package storage import ( "github.com/chrislusf/weed-fs/go/glog" "github.com/chrislusf/weed-fs/go/util" "encoding/hex" "errors" "strings" ) type FileId struct { VolumeId VolumeId Key uint64 Hashcode uint32 } func NewFileIdFromNeedle(VolumeId VolumeId, n *Needle) *FileId { return &FileId{VolumeId: VolumeId, Key: n.Id, Hashcode: n.Cookie} } func NewFileId(VolumeId VolumeId, Key uint64, Hashcode uint32) *FileId { return &FileId{VolumeId: VolumeId, Key: Key, Hashcode: Hashcode} } func ParseFileId(fid string) (*FileId, error) { a := strings.Split(fid, ",") if len(a) != 2 { glog.V(1).Infoln("Invalid fid ", fid, ", split length ", len(a)) return nil, errors.New("Invalid fid " + fid) } vid_string, key_hash_string := a[0], a[1] volumeId, _ := NewVolumeId(vid_string) key, hash, e := ParseKeyHash(key_hash_string) return &FileId{VolumeId: volumeId, Key: key, Hashcode: hash}, e } 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:]) }