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@@ -0,0 +1,153 @@
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+using System;
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+using System.IO;
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+using System.Reflection;
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+using System.Runtime.InteropServices;
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+using MonoMod.Utils;
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+
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+namespace BepInEx.Preloader
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+{
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+ internal static class PlatformUtils
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+ {
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+ [StructLayout(LayoutKind.Sequential, Pack = 1)]
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+ public struct utsname_osx
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+ {
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+ private const int osx_utslen = 256;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = osx_utslen)]
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+ public string sysname;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = osx_utslen)]
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+ public string nodename;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = osx_utslen)]
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+ public string release;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = osx_utslen)]
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+ public string version;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = osx_utslen)]
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+ public string machine;
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+ }
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+
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+ [StructLayout(LayoutKind.Sequential, Pack = 1)]
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+ public struct utsname_linux
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+ {
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+ private const int linux_utslen = 65;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string sysname;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string nodename;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string release;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string version;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string machine;
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+
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+ [MarshalAs(UnmanagedType.ByValTStr, SizeConst = linux_utslen)]
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+ public string domainname;
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+ }
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+
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+ [DllImport("libc.so.6", EntryPoint = "uname", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
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+ private static extern IntPtr uname_linux(ref utsname_linux utsname);
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+
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+ [DllImport("/usr/lib/libSystem.dylib", EntryPoint = "uname", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
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+ private static extern IntPtr uname_osx(ref utsname_osx utsname);
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+
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+ /// <summary>
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+ /// Recreation of MonoMod's PlatformHelper.DeterminePlatform method, but with libc calls instead of creating processes.
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+ /// </summary>
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+ public static void SetPlatform()
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+ {
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+ var current = Platform.Unknown;
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+
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+ // For old Mono, get from a private property to accurately get the platform.
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+ // static extern PlatformID Platform
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+ PropertyInfo p_Platform = typeof(Environment).GetProperty("Platform", BindingFlags.NonPublic | BindingFlags.Static);
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+ string platID;
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+ if (p_Platform != null)
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+ {
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+ platID = p_Platform.GetValue(null, new object[0]).ToString();
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+ }
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+ else
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+ {
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+ // For .NET and newer Mono, use the usual value.
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+ platID = Environment.OSVersion.Platform.ToString();
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+ }
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+ platID = platID.ToLowerInvariant();
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+
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+ if (platID.Contains("win"))
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+ {
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+ current = Platform.Windows;
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+ }
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+ else if (platID.Contains("mac") || platID.Contains("osx"))
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+ {
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+ current = Platform.MacOS;
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+ }
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+ else if (platID.Contains("lin") || platID.Contains("unix"))
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+ {
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+ current = Platform.Linux;
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+ }
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+
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+ if (Is(current, Platform.Linux) && Directory.Exists("/data") && File.Exists("/system/build.prop"))
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+ {
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+ current = Platform.Android;
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+ }
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+ else if (Is(current, Platform.Unix) && Directory.Exists("/Applications") && Directory.Exists("/System"))
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+ {
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+ current = Platform.iOS;
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+ }
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+
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+ // Is64BitOperatingSystem has been added in .NET Framework 4.0
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+ MethodInfo m_get_Is64BitOperatingSystem = typeof(Environment).GetProperty("Is64BitOperatingSystem")?.GetGetMethod();
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+ if (m_get_Is64BitOperatingSystem != null)
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+ current |= (((bool)m_get_Is64BitOperatingSystem.Invoke(null, new object[0])) ? Platform.Bits64 : 0);
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+ else
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+ current |= (IntPtr.Size >= 8 ? Platform.Bits64 : 0);
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+
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+ File.AppendAllText("scuffed_debug.log", $"{platID}\n{current}");
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+
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+ if ((Is(current, Platform.MacOS) || Is(current, Platform.Linux)) && Type.GetType("Mono.Runtime") != null)
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+ {
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+ string arch;
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+ IntPtr result;
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+
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+ if (Is(current, Platform.MacOS))
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+ {
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+ utsname_osx utsname_osx = new utsname_osx();
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+ result = uname_osx(ref utsname_osx);
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+ arch = utsname_osx.machine;
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+ }
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+ else
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+ {
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+ // Linux
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+ utsname_linux utsname_linux = new utsname_linux();
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+ result = uname_linux(ref utsname_linux);
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+ arch = utsname_linux.machine;
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+ }
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+
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+ if (result == IntPtr.Zero && (arch.StartsWith("aarch") || arch.StartsWith("arm")))
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+ current |= Platform.ARM;
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+ }
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+ else
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+ {
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+ // Detect ARM based on PE info or uname.
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+ typeof(object).Module.GetPEKind(out PortableExecutableKinds peKind, out ImageFileMachine machine);
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+ if (machine == (ImageFileMachine)0x01C4 /* ARM, .NET Framework 4.5 */)
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+ current |= Platform.ARM;
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+ }
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+
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+ PlatformHelper.Current = current;
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+ }
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+
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+ private static bool Is(Platform current, Platform expected)
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+ {
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+ return (current & expected) == expected;
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+ }
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+ }
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+}
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Bepis