<NME> Image.cs
<BEF> ADDFILE
<MSG> skip non .net references

<DFF> @@ -0,0 +1,105 @@
+﻿//
+// Image.cs
+//
+// Author:
+//   Jb Evain (jbevain@novell.com)
+//
+// (C) 2009 - 2010 Novell, Inc. (http://www.novell.com)
+//
+// 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.IO;
+public static class Image
+{
+    static bool Advance(this Stream stream, int length)
+    {
+        if (stream.Position + length >= stream.Length)
+        {
+            return false;
+        }
+
+        stream.Seek(length, SeekOrigin.Current);
+        return true;
+    }
+
+    static bool MoveTo(this Stream stream, uint position)
+    {
+        if (position >= stream.Length)
+        {
+            return false;
+        }
+
+        stream.Position = position;
+        return true;
+    }
+
+    static ushort ReadUInt16(this Stream stream)
+    {
+        return (ushort)(stream.ReadByte()
+                        | (stream.ReadByte() << 8));
+    }
+
+    static uint ReadUInt32(this Stream stream)
+    {
+        return (uint)(stream.ReadByte()
+                      | (stream.ReadByte() << 8)
+                      | (stream.ReadByte() << 16)
+                      | (stream.ReadByte() << 24));
+    }
+
+    public static bool IsAssembly(string file)
+    {
+        using (var stream = File.OpenRead(file))
+        {
+            if (stream.Length < 318)
+            {
+                return false;
+            }
+            if (stream.ReadUInt16() != 0x5a4d)
+            {
+                return false;
+            }
+            if (!stream.Advance(58))
+            {
+                return false;
+            }
+            if (!stream.MoveTo(stream.ReadUInt32()))
+            {
+                return false;
+            }
+            if (stream.ReadUInt32() != 0x00004550)
+            {
+                return false;
+            }
+            if (!stream.Advance(20))
+            {
+                return false;
+            }
+            if (!stream.Advance(stream.ReadUInt16() == 0x20b ? 222 : 206))
+            {
+                return false;
+            }
+
+            return stream.ReadUInt32() != 0;
+        }
+    }
+}
+

skip non .net references