func OpenBDB(env Environment, txn Transaction, file string, database *string, dbtype DbType, flags DbFlag, mode int) (*BerkeleyDB, error) {
cFile := C.CString(file)
defer C.free(unsafe.Pointer(cFile))
var cDatabase *C.char
if database != nil {
cDatabase = C.CString(*database)
defer C.free(unsafe.Pointer(cDatabase))
}
var db *BerkeleyDB = new(BerkeleyDB)
//The flags parameter is currently unused, and must be set to 0.
// https://docs.oracle.com/cd/E17276_01/html/api_reference/C/dbcreate.html
err := Err(C.db_create(&db.ptr, env.ptr, 0))
if err != nil {
return nil, err
}
err = Err(C.db_open(db.ptr, txn.ptr, cFile, cDatabase, C.DBTYPE(dbtype), C.u_int32_t(flags), C.int(mode)))
if err != nil {
db.Close(0)
return nil, err
}
return db, ok
}
// Open a database in the given file and environment.
func OpenDatabase(env Environment, txn Transaction, file string, config *DatabaseConfig) (db Database, err error) {
err = check(C.db_create(&db.ptr, env.ptr, 0))
if err == nil {
defer func() {
if err != nil && db.ptr != nil {
C.db_close(db.ptr, 0)
db.ptr = nil
}
}()
} else {
return
}
var mode C.int = 0
var flags C.u_int32_t = C.DB_THREAD
var cfile, cpassword, cname *C.char
var dbtype C.DBTYPE = C.DB_UNKNOWN
if len(file) > 0 {
cfile = C.CString(file)
defer C.free(unsafe.Pointer(cfile))
}
if config != nil {
if config.Create {
flags |= C.DB_CREATE
}
if config.Mode != 0 {
mode = C.int(config.Mode)
}
if len(config.Password) > 0 {
cpassword := C.CString(config.Password)
defer C.free(unsafe.Pointer(cpassword))
}
if len(config.Name) > 0 {
cname = C.CString(config.Name)
defer C.free(unsafe.Pointer(cname))
}
if config.Type != 0 {
dbtype = C.DBTYPE(config.Type)
}
if config.ReadUncommitted {
flags |= C.DB_READ_UNCOMMITTED
}
if config.Snapshot {
flags |= C.DB_MULTIVERSION
}
}
if cpassword != nil {
err = check(C.db_set_encrypt(db.ptr, cpassword, 0))
if err != nil {
return
}
}
err = check(C.db_open(db.ptr, txn.ptr, cfile, cname, dbtype, flags, mode))
return
}