X-Git-Url: http://git.efficios.com/?p=babeltrace.git;a=blobdiff_plain;f=formats%2Fctf%2Fiterator.c;h=6f8eb88a9de7b769817de518a1abf56db9e7f115;hp=d1152fcaf86852e418d09efed280ae611606adf3;hb=5f07b6ce3098d87af3d413a67dacb5e85b2bcafe;hpb=024e61817685a20caceb4e3ef3bdc019a7af6b6e

diff --git a/formats/ctf/iterator.c b/formats/ctf/iterator.c
index d1152fca..6f8eb88a 100644
--- a/formats/ctf/iterator.c
+++ b/formats/ctf/iterator.c
@@ -63,6 +63,41 @@ struct bt_ctf_iter *bt_ctf_iter_create(struct bt_context *ctx,
 	return iter;
 }
 
+struct bt_ctf_iter *bt_ctf_iter_create_intersect(struct bt_context *ctx,
+		struct bt_iter_pos **inter_begin_pos,
+		struct bt_iter_pos **inter_end_pos)
+{
+	uint64_t begin = 0, end = ULLONG_MAX;
+	int ret;
+
+	ret = ctf_find_packets_intersection(ctx, &begin, &end);
+	if (ret == 1) {
+		fprintf(stderr, "[error] No intersection found between trace files.\n");
+		goto error;
+	} else if (ret != 0) {
+		goto error;
+	}
+	*inter_begin_pos = bt_iter_create_time_pos(NULL, begin);
+	if (!(*inter_begin_pos)) {
+		goto error;
+	}
+	*inter_end_pos = bt_iter_create_time_pos(NULL, end);
+	if (!(*inter_end_pos)) {
+		goto error;
+	}
+
+	/*
+	 * bt_ctf_iter does not take ownership of begin and end positions,
+	 * so we return them to the caller who must still assume their ownership
+	 * until the iterator is destroyed.
+	 */
+	return bt_ctf_iter_create(ctx, *inter_begin_pos,
+			*inter_end_pos);
+error:
+	return NULL;
+}
+
+
 void bt_ctf_iter_destroy(struct bt_ctf_iter *iter)
 {
 	struct bt_stream_callbacks *bt_stream_cb;
@@ -119,12 +154,30 @@ struct bt_ctf_event *bt_ctf_iter_read_event_flags(struct bt_ctf_iter *iter,
 	 */
 	assert(iter);
 
+	if (flags)
+		*flags = 0;
+
 	ret = &iter->current_ctf_event;
 	file_stream = bt_heap_maximum(iter->parent.stream_heap);
 	if (!file_stream) {
 		/* end of file for all streams */
 		goto stop;
 	}
+
+	/*
+	 * If the packet is empty (contains only headers or is of size 0), the
+	 * caller has to know that we can't read the current event and we need
+	 * to do a bt_iter_next.
+	 */
+	if (file_stream->pos.data_offset == file_stream->pos.content_size
+			|| file_stream->pos.content_size == 0) {
+		/* More events may come. */
+		ret = NULL;
+		if (flags)
+			*flags |= BT_ITER_FLAG_RETRY;
+		goto end;
+	}
+
 	stream = &file_stream->parent;
 	if (iter->parent.end_pos &&
 		iter->parent.end_pos->type == BT_SEEK_TIME &&
@@ -134,12 +187,10 @@ struct bt_ctf_event *bt_ctf_iter_read_event_flags(struct bt_ctf_iter *iter,
 	ret->parent = g_ptr_array_index(stream->events_by_id,
 			stream->event_id);
 
-	if (flags)
-		*flags = 0;
-	if (!file_stream->pos.packet_cycles_index)
+	if (!file_stream->pos.packet_index)
 		packet_index = NULL;
 	else
-		packet_index = &g_array_index(file_stream->pos.packet_cycles_index,
+		packet_index = &g_array_index(file_stream->pos.packet_index,
 				struct packet_index, file_stream->pos.cur_index);
 	iter->events_lost = 0;
 	if (packet_index && packet_index->events_discarded >