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/**CFile****************************************************************
FileName [sscUtil.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [SAT sweeping under constraints.]
Synopsis [Various utilities.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 29, 2008.]
Revision [$Id: sscUtil.c,v 1.00 2008/07/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sscInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
typedef struct Hsh_Obj_t_ Hsh_Obj_t;
struct Hsh_Obj_t_
{
int iThis;
int iNext;
};
typedef struct Hsh_Man_t_ Hsh_Man_t;
struct Hsh_Man_t_
{
unsigned * pData; // user's data
int * pTable; // hash table
Hsh_Obj_t * pObjs;
int nObjs;
int nSize;
int nTableSize;
};
static inline unsigned * Hsh_ObjData( Hsh_Man_t * p, int iThis ) { return p->pData + p->nSize * iThis; }
static inline Hsh_Obj_t * Hsh_ObjGet( Hsh_Man_t * p, int iObj ) { return iObj == -1 ? NULL : p->pObjs + iObj; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Hsh_Man_t * Hsh_ManStart( unsigned * pData, int nDatas, int nSize )
{
Hsh_Man_t * p;
p = ABC_CALLOC( Hsh_Man_t, 1 );
p->pData = pData;
p->nSize = nSize;
p->nTableSize = Abc_PrimeCudd( nDatas );
p->pTable = ABC_FALLOC( int, p->nTableSize );
p->pObjs = ABC_FALLOC( Hsh_Obj_t, p->nTableSize );
return p;
}
void Hsh_ManStop( Hsh_Man_t * p )
{
ABC_FREE( p->pObjs );
ABC_FREE( p->pTable );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Hsh_ManHash( unsigned * pData, int nSize, int nTableSize )
{
static unsigned s_BigPrimes[7] = {12582917, 25165843, 50331653, 100663319, 201326611, 402653189, 805306457};
unsigned char * pDataC = (unsigned char *)pData;
int c, nChars = nSize * 4, Key = 0;
for ( c = 0; c < nChars; c++ )
Key += pDataC[c] * s_BigPrimes[c % 7];
return Key % nTableSize;
}
int Hsh_ManAdd( Hsh_Man_t * p, int iThis )
{
Hsh_Obj_t * pObj;
unsigned * pThis = Hsh_ObjData( p, iThis );
int * pPlace = p->pTable + Hsh_ManHash( pThis, p->nSize, p->nTableSize );
for ( pObj = Hsh_ObjGet(p, *pPlace); pObj; pObj = Hsh_ObjGet(p, pObj->iNext) )
if ( !memcmp( pThis, Hsh_ObjData(p, pObj->iThis), sizeof(unsigned) * p->nSize ) )
return pObj - p->pObjs;
assert( p->nObjs < p->nTableSize );
pObj = p->pObjs + p->nObjs;
pObj->iThis = iThis;
return (*pPlace = p->nObjs++);
}
/**Function*************************************************************
Synopsis [Hashes data by value.]
Description [Array of 'nTotal' int entries, each of size 'nSize' ints,
is hashed and the resulting unique numbers is returned in the array.]
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Hsh_ManHashData( unsigned * pData, int nDatas, int nSize, int nInts )
{
Vec_Int_t * vRes;
Hsh_Man_t * p;
int i;
assert( nDatas * nSize == nInts );
p = Hsh_ManStart( pData, nDatas, nSize );
vRes = Vec_IntAlloc( 1000 );
for ( i = 0; i < nDatas; i++ )
Vec_IntPush( vRes, Hsh_ManAdd(p, i) );
Hsh_ManStop( p );
return vRes;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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