From 1a0e98b7ad7a41d0818fb32e32d8e31992bb560f Mon Sep 17 00:00:00 2001
From: pasky1382 <pasky1382@gmail.com>
Date: Sun, 19 Jan 2014 17:42:21 +0000
Subject: [PATCH] Lua bit.checkbit() function, returns if a specified bit is
 on/off.

---
 BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs
index 1fd615319b..f9ee97935d 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.Bit.cs
@@ -1,4 +1,5 @@
-namespace BizHawk.Client.Common
+using System;
+namespace BizHawk.Client.Common
 {
 	public class BitLuaLibrary : LuaLibraryBase
 	{
@@ -17,6 +18,7 @@
 					"rol",
 					"ror",
 					"rshift",
+					"check",
 				};
 			}
 		}
@@ -62,5 +64,11 @@
 		{
 			return (uint)(LuaInt(val) >> LuaInt(amt));
 		}
+
+		public static bool bit_check(object num, object pos)
+		{
+			var value = Convert.ToInt64(LuaLong(num));
+			return (value & (1 << (int)(LuaInt(pos)))) != 0;
+		}
 	}
 }