using IPA.Utilities; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; #if NET3 using Net3_Proxy; using Path = Net3_Proxy.Path; using File = Net3_Proxy.File; using Directory = Net3_Proxy.Directory; #endif namespace IPA.Injector { internal static class GameVersionEarly { internal static string ResolveDataPath(string installDir) => Directory.EnumerateDirectories(installDir, "*_Data").First(); internal static string GlobalGameManagers(string installDir) => Path.Combine(ResolveDataPath(installDir), "globalgamemanagers"); internal static string GetGameVersion() { var mgr = ResolveDataPath(BeatSaber.InstallPath); using (var stream = File.OpenRead(mgr)) using (var reader = new BinaryReader(stream, Encoding.UTF8)) { const string key = "public.app-category.games"; int pos = 0; while (stream.Position < stream.Length && pos < key.Length) { if (reader.ReadByte() == key[pos]) pos++; else pos = 0; } if (stream.Position == stream.Length) // we went through the entire stream without finding the key throw new KeyNotFoundException("Could not find key '" + key + "' in " + mgr); // otherwise pos == key.Length, which means we found it int offset = 136 - key.Length - sizeof(int); stream.Seek(offset, SeekOrigin.Current); // advance past junk to beginning of string int strlen = reader.ReadInt32(); // assumes LE var strbytes = reader.ReadBytes(strlen); return Encoding.UTF8.GetString(strbytes); } } internal static SemVer.Version SafeParseVersion() => new SemVer.Version(GetGameVersion(), true); internal static void Load() => BeatSaber.SetEarlyGameVersion(SafeParseVersion()); } }