lua_Unsigned typedef ... lua_Unsigned; The unsigned version of

lua_gc[-0, +0, m] int lua_gc (lua_State *L, int what, int data); Controls the garbage collector

dofile ([filename])dofilestdindofiledofile

io.type (obj) Checks whether obj is a valid file handle. Returns the string "file" if obj is an open file handle, "closed file"

io.output ([file]) Similar to io.input, but operates

luaL_typename[-0, +0, –] const char *luaL_typename (lua_State *L, int index); Returns the name of the type

lua_gethookcount[-0, +0, –] int lua_gethookcount (lua_State *L); Returns the current hook count.

luaL_optnumber[-0, +0, v] lua_Number luaL_optnumber (lua_State *L, int arg, lua_Number d); If

debug.getuservalue (u) Returns the Lua value associated to u. If u is not a full userdata, returns nil.

utf8.codepoint (s [, i [, j]])sijiji