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42 lines
1.2 KiB
42 lines
1.2 KiB
package storage
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import (
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"code.google.com/p/weed-fs/go/glog"
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"code.google.com/p/weed-fs/go/util"
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"encoding/hex"
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"errors"
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"strings"
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)
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type FileId struct {
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VolumeId VolumeId
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Key uint64
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Hashcode uint32
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}
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func NewFileIdFromNeedle(VolumeId VolumeId, n *Needle) *FileId {
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return &FileId{VolumeId: VolumeId, Key: n.Id, Hashcode: n.Cookie}
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}
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func NewFileId(VolumeId VolumeId, Key uint64, Hashcode uint32) *FileId {
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return &FileId{VolumeId: VolumeId, Key: Key, Hashcode: Hashcode}
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}
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func ParseFileId(fid string) (*FileId, error) {
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a := strings.Split(fid, ",")
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if len(a) != 2 {
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glog.V(1).Infoln("Invalid fid ", fid, ", split length ", len(a))
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return nil, errors.New("Invalid fid " + fid)
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}
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vid_string, key_hash_string := a[0], a[1]
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volumeId, _ := NewVolumeId(vid_string)
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key, hash, e := ParseKeyHash(key_hash_string)
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return &FileId{VolumeId: volumeId, Key: key, Hashcode: hash}, e
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}
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func (n *FileId) String() string {
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bytes := make([]byte, 12)
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util.Uint64toBytes(bytes[0:8], n.Key)
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util.Uint32toBytes(bytes[8:12], n.Hashcode)
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nonzero_index := 0
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for ; bytes[nonzero_index] == 0; nonzero_index++ {
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}
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return n.VolumeId.String() + "," + hex.EncodeToString(bytes[nonzero_index:])
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}
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