+
+struct definition_array *_bt_python_get_array_from_def(
+ struct bt_definition *field)
+{
+ const struct bt_declaration *array_decl;
+ struct definition_array *array = NULL;
+
+ if (!field) {
+ goto end;
+ }
+
+ array_decl = bt_ctf_get_decl_from_def(field);
+ if (bt_ctf_field_type(array_decl) == CTF_TYPE_ARRAY) {
+ array = container_of(field, struct definition_array, p);
+ }
+end:
+ return array;
+}
+
+struct bt_declaration *_bt_python_get_array_element_declaration(
+ struct bt_declaration *field)
+{
+ struct declaration_array *array_decl;
+ struct bt_declaration *ret = NULL;
+
+ if (!field) {
+ goto end;
+ }
+
+ array_decl = container_of(field, struct declaration_array, p);
+ ret = array_decl->elem;
+end:
+ return ret;
+}
+
+struct bt_declaration *_bt_python_get_sequence_element_declaration(
+ struct bt_declaration *field)
+{
+ struct declaration_sequence *sequence_decl;
+ struct bt_declaration *ret = NULL;
+
+ if (!field) {
+ goto end;
+ }
+
+ sequence_decl = container_of(field, struct declaration_sequence, p);
+ ret = sequence_decl->elem;
+end:
+ return ret;
+}
+
+const char *_bt_python_get_array_string(struct bt_definition *field)
+{
+ struct definition_array *array;
+ const char *ret = NULL;
+
+ if (!field) {
+ goto end;
+ }
+
+ array = container_of(field, struct definition_array, p);
+ ret = array->string->str;
+end:
+ return ret;
+}
+
+const char *_bt_python_get_sequence_string(struct bt_definition *field)
+{
+ struct definition_sequence *sequence;
+ const char *ret = NULL;
+
+ if (!field) {
+ goto end;
+ }
+
+ sequence = container_of(field, struct definition_sequence, p);
+ ret = sequence->string->str;
+end:
+ return ret;
+}
+
+struct definition_sequence *_bt_python_get_sequence_from_def(
+ struct bt_definition *field)
+{
+ if (field && bt_ctf_field_type(
+ bt_ctf_get_decl_from_def(field)) == CTF_TYPE_SEQUENCE) {
+ return container_of(field, struct definition_sequence, p);
+ }
+
+ return NULL;
+}
+
+int _bt_python_field_integer_get_signedness(const struct bt_ctf_field *field)
+{
+ int ret;
+
+ if (!field || field->type->declaration->id != CTF_TYPE_INTEGER) {
+ ret = -1;
+ goto end;
+ }
+
+ const struct bt_ctf_field_type_integer *type = container_of(field->type,
+ const struct bt_ctf_field_type_integer, parent);
+ ret = type->declaration.signedness;
+end:
+ return ret;
+}
+
+enum ctf_type_id _bt_python_get_field_type(const struct bt_ctf_field *field)
+{
+ enum ctf_type_id type_id = CTF_TYPE_UNKNOWN;
+
+ if (!field) {
+ goto end;
+ }
+
+ type_id = field->type->declaration->id;
+end:
+ return type_id;
+}
+
+/*
+ * Python 3.5 changes the StopIteration exception clearing behaviour which
+ * erroneously marks swig clean-up function as having failed. This explicit
+ * allocation function is intended as a work-around so SWIG doesn't manage
+ * the lifetime of a "temporary" object by itself.
+ */
+struct bt_iter_pos *_bt_python_create_iter_pos(void)
+{
+ return g_new0(struct bt_iter_pos, 1);
+}
+
+struct bt_ctf_iter *_bt_python_ctf_iter_create_intersect(
+ struct bt_context *ctx,
+ struct bt_iter_pos *inter_begin_pos,
+ struct bt_iter_pos *inter_end_pos)
+{
+ return bt_ctf_iter_create_intersect(ctx, &inter_begin_pos,
+ &inter_end_pos);
+}
+
+int _bt_python_has_intersection(struct bt_context *ctx)
+{
+ int ret;
+ uint64_t begin = 0, end = ULLONG_MAX;
+
+ ret = ctf_find_packets_intersection(ctx, &begin, &end);
+
+ return ret == 0 ? 1 : 0;
+}