private static LongInteger CalculationSumAndSubstruct(LongInteger v1, LongInteger v2, int sign)
{
var result = v1.Clone();
var i = v1.Values.Count - 1;
var j = v2.Values.Count - 1;
var hold = 0;
while (i >= 0 && (j >= 0 || hold != 0))
{
var res = result.Values[i] + (((j >= 0) ? v2.Values[j] : 0)) * sign + hold;
hold = (res + Constants.Radix) / Constants.Radix - 1;
result.Values[i] = (res + Constants.Radix) % Constants.Radix;
i--;
j--;
}
if (sign > 0 && hold != 0)
{
result.Values.Insert(0, hold);
}
else
{
result.Normalize();
}
return(result);
}
public void TestDivZero()
{
var a = new LongInteger("12");
var b = new LongInteger("-0");
a.Div(b);
}
/// <summary> Return "0" if (v1 = v2); Return positive result if (v1 > v2); Return negative result if (v2 > v1)</summary>>
/// <param name="v1">compared value 1</param>
/// <param name="v2"> compared value 2</param>
public static int Compare(LongInteger v1, LongInteger v2)
{
if (Equals(v1, v2))
{
return(0);
}
var sign = ((v1.Negative) ? -1 : 1);
if (v1.Negative != v2.Negative)
{
return(sign);
}
if (v1.Values.Count != v2.Values.Count)
{
return(sign * (v1.Values.Count - v2.Values.Count));
}
var i = 0;
while (i < v1.Values.Count && v1.Values[i] == v2.Values[i])
{
i++;
}
return(sign * v1.Values[i].CompareTo(v2.Values[i]));
}
public void TestAryphOperations()
{
var a = new LongInteger("25");
var b = new LongInteger("5");
var c = a * b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual("125", c.ToString());
c = a + b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual("30", c.ToString());
c = a - b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual("20", c.ToString());
c = a / b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual("5", c.ToString());
c = a ^ 2;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("625", c.ToString());
var d = a > b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual(true, d);
d = a < b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual(false, d);
d = a == b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("5", b.ToString());
Assert.AreEqual(false, d);
b = new LongInteger("25");
d = a == b;
Assert.AreEqual("25", a.ToString());
Assert.AreEqual("25", b.ToString());
Assert.AreEqual(true, d);
}
public void Compare_NegativeDifferentLength_FirstLarger()
{
LongIntegerMath.Compare(LongInteger.Parse("225"), LongInteger.Parse("856"));
var result = LongIntegerMath.Compare(LongInteger.Parse("-98895"), LongInteger.Parse("-85595455488432574564857"));
Assert.IsTrue(result > 0);
}
public void SumLongInteger_IncreasesSignificantBit()
{
var result = LongIntegerMath.SumLongInteger(LongInteger.Parse("9"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("10"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("99"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("100"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("1000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("9999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("10000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("99999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("100000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("999999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("1000000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("9999999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("10000000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("99999999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("100000000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("999999999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("1000000000"), result);
result = LongIntegerMath.SumLongInteger(LongInteger.Parse("9999999999999999999999"), LongInteger.Parse("1"));
Assert.AreEqual(LongInteger.Parse("10000000000000000000000"), result);
}
public static LongInteger Module(LongInteger value)
{
var result = value.Clone();
result.Negative = false;
return(result);
}
public static LongInteger OppositeValue(LongInteger value)
{
var result = value.Clone();
result.InverSign();
return(result);
}
public void TestFactorialNegative()
{
var a = new LongInteger("-453453456366656456");
a.Factorial();
Assert.AreEqual("-453453456366656456", a.ToString());
}
public void SumLongInteger_ShouldNotChangeArguments()
{
var v1 = LongInteger.Parse("1");
var v2 = LongInteger.Parse("200000000000000");
var v3 = LongIntegerMath.SumLongInteger(v1, v2);
Assert.AreEqual(v1.ToString(), "1");
Assert.AreEqual(v2.ToString(), "200000000000000");
Assert.AreEqual(v3.ToString(), "200000000000001");
}
public void MultiplicationLongInteger_WhithManyZeros()
{
var result = LongIntegerMath.MultiplicationLongInteger(LongInteger.Parse("786543767867865354"), LongInteger.Parse("100000000000000000"));
Assert.AreEqual(LongInteger.Parse("78654376786786535400000000000000000"), result);
result = LongIntegerMath.MultiplicationLongInteger(LongInteger.Parse("786543767867865354"), LongInteger.Parse("100000000000000086"));
Assert.AreEqual(LongInteger.Parse("78654376786786603042764036636420444"), result);
result = LongIntegerMath.MultiplicationLongInteger(LongInteger.Parse("78654376700000000007865354"), LongInteger.Parse("1000000000000080006"));
Assert.AreEqual(LongInteger.Parse("78654376700006292829927614200000629275512124"), result);
}
public void TestTypeCasting()
{
var a = new LongInteger("123");
long b = a;
Assert.AreEqual(b, 123);
a = new LongInteger("-123");
b = a;
Assert.AreEqual(b, -123);
}
public void TestTypeCastingImplicit()
{
var a = new LongInteger("123");
var b = (long)a;
Assert.AreEqual(b, 123);
a = new LongInteger("-123");
b = a;
Assert.AreEqual(b, -123);
}
public static LongInteger Factorial(LongInteger value)
{
if (value.Negative)
{
throw new ArgumentException("Factorial x! is not defined for negative x");
}
var result = LongInteger.Parse("1");
for (var i = LongInteger.Parse("1"); Compare(i, value) <= 0; i = SumLongInteger(i, LongInteger.Parse("1")))
{
result = MultiplicationLongInteger(result, i);
}
return(result);
}
public static LongInteger MultiplicationLongInteger(LongInteger v1, LongInteger v2)
{
if (v1.Values.Count < v2.Values.Count)
{
MultiplicationLongInteger(v2, v1);
}
if (v1.Equals("0") || v2.Equals("0"))
{
return(LongInteger.Parse("0"));
}
var multResult = LongInteger.Parse("0");
var j = v2.Values.Count - 1;
var n = 0;
while (j >= 0)
{
var result = Module(v1.Clone());
var i = v1.Values.Count - 1;
var hold = 0;
while (i >= 0)
{
var res = v1.Values[i] * v2.Values[j] + hold;
hold = res / Constants.Radix;
result.Values[i] = res % Constants.Radix;
i--;
}
if (hold != 0)
{
result.Values.Insert(0, hold);
}
for (var k = 0; k < n; k++)
{
result.Values.Add(0);
}
multResult = SumLongInteger(multResult, result);
j--;
n++;
}
multResult.Negative = v1.Negative != v2.Negative;
multResult.Normalize();
return(multResult);
}
public static ILongNumber Power(LongInteger value, LongInteger exponent)
{
var result = LongInteger.Parse("1");
if (exponent.Negative)
{
return(DivisionLongInteger(result, Power(value, Module(exponent)) as LongInteger));
}
for (var i = LongInteger.Parse("1");
Compare(i, exponent) <= 0;
i = SumLongInteger(i, LongInteger.Parse("1")))
{
result = MultiplicationLongInteger(result, value);
}
return(result);
}
public void TestPow()
{
var a = new LongInteger("10");
var c = a.Pow(2);
Assert.AreEqual("10", a.ToString());
Assert.AreEqual("100", c.ToString());
a = new LongInteger("11");
c = a.Pow(8);
Assert.AreEqual("11", a.ToString());
Assert.AreEqual("214358881", c.ToString());
a = new LongInteger("-11");
c = a.Pow(2);
Assert.AreEqual("-11", a.ToString());
Assert.AreEqual("121", c.ToString());
a = new LongInteger("-11");
c = a.Pow(3);
Assert.AreEqual("-11", a.ToString());
Assert.AreEqual("-1331", c.ToString());
a = new LongInteger("23");
c = a.Pow(0);
Assert.AreEqual("23", a.ToString());
Assert.AreEqual("1", c.ToString());
a = new LongInteger("23");
c = a.Pow(1);
Assert.AreEqual("23", a.ToString());
Assert.AreEqual("23", c.ToString());
}
public void TestCompare()
{
var a = new LongInteger("120");
var b = new LongInteger("90");
var r = LongInteger.Compare(a, b);
Assert.AreEqual(1, r);
a = new LongInteger("1110");
b = new LongInteger("1120");
r = LongInteger.Compare(a, b);
Assert.AreEqual(-1, r);
a = new LongInteger("1110");
b = new LongInteger("1110");
r = LongInteger.Compare(a, b);
Assert.AreEqual(0, r);
a = new LongInteger("-120");
b = new LongInteger("90");
r = LongInteger.Compare(a, b);
Assert.AreEqual(-1, r);
a = new LongInteger("120");
b = new LongInteger("-290");
r = LongInteger.Compare(a, b);
Assert.AreEqual(1, r);
a = new LongInteger("-320");
b = new LongInteger("-290");
r = LongInteger.Compare(a, b);
Assert.AreEqual(-1, r);
}
public static LongInteger SumLongInteger(LongInteger v1, LongInteger v2)
{
if (v1.Values.Count < v2.Values.Count)
{
return(SumLongInteger(v2, v1));
}
if (v1.Negative == v2.Negative)
{
return(CalculationSumAndSubstruct(v1, v2, 1));
}
if (v1.Negative)
{
return(OppositeValue(SubstructLongInteger(OppositeValue(v1), v2)));
}
return(SubstructLongInteger(v1, OppositeValue(v2)));
}
public void TestFactorial()
{
var a = new LongInteger("9");
var c = a.Factorial();
Assert.AreEqual("9", a.ToString());
Assert.AreEqual("362880", c.ToString());
a = new LongInteger("100");
c = a.Factorial();
Assert.AreEqual("100", a.ToString());
Assert.AreEqual("93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000", c.ToString());
a = new LongInteger("0");
c = a.Factorial();
Assert.AreEqual("0", a.ToString());
Assert.AreEqual("1", c.ToString());
}
public static ILongNumber DivisionIntoSmall(LongInteger v1, int v2)
{
if (v2 >= Constants.Radix)
{
var divider = LongInteger.Parse(Convert.ToString(v2));
return(DivisionLongInteger(v1, divider));
}
if (v2 == 0)
{
return(v1.IsNegative() ? new InfinityLongNumber(true) : new InfinityLongNumber());
}
var result = v1.Clone();
var modulo = 0;
var i = 0;
while (i < v1.Values.Count)
{
var res = modulo * Constants.Radix + v1.Values[i];
result.Values[i] = (res / Math.Abs(v2));
modulo = (res % Math.Abs(v2));
i++;
}
if (v1.Negative || v2 < 0)
{
result.Negative = true;
}
if (v1.Negative && v2 < 0)
{
result.Negative = false;
}
result.Normalize();
return(result);
}
public static ILongNumber DivisionLongInteger(LongInteger v1, LongInteger v2)
{
ILongNumber result = Module(v1);
var modulo = Module(v2);
var resultIsNegative = v1.IsNegative() != v2.IsNegative();
if (v2.Values.Count == 1)
{
result = DivisionIntoSmall(result as LongInteger, v2.Values[0]);
}
else
{
var low = 0;
var up = Constants.Radix;
while ((up - low) > 1)
{
var midRange = (low + up) / 2;
var res = MultiplicationLongInteger(modulo, LongInteger.Parse(Convert.ToString(midRange)));
if (Compare(res, modulo) > 0)
{
// up = up - up/2;
up = midRange;
}
else
{
// low = low + up/2;
low = midRange;
}
}
throw new NotImplementedException();
}
if (resultIsNegative)
{
result.InverSign();
}
return(result);
}
public static LongInteger SubstructLongInteger(LongInteger v1, LongInteger v2)
{
if (Compare(v1, v2) == 0)
{
return(LongInteger.Parse("0"));
}
if (v1.Negative)
{
return(OppositeValue(SumLongInteger(v2, OppositeValue(v1))));
}
if (v2.Negative)
{
return(SumLongInteger(v1, OppositeValue(v2)));
}
if (Compare(v1, v2) < 0)
{
return(OppositeValue(SubstructLongInteger(v2, v1)));
}
return(CalculationSumAndSubstruct(v1, v2, -1));
}
public void Create_Liter()
{
LongInteger.Parse("15fd");
}
public void Create_NegativeIntegerManyZeroes()
{
var number = LongInteger.Parse("-450000000000000000000000000025");
Assert.AreEqual("-450000000000000000000000000025", number.ToString());
}
public void Create_Integer()
{
var number = LongInteger.Parse("450025");
Assert.AreEqual("450025", number.ToString());
}
public void Create_Positive()
{
var number = LongInteger.Parse("1");
Assert.AreEqual("1", number.ToString());
}
public void Create_NegativeStartsWhithManyZero()
{
var number = LongInteger.Parse("-0000000000000005894");
Assert.AreEqual("-5894", number.ToString());
}
public void Create_StartsWhithZero()
{
var number = LongInteger.Parse("005894");
Assert.AreEqual("5894", number.ToString());
}
public void Create_NegativeZero()
{
var number = LongInteger.Parse("-0");
Assert.AreEqual("0", number.ToString());
}