[Openais] xml api round two

[Steven Dake]

Here is round two of the xml api from discussions that happened on irc
today.

If you have further comments please direct them towards the list.

Thanks
-steve

/*
 * External API exported in a library api
 */
typedef uint64_t dataconf_handle_t;
typedef uint64_t dataconf_query_handle_t;

typedef enum {
	DATACONF_DISPATCH_ONE,
	DATACONF_DISPATCH_ALL,
	DATACONF_DISPATCH_BLOCKING
} dataconf_dispatch_t;

#define	DATACONF_TRACK_CURRENT		0x01
#define	DATACONF_TRACK_CHANGES		0x02
#define DATACONF_TRACk_CHANGES_ONLY	0x04

typedef void (*dataconf_new_result_fn_t) (
	dataconf_handle_t handle,
	unsigned int seqno,
	char *result);

typedef void (*dataconf_done_result_fn_t) (
	dataconf_handle_t handle,
	unsigned int seqno);

typedef struct {
	dataconf_new_result_fn_t dataconf_new_result_fn_t,
	dataconf_done_result_fn_t dataconf_done_result_fn
} dataconf_callbacks_t;

dataconf_error_t dataconf_initialize (
	dataconf_handle_t *handle,
	dataconf_callbacks_t *callbacks);

dataconf_error_t dataconf_finalize (
	dataconf_handle_t handle);

dataconf_error_t dataconf_fd_get (
	dataconf_handle_t *handle,
	int *fd);

dataconf_error_t dataconf_dispatch (
	dataconf_handle_t handle,
	dataconf_handle_T dispatch_types);

/*
 * Starts the delivery of callbacks for the xml query specified.
 * All callbacks are deliverd via the dispatch function
 * Depending on track flags, the current values of the xml query could be
 * delivered in this callback
 */
dataconf_error_t dataconf_track (
	dataconf_handle_t dataconf_handle,
	char *xml_request,
	int track_flags);

dataconf_error_t dataconf_trackstop (
	dataconf_handle_t dataconf_handle);

/*
 * Retrieves data syncronously
 */
dataconf_error_t dataconf_query_initialize (
	dataconf_handle_t dataconf_handle,
	dataconf_iterator_handle_t *dataconf_query_handle);

dataconf_error_t dataconf_query_next (
	dataconf_iterator_handle_t dataconf_query_handle,
	char *result);

dataconf_error_t dataconf_query_finalize (
	dataconf_iterator_handle_t dataconf_query_handle);

/*
 * Internal implementation API used inside the executive
 */
typdef uint64t xml_handle_t;

xml_initialize (xml_handle_t *handle);
xml_track_set (xml_handle_t handle,
	char *request,
	void (*new_result_fn_t) (
		unsigned int seqno,
		char *result),
	void (*done_result_fn_t) (
		unsigned int seqno),
	unsigned int track_flags);
xml_finalize (xml_handle_t handle);

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