types - javascript float from/to bits

Question

I am trying to perform something that is brain-dead simple in any other language but not javascript: get the bits out of float (and the other way around).

In C/C++ it would be something like

float a = 3.1415;
int b = *((int*)&a);

and vise-versa

int a = 1000;
float b = *((float*)&a);

In C# you can use the BitConverter ...floatBits or something alike in Java... Even in VB6 for Christ's sake you can memcpy a float32 into an int32. How on earth can I translate between and int and a float in javascript?

Answer 1

function DoubleToIEEE(f)
{
    var buf = new ArrayBuffer(8);
    (new Float64Array(buf))[0] = f;
    return [ (new Uint32Array(buf))[0] ,(new Uint32Array(buf))[1] ];
}