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 */