public NetBigInteger Add(
NetBigInteger value)
{
if (m_sign == 0)
return value;
if (m_sign != value.m_sign)
{
if (value.m_sign == 0)
return this;
if (value.m_sign < 0)
return Subtract(value.Negate());
return value.Subtract(Negate());
}
return AddToMagnitude(value.m_magnitude);
}
public NetBigInteger Subtract(
NetBigInteger n)
{
if (n.m_sign == 0)
return this;
if (m_sign == 0)
return n.Negate();
if (m_sign != n.m_sign)
return Add(n.Negate());
int compare = CompareNoLeadingZeroes(0, m_magnitude, 0, n.m_magnitude);
if (compare == 0)
return Zero;
NetBigInteger bigun, lilun;
if (compare < 0)
{
bigun = n;
lilun = this;
}
else
{
bigun = this;
lilun = n;
}
return new NetBigInteger(m_sign * compare, doSubBigLil(bigun.m_magnitude, lilun.m_magnitude), true);
}