auparse_add_callback − add a callback handler for notifications
auparse_add_callback(auparse_state_t *au, auparse_callback_ptr callback,
void *user_data, user_destroy user_destroy_func);
auparse_add_callback adds a callback function to the parse state which is invoked to notify the application of parsing events.
The signature of the callback is:
auparse_callback(auparse_state_t *au, auparse_cb_event_t cb_event_type,
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.
cb_event_type 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.
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