Mac support

Programs/GridProxyGUI/PlatformDetection.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+
+namespace GridProxyGUI
+{
+	public static class PlatformDetection
+	{
+		public readonly static bool IsWindows;
+		public readonly static bool IsMac;
+		
+		static PlatformDetection ()
+		{
+			IsWindows = Path.DirectorySeparatorChar == '\\';
+			IsMac = !IsWindows && IsRunningOnMac();
+		}
+		
+		//From Managed.Windows.Forms/XplatUI
+		static bool IsRunningOnMac ()
+		{
+			IntPtr buf = IntPtr.Zero;
+			try {
+				buf = System.Runtime.InteropServices.Marshal.AllocHGlobal (8192);
+				// This is a hacktastic way of getting sysname from uname ()
+				if (uname (buf) == 0) {
+					string os = System.Runtime.InteropServices.Marshal.PtrToStringAnsi (buf);
+					if (os == "Darwin")
+						return true;
+				}
+			} catch {
+			} finally {
+				if (buf != IntPtr.Zero)
+					System.Runtime.InteropServices.Marshal.FreeHGlobal (buf);
+			}
+			return false;
+		}
+		
+		[System.Runtime.InteropServices.DllImport ("libc")]
+		static extern int uname (IntPtr buf);
+	}
+}
+