|
|
package needle
import ( "crypto/md5" "fmt"
"github.com/chrislusf/seaweedfs/weed/util" "github.com/klauspost/crc32" )
var table = crc32.MakeTable(crc32.Castagnoli)
type CRC uint32
func NewCRC(b []byte) CRC { return CRC(0).Update(b) }
func (c CRC) Update(b []byte) CRC { return CRC(crc32.Update(uint32(c), table, b)) }
func (c CRC) Value() uint32 { return uint32(c>>15|c<<17) + 0xa282ead8 }
func (n *Needle) Etag() string { bits := make([]byte, 4) util.Uint32toBytes(bits, uint32(n.Checksum)) return fmt.Sprintf("%x", bits) }
func (n *Needle) MD5() string {
hash := md5.New()
hash.Write(n.Data)
return fmt.Sprintf("%x", hash.Sum(nil))
}
|