Question

I want to pack epoch milliseconds into 6 bytes but i have problem. Let me introduce it:

trace(t);
for (var i:int = 6; i > 0; i--) { 
    dataBuffer.writeByte(((t >>> 8*(i-1)) & 255));
    trace(dataBuffer[dataBuffer.length - 1]);
}

Output:

1330454496254
131
254
197
68
131
254

What i’m doing wrong?

Answer 1

I’m just guessing but I think your t variable is getting automatically converted to an int before the bit operation takes effect. This, of course, destroys the value.

I don’t think it’s possible to use Number in bit operations – AS3 only supports those with int-s.

Depending on how you acquire the value in t, you may want to start with 2 int-s and then extrat the bytes from those.