public static bool CheckType(IntPtr ptr, int p, out LuaDelegate f)
{
LuaState state = LuaState.Get(ptr);
p = LuaNativeMethods.lua_absindex(ptr, p);
LuaNativeMethods.luaL_checktype(ptr, p, LuaTypes.TYPE_FUNCTION);
LuaNativeMethods.lua_getglobal(ptr, DelgateTable);
LuaNativeMethods.lua_pushvalue(ptr, p);
LuaNativeMethods.lua_gettable(ptr, -2); // find function in __LuaDelegate table
if (LuaNativeMethods.lua_isnil(ptr, -1))
{ // not found
LuaNativeMethods.lua_pop(ptr, 1); // pop nil
f = NewDelegate(ptr, p);
}
else
{
int fref = LuaNativeMethods.lua_tointeger(ptr, -1);
LuaNativeMethods.lua_pop(ptr, 1); // pop ref value;
f = state.DelegateMap[fref];
if (f == null)
{
f = NewDelegate(ptr, p);
}
}
LuaNativeMethods.lua_pop(ptr, 1); // pop DelgateTable
return(true);
}
