love.filesystem is now loaded by default in threads (see issue #1040.)

src/common/runtime.cpp

@@ -188,7 +188,7 @@ int luax_assert_nilerror(lua_State *L, int idx)
 
 void luax_setfuncs(lua_State *L, const luaL_Reg *l)
 {
-	if (l == 0)
+	if (l == nullptr)
 		return;
 
 	for (; l->name != nullptr; l++)
@@ -198,6 +198,14 @@ void luax_setfuncs(lua_State *L, const luaL_Reg *l)
 	}
 }
 
+int luax_require(lua_State *L, const char *name)
+{
+	lua_getglobal(L, "require");
+	lua_pushstring(L, name);
+	lua_call(L, 1, 1);
+	return 1;
+}
+
 int luax_register_module(lua_State *L, const WrappedModule &m)
 {
 	// Put a reference to the C++ module in Lua.
@@ -224,13 +232,15 @@ int luax_register_module(lua_State *L, const WrappedModule &m)
 	lua_newtable(L);
 
 	// Register all the functions.
-	if (m.functions != 0)
+	if (m.functions != nullptr)
 		luax_setfuncs(L, m.functions);
 
 	// Register types.
-	if (m.types != 0)
-		for (const lua_CFunction *t = m.types; *t != 0; t++)
+	if (m.types != nullptr)
+	{
+		for (const lua_CFunction *t = m.types; *t != nullptr; t++)
 			(*t)(L);
+	}
 
 	lua_pushvalue(L, -1);
 	lua_setfield(L, -3, m.name); // love.graphics = table

src/common/runtime.h

@@ -222,6 +222,13 @@ int luax_assert_nilerror(lua_State *L, int idx);
  **/
 void luax_setfuncs(lua_State *L, const luaL_Reg *l);
 
+/**
+ * Loads a Lua module using the 'require' function. Leaves the return result on
+ * the stack.
+ * @param name The name of the module to require.
+ **/
+int luax_require(lua_State *L, const char *name);
+
 /**
  * Register a module in the love table. The love table will be created if it does not exist.
  * NOTE: The module-object is expected to have a +1 reference count before calling