internal static void ChangePlatform(ref ReLogic.OS.Platform platform)
{
Type type;
switch (Environment.OSVersion.Platform)
{
case PlatformID.Unix:
type = typeof(ReLogic.OS.Platform).Assembly.GetType(IsRunningOnMac() ? "ReLogic.OS.OsxPlatform" : "ReLogic.OS.LinuxPlatform");
break;
case PlatformID.Win32NT:
type = typeof(ReLogic.OS.Platform).Assembly.GetType("ReLogic.OS.WindowsPlatform");
break;
default:
throw new NotSupportedException();
}
platform = (ReLogic.OS.Platform)Activator.CreateInstance(type);
}
public override void Run()
{
ReLogic.OS.Platform temp = null;
var changePlatformMethodDefinition = SourceDefinition.MainModule.Import(Method(() => Callbacks.PlatformConstructorCallback.ChangePlatform(ref temp)));
var field = Field(() => ReLogic.OS.Platform.Current);
var cctor = Type <ReLogic.OS.Platform>().Methods.Single(m => m.Name == ".cctor");
var instructions = cctor.Body.Instructions;
if (instructions?.Count != 3 || instructions[1].OpCode != OpCodes.Stsfld || instructions[1].Operand != field)
{
throw new NotSupportedException("Could not patch Platform..cctor()");
}
var processor = cctor.Body.GetILProcessor();
processor.Body.Instructions.Clear();
processor.Append(Instruction.Create(OpCodes.Ldsflda, field));
processor.Append(Instruction.Create(OpCodes.Call, changePlatformMethodDefinition));
processor.Append(Instruction.Create(OpCodes.Ret));
}
