DESCRIPTION
The function set_field_opts sets all the given field’s option bits (field option bits may be logically-OR’ed together). The function field_opts_on turns on the given option bits, and leaves others alone.
The function field_opts_off turns off the given option bits, and leaves others alone.
The function field_opts returns the field’s current option bits.
The following options are defined (all are on by default):
