// Read a (length prefixed) byteslice then decode the object using the codec
func decodeByteSlice(codec binary.Codec, r io.Reader, n *int64, err *error) interface{} {
bytez := binary.ReadByteSlice(r, n, err)
if *err != nil {
return nil
}
n_ := new(int64)
return codec.Decode(bytes.NewBuffer(bytez), n_, err)
}
// NOTE: The hash is not saved or set. The caller should set the hash afterwards.
// (Presumably the caller already has the hash)
func ReadIAVLNode(t *IAVLTree, r io.Reader, n *int64, err *error) *IAVLNode {
node := &IAVLNode{}
// node header
node.height = binary.ReadInt8(r, n, err)
node.size = binary.ReadVarint(r, n, err)
node.key = decodeByteSlice(t.keyCodec, r, n, err)
if node.height == 0 {
// value
node.value = decodeByteSlice(t.valueCodec, r, n, err)
} else {
// children
node.leftHash = binary.ReadByteSlice(r, n, err)
node.rightHash = binary.ReadByteSlice(r, n, err)
}
if *err != nil {
panic(*err)
}
return node
}