private void DoDivide(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
NumericDatum result;
if (a == null)
{
if (b == null)
{
result = new NumericDatum(1);
}
else
{
result = new NumericDatum(b.number);
}
}
else if (b == null)
{
result = new NumericDatum(a.number);
}
else
{
result = new NumericDatum(a.number / b.number);
}
stack.Push(result);
}
private void DoSubtract(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
NumericDatum result;
if (a == null)
{
if (b == null)
{
result = new NumericDatum(0);
}
else
{
result = new NumericDatum(-b.number);
}
}
else if (b == null)
{
result = new NumericDatum(a.number);
}
else
{
result = new NumericDatum(a.number - b.number);
}
stack.Push(result);
}
private void DoMaximum(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
NumericDatum result;
if (a == null)
{
if (b == null)
{
result = new NumericDatum(0);
}
else
{
result = new NumericDatum(b.number);
}
}
else if (b == null)
{
result = new NumericDatum(a.number);
}
else
{
result = new NumericDatum(a.number > b.number ? a.number : b.number);
}
stack.Push(result);
}
public override bool Equals(object obj)
{
NumericDatum other = obj as NumericDatum;
if (other == null)
{
return(false);
}
return(number == other.number);
}
private void DoModulo(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
NumericDatum result;
if (a == null)
{
result = new NumericDatum(0);
}
else if (b == null)
{
result = new NumericDatum(a.number);
}
else
{
result = new NumericDatum(a.number % b.number);
}
stack.Push(result);
}
private void DoLessThanOrEquals(Stack <Datum> stack)
{
NumericDatum b = stack.Pop() as NumericDatum;
NumericDatum a = stack.Pop() as NumericDatum;
BooleanDatum result;
if (a == null)
{
result = new BooleanDatum(true);
}
else if (b == null)
{
result = new BooleanDatum(false);
}
else
{
result = new BooleanDatum(a.number <= b.number);
}
stack.Push(result);
}