1 files changed, 23 insertions, 0 deletions
diff --git a/bnode.go b/bnode.go
new file mode 100644
index 0000000..d272e93
--- /dev/null
+++ b/bnode.go
@@ -0,0 +1,23 @@
+package bolt
+
+import (
+	"unsafe"
+)
+
+// bnode represents a node on a branch page.
+type bnode struct {
+	flags   uint16
+	keySize uint16
+	pgid    pgid
+	data    uintptr // Pointer to the beginning of the data.
+}
+
+// key returns a byte slice that of the key data.
+func (n *bnode) key() []byte {
+	return (*[MaxKeySize]byte)(unsafe.Pointer(&n.data))[:n.keySize]
+}
+
+// bnodeSize returns the number of bytes required to store a key as a branch node.
+func bnodeSize(key []byte) int {
+	return int(unsafe.Offsetof((*bnode)(nil)).data) + len(key)
+}