[babeltrace.git] / plugins / utils / trimmer / iterator.c

/*
 * iterator.c
 *
 * Babeltrace Trace Trimmer Iterator
 *
 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "trimmer.h"
#include "iterator.h"
#include <babeltrace/component/notification/iterator.h>
#include <babeltrace/component/notification/notification.h>
#include <babeltrace/component/notification/event.h>
#include <babeltrace/component/notification/stream.h>
#include <babeltrace/component/notification/packet.h>
#include <babeltrace/component/component-filter.h>
#include <babeltrace/component/port.h>
#include <babeltrace/component/connection.h>
#include <babeltrace/ctf-ir/event.h>
#include <babeltrace/ctf-ir/stream.h>
#include <babeltrace/ctf-ir/stream-class.h>
#include <babeltrace/ctf-ir/clock-class.h>
#include <babeltrace/ctf-ir/packet.h>
#include <babeltrace/ctf-ir/trace.h>
#include <babeltrace/ctf-ir/fields.h>
#include <assert.h>
#include <plugins-common.h>

BT_HIDDEN
void trimmer_iterator_destroy(struct bt_notification_iterator *it)
{
	struct trimmer_iterator *it_data;

	it_data = bt_notification_iterator_get_private_data(it);
	assert(it_data);

	bt_put(it_data->current_notification);
	bt_put(it_data->input_iterator);
	g_free(it_data);
}

BT_HIDDEN
enum bt_notification_iterator_status trimmer_iterator_init(
		struct bt_component *component,
		struct bt_notification_iterator *iterator,
		UNUSED_VAR void *init_method_data)
{
	enum bt_notification_iterator_status ret =
		BT_NOTIFICATION_ITERATOR_STATUS_OK;
	enum bt_notification_iterator_status it_ret;
	struct bt_port *input_port = NULL;
	struct bt_connection *connection = NULL;
	struct trimmer_iterator *it_data = g_new0(struct trimmer_iterator, 1);

	if (!it_data) {
		ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
		goto end;
	}

	/* Create a new iterator on the upstream component. */
	input_port = bt_component_filter_get_default_input_port(component);
	assert(input_port);
	connection = bt_port_get_connection(input_port, 0);
	assert(connection);

	it_data->input_iterator = bt_connection_create_notification_iterator(
			connection);
	if (!it_data->input_iterator) {
		ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
		goto end;
	}

	it_ret = bt_notification_iterator_set_private_data(iterator, it_data);
	if (it_ret) {
		goto end;
	}
end:
	bt_put(connection);
	bt_put(input_port);
	return ret;
}

BT_HIDDEN
struct bt_notification *trimmer_iterator_get(
		struct bt_notification_iterator *iterator)
{
	struct trimmer_iterator *trim_it;

	trim_it = bt_notification_iterator_get_private_data(iterator);
	assert(trim_it);

	if (!trim_it->current_notification) {
		enum bt_notification_iterator_status it_ret;

		it_ret = trimmer_iterator_next(iterator);
		if (it_ret) {
			goto end;
		}
	}
end:
	return bt_get(trim_it->current_notification);
}

static
int update_lazy_bound(struct trimmer_bound *bound, const char *name,
		int64_t ts, bool *lazy_update)
{
	struct tm tm;
	int64_t value;
	time_t timeval;

	*lazy_update = false;

	if (!bound->lazy) {
		return 0;
	}
	tm.tm_isdst = -1;
	timeval = ts / NSEC_PER_SEC;

	if (bound->lazy_values.gmt) {
		/* Get day, month, year. */
		if (!gmtime_r(&timeval, &tm)) {
			printf_error("Failure in gmtime_r()");
			goto error;
		}
		tm.tm_sec = bound->lazy_values.ss;
		tm.tm_min = bound->lazy_values.mm;
		tm.tm_hour = bound->lazy_values.hh;
		timeval = timegm(&tm);
		if (timeval < 0) {
			printf_error("Failure in timegm(), incorrectly formatted %s timestamp",
					name);
			goto error;
		}
	} else {
		/* Get day, month, year. */
		if (!localtime_r(&timeval, &tm)) {
			printf_error("Failure in localtime_r()");
			goto error;
		}
		tm.tm_sec = bound->lazy_values.ss;
		tm.tm_min = bound->lazy_values.mm;
		tm.tm_hour = bound->lazy_values.hh;
		timeval = mktime(&tm);
		if (timeval < 0) {
			printf_error("Failure in mktime(), incorrectly formatted %s timestamp",
				name);
			goto error;
		}
	}
	value = (int64_t) timeval;
	value *= NSEC_PER_SEC;
	value += bound->lazy_values.ns;
	bound->value = value;
	bound->set = true;
	bound->lazy = false;
	*lazy_update = true;
	return 0;

error:
	return -1;
}

static
enum bt_notification_iterator_status
evaluate_event_notification(struct bt_notification *notification,
		struct trimmer_bound *begin, struct trimmer_bound *end,
		bool *_event_in_range)
{
	int64_t ts;
	int clock_ret;
	struct bt_ctf_event *event = NULL;
	bool in_range = true;
	struct bt_ctf_clock_class *clock_class = NULL;
	struct bt_ctf_trace *trace = NULL;
	struct bt_ctf_stream *stream = NULL;
	struct bt_ctf_stream_class *stream_class = NULL;
	struct bt_ctf_clock_value *clock_value = NULL;
	enum bt_notification_iterator_status ret =
			BT_NOTIFICATION_ITERATOR_STATUS_OK;
	bool lazy_update = false;

	event = bt_notification_event_get_event(notification);
	assert(event);

	stream = bt_ctf_event_get_stream(event);
	assert(stream);

	stream_class = bt_ctf_stream_get_class(stream);
	assert(stream_class);

	trace = bt_ctf_stream_class_get_trace(stream_class);
	assert(trace);

	/* FIXME multi-clock? */
	clock_class = bt_ctf_trace_get_clock_class(trace, 0);
	if (!clock_class) {
		goto end;
	}

	clock_value = bt_ctf_event_get_clock_value(event, clock_class);
	if (!clock_value) {
		printf_error("Failed to retrieve clock value");
		ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
		goto end;
	}

	clock_ret = bt_ctf_clock_value_get_value_ns_from_epoch(
			clock_value, &ts);
	if (clock_ret) {
		printf_error("Failed to retrieve clock value timestamp");
		ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
		goto end;
	}
	if (update_lazy_bound(begin, "begin", ts, &lazy_update)) {
		ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
		goto end;
	}
	if (update_lazy_bound(end, "end", ts, &lazy_update)) {
		ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
		goto end;
	}
	if (lazy_update && begin->set && end->set) {
		if (begin->value > end->value) {
			printf_error("Unexpected: time range begin value is above end value");
			ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
			goto end;
		}
	}
	if (begin->set && ts < begin->value) {
		in_range = false;
	}
	if (end->set && ts > end->value) {
		in_range = false;
	}
end:
	bt_put(event);
	bt_put(clock_class);
	bt_put(trace);
	bt_put(stream);
	bt_put(stream_class);
	bt_put(clock_value);
	*_event_in_range = in_range;
	return ret;
}

static
int ns_from_integer_field(struct bt_ctf_field *integer, int64_t *ns)
{
	int ret = 0;
	int is_signed;
	uint64_t raw_clock_value;
	struct bt_ctf_field_type *integer_type = NULL;
	struct bt_ctf_clock_class *clock_class = NULL;
	struct bt_ctf_clock_value *clock_value = NULL;

	integer_type = bt_ctf_field_get_type(integer);
	assert(integer_type);
	clock_class = bt_ctf_field_type_integer_get_mapped_clock_class(
		integer_type);
	if (!clock_class) {
		ret = -1;
		goto end;
	}

	is_signed = bt_ctf_field_type_integer_get_signed(integer_type);
	if (!is_signed) {
		ret = bt_ctf_field_unsigned_integer_get_value(integer,
				&raw_clock_value);
		if (ret) {
			goto end;
		}
	} else {
		/* Signed clock values are unsupported. */
		goto end;
	}

	clock_value = bt_ctf_clock_value_create(clock_class, raw_clock_value);
        if (!clock_value) {
		goto end;
	}

	ret = bt_ctf_clock_value_get_value_ns_from_epoch(clock_value, ns);
end:
	bt_put(integer_type);
	bt_put(clock_class);
	bt_put(clock_value);
	return ret;
}

static
enum bt_notification_iterator_status evaluate_packet_notification(
		struct bt_notification *notification,
		struct trimmer_bound *begin, struct trimmer_bound *end,
		bool *_packet_in_range)
{
        enum bt_notification_iterator_status ret =
			BT_NOTIFICATION_ITERATOR_STATUS_OK;
	int64_t begin_ns, pkt_begin_ns, end_ns, pkt_end_ns;
	bool in_range = true;
	struct bt_ctf_packet *packet = NULL;
	struct bt_ctf_field *packet_context = NULL,
			*timestamp_begin = NULL,
			*timestamp_end = NULL;

        switch (bt_notification_get_type(notification)) {
	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
		packet = bt_notification_packet_begin_get_packet(notification);
		break;
	case BT_NOTIFICATION_TYPE_PACKET_END:
		packet = bt_notification_packet_end_get_packet(notification);
		break;
	default:
		break;
	}
	assert(packet);

	packet_context = bt_ctf_packet_get_context(packet);
	if (!packet_context) {
		goto end;
	}

	if (!bt_ctf_field_is_structure(packet_context)) {
		goto end;
	}

	timestamp_begin = bt_ctf_field_structure_get_field(
			packet_context, "timestamp_begin");
	if (!timestamp_begin || !bt_ctf_field_is_integer(timestamp_begin)) {
		goto end;
	}
	timestamp_end = bt_ctf_field_structure_get_field(
			packet_context, "timestamp_end");
	if (!timestamp_end || !bt_ctf_field_is_integer(timestamp_end)) {
		goto end;
	}

	if (ns_from_integer_field(timestamp_begin, &pkt_begin_ns)) {
		goto end;
	}
	if (ns_from_integer_field(timestamp_end, &pkt_end_ns)) {
		goto end;
	}

	begin_ns = begin->set ? begin->value : INT64_MIN;
	end_ns = end->set ? end->value : INT64_MAX;

	/*
	 * Accept if there is any overlap between the selected region and the
	 * packet.
	 */
	in_range = (pkt_end_ns >= begin_ns) && (pkt_begin_ns <= end_ns);
end:
	*_packet_in_range = in_range;
	bt_put(packet);
	bt_put(packet_context);
	bt_put(timestamp_begin);
	bt_put(timestamp_end);
	return ret;
}

/* Return true if the notification should be forwarded. */
static
enum bt_notification_iterator_status evaluate_notification(
		struct bt_notification *notification,
		struct trimmer_bound *begin, struct trimmer_bound *end,
		bool *in_range)
{
	enum bt_notification_type type;
	enum bt_notification_iterator_status ret =
			BT_NOTIFICATION_ITERATOR_STATUS_OK;

	*in_range = true;
	type = bt_notification_get_type(notification);
	switch (type) {
	case BT_NOTIFICATION_TYPE_EVENT:
	        ret = evaluate_event_notification(notification, begin,
				end, in_range);
		break;
	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
	case BT_NOTIFICATION_TYPE_PACKET_END:
	        ret = evaluate_packet_notification(notification, begin,
				end, in_range);
		break;
	default:
		/* Accept all other notifications. */
		break;
	}
	return ret;
}

BT_HIDDEN
enum bt_notification_iterator_status trimmer_iterator_next(
		struct bt_notification_iterator *iterator)
{
	struct trimmer_iterator *trim_it = NULL;
	struct bt_component *component = NULL;
	struct trimmer *trimmer = NULL;
	struct bt_notification_iterator *source_it = NULL;
	enum bt_notification_iterator_status ret =
			BT_NOTIFICATION_ITERATOR_STATUS_OK;
	bool notification_in_range = false;

	trim_it = bt_notification_iterator_get_private_data(iterator);
	assert(trim_it);

	component = bt_notification_iterator_get_component(iterator);
	assert(component);
	trimmer = bt_component_get_private_data(component);
	assert(trimmer);

	source_it = trim_it->input_iterator;
	assert(source_it);

	while (!notification_in_range) {
		struct bt_notification *notification;

		ret = bt_notification_iterator_next(source_it);
		if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
			goto end;
		}

		notification = bt_notification_iterator_get_notification(
			        source_it);
		if (!notification) {
			ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
			goto end;
		}

	        ret = evaluate_notification(notification,
				&trimmer->begin, &trimmer->end,
				&notification_in_range);
		if (notification_in_range) {
			BT_MOVE(trim_it->current_notification, notification);
		} else {
			bt_put(notification);
		}

		if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
			break;
		}
	}
end:
	bt_put(component);
	return ret;
}

BT_HIDDEN
enum bt_notification_iterator_status trimmer_iterator_seek_time(
		struct bt_notification_iterator *iterator, int64_t time)
{
	enum bt_notification_iterator_status ret;

	ret = BT_NOTIFICATION_ITERATOR_STATUS_OK;
end:
	return ret;
}
Commit	Line	Data
cab3f160 JG	1	/*
	2	* iterator.c
	3	*
	4	* Babeltrace Trace Trimmer Iterator
	5	*
	6	* Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
	7	*
	8	* Author: Jérémie Galarneau <jeremie.galarneau@efficios.com>
	9	*
	10	* Permission is hereby granted, free of charge, to any person obtaining a copy
	11	* of this software and associated documentation files (the "Software"), to deal
	12	* in the Software without restriction, including without limitation the rights
	13	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	14	* copies of the Software, and to permit persons to whom the Software is
	15	* furnished to do so, subject to the following conditions:
	16	*
	17	* The above copyright notice and this permission notice shall be included in
	18	* all copies or substantial portions of the Software.
	19	*
	20	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	21	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	23	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	24	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	25	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	26	* SOFTWARE.
	27	*/
	28
	29	#include "trimmer.h"
	30	#include "iterator.h"
33b34c43 PP	31	#include <babeltrace/component/notification/iterator.h>
	32	#include <babeltrace/component/notification/notification.h>
	33	#include <babeltrace/component/notification/event.h>
	34	#include <babeltrace/component/notification/stream.h>
	35	#include <babeltrace/component/notification/packet.h>
d71dcf2c	36	#include <babeltrace/component/component-filter.h>
7d55361f JG	37	#include <babeltrace/component/port.h>
7d55361f JG	38	#include <babeltrace/component/connection.h>
44d3cbf0 JG	39	#include <babeltrace/ctf-ir/event.h>
	40	#include <babeltrace/ctf-ir/stream.h>
	41	#include <babeltrace/ctf-ir/stream-class.h>
ac0c6bdd	42	#include <babeltrace/ctf-ir/clock-class.h>
44d3cbf0 JG	43	#include <babeltrace/ctf-ir/packet.h>
44d3cbf0 JG	44	#include <babeltrace/ctf-ir/trace.h>
72208f03	45	#include <babeltrace/ctf-ir/fields.h>
44d3cbf0	46	#include <assert.h>
8b0ce102	47	#include <plugins-common.h>
44d3cbf0	48
d3eb6e8f	49	BT_HIDDEN
44d3cbf0 JG	50	void trimmer_iterator_destroy(struct bt_notification_iterator *it)
	51	{
	52	struct trimmer_iterator *it_data;
	53
	54	it_data = bt_notification_iterator_get_private_data(it);
	55	assert(it_data);
	56
44d3cbf0	57	bt_put(it_data->current_notification);
99cdb69e	58	bt_put(it_data->input_iterator);
44d3cbf0 JG	59	g_free(it_data);
44d3cbf0 JG	60	}
cab3f160 JG	61
cab3f160 JG	62	BT_HIDDEN
d3eb6e8f PP	63	enum bt_notification_iterator_status trimmer_iterator_init(
d3eb6e8f PP	64	struct bt_component *component,
8b0ce102 PP	65	struct bt_notification_iterator *iterator,
8b0ce102 PP	66	UNUSED_VAR void *init_method_data)
cab3f160	67	{
d3eb6e8f PP	68	enum bt_notification_iterator_status ret =
d3eb6e8f PP	69	BT_NOTIFICATION_ITERATOR_STATUS_OK;
cab3f160	70	enum bt_notification_iterator_status it_ret;
99cdb69e JG	71	struct bt_port *input_port = NULL;
99cdb69e JG	72	struct bt_connection *connection = NULL;
44d3cbf0 JG	73	struct trimmer_iterator *it_data = g_new0(struct trimmer_iterator, 1);
	74
	75	if (!it_data) {
d3eb6e8f	76	ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
44d3cbf0 JG	77	goto end;
	78	}
	79
99cdb69e JG	80	/* Create a new iterator on the upstream component. */
	81	input_port = bt_component_filter_get_default_input_port(component);
	82	assert(input_port);
	83	connection = bt_port_get_connection(input_port, 0);
	84	assert(connection);
	85
	86	it_data->input_iterator = bt_connection_create_notification_iterator(
	87	connection);
	88	if (!it_data->input_iterator) {
	89	ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
	90	goto end;
	91	}
	92
44d3cbf0 JG	93	it_ret = bt_notification_iterator_set_private_data(iterator, it_data);
	94	if (it_ret) {
	95	goto end;
	96	}
cab3f160	97	end:
99cdb69e JG	98	bt_put(connection);
99cdb69e JG	99	bt_put(input_port);
cab3f160 JG	100	return ret;
	101	}
	102
	103	BT_HIDDEN
	104	struct bt_notification *trimmer_iterator_get(
	105	struct bt_notification_iterator *iterator)
	106	{
44d3cbf0 JG	107	struct trimmer_iterator *trim_it;
	108
	109	trim_it = bt_notification_iterator_get_private_data(iterator);
	110	assert(trim_it);
	111
	112	if (!trim_it->current_notification) {
	113	enum bt_notification_iterator_status it_ret;
	114
	115	it_ret = trimmer_iterator_next(iterator);
	116	if (it_ret) {
	117	goto end;
	118	}
	119	}
	120	end:
	121	return bt_get(trim_it->current_notification);
	122	}
	123
528debdf MD	124	static
528debdf MD	125	int update_lazy_bound(struct trimmer_bound bound, const char name,
55595636	126	int64_t ts, bool *lazy_update)
528debdf MD	127	{
	128	struct tm tm;
	129	int64_t value;
	130	time_t timeval;
	131
55595636 MD	132	*lazy_update = false;
55595636 MD	133
528debdf MD	134	if (!bound->lazy) {
	135	return 0;
	136	}
	137	tm.tm_isdst = -1;
	138	timeval = ts / NSEC_PER_SEC;
	139
	140	if (bound->lazy_values.gmt) {
	141	/* Get day, month, year. */
	142	if (!gmtime_r(&timeval, &tm)) {
55595636	143	printf_error("Failure in gmtime_r()");
528debdf MD	144	goto error;
	145	}
	146	tm.tm_sec = bound->lazy_values.ss;
	147	tm.tm_min = bound->lazy_values.mm;
	148	tm.tm_hour = bound->lazy_values.hh;
	149	timeval = timegm(&tm);
	150	if (timeval < 0) {
55595636 MD	151	printf_error("Failure in timegm(), incorrectly formatted %s timestamp",
55595636 MD	152	name);
528debdf MD	153	goto error;
	154	}
	155	} else {
	156	/* Get day, month, year. */
	157	if (!localtime_r(&timeval, &tm)) {
55595636	158	printf_error("Failure in localtime_r()");
528debdf MD	159	goto error;
	160	}
	161	tm.tm_sec = bound->lazy_values.ss;
	162	tm.tm_min = bound->lazy_values.mm;
	163	tm.tm_hour = bound->lazy_values.hh;
	164	timeval = mktime(&tm);
	165	if (timeval < 0) {
55595636	166	printf_error("Failure in mktime(), incorrectly formatted %s timestamp",
528debdf MD	167	name);
	168	goto error;
	169	}
	170	}
	171	value = (int64_t) timeval;
	172	value *= NSEC_PER_SEC;
	173	value += bound->lazy_values.ns;
	174	bound->value = value;
	175	bound->set = true;
	176	bound->lazy = false;
55595636	177	*lazy_update = true;
528debdf MD	178	return 0;
	179
	180	error:
528debdf MD	181	return -1;
	182	}
	183
44d3cbf0	184	static
55595636 MD	185	enum bt_notification_iterator_status
	186	evaluate_event_notification(struct bt_notification *notification,
	187	struct trimmer_bound begin, struct trimmer_bound end,
	188	bool *_event_in_range)
44d3cbf0	189	{
72208f03 JG	190	int64_t ts;
	191	int clock_ret;
	192	struct bt_ctf_event *event = NULL;
	193	bool in_range = true;
ac0c6bdd	194	struct bt_ctf_clock_class *clock_class = NULL;
72208f03	195	struct bt_ctf_trace *trace = NULL;
44d3cbf0	196	struct bt_ctf_stream *stream = NULL;
72208f03 JG	197	struct bt_ctf_stream_class *stream_class = NULL;
72208f03 JG	198	struct bt_ctf_clock_value *clock_value = NULL;
55595636 MD	199	enum bt_notification_iterator_status ret =
	200	BT_NOTIFICATION_ITERATOR_STATUS_OK;
	201	bool lazy_update = false;
44d3cbf0	202
72208f03 JG	203	event = bt_notification_event_get_event(notification);
72208f03 JG	204	assert(event);
44d3cbf0	205
72208f03 JG	206	stream = bt_ctf_event_get_stream(event);
72208f03 JG	207	assert(stream);
44d3cbf0	208
72208f03 JG	209	stream_class = bt_ctf_stream_get_class(stream);
	210	assert(stream_class);
	211
	212	trace = bt_ctf_stream_class_get_trace(stream_class);
	213	assert(trace);
	214
	215	/* FIXME multi-clock? */
ac0c6bdd PP	216	clock_class = bt_ctf_trace_get_clock_class(trace, 0);
ac0c6bdd PP	217	if (!clock_class) {
72208f03	218	goto end;
44d3cbf0	219	}
44d3cbf0	220
ac0c6bdd	221	clock_value = bt_ctf_event_get_clock_value(event, clock_class);
72208f03	222	if (!clock_value) {
55595636 MD	223	printf_error("Failed to retrieve clock value");
55595636 MD	224	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
72208f03	225	goto end;
44d3cbf0	226	}
72208f03 JG	227
	228	clock_ret = bt_ctf_clock_value_get_value_ns_from_epoch(
	229	clock_value, &ts);
	230	if (clock_ret) {
55595636 MD	231	printf_error("Failed to retrieve clock value timestamp");
55595636 MD	232	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
44d3cbf0 JG	233	goto end;
44d3cbf0 JG	234	}
55595636 MD	235	if (update_lazy_bound(begin, "begin", ts, &lazy_update)) {
55595636 MD	236	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
528debdf MD	237	goto end;
528debdf MD	238	}
55595636 MD	239	if (update_lazy_bound(end, "end", ts, &lazy_update)) {
55595636 MD	240	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
528debdf MD	241	goto end;
528debdf MD	242	}
55595636 MD	243	if (lazy_update && begin->set && end->set) {
	244	if (begin->value > end->value) {
	245	printf_error("Unexpected: time range begin value is above end value");
	246	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
	247	goto end;
	248	}
	249	}
72208f03 JG	250	if (begin->set && ts < begin->value) {
	251	in_range = false;
	252	}
	253	if (end->set && ts > end->value) {
	254	in_range = false;
	255	}
44d3cbf0	256	end:
72208f03	257	bt_put(event);
ac0c6bdd	258	bt_put(clock_class);
72208f03 JG	259	bt_put(trace);
	260	bt_put(stream);
	261	bt_put(stream_class);
	262	bt_put(clock_value);
55595636 MD	263	*_event_in_range = in_range;
55595636 MD	264	return ret;
44d3cbf0 JG	265	}
44d3cbf0 JG	266
44d3cbf0	267	static
72208f03	268	int ns_from_integer_field(struct bt_ctf_field integer, int64_t ns)
44d3cbf0	269	{
72208f03 JG	270	int ret = 0;
	271	int is_signed;
	272	uint64_t raw_clock_value;
	273	struct bt_ctf_field_type *integer_type = NULL;
ac0c6bdd	274	struct bt_ctf_clock_class *clock_class = NULL;
44d3cbf0 JG	275	struct bt_ctf_clock_value *clock_value = NULL;
44d3cbf0 JG	276
72208f03 JG	277	integer_type = bt_ctf_field_get_type(integer);
72208f03 JG	278	assert(integer_type);
ac0c6bdd PP	279	clock_class = bt_ctf_field_type_integer_get_mapped_clock_class(
	280	integer_type);
	281	if (!clock_class) {
72208f03	282	ret = -1;
44d3cbf0 JG	283	goto end;
	284	}
	285
72208f03 JG	286	is_signed = bt_ctf_field_type_integer_get_signed(integer_type);
	287	if (!is_signed) {
	288	ret = bt_ctf_field_unsigned_integer_get_value(integer,
	289	&raw_clock_value);
	290	if (ret) {
44d3cbf0 JG	291	goto end;
44d3cbf0 JG	292	}
72208f03 JG	293	} else {
	294	/* Signed clock values are unsupported. */
	295	goto end;
	296	}
44d3cbf0	297
ac0c6bdd	298	clock_value = bt_ctf_clock_value_create(clock_class, raw_clock_value);
72208f03 JG	299	if (!clock_value) {
	300	goto end;
	301	}
44d3cbf0	302
72208f03 JG	303	ret = bt_ctf_clock_value_get_value_ns_from_epoch(clock_value, ns);
	304	end:
	305	bt_put(integer_type);
ac0c6bdd	306	bt_put(clock_class);
72208f03 JG	307	bt_put(clock_value);
	308	return ret;
	309	}
44d3cbf0	310
72208f03	311	static
55595636 MD	312	enum bt_notification_iterator_status evaluate_packet_notification(
	313	struct bt_notification *notification,
	314	struct trimmer_bound begin, struct trimmer_bound end,
	315	bool *_packet_in_range)
72208f03	316	{
55595636 MD	317	enum bt_notification_iterator_status ret =
55595636 MD	318	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03 JG	319	int64_t begin_ns, pkt_begin_ns, end_ns, pkt_end_ns;
	320	bool in_range = true;
	321	struct bt_ctf_packet *packet = NULL;
	322	struct bt_ctf_field *packet_context = NULL,
	323	*timestamp_begin = NULL,
	324	*timestamp_end = NULL;
	325
	326	switch (bt_notification_get_type(notification)) {
	327	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
	328	packet = bt_notification_packet_begin_get_packet(notification);
44d3cbf0	329	break;
72208f03 JG	330	case BT_NOTIFICATION_TYPE_PACKET_END:
	331	packet = bt_notification_packet_end_get_packet(notification);
	332	break;
	333	default:
55595636	334	break;
44d3cbf0	335	}
72208f03 JG	336	assert(packet);
	337
	338	packet_context = bt_ctf_packet_get_context(packet);
	339	if (!packet_context) {
	340	goto end;
	341	}
	342
	343	if (!bt_ctf_field_is_structure(packet_context)) {
	344	goto end;
	345	}
	346
	347	timestamp_begin = bt_ctf_field_structure_get_field(
	348	packet_context, "timestamp_begin");
	349	if (!timestamp_begin \|\| !bt_ctf_field_is_integer(timestamp_begin)) {
	350	goto end;
	351	}
	352	timestamp_end = bt_ctf_field_structure_get_field(
	353	packet_context, "timestamp_end");
	354	if (!timestamp_end \|\| !bt_ctf_field_is_integer(timestamp_end)) {
	355	goto end;
	356	}
	357
55595636	358	if (ns_from_integer_field(timestamp_begin, &pkt_begin_ns)) {
72208f03 JG	359	goto end;
72208f03 JG	360	}
55595636	361	if (ns_from_integer_field(timestamp_end, &pkt_end_ns)) {
72208f03 JG	362	goto end;
	363	}
	364
	365	begin_ns = begin->set ? begin->value : INT64_MIN;
	366	end_ns = end->set ? end->value : INT64_MAX;
	367
	368	/*
	369	* Accept if there is any overlap between the selected region and the
	370	* packet.
	371	*/
	372	in_range = (pkt_end_ns >= begin_ns) && (pkt_begin_ns <= end_ns);
	373	end:
55595636	374	*_packet_in_range = in_range;
72208f03 JG	375	bt_put(packet);
	376	bt_put(packet_context);
	377	bt_put(timestamp_begin);
	378	bt_put(timestamp_end);
55595636	379	return ret;
72208f03 JG	380	}
	381
	382	/* Return true if the notification should be forwarded. */
	383	static
55595636 MD	384	enum bt_notification_iterator_status evaluate_notification(
	385	struct bt_notification *notification,
	386	struct trimmer_bound begin, struct trimmer_bound end,
	387	bool *in_range)
72208f03	388	{
72208f03	389	enum bt_notification_type type;
55595636 MD	390	enum bt_notification_iterator_status ret =
55595636 MD	391	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03	392
b61397c4	393	*in_range = true;
72208f03 JG	394	type = bt_notification_get_type(notification);
	395	switch (type) {
	396	case BT_NOTIFICATION_TYPE_EVENT:
55595636 MD	397	ret = evaluate_event_notification(notification, begin,
55595636 MD	398	end, in_range);
72208f03 JG	399	break;
	400	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
	401	case BT_NOTIFICATION_TYPE_PACKET_END:
55595636 MD	402	ret = evaluate_packet_notification(notification, begin,
55595636 MD	403	end, in_range);
72208f03	404	break;
44d3cbf0	405	default:
72208f03	406	/* Accept all other notifications. */
44d3cbf0 JG	407	break;
44d3cbf0 JG	408	}
55595636	409	return ret;
cab3f160 JG	410	}
	411
	412	BT_HIDDEN
	413	enum bt_notification_iterator_status trimmer_iterator_next(
	414	struct bt_notification_iterator *iterator)
	415	{
44d3cbf0 JG	416	struct trimmer_iterator *trim_it = NULL;
	417	struct bt_component *component = NULL;
	418	struct trimmer *trimmer = NULL;
	419	struct bt_notification_iterator *source_it = NULL;
	420	enum bt_notification_iterator_status ret =
55595636	421	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03	422	bool notification_in_range = false;
cab3f160	423
44d3cbf0 JG	424	trim_it = bt_notification_iterator_get_private_data(iterator);
	425	assert(trim_it);
	426
	427	component = bt_notification_iterator_get_component(iterator);
	428	assert(component);
	429	trimmer = bt_component_get_private_data(component);
	430	assert(trimmer);
	431
99cdb69e JG	432	source_it = trim_it->input_iterator;
99cdb69e JG	433	assert(source_it);
44d3cbf0	434
72208f03	435	while (!notification_in_range) {
44d3cbf0 JG	436	struct bt_notification *notification;
	437
	438	ret = bt_notification_iterator_next(source_it);
	439	if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
	440	goto end;
	441	}
	442
	443	notification = bt_notification_iterator_get_notification(
	444	source_it);
	445	if (!notification) {
	446	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
	447	goto end;
	448	}
	449
55595636 MD	450	ret = evaluate_notification(notification,
	451	&trimmer->begin, &trimmer->end,
	452	&notification_in_range);
72208f03	453	if (notification_in_range) {
44d3cbf0 JG	454	BT_MOVE(trim_it->current_notification, notification);
	455	} else {
	456	bt_put(notification);
	457	}
6d5f6792 JG	458
	459	if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
	460	break;
	461	}
44d3cbf0	462	}
cab3f160	463	end:
44d3cbf0	464	bt_put(component);
cab3f160 JG	465	return ret;
	466	}
	467
	468	BT_HIDDEN
	469	enum bt_notification_iterator_status trimmer_iterator_seek_time(
	470	struct bt_notification_iterator *iterator, int64_t time)
	471	{
	472	enum bt_notification_iterator_status ret;
	473
	474	ret = BT_NOTIFICATION_ITERATOR_STATUS_OK;
	475	end:
	476	return ret;
	477	}