private static void DoAdd(object[] stack, double[] sDbl, int stackTop, Context cx)
{
object rhs = stack[stackTop + 1];
object lhs = stack[stackTop];
double d;
bool leftRightOrder;
if (rhs == UniqueTag.DOUBLE_MARK)
{
d = sDbl[stackTop + 1];
if (lhs == UniqueTag.DOUBLE_MARK)
{
sDbl[stackTop] += d;
return;
}
leftRightOrder = true;
}
else
{
// fallthrough to object + number code
if (lhs == UniqueTag.DOUBLE_MARK)
{
d = sDbl[stackTop];
lhs = rhs;
leftRightOrder = false;
}
else
{
// fallthrough to object + number code
if (lhs is Scriptable || rhs is Scriptable)
{
stack[stackTop] = ScriptRuntime.Add(lhs, rhs, cx);
}
else
{
if (lhs is CharSequence || rhs is CharSequence)
{
CharSequence lstr = ScriptRuntime.ToCharSequence(lhs);
CharSequence rstr = ScriptRuntime.ToCharSequence(rhs);
stack[stackTop] = new ConsString(lstr, rstr);
}
else
{
double lDbl = (lhs is Number) ? System.Convert.ToDouble(((Number)lhs)) : ScriptRuntime.ToNumber(lhs);
double rDbl = (rhs is Number) ? System.Convert.ToDouble(((Number)rhs)) : ScriptRuntime.ToNumber(rhs);
stack[stackTop] = UniqueTag.DOUBLE_MARK;
sDbl[stackTop] = lDbl + rDbl;
}
}
return;
}
}
// handle object(lhs) + number(d) code
if (lhs is Scriptable)
{
rhs = ScriptRuntime.WrapNumber(d);
if (!leftRightOrder)
{
object tmp = lhs;
lhs = rhs;
rhs = tmp;
}
stack[stackTop] = ScriptRuntime.Add(lhs, rhs, cx);
}
else
{
if (lhs is CharSequence)
{
CharSequence lstr = (CharSequence)lhs;
CharSequence rstr = ScriptRuntime.ToCharSequence(d);
if (leftRightOrder)
{
stack[stackTop] = new ConsString(lstr, rstr);
}
else
{
stack[stackTop] = new ConsString(rstr, lstr);
}
}
else
{
double lDbl = (lhs is Number) ? System.Convert.ToDouble(((Number)lhs)) : ScriptRuntime.ToNumber(lhs);
stack[stackTop] = UniqueTag.DOUBLE_MARK;
sDbl[stackTop] = lDbl + d;
}
}
}
public virtual void TestConsStringSerialization()
{
ConsString r1 = new ConsString("foo", "bar");
MemoryStream baos = new MemoryStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.WriteObject(r1);
oos.Flush();
MemoryStream bais = new MemoryStream(baos.ToArray());
ObjectInputStream ois = new ObjectInputStream(bais);
CharSequence r2 = (CharSequence)ois.ReadObject();
NUnit.Framework.Assert.AreEqual("still the same at the other end", r1.ToString(), r2.ToString());
}