private static T FindOrLoadObject <T>(string pathName) where T : UObject
{
if (typeof(T) == typeof(UPackage))
{
return(FindOrLoadPackage(pathName) as T);
}
// If there is no dot, add a dot and repeat the object name.
int packageDelimPos = pathName.IndexOf('.');
if (packageDelimPos == -1)
{
int objectNameStart = pathName.LastIndexOf('/');
if (objectNameStart != -1)
{
pathName += "." + pathName.Substring(objectNameStart + 1);
}
}
UClass unrealClass = UClass.GetClass <T>();
if (unrealClass != null)
{
unrealClass.GetDefaultObject();// force the CDO to be created if it hasn't already
T obj = UObject.LoadObject <T>(null, pathName);
if (obj != null)
{
obj.AddToRoot();
}
return(obj);
}
return(null);
}
public static unsafe void HackVTable(UObject obj)
{
// This will swap out the vtable entry and store the old one in our managed UClass
if (!Native_UObjectBaseUtility.IsA(obj.Address, Runtime.Classes.UClass))
{
UClass unrealClass = obj.GetClass();
if (unrealClass.VTableOriginalFunctions == null)
{
IntPtr *vtable = *(IntPtr **)obj.Address;
unrealClass.VTableOriginalFunctions = new Dictionary <int, UClass.VTableOriginalFunc>();
foreach (FunctionRedirect redirect in vtableRedirects)
{
if (!Native_UObjectBaseUtility.IsA(obj.Address, redirect.Class))
{
continue;
}
IntPtr originalFunctionAddress = vtable[redirect.VTableIndex];
if (originalFunctionAddress != redirect.NativeCallback)
{
IntPtr originalOwnerClassAddress = FindOriginalVTableOwner(
redirect.Class, unrealClass.Address, originalFunctionAddress, redirect.VTableIndex);
if (originalOwnerClassAddress != unrealClass.Address)
{
UClass originalOwnerClass = GCHelper.Find <UClass>(originalOwnerClassAddress);
if (originalOwnerClass.VTableOriginalFunctions == null)
{
HackVTable(originalOwnerClass.GetDefaultObject());
}
}
IntPtr pageAlignedPtr = FMemory.PageAlignPointer((IntPtr)(&vtable[redirect.VTableIndex]));
FMemory.PageProtect(pageAlignedPtr, (IntPtr)IntPtr.Size, true, true);
*(&vtable[redirect.VTableIndex]) = redirect.NativeCallback;
}
else
{
// The VTable has already been swapped out. Find the original function address.
UClass superClass = unrealClass;
while ((superClass = superClass.GetSuperClass()) != null && superClass.VTableOriginalFunctions == null)
{
}
Debug.Assert(superClass != null && superClass.VTableOriginalFunctions != null &&
superClass.VTableOriginalFunctions.ContainsKey(redirect.VTableIndex));
originalFunctionAddress = superClass.VTableOriginalFunctions[redirect.VTableIndex].FuncAddress;
}
unrealClass.VTableOriginalFunctions.Add(redirect.VTableIndex, new UClass.VTableOriginalFunc(originalFunctionAddress));
}
}
}
}
/// <summary>
/// Get default object of a class.
/// </summary>
public static T GetDefault <T>() where T : UObject
{
UClass unrealClass = UClass.GetClass <T>();
if (unrealClass != null)
{
return(unrealClass.GetDefaultObject() as T);
}
return(null);
}
/// <summary>
/// Get the CDO if we are referencing a valid class
/// </summary>
/// <returns>the CDO, or NULL</returns>
public T GetDefaultObject()
{
UClass unrealClass = Value;
if (unrealClass != null)
{
return(unrealClass.GetDefaultObject() as T);
}
return(null);
}
/// <summary>
/// Gets the default object of a class.
/// </summary>
/// <typeparam name="T">The object type</typeparam>
/// <param name="unrealClass">The class to get the CDO for.</param>
/// <returns>Class default object (CDO).</returns>
public static T GetDefault <T>(UClass unrealClass) where T : UObject
{
if (unrealClass != null && unrealClass.IsA <T>())
{
UObject defaultObject = unrealClass.GetDefaultObject();
if (defaultObject.IsA <T>())
{
return(defaultObject as T);
}
}
return(null);
}
