#4 could be as innocent as: /* Returns a bitwise-OR'ed number showing all the possible places you can save to */ int get_available_save_location

#4 could be as innocent as: /* Returns a bitwise-OR'ed number showing all the possible places you can save to */ int get_available_save_locations(); [...] int save_locations = get_available_save_locations(); if (save_locations != SAVELOC_NVRAM) { goto FATAL_ERROR; }