lua_getmetatable[-0, +(0|1), –] int lua_getmetatable (lua_State *L, int index); If the value at the given index has a metatable, the function pushes that metatable onto the stack and returns 1. Otherwise, the function returns 0 and pushes nothing on the stack.

lua_getlocal[-0, +(0|1), –] const char *lua_getlocal (lua_State *L, const lua_Debug *ar, int n); Gets information about a local variable of a given activation record or a given function. In the first case, the parameter ar must be a valid activation record that was filled by a previous call to lua_getstack or given as argument to a hook (see lua_Hook). The index n selects which local variable to inspect; see debug.getlocal for details about variable indices and names. lua_getlocal pushes

lua_getinfo[-(0|1), +(0|1|2), e] int lua_getinfo (lua_State *L, const char *what, lua_Debug *ar); Gets information about a specific function or function invocation. To get information about a function invocation, the parameter ar must be a valid activation record that was filled by a previous call to lua_getstack or given as argument to a hook (see lua_Hook). To get information about a function you push it onto the stack and start the what string with the character '>'. (In that case,

lua_geti[-0, +1, e] int lua_geti (lua_State *L, int index, lua_Integer i); Pushes onto the stack the value t[i], where t is the value at the given index. As in Lua, this function may trigger a metamethod for the "index" event (see §2.4). Returns the type of the pushed value.

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

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

lua_gethook[-0, +0, –] lua_Hook lua_gethook (lua_State *L); Returns the current hook function.

lua_getglobal[-0, +1, e] int lua_getglobal (lua_State *L, const char *name); Pushes onto the stack the value of the global name. Returns the type of that value.

lua_getfield[-0, +1, e] int lua_getfield (lua_State *L, int index, const char *k); Pushes onto the stack the value t[k], where t is the value at the given index. As in Lua, this function may trigger a metamethod for the "index" event (see §2.4). Returns the type of the pushed value.

lua_getextraspace[-0, +0, –] void *lua_getextraspace (lua_State *L); Returns a pointer to a raw memory area associated with the given Lua state. The application can use this area for any purpose; Lua does not use it for anything. Each new thread has this area initialized with a copy of the area of the main thread. By default, this area has the size of a pointer to void, but you can recompile Lua with a different size for this area. (See LUA_EXTRASPACE in luaconf.h.)