namespace System { internal static class DecimalDecCalc { private static uint D32DivMod1E9(uint hi32, ref uint lo32) { ulong num = ((ulong)hi32 << 32) | lo32; lo32 = (uint)(num / 1000000000); return (uint)(num % 1000000000); } internal static uint DecDivMod1E9(ref MutableDecimal value) { return D32DivMod1E9(D32DivMod1E9(D32DivMod1E9(0, ref value.High), ref value.Mid), ref value.Low); } internal static void DecAddInt32(ref MutableDecimal value, uint i) { if (D32AddCarry(ref value.Low, i) && D32AddCarry(ref value.Mid, 1)) D32AddCarry(ref value.High, 1); } private static bool D32AddCarry(ref uint value, uint i) { uint num = value; uint num2 = value = num + i; if (num2 >= num) return num2 < i; return true; } internal static void DecMul10(ref MutableDecimal value) { MutableDecimal d = value; DecShiftLeft(ref value); DecShiftLeft(ref value); DecAdd(ref value, d); DecShiftLeft(ref value); } private static void DecShiftLeft(ref MutableDecimal value) { uint num = (uint)((((int)value.Low & -2147483648) != 0) ? 1 : 0); uint num2 = (uint)((((int)value.Mid & -2147483648) != 0) ? 1 : 0); value.Low <<= 1; value.Mid = ((value.Mid << 1) | num); value.High = ((value.High << 1) | num2); } private static void DecAdd(ref MutableDecimal value, MutableDecimal d) { if (D32AddCarry(ref value.Low, d.Low) && D32AddCarry(ref value.Mid, 1)) D32AddCarry(ref value.High, 1); if (D32AddCarry(ref value.Mid, d.Mid)) D32AddCarry(ref value.High, 1); D32AddCarry(ref value.High, d.High); } } }