void fw_fill_response()

in core-transaction.c [670:725]
49 lines of code
7 McCabe index (conditional complexity)

void fw_fill_response(struct fw_packet *response, u32 *request_header,
		      int rcode, void *payload, size_t length)
{
	int tcode, tlabel, extended_tcode, source, destination;

	tcode          = HEADER_GET_TCODE(request_header[0]);
	tlabel         = HEADER_GET_TLABEL(request_header[0]);
	source         = HEADER_GET_DESTINATION(request_header[0]);
	destination    = HEADER_GET_SOURCE(request_header[1]);
	extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);

	response->header[0] =
		HEADER_RETRY(RETRY_1) |
		HEADER_TLABEL(tlabel) |
		HEADER_DESTINATION(destination);
	response->header[1] =
		HEADER_SOURCE(source) |
		HEADER_RCODE(rcode);
	response->header[2] = 0;

	switch (tcode) {
	case TCODE_WRITE_QUADLET_REQUEST:
	case TCODE_WRITE_BLOCK_REQUEST:
		response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
		response->header_length = 12;
		response->payload_length = 0;
		break;

	case TCODE_READ_QUADLET_REQUEST:
		response->header[0] |=
			HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
		if (payload != NULL)
			response->header[3] = *(u32 *)payload;
		else
			response->header[3] = 0;
		response->header_length = 16;
		response->payload_length = 0;
		break;

	case TCODE_READ_BLOCK_REQUEST:
	case TCODE_LOCK_REQUEST:
		response->header[0] |= HEADER_TCODE(tcode + 2);
		response->header[3] =
			HEADER_DATA_LENGTH(length) |
			HEADER_EXTENDED_TCODE(extended_tcode);
		response->header_length = 16;
		response->payload = payload;
		response->payload_length = length;
		break;

	default:
		WARN(1, "wrong tcode %d\n", tcode);
	}

	response->payload_mapped = false;
}