Predefined polynomials.
const (
// The ISO polynomial, defined in ISO 3309 and used in HDLC.
ISO = 0xD800000000000000
// The ECMA polynomial, defined in ECMA 182.
ECMA = 0xC96C5795D7870F42
)
The size of a CRC-64 checksum in bytes.
const Size = 8
func Checksum(data []byte, tab *Table) uint64
Checksum returns the CRC-64 checksum of data using the polynomial represented by the Table.
func New(tab *Table) hash.Hash64
New creates a new hash.Hash64 computing the CRC-64 checksum using the polynomial represented by the Table. Its Sum method will lay the value out in big-endian byte order.
func Update(crc uint64, tab *Table, p []byte) uint64
Update returns the result of adding the bytes in p to the crc.
Table is a 256-word table representing the polynomial for efficient processing.
type Table [256]uint64
func MakeTable(poly uint64) *Table
MakeTable returns a Table constructed from the specified polynomial. The contents of this Table must not be modified.