newbie: problems in reading table from lua

[Alexander Miro <amiro@...>]

Hi everyone,

I've been trying to read a table/array from lua in a C++ program without
success... I just want to get users list from a file like this:
------------------> BEGIN: users.db
	Entry{
		login = "lostuser"
	}
	Entry{
		login = "ohmygod"
	}
------------------< END: users.db

So, I created one function to do this task:

------------------> BEGIN: myFunctions.lua
	function GetUsersList ()
	    local loginList = {}  -- I tried without keyword `local' too
	    function Entry (b) -- See "Programming in Lua - Chapter 12"
	           loginList[b.login] = true
	    end
	    dofile("users.db")
	    for name in pairs(loginList) do print(name) end
	    return loginList
	end
------------------< END: myFunctions.lua

The output is correct:
	ohmygod
	lostuser

Bellow is what I'm trying to do in C++ to read the
values returned from the lua function:

//////////////////////// BEGIN: C++ snippet
    lua_getglobal(m_pLuaState, "GetUsersList");
    int result = lua_pcall(m_pLuaState, 0, 1, 0);
    if (! lua_istable(m_pLuaState, 1)) {
	// error ... bla bla bla
        return false;
    }
    // the next function will return 0 (zero).
    // It should return 2 (two).... WHY NOT???
    int n = (int) luaL_getn(m_pLuaState, 1);   

    // Thus it is impossible to start the next loop!
    for (int i = 1; i <= n; i++) {
         // I don't know if the next 2 rows will work,
         // HOW IS THE RIGHT WAY TO GET THE VALUES ???
         lua_rawgeti(m_pLuaState, 1, i);
         cout << (const char*) lua_tostring(m_pLuaState, -1) << endl;
    }
//////////////////////// END: C++ snippet

Does anyone could help me?
Thanks
   
Alexander Miro
Rio de Janeiro - Brazil

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