[banshee] [PlatformDetection] more extensive probing

[Aaron Bockover <abock src gnome org>]

commit fa065289a9dd2d5a240898372e4ed1741c567416
Author: Aaron Bockover <abockover novell com>
Date:   Sun Feb 7 12:52:56 2010 -0500

    [PlatformDetection] more extensive probing
    
    Renamed PlatformUtil to PlatformDetection, and implemented more
    extensive probing. Detects Windows, Linux, Unix, and Mac OS X,
    and will detect environments like Moblin, GNOME, etc. later.

 src/Libraries/Hyena/Hyena.csproj               |    4 +-
 src/Libraries/Hyena/Hyena/PlatformDetection.cs |   90 ++++++++++++++++++++++++
 src/Libraries/Hyena/Hyena/PlatformUtil.cs      |   45 ------------
 src/Libraries/Hyena/Makefile.am                |    2 +-
 4 files changed, 94 insertions(+), 47 deletions(-)
---
diff --git a/src/Libraries/Hyena/Hyena.csproj b/src/Libraries/Hyena/Hyena.csproj
index fa80869..867790a 100644
--- a/src/Libraries/Hyena/Hyena.csproj
+++ b/src/Libraries/Hyena/Hyena.csproj
@@ -34,6 +34,7 @@
     </CustomCommands>
     <WarningLevel>4</WarningLevel>
     <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Windows|AnyCPU' ">
     <DebugSymbols>true</DebugSymbols>
@@ -41,6 +42,7 @@
     <PlatformTarget>x86</PlatformTarget>
     <WarningLevel>4</WarningLevel>
     <Optimize>false</Optimize>
+    <OutputPath>bin\Windows</OutputPath>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Hyena.Data\BaseListModel.cs" />
@@ -118,7 +120,6 @@
     <Compile Include="Hyena.Data.Sqlite\SqliteUtils.cs" />
     <Compile Include="Hyena\Log.cs" />
     <Compile Include="Hyena\CryptoUtil.cs" />
-    <Compile Include="Hyena\PlatformUtil.cs" />
     <Compile Include="Hyena.Query\IntegerKeyedObjectQueryValue.cs" />
     <Compile Include="Hyena\ConsoleCrayon.cs" />
     <Compile Include="Hyena\ApplicationContext.cs" />
@@ -167,6 +168,7 @@
     <Compile Include="Hyena\EventArgs.cs" />
     <Compile Include="System.Web\Helpers.cs" />
     <Compile Include="System.Web\HttpUtility.cs" />
+    <Compile Include="Hyena\PlatformDetection.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="Mono.Posix">
diff --git a/src/Libraries/Hyena/Hyena/PlatformDetection.cs b/src/Libraries/Hyena/Hyena/PlatformDetection.cs
new file mode 100644
index 0000000..42418ee
--- /dev/null
+++ b/src/Libraries/Hyena/Hyena/PlatformDetection.cs
@@ -0,0 +1,90 @@
+//
+// PlatformUtil.cs
+//
+// Author:
+//   Aaron Bockover <abockover novell com>
+//
+// Copyright 2010 Novell, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Hyena
+{
+    public static class PlatformDetection
+    {
+        public static readonly bool IsMac;
+        public static readonly bool IsWindows;
+        public static readonly bool IsLinux;
+        public static readonly bool IsUnix;
+        public static readonly bool IsPosix;
+        public static readonly bool IsMoblin;
+
+        public static readonly string PosixSystemName;
+
+        [DllImport ("libc")]
+        private static extern int uname (IntPtr utsname);
+
+        static PlatformDetection ()
+        {
+            // From http://www.mono-project.com/FAQ:_Technical
+            int p = (int)Environment.OSVersion.Platform;
+            IsUnix = p == 4 || p == 6 || p == 128;
+            IsWindows = p < 4;
+
+            if (IsWindows) {
+                return;
+            }
+
+            // uname expects a pointer to a utsname structure, but we are
+            // tricky here - this structure's first field is the field we
+            // care about (char sysname []); the size of the structure is
+            // unknown, as it varies on all platforms. Darwin uses only
+            // the five POSIX fields, each 256 bytes, so the total size is
+            // total size is 5 * 256 = 1280 bytes. Arbitrarily using 8192.
+            var utsname = IntPtr.Zero;
+            try {
+                utsname = Marshal.AllocHGlobal (8192);
+                if (uname (utsname) == 0) {
+                    PosixSystemName = Marshal.PtrToStringAnsi (utsname);
+                }
+            } catch {
+            } finally {
+                if (utsname != IntPtr.Zero) {
+                    Marshal.FreeHGlobal (utsname);
+                }
+            }
+
+            if (PosixSystemName == null) {
+                return;
+            }
+
+            switch (PosixSystemName) {
+                case "Darwin": IsMac = true; break;
+                case "Linux": IsLinux = true; break;
+            }
+
+            // FIXME: probe the root X11 window for Moblin properties
+        }
+    }
+}
diff --git a/src/Libraries/Hyena/Makefile.am b/src/Libraries/Hyena/Makefile.am
index 715b5bd..e36b92c 100644
--- a/src/Libraries/Hyena/Makefile.am
+++ b/src/Libraries/Hyena/Makefile.am
@@ -115,7 +115,7 @@ SOURCES =  \
 	Hyena/EventArgs.cs \
 	Hyena/IUndoAction.cs \
 	Hyena/Log.cs \
-	Hyena/PlatformUtil.cs \
+	Hyena/PlatformDetection.cs \
 	Hyena/StringUtil.cs \
 	Hyena/Tests/CryptoUtilTests.cs \
 	Hyena/Tests/StringUtilTests.cs \