/*	Copyright (c) 1990 UNIX System Laboratories, Inc.	*/
/*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
/*	  All Rights Reserved  	*/

/*	THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF     	*/
/*	UNIX System Laboratories, Inc.                     	*/
/*	The copyright notice above does not evidence any   	*/
/*	actual or intended publication of such source code.	*/


#ident	"@(#)ucbhead:ndbm.h	1.1.3.1"

/*******************************************************************

		PROPRIETARY NOTICE (Combined)

This source code is unpublished proprietary information
constituting, or derived under license from AT&T's UNIX(r) System V.
In addition, portions of such source code were derived from Berkeley
4.3 BSD under license from the Regents of the University of
California.



		Copyright Notice 

Notice of copyright on this source code product does not indicate 
publication.

	(c) 1986,1987,1988,1989  Sun Microsystems, Inc
	(c) 1983,1984,1985,1986,1987,1988,1989  AT&T.
	          All rights reserved.
********************************************************************/ 

/*
 * Hashed key data base library.
 */

#ifndef _NDBM_H
#define _NDBM_H

#define PBLKSIZ 1024
#define DBLKSIZ 4096

typedef struct {
	int	dbm_dirf;		/* open directory file */
	int	dbm_pagf;		/* open page file */
	int	dbm_flags;		/* flags, see below */
	long	dbm_maxbno;		/* last ``bit'' in dir file */
	long	dbm_bitno;		/* current bit number */
	long	dbm_hmask;		/* hash mask */
	long	dbm_blkptr;		/* current block for dbm_nextkey */
	int	dbm_keyptr;		/* current key for dbm_nextkey */
	long	dbm_blkno;		/* current page to read/write */
	long	dbm_pagbno;		/* current page in pagbuf */
	char	dbm_pagbuf[PBLKSIZ];	/* page file block buffer */
	long	dbm_dirbno;		/* current block in dirbuf */
	char	dbm_dirbuf[DBLKSIZ];	/* directory file block buffer */
} DBM;

#define _DBM_RDONLY	0x1	/* data base open read-only */
#define _DBM_IOERR	0x2	/* data base I/O error */

#define dbm_rdonly(db)	((db)->dbm_flags & _DBM_RDONLY)

#define dbm_error(db)	((db)->dbm_flags & _DBM_IOERR)
	/* use this one at your own risk! */
#define dbm_clearerr(db)	((db)->dbm_flags &= ~_DBM_IOERR)

/* for fstat(2) */
#define dbm_dirfno(db)	((db)->dbm_dirf)
#define dbm_pagfno(db)	((db)->dbm_pagf)

typedef struct {
	char	*dptr;
	int	dsize;
} datum;

/*
 * flags to dbm_store()
 */
#define DBM_INSERT	0
#define DBM_REPLACE	1

DBM	*dbm_open();
void	dbm_close();
datum	dbm_fetch();
datum	dbm_firstkey();
datum	dbm_nextkey();
long	dbm_forder();
int	dbm_delete();
int	dbm_store();


#endif /*! _HDBM_H */
