Bitwise operations in Lua

components/lua/luastate.cpp

@@ -51,7 +51,7 @@ namespace LuaUtil
 
     LuaState::LuaState(const VFS::Manager* vfs, const ScriptsConfiguration* conf) : mConf(conf), mVFS(vfs)
     {
-        mLua.open_libraries(sol::lib::base, sol::lib::coroutine, sol::lib::math,
+        mLua.open_libraries(sol::lib::base, sol::lib::coroutine, sol::lib::math, sol::lib::bit32,
                             sol::lib::string, sol::lib::table, sol::lib::os, sol::lib::debug);
 
         mLua["math"]["randomseed"](static_cast<unsigned>(std::time(nullptr)));

components/lua/utilpackage.cpp

@@ -216,6 +216,37 @@ namespace LuaUtil
         util["normalizeAngle"] = &Misc::normalizeAngle;
         util["makeReadOnly"] = &makeReadOnly;
 
+        if (lua["bit32"] != sol::nil)
+        {
+            sol::table bit = lua["bit32"];
+            util["bitOr"] = bit["bor"];
+            util["bitAnd"] = bit["band"];
+            util["bitXor"] = bit["bxor"];
+            util["bitNot"] = bit["bnot"];
+        }
+        else
+        {
+            util["bitOr"] = [](unsigned a, sol::variadic_args va)
+            {
+                for (auto v : va)
+                    a |= v.as<unsigned>();
+                return a;
+            };
+            util["bitAnd"] = [](unsigned a, sol::variadic_args va)
+            {
+                for (auto v : va)
+                    a &= v.as<unsigned>();
+                return a;
+            };
+            util["bitXor"] = [](unsigned a, sol::variadic_args va)
+            {
+                for (auto v : va)
+                    a ^= v.as<unsigned>();
+                return a;
+            };
+            util["bitNot"] = [](unsigned a) { return ~a; };
+        }
+
         return util;
     }
     

files/lua_api/openmw/util.lua

@@ -25,6 +25,33 @@
 -- @param #table table Any table.
 -- @return #table The same table wrapped with read only userdata.
 
+---
+-- Bitwise And (supports any number of arguments).
+-- @function [parent=#util] bitAnd
+-- @param #number A First argument (integer).
+-- @param #number B Second argument (integer).
+-- @return #number Bitwise And of A and B.
+
+---
+-- Bitwise Or (supports any number of arguments).
+-- @function [parent=#util] bitOr
+-- @param #number A First argument (integer).
+-- @param #number B Second argument (integer).
+-- @return #number Bitwise Or of A and B.
+
+---
+-- Bitwise Xor (supports any number of arguments).
+-- @function [parent=#util] bitXor
+-- @param #number A First argument (integer).
+-- @param #number B Second argument (integer).
+-- @return #number Bitwise Xor of A and B.
+
+---
+-- Bitwise inversion.
+-- @function [parent=#util] bitNot
+-- @param #number A Argument (integer).
+-- @return #number Bitwise Not of A.
+
 
 ---
 -- Immutable 2D vector