Exemplo n.º 1
0
            public NetBigInteger And(
                NetBigInteger value)
            {
                if (m_sign == 0 || value.m_sign == 0)
                {
                    return Zero;
                }

                int[] aMag = m_sign > 0
                    ? m_magnitude
                    : Add(One).m_magnitude;

                int[] bMag = value.m_sign > 0
                    ? value.m_magnitude
                    : value.Add(One).m_magnitude;

                bool resultNeg = m_sign < 0 && value.m_sign < 0;
                int resultLength = System.Math.Max(aMag.Length, bMag.Length);
                int[] resultMag = new int[resultLength];

                int aStart = resultMag.Length - aMag.Length;
                int bStart = resultMag.Length - bMag.Length;

                for (int i = 0; i < resultMag.Length; ++i)
                {
                    int aWord = i >= aStart ? aMag[i - aStart] : 0;
                    int bWord = i >= bStart ? bMag[i - bStart] : 0;

                    if (m_sign < 0)
                    {
                        aWord = ~aWord;
                    }

                    if (value.m_sign < 0)
                    {
                        bWord = ~bWord;
                    }

                    resultMag[i] = aWord & bWord;

                    if (resultNeg)
                    {
                        resultMag[i] = ~resultMag[i];
                    }
                }

                NetBigInteger result = new NetBigInteger(1, resultMag, true);

                if (resultNeg)
                {
                    result = result.Not();
                }

                return result;
            }