You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 

48 lines
1.7 KiB

using IPA.Utilities;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace IPA.Injector
{
internal static class GameVersionEarly
{
private static string ResolveDataPath(string installDir) =>
Path.Combine(Directory.EnumerateDirectories(installDir, "*_Data").First(), "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());
}
}