Initial commit

DataFixupUtil/DataFixupUtil.csproj

@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

DataFixupUtil/Program.cs

@@ -0,0 +1,57 @@
+using System.IO;
+using System.IO.Compression;
+
+namespace DataFixupUtil
+{
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+
+            foreach(var arg in Directory.GetFiles("C:\\NIKKE\\NIKKE\\Game"))
+            {
+                var fileName = Path.GetFileName(arg);
+                if (fileName.StartsWith("input"))
+                {
+                    byte[] FileContents = File.ReadAllBytes(arg);
+                    using MemoryStream ms = new MemoryStream(FileContents);
+                    File.WriteAllBytes("fullPkt-decr", ms.ToArray());
+
+                    var unkVal1 = ms.ReadByte();
+                    var pktLen = ms.ReadByte() & 0x1f;
+
+
+                    var seqNumB = ms.ReadByte();
+                    var seqNum = seqNumB;
+                    if (seqNumB >= 24)
+                    {
+                        var b = ms.ReadByte();
+
+                        seqNum = BitConverter.ToUInt16(new byte[] { (byte)b, (byte)seqNumB }, 0);
+
+                        // todo support uint32
+                    }
+
+                    var startPos = (int)ms.Position;
+
+                    var contents = FileContents.Skip(startPos).ToArray();
+                    if (contents.Length != 0 && contents[0] == 31)
+                    {
+                        // gzip compression is used
+                        using Stream csStream = new GZipStream(new MemoryStream(contents), CompressionMode.Decompress);
+                        using MemoryStream decoded = new MemoryStream();
+                        csStream.CopyTo(decoded);
+
+                        contents = decoded.ToArray();
+                        File.WriteAllBytes(arg, contents);
+                    }
+                    else
+                    {
+                        File.WriteAllBytes(arg, contents);
+                    }
+                }
+            }
+        }
+    }
+}