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package storage
import (
"encoding/hex"
"errors"
"strings"
"github.com/chrislusf/weed-fs/go/glog"
"github.com/chrislusf/weed-fs/go/util"
)
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:])
}
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