crc-32 mpeg-2 implementation in golang

crc-32-mpeg-2.go

package main

// based on https://stackoverflow.com/questions/54339800/how-to-modify-crc-32-to-crc-32-mpeg-2

import (
        "fmt"
)

// crc32mpeg2 : calculate crc-32-mpeg-2 checksum
func crc32mpeg2(b []byte) uint32 {
	var crc uint32 = 0xFFFFFFFF
	for _, v := range b {
		// xor next byte to upper bits of crc
		crc ^= uint32(v) << uint32(24)
		for j := 0; j < 8; j++ {
			m := crc >> 31
			crc <<= 1
			crc ^= (0 - m) & 0x04c11db7
		}
	}
	return crc
}

func main() {
        s := "abc123"
        h := crc32b([]byte(s))
        fmt.Printf("%s -> %08x\n", s, h)
}