Org.BouncyCastle.Math.BigInteger.AddToMagnitude C# (CSharp) Method

		private BigInteger AddToMagnitude(
			int[] magToAdd)
		{
			int[] big, small;
			if (this.magnitude.Length < magToAdd.Length)
			{
				big = magToAdd;
				small = this.magnitude;
			}
			else
			{
				big = this.magnitude;
				small = magToAdd;
			}

			// Conservatively avoid over-allocation when no overflow possible
			uint limit = uint.MaxValue;
			if (big.Length == small.Length)
				limit -= (uint) small[0];

			bool possibleOverflow = (uint) big[0] >= limit;

			int[] bigCopy;
			if (possibleOverflow)
			{
				bigCopy = new int[big.Length + 1];
				big.CopyTo(bigCopy, 1);
			}
			else
			{
				bigCopy = (int[]) big.Clone();
			}

			bigCopy = AddMagnitudes(bigCopy, small);

			return new BigInteger(this.sign, bigCopy, possibleOverflow);
		}