history: Initializing History and State Management

 
 2.3.1 Initializing History and State Management
 -----------------------------------------------
 
 This section describes functions used to initialize and manage the state
 of the History library when you want to use the history functions in
 your program.
 
  -- Function: void using_history (void)
      Begin a session in which the history functions might be used.  This
      initializes the interactive variables.
 
  -- Function: HISTORY_STATE * history_get_history_state (void)
      Return a structure describing the current state of the input
      history.
 
  -- Function: void history_set_history_state (HISTORY_STATE *state)
      Set the state of the history list according to STATE.