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;
}
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)
{
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)
{
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(valueStack.Pop() is Symbol);
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((char)(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)
{
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)
{
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 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();
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)
{
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;
}