private void DoEachPrep(StackFrame frame, uint eachVar)
{
LayeGenerator gen;
var value = frame.Pop();
if (!(value is LayeGenerator))
{
var genObj = value[this, "enumerator", false];
gen = genObj as LayeGenerator;
if (gen == null)
{
RaiseException("Failed to get a generator from type {0} to enumerate. There should be an instance property called \"enumerator\" that returns a generator.", genObj.TypeName);
return;
}
}
else gen = value as LayeGenerator;
// eachVar is the var the user has access to, eachVar + 1 is our temp store, and eachVar + 2 is the generator
frame[eachVar + 1] = gen;
}
private void DoIEachPrep(StackFrame frame, uint eachIndex)
{
LayeGenerator gen;
var value = frame.Pop();
if (!(value is LayeGenerator))
{
var genObj = value[this, "enumerator", false];
gen = genObj as LayeGenerator;
if (gen == null)
{
RaiseException("Failed to get a generator from type {0} to enumerate. There should be an instance property called \"enumerator\" that returns a generator.", genObj.TypeName);
return;
}
}
else gen = value as LayeGenerator;
frame[eachIndex + 1] = ICONST0;
frame[eachIndex + 3] = gen;
}
private void DoRes(StackFrame frame)
{
var value = frame.Pop();
var gen = value as LayeGenerator;
if (gen == null)
{
RaiseException("Expected a generator to resume, got a(n) {0}.", value.TypeName);
return;
}
LayeObject result;
var success = gen.Resume(this, out result);
if (success)
{
if (result == null)
frame.Push(NULL);
else frame.Push(result);
}
}
//[MethodImpl(MethodImplOptions.AggressiveInlining)]
private void DoIterPrep(StackFrame frame, uint iterVar, bool hasStep)
{
// step, limit, init -> iter (iterVar = init to limit by step)
var step = hasStep ? frame.Pop().As(this, LayeInt.TYPE) as LayeInt : null;
var limit = frame.Pop().As(this, LayeInt.TYPE) as LayeInt;
var init = frame.Pop().As(this, LayeInt.TYPE) as LayeInt;
if (!hasStep)
step = init.value < limit.value ? ICONST1 : ICONSTM1;
// Now check what we popped, make sure they're valid
if (init == null)
{
RaiseException("iter initial value must be an Int or convertible to an Int.");
return;
}
if (limit == null)
{
RaiseException("iter limit must be an Int or convertible to an Int.");
return;
}
if (step == null)
{
RaiseException("iter step must be an Int or convertible to an Int.");
return;
}
if (step.value == 0)
{
RaiseException("iter step cannot be zero.");
return;
}
if (init.value < limit.value ? step.value < 0 : step.value > 0)
{
RaiseException("Invalid iter step. The given step will lead the index away from the limit, dooming the loop to never complete.");
return;
}
// Prep the init value
init = LayeInt.ValueOf(init.value - step.value);
// Store each value where it should go:
// We double the first one because + 0 is the visible value, + 1 is the internal value for safety.
// We don't want the user messing with our internal counter, we reset it each iteration.
frame[iterVar] = init;
frame[iterVar + 1] = init;
frame[iterVar + 2] = limit;
frame[iterVar + 3] = step;
}
private void DoMethodInvoke(StackFrame frame, string methodName, uint insn)
{
var args = frame.PopCount((int)Insn.GET_A(insn));
frame.Push(frame.Pop().MethodInvoke(this, methodName, args));
}
private void DoInvoke(StackFrame frame, uint insn)
{
var args = frame.PopCount((int)Insn.GET_C(insn));
frame.Push(frame.Pop().Invoke(this, args));
}
private void DoIStore(StackFrame frame, uint insn)
{
var value = frame.Pop();
var args = frame.PopCount((int)Insn.GET_C(insn));
frame.Pop()[this, args] = value;
frame.Push(value);
}
private void DoILoad(StackFrame frame, uint insn)
{
var args = frame.PopCount((int)Insn.GET_C(insn));
frame.Push(frame.Pop()[this, args]);
}
internal LayeObject Execute(StackFrame frame, LayeClosure closure, LayeObject ths = null, params LayeObject[] args)
{
if (frame == null)
frame = stack.PushFrame(closure, ths, args);
else stack.PushFrame(frame);
reentry:
var kit = closure.kit;
var outers = closure.outers;
var nested = closure.proto.nested;
var strings = closure.proto.strings;
var numericConsts = closure.proto.numericConsts;
var code = closure.proto.code;
var codeLen = (uint)code.Length;
var paramc = closure.proto.numParams;
var argc = args.Length;
var vargs = closure.proto.hasVargs;
var openOuters = frame.openOuters;
uint insn;
OpCode op;
for (; frame.ip < codeLen && !frame.Aborted && !frame.yielded; frame.ip++)
{
op = (OpCode)((insn = code[frame.ip]) & Insn.MAX_OP);
#if DEBUG_STACK
Console.WriteLine(frame.ip + " " + op);
frame.PrintLocals(this);
frame.PrintStack(this);
#endif
switch (op)
{
default: RaiseException(string.Format("Unhandled op code {0}.", op)); return NULL;
case OpCode.NOP: continue;
case OpCode.POP: frame.Pop(); continue;
case OpCode.DUP: frame.Dup(); continue;
case OpCode.CLOSE: CloseOuters(openOuters, Insn.GET_C(insn)); continue;
// These all do n - 1 because frame.ip++ happens anyway. I hate it, but oh well.
case OpCode.JUMP: frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.JUMPEQ: if (frame.SwapPop().Equals(frame.Pop())) frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.JUMPNEQ: if (!frame.SwapPop().Equals(frame.Pop())) frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.JUMPT: if (frame.Pop().ToBool(this)) frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.JUMPF: if (!frame.Pop().ToBool(this)) frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.LLOAD: frame.Push(frame[Insn.GET_C(insn)]); continue;
case OpCode.LSTORE: frame[Insn.GET_C(insn)] = frame.Top; continue;
case OpCode.OLOAD: frame.Push(outers[Insn.GET_C(insn)].Value); continue;
case OpCode.OSTORE: outers[Insn.GET_C(insn)].Set(this, frame.Top); continue;
case OpCode.KLOAD: frame.Push(kit[this, strings[Insn.GET_C(insn)]]); continue;
case OpCode.KSTORE: kit[this, strings[Insn.GET_C(insn)]] = frame.Top; continue;
case OpCode.GLOAD: frame.Push(kit.GetGlobal(this, strings[Insn.GET_C(insn)])); continue;
case OpCode.GSTORE: kit.SetGlobal(this, strings[Insn.GET_C(insn)], frame.Top); continue;
case OpCode.ILOAD: DoILoad(frame, insn); continue;
case OpCode.ISTORE: DoIStore(frame, insn); continue;
case OpCode.OILOAD: frame.Push(frame.Pop().OperatorIndexGet(this, strings[Insn.GET_C(insn)])); continue;
case OpCode.OISTORE: frame.SwapPop().OperatorIndexSet(this, strings[Insn.GET_C(insn)], frame.Top); continue;
case OpCode.FLOAD: frame.Push(frame.Pop()[this, strings[Insn.GET_C(insn)]]); continue;
case OpCode.FSTORE: frame.SwapPop()[this, strings[Insn.GET_C(insn)]] = frame.Top; continue;
case OpCode.LOAD: DoLoad(frame, kit, strings[Insn.GET_C(insn)]); continue;
case OpCode.STORE: DoStore(frame, kit, strings[Insn.GET_C(insn)]); continue;
case OpCode.NULL: frame.Push(NULL); continue;
case OpCode.TRUE: frame.Push(TRUE); continue;
case OpCode.FALSE: frame.Push(FALSE); continue;
case OpCode.ENDL: frame.Push(ENDL); continue;
case OpCode.NCONST: frame.Push(numericConsts[Insn.GET_C(insn)]); continue;
case OpCode.SCONST: frame.Push(Insn.GET_B(insn) == 0 ? new LayeString(strings[Insn.GET_A(insn)]) as LayeObject : LayeSymbol.getUnsafe(strings[Insn.GET_A(insn)])); continue;
case OpCode.ICONSTM1: frame.Push(ICONSTM1); continue;
case OpCode.ICONST0: frame.Push(ICONST0); continue;
case OpCode.ICONST1: frame.Push(ICONST1); continue;
case OpCode.ICONST2: frame.Push(ICONST2); continue;
case OpCode.ICONST3: frame.Push(ICONST3); continue;
case OpCode.ICONST4: frame.Push(ICONST4); continue;
case OpCode.ICONST5: frame.Push(ICONST5); continue;
case OpCode.FCONSTM1: frame.Push(FCONSTM1); continue;
case OpCode.FCONST0: frame.Push(FCONST0); continue;
case OpCode.FCONST1: frame.Push(FCONST1); continue;
case OpCode.FCONST2: frame.Push(FCONST2); continue;
case OpCode.LIST: frame.Push(new LayeList(frame.PopCount((int)Insn.GET_C(insn)))); continue;
case OpCode.TUPLE: frame.Push(new LayeTuple(frame.PopCount((int)Insn.GET_C(insn)))); continue;
case OpCode.CLOSURE: frame.Push(BuildClosure(nested[Insn.GET_A(insn)], openOuters, null, frame.PopCount((int)Insn.GET_B(insn)))); continue;
case OpCode.GENERATOR: frame.Push(new LayeClosureGeneratorSpawner(frame.Pop() as LayeClosure)); continue;
case OpCode.INVOKE: DoInvoke(frame, insn); continue;
case OpCode.MINVOKE: DoMethodInvoke(frame, strings[Insn.GET_B(insn)], insn); continue;
case OpCode.TINVOKE: DoThisInvoke(frame, ths, strings[Insn.GET_B(insn)], insn); continue;
case OpCode.TAILINVOKE:
var saveArgs = frame.PopCount((int)Insn.GET_C(insn));
EndCall(frame, openOuters);
frame.Reset();
frame.SetArgs(saveArgs);
goto reentry;
case OpCode.YIELD: frame.yielded = true; continue;
case OpCode.RES: DoRes(frame); continue;
case OpCode.KIT: frame.Push(kit); continue;
case OpCode.THIS: frame.Push(ths); continue;
case OpCode.SELF: frame.Push(closure); continue;
case OpCode.STATIC: frame.Push(closure.definedType); continue;
case OpCode.PREFIX: frame.Push(frame.Pop().Prefix(this, strings[Insn.GET_C(insn)])); continue;
case OpCode.INFIX: frame.Push(frame.SwapPop().Infix(this, strings[Insn.GET_C(insn)], frame.Pop())); continue;
case OpCode.AS: frame.Push(frame.SwapPop().As(this, frame.Pop())); continue;
case OpCode.NOT: frame.Push(frame.Pop().ToBool(this) ? FALSE : TRUE); continue;
case OpCode.AND: if (frame.Top.ToBool(this)) frame.Pop(); else frame.ip = Insn.GET_C(insn) - 1; continue;
case OpCode.OR: if (frame.Top.ToBool(this)) frame.ip = Insn.GET_C(insn) - 1; else frame.Pop(); continue;
case OpCode.XOR: frame.Push((frame.Pop().ToBool(this) != frame.Pop().ToBool(this)) ? TRUE : FALSE); continue;
case OpCode.COMPIS: frame.Push((LayeBool)ReferenceEquals(frame.Pop(), frame.Pop())); continue;
case OpCode.COMPNOTIS: frame.Push((LayeBool)!ReferenceEquals(frame.Pop(), frame.Pop())); continue;
case OpCode.COMPTYPEOF: frame.Push((LayeBool)frame.SwapPop().TypeOf(this, frame.Pop())); continue;
case OpCode.COMPNOTTYPEOF: frame.Push((LayeBool)!frame.SwapPop().TypeOf(this, frame.Pop())); continue;
case OpCode.TYPEOF: frame.Push(frame.Pop().TypeDef); continue;
case OpCode.THROW: RaiseException(frame.Pop()); continue;
case OpCode.STOREEX: frame[Insn.GET_C(insn)] = lastException; continue;
case OpCode.BEGINEXH: var c = Insn.GET_C(insn); while (frame.stackPointer >= c) frame.Pop(); continue;
case OpCode.PUSHEXH: frame.activeExceptionHandlers++; exceptionHandlers.Push(new ExceptionHandler(stack.FrameCount, Insn.GET_C(insn))); continue;
case OpCode.POPEXH: frame.activeExceptionHandlers--; exceptionHandlers.Pop(); continue;
case OpCode.ITERPREP: DoIterPrep(frame, Insn.GET_A(insn), Insn.GET_B(insn) != 0); continue;
case OpCode.ITERLOOP: DoIterLoop(frame, Insn.GET_A(insn), Insn.GET_B(insn)); continue;
case OpCode.EACHPREP: DoEachPrep(frame, Insn.GET_A(insn)); continue;
case OpCode.EACHLOOP: DoEachLoop(frame, Insn.GET_A(insn), Insn.GET_B(insn)); continue;
case OpCode.IEACHPREP: DoIEachPrep(frame, Insn.GET_A(insn)); continue;
case OpCode.IEACHLOOP: DoIEachLoop(frame, Insn.GET_A(insn), Insn.GET_B(insn)); continue;
} // end switch
} // end for
EndCall(frame, openOuters);
#if DEBUG_STACK
frame.PrintStack(this);
#endif
if (frame.Aborted)
return NULL;
stack.PopFrame();
return frame.HasValue() ? frame.Top : NULL;
}