func (ndbm *NDBM) store(key, value []byte, mode C.int) (C.int, error) {
C.dbm_clearerr(ndbm.cDbm)
status, err := C.dbm_store(ndbm.cDbm, bytesToDatum(key), bytesToDatum(value), mode)
if status == checkError {
return status, Error{
dbErrNum: int(C.dbm_error(ndbm.cDbm)),
errnoErr: err,
}
}
return status, nil
}
func (ndbm *NDBM) nextKey() ([]byte, error) {
datum, err := C.dbm_nextkey(ndbm.cDbm)
key := datumToBytes(datum)
if key == nil {
dbErrNum := C.dbm_error(ndbm.cDbm)
if dbErrNum == noError {
return nil, errNoMoreKeys
}
return nil, Error{
dbErrNum: int(dbErrNum),
errnoErr: err,
}
}
return key, nil
}
// Delete deletes an entry from the database.
// Returns KeyNotFound if the key can't be found.
func (ndbm *NDBM) Delete(key []byte) error {
C.dbm_clearerr(ndbm.cDbm)
status, err := C.dbm_delete(ndbm.cDbm, bytesToDatum(key))
if status == checkError {
dbErrNum := C.dbm_error(ndbm.cDbm)
if dbErrNum == C.DBM_ITEM_NOT_FOUND {
return KeyNotFound{key}
}
return Error{
dbErrNum: int(dbErrNum),
errnoErr: err,
}
}
if status == notFound {
return KeyNotFound{key}
}
return nil
}
// Fetch retrieves an entry value by key.
// Returns KeyNotFound if the key can't be found.
func (ndbm *NDBM) Fetch(key []byte) ([]byte, error) {
C.dbm_clearerr(ndbm.cDbm)
datum, err := C.dbm_fetch(ndbm.cDbm, bytesToDatum(key))
value := datumToBytes(datum)
if value == nil {
dbErrNum := C.dbm_error(ndbm.cDbm)
if dbErrNum == noError {
return nil, KeyNotFound{key}
}
if dbErrNum == C.DBM_ITEM_NOT_FOUND {
return nil, KeyNotFound{key}
}
return nil, Error{
dbErrNum: int(dbErrNum),
errnoErr: err,
}
}
return value, nil
}