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

            public void MulAdd(uint uMul, uint uAdd) {
                AssertValid();
                Debug.Assert(0 != uMul);

                for (int i = 0; i < length; i++) {
                    uint d, uT;
                    d = MulU(digits[i], uMul, out uT);
                    if (0 != uAdd) {
                        uT += AddU(ref d, uAdd);
                    }
                    digits[i] = d;
                    uAdd = uT;
                }
                if (0 != uAdd) {
                    Ensure(length + 1);
                    digits[length++] = uAdd;
                }
                AssertValid();
            }