getAdler32 function Null safety
Get the Adler-32 checksum for the given array. You can append bytes to an
already computed adler checksum by specifying the previous adler
value.
Implementation
int getAdler32(List<int> array, [int adler = 1]) {
// largest prime smaller than 65536
const base = 65521;
var s1 = adler & 0xffff;
var s2 = adler >> 16;
var len = array.length;
var i = 0;
while (len > 0) {
var n = 3800;
if (n > len) {
n = len;
}
len -= n;
while (--n >= 0) {
s1 = s1 + (array[i++] & 0xff);
s2 = s2 + s1;
}
s1 %= base;
s2 %= base;
}
return (s2 << 16) | s1;
}