void *dbfn_read_with_length(open_db *, const uschar *, int *);
uschar *dbfn_scan(open_db *, BOOL, EXIM_CURSOR **);
int dbfn_write(open_db *, const uschar *, void *, int);
void *dbfn_read_with_length(open_db *, const uschar *, int *);
uschar *dbfn_scan(open_db *, BOOL, EXIM_CURSOR **);
int dbfn_write(open_db *, const uschar *, void *, int);