move versionsOrder struct to xl-storage-utils

cmd/xl-storage-format-utils.go

@@ -20,6 +20,20 @@ import (
 	jsoniter "github.com/json-iterator/go"
 )
 
+type versionsSorter []FileInfo
+
+func (v versionsSorter) Len() int      { return len(v) }
+func (v versionsSorter) Swap(i, j int) { v[i], v[j] = v[j], v[i] }
+func (v versionsSorter) Less(i, j int) bool {
+	if v[i].IsLatest {
+		return true
+	}
+	if v[j].IsLatest {
+		return false
+	}
+	return v[i].ModTime.After(v[j].ModTime)
+}
+
 func getFileInfoVersions(xlMetaBuf []byte, volume, path string) (FileInfoVersions, error) {
 	if isXL2V1Format(xlMetaBuf) {
 		var xlMeta xlMetaV2

cmd/xl-storage-format-v2.go

@@ -525,20 +525,6 @@ func (z xlMetaV2) TotalSize() int64 {
 	return total
 }
 
-type versionsSorter []FileInfo
-
-func (v versionsSorter) Len() int      { return len(v) }
-func (v versionsSorter) Swap(i, j int) { v[i], v[j] = v[j], v[i] }
-func (v versionsSorter) Less(i, j int) bool {
-	if v[i].IsLatest {
-		return true
-	}
-	if v[j].IsLatest {
-		return false
-	}
-	return v[i].ModTime.After(v[j].ModTime)
-}
-
 // ListVersions lists current versions, and current deleted
 // versions returns error for unexpected entries.
 func (z xlMetaV2) ListVersions(volume, path string) (versions []FileInfo, modTime time.Time, err error) {