IL2CPP: Add IsModified flags to Metadata and Binary

Il2CppInspector.Common/IL2CPP/Il2CppBinary.cs

@@ -80,9 +80,13 @@ namespace Il2CppInspector
         // One assembly may contain multiple modules
         public Dictionary<string, Il2CppCodeGenModule> Modules { get; private set; }
 
+        // Status update callback
         private EventHandler<string> OnStatusUpdate { get; set; }
         private void StatusUpdate(string status) => OnStatusUpdate?.Invoke(this, status);
 
+        // Set if something in the binary has been modified / decrypted
+        public bool IsModified { get; private set; } = false;
+
         protected Il2CppBinary(IFileFormatReader stream, EventHandler<string> statusCallback = null) {
             Image = stream;
             OnStatusUpdate = statusCallback;

Il2CppInspector.Common/IL2CPP/Metadata.cs

@@ -45,6 +45,9 @@ namespace Il2CppInspector
 
         public Dictionary<int, string> Strings { get; } = new Dictionary<int, string>();
 
+        // Set if something in the metadata has been modified / decrypted
+        public bool IsModified { get; } = false;
+
         public Metadata(Stream stream, EventHandler<string> statusCallback = null) : base(stream)
         {
             // Read magic bytes
@@ -189,6 +192,7 @@ namespace Il2CppInspector
                     var decryptedString = Encoding.GetString(encryptedString.Select(b => (byte) (b ^ xorKey)).ToArray());
                     Strings.Add(offset.current, decryptedString);
                 }
+                IsModified = true;
             }
 
             // Get all managed code string literals

Il2CppInspector.Common/IL2CPP/ReconstructMetadata.cs

@@ -319,6 +319,9 @@ namespace Il2CppInspector
             CodeRegistration.unresolvedVirtualCallCount = 0;
             CodeRegistration.interopDataCount           = 0;
 
+            // TODO: Write changes to stream
+            IsModified = true;
+
             // Things we need from Il2CppMetadataRegistration
 
             // genericInsts               -> list of Il2CppGenericInst* (argc is count of Il2CppType* at data pointer argv; datapoint = GenericParameterIndex)
@@ -767,6 +770,8 @@ namespace Il2CppInspector
             MetadataRegistration.typeDefinitionsSizesCount = 0;
             MetadataRegistration.genericClassesCount       = MetadataRegistration.genericInstsCount + 1;
 
+            // TODO: Write changes to stream
+
             StatusUpdate("Analyzing IL2CPP image");
         }
     }