System.Xml.Xsl.XPathConvert.BigInteger.MulPow5 C# (CSharp) Method

            public void MulPow5(int c5) {
                AssertValid();
                Debug.Assert(c5 >= 0);

                const uint C5to13 = 1220703125;
                int cu = (c5 + 12) / 13;

                if (0 == length || 0 == c5) {
                    return;
                }

                Ensure(length + cu);

                for ( ; c5 >= 13; c5 -= 13) {
                    MulAdd(C5to13, 0);
                }

                if (c5 > 0) {
                    uint uT;
                    for (uT = 5; --c5 > 0; ) {
                        uT *= 5;
                    }
                    MulAdd(uT, 0);
                }
                AssertValid();
            }