[babeltrace.git] / plugins / 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/plugin/notification/iterator.h>
#include <babeltrace/plugin/notification/notification.h>
#include <babeltrace/plugin/notification/event.h>
#include <babeltrace/plugin/notification/stream.h>
#include <babeltrace/plugin/notification/packet.h>
#include <babeltrace/plugin/filter.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.h>
#include <babeltrace/ctf-ir/packet.h>
#include <babeltrace/ctf-ir/trace.h>
#include <babeltrace/ctf-ir/fields.h>
#include <assert.h>

static
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);

	if (it_data->input_iterator_group) {
		g_ptr_array_free(it_data->input_iterator_group, TRUE);
	}
	bt_put(it_data->current_notification);
	g_free(it_data);
}

BT_HIDDEN
enum bt_component_status trimmer_iterator_init(struct bt_component *component,
		struct bt_notification_iterator *iterator)
{
	enum bt_component_status ret = BT_COMPONENT_STATUS_OK;
	enum bt_notification_iterator_status it_ret;
	struct trimmer_iterator *it_data = g_new0(struct trimmer_iterator, 1);

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

	/* FIXME init trimmer_iterator */
	it_ret = bt_notification_iterator_set_private_data(iterator, it_data);
	if (it_ret) {
		goto end;
	}

	it_ret = bt_notification_iterator_set_destroy_cb(iterator,
		        trimmer_iterator_destroy);
	if (it_ret) {
		ret = BT_COMPONENT_STATUS_ERROR;
		goto end;
	}

	it_ret = bt_notification_iterator_set_next_cb(iterator,
			trimmer_iterator_next);
	if (it_ret) {
		ret = BT_COMPONENT_STATUS_ERROR;
		goto end;
	}

	it_ret = bt_notification_iterator_set_get_cb(iterator,
			trimmer_iterator_get);
	if (it_ret) {
		ret = BT_COMPONENT_STATUS_ERROR;
		goto end;
	}

	it_ret = bt_notification_iterator_set_seek_time_cb(iterator,
			trimmer_iterator_seek_time);
	if (it_ret) {
		ret = BT_COMPONENT_STATUS_ERROR;
		goto end;
	}
end:
	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)
{
	struct tm tm;
	int64_t value;
	time_t timeval;

	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()\n");
			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\n",
				name);
			goto error;
		}
	} else {
		/* Get day, month, year. */
		if (!localtime_r(&timeval, &tm)) {
			printf_error("Failure in localtime_r()\n");
			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\n",
				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;
	return 0;

error:
	bound->lazy = false;
	return -1;
}

static
bool evaluate_event_notification(struct bt_notification *notification,
		struct trimmer_bound *begin, struct trimmer_bound *end)
{
	int64_t ts;
	int clock_ret;
	struct bt_ctf_event *event = NULL;
	bool in_range = true;
	struct bt_ctf_clock *clock = 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;

	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 = bt_ctf_trace_get_clock(trace, 0);
	if (!clock) {
		goto end;
	}

	clock_value = bt_ctf_event_get_clock_value(event, clock);
	if (!clock_value) {
		printf_error("Failed to retrieve clock value\n");
		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\n");
		goto end;
	}
	if (update_lazy_bound(begin, "begin", ts)) {
		goto end;
	}
	if (update_lazy_bound(end, "end", ts)) {
		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);
	bt_put(trace);
	bt_put(stream);
	bt_put(stream_class);
	bt_put(clock_value);
	return in_range;
}

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 *clock = NULL;
	struct bt_ctf_clock_value *clock_value = NULL;

	integer_type = bt_ctf_field_get_type(integer);
	assert(integer_type);
	clock = bt_ctf_field_type_integer_get_mapped_clock(integer_type);
	if (!clock) {
		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, 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);
	bt_put(clock_value);
	return ret;
}

static
bool evaluate_packet_notification(struct bt_notification *notification,
		struct trimmer_bound *begin, struct trimmer_bound *end)
{
	int ret;
	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:
		abort();
	}
	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;
	}

	ret = ns_from_integer_field(timestamp_begin, &pkt_begin_ns);
	if (ret) {
		goto end;
	}
	ret = ns_from_integer_field(timestamp_end, &pkt_end_ns);
	if (ret) {
		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:
	bt_put(packet);
	bt_put(packet_context);
	bt_put(timestamp_begin);
	bt_put(timestamp_end);
	return in_range;
}

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

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

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;;
	enum bt_component_status component_ret;
	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);

	/* FIXME, should handle input iterator groups. */
	component_ret = bt_component_filter_get_input_iterator(component, 0,
			&source_it);
	assert((component_ret == BT_COMPONENT_STATUS_OK) && 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;
		}

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