Detailed Description
hash table that resolves conflicts by probing
Macros | |
#define | SCIPhashSignature64(a) (UINT64_C(0x8000000000000000)>>((UINT32_C(0x9e3779b9) * ((uint32_t)(a)))>>26)) |
#define | SCIPhashTwo(a, b) ((uint32_t)((((uint32_t)(a) + 0xd37e9a1ce2148403ULL) * ((uint32_t)(b) + 0xe5fcc163aef32782ULL) )>>32)) |
#define | SCIPhashThree(a, b, c) |
#define | SCIPhashFour(a, b, c, d) |
#define | SCIPhashFive(a, b, c, d, e) |
#define | SCIPhashSix(a, b, c, d, e, f) |
#define | SCIPhashSeven(a, b, c, d, e, f, g) |
Macro Definition Documentation
◆ SCIPhashSignature64
#define SCIPhashSignature64 | ( | a | ) | (UINT64_C(0x8000000000000000)>>((UINT32_C(0x9e3779b9) * ((uint32_t)(a)))>>26)) |
Definition at line 549 of file pub_misc.h.
◆ SCIPhashTwo
#define SCIPhashTwo | ( | a, | |
b | |||
) | ((uint32_t)((((uint32_t)(a) + 0xd37e9a1ce2148403ULL) * ((uint32_t)(b) + 0xe5fcc163aef32782ULL) )>>32)) |
Definition at line 551 of file pub_misc.h.
◆ SCIPhashThree
Definition at line 553 of file pub_misc.h.
◆ SCIPhashFour
Definition at line 556 of file pub_misc.h.
◆ SCIPhashFive
Definition at line 559 of file pub_misc.h.
◆ SCIPhashSix
Definition at line 563 of file pub_misc.h.
◆ SCIPhashSeven
Definition at line 567 of file pub_misc.h.
Function Documentation
◆ SCIPrealHashCode()
|
static |
computes a hashcode for double precision floating point values containing 15 significant bits, the sign and the exponent
Definition at line 576 of file pub_misc.h.
References x.
Referenced by SCIP_DECL_HASHKEYVAL().
◆ SCIPhashtableCreate()
SCIP_RETCODE SCIPhashtableCreate | ( | SCIP_HASHTABLE ** | hashtable, |
BMS_BLKMEM * | blkmem, | ||
int | tablesize, | ||
SCIP_DECL_HASHGETKEY((*hashgetkey)) | , | ||
SCIP_DECL_HASHKEYEQ((*hashkeyeq)) | , | ||
SCIP_DECL_HASHKEYVAL((*hashkeyval)) | , | ||
void * | userptr | ||
) |
creates a hash table
- Parameters
-
hashtable pointer to store the created hash table blkmem block memory used to store hash table entries tablesize size of the hash table userptr user pointer
Definition at line 2296 of file misc.c.
References BMSallocBlockMemory, BMSallocBlockMemoryArray, BMSallocClearBlockMemoryArray, LOG2, MAX, NULL, SCIP_ALLOC, and SCIP_OKAY.
Referenced by addOrbitope(), bilinearTermsInsertEntry(), checkConsnames(), collectBranchingCands(), copyConsPseudoboolean(), detectHiddenProducts(), detectRedundantConstraints(), findCumulativeConss(), inithashmapandtable(), mod2matrixPreprocessColumns(), mod2matrixPreprocessRows(), nodepairqueueCreate(), presoldataInitHashtables(), propdataInit(), SCIP_DECL_EVENTINITSOL(), SCIP_DECL_HEUREXEC(), SCIP_DECL_HEURINIT(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_READERREAD(), SCIP_DECL_READERWRITE(), SCIPcliquetableCreate(), SCIPcutpoolCreate(), SCIPparamsetCreate(), SCIPprobCreate(), SCIPvariableGraphCreate(), SCIPvisualizeConsCumulative(), SCIPwriteLp(), SCIPwriteMps(), SCIPwritePip(), and writeOpb().
◆ SCIPhashtableFree()
void SCIPhashtableFree | ( | SCIP_HASHTABLE ** | hashtable | ) |
frees the hash table
- Parameters
-
hashtable pointer to the hash table
Definition at line 2346 of file misc.c.
References BMSfreeBlockMemory, BMSfreeBlockMemoryArray, SCIP_HashTable::hashes, SCIP_HashTable::mask, MAX, SCIP_HashTable::nelements, NULL, SCIP_Real, SCIPdebugMessage, SCIP_HashTable::shift, and SCIP_HashTable::slots.
Referenced by bilinearTermsFree(), checkConsnames(), collectBranchingCands(), conshdlrdataFree(), copyConsPseudoboolean(), detectHiddenProducts(), detectRedundantConstraints(), findCumulativeConss(), freeOrbitope(), freeShadowTree(), mod2matrixPreprocessColumns(), mod2matrixPreprocessRows(), nodepairqueueCreate(), propdataExit(), propdataInit(), SCIP_DECL_HEUREXEC(), SCIP_DECL_HEUREXIT(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLFREE(), SCIP_DECL_READERREAD(), SCIP_DECL_READERWRITE(), SCIPcliquetableFree(), SCIPcutpoolFree(), SCIPparamsetFree(), SCIPprobFree(), SCIPvariableGraphFree(), SCIPvisualizeConsCumulative(), SCIPwriteLp(), SCIPwriteMps(), SCIPwritePip(), and writeOpb().
◆ SCIPhashtableClear()
void SCIPhashtableClear | ( | SCIP_HASHTABLE * | hashtable | ) |
removes all elements of the hash table
- Note
- From a performance point of view you should not fill and clear a hash table too often since the clearing can be expensive. Clearing is done by looping over all buckets and removing the hash table lists one-by-one.
- Deprecated:
- Please use SCIPhashtableRemoveAll()
removes all elements of the hash table
- Note
- From a performance point of view you should not fill and clear a hash table too often since the clearing can be expensive. Clearing is done by looping over all buckets and removing the hash table lists one-by-one.
- Deprecated:
- Please use SCIPhashtableRemoveAll()
- Parameters
-
hashtable hash table
Definition at line 2398 of file misc.c.
References SCIPhashtableRemoveAll().
◆ SCIPhashtableInsert()
SCIP_RETCODE SCIPhashtableInsert | ( | SCIP_HASHTABLE * | hashtable, |
void * | element | ||
) |
inserts element in hash table (multiple inserts of same element override the previous entry)
inserts element in hash table
- Note
- multiple inserts of same element overrides previous one
- Parameters
-
hashtable hash table element element to insert into the table
Definition at line 2547 of file misc.c.
References SCIP_HashTable::hashes, hashtableCheckLoad(), hashtableInsert(), hashvalue(), SCIP_HashTable::mask, NULL, SCIP_CALL, SCIP_HashTable::slots, TRUE, and SCIP_HashTable::userptr.
Referenced by addConflictBinvar(), bilinearTermsInsertEntry(), checkConsnames(), cleanupHashDatas(), collectAggregatedVars(), collectBranchingCands(), collectMinactImplicVars(), copyConsPseudoboolean(), correctPresoldata(), createAndAddAndCons(), createConstantAssignment(), createPresoldata(), createVariable(), detectRedundantConstraints(), determineVariableFixings(), fillRelationTables(), findCumulativeConss(), getConflictImplics(), mod2matrixPreprocessColumns(), mod2matrixPreprocessRows(), nodepairqueueCreate(), retrieveParallelConstraints(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_EVENTINITSOL(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_READERWRITE(), SCIPcliquetableAdd(), SCIPcliquetableCleanup(), SCIPcreateConsPseudobooleanWithConss(), SCIPcutpoolAddNewRow(), SCIPprobAddConsName(), SCIPprobAddVarName(), SCIPvariablegraphBreadthFirst(), SCIPvisualizeConsCumulative(), SCIPwriteMps(), selectSolsRandomized(), setupAndSolveSubscipCrossover(), writeOpbFixedVars(), and writeOpbRelevantAnds().
◆ SCIPhashtableSafeInsert()
SCIP_RETCODE SCIPhashtableSafeInsert | ( | SCIP_HASHTABLE * | hashtable, |
void * | element | ||
) |
inserts element in hash table (multiple insertion of same element is checked and results in an error)
inserts element in hash table
- Note
- multiple insertion of same element is checked and results in an error
- Parameters
-
hashtable hash table element element to insert into the table
Definition at line 2579 of file misc.c.
References FALSE, SCIP_HashTable::hashes, hashtableCheckLoad(), hashtableInsert(), hashvalue(), SCIP_HashTable::mask, NULL, SCIP_CALL, SCIP_HashTable::slots, and SCIP_HashTable::userptr.
Referenced by paramsetAdd(), retrieveParallelConstraints(), SCIP_DECL_EVENTEXEC(), and SCIP_DECL_HEUREXEC().
◆ SCIPhashtableRetrieve()
void * SCIPhashtableRetrieve | ( | SCIP_HASHTABLE * | hashtable, |
void * | key | ||
) |
retrieve element with key from hash table, returns NULL if not existing
- Parameters
-
hashtable hash table key key to retrieve
Definition at line 2608 of file misc.c.
References ELEM_DISTANCE, SCIP_HashTable::hashes, hashvalue(), SCIP_HashTable::mask, NULL, SCIP_HashTable::shift, SCIP_HashTable::slots, TRUE, and SCIP_HashTable::userptr.
Referenced by applyVariableAssignment(), cancelCol(), cancelRow(), checkConsnames(), consdataFree(), CREATE_CONSTRAINT(), createAndAddAndCons(), createConstantAssignment(), createLinking(), createVariable(), detectProductsUnconditional(), detectRedundantConstraints(), extractGates(), fillRelationTables(), getRowOrder(), mod2matrixPreprocessColumns(), mod2matrixPreprocessRows(), nodepairqueueCreate(), paramSetBool(), paramSetChar(), paramSetInt(), paramSetLongint(), paramSetReal(), paramsetSetHeuristicsAggressive(), paramsetSetHeuristicsFast(), paramsetSetPresolvingAggressive(), paramsetSetPresolvingFast(), paramsetSetSeparatingAggressive(), paramsetSetSeparatingDefault(), parseAggregation(), parseArrayIndex(), parseConstraint(), parseQuadratic(), parseSolveItem(), parseValue(), parseVariableArrayAssignment(), populateRootedPathColumnOrder(), retrieveParallelConstraints(), scalePenalties(), SCIP_DECL_HEUREXEC(), SCIP_DECL_PRESOLEXEC(), SCIPcliquetableAdd(), SCIPcliquetableCleanup(), SCIPcreateConsPseudobooleanWithConss(), SCIPcutpoolAddRow(), SCIPcutpoolDelRow(), SCIPcutpoolIsCutNew(), SCIPgetBilinTermIdxNonlinear(), SCIPhashtableExists(), SCIPparamsetCopyParams(), SCIPparamsetFix(), SCIPparamsetGetBool(), SCIPparamsetGetChar(), SCIPparamsetGetInt(), SCIPparamsetGetLongint(), SCIPparamsetGetParam(), SCIPparamsetGetReal(), SCIPparamsetGetString(), SCIPparamsetIsFixed(), SCIPparamsetSet(), SCIPparamsetSetBool(), SCIPparamsetSetChar(), SCIPparamsetSetDefaultBool(), SCIPparamsetSetDefaultChar(), SCIPparamsetSetDefaultInt(), SCIPparamsetSetDefaultLongint(), SCIPparamsetSetDefaultReal(), SCIPparamsetSetDefaultString(), SCIPparamsetSetEmphasis(), SCIPparamsetSetInt(), SCIPparamsetSetLongint(), SCIPparamsetSetReal(), SCIPparamsetSetString(), SCIPparamsetSetToDefault(), SCIPprobFindCons(), SCIPprobFindVar(), SCIPprobRemoveConsName(), SCIPshadowTreeGetShadowNodeFromNodeNumber(), and transformToOrig().
◆ SCIPhashtableExists()
SCIP_Bool SCIPhashtableExists | ( | SCIP_HASHTABLE * | hashtable, |
void * | element | ||
) |
returns whether the given element exists in the table
- Parameters
-
hashtable hash table element element to search in the table
Definition at line 2659 of file misc.c.
References SCIP_HashTable::hashes, SCIP_HashTable::mask, NULL, SCIPhashtableRetrieve(), SCIP_HashTable::slots, and SCIP_HashTable::userptr.
Referenced by addConflictBinvar(), cleanupHashDatas(), collectAggregatedVars(), collectBranchingCands(), collectMinactImplicVars(), consdataFree(), copyConsPseudoboolean(), correctConshdlrdata(), correctPresoldata(), cutpoolDelCut(), determineVariableFixings(), findCumulativeConss(), getConflictImplics(), mod2matrixPreprocessRows(), printBoundSection(), printColumnSection(), resolvePropagation(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_PRESOLEXIT(), SCIP_DECL_READERWRITE(), SCIPcutpoolAddNewRow(), SCIPprobRemoveVarName(), SCIPvariablegraphBreadthFirst(), SCIPvisualizeConsCumulative(), SCIPwriteMps(), selectSolsRandomized(), transformToOrig(), updateConsanddataUses(), and writeOpbFixedVars().
◆ SCIPhashtableRemove()
SCIP_RETCODE SCIPhashtableRemove | ( | SCIP_HASHTABLE * | hashtable, |
void * | element | ||
) |
removes element from the hash table, if it exists
- Parameters
-
hashtable hash table element element to remove from the table
Definition at line 2677 of file misc.c.
References ELEM_DISTANCE, SCIP_HashTable::hashes, hashvalue(), SCIP_HashTable::mask, SCIP_HashTable::nelements, NULL, SCIP_OKAY, SCIP_HashTable::shift, SCIP_HashTable::slots, TRUE, and SCIP_HashTable::userptr.
Referenced by cleanupHashDatas(), consdataFree(), correctConshdlrdata(), correctPresoldata(), cutpoolDelCut(), detectRedundantConstraints(), extractGates(), mod2matrixPreprocessRows(), retrieveParallelConstraints(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXIT(), SCIPcliquetableCleanup(), SCIPprobRemoveConsName(), SCIPprobRemoveVarName(), and updateConsanddataUses().
◆ SCIPhashtableRemoveAll()
void SCIPhashtableRemoveAll | ( | SCIP_HASHTABLE * | hashtable | ) |
removes all elements of the hash table
- Parameters
-
hashtable hash table
Definition at line 2755 of file misc.c.
References BMSclearMemoryArray, SCIP_HashTable::hashes, SCIP_HashTable::mask, SCIP_HashTable::nelements, and NULL.
Referenced by correctPresoldata(), resolvePropagation(), SCIP_DECL_PRESOLEXEC(), SCIP_DECL_PRESOLEXIT(), SCIPcutpoolClear(), SCIPhashtableClear(), and SCIPvariablegraphBreadthFirst().
◆ SCIPhashtableGetNElements()
SCIP_Longint SCIPhashtableGetNElements | ( | SCIP_HASHTABLE * | hashtable | ) |
returns number of hash table elements
- Parameters
-
hashtable hash table
Definition at line 2767 of file misc.c.
References SCIP_HashTable::nelements, and NULL.
Referenced by SCIP_DECL_HEUREXEC().
◆ SCIPhashtableGetNEntries()
int SCIPhashtableGetNEntries | ( | SCIP_HASHTABLE * | hashtable | ) |
gives the number of entries in the internal arrays of a hash table
- Parameters
-
hashtable hash table
Definition at line 2777 of file misc.c.
References SCIP_HashTable::mask.
Referenced by detectHiddenProducts(), freeOrbitope(), freeShadowTree(), and SCIP_DECL_PRESOLEXEC().
◆ SCIPhashtableGetEntry()
void * SCIPhashtableGetEntry | ( | SCIP_HASHTABLE * | hashtable, |
int | entryidx | ||
) |
gives the element at the given index or NULL if entry at that index has no element
- Parameters
-
hashtable hash table entryidx index of hash table entry
Definition at line 2785 of file misc.c.
References SCIP_HashTable::hashes, NULL, and SCIP_HashTable::slots.
Referenced by detectHiddenProducts(), freeOrbitope(), and freeShadowTree().
◆ SCIPhashtableGetLoad()
SCIP_Real SCIPhashtableGetLoad | ( | SCIP_HASHTABLE * | hashtable | ) |
returns the load of the given hash table in percentage
- Parameters
-
hashtable hash table
Definition at line 2794 of file misc.c.
References SCIP_HashTable::mask, SCIP_HashTable::nelements, NULL, and SCIP_Real.
◆ SCIPhashtablePrintStatistics()
void SCIPhashtablePrintStatistics | ( | SCIP_HASHTABLE * | hashtable, |
SCIP_MESSAGEHDLR * | messagehdlr | ||
) |
prints statistics about hash table usage
- Parameters
-
hashtable hash table messagehdlr message handler
Definition at line 2804 of file misc.c.
References ELEM_DISTANCE, SCIP_HashTable::hashes, SCIP_HashTable::mask, MAX, SCIP_HashTable::nelements, NULL, SCIP_Real, and SCIPmessagePrintInfo().
Referenced by detectRedundantConstraints().