protected static LispNumber Add(LispInteger a, LispInteger b)
{
try
{
var sum = checked(a.Value + b.Value);
return MakeNumber(sum);
}
catch (OverflowException)
{
return new LispBigInteger((BigInteger)a.Value + b.Value);
}
}
public override LispObject Apply(Cons argumentsValues, LispEnvironment env)
{
LispNumber sum = new LispInteger(0);
foreach (var addend in argumentsValues)
{
var num = addend.As<LispNumber>();
sum = sum.Add(num);
}
return sum;
}
protected static LispNumber Multiply(LispInteger a, LispInteger b)
{
try
{
int product = checked(a.Value * b.Value);
return MakeNumber(product);
}
catch (OverflowException)
{
BigInteger product = (BigInteger)a.Value * b.Value;
return MakeNumber(product);
}
}
protected static LispNumber Divide(LispInteger dividend, LispInteger divisor)
{
try
{
checked
{
int remainder;
int quotient = Math.DivRem(dividend.Value, divisor.Value, out remainder);
if (remainder != 0)
{
return Divide((LispDouble)dividend, (LispDouble)divisor);
}
return MakeNumber(quotient);
}
}
catch (OverflowException)
{
return Divide((LispBigInteger)dividend, (LispBigInteger)divisor);
}
}
public override bool NumberEquals(LispInteger number)
{
return Value == number.Value;
}
public abstract LispNumber Multiply(LispInteger factor);
public abstract LispNumber DivideBy(LispInteger divisor);
public abstract LispNumber Add(LispInteger addend);
public override LispNumber Add(LispInteger addend)
{
return new LispBigInteger(addend).Add(this);
}
public LispBigInteger(LispInteger value)
{
this.Value = value.Value;
}
public override bool NumberEquals(LispInteger number)
{
return NumberEquals(number, this);
}
public override LispNumber Multiply(LispInteger factor)
{
return Multiply(this, (LispBigInteger)factor);
}
public override int CompareTo(LispInteger number)
{
return Value.CompareTo(number.Value);
}
public override LispNumber Add(LispInteger addend)
{
return Add(this, addend);
}
protected static bool NumberEquals(LispInteger a, LispBigInteger b)
{
return (BigInteger)a.Value == b.Value;
}
protected static bool NumberEquals(LispInteger a, LispDouble b)
{
return a.Value == b.Value;
}
public override int CompareTo(LispInteger number)
{
return -Compare(number, this);
}
public abstract int CompareTo(LispInteger number);
public override LispNumber DivideBy(LispInteger divisor)
{
return Divide(this, (LispBigInteger)divisor);
}
public abstract LispNumber DivideInto(LispInteger dividend);
public override LispNumber DivideInto(LispInteger dividend)
{
return Divide((LispBigInteger)dividend, this);
}
public abstract bool NumberEquals(LispInteger number);
protected static int Compare(LispInteger a, LispDouble b)
{
return ((double)a.Value).CompareTo(b.Value);
}
protected static int Compare(LispInteger a, LispBigInteger b)
{
return ((BigInteger)a.Value).CompareTo(b.Value);
}
public LispDouble(LispInteger integer)
{
this.Value = integer.Value;
}