package com.hurlant.math

{

	use namespace bi_internal;

	/**

	 * Modular reduction using "classic" algorithm

	 */

	internal class ClassicReduction implements IReduction

	{

		private var m:BigInteger;

		public function ClassicReduction(m:BigInteger) {

			this.m = m;

		}

		public function convert(x:BigInteger):BigInteger {

			if (x.s<0 || x.compareTo(m)>=0) {

				return x.mod(m);

			}

			return x;

		}

		public function revert(x:BigInteger):BigInteger {

			return x;

		}

		public function reduce(x:BigInteger):void {

			x.divRemTo(m, null,x);

		}

		public function mulTo(x:BigInteger, y:BigInteger, r:BigInteger):void {

			x.multiplyTo(y,r);

			reduce(r);

		}

		public function sqrTo(x:BigInteger, r:BigInteger):void {

			x.squareTo(r);

			reduce(r);

		}

	}

}