1 files changed, 23 insertions, 0 deletions
diff --git a/weed/filer2/filechunks.go b/weed/filer2/filechunks.go
new file mode 100644
index 000000000..b2f05de3a
--- /dev/null
+++ b/weed/filer2/filechunks.go
@@ -0,0 +1,23 @@
+package filer2
+
+type Chunks []FileChunk
+
+func (chunks Chunks) TotalSize() (size uint64) {
+	for _, c := range chunks {
+		t := uint64(c.Offset + int64(c.Size))
+		if size < t {
+			size = t
+		}
+	}
+	return
+}
+
+func (chunks Chunks) Len() int {
+	return len(chunks)
+}
+func (chunks Chunks) Swap(i, j int) {
+	chunks[i], chunks[j] = chunks[j], chunks[i]
+}
+func (chunks Chunks) Less(i, j int) bool {
+	return chunks[i].Offset < chunks[j].Offset
+}