Re: [Wxlua-users] How to get lua function name while in C function

[John L. <jla...@gm...>]

On 4/12/06, Ray Gilbert <ray...@sc...> wrote:
> On the stack - the lua function calling c function
> 'static int LUACALL My_C_fn(lua_State *L)'

Take a look at the code in modules/wxluadebug/src/wxldebug.cpp

int wxLuaDebugData::EnumerateTable(const wxLuaState& wxlState_, int
tableRef, int nIndex, wxArrayInt& references)

switch (lua_type(L, -2))
  case LUA_TFUNCTION:
    if (lua_iscfunction(L, -2))
      name.Printf(wxT("%p"), lua_tocfunction(L, -2));
    else
      name.Printf(wxT("%p"), lua_topointer(L, -2));
    break;

----------------
You could do

lua_getglobal(L, "myfunction");
if (lua_isfunction(L, -1))
{
    lua_CFunction* fn =3D lua_tocfunction(L, -1);
    lua_pop(L, -1);
    if (fn)
        fn(L);  // I forget how to call a pointer fn?
}
else if (!lua_isnil(L, -1))
    lua_pop(-1);


-John Labenski

> -----Original Message-----
> From: wxl...@li...
> [mailto:wxl...@li...] On Behalf Of John
> Labenski
> Sent: Thursday, 13 April 2006 10:02
> To: wxl...@li...
> Subject: Re: [Wxlua-users] How to get lua function name while in C
> function
>
> On 4/12/06, Ray Gilbert <ray...@sc...> wrote:
> >
> > Has anyone got a sample of c code showing how to get lua function name
>
> Hi, I'm not sure I understand what you mean. A lua function that's on
> the stack or just see if the function exists at all?
>
> To see if it exists I think this should work
>
> lua_getglobal(L, "myfunction");
> lua_isfunction(L, -1)
>
> then to run it do
>
> lua_pcall(L, 0, LUA_MULTRET, 0);
>
> else pop it off the stack
>
> lua_pop(L, 1)
>
>
> -John Labenski
>
>
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