auparse_add_callback(auparse_state_t *au, auparse_callback_ptr callback,
void *user_data, user_destroy user_destroy_func);
DESCRIPTIONauparse_add_callback adds a callback function to the parse state which is invoked to notify the application of parsing events. This is part of the event feed API.
The signature of the callback is:
void auparse_callback(auparse_state_t *au, auparse_cb_event_t cb_event_type, void *user_data);
When the callback is invoked it is passed:
a pointer to the parse_state
- enumerated value indicating the reason why the callback was invoked
- pointer to user supplied private data. May be NULL.
pointer to function called when user_data is destroyed. May be NULL.
The signature is:
void destroy(void *user_data);
The destroy() function should be prepared to accept user_data possibly being NULL.
argument indicates why the callback was invoked. It's possible values are:
- A complete event has been parsed and is ready to be examined. This is logically equivalent to the parse state immediately following auparse_next_event()
See auparse_feed(3) for a complete code example.
Returns the previous callback pointer.