rsyncchecksum

Documentation

Index

• Constants
• func Checksum1(buf []byte) uint32
• func Checksum2(seed int32, buf []byte) []byte
• func FileChecksum(fn string) ([]byte, error)
• func SignExtend(b byte) uint32
• func Tag(sum uint32) uint16
• func Tag2(s1, s2 uint16) uint16

Constants

const Size = md4.Size

Functions

func Checksum1

func Checksum1(buf []byte) uint32

func Checksum2

func Checksum2(seed int32, buf []byte) []byte

func FileChecksum

func FileChecksum(fn string) ([]byte, error)

func SignExtend

func SignExtend(b byte) uint32

SignExtend mirrors how C converts from (signed char) to uint32, i.e. using sign extension. get_checksum1 treats the buffer as (signed char*) instead of (unsigned char*), which likely was not a conscious choice, but here we are.

This function is exported for use in the rolling checksum in match.go.

func Tag

func Tag(sum uint32) uint16

func Tag2

func Tag2(s1, s2 uint16) uint16