Extract device creation

src/windows-emulator/io_device.cpp

@@ -0,0 +1,29 @@
+#include "io_device.hpp"
+
+namespace
+{
+	struct dummy_device : stateless_device
+	{
+		void read() override
+		{
+		}
+
+		void write() override
+		{
+		}
+	};
+}
+
+std::unique_ptr<io_device> create_device(const std::wstring_view device)
+{
+	if (device == L"CNG"
+		|| device == L"KsecDD"
+		|| device == L"DeviceApi\\CMApi"
+		|| device == L"ConDrv\\Server"
+		|| device == L"Afd\\Endpoint")
+	{
+		return std::make_unique<dummy_device>();
+	}
+
+	throw std::runtime_error("Unsupported device: " + std::string(device.begin(), device.end()));
+}