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authorAlan Mishchenko <alanmi@berkeley.edu>2007-09-30 08:01:00 -0700
committerAlan Mishchenko <alanmi@berkeley.edu>2007-09-30 08:01:00 -0700
commite54d9691616b9a0326e2fdb3156bb4eeb8abfcd7 (patch)
treede3ffe87c3e17950351e3b7d97fa18318bd5ea9a /src/misc/nm/nmTable.c
parent7d7e60f2dc84393cd4c5db22d2eaf7b1fb1a79b2 (diff)
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Version abc70930
Diffstat (limited to 'src/misc/nm/nmTable.c')
-rw-r--r--src/misc/nm/nmTable.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/src/misc/nm/nmTable.c b/src/misc/nm/nmTable.c
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-/**CFile****************************************************************
-
- FileName [nmTable.c]
-
- SystemName [ABC: Logic synthesis and verification system.]
-
- PackageName [Name manager.]
-
- Synopsis [Hash table for the name manager.]
-
- Author [Alan Mishchenko]
-
- Affiliation [UC Berkeley]
-
- Date [Ver. 1.0. Started - June 20, 2005.]
-
- Revision [$Id: nmTable.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
-
-***********************************************************************/
-
-#include "nmInt.h"
-
-////////////////////////////////////////////////////////////////////////
-/// DECLARATIONS ///
-////////////////////////////////////////////////////////////////////////
-
-// hashing for integers
-static unsigned Nm_HashNumber( int Num, int TableSize )
-{
- unsigned Key = 0;
- Key ^= ( Num & 0xFF) * 7937;
- Key ^= ((Num >> 8) & 0xFF) * 2971;
- Key ^= ((Num >> 16) & 0xFF) * 911;
- Key ^= ((Num >> 24) & 0xFF) * 353;
- return Key % TableSize;
-}
-
-// hashing for strings
-static unsigned Nm_HashString( char * pName, int TableSize )
-{
- static int s_Primes[10] = {
- 1291, 1699, 2357, 4177, 5147,
- 5647, 6343, 7103, 7873, 8147
- };
- unsigned i, Key = 0;
- for ( i = 0; pName[i] != '\0'; i++ )
- Key ^= s_Primes[i%10]*pName[i]*pName[i];
- return Key % TableSize;
-}
-
-static void Nm_ManResize( Nm_Man_t * p );
-
-////////////////////////////////////////////////////////////////////////
-/// FUNCTION DEFINITIONS ///
-////////////////////////////////////////////////////////////////////////
-
-/**Function*************************************************************
-
- Synopsis [Adds an entry to two hash tables.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Nm_ManTableAdd( Nm_Man_t * p, Nm_Entry_t * pEntry )
-{
- Nm_Entry_t ** ppSpot, * pOther;
- // resize the tables if needed
- if ( p->nEntries > p->nBins * p->nSizeFactor )
- Nm_ManResize( p );
- // add the entry to the table Id->Name
- assert( Nm_ManTableLookupId(p, pEntry->ObjId) == NULL );
- ppSpot = p->pBinsI2N + Nm_HashNumber(pEntry->ObjId, p->nBins);
- pEntry->pNextI2N = *ppSpot;
- *ppSpot = pEntry;
- // check if an entry with the same name already exists
- if ( pOther = Nm_ManTableLookupName(p, pEntry->Name, -1) )
- {
- // entry with the same name already exists - add it to the ring
- pEntry->pNameSake = pOther->pNameSake? pOther->pNameSake : pOther;
- pOther->pNameSake = pEntry;
- }
- else
- {
- // entry with the same name does not exist - add it to the table
- ppSpot = p->pBinsN2I + Nm_HashString(pEntry->Name, p->nBins);
- pEntry->pNextN2I = *ppSpot;
- *ppSpot = pEntry;
- }
- // report successfully added entry
- p->nEntries++;
- return 1;
-}
-
-/**Function*************************************************************
-
- Synopsis [Deletes the entry from two hash tables.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Nm_ManTableDelete( Nm_Man_t * p, int ObjId )
-{
- Nm_Entry_t ** ppSpot, * pEntry, * pPrev;
- int fRemoved;
- p->nEntries--;
- // remove the entry from the table Id->Name
- assert( Nm_ManTableLookupId(p, ObjId) != NULL );
- ppSpot = p->pBinsI2N + Nm_HashNumber(ObjId, p->nBins);
- while ( (*ppSpot)->ObjId != (unsigned)ObjId )
- ppSpot = &(*ppSpot)->pNextI2N;
- pEntry = *ppSpot;
- *ppSpot = (*ppSpot)->pNextI2N;
- // remove the entry from the table Name->Id
- ppSpot = p->pBinsN2I + Nm_HashString(pEntry->Name, p->nBins);
- while ( *ppSpot && *ppSpot != pEntry )
- ppSpot = &(*ppSpot)->pNextN2I;
- // remember if we found this one in the list
- fRemoved = (*ppSpot != NULL);
- if ( *ppSpot )
- {
- assert( *ppSpot == pEntry );
- *ppSpot = (*ppSpot)->pNextN2I;
- }
- // quit if this entry has no namesakes
- if ( pEntry->pNameSake == NULL )
- {
- assert( fRemoved );
- return 1;
- }
- // remove entry from the ring of namesakes
- assert( pEntry->pNameSake != pEntry );
- for ( pPrev = pEntry; pPrev->pNameSake != pEntry; pPrev = pPrev->pNameSake );
- assert( !strcmp(pPrev->Name, pEntry->Name) );
- assert( pPrev->pNameSake == pEntry );
- if ( pEntry->pNameSake == pPrev ) // two entries in the ring
- pPrev->pNameSake = NULL;
- else
- pPrev->pNameSake = pEntry->pNameSake;
- // reinsert the ring back if we removed its connection with the list in the table
- if ( fRemoved )
- {
- assert( pPrev->pNextN2I == NULL );
- pPrev->pNextN2I = *ppSpot;
- *ppSpot = pPrev;
- }
- return 1;
-}
-
-/**Function*************************************************************
-
- Synopsis [Looks up the entry by ID.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Nm_Entry_t * Nm_ManTableLookupId( Nm_Man_t * p, int ObjId )
-{
- Nm_Entry_t * pEntry;
- for ( pEntry = p->pBinsI2N[ Nm_HashNumber(ObjId, p->nBins) ]; pEntry; pEntry = pEntry->pNextI2N )
- if ( pEntry->ObjId == (unsigned)ObjId )
- return pEntry;
- return NULL;
-}
-
-/**Function*************************************************************
-
- Synopsis [Looks up the entry by name and type.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Nm_Entry_t * Nm_ManTableLookupName( Nm_Man_t * p, char * pName, int Type )
-{
- Nm_Entry_t * pEntry, * pTemp;
- int Counter = 0;
- for ( pEntry = p->pBinsN2I[ Nm_HashString(pName, p->nBins) ]; pEntry; pEntry = pEntry->pNextN2I )
- {
- // check the entry itself
- if ( !strcmp(pEntry->Name, pName) && (Type == -1 || pEntry->Type == (unsigned)Type) )
- return pEntry;
- // if there is no namesakes, continue
- if ( pEntry->pNameSake == NULL )
- continue;
- // check the list of namesakes
- for ( pTemp = pEntry->pNameSake; pTemp != pEntry; pTemp = pTemp->pNameSake )
- if ( !strcmp(pTemp->Name, pName) && (Type == -1 || pTemp->Type == (unsigned)Type) )
- return pTemp;
- }
- return NULL;
-}
-
-/**Function*************************************************************
-
- Synopsis [Profiles hash tables.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Nm_ManProfile( Nm_Man_t * p )
-{
- Nm_Entry_t * pEntry;
- int Counter, e;
- printf( "I2N table: " );
- for ( e = 0; e < p->nBins; e++ )
- {
- Counter = 0;
- for ( pEntry = p->pBinsI2N[e]; pEntry; pEntry = pEntry->pNextI2N )
- Counter++;
- printf( "%d ", Counter );
- }
- printf( "\n" );
- printf( "N2I table: " );
- for ( e = 0; e < p->nBins; e++ )
- {
- Counter = 0;
- for ( pEntry = p->pBinsN2I[e]; pEntry; pEntry = pEntry->pNextN2I )
- Counter++;
- printf( "%d ", Counter );
- }
- printf( "\n" );
-}
-
-/**Function*************************************************************
-
- Synopsis [Resizes the table.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Nm_ManResize( Nm_Man_t * p )
-{
- Nm_Entry_t ** pBinsNewI2N, ** pBinsNewN2I, * pEntry, * pEntry2, ** ppSpot;
- int nBinsNew, Counter, e, clk;
-
-clk = clock();
- // get the new table size
- nBinsNew = Cudd_PrimeCopy( p->nGrowthFactor * p->nBins );
- // allocate a new array
- pBinsNewI2N = ALLOC( Nm_Entry_t *, nBinsNew );
- pBinsNewN2I = ALLOC( Nm_Entry_t *, nBinsNew );
- memset( pBinsNewI2N, 0, sizeof(Nm_Entry_t *) * nBinsNew );
- memset( pBinsNewN2I, 0, sizeof(Nm_Entry_t *) * nBinsNew );
- // rehash entries in Id->Name table
- Counter = 0;
- for ( e = 0; e < p->nBins; e++ )
- for ( pEntry = p->pBinsI2N[e], pEntry2 = pEntry? pEntry->pNextI2N : NULL;
- pEntry; pEntry = pEntry2, pEntry2 = pEntry? pEntry->pNextI2N : NULL )
- {
- ppSpot = pBinsNewI2N + Nm_HashNumber(pEntry->ObjId, nBinsNew);
- pEntry->pNextI2N = *ppSpot;
- *ppSpot = pEntry;
- Counter++;
- }
- // rehash entries in Name->Id table
- for ( e = 0; e < p->nBins; e++ )
- for ( pEntry = p->pBinsN2I[e], pEntry2 = pEntry? pEntry->pNextN2I : NULL;
- pEntry; pEntry = pEntry2, pEntry2 = pEntry? pEntry->pNextN2I : NULL )
- {
- ppSpot = pBinsNewN2I + Nm_HashString(pEntry->Name, nBinsNew);
- pEntry->pNextN2I = *ppSpot;
- *ppSpot = pEntry;
- }
- assert( Counter == p->nEntries );
-// printf( "Increasing the structural table size from %6d to %6d. ", p->nBins, nBinsNew );
-// PRT( "Time", clock() - clk );
- // replace the table and the parameters
- free( p->pBinsI2N );
- free( p->pBinsN2I );
- p->pBinsI2N = pBinsNewI2N;
- p->pBinsN2I = pBinsNewN2I;
- p->nBins = nBinsNew;
-// Nm_ManProfile( p );
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Returns the smallest prime larger than the number.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-unsigned int Cudd_PrimeNm( unsigned int p)
-{
- int i,pn;
-
- p--;
- do {
- p++;
- if (p&1) {
- pn = 1;
- i = 3;
- while ((unsigned) (i * i) <= p) {
- if (p % i == 0) {
- pn = 0;
- break;
- }
- i += 2;
- }
- } else {
- pn = 0;
- }
- } while (!pn);
- return(p);
-
-} /* end of Cudd_Prime */
-
-////////////////////////////////////////////////////////////////////////
-/// END OF FILE ///
-////////////////////////////////////////////////////////////////////////
-
-