Permutations Shuffling

Detailed Description

methods for shuffling arrays

Functions
void	SCIPswapInts (int *value1, int *value2)
void	SCIPswapReals (SCIP_Real *value1, SCIP_Real *value2)
void	SCIPswapPointers (void **pointer1, void **pointer2)
void	SCIPpermuteIntArray (int *array, int begin, int end, unsigned int *randseed)
void	SCIPrandomPermuteIntArray (SCIP_RANDNUMGEN *randgen, int *array, int begin, int end)
void	SCIPrandomPermuteArray (SCIP_RANDNUMGEN *randgen, void **array, int begin, int end)
void	SCIPpermuteArray (void **array, int begin, int end, unsigned int *randseed)

Function Documentation

SCIPswapInts()

void SCIPswapInts	(	int *	value1,
		int *	value2
	)

swaps two ints

Parameters

value1	pointer to first integer
value2	pointer to second integer

Definition at line 10370 of file misc.c.

Referenced by analyzeConflictOverload(), checkOverloadViaThetaTree(), isConnectedSOS1(), and mod2matrixPreprocessRows().

SCIPswapReals()

void SCIPswapReals	(	SCIP_Real *	value1,
		SCIP_Real *	value2
	)

swaps two real values

Parameters

value1	pointer to first real value
value2	pointer to second real value

Definition at line 10383 of file misc.c.

References SCIP_Real.

Referenced by extractProducts(), filterWithDynamicParallelism(), filterWithParallelism(), penaliseWithParallelism(), scaleConsSides(), SCIP_DECL_NLHDLRREVERSEPROP(), scoring(), selectBestCut(), setupAggregationData(), tightenVarsBoundsSOS1(), and tryFillNlhdlrExprDataQuad().

SCIPswapPointers()

void SCIPswapPointers	(	void **	pointer1,
		void **	pointer2
	)

swaps the addresses of two pointers

Parameters

pointer1	first pointer
pointer2	second pointer

Definition at line 10396 of file misc.c.

Referenced by applyProbing(), bilinearTermsInsertEntry(), cancelCol(), cancelRow(), CREATE_CONSTRAINT(), DECL_VARFIXINGS(), detectRedundantConstraints(), filterWithDensity(), filterWithDynamicParallelism(), filterWithParallelism(), getNextToken(), hashmapCheckLoad(), hashmapInsert(), hashsetCheckLoad(), hashsetInsert(), hashtableCheckLoad(), hashtableInsert(), mod2matrixPreprocessRows(), parseQuadratic(), penaliseWithParallelism(), presolveAddKKTQuadBilinearTerms(), pushToken(), removeRedundantConss(), SCIP_DECL_HEURINITSOL(), SCIPendProbing(), SCIPgetBilinTermIdxNonlinear(), SCIProwGetDiscreteScalarProduct(), SCIProwGetScalarProduct(), SCIPstartProbing(), SCIPsyncdataGetSolutionBuffer(), scoring(), selectBestCut(), and setupAggregationData().

SCIPpermuteIntArray()

void SCIPpermuteIntArray	(	int *	array,
		int	begin,
		int	end,
		unsigned int *	randseed
	)

randomly shuffles parts of an integer array using the Fisher-Yates algorithm

Deprecated:

Please use SCIPrandomPermuteIntArray()

randomly shuffles parts of an integer array using the Fisher-Yates algorithm

Deprecated:

Please use SCIPrandomPermuteIntArray()

Parameters

array	array to be shuffled
begin	first included index that should be subject to shuffling (0 for first array entry)
end	first excluded index that should not be subject to shuffling (array size for last array entry)
randseed	seed value for the random generator

Definition at line 10412 of file misc.c.

References getRandomInt().

SCIPrandomPermuteIntArray()

void SCIPrandomPermuteIntArray	(	SCIP_RANDNUMGEN *	randnumgen,
		int *	array,
		int	begin,
		int	end
	)

randomly shuffles parts of an integer array using the Fisher-Yates algorithm

Parameters

randnumgen	random number generator
array	array to be shuffled
begin	first included index that should be subject to shuffling (0 for first array entry)
end	first excluded index that should not be subject to shuffling (array size for last array entry)

Definition at line 10149 of file misc.c.

References SCIPrandomGetInt().

Referenced by dataReset(), detectMinors(), SCIP_DECL_HEUREXEC(), SCIPreoptApply(), and SCIPreoptSplitRoot().

SCIPrandomPermuteArray()

void SCIPrandomPermuteArray	(	SCIP_RANDNUMGEN *	randnumgen,
		void **	array,
		int	begin,
		int	end
	)

randomly shuffles parts of an array using the Fisher-Yates algorithm

Parameters

randnumgen	random number generator
array	array to be shuffled
begin	first included index that should be subject to shuffling (0 for first array entry)
end	first excluded index that should not be subject to shuffling (array size for last array entry)

Definition at line 10179 of file misc.c.

References SCIPrandomGetInt().

Referenced by determineVariableFixings(), performRandRounding(), preprocessCliques(), and SCIPpermuteProb().

SCIPpermuteArray()

void SCIPpermuteArray	(	void **	array,
		int	begin,
		int	end,
		unsigned int *	randseed
	)

randomly shuffles parts of an array using the Fisher-Yates algorithm

Deprecated:

Please use SCIPrandomPermuteArray()

randomly shuffles parts of an array using the Fisher-Yates algorithm

Deprecated:

Please use SCIPrandomPermuteArray()

Parameters

array	array to be shuffled
begin	first included index that should be subject to shuffling (0 for first array entry)
end	first excluded index that should not be subject to shuffling (array size for last array entry)
randseed	seed value for the random generator

Definition at line 10446 of file misc.c.

References getRandomInt().