Detailed Description

implementation of AMPL/MPs NLHandler that constructs a SCIP problem while a .nl file is read

Definition at line 102 of file reader_nl.cpp.

implementation of AMPL/MPs NLHandler that constructs a SCIP problem while a .nl file is read More...

Data Structures
class	LinearExprHandler

class	LinearPartHandler

class	NumericArgHandler

class	SuffixHandler

Public Types
typedef SuffixHandler< int >	IntSuffixHandler

typedef SuffixHandler< SCIP_Real >	DblSuffixHandler

typedef LinearPartHandler	LinearObjHandler

typedef LinearPartHandler	LinearConHandler

Public Member Functions
	AMPLProblemHandler (SCIP scip_, const char filename)

	~AMPLProblemHandler ()

void	OnHeader (const mp::NLHeader &h)

SCIP_EXPR *	OnNumber (double value)
	receive notification of a number in a nonlinear expression More...

SCIP_EXPR *	OnVariableRef (int variableIndex)
	receive notification of a variable reference in a nonlinear expression More...

SCIP_EXPR *	OnUnary (mp::expr::Kind kind, SCIP_EXPR *child)
	receive notification of a unary expression More...

SCIP_EXPR *	OnBinary (mp::expr::Kind kind, SCIP_EXPR firstChild, SCIP_EXPR secondChild)
	receive notification of a binary expression More...

NumericArgHandler	BeginSum (int num_args)
	receive notification of the beginning of a summation More...

SCIP_EXPR *	EndSum (NumericArgHandler handler)
	receive notification of the end of a summation More...

void	OnObj (int objectiveIndex, mp::obj::Type type, SCIP_EXPR *nonlinearExpression)
	receive notification of an objective type and the nonlinear part of an objective expression More...

void	OnAlgebraicCon (int constraintIndex, SCIP_EXPR *expr)
	receive notification of an algebraic constraint expression More...

LinearExprHandler	BeginCommonExpr (int index, int num_linear_terms)
	receive notification of the beginning of a common expression (defined variable) More...

void	EndCommonExpr (int index, SCIP_EXPR *expr, int)
	receive notification of the end of a common expression More...

SCIP_EXPR *	OnCommonExprRef (int expr_index)
	receive notification of a common expression (defined variable) reference More...

void	OnVarBounds (int variableIndex, double variableLB, double variableUB)
	receive notification of variable bounds More...

void	OnConBounds (int index, double lb, double ub)
	receive notification of constraint sides More...

void	OnInitialValue (int var_index, double value)
	receive notification of the initial value for a variable More...

void	OnInitialDualValue (int, double)
	receives notification of the initial value for a dual variable More...

ColumnSizeHandler	OnColumnSizes ()
	receives notification of Jacobian column sizes More...

IntSuffixHandler	OnIntSuffix (fmt::StringRef name, mp::suf::Kind kind, int)
	receive notification of an integer suffix More...

DblSuffixHandler	OnDblSuffix (fmt::StringRef name, mp::suf::Kind kind, int)
	receive notification of a double suffix More...

LinearPartHandler	OnLinearObjExpr (int objectiveIndex, int)
	receive notification of the linear part of an objective More...

LinearConHandler	OnLinearConExpr (int constraintIndex, int)
	receive notification of the linear part of a constraint More...

void	EndInput ()

SCIP_RETCODE	cleanup ()

Member Typedef Documentation

◆ IntSuffixHandler

typedef SuffixHandler<int> AMPLProblemHandler::IntSuffixHandler

Definition at line 1022 of file reader_nl.cpp.

◆ DblSuffixHandler

typedef SuffixHandler<SCIP_Real> AMPLProblemHandler::DblSuffixHandler

Definition at line 1033 of file reader_nl.cpp.

◆ LinearObjHandler

typedef LinearPartHandler AMPLProblemHandler::LinearObjHandler

Definition at line 1103 of file reader_nl.cpp.

◆ LinearConHandler

typedef LinearPartHandler AMPLProblemHandler::LinearConHandler

Definition at line 1117 of file reader_nl.cpp.

Constructor & Destructor Documentation

◆ AMPLProblemHandler()

AMPLProblemHandler::AMPLProblemHandler	(	SCIP *	scip_,
		const char *	filename
	)

inline

constructor

initializes SCIP problem and problem data

Parameters

scip_	SCIP data structure
filename	name of .nl file that is read

Definition at line 188 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, SCIPallocBlockMemoryArray, SCIPallocClearMemory, and SCIPcreateProb().

◆ ~AMPLProblemHandler()

AMPLProblemHandler::~AMPLProblemHandler ( )

inline

destructor

only asserts that cleanup() has been called, as we cannot throw an exception or return a SCIP_RETCODE here

Definition at line 251 of file reader_nl.cpp.

Member Function Documentation

◆ OnHeader()

void AMPLProblemHandler::OnHeader ( const mp::NLHeader & h )

inline

process header of .nl files

create and add variables, allocate constraints

Parameters

h	header data

Definition at line 264 of file reader_nl.cpp.

References BMScopyMemoryArray, MAX, NULL, SCIP_CALL_THROW, SCIP_MAXSTRLEN, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_INTEGER, SCIPABORT, SCIPaddVar(), SCIPallocBlockMemoryArray, SCIPcreateConsBasicLinear(), SCIPcreateConsBasicNonlinear(), SCIPcreateExprValue(), SCIPcreateExprVar(), SCIPcreateVarBasic(), SCIPinfinity(), SCIPreleaseExpr(), and SCIPsnprintf().

◆ OnNumber()

SCIP_EXPR* AMPLProblemHandler::OnNumber ( double value )

inline

receive notification of a number in a nonlinear expression

Parameters

value value

Definition at line 393 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, and SCIPcreateExprValue().

◆ OnVariableRef()

SCIP_EXPR* AMPLProblemHandler::OnVariableRef ( int variableIndex )

inline

receive notification of a variable reference in a nonlinear expression

Parameters

variableIndex AMPL index of variable

Definition at line 408 of file reader_nl.cpp.

References NULL.

◆ OnUnary()

SCIP_EXPR* AMPLProblemHandler::OnUnary	(	mp::expr::Kind	kind,
		SCIP_EXPR *	child
	)

inline

receive notification of a unary expression

Parameters

kind	expression operator
child	argument

Definition at line 420 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, SCIP_Real, SCIPcreateExprAbs(), SCIPcreateExprCos(), SCIPcreateExprExp(), SCIPcreateExprLog(), SCIPcreateExprPow(), SCIPcreateExprSin(), SCIPcreateExprSum(), and SCIPreleaseExpr().

◆ OnBinary()

SCIP_EXPR* AMPLProblemHandler::OnBinary	(	mp::expr::Kind	kind,
		SCIP_EXPR *	firstChild,
		SCIP_EXPR *	secondChild
	)

inline

receive notification of a binary expression

Parameters

kind	expression operand
firstChild	first argument
secondChild	second argument

Definition at line 488 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, SCIP_Real, SCIPcreateExprExp(), SCIPcreateExprLog(), SCIPcreateExprPow(), SCIPcreateExprProduct(), SCIPcreateExprSum(), SCIPgetValueExprValue(), SCIPisExprValue(), and SCIPreleaseExpr().

◆ BeginSum()

NumericArgHandler AMPLProblemHandler::BeginSum ( int num_args )

inline

receive notification of the beginning of a summation

Parameters

num_args number of terms to expect

Definition at line 601 of file reader_nl.cpp.

References h.

◆ EndSum()

SCIP_EXPR* AMPLProblemHandler::EndSum ( NumericArgHandler handler )

inline

receive notification of the end of a summation

Parameters

handler handler that handled the sum

Definition at line 610 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, SCIPcreateExprSum(), and AMPLProblemHandler::NumericArgHandler::v.

◆ OnObj()

void AMPLProblemHandler::OnObj	(	int	objectiveIndex,
		mp::obj::Type	type,
		SCIP_EXPR *	nonlinearExpression
	)

inline

receive notification of an objective type and the nonlinear part of an objective expression

Parameters

objectiveIndex	index of objective
type	objective sense
nonlinearExpression	nonlinear part of objective function

Definition at line 622 of file reader_nl.cpp.

References MAX, NULL, SCIP_CALL_THROW, SCIP_OBJSENSE_MAXIMIZE, SCIP_OBJSENSE_MINIMIZE, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPaddVar(), SCIPcreateVarBasic(), SCIPgetValueExprValue(), SCIPisExprValue(), SCIPreleaseVar(), and SCIPsetObjsense().

◆ OnAlgebraicCon()

void AMPLProblemHandler::OnAlgebraicCon	(	int	constraintIndex,
		SCIP_EXPR *	expr
	)

inline

receive notification of an algebraic constraint expression

Parameters

constraintIndex	index of constraint
expr	nonlinear part of constraint

Definition at line 652 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, and SCIPchgExprNonlinear().

◆ BeginCommonExpr()

LinearExprHandler AMPLProblemHandler::BeginCommonExpr	(	int	index,
		int	num_linear_terms
	)

inline

receive notification of the beginning of a common expression (defined variable)

Parameters

index	index of common expression
num_linear_terms	number of terms to expect

Definition at line 717 of file reader_nl.cpp.

◆ EndCommonExpr()

void AMPLProblemHandler::EndCommonExpr	(	int	index,
		SCIP_EXPR *	expr,
		int
	)

inline

receive notification of the end of a common expression

Parameters

index	index of common expression
expr	nonlinear part of common expression

Definition at line 729 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, and SCIPappendExprSumExpr().

◆ OnCommonExprRef()

SCIP_EXPR* AMPLProblemHandler::OnCommonExprRef ( int expr_index )

inline

receive notification of a common expression (defined variable) reference

Parameters

expr_index index of common expression

Definition at line 750 of file reader_nl.cpp.

References NULL.

◆ OnVarBounds()

void AMPLProblemHandler::OnVarBounds	(	int	variableIndex,
		double	variableLB,
		double	variableUB
	)

inline

receive notification of variable bounds

Parameters

variableIndex	AMPL index of variable
variableLB	variable lower bound
variableUB	variable upper bound

Definition at line 761 of file reader_nl.cpp.

References SCIP_CALL_THROW, SCIP_VARTYPE_BINARY, SCIPchgVarLbGlobal(), SCIPchgVarUbGlobal(), SCIPinfinity(), and SCIPvarGetType().

◆ OnConBounds()

void AMPLProblemHandler::OnConBounds	(	int	index,
		double	lb,
		double	ub
	)

inline

receive notification of constraint sides

Parameters

index	AMPL index of constraint
lb	constraint left-hand-side
ub	constraint right-hand-side

Definition at line 784 of file reader_nl.cpp.

References SCIP_CALL_THROW, SCIPchgLhsLinear(), SCIPchgLhsNonlinear(), SCIPchgRhsLinear(), SCIPchgRhsNonlinear(), and SCIPisInfinity().

◆ OnInitialValue()

void AMPLProblemHandler::OnInitialValue	(	int	var_index,
		double	value
	)

inline

receive notification of the initial value for a variable

Parameters

var_index	AMPL index of variable
value	initial primal value of variable

Definition at line 819 of file reader_nl.cpp.

References NULL, SCIP_CALL_THROW, SCIPcreateSol(), and SCIPsetSolVal().

◆ OnInitialDualValue()

void AMPLProblemHandler::OnInitialDualValue	(	int	,
		double
	)

inline

receives notification of the initial value for a dual variable

Definition at line 833 of file reader_nl.cpp.

◆ OnColumnSizes()

ColumnSizeHandler AMPLProblemHandler::OnColumnSizes ( )

inline

receives notification of Jacobian column sizes

use ColumnSizeHandler from upper class, which does nothing

Definition at line 842 of file reader_nl.cpp.

◆ OnIntSuffix()

IntSuffixHandler AMPLProblemHandler::OnIntSuffix	(	fmt::StringRef	name,
		mp::suf::Kind	kind,
		int
	)

inline

receive notification of an integer suffix

Parameters

name	suffix name, not null-terminated
kind	suffix kind

Definition at line 1024 of file reader_nl.cpp.

◆ OnDblSuffix()

DblSuffixHandler AMPLProblemHandler::OnDblSuffix	(	fmt::StringRef	name,
		mp::suf::Kind	kind,
		int
	)

inline

receive notification of a double suffix

Parameters

name	suffix name, not null-terminated
kind	suffix kind

Definition at line 1035 of file reader_nl.cpp.

◆ OnLinearObjExpr()

LinearPartHandler AMPLProblemHandler::OnLinearObjExpr	(	int	objectiveIndex,
		int
	)

inline

receive notification of the linear part of an objective

Parameters

objectiveIndex index of objective

Definition at line 1106 of file reader_nl.cpp.

◆ OnLinearConExpr()

LinearConHandler AMPLProblemHandler::OnLinearConExpr	(	int	constraintIndex,
		int
	)

inline

receive notification of the linear part of a constraint

Parameters

constraintIndex index of constraint

Definition at line 1120 of file reader_nl.cpp.

◆ EndInput()

void AMPLProblemHandler::EndInput ( )

inline

receive notification of the end of the input

setup all nonlinear constraints and add them to SCIP
add linear constraints to SCIP (should be after nonlinear ones to respect order in .nl file)
add initial solution, if initial values were given

Definition at line 1133 of file reader_nl.cpp.

References NULL, SCIP_Bool, SCIP_CALL_THROW, SCIP_OBJSENSE_MAXIMIZE, SCIP_OBJSENSE_MINIMIZE, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPaddCons(), SCIPaddLinearVarNonlinear(), SCIPaddSolFree(), SCIPaddVar(), SCIPcreateConsBasicNonlinear(), SCIPcreateConsBasicSOS1(), SCIPcreateConsBasicSOS2(), SCIPcreateVarBasic(), SCIPgetObjsense(), SCIPinfinity(), SCIPreleaseCons(), and SCIPreleaseVar().

◆ cleanup()

SCIP_RETCODE AMPLProblemHandler::cleanup ( )

inline

releases expressions and linear constraints from data

should be called if there was an error while reading the .nl file this is not in the destructor, because we want to return SCIP_RETCODE

Definition at line 1240 of file reader_nl.cpp.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeSol(), and SCIPreleaseExpr().

Referenced by SCIP_DECL_READERREAD().

SCIP

Detailed Description

Data Structures

Public Types

Public Member Functions

Member Typedef Documentation

◆ IntSuffixHandler

◆ DblSuffixHandler

◆ LinearObjHandler

◆ LinearConHandler

Constructor & Destructor Documentation

◆ AMPLProblemHandler()

◆ ~AMPLProblemHandler()

Member Function Documentation

◆ OnHeader()

◆ OnNumber()

◆ OnVariableRef()

◆ OnUnary()

◆ OnBinary()

◆ BeginSum()

◆ EndSum()

◆ OnObj()

◆ OnAlgebraicCon()

◆ BeginCommonExpr()

◆ EndCommonExpr()

◆ OnCommonExprRef()

◆ OnVarBounds()

◆ OnConBounds()

◆ OnInitialValue()

◆ OnInitialDualValue()

◆ OnColumnSizes()

◆ OnIntSuffix()

◆ OnDblSuffix()

◆ OnLinearObjExpr()

◆ OnLinearConExpr()

◆ EndInput()

◆ cleanup()