[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/private-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/private-component-filter.h>
#include <babeltrace/component/private-port.h>
#include <babeltrace/component/private-connection.h>
#include <babeltrace/component/private-component.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_private_notification_iterator *it)
{
	struct trimmer_iterator *it_data;

	it_data = bt_private_notification_iterator_get_user_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_private_component *component,
		struct bt_private_port *port,
		struct bt_private_notification_iterator *iterator)
{
	enum bt_notification_iterator_status ret =
		BT_NOTIFICATION_ITERATOR_STATUS_OK;
	enum bt_notification_iterator_status it_ret;
	struct bt_private_port *input_port = NULL;
	struct bt_private_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_private_component_filter_get_default_input_private_port(
		component);
	assert(input_port);
	connection = bt_private_port_get_private_connection(input_port);
	assert(connection);

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

	it_ret = bt_private_notification_iterator_set_user_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_private_notification_iterator *iterator)
{
	struct trimmer_iterator *trim_it;

	trim_it = bt_private_notification_iterator_get_user_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_private_notification_iterator *iterator)
{
	struct trimmer_iterator *trim_it = NULL;
	struct bt_private_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_private_notification_iterator_get_user_data(iterator);
	assert(trim_it);

	component = bt_private_notification_iterator_get_private_component(
		iterator);
	assert(component);
	trimmer = bt_private_component_get_user_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_private_notification_iterator *iterator,
		int64_t time)
{
	return BT_NOTIFICATION_ITERATOR_STATUS_OK;
}
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	31	#include <babeltrace/component/notification/iterator.h>
890882ef	32	#include <babeltrace/component/notification/private-iterator.h>
33b34c43 PP	33	#include <babeltrace/component/notification/notification.h>
	34	#include <babeltrace/component/notification/event.h>
	35	#include <babeltrace/component/notification/stream.h>
	36	#include <babeltrace/component/notification/packet.h>
d71dcf2c	37	#include <babeltrace/component/component-filter.h>
890882ef PP	38	#include <babeltrace/component/private-component-filter.h>
	39	#include <babeltrace/component/private-port.h>
	40	#include <babeltrace/component/private-connection.h>
	41	#include <babeltrace/component/private-component.h>
44d3cbf0 JG	42	#include <babeltrace/ctf-ir/event.h>
	43	#include <babeltrace/ctf-ir/stream.h>
	44	#include <babeltrace/ctf-ir/stream-class.h>
ac0c6bdd	45	#include <babeltrace/ctf-ir/clock-class.h>
44d3cbf0 JG	46	#include <babeltrace/ctf-ir/packet.h>
44d3cbf0 JG	47	#include <babeltrace/ctf-ir/trace.h>
72208f03	48	#include <babeltrace/ctf-ir/fields.h>
44d3cbf0	49	#include <assert.h>
8b0ce102	50	#include <plugins-common.h>
44d3cbf0	51
d3eb6e8f	52	BT_HIDDEN
890882ef	53	void trimmer_iterator_destroy(struct bt_private_notification_iterator *it)
44d3cbf0 JG	54	{
	55	struct trimmer_iterator *it_data;
	56
890882ef	57	it_data = bt_private_notification_iterator_get_user_data(it);
44d3cbf0 JG	58	assert(it_data);
44d3cbf0 JG	59
44d3cbf0	60	bt_put(it_data->current_notification);
99cdb69e	61	bt_put(it_data->input_iterator);
44d3cbf0 JG	62	g_free(it_data);
44d3cbf0 JG	63	}
cab3f160 JG	64
cab3f160 JG	65	BT_HIDDEN
d3eb6e8f	66	enum bt_notification_iterator_status trimmer_iterator_init(
890882ef PP	67	struct bt_private_component *component,
	68	struct bt_private_port *port,
	69	struct bt_private_notification_iterator *iterator)
cab3f160	70	{
d3eb6e8f PP	71	enum bt_notification_iterator_status ret =
d3eb6e8f PP	72	BT_NOTIFICATION_ITERATOR_STATUS_OK;
cab3f160	73	enum bt_notification_iterator_status it_ret;
890882ef PP	74	struct bt_private_port *input_port = NULL;
890882ef PP	75	struct bt_private_connection *connection = NULL;
44d3cbf0 JG	76	struct trimmer_iterator *it_data = g_new0(struct trimmer_iterator, 1);
	77
	78	if (!it_data) {
d3eb6e8f	79	ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
44d3cbf0 JG	80	goto end;
	81	}
	82
99cdb69e	83	/* Create a new iterator on the upstream component. */
890882ef PP	84	input_port = bt_private_component_filter_get_default_input_private_port(
890882ef PP	85	component);
99cdb69e	86	assert(input_port);
890882ef	87	connection = bt_private_port_get_private_connection(input_port);
99cdb69e JG	88	assert(connection);
99cdb69e JG	89
890882ef PP	90	it_data->input_iterator =
890882ef PP	91	bt_private_connection_create_notification_iterator(connection);
99cdb69e JG	92	if (!it_data->input_iterator) {
	93	ret = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM;
	94	goto end;
	95	}
	96
890882ef PP	97	it_ret = bt_private_notification_iterator_set_user_data(iterator,
890882ef PP	98	it_data);
44d3cbf0 JG	99	if (it_ret) {
	100	goto end;
	101	}
cab3f160	102	end:
99cdb69e JG	103	bt_put(connection);
99cdb69e JG	104	bt_put(input_port);
cab3f160 JG	105	return ret;
	106	}
	107
	108	BT_HIDDEN
	109	struct bt_notification *trimmer_iterator_get(
890882ef	110	struct bt_private_notification_iterator *iterator)
cab3f160	111	{
44d3cbf0 JG	112	struct trimmer_iterator *trim_it;
44d3cbf0 JG	113
890882ef	114	trim_it = bt_private_notification_iterator_get_user_data(iterator);
44d3cbf0 JG	115	assert(trim_it);
	116
	117	if (!trim_it->current_notification) {
	118	enum bt_notification_iterator_status it_ret;
	119
	120	it_ret = trimmer_iterator_next(iterator);
	121	if (it_ret) {
	122	goto end;
	123	}
	124	}
	125	end:
	126	return bt_get(trim_it->current_notification);
	127	}
	128
528debdf MD	129	static
528debdf MD	130	int update_lazy_bound(struct trimmer_bound bound, const char name,
55595636	131	int64_t ts, bool *lazy_update)
528debdf MD	132	{
	133	struct tm tm;
	134	int64_t value;
	135	time_t timeval;
	136
55595636 MD	137	*lazy_update = false;
55595636 MD	138
528debdf MD	139	if (!bound->lazy) {
	140	return 0;
	141	}
	142	tm.tm_isdst = -1;
	143	timeval = ts / NSEC_PER_SEC;
	144
	145	if (bound->lazy_values.gmt) {
	146	/* Get day, month, year. */
	147	if (!gmtime_r(&timeval, &tm)) {
55595636	148	printf_error("Failure in gmtime_r()");
528debdf MD	149	goto error;
	150	}
	151	tm.tm_sec = bound->lazy_values.ss;
	152	tm.tm_min = bound->lazy_values.mm;
	153	tm.tm_hour = bound->lazy_values.hh;
	154	timeval = timegm(&tm);
	155	if (timeval < 0) {
55595636 MD	156	printf_error("Failure in timegm(), incorrectly formatted %s timestamp",
55595636 MD	157	name);
528debdf MD	158	goto error;
	159	}
	160	} else {
	161	/* Get day, month, year. */
	162	if (!localtime_r(&timeval, &tm)) {
55595636	163	printf_error("Failure in localtime_r()");
528debdf MD	164	goto error;
	165	}
	166	tm.tm_sec = bound->lazy_values.ss;
	167	tm.tm_min = bound->lazy_values.mm;
	168	tm.tm_hour = bound->lazy_values.hh;
	169	timeval = mktime(&tm);
	170	if (timeval < 0) {
55595636	171	printf_error("Failure in mktime(), incorrectly formatted %s timestamp",
528debdf MD	172	name);
	173	goto error;
	174	}
	175	}
	176	value = (int64_t) timeval;
	177	value *= NSEC_PER_SEC;
	178	value += bound->lazy_values.ns;
	179	bound->value = value;
	180	bound->set = true;
	181	bound->lazy = false;
55595636	182	*lazy_update = true;
528debdf MD	183	return 0;
	184
	185	error:
528debdf MD	186	return -1;
	187	}
	188
44d3cbf0	189	static
55595636 MD	190	enum bt_notification_iterator_status
	191	evaluate_event_notification(struct bt_notification *notification,
	192	struct trimmer_bound begin, struct trimmer_bound end,
	193	bool *_event_in_range)
44d3cbf0	194	{
72208f03 JG	195	int64_t ts;
	196	int clock_ret;
	197	struct bt_ctf_event *event = NULL;
	198	bool in_range = true;
ac0c6bdd	199	struct bt_ctf_clock_class *clock_class = NULL;
72208f03	200	struct bt_ctf_trace *trace = NULL;
44d3cbf0	201	struct bt_ctf_stream *stream = NULL;
72208f03 JG	202	struct bt_ctf_stream_class *stream_class = NULL;
72208f03 JG	203	struct bt_ctf_clock_value *clock_value = NULL;
55595636 MD	204	enum bt_notification_iterator_status ret =
	205	BT_NOTIFICATION_ITERATOR_STATUS_OK;
	206	bool lazy_update = false;
44d3cbf0	207
72208f03 JG	208	event = bt_notification_event_get_event(notification);
72208f03 JG	209	assert(event);
44d3cbf0	210
72208f03 JG	211	stream = bt_ctf_event_get_stream(event);
72208f03 JG	212	assert(stream);
44d3cbf0	213
72208f03 JG	214	stream_class = bt_ctf_stream_get_class(stream);
	215	assert(stream_class);
	216
	217	trace = bt_ctf_stream_class_get_trace(stream_class);
	218	assert(trace);
	219
	220	/* FIXME multi-clock? */
ac0c6bdd PP	221	clock_class = bt_ctf_trace_get_clock_class(trace, 0);
ac0c6bdd PP	222	if (!clock_class) {
72208f03	223	goto end;
44d3cbf0	224	}
44d3cbf0	225
ac0c6bdd	226	clock_value = bt_ctf_event_get_clock_value(event, clock_class);
72208f03	227	if (!clock_value) {
55595636 MD	228	printf_error("Failed to retrieve clock value");
55595636 MD	229	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
72208f03	230	goto end;
44d3cbf0	231	}
72208f03 JG	232
	233	clock_ret = bt_ctf_clock_value_get_value_ns_from_epoch(
	234	clock_value, &ts);
	235	if (clock_ret) {
55595636 MD	236	printf_error("Failed to retrieve clock value timestamp");
55595636 MD	237	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
44d3cbf0 JG	238	goto end;
44d3cbf0 JG	239	}
55595636 MD	240	if (update_lazy_bound(begin, "begin", ts, &lazy_update)) {
55595636 MD	241	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
528debdf MD	242	goto end;
528debdf MD	243	}
55595636 MD	244	if (update_lazy_bound(end, "end", ts, &lazy_update)) {
55595636 MD	245	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
528debdf MD	246	goto end;
528debdf MD	247	}
55595636 MD	248	if (lazy_update && begin->set && end->set) {
	249	if (begin->value > end->value) {
	250	printf_error("Unexpected: time range begin value is above end value");
	251	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
	252	goto end;
	253	}
	254	}
72208f03 JG	255	if (begin->set && ts < begin->value) {
	256	in_range = false;
	257	}
	258	if (end->set && ts > end->value) {
	259	in_range = false;
	260	}
44d3cbf0	261	end:
72208f03	262	bt_put(event);
ac0c6bdd	263	bt_put(clock_class);
72208f03 JG	264	bt_put(trace);
	265	bt_put(stream);
	266	bt_put(stream_class);
	267	bt_put(clock_value);
55595636 MD	268	*_event_in_range = in_range;
55595636 MD	269	return ret;
44d3cbf0 JG	270	}
44d3cbf0 JG	271
44d3cbf0	272	static
72208f03	273	int ns_from_integer_field(struct bt_ctf_field integer, int64_t ns)
44d3cbf0	274	{
72208f03 JG	275	int ret = 0;
	276	int is_signed;
	277	uint64_t raw_clock_value;
	278	struct bt_ctf_field_type *integer_type = NULL;
ac0c6bdd	279	struct bt_ctf_clock_class *clock_class = NULL;
44d3cbf0 JG	280	struct bt_ctf_clock_value *clock_value = NULL;
44d3cbf0 JG	281
72208f03 JG	282	integer_type = bt_ctf_field_get_type(integer);
72208f03 JG	283	assert(integer_type);
ac0c6bdd PP	284	clock_class = bt_ctf_field_type_integer_get_mapped_clock_class(
	285	integer_type);
	286	if (!clock_class) {
72208f03	287	ret = -1;
44d3cbf0 JG	288	goto end;
	289	}
	290
72208f03 JG	291	is_signed = bt_ctf_field_type_integer_get_signed(integer_type);
	292	if (!is_signed) {
	293	ret = bt_ctf_field_unsigned_integer_get_value(integer,
	294	&raw_clock_value);
	295	if (ret) {
44d3cbf0 JG	296	goto end;
44d3cbf0 JG	297	}
72208f03 JG	298	} else {
	299	/* Signed clock values are unsupported. */
	300	goto end;
	301	}
44d3cbf0	302
ac0c6bdd	303	clock_value = bt_ctf_clock_value_create(clock_class, raw_clock_value);
72208f03 JG	304	if (!clock_value) {
	305	goto end;
	306	}
44d3cbf0	307
72208f03 JG	308	ret = bt_ctf_clock_value_get_value_ns_from_epoch(clock_value, ns);
	309	end:
	310	bt_put(integer_type);
ac0c6bdd	311	bt_put(clock_class);
72208f03 JG	312	bt_put(clock_value);
	313	return ret;
	314	}
44d3cbf0	315
72208f03	316	static
55595636 MD	317	enum bt_notification_iterator_status evaluate_packet_notification(
	318	struct bt_notification *notification,
	319	struct trimmer_bound begin, struct trimmer_bound end,
	320	bool *_packet_in_range)
72208f03	321	{
55595636 MD	322	enum bt_notification_iterator_status ret =
55595636 MD	323	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03 JG	324	int64_t begin_ns, pkt_begin_ns, end_ns, pkt_end_ns;
	325	bool in_range = true;
	326	struct bt_ctf_packet *packet = NULL;
	327	struct bt_ctf_field *packet_context = NULL,
	328	*timestamp_begin = NULL,
	329	*timestamp_end = NULL;
	330
	331	switch (bt_notification_get_type(notification)) {
	332	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
	333	packet = bt_notification_packet_begin_get_packet(notification);
44d3cbf0	334	break;
72208f03 JG	335	case BT_NOTIFICATION_TYPE_PACKET_END:
	336	packet = bt_notification_packet_end_get_packet(notification);
	337	break;
	338	default:
55595636	339	break;
44d3cbf0	340	}
72208f03 JG	341	assert(packet);
	342
	343	packet_context = bt_ctf_packet_get_context(packet);
	344	if (!packet_context) {
	345	goto end;
	346	}
	347
	348	if (!bt_ctf_field_is_structure(packet_context)) {
	349	goto end;
	350	}
	351
	352	timestamp_begin = bt_ctf_field_structure_get_field(
	353	packet_context, "timestamp_begin");
	354	if (!timestamp_begin \|\| !bt_ctf_field_is_integer(timestamp_begin)) {
	355	goto end;
	356	}
	357	timestamp_end = bt_ctf_field_structure_get_field(
	358	packet_context, "timestamp_end");
	359	if (!timestamp_end \|\| !bt_ctf_field_is_integer(timestamp_end)) {
	360	goto end;
	361	}
	362
55595636	363	if (ns_from_integer_field(timestamp_begin, &pkt_begin_ns)) {
72208f03 JG	364	goto end;
72208f03 JG	365	}
55595636	366	if (ns_from_integer_field(timestamp_end, &pkt_end_ns)) {
72208f03 JG	367	goto end;
	368	}
	369
	370	begin_ns = begin->set ? begin->value : INT64_MIN;
	371	end_ns = end->set ? end->value : INT64_MAX;
	372
	373	/*
	374	* Accept if there is any overlap between the selected region and the
	375	* packet.
	376	*/
	377	in_range = (pkt_end_ns >= begin_ns) && (pkt_begin_ns <= end_ns);
	378	end:
55595636	379	*_packet_in_range = in_range;
72208f03 JG	380	bt_put(packet);
	381	bt_put(packet_context);
	382	bt_put(timestamp_begin);
	383	bt_put(timestamp_end);
55595636	384	return ret;
72208f03 JG	385	}
	386
	387	/* Return true if the notification should be forwarded. */
	388	static
55595636 MD	389	enum bt_notification_iterator_status evaluate_notification(
	390	struct bt_notification *notification,
	391	struct trimmer_bound begin, struct trimmer_bound end,
	392	bool *in_range)
72208f03	393	{
72208f03	394	enum bt_notification_type type;
55595636 MD	395	enum bt_notification_iterator_status ret =
55595636 MD	396	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03	397
b61397c4	398	*in_range = true;
72208f03 JG	399	type = bt_notification_get_type(notification);
	400	switch (type) {
	401	case BT_NOTIFICATION_TYPE_EVENT:
55595636 MD	402	ret = evaluate_event_notification(notification, begin,
55595636 MD	403	end, in_range);
72208f03 JG	404	break;
	405	case BT_NOTIFICATION_TYPE_PACKET_BEGIN:
	406	case BT_NOTIFICATION_TYPE_PACKET_END:
55595636 MD	407	ret = evaluate_packet_notification(notification, begin,
55595636 MD	408	end, in_range);
72208f03	409	break;
44d3cbf0	410	default:
72208f03	411	/* Accept all other notifications. */
44d3cbf0 JG	412	break;
44d3cbf0 JG	413	}
55595636	414	return ret;
cab3f160 JG	415	}
	416
	417	BT_HIDDEN
	418	enum bt_notification_iterator_status trimmer_iterator_next(
890882ef	419	struct bt_private_notification_iterator *iterator)
cab3f160	420	{
44d3cbf0	421	struct trimmer_iterator *trim_it = NULL;
890882ef	422	struct bt_private_component *component = NULL;
44d3cbf0 JG	423	struct trimmer *trimmer = NULL;
	424	struct bt_notification_iterator *source_it = NULL;
	425	enum bt_notification_iterator_status ret =
55595636	426	BT_NOTIFICATION_ITERATOR_STATUS_OK;
72208f03	427	bool notification_in_range = false;
cab3f160	428
890882ef	429	trim_it = bt_private_notification_iterator_get_user_data(iterator);
44d3cbf0 JG	430	assert(trim_it);
44d3cbf0 JG	431
890882ef PP	432	component = bt_private_notification_iterator_get_private_component(
890882ef PP	433	iterator);
44d3cbf0	434	assert(component);
890882ef	435	trimmer = bt_private_component_get_user_data(component);
44d3cbf0 JG	436	assert(trimmer);
44d3cbf0 JG	437
99cdb69e JG	438	source_it = trim_it->input_iterator;
99cdb69e JG	439	assert(source_it);
44d3cbf0	440
72208f03	441	while (!notification_in_range) {
44d3cbf0 JG	442	struct bt_notification *notification;
	443
	444	ret = bt_notification_iterator_next(source_it);
	445	if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
	446	goto end;
	447	}
	448
	449	notification = bt_notification_iterator_get_notification(
	450	source_it);
	451	if (!notification) {
	452	ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR;
	453	goto end;
	454	}
	455
55595636 MD	456	ret = evaluate_notification(notification,
	457	&trimmer->begin, &trimmer->end,
	458	&notification_in_range);
72208f03	459	if (notification_in_range) {
44d3cbf0 JG	460	BT_MOVE(trim_it->current_notification, notification);
	461	} else {
	462	bt_put(notification);
	463	}
6d5f6792 JG	464
	465	if (ret != BT_NOTIFICATION_ITERATOR_STATUS_OK) {
	466	break;
	467	}
44d3cbf0	468	}
cab3f160	469	end:
44d3cbf0	470	bt_put(component);
cab3f160 JG	471	return ret;
	472	}
	473
	474	BT_HIDDEN
	475	enum bt_notification_iterator_status trimmer_iterator_seek_time(
890882ef PP	476	struct bt_private_notification_iterator *iterator,
890882ef PP	477	int64_t time)
cab3f160	478	{
72b913fb	479	return BT_NOTIFICATION_ITERATOR_STATUS_OK;
cab3f160	480	}