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Improve parity handling of null in various operators #2129

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Improve parity handling of null in various operators #2129

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fff6c2a
Improve parity handling of `null` in various operators
Dec 10, 2024
85b4640
remove duplicated code
Dec 10, 2024
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0 .../Broken Tests/Operators/valid_and_null.dm → ...Project/Tests/Operators/valid_and_null.dm
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0 ... Tests/Operators/valid_and_null_assign.dm → .../Tests/Operators/valid_and_null_assign.dm
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48 changes: 39 additions & 9 deletions OpenDreamRuntime/Procs/DMOpcodeHandlers.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -923,14 +923,16 @@ public static ProcStatus BitShiftLeft(DMProcState state) {
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
state.Push(new DreamValue(first.MustGetValueAsInteger() << second.MustGetValueAsInteger()));
break;
case DreamValue.DreamValueType.Float when second.IsNull:
state.Push(new DreamValue(first.MustGetValueAsInteger()));
break;
default:
throw new Exception($"Invalid bit shift left operation on {first} and {second}");
}

return ProcStatus.Continue;
}


public static ProcStatus BitShiftLeftReference(DMProcState state) {
DreamReference reference = state.ReadReference();
DreamValue second = state.Pop();
Expand All @@ -943,9 +945,13 @@ public static ProcStatus BitShiftLeftReference(DMProcState state) {
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
result = new DreamValue(first.MustGetValueAsInteger() << second.MustGetValueAsInteger());
break;
case DreamValue.DreamValueType.Float when second.IsNull:
result = new DreamValue(first.MustGetValueAsInteger());
break;
default:
throw new Exception($"Invalid bit shift left operation on {first} and {second}");
}

state.AssignReference(reference, result);
state.Push(result);
return ProcStatus.Continue;
Expand All @@ -955,12 +961,18 @@ public static ProcStatus BitShiftRight(DMProcState state) {
DreamValue second = state.Pop();
DreamValue first = state.Pop();

if (first.IsNull) {
state.Push(new DreamValue(0));
} else if (first.Type == DreamValue.DreamValueType.Float && second.Type == DreamValue.DreamValueType.Float) {
state.Push(new DreamValue(first.MustGetValueAsInteger() >> second.MustGetValueAsInteger()));
} else {
throw new Exception($"Invalid bit shift right operation on {first} and {second}");
switch (first.Type) {
case DreamValue.DreamValueType.DreamObject when first.IsNull:
state.Push(new DreamValue(0));
break;
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
state.Push(new DreamValue(first.MustGetValueAsInteger() >> second.MustGetValueAsInteger()));
break;
case DreamValue.DreamValueType.Float when second.IsNull:
state.Push(new DreamValue(first.MustGetValueAsInteger()));
break;
default:
throw new Exception($"Invalid bit shift right operation on {first} and {second}");
}

return ProcStatus.Continue;
Expand All @@ -978,9 +990,13 @@ public static ProcStatus BitShiftRightReference(DMProcState state) {
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
result = new DreamValue(first.MustGetValueAsInteger() >> second.MustGetValueAsInteger());
break;
case DreamValue.DreamValueType.Float when second.IsNull:
result = new DreamValue(first.MustGetValueAsInteger());
break;
default:
throw new Exception($"Invalid bit shift right operation on {first} and {second}");
}

state.AssignReference(reference, result);
state.Push(result);
return ProcStatus.Continue;
Expand Down Expand Up @@ -1128,6 +1144,9 @@ public static ProcStatus Mask(DMProcState state) {
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
result = new DreamValue(first.MustGetValueAsInteger() & second.MustGetValueAsInteger());
break;
case DreamValue.DreamValueType.Float when second.IsNull:
result = new DreamValue(0);
break;
default:
throw new Exception("Invalid mask operation on " + first + " and " + second);
}
Expand Down Expand Up @@ -2728,8 +2747,19 @@ private static DreamValue BitXorValues(DreamObjectTree objectTree, DreamValue fi
}

return new DreamValue(newList);
} else {
return new DreamValue(first.MustGetValueAsInteger() ^ second.MustGetValueAsInteger());
}

switch (first.Type) {
case DreamValue.DreamValueType.Float when second.Type == DreamValue.DreamValueType.Float:
return new DreamValue(first.MustGetValueAsInteger() ^ second.MustGetValueAsInteger());
case DreamValue.DreamValueType.DreamObject when first.IsNull && second.IsNull:
return DreamValue.Null;
case DreamValue.DreamValueType.DreamObject when first.IsNull && second.Type == DreamValue.DreamValueType.Float:
return new DreamValue(second.MustGetValueAsInteger());
case DreamValue.DreamValueType.Float when second.IsNull:
return new DreamValue(first.MustGetValueAsInteger());
default:
throw new Exception($"Invalid xor operation on {first} and {second}");
}
}

Expand Down
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