Road to v1 begins!

NTwain/Platform.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace NTwain
+{
+    /// <summary>
+    /// Class for checking various platform requirements and conditions.
+    /// </summary>
+    public static class Platform
+    {
+        // Change pinvoke base on where running in 64bit mode.
+        // Theoretically [DllImport("twaindsm", EntryPoint = "#1")] 
+        // works on both 32 and 64 bit
+        // but it's not installed on either system by default.
+        // A proper 64 bit twain driver would've installed it so  
+        // in essence it only exists in 64 bit systems and thus
+        // the 2 sets of identical pinvokes for windows :(
+
+        static Platform()
+        {
+            IsApp64bit = IntPtr.Size == 8;
+            NewWinDsmExists = File.Exists(Path.Combine(Environment.SystemDirectory, "twaindsm.dll"));
+
+            UseNewDSM = IsApp64bit || NewWinDsmExists;
+
+            IsOnMono = Type.GetType("Mono.Runtime") != null;
+            IsWin = Environment.OSVersion.Platform == PlatformID.Win32NT;
+            IsLinux = Environment.OSVersion.Platform == PlatformID.Unix;
+        }
+
+        internal static readonly bool UseNewDSM;
+
+        internal static readonly bool IsApp64bit;
+        internal static readonly bool NewWinDsmExists;
+
+        internal static readonly bool IsOnMono;
+
+        internal static readonly bool IsWin;
+        internal static readonly bool IsLinux;
+
+        /// <summary>
+        /// Gets a value indicating whether this library is supported.
+        /// </summary>
+        /// <value>
+        /// <c>true</c> if this library is supported; otherwise, <c>false</c>.
+        /// </value>
+        public static bool IsSupported
+        {
+            get
+            {
+                if (IsWin)
+                {
+                    if (IsApp64bit) { return NewWinDsmExists; }
+                    return true;
+                }
+                return IsOnMono && IsLinux;
+            }
+        }
+
+
+        static readonly WinMemoryManager _defaultMemManager = new WinMemoryManager();
+        static IMemoryManager _specifiedMemManager = null;
+
+        /// <summary>
+        /// Gets the <see cref="IMemoryManager"/> for communicating with data sources.
+        /// </summary>
+        /// <value>
+        /// The memory manager.
+        /// </value>
+        public static IMemoryManager MemoryManager
+        {
+            get
+            {
+                if (_specifiedMemManager == null) { return _defaultMemManager; }
+                return _specifiedMemManager;
+            }
+            internal set
+            {
+                _specifiedMemManager = value;
+            }
+        }
+    }
+}