Moved submodules to directories.

Aaru.Helpers/CountBits.cs

@@ -0,0 +1,49 @@
+// /***************************************************************************
+// Aaru Data Preservation Suite
+// ----------------------------------------------------------------------------
+//
+// Filename       : CountBits.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Helpers.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Counts bits in a number.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2023 Natalia Portillo
+// ****************************************************************************/
+
+namespace Aaru.Helpers
+{
+    /// <summary>Helper operations to count bits</summary>
+    public static class CountBits
+    {
+        /// <summary>Counts the number of bits set to <c>true</c> in a number</summary>
+        /// <param name="number">Number</param>
+        /// <returns>Bits set to <c>true</c></returns>
+        public static int Count(uint number)
+        {
+            number -= (number >> 1) & 0x55555555;
+            number =  (number & 0x33333333) + ((number >> 2) & 0x33333333);
+
+            return (int)((((number + (number >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24);
+        }
+    }
+}