1/* svn_bdb_compat.h --- Compatibility wrapper for different BDB versions.
2 *
3 * ====================================================================
4 *    Licensed to the Apache Software Foundation (ASF) under one
5 *    or more contributor license agreements.  See the NOTICE file
6 *    distributed with this work for additional information
7 *    regarding copyright ownership.  The ASF licenses this file
8 *    to you under the Apache License, Version 2.0 (the
9 *    "License"); you may not use this file except in compliance
10 *    with the License.  You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 *    Unless required by applicable law or agreed to in writing,
15 *    software distributed under the License is distributed on an
16 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 *    KIND, either express or implied.  See the License for the
18 *    specific language governing permissions and limitations
19 *    under the License.
20 * ====================================================================
21 */
22
23#ifndef SVN_LIBSVN_FS_BDB_COMPAT_H
24#define SVN_LIBSVN_FS_BDB_COMPAT_H
25
26#define SVN_WANT_BDB
27#include "svn_private_config.h"
28
29#ifdef __cplusplus
30extern "C" {
31#endif /* __cplusplus */
32
33
34/* Symbols and constants */
35
36/* BDB 4.1 introduced the DB_AUTO_COMMIT flag. Older versions can just
37   use 0 instead. */
38#ifdef DB_AUTO_COMMIT
39#define SVN_BDB_AUTO_COMMIT (DB_AUTO_COMMIT)
40#else
41#define SVN_BDB_AUTO_COMMIT (0)
42#endif
43
44/* DB_INCOMPLETE is obsolete in BDB 4.1. */
45#ifdef DB_INCOMPLETE
46#define SVN_BDB_HAS_DB_INCOMPLETE 1
47#else
48#define SVN_BDB_HAS_DB_INCOMPLETE 0
49#endif
50
51/* In BDB 4.3, "buffer too small" errors come back with
52   DB_BUFFER_SMALL (instead of ENOMEM, which is now fatal). */
53#ifdef DB_BUFFER_SMALL
54#define SVN_BDB_DB_BUFFER_SMALL DB_BUFFER_SMALL
55#else
56#define SVN_BDB_DB_BUFFER_SMALL ENOMEM
57#endif
58
59/* BDB 4.4 introdiced the DB_REGISTER flag for DBEnv::open that allows
60   for automatic recovery of the databases after a program crash. */
61#ifdef DB_REGISTER
62#define SVN_BDB_AUTO_RECOVER (DB_REGISTER | DB_RECOVER)
63#else
64#define SVN_BDB_AUTO_RECOVER (0)
65#endif
66
67
68/* Explicit BDB version check. */
69#define SVN_BDB_VERSION_AT_LEAST(major,minor) \
70    (DB_VERSION_MAJOR > (major) \
71     || (DB_VERSION_MAJOR == (major) && DB_VERSION_MINOR >= (minor)))
72
73
74/* Parameter lists */
75
76/* In BDB 4.1, DB->open takes a transaction parameter. We'll ignore it
77   when building with 4.0. */
78#if SVN_BDB_VERSION_AT_LEAST(4,1)
79#define SVN_BDB_OPEN_PARAMS(env,txn) (env), (txn)
80#else
81#define SVN_BDB_OPEN_PARAMS(env,txn) (env)
82#endif
83
84/* In BDB 4.3, the error gatherer function grew a new DBENV parameter,
85   and the MSG parameter's type changed. */
86#if SVN_BDB_VERSION_AT_LEAST(4,3)
87/* Prevents most compilers from whining about unused parameters. */
88#define SVN_BDB_ERROR_GATHERER_IGNORE(varname) ((void)(varname))
89#else
90#define bdb_error_gatherer(param1, param2, param3) \
91  bdb_error_gatherer(param2, char *msg)
92#define SVN_BDB_ERROR_GATHERER_IGNORE(varname) ((void)0)
93#endif
94
95/* In BDB 4.3 and later, the file names in DB_ENV->open and DB->open
96   are assumed to be encoded in UTF-8 on Windows. */
97#if defined(WIN32) && SVN_BDB_VERSION_AT_LEAST(4,3)
98#define SVN_BDB_PATH_UTF8 (1)
99#else
100#define SVN_BDB_PATH_UTF8 (0)
101#endif
102
103/* In BDB 4.6, the cursor routines were renamed, and the old names
104   deprecated. */
105#if SVN_BDB_VERSION_AT_LEAST(4,6)
106#define svn_bdb_dbc_close(c)         ((c)->close(c))
107#define svn_bdb_dbc_count(c,r,f)     ((c)->count(c,r,f))
108#define svn_bdb_dbc_del(c,f)         ((c)->del(c,f))
109#define svn_bdb_dbc_dup(c,p,f)       ((c)->dup(c,p,f))
110#define svn_bdb_dbc_get(c,k,d,f)     ((c)->get(c,k,d,f))
111#define svn_bdb_dbc_pget(c,k,p,d,f)  ((c)->pget(c,k,p,d,f))
112#define svn_bdb_dbc_put(c,k,d,f)     ((c)->put(c,k,d,f))
113#else
114#define svn_bdb_dbc_close(c)         ((c)->c_close(c))
115#define svn_bdb_dbc_count(c,r,f)     ((c)->c_count(c,r,f))
116#define svn_bdb_dbc_del(c,f)         ((c)->c_del(c,f))
117#define svn_bdb_dbc_dup(c,p,f)       ((c)->c_dup(c,p,f))
118#define svn_bdb_dbc_get(c,k,d,f)     ((c)->c_get(c,k,d,f))
119#define svn_bdb_dbc_pget(c,k,p,d,f)  ((c)->c_pget(c,k,p,d,f))
120#define svn_bdb_dbc_put(c,k,d,f)     ((c)->c_put(c,k,d,f))
121#endif
122
123/* Before calling db_create, we must check that the version of the BDB
124   libraries we're linking with is the same as the one we compiled
125   against, because the DB->open call is not binary compatible between
126   BDB 4.0 and 4.1. This function returns DB_OLD_VERSION if the
127   compile-time and run-time versions of BDB don't match. */
128int svn_fs_bdb__check_version(void);
129
130
131#ifdef __cplusplus
132}
133#endif /* __cplusplus */
134
135#endif /* SVN_LIBSVN_FS_BDB_COMPAT_H */
136