Added NbtOptions.TypeForEmptyList

Author: TechPizzaDev

MCServerSharp.NBT/NbtOptions.cs

@@ -10,12 +10,19 @@ public struct NbtOptions
             IsBigEndian = true,
             IsVarArrayLength = false,
             IsVarStringLength = false,
-            MaxDepth = DefaultMaxDepth
+            MaxDepth = DefaultMaxDepth,
+            TypeForEmptyList = NbtType.End,
         };
 
         public bool IsBigEndian { get; set; }
         public bool IsVarArrayLength { get; set; }
         public bool IsVarStringLength { get; set; }
         public int MaxDepth { get; set; }
+
+        /// <summary>
+        /// The expected type for empty list tags. 
+        /// Can be <see langword="null"/> to skip validation.
+        /// </summary>
+        public NbtType? TypeForEmptyList { get; set; }
     }
 }

MCServerSharp.NBT/NbtReader.cs

@@ -268,7 +268,8 @@ public NbtReadStatus TryRead()
 
                     if (status != NbtReadStatus.Done)
                         goto ClearReturn;
-                    if (listLength <= 0 && listType != NbtType.End)
+                    if (listLength <= 0 && 
+                        Options.TypeForEmptyList.HasValue && listType != Options.TypeForEmptyList.GetValueOrDefault())
                     {
                         status = NbtReadStatus.InvalidListLength;
                         goto ClearReturn;