle.c.

References BMSclearMemory, createConstraint(), FALSE, NULL, SCIP_NlpiOracle::objective, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocMemory, SCIPcreateClock(), SCIPdebugMessage, SCIPexprintCreate(), SCIPexprintGetName(), SCIPgetBoolParam(), and SCIPsetClockEnabled().

Referenced by SCIP_DECL_NLPICREATEPROBLEM().

◆ SCIPnlpiOracleFree()

SCIP_RETCODE SCIPnlpiOracleFree	(	SCIP *	scip,
		SCIP_NLPIORACLE **	oracle
	)

frees an NLPIORACLE data structure

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure

Definition at line 1327 of file nlpioracle.c.

References BMSfreeMemory, FALSE, freeConstraint(), freeConstraints(), freeVariables(), invalidateHessianLagSparsity(), invalidateJacobiSparsity(), NULL, SCIP_NlpiOracle::objective, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPexprintFree(), SCIPfreeClock(), and SCIPnlpiOracleSetProblemName().

Referenced by SCIP_DECL_NLPIFREEPROBLEM().

◆ SCIPnlpiOracleSetProblemName()

SCIP_RETCODE SCIPnlpiOracleSetProblemName	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const char *	name
	)

sets the problem name (used for printing)

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
name	name of problem

Definition at line 1359 of file nlpioracle.c.

References SCIP_NlpiOracle::name, NULL, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPduplicateBlockMemoryArray, and SCIPfreeBlockMemoryArray.

Referenced by SCIP_DECL_NLPICREATEPROBLEM(), and SCIPnlpiOracleFree().

◆ SCIPnlpiOracleGetProblemName()

const char * SCIPnlpiOracleGetProblemName ( SCIP_NLPIORACLE * oracle )

gets the problem name, or NULL if none set

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 1383 of file nlpioracle.c.

References SCIP_NlpiOracle::name, NULL, and SCIPdebugMessage.

Referenced by SCIP_DECL_NLPISOLVE().

◆ SCIPnlpiOracleAddVars()

SCIP_RETCODE SCIPnlpiOracleAddVars	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	nvars,
		const SCIP_Real *	lbs,
		const SCIP_Real *	ubs,
		const char **	varnames
	)

adds variables

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
nvars	number of variables to add
lbs	array with lower bounds of new variables, or NULL if all -infinity
ubs	array with upper bounds of new variables, or NULL if all +infinity
varnames	array with names of new variables, or NULL if no names should be stored

Definition at line 1395 of file nlpioracle.c.

References BMSclearMemoryArray, BMScopyMemoryArray, ensureVarsSize(), EPSEQ, invalidateHessianLagSparsity(), NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIP_DEFAULT_EPSILON, SCIP_OKAY, SCIPallocClearBlockMemoryArray, SCIPdebugMessage, SCIPduplicateBlockMemoryArray, SCIPinfinity(), SCIP_NlpiOracle::varlbs, SCIP_NlpiOracle::varlincount, SCIP_NlpiOracle::varnames, SCIP_NlpiOracle::varnlcount, SCIP_NlpiOracle::varssize, and SCIP_NlpiOracle::varubs.

Referenced by SCIP_DECL_NLPIADDVARS().

◆ SCIPnlpiOracleAddConstraints()

SCIP_RETCODE SCIPnlpiOracleAddConstraints	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	nconss,
		const SCIP_Real *	lhss,
		const SCIP_Real *	rhss,
		const int *	nlininds,
		int const	lininds,
		SCIP_Real const	linvals,
		SCIP_EXPR **	exprs,
		const char **	consnames
	)

adds constraints

linear coefficients: row(=constraint) oriented matrix; quadratic coefficients: row oriented matrix for each constraint

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
nconss	number of constraints to add
lhss	array with left-hand sides of constraints, or NULL if all -infinity
rhss	array with right-hand sides of constraints, or NULL if all +infinity
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
exprs	NULL if no nonlinear parts, otherwise exprs[.] gives nonlinear part, or NULL if no nonlinear part in this constraint
consnames	names of new constraints, or NULL if no names should be stored

Definition at line 1481 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, createConstraint(), ensureConssSize(), SCIP_NlpiOracleCons::expr, FALSE, invalidateHessianLagSparsity(), invalidateJacobiSparsity(), SCIP_NlpiOracle::nconss, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPinfinity(), and TRUE.

Referenced by SCIP_DECL_NLPIADDCONSTRAINTS().

◆ SCIPnlpiOracleSetObjective()

SCIP_RETCODE SCIPnlpiOracleSetObjective	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real	constant,
		int	nlin,
		const int *	lininds,
		const SCIP_Real *	linvals,
		SCIP_EXPR *	expr
	)

sets or overwrites objective, a minimization problem is expected

May change sparsity pattern.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
constant	constant part of objective
nlin	number of linear variable coefficients
lininds	indices of linear variables, or NULL if no linear part
linvals	coefficients of linear variables, or NULL if no linear part
expr	expression of nonlinear part, or NULL if no nonlinear part

Definition at line 1542 of file nlpioracle.c.

References createConstraint(), SCIP_NlpiOracleCons::expr, freeConstraint(), invalidateHessianLagSparsity(), NULL, SCIP_NlpiOracle::objective, REALABS, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPisInfinity(), and TRUE.

Referenced by SCIP_DECL_NLPISETOBJECTIVE().

◆ SCIPnlpiOracleChgVarBounds()

SCIP_RETCODE SCIPnlpiOracleChgVarBounds	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	nvars,
		const int *	indices,
		const SCIP_Real *	lbs,
		const SCIP_Real *	ubs
	)

change variable bounds

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
nvars	number of variables to change bounds
indices	indices of variables to change bounds
lbs	new lower bounds, or NULL if all should be -infty
ubs	new upper bounds, or NULL if all should be +infty

Definition at line 1571 of file nlpioracle.c.

References EPSEQ, NULL, SCIP_NlpiOracle::nvars, SCIP_DEFAULT_EPSILON, SCIP_OKAY, SCIPdebugMessage, SCIPinfinity(), SCIP_NlpiOracle::varlbs, and SCIP_NlpiOracle::varubs.

Referenced by SCIP_DECL_NLPICHGVARBOUNDS().

◆ SCIPnlpiOracleChgConsSides()

SCIP_RETCODE SCIPnlpiOracleChgConsSides	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	nconss,
		const int *	indices,
		const SCIP_Real *	lhss,
		const SCIP_Real *	rhss
	)

change constraint sides

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
nconss	number of constraints to change bounds
indices	indices of constraints to change bounds
lhss	new left-hand sides, or NULL if all should be -infty
rhss	new right-hand sides, or NULL if all should be +infty

Definition at line 1608 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, EPSEQ, SCIP_NlpiOracleCons::lhs, SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracleCons::rhs, SCIP_DEFAULT_EPSILON, SCIP_OKAY, SCIPdebugMessage, and SCIPinfinity().

Referenced by SCIP_DECL_NLPICHGCONSSIDES().

◆ SCIPnlpiOracleDelVarSet()

SCIP_RETCODE SCIPnlpiOracleDelVarSet	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int *	delstats
	)

deletes a set of variables

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
delstats	deletion status of vars in input (1 if var should be deleted, 0 if not); new position of var in output (-1 if var was deleted)

Definition at line 1643 of file nlpioracle.c.

References clearDeletedLinearElements(), SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::exprinterpreter, FALSE, freeVariables(), invalidateHessianLagSparsity(), invalidateJacobiSparsity(), SCIP_NlpiOracleCons::lincoefs, SCIP_NlpiOracleCons::linidxs, mapIndices(), moveVariable(), SCIP_NlpiOracle::nconss, SCIP_NlpiOracleCons::nlinidxs, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_Bool, SCIP_CALL, SCIP_EXPRITER_DFS, SCIP_OKAY, SCIPcreateExpriter(), SCIPdebugMessage, SCIPexprintFreeData(), SCIPexpriterGetNext(), SCIPexpriterInit(), SCIPexpriterIsEnd(), SCIPfreeBlockMemoryArray, SCIPfreeExpriter(), SCIPgetIndexExprVaridx(), SCIPisExprVaridx(), SCIPreleaseExpr(), SCIPsetIndexExprVaridx(), SCIPsortIntReal(), TRUE, and SCIP_NlpiOracle::varnames.

Referenced by SCIP_DECL_NLPIDELVARSET().

◆ SCIPnlpiOracleDelConsSet()

SCIP_RETCODE SCIPnlpiOracleDelConsSet	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int *	delstats
	)

deletes a set of constraints

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
delstats	array with deletion status of rows in input (1 if row should be deleted, 0 if not); new position of row in output (-1 if row was deleted)

Definition at line 1785 of file nlpioracle.c.

References BMSclearMemoryArray, SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, freeConstraint(), freeConstraints(), invalidateHessianLagSparsity(), invalidateJacobiSparsity(), SCIP_NlpiOracleCons::linidxs, SCIP_NlpiOracle::nconss, SCIP_NlpiOracleCons::nlinidxs, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, TRUE, updateVariableCounts(), SCIP_NlpiOracle::varlincount, and SCIP_NlpiOracle::varnlcount.

Referenced by SCIP_DECL_NLPIDELCONSSET().

◆ SCIPnlpiOracleChgLinearCoefs()

SCIP_RETCODE SCIPnlpiOracleChgLinearCoefs	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	considx,
		int	nentries,
		const int *	varidxs,
		const SCIP_Real *	newcoefs
	)

changes (or adds) linear coefficients in one constraint or objective

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
considx	index of constraint where linear coefficients should be changed, or -1 for objective
nentries	number of coefficients to change
varidxs	array with indices of variables which coefficients should be changed
newcoefs	array with new coefficients of variables

Definition at line 1871 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, ensureConsLinSize(), FALSE, invalidateJacobiSparsity(), SCIP_NlpiOracleCons::lincoefs, SCIP_NlpiOracleCons::linidxs, SCIP_NlpiOracleCons::linsize, SCIP_NlpiOracleCons::nlinidxs, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPduplicateBlockMemoryArray, SCIPsortedvecFindInt(), sortLinearCoefficients(), TRUE, updateVariableCounts(), and SCIP_NlpiOracle::varlincount.

Referenced by SCIP_DECL_NLPICHGLINEARCOEFS().

◆ SCIPnlpiOracleChgExpr()

SCIP_RETCODE SCIPnlpiOracleChgExpr	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	considx,
		SCIP_EXPR *	expr
	)

replaces expression of one constraint or objective

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
considx	index of constraint where expression should be changed, or -1 for objective
expr	new expression, or NULL

Definition at line 1967 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::exprinterpreter, invalidateHessianLagSparsity(), invalidateJacobiSparsity(), NULL, SCIP_NlpiOracle::objective, SCIP_CALL, SCIP_OKAY, SCIPcaptureExpr(), SCIPdebugMessage, SCIPexprintCompile(), SCIPexprintFreeData(), SCIPreleaseExpr(), and updateVariableCounts().

Referenced by SCIP_DECL_NLPICHGEXPR().

◆ SCIPnlpiOracleChgObjConstant()

SCIP_RETCODE SCIPnlpiOracleChgObjConstant	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		SCIP_Real	objconstant
	)

changes the constant value in the objective function

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
objconstant	new value for objective constant

Definition at line 2013 of file nlpioracle.c.

References SCIP_NlpiOracleCons::lhs, NULL, SCIP_NlpiOracle::objective, SCIP_NlpiOracleCons::rhs, SCIP_OKAY, and SCIPdebugMessage.

Referenced by SCIP_DECL_NLPICHGOBJCONSTANT().

◆ SCIPnlpiOracleGetNVars()

int SCIPnlpiOracleGetNVars ( SCIP_NLPIORACLE * oracle )

gives the current number of variables

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2030 of file nlpioracle.c.

References NULL, and SCIP_NlpiOracle::nvars.

Referenced by computeInteriorPoint(), ensureStartingPoint(), evalFunctionInterval(), handleNlpParam(), initConopt(), initWorhp(), processSolveOutcome(), ReadMatrix(), SCIP_DECL_NLPIADDCONSTRAINTS(), SCIP_DECL_NLPIADDVARS(), SCIP_DECL_NLPICHGCONSSIDES(), SCIP_DECL_NLPIDELVARSET(), SCIP_DECL_NLPIFREEPROBLEM(), SCIP_DECL_NLPISETINITIALGUESS(), SCIP_DECL_NLPISOLVE(), setupGradients(), setupHessian(), setupStart(), Solution(), updateWorhp(), userDF(), userDG(), userF(), userG(), and userHM().

◆ SCIPnlpiOracleGetNConstraints()

int SCIPnlpiOracleGetNConstraints ( SCIP_NLPIORACLE * oracle )

gives the current number of constraints

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2040 of file nlpioracle.c.

References SCIP_NlpiOracle::nconss, and NULL.

Referenced by computeInteriorPoint(), FDEval(), FDInterval(), handleNlpParam(), initConopt(), initWorhp(), processSolveOutcome(), SCIP_DECL_NLPIADDCONSTRAINTS(), SCIP_DECL_NLPIADDVARS(), SCIP_DECL_NLPICHGCONSSIDES(), SCIP_DECL_NLPIDELCONSSET(), SCIP_DECL_NLPIFREEPROBLEM(), SCIP_DECL_NLPISETINITIALGUESS(), SCIP_DECL_NLPISOLVE(), setupGradients(), setupStart(), Solution(), updateWorhp(), userDF(), userDG(), userF(), userG(), and userHM().

◆ SCIPnlpiOracleGetVarLbs()

const SCIP_Real * SCIPnlpiOracleGetVarLbs ( SCIP_NLPIORACLE * oracle )

gives the variables lower bounds

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2050 of file nlpioracle.c.

References NULL, and SCIP_NlpiOracle::varlbs.

Referenced by ensureStartingPoint(), handleNlpParam(), initWorhp(), ReadMatrix(), SCIP_DECL_NLPICHGVARBOUNDS(), SCIP_DECL_NLPISOLVE(), setupStart(), and updateWorhp().

◆ SCIPnlpiOracleGetVarUbs()

const SCIP_Real * SCIPnlpiOracleGetVarUbs ( SCIP_NLPIORACLE * oracle )

gives the variables upper bounds

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2060 of file nlpioracle.c.

References NULL, and SCIP_NlpiOracle::varubs.

Referenced by ensureStartingPoint(), handleNlpParam(), initWorhp(), ReadMatrix(), SCIP_DECL_NLPICHGVARBOUNDS(), SCIP_DECL_NLPISOLVE(), setupStart(), and updateWorhp().

◆ SCIPnlpiOracleGetVarNames()

char ** SCIPnlpiOracleGetVarNames ( SCIP_NLPIORACLE * oracle )

gives the variables names, or NULL if not set

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2070 of file nlpioracle.c.

References NULL, and SCIP_NlpiOracle::varnames.

◆ SCIPnlpiOracleIsVarNonlinear()

SCIP_Bool SCIPnlpiOracleIsVarNonlinear	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	varidx
	)

indicates whether variable appears nonlinear in any objective or constraint

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
varidx	the variable to check

Definition at line 2080 of file nlpioracle.c.

References NULL, and SCIP_NlpiOracle::varnlcount.

Referenced by handleNlpParam().

◆ SCIPnlpiOracleGetVarCounts()

void SCIPnlpiOracleGetVarCounts	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int **	lincounts,
		const int **	nlcounts
	)

returns number of linear and nonlinear appearances of variables in objective and constraints

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
lincounts	buffer to return pointer to array of counts of linear appearances
nlcounts	buffer to return pointer to array of counts of nonlinear appearances

Definition at line 2095 of file nlpioracle.c.

References NULL, SCIP_NlpiOracle::varlincount, and SCIP_NlpiOracle::varnlcount.

◆ SCIPnlpiOracleGetObjectiveConstant()

SCIP_Real SCIPnlpiOracleGetObjectiveConstant ( SCIP_NLPIORACLE * oracle )

gives constant term of objective

Parameters

oracle pointer to NLPIORACLE data structure

Definition at line 2111 of file nlpioracle.c.

References SCIP_NlpiOracleCons::lhs, NULL, SCIP_NlpiOracle::objective, and SCIP_NlpiOracleCons::rhs.

Referenced by SCIP_DECL_NLPICHGOBJCONSTANT().

◆ SCIPnlpiOracleGetConstraintLhs()

SCIP_Real SCIPnlpiOracleGetConstraintLhs	(	SCIP_NLPIORACLE *	oracle,
		int	considx
	)

gives left-hand side of a constraint

Parameters

oracle	pointer to NLPIORACLE data structure
considx	constraint index

Definition at line 2122 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::lhs, and NULL.

Referenced by handleNlpParam(), initConopt(), initWorhp(), ReadMatrix(), SCIP_DECL_NLPICHGCONSSIDES(), SCIP_DECL_NLPISOLVE(), and updateWorhp().

◆ SCIPnlpiOracleGetConstraintRhs()

SCIP_Real SCIPnlpiOracleGetConstraintRhs	(	SCIP_NLPIORACLE *	oracle,
		int	considx
	)

gives right-hand side of a constraint

Parameters

oracle	pointer to NLPIORACLE data structure
considx	constraint index

Definition at line 2135 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, NULL, and SCIP_NlpiOracleCons::rhs.

Referenced by handleNlpParam(), initConopt(), initWorhp(), ReadMatrix(), SCIP_DECL_NLPICHGCONSSIDES(), SCIP_DECL_NLPISOLVE(), and updateWorhp().

◆ SCIPnlpiOracleGetConstraintName()

char * SCIPnlpiOracleGetConstraintName	(	SCIP_NLPIORACLE *	oracle,
		int	considx
	)

gives name of a constraint, may be NULL

Parameters

oracle	pointer to NLPIORACLE data structure
considx	constraint index

Definition at line 2148 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::name, and NULL.

◆ SCIPnlpiOracleGetConstraintLinearCoef()

SCIP_Real SCIPnlpiOracleGetConstraintLinearCoef	(	SCIP_NLPIORACLE *	oracle,
		int	considx,
		int	varpos
	)

gives linear coefficient of a given variable in a constraint

Parameters

oracle	pointer to NLPIORACLE data structure
considx	constraint index, or -1 for objective
varpos	position in the constraint's linear coefficient array

Definition at line 2161 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::lincoefs, NULL, and SCIP_NlpiOracle::objective.

Referenced by ReadMatrix().

◆ SCIPnlpiOracleIsConstraintNonlinear()

SCIP_Bool SCIPnlpiOracleIsConstraintNonlinear	(	SCIP_NLPIORACLE *	oracle,
		int	considx
	)

indicates whether constraint is nonlinear

Parameters

oracle	pointer to NLPIORACLE data structure
considx	index of constraint for which nonlinearity status is returned, or -1 for objective

Definition at line 2181 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, NULL, and SCIP_NlpiOracle::objective.

Referenced by computeInteriorPoint(), handleNlpParam(), SCIP_DECL_NLPIADDCONSTRAINTS(), SCIP_DECL_NLPISETOBJECTIVE(), and SCIP_DECL_NLPISOLVE().

◆ SCIPnlpiOracleGetEvalCapability()

SCIP_EXPRINTCAPABILITY SCIPnlpiOracleGetEvalCapability	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle
	)

gives the evaluation capabilities that are shared among all expressions in the problem

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure

Definition at line 2198 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::exprinterpreter, SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::objective, SCIP_EXPRINTCAPABILITY_ALL, and SCIPexprintGetExprCapability().

Referenced by SCIP_DECL_NLPISOLVE().

◆ SCIPnlpiOracleEvalObjectiveValue()

SCIP_RETCODE SCIPnlpiOracleEvalObjectiveValue	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real *	x,
		SCIP_Real *	objval
	)

evaluates the objective function in a given point

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
x	point where to evaluate
objval	pointer to store objective value

Definition at line 2221 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, evalFunctionValue(), SCIP_NlpiOracleCons::lhs, NULL, SCIP_NlpiOracle::objective, SCIP_NlpiOracleCons::rhs, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by F77_FUNC(), FDEval(), SCIP_DECL_NLPIGETSOLUTION(), setupStart(), and userF().

◆ SCIPnlpiOracleEvalConstraintValue()

SCIP_RETCODE SCIPnlpiOracleEvalConstraintValue	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		int	considx,
		const SCIP_Real *	x,
		SCIP_Real *	conval
	)

evaluates one constraint function in a given point

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
considx	index of constraint to evaluate
x	point where to evaluate
conval	pointer to store constraint value

Definition at line 2246 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, evalFunctionValue(), NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by F77_FUNC(), FDEval(), and setupStart().

◆ SCIPnlpiOracleEvalConstraintValues()

SCIP_RETCODE SCIPnlpiOracleEvalConstraintValues	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real *	x,
		SCIP_Real *	convals
	)

evaluates all constraint functions in a given point

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
x	point where to evaluate
convals	buffer to store constraint values

Definition at line 2270 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, evalFunctionValue(), SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by userG().

◆ SCIPnlpiOracleEvalObjectiveInterval()

SCIP_RETCODE SCIPnlpiOracleEvalObjectiveInterval	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		SCIP_Real	infinity,
		const SCIP_Real *	xmin,
		const SCIP_Real *	xmax,
		SCIP_Real *	objmin,
		SCIP_Real *	objmax
	)

interval evaluate objective function for given variable bounds

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
infinity	value for infinity
xmin	lower bound on variable interval
xmax	upper bound on variable interval
objmin	buffer to store lower bound of objective
objmax	buffer to store upper bound of objective

Definition at line 2299 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, evalFunctionInterval(), infinity, SCIP_NlpiOracleCons::lhs, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_NlpiOracleCons::rhs, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), and SCIPstopClock().

Referenced by FDInterval().

◆ SCIPnlpiOracleEvalConstraintInterval()

SCIP_RETCODE SCIPnlpiOracleEvalConstraintInterval	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		SCIP_Real	infinity,
		int	considx,
		const SCIP_Real *	xmin,
		const SCIP_Real *	xmax,
		SCIP_Real *	conmin,
		SCIP_Real *	conmax
	)

interval evaluate one constraint function for given variable bounds

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
infinity	value for infinity
considx	index of constraint to evaluate
xmin	lower bound on variable interval
xmax	upper bound on variable interval
conmin	buffer to store lower bound of constraint
conmax	buffer to store upper bound of constraint

Definition at line 2336 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, evalFunctionInterval(), infinity, NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIPdebugMessage, SCIPstartClock(), and SCIPstopClock().

Referenced by FDInterval().

◆ SCIPnlpiOracleEvalObjectiveGradient()

SCIP_RETCODE SCIPnlpiOracleEvalObjectiveGradient	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real *	x,
		SCIP_Bool	isnewx,
		SCIP_Real *	objval,
		SCIP_Real *	objgrad
	)

computes the objective gradient in a given point

Returns: SCIP_INVALIDDATA, if the function or its gradient could not be evaluated (domain error, etc.)

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
x	point where to evaluate
isnewx	has the point x changed since the last call to some evaluation function?
objval	pointer to store objective value
objgrad	pointer to store (dense) objective gradient

Definition at line 2368 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, evalFunctionGradient(), SCIP_NlpiOracleCons::lhs, NULL, SCIP_NlpiOracle::objective, SCIP_NlpiOracleCons::rhs, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by F77_FUNC(), FDEval(), setupStart(), and userDF().

◆ SCIPnlpiOracleEvalConstraintGradient()

SCIP_RETCODE SCIPnlpiOracleEvalConstraintGradient	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int	considx,
		const SCIP_Real *	x,
		SCIP_Bool	isnewx,
		SCIP_Real *	conval,
		SCIP_Real *	congrad
	)

computes a constraints gradient in a given point

Returns: SCIP_INVALIDDATA, if the function or its gradient could not be evaluated (domain error, etc.)

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
considx	index of constraint to compute gradient for
x	point where to evaluate
isnewx	has the point x changed since the last call to some evaluation function?
conval	pointer to store constraint value
congrad	pointer to store (dense) constraint gradient

Definition at line 2397 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, evalFunctionGradient(), NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by FDEval().

◆ SCIPnlpiOracleGetJacobianRowSparsity()

SCIP_RETCODE SCIPnlpiOracleGetJacobianRowSparsity	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int **	rowoffsets,
		const int **	cols,
		const SCIP_Bool **	colnlflags,
		int *	nnlnz
	)

gets sparsity pattern (rowwise) of Jacobian matrix

Note that internal data is returned in *rowoffsets and *cols, thus the user does not need to allocate memory there. Adding or deleting constraints destroys the sparsity structure and make another call to this function necessary.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
rowoffsets	pointer to store pointer that stores the offsets to each rows sparsity pattern in col, can be NULL
cols	pointer to store pointer that stores the indices of variables that appear in each row, rowoffsets[nconss] gives length of col, can be NULL
colnlflags	flags indicating whether an entry in nonlinear (sorted row-wise), can be NULL
nnlnz	number of nonlinear nonzeroes

Definition at line 2427 of file nlpioracle.c.

References computeRowJacobianSparsity(), SCIP_NlpiOracle::evalclock, SCIP_NlpiOracle::jaccolnlflags, SCIP_NlpiOracle::jaccols, SCIP_NlpiOracle::jacrowoffsets, SCIP_NlpiOracle::nconss, SCIP_NlpiOracle::njacnlnz, NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), and SCIPstopClock().

Referenced by handleNlpParam(), initWorhp(), and setupGradients().

◆ SCIPnlpiOracleGetJacobianColSparsity()

SCIP_RETCODE SCIPnlpiOracleGetJacobianColSparsity	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int **	coloffsets,
		const int **	rows,
		const SCIP_Bool **	rownlflags,
		int *	nnlnz
	)

gets sparsity pattern (columnwise) of Jacobian matrix

Note that internal data is returned in *coloffsets and *rows, thus the user does not need to allocate memory there. Adding or deleting constraints destroys the sparsity structure and make another call to this function necessary.

gets sparsity pattern (columnwise) of Jacobian matrix

Note that internal data is returned in *coloffsets, *rows, and *rownlflags, thus the user does not need to allocate memory there. Adding or deleting constraints destroys the sparsity structure and make another call to this function necessary.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
coloffsets	pointer to store pointer that stores the offsets to each column's sparsity pattern in row, can be NULL
rows	pointer to store pointer that stores the indices of rows that each variable participates in, coloffset[nvars] gives length of row, can be NULL
rownlflags	flags indicating whether an entry in nonlinear (sorted column-wise), can be NULL
nnlnz	number of nonlinear nonzeroes

Definition at line 2481 of file nlpioracle.c.

References computeRowJacobianSparsity(), SCIP_NlpiOracle::evalclock, SCIP_NlpiOracle::jaccolnlflags, SCIP_NlpiOracle::jaccoloffsets, SCIP_NlpiOracle::jaccols, SCIP_NlpiOracle::jacrownlflags, SCIP_NlpiOracle::jacrowoffsets, SCIP_NlpiOracle::jacrows, SCIP_NlpiOracle::nconss, SCIP_NlpiOracle::njacnlnz, NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemoryArray, SCIPallocClearBlockMemoryArray, SCIPdebugMessage, SCIPfreeBlockMemoryArray, SCIPstartClock(), and SCIPstopClock().

Referenced by initConopt(), and ReadMatrix().

◆ SCIPnlpiOracleGetObjGradientNnz()

SCIP_RETCODE SCIPnlpiOracleGetObjGradientNnz	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int **	nz,
		const SCIP_Bool **	nlnz,
		int *	nnz,
		int *	nnlnz
	)

gets nonzero indices in the objective gradient

Note that internal data is returned in *nz and *nlnz, thus the user does not need to allocate memory there.

gets nonzero indices in the objective gradient

Note that internal data is returned in *nz, thus the user does not need to allocate memory there.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
nz	pointer to store pointer that stores the nonzeroes of the objective gradient
nlnz	flags marking nonlinear nonzeroes
nnz	number of nonzeroes
nnlnz	number of nonlinear nonzeroes

Definition at line 2573 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, SCIP_NlpiOracleCons::expr, FALSE, SCIP_NlpiOracleCons::linidxs, SCIP_NlpiOracleCons::nlinidxs, SCIP_NlpiOracle::nobjgradnlnz, SCIP_NlpiOracle::nobjgradnz, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_NlpiOracle::objgradnz, SCIP_NlpiOracle::objnlflags, SCIP_Bool, SCIP_CALL, SCIP_EXPRITER_DFS, SCIP_OKAY, SCIPallocCleanBufferArray, SCIPallocClearBlockMemoryArray, SCIPcreateExpriter(), SCIPdebugMessage, SCIPduplicateBlockMemoryArray, SCIPexpriterGetNext(), SCIPexpriterInit(), SCIPexpriterIsEnd(), SCIPexpriterRestartDFS(), SCIPfreeCleanBufferArray, SCIPfreeExpriter(), SCIPgetIndexExprVaridx(), SCIPisExprVaridx(), SCIPstartClock(), SCIPstopClock(), and TRUE.

Referenced by initConopt(), and ReadMatrix().

◆ SCIPnlpiOracleEvalJacobian()

SCIP_RETCODE SCIPnlpiOracleEvalJacobian	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real *	x,
		SCIP_Bool	isnewx,
		SCIP_Real *	convals,
		SCIP_Real *	jacobi
	)

evaluates the Jacobian matrix in a given point

The values in the Jacobian matrix are returned in the same order as specified by the offset and col arrays obtained by SCIPnlpiOracleGetJacobianRowSparsity(). The user need to call SCIPnlpiOracleGetJacobianRowSparsity() at least ones before using this function.

Returns: SCIP_INVALIDDATA, if the Jacobian could not be evaluated (domain error, etc.)

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
x	point where to evaluate
isnewx	has the point x changed since the last call to some evaluation function?
convals	pointer to store constraint values, can be NULL
jacobi	pointer to store sparse jacobian values

Definition at line 2706 of file nlpioracle.c.

References ABS, BMSclearMemoryArray, BMScopyMemoryArray, SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::exprinterpreter, SCIP_NlpiOracle::jaccols, SCIP_NlpiOracle::jacrowoffsets, SCIP_NlpiOracleCons::lincoefs, SCIP_NlpiOracleCons::linidxs, SCIP_NlpiOracle::nconss, SCIP_NlpiOracleCons::nlinidxs, NULL, SCIP_NlpiOracle::nvars, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPallocCleanBufferArray, SCIPdebug, SCIPdebugMessage, SCIPdebugMsg, SCIPexprintGrad(), SCIPfreeCleanBufferArray, SCIPisFinite, SCIPisInfinity(), SCIPstartClock(), SCIPstopClock(), and x.

Referenced by F77_FUNC(), setupStart(), and userDG().

◆ SCIPnlpiOracleGetHessianLagSparsity()

SCIP_RETCODE SCIPnlpiOracleGetHessianLagSparsity	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const int **	offset,
		const int **	allnz,
		SCIP_Bool	colwise
	)

gets sparsity pattern of the Hessian matrix of the Lagrangian

Note that internal data is returned in *offset and *col, thus the user must not to allocate memory there. Adding or deleting variables, objective, or constraints may destroy the sparsity structure and make another call to this function necessary. Only elements of the lower left triangle and the diagonal are counted.

gets sparsity pattern of the Hessian matrix of the Lagrangian

Note that internal data is returned in *offset and *nzs, thus the user must not to allocate memory there. Adding or deleting variables, objective, or constraints may destroy the sparsity structure and make another call to this function necessary. Only elements of the lower left triangle and the diagonal are counted.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
offset	pointer to store pointer that stores the offsets to each row's (or col's if colwise == TRUE) sparsity pattern in nzs, can be NULL
allnz	pointer to store pointer that stores the indices of variables that appear in each row (or col if colwise = TRUE), offset[nvars] gives length of nzs, can be NULL
colwise	tells whether a columnwise (TRUE) or rowwise representation is needed

Definition at line 2833 of file nlpioracle.c.

References BMSclearMemoryArray, SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::hescolwise, SCIP_NlpiOracle::heslagnzs, SCIP_NlpiOracle::heslagoffsets, hessLagSparsitySetNzFlagForExpr(), SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemoryArray, SCIPdebugMessage, SCIPfreeBlockMemoryArray, SCIPfreeBlockMemoryArrayNull, SCIPstartClock(), and SCIPstopClock().

Referenced by initConopt(), initWorhp(), LagrStr(), setupHessian(), and userHM().

◆ SCIPnlpiOracleEvalHessianLag()

SCIP_RETCODE SCIPnlpiOracleEvalHessianLag	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		const SCIP_Real *	x,
		SCIP_Bool	isnewx_obj,
		SCIP_Bool	isnewx_cons,
		SCIP_Real	objfactor,
		const SCIP_Real *	lambda,
		SCIP_Real *	hessian,
		SCIP_Bool	colwise
	)

evaluates the Hessian matrix of the Lagrangian in a given point

The values in the Hessian matrix are returned in the same order as specified by the offset and col arrays obtained by SCIPnlpiOracleGetHessianLagSparsity(). The user must call SCIPnlpiOracleGetHessianLagSparsity() at least ones before using this function. Only elements of the lower left triangle and the diagonal are computed.

Returns: SCIP_INVALIDDATA, if the Hessian could not be evaluated (domain error, etc.)

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
x	point where to evaluate
isnewx_obj	has the point x changed since the last call to an objective evaluation function?
isnewx_cons	has the point x changed since the last call to the constraint evaluation function?
objfactor	weight for objective function
lambda	weights (Lagrangian multipliers) for the constraints
hessian	pointer to store sparse hessian values
colwise	whether the entries should be first sorted column-wise (TRUE) or row-wise

Definition at line 2933 of file nlpioracle.c.

References BMSclearMemoryArray, SCIP_NlpiOracle::conss, SCIP_NlpiOracle::evalclock, SCIP_NlpiOracleCons::expr, SCIP_NlpiOracleCons::exprintdata, SCIP_NlpiOracle::hescolwise, SCIP_NlpiOracle::heslagnzs, SCIP_NlpiOracle::heslagoffsets, hessLagAddExpr(), SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, SCIP_CALL, SCIP_OKAY, SCIPdebugMessage, SCIPstartClock(), SCIPstopClock(), and x.

Referenced by F77_FUNC(), LagrVal(), and userHM().

◆ SCIPnlpiOracleResetEvalTime()

SCIP_RETCODE SCIPnlpiOracleResetEvalTime	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle
	)

resets clock that measures evaluation time

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure

Definition at line 2984 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, NULL, SCIP_CALL, SCIP_OKAY, and SCIPresetClock().

Referenced by SCIP_DECL_NLPISOLVE().

◆ SCIPnlpiOracleGetEvalTime()

SCIP_Real SCIPnlpiOracleGetEvalTime	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle
	)

gives time spend in evaluation since last reset of clock

Gives 0 if the eval clock is disabled.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure

Definition at line 3000 of file nlpioracle.c.

References SCIP_NlpiOracle::evalclock, NULL, and SCIPgetClockTime().

Referenced by SCIP_DECL_NLPIGETSTATISTICS().

◆ SCIPnlpiOraclePrintProblem()

SCIP_RETCODE SCIPnlpiOraclePrintProblem	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		FILE *	file
	)

prints the problem to a file.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
file	file to print to, or NULL for standard output

Definition at line 3011 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, FALSE, SCIP_NlpiOracleCons::lhs, SCIP_NlpiOracleCons::name, SCIP_NlpiOracle::name, SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, printFunction(), SCIP_NlpiOracleCons::rhs, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPinfoMessage(), SCIPisInfinity(), SCIP_NlpiOracle::varlbs, SCIP_NlpiOracle::varlincount, SCIP_NlpiOracle::varnames, SCIP_NlpiOracle::varnlcount, and SCIP_NlpiOracle::varubs.

Referenced by computeInteriorPoint(), and SCIP_DECL_NLPISOLVE().

◆ SCIPnlpiOraclePrintProblemGams()

SCIP_RETCODE SCIPnlpiOraclePrintProblemGams	(	SCIP *	scip,
		SCIP_NLPIORACLE *	oracle,
		SCIP_Real *	initval,
		FILE *	file
	)

prints the problem to a file in GAMS format

If there are variable (equation, resp.) names with more than 9 characters, then variable (equation, resp.) names are prefixed with an unique identifier. This is to make it easier to identify variables solution output in the listing file. Names with more than 64 characters are shorten to 64 letters due to GAMS limits.

Parameters

scip	SCIP data structure
oracle	pointer to NLPIORACLE data structure
initval	starting point values for variables or NULL
file	file to print to, or NULL for standard output

Definition at line 3079 of file nlpioracle.c.

References SCIP_NlpiOracle::conss, SCIP_NlpiOracleCons::expr, exprIsNonSmooth(), FALSE, SCIP_NlpiOracleCons::lhs, SCIP_NlpiOracleCons::name, SCIP_NlpiOracle::name, SCIP_NlpiOracle::nconss, NULL, SCIP_NlpiOracle::nvars, SCIP_NlpiOracle::objective, printFunction(), printName(), SCIP_NlpiOracleCons::rhs, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPdebugMessage, SCIPinfoMessage(), SCIPisInfinity(), SCIPsnprintf(), TRUE, SCIP_NlpiOracle::varlbs, SCIP_NlpiOracle::varnames, and SCIP_NlpiOracle::varubs.

SCIP

Detailed Description

Typedefs

Functions

Typedef Documentation

◆ SCIP_NLPIORACLE

Function Documentation

◆ SCIPnlpiOracleCreate()

◆ SCIPnlpiOracleFree()

◆ SCIPnlpiOracleSetProblemName()

◆ SCIPnlpiOracleGetProblemName()

◆ SCIPnlpiOracleAddVars()

◆ SCIPnlpiOracleAddConstraints()

◆ SCIPnlpiOracleSetObjective()

◆ SCIPnlpiOracleChgVarBounds()

◆ SCIPnlpiOracleChgConsSides()

◆ SCIPnlpiOracleDelVarSet()

◆ SCIPnlpiOracleDelConsSet()

◆ SCIPnlpiOracleChgLinearCoefs()

◆ SCIPnlpiOracleChgExpr()

◆ SCIPnlpiOracleChgObjConstant()

◆ SCIPnlpiOracleGetNVars()

◆ SCIPnlpiOracleGetNConstraints()

◆ SCIPnlpiOracleGetVarLbs()

◆ SCIPnlpiOracleGetVarUbs()

◆ SCIPnlpiOracleGetVarNames()

◆ SCIPnlpiOracleIsVarNonlinear()

◆ SCIPnlpiOracleGetVarCounts()

◆ SCIPnlpiOracleGetObjectiveConstant()

◆ SCIPnlpiOracleGetConstraintLhs()

◆ SCIPnlpiOracleGetConstraintRhs()

◆ SCIPnlpiOracleGetConstraintName()

◆ SCIPnlpiOracleGetConstraintLinearCoef()

◆ SCIPnlpiOracleIsConstraintNonlinear()

◆ SCIPnlpiOracleGetEvalCapability()

◆ SCIPnlpiOracleEvalObjectiveValue()

◆ SCIPnlpiOracleEvalConstraintValue()

◆ SCIPnlpiOracleEvalConstraintValues()

◆ SCIPnlpiOracleEvalObjectiveInterval()

◆ SCIPnlpiOracleEvalConstraintInterval()

◆ SCIPnlpiOracleEvalObjectiveGradient()

◆ SCIPnlpiOracleEvalConstraintGradient()

◆ SCIPnlpiOracleGetJacobianRowSparsity()

◆ SCIPnlpiOracleGetJacobianColSparsity()

◆ SCIPnlpiOracleGetObjGradientNnz()

◆ SCIPnlpiOracleEvalJacobian()

◆ SCIPnlpiOracleGetHessianLagSparsity()

◆ SCIPnlpiOracleEvalHessianLag()

◆ SCIPnlpiOracleResetEvalTime()

◆ SCIPnlpiOracleGetEvalTime()

◆ SCIPnlpiOraclePrintProblem()

◆ SCIPnlpiOraclePrintProblemGams()