menu_driver - command processor for the menus subsystem
cc [ flag... ] file... –lmenu–lcurses [ library... ]
int menu_driver(MENU *menu, int c);
menu_driver() is the workhorse of the menus subsystem. It checks to determine whether the character c is a menu request or data. If c is a request, the menu driver executes the request and reports the result.
If c is data (a printable ASCII character), it enters the data into the pattern buffer and tries to find a matching item. If no match is found, the menu driver deletes the character from the pattern buffer and returns E_NO_MATCH.
If the character is not recognized, the menu driver assumes it is an application-defined command and returns E_UNKNOWN_COMMAND.
Menu driver requests:
Move left to an item.
Move right to an item
Move up to an item.
Move down to an item.
Scroll up a line.
Scroll down a line.
Scroll up a page.
Scroll down a page.
Move to the first item.
Move to the last item.
Move to the next item.
Move to the previous item.
Select/de-select an item.
Clear the menu pattern buffer.
Delete the previous character from pattern buffer.
Move the next matching item.
Move to the previous matching item.
menu_driver() returns one of the following:
The routine returned successfully.
An incorrect argument was passed to the routine.
The routine was called from an initialization or termination function.