/**
        * Copy constructor.  We are using copy constructors in place
        * of the object.Clone() interface as this interface is not
        * supported by J2ME.
        */
        internal LongDigest(
            LongDigest t)
        {
            xBuf = new byte[t.xBuf.Length];

            CopyIn(t);
        }
        protected void CopyIn(LongDigest t)
        {
            Array.Copy(t.xBuf, 0, xBuf, 0, t.xBuf.Length);

            xBufOff = t.xBufOff;
            byteCount1 = t.byteCount1;
            byteCount2 = t.byteCount2;

            H1 = t.H1;
            H2 = t.H2;
            H3 = t.H3;
            H4 = t.H4;
            H5 = t.H5;
            H6 = t.H6;
            H7 = t.H7;
            H8 = t.H8;

            Array.Copy(t.W, 0, W, 0, t.W.Length);
            wOff = t.wOff;
        }