From b02abbe150466527c15a2438965dcc713cac60ab Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Thu, 28 Feb 2008 13:39:42 +0000
Subject: [PATCH] Initial commit. Can detect if we are running on Windows,
 Linux or OSX.

---
 Source/OpenTK/Configuration.cs | 126 +++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 Source/OpenTK/Configuration.cs

diff --git a/Source/OpenTK/Configuration.cs b/Source/OpenTK/Configuration.cs
new file mode 100644
index 00000000..7e4de1cd
--- /dev/null
+++ b/Source/OpenTK/Configuration.cs
@@ -0,0 +1,126 @@
+#region --- License ---
+/* Licensed under the MIT/X11 license.
+ * Copyright (c) 2006-2008 the OpenTK Team.
+ * This notice may not be removed from any source distribution.
+ * See license.txt for licensing detailed licensing details.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Diagnostics;
+using System.IO;
+
+namespace OpenTK
+{
+    /// <internal />
+    /// <summary>Contains configuration options for OpenTK.</summary>
+    internal static class Configuration
+    {
+        static bool runningOnWindows, runningOnX11, runningOnOSX;
+
+        #region --- Constructors ---
+
+        static Configuration()
+        {
+            if (System.Environment.OSVersion.Platform == PlatformID.Win32NT ||
+                System.Environment.OSVersion.Platform == PlatformID.Win32S ||
+                System.Environment.OSVersion.Platform == PlatformID.Win32Windows ||
+                System.Environment.OSVersion.Platform == PlatformID.WinCE)
+                runningOnWindows = true;
+            else if (System.Environment.OSVersion.Platform == PlatformID.Unix ||
+                     System.Environment.OSVersion.Platform == (PlatformID)4)
+            {
+                // Distinguish between Unix and Mac OS X kernels.
+                switch (DetectUnixKernel())
+                {
+                    case "Unix":
+                    case "Linux":
+                        runningOnX11 = true;
+                        break;
+
+                    case "Darwin":
+                        runningOnOSX = true;
+                        break;
+
+                    default:
+                        throw new PlatformNotSupportedException(
+                            DetectUnixKernel() + ": Unknown Unix platform. Please report this error at http://www.opentk.com.");
+                }
+            }
+            else
+                throw new PlatformNotSupportedException("Unknown platform. Please report this error at http://www.opentk.com.");
+        }
+
+        #endregion
+
+        #region --- Public Methods ---
+
+        #region internal static bool RunningOnWindows
+
+        /// <summary>Gets a System.Boolean indicating whether OpenTK is running on a Windows platform.</summary>
+        internal static bool RunningOnWindows { get { return runningOnWindows; } }
+
+        #endregion
+
+        #region internal static bool  RunningOnX11
+
+        /// <summary>Gets a System.Boolean indicating whether OpenTK is running on an X11 platform.</summary>
+        internal static bool RunningOnX11 { get { return runningOnX11; } }
+
+        #endregion
+
+        #region internal static bool  RunningOnOSX
+
+        /// <summary>Gets a System.Boolean indicating whether OpenTK is running on an OSX platform.</summary>
+        internal static bool RunningOnOSX { get { return runningOnOSX; } }
+
+        #endregion
+
+        #region --- Private Methods ---
+
+        #region private static string DetectUnixKernel()
+
+        /// <summary>
+        /// Executes "uname" which returns a string representing the name of the
+        /// underlying Unix kernel.
+        /// </summary>
+        /// <returns>"Unix", "Linux", "Darwin" or null.</returns>
+        /// <remarks>Source code from "Mono: A Developer's Notebook"</remarks>
+        private static string DetectUnixKernel()
+        {
+            ProcessStartInfo startInfo = new ProcessStartInfo();
+            startInfo.Arguments = "-s";
+            startInfo.RedirectStandardOutput = true;
+            startInfo.RedirectStandardError = true;
+            startInfo.UseShellExecute = false;
+            foreach (string unameprog in new string[] { "/usr/bin/uname", "/bin/uname", "uname" })
+            {
+                try
+                {
+                    startInfo.FileName = unameprog;
+                    Process uname = Process.Start(startInfo);
+                    StreamReader stdout = uname.StandardOutput;
+                    return stdout.ReadLine().Trim();
+                }
+                catch (System.IO.FileNotFoundException)
+                {
+                    // The requested executable doesn't exist, try next one.
+                    continue;
+                }
+                catch (System.ComponentModel.Win32Exception)
+                {
+                    continue;
+                }
+            }
+            return null;
+        }
+
+        #endregion
+
+        #endregion
+
+        #endregion
+    }
+}