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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 /*
     31  * Portions of this source code were derived from Berkeley 4.3 BSD
     32  * under license from the Regents of the University of California.
     33  */
     34 
     35 /*
     36  * Hashed key data base library.
     37  */
     38 
     39 #ifndef _NDBM_H
     40 #define	_NDBM_H
     41 
     42 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     43 
     44 #include <sys/feature_tests.h>
     45 #include <sys/types.h>
     46 
     47 #ifdef	__cplusplus
     48 extern "C" {
     49 #endif
     50 
     51 /*
     52  * flags to dbm_store()
     53  */
     54 #define	DBM_INSERT	0
     55 #define	DBM_REPLACE	1
     56 
     57 #define	_PBLKSIZ 1024
     58 #define	_DBLKSIZ 4096
     59 
     60 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
     61 #define	PBLKSIZ _PBLKSIZ
     62 #define	DBLKSIZ _DBLKSIZ
     63 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
     64 
     65 typedef struct {
     66 	int	dbm_dirf;		/* open directory file */
     67 	int	dbm_pagf;		/* open page file */
     68 	int	dbm_flags;		/* flags, see below */
     69 	long	dbm_maxbno;		/* last ``bit'' in dir file */
     70 	long	dbm_bitno;		/* current bit number */
     71 	long	dbm_hmask;		/* hash mask */
     72 	long	dbm_blkptr;		/* current block for dbm_nextkey */
     73 	int	dbm_keyptr;		/* current key for dbm_nextkey */
     74 	long	dbm_blkno;		/* current page to read/write */
     75 	long	dbm_pagbno;		/* current page in pagbuf */
     76 	char	dbm_pagbuf[_PBLKSIZ];	/* page file block buffer */
     77 	long	dbm_dirbno;		/* current block in dirbuf */
     78 	char	dbm_dirbuf[_DBLKSIZ];	/* directory file block buffer */
     79 } DBM;
     80 
     81 #if defined(_XPG4_2)
     82 typedef struct {
     83 	void	*dptr;
     84 	size_t	dsize;
     85 } datum;
     86 #else
     87 typedef struct {
     88 	char	*dptr;
     89 	long	dsize;
     90 } datum;
     91 #endif
     92 
     93 #ifdef	__STDC__
     94 DBM	*dbm_open(const char *, int, mode_t);
     95 void	dbm_close(DBM *);
     96 datum	dbm_fetch(DBM *, datum);
     97 datum	dbm_firstkey(DBM *);
     98 datum	dbm_nextkey(DBM *);
     99 int	dbm_delete(DBM *, datum);
    100 int	dbm_store(DBM *, datum, datum, int);
    101 int	dbm_clearerr(DBM *);
    102 int	dbm_error(DBM *);
    103 #else
    104 DBM	*dbm_open();
    105 void	dbm_close();
    106 datum	dbm_fetch();
    107 datum	dbm_firstkey();
    108 datum	dbm_nextkey();
    109 int	dbm_delete();
    110 int	dbm_store();
    111 int	dbm_clearerr();
    112 int	dbm_error();
    113 #endif
    114 
    115 #define	_DBM_RDONLY	0x1	/* data base open read-only */
    116 #define	_DBM_IOERR	0x2	/* data base I/O error */
    117 
    118 #define	dbm_rdonly(__db)	((__db)->dbm_flags & _DBM_RDONLY)
    119 #define	dbm_error(__db)		((__db)->dbm_flags & _DBM_IOERR)
    120 /* use this one at your own risk! */
    121 #define	dbm_clearerr(__db)	((__db)->dbm_flags &= ~_DBM_IOERR)
    122 /* for fstat(2) */
    123 #define	dbm_dirfno(__db)	((__db)->dbm_dirf)
    124 #define	dbm_pagfno(__db)	((__db)->dbm_pagf)
    125 
    126 #ifdef	__cplusplus
    127 }
    128 #endif
    129 
    130 #endif	/* _NDBM_H */
    131