1 files changed, 23 insertions, 0 deletions
diff --git a/pkg/btrfs/io_ref.go b/pkg/btrfs/io_ref.go
new file mode 100644
index 0000000..aa37fee
--- /dev/null
+++ b/pkg/btrfs/io_ref.go
@@ -0,0 +1,23 @@
+package btrfs
+
+import (
+	"lukeshu.com/btrfs-tools/pkg/binstruct"
+)
+
+type Ref[T any] struct {
+	dev  *Device
+	addr int64
+	Data T
+}
+
+func (r *Ref[T]) Read() error {
+	size, err := binstruct.Size(r.Data)
+	if err != nil {
+		return err
+	}
+	buf := make([]byte, size)
+	if _, err := r.dev.ReadAt(buf, r.addr); err != nil {
+		return err
+	}
+	return binstruct.Unmarshal(buf, &r.Data)
+}