RE: c args to lus?

["Kevin Baca" <lualist@...>]

lua_tonumber() is a C function.

The lua equivalent is tonumber().

>From lua your function call should look like:

local left, top, right, bottom = deskGetDesktopSize()
deskMainWndMove(200,200,500,500)

-Kevin

> -----Original Message-----
> From: lua-bounces@bazar2.conectiva.com.br 
> [mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of 
> mark greenlancer
> Sent: Thursday, August 12, 2004 12:05 AM
> To: Lua list
> Subject: Re: c args to lus?
> 
> 
> Kevin Baca wrote:
> 
> > <>No need to reset the stack.
> >
> > While it's always good to restrict stack growth, lua does 
> clean up the
> > stack after function calls.
> >
> > The return value 4 tells lua to take the 4 top-most stack 
> values as the
> > return values of the function, no matter how large the 
> stack has grown.
> 
> okay
> 
> > <>Not sure about the context surrounding lua_tonumber(this, 1).
> >
> > What is "this"? Where is the call made?
> 
> I also tried only lua_tonumber(1)
> 
> The complete error msg is
> "s_mainwnd.lua:5: attempt to call global `lua_tonumber' (a nil value)"
> 
> The lua source:
> 
> -- deskGetDesktopSize(a,b,c,d)
> deskGetDesktopSize()
> lua_tonumber(1)
> deskMainWndMove(200,200,500,500)
> 
> The c source
> 
> int deskLuaGetDesktopSize(lua_State *l)
> {
>     RECT rc;
> 
>     GetWindowRect(GetDesktopWindow(), &rc);
> 
>     //lua_settop(l, 0);
>     lua_pushnumber(l, rc.left);
>     lua_pushnumber(l, rc.top);
>     lua_pushnumber(l, rc.right);
>     lua_pushnumber(l, rc.bottom);
> 
>     return 4;
> }
> 
> mark
>