func (cursor *Cursor) Get(set_key []byte, op uint) (key, val []byte, err error) {
var ckey C.MDB_val
var cval C.MDB_val
if set_key != nil && op == SET {
var cset_key *C.MDB_val
cset_key = &C.MDB_val{mv_size: C.size_t(len(set_key)),
mv_data: unsafe.Pointer(&set_key[0])}
ret := C.mdb_cursor_get(cursor._cursor, cset_key, &cval, C.MDB_cursor_op(op))
if ret != SUCCESS {
err = Errno(ret)
key = nil
val = nil
return
}
key = set_key
val = C.GoBytes(cval.mv_data, C.int(cval.mv_size))
}
ret := C.mdb_cursor_get(cursor._cursor, &ckey, &cval, C.MDB_cursor_op(op))
if ret != SUCCESS {
err = Errno(ret)
key = nil
val = nil
return
}
err = nil
key = C.GoBytes(ckey.mv_data, C.int(ckey.mv_size))
val = C.GoBytes(cval.mv_data, C.int(cval.mv_size))
return
}
// getVal1 retrieves items from the database using key data for reference
// (Set, SetRange, etc).
//
// See mdb_cursor_get.
func (c *Cursor) getVal1(setkey []byte, op uint) error {
ret := C.lmdbgo_mdb_cursor_get1(
c._c,
(*C.char)(unsafe.Pointer(&setkey[0])), C.size_t(len(setkey)),
c.txn.key, c.txn.val,
C.MDB_cursor_op(op),
)
return operrno("mdb_cursor_get", ret)
}
func (cursor *Cursor) Get(set_key []byte, op uint) (key, val []byte, err error) {
var ckey C.MDB_val
var cval C.MDB_val
if set_key != nil && (op == SET || op == SET_KEY || op == SET_RANGE) {
ckey.mv_size = C.size_t(len(set_key))
ckey.mv_data = unsafe.Pointer(&set_key[0])
}
ret := C.mdb_cursor_get(cursor._cursor, &ckey, &cval, C.MDB_cursor_op(op))
if ret != SUCCESS {
err = Errno(ret)
key = nil
val = nil
return
}
err = nil
key = C.GoBytes(ckey.mv_data, C.int(ckey.mv_size))
val = C.GoBytes(cval.mv_data, C.int(cval.mv_size))
return
}
// getVal0 retrieves items from the database without using given key or value
// data for reference (Next, First, Last, etc).
//
// See mdb_cursor_get.
func (c *Cursor) getVal0(op uint) error {
ret := C.mdb_cursor_get(c._c, c.txn.key, c.txn.val, C.MDB_cursor_op(op))
return operrno("mdb_cursor_get", ret)
}
func (cursor *Cursor) GetVal(key, val []byte, op uint) (*Val, *Val, error) {
ckey := Wrap(key)
cval := Wrap(val)
ret := C.mdb_cursor_get(cursor._cursor, (*C.MDB_val)(ckey), (*C.MDB_val)(cval), C.MDB_cursor_op(op))
return ckey, cval, errno(ret)
}
func (cursor *Cursor) GetVal(key []byte, op uint) (Val, Val, error) {
ckey := Wrap(key)
var cval Val
ret := C.mdb_cursor_get(cursor._cursor, (*C.MDB_val)(&ckey), (*C.MDB_val)(&cval), C.MDB_cursor_op(op))
return ckey, cval, errno(ret)
}