gdbm (1.23)
1 /* ndbm.h - The include file for ndbm users. */
2
3 /* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson.
4 Copyright (C) 1990-2022 Free Software Foundation, Inc.
5
6 GDBM is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GDBM is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GDBM. If not, see <http://www.gnu.org/licenses/>.
18
19 You may contact the author by:
20 e-mail: phil@cs.wwu.edu
21 us-mail: Philip A. Nelson
22 Computer Science Department
23 Western Washington University
24 Bellingham, WA 98226
25
26 *************************************************************************/
27
28 #include <gdbm.h>
29
30 /* Parameters to dbm_store for simple insertion or replacement. */
31 #define DBM_INSERT GDBM_INSERT
32 #define DBM_REPLACE GDBM_REPLACE
33
34 /* The file information header. */
35 typedef struct
36 {
37 GDBM_FILE file; /* Actual gdbm file (held in the .pag file */
38 int dirfd; /* Descriptor of the .dir file */
39 datum _dbm_memory; /* Keeps the last returned key */
40 char *_dbm_fetch_val; /* Keeps the dptr of the last fetched datum */
41 gdbm_error _dbm_errno; /* Error code from the last failed call */
42 } DBM;
43
44 /* Used internally by the library */
45 #define __gdbm_error_to_ndbm(dbm) \
46 do \
47 { \
48 if (gdbm_errno && gdbm_errno != GDBM_ITEM_NOT_FOUND) \
49 (dbm)->_dbm_errno = gdbm_errno; \
50 } \
51 while (0)
52
53 /* These are the routines */
54
55 extern DBM *dbm_open (char *file, int flags, int mode);
56 extern void dbm_close (DBM *dbf);
57 extern datum dbm_fetch (DBM *dbf, datum key);
58 extern int dbm_store (DBM *dbf, datum key, datum content, int flags);
59 extern int dbm_delete (DBM *dbf, datum key);
60 extern datum dbm_firstkey (DBM *dbf);
61 extern datum dbm_nextkey (DBM *dbf);
62 extern int dbm_error (DBM *dbf);
63 extern void dbm_clearerr (DBM *dbf);
64 extern int dbm_dirfno (DBM *dbf);
65 extern int dbm_pagfno (DBM *dbf);
66 extern int dbm_rdonly (DBM *dbf);
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