mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
22 lines
322 B
Go
22 lines
322 B
Go
package storage
|
|
|
|
import (
|
|
"hash/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
|
|
}
|