Port NBT impl from LibAC Dart

NBT/LongArrayTag.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using LibAC.NBT.API;
+
+namespace LibAC.NBT
+{
+    public class LongArrayTag : Tag
+    {
+        public List<long> value { get; private set; } = new List<long>();
+
+        public LongArrayTag() { }
+
+        public LongArrayTag(List<long> lst)
+        {
+            value.AddRange(lst);
+        }
+
+        public static LongArrayTag ValueOf(List<long> value)
+        {
+            return new LongArrayTag(value);
+        }
+
+        public override void ReadValue(ByteLayer data)
+        {
+            int count = data.ReadInt();
+            for (int i = 0; i < count; i++)
+            {
+                value.Add(data.ReadLong());
+            }
+        }
+
+        public override void WriteValue(ByteLayer data)
+        {
+            data.WriteInt(Size());
+            foreach (long val in value)
+            {
+                data.WriteLong(val);
+            }
+        }
+
+        public int Size()
+        {
+            return value.Count;
+        }
+
+        public override TagType GetTagType()
+        {
+            return TagType.LongArray;
+        }
+
+        public override void SetValue(dynamic val) { }
+
+        public override dynamic GetValue()
+        {
+            return null;
+        }
+
+        public override void PrettyPrint(int indent, bool recurse)
+        {
+            string array = string.Join(", ", value);
+            Console.WriteLine($"{new string('\t', indent)}{Tag.GetCanonicalName(GetTagType())}: [{array}]");
+        }
+
+        public override void WriteStringifiedValue(StringBuilder builder, int indent, bool isList)
+        {
+            builder.Append($"{(isList ? new string('\t', indent) : "")}[L; {string.Join("L, ", value)}L]");
+        }
+
+        public override void ReadStringifiedValue(StringReader reader)
+        {
+            reader.Expect('[');
+            reader.Expect('L');
+            reader.Expect(';');
+            while (reader.Peek() != ']')
+            {
+                value.Add(long.Parse(reader.ReadNumber()));
+                reader.Expect('l');
+
+                if (reader.Peek() == ',') reader.Next();
+            }
+            reader.Expect(']');
+        }
+    }
+}