1  extern int protected_data_1a;
       2  extern int protected_data_1b;
       3  
       4  extern int *protected_data_1a_p ();
       5  extern int *protected_data_1b_p ();
       6  
       7  extern void set_protected_data_1a (int);
       8  extern void set_protected_data_1b (int);
       9  
      10  extern int check_protected_data_1a (int);
      11  extern int check_protected_data_1b (int);