nmTable.c File Reference

#include "nmInt.h"

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Functions
int	Nm_ManTableAdd (Nm_Man_t *p, Nm_Entry_t *pEntry)
	FUNCTION DEFINITIONS ///.
int	Nm_ManTableDelete (Nm_Man_t *p, int ObjId)
Nm_Entry_t *	Nm_ManTableLookupId (Nm_Man_t *p, int ObjId)
Nm_Entry_t *	Nm_ManTableLookupName (Nm_Man_t *p, char *pName, int Type)
void	Nm_ManProfile (Nm_Man_t *p)

Function Documentation

Nm_ManProfile()

void Nm_ManProfile

(

Nm_Man_t *

p

)

Function*************************************************************

Synopsis [Profiles hash tables.]

Description []

SideEffects []

SeeAlso []

Definition at line 221 of file nmTable.c.

{
    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" );
}

Nm_ManTableAdd()

int Nm_ManTableAdd	(	Nm_Man_t *	p,
		Nm_Entry_t *	pEntry )

FUNCTION DEFINITIONS ///.

MACRO DEFINITIONS ///.

Function*************************************************************

Synopsis [Adds an entry to two hash tables.]

Description []

SideEffects []

SeeAlso []

Definition at line 71 of file nmTable.c.

{
    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;
}

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Nm_ManTableDelete()

int Nm_ManTableDelete	(	Nm_Man_t *	p,
		int	ObjId )

Function*************************************************************

Synopsis [Deletes the entry from two hash tables.]

Description []

SideEffects []

SeeAlso []

Definition at line 112 of file nmTable.c.

{
    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;
}

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Nm_ManTableLookupId()

Nm_Entry_t * Nm_ManTableLookupId	(	Nm_Man_t *	p,
		int	ObjId )

Function*************************************************************

Synopsis [Looks up the entry by ID.]

Description []

SideEffects []

SeeAlso []

Definition at line 171 of file nmTable.c.

{
    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;
}

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Nm_ManTableLookupName()

Nm_Entry_t * Nm_ManTableLookupName	(	Nm_Man_t *	p,
		char *	pName,
		int	Type )

Function*************************************************************

Synopsis [Looks up the entry by name and type.]

Description []

SideEffects []

SeeAlso []

Definition at line 191 of file nmTable.c.

{
    Nm_Entry_t * pEntry, * pTemp;
    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;
}

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