private void InterpretToken(BefungeToken token)
{
switch (token.TokenType)
{
case BefungeTokenType.Int:
_intStack.Push((token as BefungeIntToken).Value);
break;
case BefungeTokenType.Char:
var tkn = (BefungeIntToken)token;
if (_charMode)
{
_intStack.Push(tkn.Value);
}
break;
#region ariphmetic
case BefungeTokenType.Add:
PerformAddition();
break;
case BefungeTokenType.Divide:
PerformDivision();
break;
case BefungeTokenType.Subtract:
PerformSubtraction();
break;
case BefungeTokenType.Multiply:
PerformMultiplication();
break;
case BefungeTokenType.Modulo:
PerformModulo();
break;
#endregion
#region directions
case BefungeTokenType.MoveUp:
_direction = Direction.Up;
break;
case BefungeTokenType.MoveDown:
_direction = Direction.Down;
break;
case BefungeTokenType.MoveLeft:
_direction = Direction.Left;
break;
case BefungeTokenType.MoveRight:
_direction = Direction.Right;
break;
#endregion
case BefungeTokenType.MoveRightConditional:
if (_intStack.Count == 0)
{
_direction = Direction.Right;
return;
}
_direction = _intStack.Pop() == 0 ? Direction.Right : Direction.Left;
break;
case BefungeTokenType.MoveDownConditional:
if (_intStack.Count == 0)
{
_direction = Direction.Down;
return;
}
_direction = _intStack.Pop() == 0 ? Direction.Down : Direction.Up;
break;
case BefungeTokenType.Quotes:
_charMode = !_charMode;
break;
case BefungeTokenType.NOP:
return;
case BefungeTokenType.MoveRandom:
var random = new Random().Next(100);
if (random < 25)
{
_direction = Direction.Right;
}
else if (random > 25 && random < 50)
{
_direction = Direction.Left;
}
else if (random > 50 && random < 75)
{
_direction = Direction.Up;
}
else if (random > 75)
{
_direction = Direction.Down;
}
break;
case BefungeTokenType.Not:
var p = _intStack.Pop() == 0 ? 1 : 0;
_intStack.Push(p);
break;
case BefungeTokenType.CopyTop:
if (_intStack.Count == 0)
{
return;
}
var copy = _intStack.Peek();
_intStack.Push(copy);
break;
case BefungeTokenType.GreaterThan:
var a = _intStack.Pop();
var b = _intStack.Pop();
if (b > a)
{
_intStack.Push(0);
}
else
{
_intStack.Push(1);
}
break;
case BefungeTokenType.SwapTop:
var top = _intStack.Pop();
var subTop = _intStack.Pop();
_intStack.Push(top);
_intStack.Push(subTop);
break;
case BefungeTokenType.Pop:
_intStack.Pop();
break;
case BefungeTokenType.PrintTopInt:
var i = _intStack.Pop();
output += i.ToString();
break;
case BefungeTokenType.PrintTopSymbol:
var sym = _intStack.Pop();
output += ((char)sym).ToString();
break;
case BefungeTokenType.Trampoline:
_pointer.Move(_direction);
break;
case BefungeTokenType.Get:
var x = _intStack.Pop();
var y = _intStack.Pop();
try
{
var result = _table.GetTokenAt(x, y);
var asInt = result as BefungeIntToken;
_intStack.Push(asInt.Value);
}
catch (IndexOutOfRangeException)
{
_intStack.Push(0);
}
break;
case BefungeTokenType.Put:
var x1 = _intStack.Pop();
var y1 = _intStack.Pop();
var v = _intStack.Pop();
_table.SetTokenValueAt(x1, y1, v);
break;
case BefungeTokenType.GetInt:
case BefungeTokenType.GetSymbol:
int i1 = int.Parse(Console.ReadLine());
_intStack.Push(i1);
break;
case BefungeTokenType.EOF:
return;
}
}
public BefungeToken GetToken()
{
return(_table.GetTokenAt(_xpos, _ypos));
}
