/*
 * $XConsortium: hash.h /main/4 1996/06/11 17:21:59 cde-hal $
 *
 * Copyright (c) 1993 HAL Computer Systems International, Ltd.
 * All rights reserved.  Unpublished -- rights reserved under
 * the Copyright Laws of the United States.  USE OF A COPYRIGHT
 * NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
 * OR DISCLOSURE.
 * 
 * THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
 * SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.  USE,
 * DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
 * PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
 * INTERNATIONAL, LTD.
 * 
 *                         RESTRICTED RIGHTS LEGEND
 * Use, duplication, or disclosure by the Government is subject
 * to the restrictions as set forth in subparagraph (c)(l)(ii)
 * of the Rights in Technical Data and Computer Software clause
 * at DFARS 252.227-7013.
 *
 *          HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
 *                  1315 Dell Avenue
 *                  Campbell, CA  95008
 * 
 */


#ifndef _hash_h
#define _hash_h 1

//#include <assert.h>
#include "utility/buffer.h"
#include "utility/key.h"

class hash 
{   

public:
   hash();
   virtual ~hash() ;
 
   virtual void init_data_member(unsigned int v_key_set_sz = 0, 
                                unsigned int v_hash_func_sz = 0, 
                                unsigned int v_hash_tbl_sz = 0);

// status inquiry functions
   virtual int keysetsize()    const { return v_key_set_sz; };
   virtual int hashtablesize() const { return v_hash_tbl_sz; };
   virtual int hashfuncsize()  const { return v_hash_func_sz; };

// return the hash value for a key
   virtual int hashTo(const key_type&) = 0;

// load a set of key-oid pairs 
   virtual Boolean load() { return false; };

// compacted disk representation In and Out functions
   virtual int cdr_sizeof();
   virtual io_status cdrOut(buffer&);
   virtual io_status cdrIn(buffer&);

protected:
   unsigned int v_key_set_sz;
   unsigned int v_hash_func_sz;
   unsigned int v_hash_tbl_sz;
};

#endif