2013-04-16 15:10:21 +08:00
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package storage
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2011-12-20 17:00:01 +08:00
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import (
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2014-09-25 00:47:09 +08:00
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"github.com/aszxqw/weed-fs/go/glog"
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"github.com/aszxqw/weed-fs/go/util"
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2013-02-27 14:54:22 +08:00
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"encoding/hex"
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2013-08-14 15:31:02 +08:00
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"errors"
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2013-01-17 16:56:56 +08:00
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"strings"
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2011-12-20 17:00:01 +08:00
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)
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type FileId struct {
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2013-04-16 15:10:21 +08:00
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VolumeId VolumeId
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2011-12-20 17:00:01 +08:00
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Key uint64
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Hashcode uint32
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}
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2014-03-24 12:57:10 +08:00
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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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2013-04-16 15:10:21 +08:00
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func NewFileId(VolumeId VolumeId, Key uint64, Hashcode uint32) *FileId {
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2011-12-20 17:00:01 +08:00
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return &FileId{VolumeId: VolumeId, Key: Key, Hashcode: Hashcode}
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}
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2013-08-14 15:31:02 +08:00
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func ParseFileId(fid string) (*FileId, error) {
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2011-12-22 12:04:47 +08:00
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a := strings.Split(fid, ",")
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2011-12-20 17:00:01 +08:00
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if len(a) != 2 {
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2013-08-14 15:31:02 +08:00
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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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2011-12-20 17:00:01 +08:00
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}
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vid_string, key_hash_string := a[0], a[1]
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2013-04-16 15:10:21 +08:00
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volumeId, _ := NewVolumeId(vid_string)
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2013-12-10 05:53:24 +08:00
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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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2011-12-20 17:00:01 +08:00
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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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2011-12-25 13:30:57 +08:00
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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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2011-12-20 17:00:01 +08:00
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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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2012-08-24 14:14:54 +08:00
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return n.VolumeId.String() + "," + hex.EncodeToString(bytes[nonzero_index:])
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2011-12-20 17:00:01 +08:00
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}
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