public override void OutAPointerLvalue(APointerLvalue node)
{
PType type = data.ExpTypes[node.GetBase()];
if (!(type is APointerType))
{
errors.Add(new ErrorCollection.Error(node.GetTokens(), currentSourceFile, LocRM.GetString("ErrorText149")));
data.LvalueTypes[node] = type;
}
else
{
data.LvalueTypes[node] = ((APointerType) type).GetType();
}
base.OutAPointerLvalue(node);
}
public override void CaseAPointerLvalue(APointerLvalue node)
{
InAPointerLvalue(node);
if (node.GetBase() != null)
{
node.GetBase().Apply(this);
}
if (node.GetTokens() != null)
{
node.GetTokens().Apply(this);
}
OutAPointerLvalue(node);
}
public override void CaseAPointerLvalue(APointerLvalue node)
{
//Build the list
currentPointer.Clear();
base.CaseAPointerLvalue(node);
//Todo: insert runtime check here
//if (currentPointer.Count == 0 || !setPointers.Contains(MakePointer(currentPointer)))
if (!isSet)
{
PStm pStm = Util.GetAncestor<PStm>(node);
if (pStm != null)
{
AABlock pBlock = (AABlock) pStm.Parent();
/*
* if (<pointer> == null)
* {
* UIDisplayMessage(PlayerGroupAll, messageAreaDebug, StringToText(<filename>[<lineNr>:<pos>] + " null pointer exception"));
* int i = 1 / 0;
* }
*/
AASourceFile currentSourceFile = Util.GetAncestor<AASourceFile>(node);
node.GetBase().Apply(new MoveMethodDeclsOut("pointerVar", data));
PExp pointer = Util.MakeClone(node.GetBase(), data);
ABinopExp cond = new ABinopExp(pointer, new AEqBinop(new TEq("==")), new ANullExp());
AABlock ifBlock = new AABlock();
ASimpleInvokeExp playerGroupAllInvoke = new ASimpleInvokeExp(new TIdentifier("PlayerGroupAll"), new ArrayList());
AFieldLvalue messageAreaDebugLink = new AFieldLvalue(new TIdentifier("c_messageAreaDebug"));
ALvalueExp messageAreaDebugLinkExp = new ALvalueExp(messageAreaDebugLink);
ASimpleInvokeExp stringToTextInvoke = new ASimpleInvokeExp(new TIdentifier("StringToText"),
new ArrayList()
{
new AStringConstExp(
new TStringLiteral("\"" +
currentSourceFile
.
GetName
()
.
Text +
"[" +
node.
GetTokens
()
.
Line +
"," +
node.
GetTokens
()
.
Pos +
"]: Null pointer exception\""))
});
ASimpleInvokeExp displayMessageInvoke = new ASimpleInvokeExp(
new TIdentifier("UIDisplayMessage"),
new ArrayList() {playerGroupAllInvoke, messageAreaDebugLinkExp, stringToTextInvoke});
ifBlock.GetStatements().Add(new AExpStm(new TSemicolon(";"), displayMessageInvoke));
ABinopExp iDeclInit = new ABinopExp(new AIntConstExp(new TIntegerLiteral("1")),
new ADivideBinop(new TDiv("/")),
new AIntConstExp(new TIntegerLiteral("0")));
AALocalDecl iDecl = new AALocalDecl(new APublicVisibilityModifier(), null, null, null, null, new ANamedType(new TIdentifier("int"), null), new TIdentifier("i"), iDeclInit);
ifBlock.GetStatements().Add(new ALocalDeclStm(new TSemicolon(";"), iDecl));
pBlock.GetStatements().Insert(pBlock.GetStatements().IndexOf(pStm),
new AIfThenStm(new TLParen("("), cond,
new ABlockStm(new TLBrace("{"), ifBlock)));
data.Locals[ifBlock] = new List<AALocalDecl>(){iDecl};
data.ExpTypes[cond.GetRight()] = new ANullType();
data.ExpTypes[cond] = new ANamedType(new TIdentifier("bool"), null);
data.ExpTypes[playerGroupAllInvoke] = new ANamedType(new TIdentifier("playergroup"), null);
data.ExpTypes[messageAreaDebugLinkExp] =
data.LvalueTypes[messageAreaDebugLink] =
data.ExpTypes[iDeclInit] =
data.ExpTypes[iDeclInit.GetLeft()] =
data.ExpTypes[iDeclInit.GetRight()] = new ANamedType(new TIdentifier("int"), null);
data.ExpTypes[stringToTextInvoke] = new ANamedType(new TIdentifier("text"), null);
data.ExpTypes[(PExp) stringToTextInvoke.GetArgs()[0]] = new ANamedType(new TIdentifier("string"), null);
data.ExpTypes[displayMessageInvoke] = new AVoidType(new TVoid("void"));
data.SimpleMethodLinks[playerGroupAllInvoke] =
data.Libraries.Methods.Find(m => m.GetName().Text == playerGroupAllInvoke.GetName().Text);
data.SimpleMethodLinks[displayMessageInvoke] =
data.Libraries.Methods.Find(m => m.GetName().Text == displayMessageInvoke.GetName().Text);
data.SimpleMethodLinks[stringToTextInvoke] =
data.Libraries.Methods.Find(m => m.GetName().Text == stringToTextInvoke.GetName().Text);
data.FieldLinks[messageAreaDebugLink] =
data.Libraries.Fields.Find(f => f.GetName().Text == messageAreaDebugLink.GetName().Text);
if (currentPointer.Count > 0)
{
setPointers.Add(MakePointer(currentPointer));
}
}
}
currentPointer.Add(new PointerPointer());
currentPointer = MakePointer(currentPointer);
isSet = Contains(setPointers, currentPointer);
isExposed = Contains(exposedPointers, currentPointer);
//If the currentPointer is in null pointers, report error.. and then again - we might not reach this statement - warning, and runtime check
//If the currentPointer is not in setPointers, insert runtime check
}