const (
// IEEE is by far and away the most common CRC-32 polynomial.
// Used by ethernet (IEEE 802.3), v.42, fddi, gzip, zip, png, ...
IEEE = 0xedb88320
// Castagnoli's polynomial, used in iSCSI.
// Has better error detection characteristics than IEEE.
// http://dx.doi.org/10.1109/26.231911
Castagnoli = 0x82f63b78
// Koopman's polynomial.
// Also has better error detection characteristics than IEEE.
// http://dx.doi.org/10.1109/DSN.2002.1028931
Koopman = 0xeb31d82e
)
Predefined polynomials.
const Size = 4
The size of a CRC-32 checksum in bytes.
var IEEETable = makeTable(IEEE)
IEEETable is the table for the IEEE polynomial.
func Checksum(data []byte, tab *Table) uint32
Checksum returns the CRC-32 checksum of data using the polynomial represented by the Table.
func ChecksumIEEE(data []byte) uint32
ChecksumIEEE returns the CRC-32 checksum of data using the IEEE polynomial.
func New(tab *Table) hash.Hash32
New creates a new hash.Hash32 computing the CRC-32 checksum using the polynomial represented by the Table.
func NewIEEE() hash.Hash32
NewIEEE creates a new hash.Hash32 computing the CRC-32 checksum using the IEEE polynomial.
func Update(crc uint32, tab *Table, p []byte) uint32
Update returns the result of adding the bytes in p to the crc.
type Table [256]uint32
Table is a 256-word table representing the polynomial for efficient processing.
func MakeTable(poly uint32) *Table
MakeTable returns the Table constructed from the specified polynomial.