1 files changed, 31 insertions, 0 deletions
diff --git a/service/path/flatten.go b/service/path/flatten.go
new file mode 100644
index 000000000..45f292f3d
--- /dev/null
+++ b/service/path/flatten.go
@@ -0,0 +1,31 @@
+// Copyright (C) 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package path
+
+// Flatten returns the path p flattened into a list of path nodes, starting with
+// the root and ending with p.
+func Flatten(p Path) []Path {
+	l := []Path{}
+	for p != nil {
+		l = append(l, p)
+		p = p.Base()
+	}
+	// l is backwards, reverse.
+	for i, c, m := 0, len(l), len(l)/2; i < m; i++ {
+		j := c - i - 1
+		l[i], l[j] = l[j], l[i]
+	}
+	return l
+}