internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object tos = valueStack.Pop();
object under_tos = valueStack.Pop();
valueStack.Push(operation(tos, under_tos));
ip += Length;
}
public object Run(params object[] parameters)
{
var envStack = new EnvironmentStack();
envStack.PushNew(); // Global env
envStack.Set(Symbol.fromString("sys:args"), new Variable(CliToVm(parameters)));
int ip = 0;
var valueStack = new ValueStack();
var callStack = new CallStack();
for (var current = Statements[ip]; !(current is EndStatement); current = Statements[ip])
{
//System.Diagnostics.Debug.Print("0x" + ip.ToString("x4") + ": " + current);
current.Execute(ref ip, valueStack, envStack, callStack);
}
if (envStack.Count() == 0) throw new exceptions.RuntimeException("Bad program: Global environment deleted!");
if (envStack.Count() > 1) throw new exceptions.RuntimeException("Bad program: Environment stack not cleaned up");
if (callStack.Count() > 1) throw new exceptions.RuntimeException("Bad program: Call stack not cleaned up");
if (valueStack.Count() == 0) throw new exceptions.RuntimeException("Bad program: Value stack empty after running");
if (valueStack.Count() > 1) throw new exceptions.RuntimeException("Bad program: Value stack not cleaned up");
return valueStack.Pop();
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
if (callStack.GetLastNumberOfParameters() != NumberOfParameters)
throw new exceptions.RuntimeException(Symbol + ": Invalid parameter count");
envStack.PushNew();
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
if (o is Variable) envStack.Set(Symbol, (Variable)o); // Link to variable, e.g. in Closure
else
{
if (envStack.HasVariable(Symbol))
envStack.Get(Symbol).SetValue(o);
else
envStack.Set(Symbol, new Variable(o));
}
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
int provided = callStack.GetLastNumberOfParameters();
if (provided < NumberOfParameters - 1) // -1 as there may be an empty list as rest parameter
throw new exceptions.RuntimeException(Symbol + ": Invalid parameter count");
object restParameter = Nil.GetInstance();
for (int i = 0; i < NumberOfParametersToSkip; ++i) skipStack.Push(valueStack.Pop());
int numberOfValuesForRestParameter = 1 + provided - NumberOfParameters;
for (int i = 0; i < numberOfValuesForRestParameter; ++i) restParameter = new Pair(valueStack.Pop(), restParameter);
valueStack.Push(restParameter);
for (int i = 0; i < NumberOfParametersToSkip; ++i) valueStack.Push(skipStack.Pop());
envStack.PushNew();
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(new IP(Number));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(((Pair)valueStack.Pop()).Second);
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push((char)(int)valueStack.Pop());
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(valueStack.Pop() is Symbol);
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
char c = (char)valueStack.Pop();
int index = (int)valueStack.Pop();
StringObject str = (StringObject)valueStack.Pop();
str.SetCharAt(index, c);
valueStack.Push(c);
ip += Length;
}
internal abstract void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack);
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
envStack.Pop();
ip = callStack.GetLastIp();
callStack.Pop();
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
envStack.Get(Symbol).SetValue(o);
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
valueStack.Push(random.Next(Convert.ToInt32(o)));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(envStack.Get(Symbol).GetValue());
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(Nil.GetInstance());
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
throw new exceptions.RuntimeException("Error in program: Jump into the middle of a statement");
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(Symbol.fromString(((StringObject)valueStack.Pop()).Value));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
if (o is bool && (bool)o == false) ip = Target;
else ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
ip = Target;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
valueStack.Push(o is int || o is double);
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
valueStack.Push(new StringObject((int)valueStack.Pop()));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
int end = (int)valueStack.Pop();
int start = (int)valueStack.Pop();
StringObject str = (StringObject)valueStack.Pop();
valueStack.Push(new StringObject(str.Value.Substring(start, end - start)));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.TopOfStack();
if (o is bool) printer.Print(((bool)o) ? "#t" : "#f");
else printer.Print(string.Format(CultureInfo.InvariantCulture, "{0}", o));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
List<Variable> values = new List<Variable>();
for (int i = 0; i < NumberOfPushedArguments; ++i)
{
Symbol symbol = (Symbol)valueStack.Pop();
values.Add(envStack.Get(symbol));
}
values.Reverse();
valueStack.Push(new Closure((IP)valueStack.Pop(), values));
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
envStack.Pop();
int oldIp = callStack.GetLastIp();
callStack.Pop();
object target = valueStack.GetFromTop(NumberOfPushedArguments);
if (target is IP)
{
callStack.Push(oldIp, NumberOfPushedArguments);
ip = ((IP)target).Value;
return;
}
if (target is Closure)
{
Closure c = (Closure)target;
foreach (var value in c.ClosedOverValues) valueStack.Push(value);
callStack.Push(oldIp, NumberOfPushedArguments + c.ClosedOverValues.Count);
ip = c.Target;
return;
}
throw new exceptions.RuntimeException("Invalid CALL target");
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
envStack.Set(Symbol, new Variable());
ip += Length;
}
internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
throw new exceptions.Error(valueStack.Pop());
}
