[longomatch] Add a helper function to properly detect OSX.

[Andoni Morales Alastruey <amorales src gnome org>]

commit cd5c900dd522001ada3705d9936e60a54c9c2298
Author: Josep Torra <n770galaxy gmail com>
Date:   Fri Apr 24 13:11:31 2015 +0200

    Add a helper function to properly detect OSX.

 LongoMatch.Core/Common/Utils.cs |   27 +++++++++++++++++++++++----
 1 files changed, 23 insertions(+), 4 deletions(-)
---
diff --git a/LongoMatch.Core/Common/Utils.cs b/LongoMatch.Core/Common/Utils.cs
index f06ffcb..5c4dc5c 100644
--- a/LongoMatch.Core/Common/Utils.cs
+++ b/LongoMatch.Core/Common/Utils.cs
@@ -22,17 +22,36 @@ namespace LongoMatch.Core.Common
 {
        public class Utils
        {
-               public static string SanitizePath(string path, params char[] replaceChars)
+               static int currentPlatformID = -1;
+
+               public static string SanitizePath (string path, params char[] replaceChars)
                {
-                       path = path.Trim();
+                       path = path.Trim ();
                        foreach (char c in Path.GetInvalidFileNameChars ()) {
-                               path = path.Replace(c, '_');
+                               path = path.Replace (c, '_');
                        }
                        foreach (char c in replaceChars) {
-                               path = path.Replace(c, '_');
+                               path = path.Replace (c, '_');
                        }
                        return path;
                }
+
+               public static PlatformID RunningPlatform ()
+               {
+                       if (currentPlatformID == -1) {
+                               currentPlatformID = (int)Environment.OSVersion.Platform;
+
+                               if (currentPlatformID == (int)PlatformID.Unix) {
+                                       if (Directory.Exists ("/Applications")
+                                           & Directory.Exists ("/System")
+                                           & Directory.Exists ("/Users")
+                                           & Directory.Exists ("/Volumes")) {
+                                               currentPlatformID = (int)PlatformID.MacOSX;
+                                       }
+                               }
+                       }
+                       return (PlatformID)currentPlatformID;
+               }
        }
 }