function adler32() {
    let A = 1;
    let B = 0;

    for (let char of stringBuffer) {
        A = (A + char) % 65521;
        B = (B + A) % 65521;
    }
    const result = (B << 16) + A;

    return result.toString(16).toUpperCase()
}

function adler8() {
    let A = 1;
    let B = 0;

    for (let char of stringBuffer) {
        A = (A + char) % 13;
        B = (B + A) % 13;
    }
    const result = (B << 4) + A;

    return result.toString(16).toUpperCase()
}

const stringBuffer = new Buffer("Wikipedia");

console.log(
    `Adler-32 hash: ${adler32(stringBuffer)}`,
    '\n',
    `Adler-8 hash: ${adler8(stringBuffer)}`
);