heavy rework of our input system

- implement the InputController abstract class, an adapter class for any HID interface to use common controller methods relevant to Heaven Studio
- implement InputKeyboard and InputJoyshock classes, for keyboard input and controllers driven by JoyShockLibrary respectively
- add Linux compile of JoyShockLibrary

Assets/Scripts/Util/BitwiseUtils.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace HeavenStudio.Util
+{
+    public static class BitwiseUtils
+    {
+        /// <summary>
+        /// Returns the value of the lowest set bit in the given integer.
+        /// </summary>
+        /// <param name="num">The integer to check.</param>
+        public static int FirstSetBit(int num)
+        {
+            return num & (-num);
+        }
+
+        /// <summary>
+        /// Returns true if the wanted bit is set in the given integer.
+        /// </summary>
+        /// <param name="num">The integer to check.</param>
+        /// <param name="want">The bit(s) to check for.</param>
+        public static bool WantCurrent(int num, int want)
+        {
+            return (num & want) == want;
+        }
+
+        /// <summary>
+        /// Returns true if the wanted bit is set in the first integer, and not in the second.
+        /// </summary>
+        /// <param name="num1">The first integer to check.</param>
+        /// <param name="num2">The second integer to check.</param>
+        /// <param name="want">The bit(s) to check for.</param>
+        public static bool WantCurrentAndNotLast(int num1, int num2, int want)
+        {
+            return ((num1 & want) == want) && ((num2 & want) != want);
+        }
+
+        /// <summary>
+        /// Returns true if the wanted bit is not set in the first integer, but set in the second.
+        /// </summary>
+        /// <param name="num1">The first integer to check.</param>
+        /// <param name="num2">The second integer to check.</param>
+        /// <param name="want">The bit(s) to check for.</param>
+        public static bool WantNotCurrentAndLast(int num1, int num2, int want)
+        {
+            return ((num1 & want) != want) && ((num2 & want) == want);
+        }
+    }
+}

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