#include <stdlib.h>
#include <stdio.h>

#include "AS3.h"


//Method exposed to ActionScript
//Takes a String and echos it
static AS3_Val invSqrt(void* self, AS3_Val args)
{
	double xx;
	float x;
	//parse the arguments. Expect 1.
	//pass in val to hold the first argument, which
	//should be a string
	AS3_ArrayValue( args, "DoubleType", &xx );

	x = (float)xx;

    float xhalf = 0.5f*x;
    int i = *(int*)&x;
    i = 0x5f3759df - (i>>1);
    x = *(float*)&i;
    x = x*(1.5f - xhalf*x*x);

    return AS3_Number( x );
}

int main()
{
	//define the methods exposed to ActionScript
	//typed as an ActionScript Function instance
	AS3_Val invsqrtMethod = AS3_Function( NULL, invSqrt );
	
	// construct an object that holds references to the functions
	AS3_Val result = AS3_Object( "invSqrt:AS3ValType", invsqrtMethod );
	
	// Release
	AS3_Release( invsqrtMethod );
	
	// notify that we initialized -- THIS DOES NOT RETURN!
	AS3_LibInit( result );

	// should never get here!
	return 0;
}