1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2022 */
6 /* Copyright (c) University of Cambridge 1995 - 2021 */
7 /* See the file NOTICE for conditions of use and distribution. */
12 /* Functions for reading/writing exim database files */
14 void dbfn_close(open_db *);
15 int dbfn_delete(open_db *, const uschar *);
16 open_db *dbfn_open(uschar *, int, open_db *, BOOL, BOOL);
17 void *dbfn_read_with_length(open_db *, const uschar *, int *);
18 void *dbfn_read_enforce_length(open_db *, const uschar *, size_t);
19 uschar *dbfn_scan(open_db *, BOOL, EXIM_CURSOR **);
20 int dbfn_write(open_db *, const uschar *, void *, int);
22 /* Macro for the common call to read without wanting to know the length. */
24 #define dbfn_read(a, b) dbfn_read_with_length(a, b, NULL)
26 /* Berkeley DB uses a callback function to pass back error details. Its API
27 changed at release 4.3. */
29 #if defined(USE_DB) && defined(DB_VERSION_STRING)
30 # if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 3)
31 void dbfn_bdb_error_callback(const DB_ENV *, const char *, const char *);
33 void dbfn_bdb_error_callback(const char *, char *);
38 /* End of dbfunctions.h */