Hash Set

Detailed Description

very lightweight hash set of pointers

Functions
SCIP_EXPORT SCIP_RETCODE	SCIPhashsetCreate (SCIP_HASHSET **hashset, BMS_BLKMEM *blkmem, int size)
SCIP_EXPORT void	SCIPhashsetFree (SCIP_HASHSET **hashset, BMS_BLKMEM *blkmem)
SCIP_EXPORT SCIP_RETCODE	SCIPhashsetInsert (SCIP_HASHSET *hashset, BMS_BLKMEM *blkmem, void *element)
SCIP_EXPORT SCIP_Bool	SCIPhashsetExists (SCIP_HASHSET *hashset, void *element)
SCIP_EXPORT SCIP_RETCODE	SCIPhashsetRemove (SCIP_HASHSET *hashset, void *element)
SCIP_EXPORT void	SCIPhashsetPrintStatistics (SCIP_HASHSET *hashset, SCIP_MESSAGEHDLR *messagehdlr)
SCIP_EXPORT SCIP_Bool	SCIPhashsetIsEmpty (SCIP_HASHSET *hashset)
SCIP_EXPORT int	SCIPhashsetGetNElements (SCIP_HASHSET *hashset)
SCIP_EXPORT int	SCIPhashsetGetNSlots (SCIP_HASHSET *hashset)
SCIP_EXPORT void **	SCIPhashsetGetSlots (SCIP_HASHSET *hashset)
SCIP_EXPORT void	SCIPhashsetRemoveAll (SCIP_HASHSET *hashset)

Function Documentation

SCIPhashsetCreate()

SCIP_EXPORT SCIP_RETCODE SCIPhashsetCreate	(	SCIP_HASHSET **	hashset,
		BMS_BLKMEM *	blkmem,
		int	size
	)

creates a hash set of pointers

Parameters

hashset	pointer to store the created hash set
blkmem	block memory used to store hash set entries
size	initial size of the hash set; it is guaranteed that the set is not resized if at most that many elements are inserted

Definition at line 3698 of file misc.c.

References BMSallocBlockMemory, BMSallocClearBlockMemoryArray, log(), MAX, NULL, SCIP_ALLOC, SCIP_OKAY, and SCIPhashsetGetNSlots().

Referenced by dualBoundStrengthening(), mod2MatrixAddCol(), processHashlists(), and SCIPrealHashCode().

SCIPhashsetFree()

SCIP_EXPORT void SCIPhashsetFree	(	SCIP_HASHSET **	hashset,
		BMS_BLKMEM *	blkmem
	)

frees the hash set

Parameters

hashset	pointer to the hash set
blkmem	block memory used to store hash set entries

Definition at line 3729 of file misc.c.

References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, and SCIPhashsetGetNSlots().

Referenced by destroyMod2Matrix(), dualBoundStrengthening(), mod2matrixRemoveCol(), processHashlists(), and SCIPrealHashCode().

SCIPhashsetInsert()

SCIP_EXPORT SCIP_RETCODE SCIPhashsetInsert	(	SCIP_HASHSET *	hashset,
		BMS_BLKMEM *	blkmem,
		void *	element
	)

inserts new element into the hash set

Parameters

hashset	hash set
blkmem	block memory used to store hash set entries
element	element to insert

Definition at line 3739 of file misc.c.

References hashsetCheckLoad(), hashsetInsert(), NULL, SCIP_CALL, SCIP_OKAY, and SCIP_HashSet::slots.

Referenced by dualBoundStrengthening(), mod2colLinkRow(), processHashlists(), and SCIPrealHashCode().

SCIPhashsetExists()

SCIP_EXPORT SCIP_Bool SCIPhashsetExists	(	SCIP_HASHSET *	hashset,
		void *	element
	)

checks whether an element exists in the hash set

Parameters

hashset	hash set
element	element to search for

Definition at line 3756 of file misc.c.

References ELEM_DISTANCE, FALSE, hashSetDesiredPos(), NULL, SCIPhashsetGetNSlots(), SCIP_HashSet::slots, and TRUE.

Referenced by dualBoundStrengthening(), mod2colLinkRow(), mod2colUnlinkRow(), processHashlists(), SCIP_DECL_HASHKEYEQ(), SCIPhashsetRemove(), and SCIPrealHashCode().

SCIPhashsetRemove()

SCIP_EXPORT SCIP_RETCODE SCIPhashsetRemove	(	SCIP_HASHSET *	hashset,
		void *	element
	)

removes an element from the hash set, if it exists

Parameters

hashset	hash set
element	origin to remove from the list

Definition at line 3797 of file misc.c.

References ELEM_DISTANCE, hashSetDesiredPos(), SCIP_HashSet::nelements, NULL, SCIP_OKAY, SCIPhashsetExists(), SCIPhashsetGetNSlots(), SCIP_HashSet::slots, and TRUE.

Referenced by mod2colUnlinkRow(), and SCIPrealHashCode().

SCIPhashsetPrintStatistics()

SCIP_EXPORT void SCIPhashsetPrintStatistics	(	SCIP_HASHSET *	hashset,
		SCIP_MESSAGEHDLR *	messagehdlr
	)

prints statistics about hash set usage

Parameters

hashset	hash set
messagehdlr	message handler

Definition at line 3872 of file misc.c.

References hashSetDesiredPos(), MAX, SCIP_HashSet::nelements, NULL, SCIP_Real, SCIPhashsetGetNSlots(), SCIPmessagePrintInfo(), and SCIP_HashSet::slots.

Referenced by SCIPrealHashCode().

SCIPhashsetIsEmpty()

SCIP_EXPORT SCIP_Bool SCIPhashsetIsEmpty

(

SCIP_HASHSET *

hashset

)

indicates whether a hash set has no entries

Parameters

hashset

hash set

Definition at line 3923 of file misc.c.

References SCIP_HashSet::nelements.

Referenced by SCIPrealHashCode().

SCIPhashsetGetNElements()

SCIP_EXPORT int SCIPhashsetGetNElements

(

SCIP_HASHSET *

hashset

)

gives the number of elements in a hash set

Parameters

hashset

hash set

Definition at line 3931 of file misc.c.

References SCIP_HashSet::nelements.

Referenced by mod2matrixPreprocessColumns(), SCIP_DECL_HASHKEYEQ(), and SCIPrealHashCode().

SCIPhashsetGetNSlots()

SCIP_EXPORT int SCIPhashsetGetNSlots

(

SCIP_HASHSET *

hashset

)

gives the number of slots of a hash set

Parameters

hashset

hash set

Definition at line 3939 of file misc.c.

References SCIP_HashSet::shift.

Referenced by doSeparation(), hashsetCheckLoad(), hashsetInsert(), mod2colUnlinkRow(), mod2matrixRemoveCol(), SCIP_DECL_HASHKEYEQ(), SCIP_DECL_HASHKEYVAL(), SCIPhashsetCreate(), SCIPhashsetExists(), SCIPhashsetFree(), SCIPhashsetPrintStatistics(), SCIPhashsetRemove(), SCIPhashsetRemoveAll(), and SCIPrealHashCode().

SCIPhashsetGetSlots()

SCIP_EXPORT void** SCIPhashsetGetSlots

(

SCIP_HASHSET *

hashset

)

gives the array of hash set slots; contains all elements in indetermined order and may contain NULL values

Parameters

hashset

hash set

Definition at line 3947 of file misc.c.

References SCIP_HashSet::slots.

Referenced by doSeparation(), mod2colUnlinkRow(), mod2matrixPreprocessColumns(), mod2matrixRemoveCol(), SCIP_DECL_HASHKEYEQ(), SCIP_DECL_HASHKEYVAL(), and SCIPrealHashCode().

SCIPhashsetRemoveAll()

SCIP_EXPORT void SCIPhashsetRemoveAll

(

SCIP_HASHSET *

hashset

)

removes all entries in a hash set.

Parameters

hashset

hash set

Definition at line 3955 of file misc.c.

References BMSclearMemoryArray, SCIP_HashSet::nelements, SCIPhashsetGetNSlots(), and SCIP_HashSet::slots.

Referenced by SCIPrealHashCode().