Re: lib.sys.listdir Re: C Function returning a table to LUA?

[Asko Kauppi <asko.kauppi@...>]

The difference is that gluax hides the table writing into just two 
lines:

        glua_pushTable();
			...
	        glua_setTable_str_i( ++n, name );

whereas the regular Lua stack handling needs these:

        lua_newtable(L);
			...
            lua_pushnumber(L, ++i);
            lua_pushstring(L, entry->d_name);
            lua_settable(L, -3);

(the setting of 'n' can be ignored)



PINELLI Thierry SGAP Marseille kirjoittaa maanantaina, 29. syyskuuta 
2003, kello 17:32:

> Le Mon, Sep 29, 2003 at 05:11:24PM +0300, you write :
>
>
> > Both LuaCheia and GluaX provide the kind of service you mention, and 
> > it
> > works for Linux, Win32 and OS X. From gluax 'sys_module.c' (returns a
> > table using gluax macros):
>
> [...]
>
> >     struct dirent* entry;
> >         dir= opendir( path );
> >             while( (entry= readdir(dir)) != NULL )
>
> >         closedir( dir );
>
> Look at lposlib.c you can read :
>
> What's the difference ?
>
>
> static int pos_dir (lua_State *L)
> {
>     DIR *d = NULL;
>
>     switch (lua_type(L, 1))
>     {
>         case LUA_TNONE:
>         d=opendir(".");
>         break;
>
>         case LUA_TSTRING:
>         d=opendir(lua_tostring(L, 1));
>         break;
>
>         default:
>         lua_error(L, "optional argument to function Dir must be 
> string");
>     }
>     if (d == NULL)
>     {
>         return pos_pusherr(L);
>     }
>     else
>     {
>         int i = 0;
>         struct dirent *entry;
>         lua_newtable(L);
>         while ((entry = readdir(d)) != NULL)
>         {
>             lua_pushnumber(L, ++i);
>             lua_pushstring(L, entry->d_name);
>             lua_settable(L, -3);
>         }
>         closedir(d);
>         lua_pushstring(L, "n");
>         lua_pushnumber(L, i);
>         lua_settable(L, -3);
>
>         return 1;
>     }
> }