1 files changed, 38 insertions, 0 deletions
diff --git a/go/directory/file_id.go b/go/directory/file_id.go
new file mode 100644
index 000000000..f5f6d46d6
--- /dev/null
+++ b/go/directory/file_id.go
@@ -0,0 +1,38 @@
+package directory
+
+import (
+	"encoding/hex"
+	"code.google.com/p/weed-fs/go/storage"
+	"code.google.com/p/weed-fs/go/util"
+	"strings"
+)
+
+type FileId struct {
+	VolumeId storage.VolumeId
+	Key      uint64
+	Hashcode uint32
+}
+
+func NewFileId(VolumeId storage.VolumeId, Key uint64, Hashcode uint32) *FileId {
+	return &FileId{VolumeId: VolumeId, Key: Key, Hashcode: Hashcode}
+}
+func ParseFileId(fid string) *FileId {
+	a := strings.Split(fid, ",")
+	if len(a) != 2 {
+		println("Invalid fid", fid, ", split length", len(a))
+		return nil
+	}
+	vid_string, key_hash_string := a[0], a[1]
+	volumeId, _ := storage.NewVolumeId(vid_string)
+	key, hash := storage.ParseKeyHash(key_hash_string)
+	return &FileId{VolumeId: volumeId, Key: key, Hashcode: hash}
+}
+func (n *FileId) String() string {
+	bytes := make([]byte, 12)
+	util.Uint64toBytes(bytes[0:8], n.Key)
+	util.Uint32toBytes(bytes[8:12], n.Hashcode)
+	nonzero_index := 0
+	for ; bytes[nonzero_index] == 0; nonzero_index++ {
+	}
+	return n.VolumeId.String() + "," + hex.EncodeToString(bytes[nonzero_index:])
+}