tickit_ctlname() returns the name of the given toplevel instance control. These names are the lowercase
strings given in tickit(7).
tickit_lookup_ctl() returns the control constant for a given name. If the name is not recognised then -1
is returned.
tickit_ctltype() returns the type of the given instance control, as one of the following constants:
TICKIT_TYPE_BOOL
The value is an integer representing a simple boolean choice, where any nonzero value is true. Use
tickit_setctl_int(3) and tickit_getctl_int(3).
TICKIT_TYPE_INT
The value is an integer representing a quantity, or a value in some particular enumeration. Use
tickit_setctl_int(3) and tickit_getctl_int(3).
For unrecognised control types, the function returns 0.