public GSharpObject InvokeMethod(GSharpMethod method, StackFrame frame, GSharpObject self, GSharpObject[] arguments)
{
Stack.NewFrame(frame);
int insCount = method.Body.Count;
int i = 0;
foreach (string param in method.Parameters.Keys)
{
Stack.StoreLocal(method.Parameters[param], arguments[i++]);
}
StackFrame top = Stack.Top;
while (top.InstructionPointer < insCount && !top.AbortExecution)
{
Instruction currInstr = method.Body[Stack.InstructionPointer++];
ExecuteInstruction(currInstr);
}
if (top.AbortExecution)
{
return(null);
}
GSharpObject retVal = Stack.Pop();
Stack.EndFrame();
return(retVal);
}
public GSharpObject contains(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
if (arguments.Length != 1)
{
throw new System.Exception("Invalid number of arguments to String.contains()");
}
return(new GSharpBool(Value.Contains(arguments[0].ToString())));
}
public StackFrame(int localCount, GSharpMethod method, GSharpObject self)
{
LocalCount = localCount;
Method = method;
Module = method.Module;
Self = self;
locals = new GSharpObject[localCount];
}
private GSharpObject add(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
GSharpList list = self as GSharpList;
foreach (GSharpObject obj in arguments)
{
list.Add(obj);
}
return(null);
}
public GSharpObject isLetters(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
foreach (char ch in Value)
{
if (!char.IsLetter(ch))
{
return(GSharpBool.False);
}
}
return(GSharpBool.True);
}
public GSharpObject isWhitespace(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
foreach (char ch in Value)
{
if (!char.IsWhiteSpace(ch))
{
return(GSharpBool.False);
}
}
return(GSharpBool.True);
}
public virtual GSharpObject PerformBinaryOperation(VirtualMachine vm, BinaryOperation binop, GSharpObject rval)
{
GSharpObject[] arguments = new GSharpObject[] { rval };
switch (binop)
{
case BinaryOperation.Addition:
return(GetAttribute("_add").Invoke(vm, arguments));
case BinaryOperation.Subtraction:
return(GetAttribute("_sub").Invoke(vm, arguments));
case BinaryOperation.Multiplication:
return(GetAttribute("_mul").Invoke(vm, arguments));
case BinaryOperation.Division:
return(GetAttribute("_div").Invoke(vm, arguments));
case BinaryOperation.BooleanAnd:
return(GetAttribute("_boolAnd").Invoke(vm, arguments));
case BinaryOperation.BooleanOr:
return(GetAttribute("_boolOr").Invoke(vm, arguments));
case BinaryOperation.Modulus:
return(GetAttribute("_mod").Invoke(vm, arguments));
case BinaryOperation.Equals:
return(GetAttribute("_equals").Invoke(vm, arguments));
case BinaryOperation.NotEqualTo:
return(GetAttribute("_notEquals").Invoke(vm, arguments));
case BinaryOperation.LessThan:
return(GetAttribute("_lessThan").Invoke(vm, arguments));
case BinaryOperation.GreaterThan:
return(GetAttribute("_greaterThan").Invoke(vm, arguments));
case BinaryOperation.LesserOrEqual:
return(GetAttribute("_lessOrEqual").Invoke(vm, arguments));
case BinaryOperation.GreaterOrEqual:
return(GetAttribute("_greaterOrEqual").Invoke(vm, arguments));
default:
return(null);
}
}
public void SetAttribute(string name, GSharpObject value)
{
if (value is GSharpMethod)
{
if (((GSharpMethod)value).IsInstanceMethod)
{
attributes[name] = new InstanceMethodCallback((GSharpMethod)value, this);
return;
}
else if (value is InstanceMethodCallback)
{
attributes[name] = new InstanceMethodCallback(((InstanceMethodCallback)value).Method, this);
return;
}
}
attributes[name] = value;
}
public void Push(GSharpObject obj)
{
stack.Push(obj);
}
public void StoreLocal(int index, GSharpObject obj)
{
locals[index] = obj;
}
public GSharpObject size(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
return(new GSharpInteger(Value.Length));
}
public override GSharpObject PerformBinaryOperation(VirtualMachine vm, BinaryOperation binop, GSharpObject rval)
{
GSharpString strVal = rval as GSharpString;
if (strVal == null)
{
strVal = (GSharpString)rval.GetAttribute("toString").Invoke(vm, new GSharpObject[] { });
}
switch (binop)
{
case BinaryOperation.Equals:
return(new GSharpBool(strVal.Value == Value));
case BinaryOperation.NotEqualTo:
return(new GSharpBool(strVal.Value != Value));
case BinaryOperation.Addition:
return(new GSharpString(Value + strVal.Value));
}
return(null);
}
public override GSharpObject PerformBinaryOperation(VirtualMachine vm, BinaryOperation binop, GSharpObject rval)
{
GSharpBool boolVal = rval as GSharpBool;
switch (binop)
{
case BinaryOperation.Equals:
return(new GSharpBool(boolVal.Value == Value));
case BinaryOperation.NotEqualTo:
return(new GSharpBool(boolVal.Value != Value));
case BinaryOperation.BooleanAnd:
return(new GSharpBool(boolVal.Value && Value));
case BinaryOperation.BooleanOr:
return(new GSharpBool(boolVal.Value || Value));
}
return(null);
}
public override GSharpObject GetIndex(VirtualMachine vm, GSharpObject key)
{
GSharpInteger index = key as GSharpInteger;
return(Objects[index.Value]);
}
public virtual void SetIndex(VirtualMachine vm, GSharpObject key, GSharpObject value)
{
}
public override GSharpObject PerformBinaryOperation(VirtualMachine vm, BinaryOperation binop, GSharpObject rval)
{
GSharpInteger intVal = rval as GSharpInteger;
if (intVal == null)
{
throw new System.Exception("Right value must be an integer.");
}
switch (binop)
{
case BinaryOperation.Addition:
return(new GSharpInteger(Value + intVal.Value));
case BinaryOperation.Subtraction:
return(new GSharpInteger(Value - intVal.Value));
case BinaryOperation.Multiplication:
return(new GSharpInteger(Value * intVal.Value));
case BinaryOperation.Division:
return(new GSharpInteger(Value / intVal.Value));
case BinaryOperation.Modulus:
return(new GSharpInteger(Value % intVal.Value));
case BinaryOperation.Equals:
return(new GSharpBool(Value == intVal.Value));
case BinaryOperation.NotEqualTo:
return(new GSharpBool(Value != intVal.Value));
case BinaryOperation.GreaterThan:
return(new GSharpBool(Value > intVal.Value));
case BinaryOperation.GreaterOrEqual:
return(new GSharpBool(Value >= intVal.Value));
case BinaryOperation.LessThan:
return(new GSharpBool(Value < intVal.Value));
case BinaryOperation.LesserOrEqual:
return(new GSharpBool(Value <= intVal.Value));
}
return(null);
}
public void StoreLocal(int index, GSharpObject obj)
{
top.StoreLocal(index, obj);
}
private void ExecuteInstruction(Instruction ins)
{
switch (ins.OperationCode)
{
case OperationCode.Pop:
Stack.Pop();
break;
case OperationCode.LoadTrue:
Stack.Push(GSharpBool.True);
break;
case OperationCode.LoadFalse:
Stack.Push(GSharpBool.False);
break;
case OperationCode.StoreLocal:
Stack.StoreLocal(ins.Argument, Stack.Pop());
break;
case OperationCode.LoadLocal:
Stack.Push(Stack.LoadLocal(ins.Argument));
break;
case OperationCode.StoreGlobal:
{
string name = ((GSharpName)Stack.CurrentModule.ConstantPool[ins.Argument]).Value;
if (Stack.CurrentModule.HasAttribute(name))
{
Stack.CurrentModule.SetAttribute(name, Stack.Pop());
}
else
{
globalDictionary[name] = Stack.Pop();
}
break;
}
case OperationCode.LoadGlobal:
{
string name = ((GSharpName)Stack.CurrentModule.ConstantPool[ins.Argument]).Value;
if (globalDictionary.ContainsKey(name))
{
Stack.Push(globalDictionary[name]);
}
else
{
Stack.Push(Stack.CurrentModule.GetAttribute(name));
}
break;
}
case OperationCode.StoreAttribute:
{
GSharpObject target = Stack.Pop();
GSharpObject value = Stack.Pop();
string attribute = ((GSharpName)Stack.CurrentModule.ConstantPool[ins.Argument]).Value;
target.SetAttribute(attribute, value);
break;
}
case OperationCode.LoadAttribute:
{
GSharpObject target = Stack.Pop();
string attribute = ((GSharpName)Stack.CurrentModule.ConstantPool[ins.Argument]).Value;
if (target.HasAttribute(attribute))
{
Stack.Push(target.GetAttribute(attribute));
}
else
{
throw new System.Exception("Could not find attribute " + attribute + ".");
}
break;
}
case OperationCode.LoadConst:
Stack.Push(Stack.CurrentModule.ConstantPool[ins.Argument]);
break;
case OperationCode.LoadNull:
Stack.Push(null);
break;
case OperationCode.LoadIndex:
{
GSharpObject index = Stack.Pop();
GSharpObject target = Stack.Pop();
Stack.Push(target.GetIndex(this, index));
break;
}
case OperationCode.StoreIndex:
{
GSharpObject index = Stack.Pop();
GSharpObject target = Stack.Pop();
GSharpObject value = Stack.Pop();
target.SetIndex(this, index, value);
break;
}
case OperationCode.LoadThis:
Stack.Push(Stack.Self);
break;
case OperationCode.BinaryOperation:
Stack.Push(Stack.Pop().PerformBinaryOperation(this, (BinaryOperation)ins.Argument, Stack.Pop()));
break;
case OperationCode.InstanceOf:
{
GSharpObject o1 = Stack.Pop();
GSharpObject o2 = Stack.Pop();
Stack.Push(new GSharpBool(o1.Type == o2.Type));
break;
}
case OperationCode.Invoke:
{
GSharpObject target = Stack.Pop();
GSharpObject[] arguments = new GSharpObject[ins.Argument];
for (int i = 1; i <= ins.Argument; i++)
{
arguments[ins.Argument - i] = Stack.Pop();
}
Stack.Push(target.Invoke(this, arguments));
break;
}
case OperationCode.Return:
Stack.InstructionPointer = int.MaxValue;
break;
case OperationCode.JumpIfTrue:
if (Stack.Pop().IsTrue())
{
Stack.InstructionPointer = ins.Argument;
}
break;
case OperationCode.JumpIfFalse:
if (!Stack.Pop().IsTrue())
{
Stack.InstructionPointer = ins.Argument;
}
break;
case OperationCode.Jump:
Stack.InstructionPointer = ins.Argument;
break;
}
}
private GSharpObject size(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
return(new GSharpInteger(((GSharpList)self).Objects.Count));
}
public void Add(GSharpObject obj)
{
Objects.Add(obj);
}
public override void SetIndex(VirtualMachine vm, GSharpObject key, GSharpObject value)
{
GSharpInteger index = key as GSharpInteger;
Objects[index.Value] = value;
}
public InstanceMethodCallback(GSharpMethod method, GSharpObject self) : base("Instance Method Callback")
{
Method = method;
this.self = self;
}
public virtual GSharpObject GetIndex(VirtualMachine vm, GSharpObject key)
{
return(null);
}
public override GSharpObject GetIndex(VirtualMachine vm, GSharpObject key)
{
GSharpInteger index = key as GSharpInteger;
return(new GSharpString(Value[index.Value].ToString()));
}
public void NewFrame(int localCount, GSharpMethod method, GSharpObject self)
{
Frames++;
top = new StackFrame(localCount, method, self);
frames.Push(top);
}
private GSharpObject toChar(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
return(new GSharpString(((char)Value).ToString()));
}
public int DefineConstant(GSharpObject obj)
{
constantPool.Add(obj);
return(constantPool.Count - 1);
}
public GSharpObject toString(VirtualMachine vm, GSharpObject self, GSharpObject[] arguments)
{
return(new GSharpString(Value.ToString()));
}
public void Push(GSharpObject obj)
{
top.Push(obj);
}
