C++ (Cpp) bt_ctf_field_array_get_field Examples

Example #1

File: writer.c Project: cooljeanius/babeltrace

static
int init_trace_packet_header(struct bt_ctf_writer *writer)
{
	size_t i;
	int ret = 0;
	struct bt_ctf_field *trace_packet_header = NULL,
		*magic = NULL, *uuid_array = NULL;
	struct bt_ctf_field_type *_uint32_t =
		get_field_type(FIELD_TYPE_ALIAS_UINT32_T);
	struct bt_ctf_field_type *_uint8_t =
		get_field_type(FIELD_TYPE_ALIAS_UINT8_T);
	struct bt_ctf_field_type *trace_packet_header_type =
		bt_ctf_field_type_structure_create();
	struct bt_ctf_field_type *uuid_array_type =
		bt_ctf_field_type_array_create(_uint8_t, 16);

	if (!trace_packet_header_type || !uuid_array_type) {
		ret = -1;
		goto end;
	}

	ret = bt_ctf_field_type_set_byte_order(_uint32_t,
		(writer->byte_order == LITTLE_ENDIAN ?
		BT_CTF_BYTE_ORDER_LITTLE_ENDIAN :
		BT_CTF_BYTE_ORDER_BIG_ENDIAN));
	if (ret) {
		goto end;
	}

	ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type,
		_uint32_t, "magic");
	if (ret) {
		goto end;
	}

	ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type,
		uuid_array_type, "uuid");
	if (ret) {
		goto end;
	}

	ret = bt_ctf_field_type_structure_add_field(trace_packet_header_type,
		_uint32_t, "stream_id");
	if (ret) {
		goto end;
	}

	trace_packet_header = bt_ctf_field_create(trace_packet_header_type);
	if (!trace_packet_header) {
		ret = -1;
		goto end;
	}

	magic = bt_ctf_field_structure_get_field(trace_packet_header, "magic");
	ret = bt_ctf_field_unsigned_integer_set_value(magic, 0xC1FC1FC1);
	if (ret) {
		goto end;
	}

	uuid_array = bt_ctf_field_structure_get_field(trace_packet_header,
		"uuid");
	for (i = 0; i < 16; i++) {
		struct bt_ctf_field *uuid_element =
			bt_ctf_field_array_get_field(uuid_array, i);
		ret = bt_ctf_field_unsigned_integer_set_value(uuid_element,
			writer->uuid[i]);
		bt_ctf_field_put(uuid_element);
		if (ret) {
			goto end;
		}
	}

	bt_ctf_field_type_put(writer->trace_packet_header_type);
	bt_ctf_field_put(writer->trace_packet_header);
	writer->trace_packet_header_type = trace_packet_header_type;
	writer->trace_packet_header = trace_packet_header;
end:
	bt_ctf_field_type_put(uuid_array_type);
	bt_ctf_field_type_put(_uint32_t);
	bt_ctf_field_type_put(_uint8_t);
	bt_ctf_field_put(magic);
	bt_ctf_field_put(uuid_array);
	if (ret) {
		bt_ctf_field_type_put(trace_packet_header_type);
		bt_ctf_field_put(trace_packet_header);
	}

	return ret;
}

Example #2

File: stream.c Project: brianrob/babeltrace

static
int set_packet_header_uuid(struct bt_ctf_stream *stream)
{
	int i, ret = 0;
	struct bt_ctf_field_type *uuid_field_type = NULL;
	struct bt_ctf_field_type *element_field_type = NULL;
	struct bt_ctf_field *uuid_field = bt_ctf_field_structure_get_field(
		stream->packet_header, "uuid");

	if (!uuid_field) {
		/* No uuid field found. Not an error, skip. */
		goto end;
	}

	if (!bt_ctf_field_validate(uuid_field)) {
		/* Value already set. Not an error, skip. */
		goto end;
	}

	uuid_field_type = bt_ctf_field_get_type(uuid_field);
	assert(uuid_field_type);
	if (bt_ctf_field_type_get_type_id(uuid_field_type) !=
		CTF_TYPE_ARRAY) {
		/* UUID field is not an array. Not an error, skip. */
		goto end;
	}

	if (bt_ctf_field_type_array_get_length(uuid_field_type) != 16) {
		/*
		 * UUID field is not of the expected size.
		 * Not an error, skip.
		 */
		goto end;
	}

	element_field_type = bt_ctf_field_type_array_get_element_type(
		uuid_field_type);
	assert(element_field_type);
	if (bt_ctf_field_type_get_type_id(element_field_type) !=
		CTF_TYPE_INTEGER) {
		/* UUID array elements are not integers. Not an error, skip */
		goto end;
	}

	for (i = 0; i < 16; i++) {
		struct bt_ctf_field *uuid_element =
			bt_ctf_field_array_get_field(uuid_field, i);

		ret = bt_ctf_field_type_integer_get_signed(element_field_type);
		assert(ret >= 0);

		if (ret) {
			ret = bt_ctf_field_signed_integer_set_value(
				uuid_element, (int64_t) stream->trace->uuid[i]);
		} else {
			ret = bt_ctf_field_unsigned_integer_set_value(
				uuid_element,
				(uint64_t) stream->trace->uuid[i]);
		}
		bt_put(uuid_element);
		if (ret) {
			goto end;
		}
	}

end:
	bt_put(uuid_field);
	bt_put(uuid_field_type);
	bt_put(element_field_type);
	return ret;
}