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|
/**CFile****************************************************************
FileName [ntlNames.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Netlist representation.]
Synopsis [Data-structure for storing hiNamrchical object names.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: ntlNames.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "ntl.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
// name object
typedef struct Ntl_ObjNam_t_ Ntl_ObjNam_t;
struct Ntl_ObjNam_t_
{
int iPrev; // prefix of this name
int iNext; // the next name in the hash table
char pName[0]; // name characters
};
// name manager
typedef struct Ntl_ManNam_t_ Ntl_ManNam_t;
struct Ntl_ManNam_t_
{
// info storage for names
char * pStore; // storage for name objects
int nStore; // the size of allocated storage
int iHandle; // the current free handle
int nHandles; // the number of handles
int nRefs; // reference counter for the manager
// hash table for names
int nBins;
unsigned * pBins;
// temporaries
Vec_Str_t * vName; // storage for returned name
};
static inline Ntl_ObjNam_t * Ntl_ManNamObj( Ntl_ManNam_t * p, int h ) { assert( !(h & 3) ); return (Ntl_ObjNam_t *)(p->pStore + h); }
static inline int Ntl_ManNamObjHandle( Ntl_ManNam_t * p, Ntl_ObjNam_t * pObj ) { return ((char *)pObj) - p->pStore; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Creates manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ntl_ManNam_t * Ntl_ManNamStart()
{
Ntl_ManNam_t * p;
p = ABC_CALLOC( Ntl_ManNam_t, 1 );
p->nStore = (1 << 20);
p->pStore = ABC_ALLOC( char, p->nStore );
p->iHandle = 4;
p->nBins = Aig_PrimeCudd( 500000 );
p->pBins = ABC_CALLOC( unsigned, p->nBins );
p->vName = Vec_StrAlloc( 1000 );
return p;
}
/**Function*************************************************************
Synopsis [Deletes manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ntl_ManNamStop( Ntl_ManNam_t * p )
{
Vec_StrFree( p->vName );
ABC_FREE( p->pStore );
ABC_FREE( p->pBins );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis [Deletes manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ntl_ManNamReportMemUsage( Ntl_ManNam_t * p )
{
return sizeof(Ntl_ManNam_t) + p->nStore + sizeof(int) * p->nBins + sizeof(int) * Vec_StrSize(p->vName);
}
/**Function*************************************************************
Synopsis [References the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ntl_ManNamRef( Ntl_ManNam_t * p )
{
p->nRefs++;
}
/**Function*************************************************************
Synopsis [Dereferences the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ntl_ManNamDeref( Ntl_ManNam_t * p )
{
if ( --p->nRefs == 0 )
Ntl_ManNamStop( p );
}
/**Function*************************************************************
Synopsis [Returns object with the given handle.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
/**Function*************************************************************
Synopsis [Computes hash value of the node using its simulation info.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ntl_ManNamStrHash( char * pStr, int Length, int nTableSize )
{
static int s_FPrimes[128] = {
1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459,
1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997,
2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543,
2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089,
3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671,
3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243,
4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871,
4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471,
5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073,
6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689,
6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309,
7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933,
8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147
};
unsigned uHash;
int i;
uHash = 0;
for ( i = 0; i < Length; i++ )
if ( i & 1 )
uHash *= pStr[i] * s_FPrimes[i & 0x7F];
else
uHash ^= pStr[i] * s_FPrimes[i & 0x7F];
return uHash % nTableSize;
}
/**Function*************************************************************
Synopsis [Compares two strings to be equal.]
Description [Returns 1 if the strings match.]
SideEffects []
SeeAlso []
***********************************************************************/
int Ntl_ManNamStrCompare_rec( Ntl_ManNam_t * p, char * pStr, int Length, Ntl_ObjNam_t * pThis )
{
Ntl_ObjNam_t * pNext = (pThis->iPrev)? Ntl_ManNamObj(p, pThis->iPrev) : NULL;
int LengthNew = strlen(pThis->pName);
if ( !strncmp( pThis->pName, pStr + Length - LengthNew, LengthNew ) )
return 0;
if ( pNext == NULL )
return 1;
return Ntl_ManNamStrCompare_rec( p, pStr, Length - LengthNew, pNext );
}
/**Function*************************************************************
Synopsis [Returns the place of this state in the table or NULL if it exists.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline unsigned * Ntl_ManNamStrHashFind( Ntl_ManNam_t * p, char * pStr, int Length, int * pHandle )
{
Ntl_ObjNam_t * pThis;
unsigned * pPlace = p->pBins + Ntl_ManNamStrHash( pStr, Length, p->nBins );
for ( pThis = (*pPlace)? Ntl_ManNamObj(p, *pPlace) : NULL; pThis;
pPlace = (unsigned *)&pThis->iNext, pThis = (*pPlace)? Ntl_ManNamObj(p, *pPlace) : NULL )
if ( !Ntl_ManNamStrCompare_rec( p, pStr, Length, pThis ) )
{
*pHandle = Ntl_ManNamObjHandle( p, pThis );
return NULL;
}
*pHandle = -1;
return pPlace;
}
/**Function*************************************************************
Synopsis [Resizes the hash table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ntl_ManNamStrHashResize( Ntl_ManNam_t * p )
{
Ntl_ObjNam_t * pThis;
unsigned * pBinsOld, * piPlace;
int nBinsOld, iNext, iHandle, Counter, i;
assert( p->pBins != NULL );
// replace the table
pBinsOld = p->pBins;
nBinsOld = p->nBins;
p->nBins = Aig_PrimeCudd( 3 * p->nBins );
p->pBins = ABC_CALLOC( unsigned, p->nBins );
// rehash the entries from the old table
Counter = 0;
for ( i = 0; i < nBinsOld; i++ )
for ( pThis = (pBinsOld[i]? Ntl_ManNamObj(p, pBinsOld[i]) : NULL),
iNext = (pThis? pThis->iNext : 0);
pThis; pThis = (iNext? Ntl_ManNamObj(p, iNext) : NULL),
iNext = (pThis? pThis->iNext : 0) )
{
pThis->iNext = 0;
piPlace = Ntl_ManNamStrHashFind( p, pThis->pName, strlen(pThis->pName), &iHandle );
assert( *piPlace == 0 ); // should not be there
*piPlace = Ntl_ManNamObjHandle( p, pThis );
Counter++;
}
assert( Counter == p->nHandles );
ABC_FREE( pBinsOld );
}
/**Function*************************************************************
Synopsis [Returns the handle of a new object to represent the name.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ntl_ManNamStrGrow_rec( Ntl_ManNam_t * p, char * pStr, int Length, unsigned * piPlace )
{
Ntl_ObjNam_t * pThis;
char * pStrNew;
int Separ, LengthNew;
int iHandle;
assert( Length > 0 );
// find the separator symbol
for ( Separ = Length - 2; Separ >= 0 && pStr[Separ] != '/'; Separ-- );
pStrNew = (Separ == -1) ? pStr : pStr + Separ + 1;
LengthNew = Length - (pStrNew - pStr);
// realloc memory if needed
if ( p->iHandle + (int)sizeof(Ntl_ObjNam_t) + LengthNew+5 > p->nStore )
{
int OffSet;
if ( (char *)piPlace > p->pStore && (char *)piPlace < p->pStore + p->nStore )
OffSet = (char *)piPlace - p->pStore;
else
OffSet = -1;
p->nStore *= 2;
p->pStore = ABC_REALLOC( char, p->pStore, p->nStore );
if ( OffSet >= 0 )
piPlace = (unsigned *)(p->pStore + OffSet);
}
// new entry is created
p->nHandles++;
*piPlace = p->iHandle;
pThis = Ntl_ManNamObj( p, p->iHandle );
p->iHandle += sizeof(Ntl_ObjNam_t) + 4 * Aig_BitWordNum( 8*(LengthNew+1) );
pThis->iNext = 0;
pThis->iPrev = 0;
strncpy( pThis->pName, pStrNew, LengthNew );
pThis->pName[LengthNew] = 0;
// expand hash table if needed
// if ( p->nHandles > 2 * p->nBins )
// Ntl_ManNamStrHashResize( p );
// create previous object if needed
if ( Separ >= 0 )
{
assert( pStr[Separ] == '/' );
Separ++;
piPlace = Ntl_ManNamStrHashFind( p, pStr, Separ, &iHandle );
if ( piPlace != NULL )
iHandle = Ntl_ManNamStrGrow_rec( p, pStr, Separ, piPlace );
pThis->iPrev = iHandle;
}
return Ntl_ManNamObjHandle( p, pThis );
}
/**Function*************************************************************
Synopsis [Finds or adds the given name to storage.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ntl_ManNamStrFind( Ntl_ManNam_t * p, char * pStr )
{
int iHandle;
Ntl_ManNamStrHashFind( p, pStr, strlen(pStr), &iHandle );
return iHandle;
}
/**Function*************************************************************
Synopsis [Finds or adds the given name to storage.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned Ntl_ManNamStrFindOrAdd( Ntl_ManNam_t * p, char * pStr )
{
unsigned * piPlace;
int iHandle, Length = strlen(pStr);
assert( Length > 0 );
piPlace = Ntl_ManNamStrHashFind( p, pStr, Length, &iHandle );
if ( piPlace == NULL )
return iHandle;
assert( *piPlace == 0 );
return Ntl_ManNamStrGrow_rec( p, pStr, Length, piPlace );
}
/**Function*************************************************************
Synopsis [Returns name from handle.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
char * Ntl_ManNamStr( Ntl_ManNam_t * p, int h )
{
Ntl_ObjNam_t * pObj;
int k;
assert( h && h < p->iHandle );
Vec_StrClear( p->vName );
for ( pObj = Ntl_ManNamObj( p, h ); pObj; pObj = pObj->iPrev ? Ntl_ManNamObj(p, pObj->iPrev) : NULL )
for ( k = strlen(pObj->pName) - 1; k >= 0; k-- )
Vec_StrPush( p->vName, pObj->pName[k] );
Vec_StrReverseOrder( p->vName );
Vec_StrPush( p->vName, 0 );
return Vec_StrArray( p->vName );
}
/**Function*************************************************************
Synopsis [Testing procedure for the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ntl_ManNamTest( Ntl_Man_t * pNtl )
{
Ntl_ManNam_t * p;
Ntl_Mod_t * pRoot;
Ntl_Net_t * pNet;
int Memory;
int i, iHandle;
int clk = clock();
p = Ntl_ManNamStart();
printf( "a" );
Memory = 0;
pRoot = Ntl_ManRootModel( pNtl );
Ntl_ModelForEachNet( pRoot, pNet, i )
{
Memory += strlen(pNet->pName) + 1;
iHandle = Ntl_ManNamStrFindOrAdd( p, pNet->pName );
// printf( "Before = %s\n", pNet->pName );
// printf( "After = %s\n", Ntl_ManNamStr(p, iHandle) );
}
printf( "Net =%7d. Handle =%8d. ", Vec_PtrSize(pRoot->vNets), p->nHandles );
printf( "Mem old = %7.2f Mb. Mem new = %7.2f Mb.\n",
1.0 * Memory / (1 << 20), 1.0 * Ntl_ManNamReportMemUsage(p) / (1 << 20) );
ABC_PRT( "Time", clock() - clk );
printf( "b" );
Ntl_ManNamStop( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
