private long toLong(byte[] bytes)
{
// if bytes less then 6 pad with random
if (bytes.Length < 6)
{
byte[] temp = new byte[6];
Array.Copy(bytes, 0, temp, 0, bytes.Length);
for (int i=bytes.Length; i<temp.Length; ++i)
temp[i] = (byte)FanInt.random();
bytes = temp;
}
// mask bytes into 6 byte long
long x = ((bytes[0] & 0xFFL) << 40) |
((bytes[1] & 0xFFL) << 32) |
((bytes[2] & 0xFFL) << 24) |
((bytes[3] & 0xFFL) << 16) |
((bytes[4] & 0xFFL) << 8) |
((bytes[5] & 0xFFL) << 0);
// if we have more then six bytes mask against primary six bytes
for (int i=6; i<bytes.Length; ++i)
x ^= (bytes[i] & 0xFFL) << (((i - 6) % 6) * 8);
return x;
}