1 /* gdbm.h - The include file for dbm users. -*- c -*- */
3 /* This file is part of GDBM, the GNU data base manager, by Philip A. Nelson.
4 Copyright (C) 1990, 1991, 1993, 2011 Free Software Foundation, Inc.
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)
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.
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/>.
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
26 *************************************************************************/
28 /* Protection for multiple includes. */
32 /* GDBM C++ support */
33 # if defined(__cplusplus) || defined(c_plusplus)
37 /* Parameters to gdbm_open for READERS, WRITERS, and WRITERS who
38 can create the database. */
39 # define GDBM_READER 0 /* A reader. */
40 # define GDBM_WRITER 1 /* A writer. */
41 # define GDBM_WRCREAT 2 /* A writer. Create the db if needed. */
42 # define GDBM_NEWDB 3 /* A writer. Always create a new db. */
43 # define GDBM_OPENMASK 7 /* Mask for the above. */
45 # define GDBM_FAST 0x010 /* Write fast! => No fsyncs. OBSOLETE. */
46 # define GDBM_SYNC 0x020 /* Sync operations to the disk. */
47 # define GDBM_NOLOCK 0x040 /* Don't do file locking operations. */
48 # define GDBM_NOMMAP 0x080 /* Don't use mmap(). */
49 # define GDBM_CLOEXEC 0x100 /* Close the underlying fd on exec(3) */
51 /* Parameters to gdbm_store for simple insertion or replacement in the
52 case that the key is already in the database. */
53 # define GDBM_INSERT 0 /* Never replace old data with new. */
54 # define GDBM_REPLACE 1 /* Always replace old data with new. */
56 /* Parameters to gdbm_setopt, specifing the type of operation to perform. */
57 # define GDBM_SETCACHESIZE 1 /* Set the cache size. */
58 # define GDBM_FASTMODE 2 /* Toggle fast mode. OBSOLETE. */
59 # define GDBM_SETSYNCMODE 3 /* Turn on or off sync operations. */
60 # define GDBM_SETCENTFREE 4 /* Keep all free blocks in the header. */
61 # define GDBM_SETCOALESCEBLKS 5 /* Attempt to coalesce free blocks. */
62 # define GDBM_SETMAXMAPSIZE 6 /* Set maximum mapped memory size */
63 # define GDBM_SETMMAP 7 /* Toggle mmap mode */
65 /* Compatibility defines: */
66 # define GDBM_CACHESIZE GDBM_SETCACHESIZE
67 # define GDBM_SYNCMODE GDBM_SETSYNCMODE
68 # define GDBM_CENTFREE GDBM_SETCENTFREE
69 # define GDBM_COALESCEBLKS GDBM_SETCOALESCEBLKS
71 # define GDBM_GETFLAGS 8 /* Get gdbm_open flags */
72 # define GDBM_GETMMAP 9 /* Get mmap status */
73 # define GDBM_GETCACHESIZE 10 /* Get current cache side */
74 # define GDBM_GETSYNCMODE 11 /* Get synch mode */
75 # define GDBM_GETCENTFREE 12 /* Get "centfree" status */
76 # define GDBM_GETCOALESCEBLKS 13 /* Get free block coalesce status */
77 # define GDBM_GETMAXMAPSIZE 14 /* Get maximum mapped memory size */
78 # define GDBM_GETDBNAME 15 /* Return database file name */
80 /* The data and key structure. */
87 /* The file information header. This is good enough for most applications. */
88 typedef struct gdbm_file_info *GDBM_FILE;
90 /* External variable, the gdbm build release string. */
91 extern const char *gdbm_version;
93 # define GDBM_VERSION_MAJOR 1
94 # define GDBM_VERSION_MINOR 10
95 # define GDBM_VERSION_PATCH 0
97 extern int const gdbm_version_number[3];
99 /* GDBM external functions. */
101 extern GDBM_FILE gdbm_open (const char *, int, int, int,
102 void (*)(const char *));
103 extern void gdbm_close (GDBM_FILE);
104 extern int gdbm_store (GDBM_FILE, datum, datum, int);
105 extern datum gdbm_fetch (GDBM_FILE, datum);
106 extern int gdbm_delete (GDBM_FILE, datum);
107 extern datum gdbm_firstkey (GDBM_FILE);
108 extern datum gdbm_nextkey (GDBM_FILE, datum);
109 extern int gdbm_reorganize (GDBM_FILE);
110 extern void gdbm_sync (GDBM_FILE);
111 extern int gdbm_exists (GDBM_FILE, datum);
112 extern int gdbm_setopt (GDBM_FILE, int, void *, int);
113 extern int gdbm_fdesc (GDBM_FILE);
114 extern int gdbm_export (GDBM_FILE, const char *, int, int);
115 extern int gdbm_import (GDBM_FILE, const char *, int);
117 # define GDBM_NO_ERROR 0
118 # define GDBM_MALLOC_ERROR 1
119 # define GDBM_BLOCK_SIZE_ERROR 2
120 # define GDBM_FILE_OPEN_ERROR 3
121 # define GDBM_FILE_WRITE_ERROR 4
122 # define GDBM_FILE_SEEK_ERROR 5
123 # define GDBM_FILE_READ_ERROR 6
124 # define GDBM_BAD_MAGIC_NUMBER 7
125 # define GDBM_EMPTY_DATABASE 8
126 # define GDBM_CANT_BE_READER 9
127 # define GDBM_CANT_BE_WRITER 10
128 # define GDBM_READER_CANT_DELETE 11
129 # define GDBM_READER_CANT_STORE 12
130 # define GDBM_READER_CANT_REORGANIZE 13
131 # define GDBM_UNKNOWN_UPDATE 14
132 # define GDBM_ITEM_NOT_FOUND 15
133 # define GDBM_REORGANIZE_FAILED 16
134 # define GDBM_CANNOT_REPLACE 17
135 # define GDBM_ILLEGAL_DATA 18
136 # define GDBM_OPT_ALREADY_SET 19
137 # define GDBM_OPT_ILLEGAL 20
138 # define GDBM_BYTE_SWAPPED 21
139 # define GDBM_BAD_FILE_OFFSET 22
140 # define GDBM_BAD_OPEN_FLAGS 23
141 # define GDBM_FILE_STAT_ERROR 24
142 # define GDBM_FILE_EOF 25
144 # define _GDBM_MIN_ERRNO 0
145 # define _GDBM_MAX_ERRNO GDBM_FILE_EOF
146 typedef int gdbm_error; /* For compatibilities sake. */
147 extern gdbm_error gdbm_errno;
148 extern const char * const gdbm_errlist[];
150 /* extra prototypes */
152 extern const char *gdbm_strerror (gdbm_error);
153 extern int gdbm_version_cmp (int const a[], int const b[]);
155 # if defined(__cplusplus) || defined(c_plusplus)