1 files changed, 98 insertions, 0 deletions
diff --git a/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/BitPackage.cs b/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/BitPackage.cs
new file mode 100644
index 000000000..16483e661
--- /dev/null
+++ b/Emby.Server.Implementations/TextEncoding/UniversalDetector/Core/BitPackage.cs
@@ -0,0 +1,98 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Universal charset detector code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *          Kohei TAKETA <k-tak@void.in> (Java port)
+ *          Rudi Pettazzi <rudi.pettazzi@gmail.com> (C# port)
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+namespace UniversalDetector.Core
+{
+    public class BitPackage
+    {
+        public static int INDEX_SHIFT_4BITS  = 3;
+        public static int INDEX_SHIFT_8BITS  = 2;
+        public static int INDEX_SHIFT_16BITS = 1;
+        
+        public static int SHIFT_MASK_4BITS  = 7;
+        public static int SHIFT_MASK_8BITS  = 3;
+        public static int SHIFT_MASK_16BITS = 1;
+        
+        public static int BIT_SHIFT_4BITS  = 2;
+        public static int BIT_SHIFT_8BITS  = 3;
+        public static int BIT_SHIFT_16BITS = 4;
+        
+        public static int UNIT_MASK_4BITS  = 0x0000000F;
+        public static int UNIT_MASK_8BITS  = 0x000000FF;
+        public static int UNIT_MASK_16BITS = 0x0000FFFF;
+
+        private int indexShift;
+        private int shiftMask;
+        private int bitShift;
+        private int unitMask;
+        private int[] data;
+        
+        public BitPackage(int indexShift, int shiftMask,
+                int bitShift, int unitMask, int[] data)
+        {
+            this.indexShift = indexShift;
+            this.shiftMask = shiftMask;
+            this.bitShift = bitShift;
+            this.unitMask = unitMask;
+            this.data = data;
+        }
+        
+        public static int Pack16bits(int a, int b)
+        {
+            return ((b << 16) | a);
+        }
+        
+        public static int Pack8bits(int a, int b, int c, int d)
+        {
+            return Pack16bits((b << 8) | a, (d << 8) | c);
+        }
+        
+        public static int Pack4bits(int a, int b, int c, int d, 
+                                    int e, int f, int g, int h)
+        {
+            return Pack8bits((b << 4) | a, (d << 4) | c,
+                             (f << 4) | e, (h << 4) | g);
+        }
+        
+        public int Unpack(int i)
+        {
+            return (data[i >> indexShift] >> 
+                    ((i & shiftMask) << bitShift)) & unitMask;
+        }
+   }
+}