| public static GetMinMaxLengthObjects ( IntX int1, IntX int2, IntX &smallerInt, IntX &biggerInt ) : void | ||
| int1 | IntX | First big integer. |
| int2 | IntX | Second big integer. |
| smallerInt | IntX | Resulting smaller big integer (by length only). |
| biggerInt | IntX | Resulting bigger big integer (by length only). |
| return | void | |
/// <summary>
/// Performs bitwise XOR for two big integers.
/// </summary>
/// <param name="int1">First big integer.</param>
/// <param name="int2">Second big integer.</param>
/// <returns>Resulting big integer.</returns>
static public IntX ExclusiveOr(IntX int1, IntX int2)
{
// Exceptions
if (ReferenceEquals(int1, null))
{
throw new ArgumentNullException("int1", Strings.CantBeNull);
}
if (ReferenceEquals(int2, null))
{
throw new ArgumentNullException("int2", Strings.CantBeNull);
}
// Process zero values in special way
if (int1._length == 0)
{
return(new IntX(int2));
}
if (int2._length == 0)
{
return(new IntX(int1));
}
// Determine big int with lower length
IntX smallerInt;
IntX biggerInt;
DigitHelper.GetMinMaxLengthObjects(int1, int2, out smallerInt, out biggerInt);
// Create new big int object of needed length
IntX newInt = new IntX(biggerInt._length, int1._negative ^ int2._negative);
// Do actual operation
newInt._length = DigitOpHelper.ExclusiveOr(
biggerInt._digits,
biggerInt._length,
smallerInt._digits,
smallerInt._length,
newInt._digits);
// Normalization may be needed
newInt.TryNormalize();
return(newInt);
}
/// <summary>
/// Adds two big integers.
/// </summary>
/// <param name="int1">First big integer.</param>
/// <param name="int2">Second big integer.</param>
/// <returns>Resulting big integer.</returns>
/// <exception cref="ArgumentException"><paramref name="int1" /> or <paramref name="int2" /> is too big for add operation.</exception>
static public IntX Add(IntX int1, IntX int2)
{
// Process zero values in special way
if (int2._length == 0)
{
return(new IntX(int1));
}
if (int1._length == 0)
{
IntX x = new IntX(int2);
x._negative = int1._negative; // always get sign of the first big integer
return(x);
}
// Determine big int with lower length
IntX smallerInt;
IntX biggerInt;
DigitHelper.GetMinMaxLengthObjects(int1, int2, out smallerInt, out biggerInt);
// Check for add operation possibility
if (biggerInt._length == uint.MaxValue)
{
throw new ArgumentException(Strings.IntegerTooBig);
}
// Create new big int object of needed length
IntX newInt = new IntX(biggerInt._length + 1, int1._negative);
// Do actual addition
newInt._length = DigitOpHelper.Add(
biggerInt._digits,
biggerInt._length,
smallerInt._digits,
smallerInt._length,
newInt._digits);
// Normalization may be needed
newInt.TryNormalize();
return(newInt);
}
