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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/hash/hashInt.h
parent7d7e60f2dc84393cd4c5db22d2eaf7b1fb1a79b2 (diff)
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-/**CFile****************************************************************
-
- FileName [hashInt.h]
-
- SystemName [ABC: Logic synthesis and verification system.]
-
- PackageName [Hash maps.]
-
- Synopsis [Hash maps.]
-
- Author [Aaron P. Hurst]
-
- Affiliation [UC Berkeley]
-
- Date [Ver. 1.0. Started - May 16, 2006.]
-
- Revision [$Id: vecInt.h,v 1.00 2005/06/20 00:00:00 ahurst Exp $]
-
-***********************************************************************/
-
-#ifndef __HASH_INT_H__
-#define __HASH_INT_H__
-
-////////////////////////////////////////////////////////////////////////
-/// INCLUDES ///
-////////////////////////////////////////////////////////////////////////
-
-#include <stdio.h>
-#include "extra.h"
-
-extern int Hash_DefaultHashFunc(int key, int nBins);
-
-////////////////////////////////////////////////////////////////////////
-/// PARAMETERS ///
-////////////////////////////////////////////////////////////////////////
-
-////////////////////////////////////////////////////////////////////////
-/// BASIC TYPES ///
-////////////////////////////////////////////////////////////////////////
-
-typedef struct Hash_Int_t_ Hash_Int_t;
-typedef struct Hash_Int_Entry_t_ Hash_Int_Entry_t;
-
-struct Hash_Int_Entry_t_
-{
- int key;
- int data;
- struct Hash_Int_Entry_t_ * pNext;
-};
-
-struct Hash_Int_t_
-{
- int nSize;
- int nBins;
- int (* fHash)(int key, int nBins);
- Hash_Int_Entry_t ** pArray;
-};
-
-
-
-////////////////////////////////////////////////////////////////////////
-/// MACRO DEFINITIONS ///
-////////////////////////////////////////////////////////////////////////
-
-#define Hash_IntForEachEntry( pHash, pEntry, bin) \
- for(bin=-1, pEntry=NULL; bin < pHash->nBins; (!pEntry)?(pEntry=pHash->pArray[++bin]):(pEntry=pEntry->pNext)) \
- if (pEntry)
-
-////////////////////////////////////////////////////////////////////////
-/// FUNCTION DEFINITIONS ///
-////////////////////////////////////////////////////////////////////////
-
-/**Function*************************************************************
-
- Synopsis [Allocates a hash map with the given number of bins.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline Hash_Int_t * Hash_IntAlloc( int nBins )
-{
- Hash_Int_t * p;
- int i;
- assert(nBins > 0);
- p = ALLOC( Hash_Int_t, 1);
- p->nBins = nBins;
- p->fHash = Hash_DefaultHashFunc;
- p->nSize = 0;
- p->pArray = ALLOC( Hash_Int_Entry_t *, nBins );
- for(i=0; i<nBins; i++)
- p->pArray[i] = NULL;
-
- return p;
-}
-
-/**Function*************************************************************
-
- Synopsis [Returns 1 if a key already exists.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline int Hash_IntExists( Hash_Int_t *p, int key)
-{
- int bin;
- Hash_Int_Entry_t *pEntry, **pLast;
-
- // find the bin where this key would live
- bin = (*(p->fHash))(key, p->nBins);
-
- // search for key
- pLast = &(p->pArray[bin]);
- pEntry = p->pArray[bin];
- while(pEntry) {
- if (pEntry->key == key) {
- return 1;
- }
- pLast = &(pEntry->pNext);
- pEntry = pEntry->pNext;
- }
-
- return 0;
-}
-
-/**Function*************************************************************
-
- Synopsis [Finds or creates an entry with a key and writes value.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline void Hash_IntWriteEntry( Hash_Int_t *p, int key, int data )
-{
- int bin;
- Hash_Int_Entry_t *pEntry, **pLast;
-
- // find the bin where this key would live
- bin = (*(p->fHash))(key, p->nBins);
-
- // search for key
- pLast = &(p->pArray[bin]);
- pEntry = p->pArray[bin];
- while(pEntry) {
- if (pEntry->key == key) {
- pEntry->data = data;
- return;
- }
- pLast = &(pEntry->pNext);
- pEntry = pEntry->pNext;
- }
-
- // this key does not currently exist
- // create a new entry and add to bin
- p->nSize++;
- (*pLast) = pEntry = ALLOC( Hash_Int_Entry_t, 1 );
- pEntry->pNext = NULL;
- pEntry->key = key;
- pEntry->data = data;
-
- return;
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Finds or creates an entry with a key.]
-
- Description [fCreate specifies whether new entries will be created.]
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline int Hash_IntEntry( Hash_Int_t *p, int key, int fCreate )
-{
- int bin;
- Hash_Int_Entry_t *pEntry, **pLast;
-
- // find the bin where this key would live
- bin = (*(p->fHash))(key, p->nBins);
-
- // search for key
- pLast = &(p->pArray[bin]);
- pEntry = p->pArray[bin];
- while(pEntry) {
- if (pEntry->key == key)
- return pEntry->data;
- pLast = &(pEntry->pNext);
- pEntry = pEntry->pNext;
- }
-
- // this key does not currently exist
- if (fCreate) {
- // create a new entry and add to bin
- p->nSize++;
- (*pLast) = pEntry = ALLOC( Hash_Int_Entry_t, 1 );
- pEntry->pNext = NULL;
- pEntry->key = key;
- pEntry->data = 0;
- return pEntry->data;
- }
-
- return 0;
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Finds or creates an entry with a key and returns the pointer to it.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline int* Hash_IntEntryPtr( Hash_Int_t *p, int key )
-{
- int bin;
- Hash_Int_Entry_t *pEntry, **pLast;
-
- // find the bin where this key would live
- bin = (*(p->fHash))(key, p->nBins);
-
- // search for key
- pLast = &(p->pArray[bin]);
- pEntry = p->pArray[bin];
- while(pEntry) {
- if (pEntry->key == key)
- return &(pEntry->data);
- pLast = &(pEntry->pNext);
- pEntry = pEntry->pNext;
- }
-
- // this key does not currently exist
- // create a new entry and add to bin
- p->nSize++;
- (*pLast) = pEntry = ALLOC( Hash_Int_Entry_t, 1 );
- pEntry->pNext = NULL;
- pEntry->key = key;
- pEntry->data = 0;
-
- return &(pEntry->data);
-}
-
-/**Function*************************************************************
-
- Synopsis [Frees the hash.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-static inline void Hash_IntFree( Hash_Int_t *p ) {
- int bin;
- Hash_Int_Entry_t *pEntry;
-
- // free bins
- for(bin = 0; bin < p->nBins; bin++) {
- pEntry = p->pArray[bin];
- while(pEntry) {
- pEntry = pEntry->pNext;
- FREE( pEntry );
- }
- }
-
- // free hash
- FREE( p->pArray );
- FREE( p );
-}
-
-////////////////////////////////////////////////////////////////////////
-/// END OF FILE ///
-////////////////////////////////////////////////////////////////////////
-
-#endif