public bool VisitNode(StopStatement node)
{
// stop;
Write("stop");
return true;
}
public bool VisitNode(StopStatement node)
{
throw new NotImplementedException();
}
public Statement DecompileStatement()
{
StartPositions.Push((UInt16)Position);
var token = CurrentByte;
switch (token)
{
// return [expression];
case (byte)StandardByteCodes.Return:
return DecompileReturn();
// switch (expression)
case (byte)StandardByteCodes.Switch:
return DecompileSwitch();
// case expression :
case (byte)StandardByteCodes.Case:
return DecompileCase();
// if (expression) // while / for / do until
case (byte)StandardByteCodes.JumpIfNot:
return DecompileConditionalJump();
// continue
case (byte)StandardByteCodes.Jump: // TODO: UDK seems to compile this from break when inside ForEach, handle?
return DecompileJump();
// continue (iterator)
case (byte)StandardByteCodes.IteratorNext:
PopByte(); // pop iteratornext token
return DecompileJump();
// break;
case (byte)StandardByteCodes.IteratorPop:
return DecompileIteratorPop();
// stop;
case (byte)StandardByteCodes.Stop:
PopByte();
var stopStatement = new StopStatement(null, null);
StatementLocations.Add(StartPositions.Pop(), stopStatement);
return stopStatement;
// Goto label
case (byte)StandardByteCodes.GotoLabel:
PopByte();
var labelExpr = DecompileExpression();
var func = new SymbolReference(null, null, null, "goto");
var call = new FunctionCall(func, new List<Expression>() { labelExpr }, null, null);
var gotoLabel = new ExpressionOnlyStatement(null, null, call);
StatementLocations.Add(StartPositions.Pop(), gotoLabel);
return gotoLabel;
// assignable expression = expression;
case (byte)StandardByteCodes.Let:
case (byte)StandardByteCodes.LetBool:
case (byte)StandardByteCodes.LetDelegate:
return DecompileAssign();
// [skip x bytes]
case (byte)StandardByteCodes.Skip: // TODO: this should never occur as statement, possibly remove?
PopByte();
ReadUInt16();
StartPositions.Pop();
return DecompileStatement();
case (byte)StandardByteCodes.Nothing:
PopByte();
StartPositions.Pop();
return DecompileStatement(); // TODO, should probably have a nothing expression or statement, this is ugly
// foreach IteratorFunction(...)
case (byte)StandardByteCodes.Iterator:
return DecompileForEach();
// foreach arrayName(valuevariable[, indexvariable])
case (byte)StandardByteCodes.DynArrayIterator:
return DecompileForEach(isDynArray: true);
case (byte)StandardByteCodes.LabelTable:
DecompileLabelTable();
StartPositions.Pop();
return DecompileStatement();
#region unsupported
case (byte)StandardByteCodes.OptIfLocal: // TODO: verify, handle syntax
return DecompileConditionalJump(isOpt: true);
case (byte)StandardByteCodes.OptIfInstance: // TODO: verify, handle syntax
return DecompileConditionalJump(isOpt: true);
#endregion
default:
var expr = DecompileExpression();
if (expr != null)
{
var statement = new ExpressionOnlyStatement(null, null, expr);
StatementLocations.Add(StartPositions.Pop(), statement);
return statement;
}
// ERROR!
break;
}
return null;
}
