keymap (Keymap map)
     Return a new keymap which is a copy of MAP.

 -- Function: Keymap rl_make_keymap (void)
     Return a new keymap with the printing characters bound to
     rl_insert, the lowercase Meta characters bound to run their
     equivalents, and the Meta digits bound to produce numeric
     arguments.

 -- Function: void rl_discard_keymap (Keymap keymap)
     Free the storage associated with the data in KEYMAP.  The caller
     should free KEYMAP.

 -- Function: void rl_free_keymap (Keymap keymap)
     Free all storage associated with KEYMAP.  This calls
     'rl_discard_keymap' to free subordindate keymaps and macros.

 -- Function: int rl_empty_keymap (Keymap keymap)
     Return non-zero if there are no keys bound to functions in KEYMAP;
     zero if there are any keys bound.

   Readline has several internal keymaps.  These functions allow you to
change which keymap is active.

 -- Function: Keymap rl_get_keymap (void)
     Returns the currently active keymap.

 -- Function: void rl_set_keymap (Keymap keymap)
     Makes KEYMAP the currently active keymap.

 -- Function: Keymap rl_get_keymap_by_name (const char *name)
     Return the keymap matching NAME.  NAME is one which would be
     supplied in a 'set keymap' inputrc line (*note Readline Init
     File::).

 -- Function: char * rl_get_keymap_name (Keymap keymap)
     Return the name matching KEYMAP.  NAME is one which would be
     supplied in a 'set keymap' inputrc line (*note Readline Init
     File::).

 -- Function: int rl_set_keymap_name (const char *name, Keymap keymap)
     Set the name of KEYMAP.  This name will then be "registered" and
     available for use in a 'set keymap' inputrc directive *note
     Readline Init File::).  The NAME may not be one of Readline's
     builtin keymap names; you may not add a different name for one of
     Readline's builtin keymaps.  You may replace the name associated
     with a given keymap by calling this function more than once with
     the same KEYMAP argument.  You may associate a registered NAME with
     a new keymap by calling this function more than once with the same
     NAME argument.  There is no way to remove a named keymap once the
     name has been registered.  Readline will make a copy of NAME.  The
     return value is greater than zero unless NAME is one of Readline's
     builtin keymap names or KEYMAP is one of Readline's builtin
     keymaps.