azure / azure-umqtt-c - Conditional Complexity

Intro

Conditional complexity (also called cyclomatic complexity) is a term used to measure the complexity of software. The term refers to the number of possible paths through a program function. A higher value ofter means higher maintenance and testing costs (infosecinstitute.com).
Conditional complexity is calculated by counting all conditions in the program that can affect the execution path (e.g. if statement, loops, switches, and/or operators, try and catch blocks...).
Conditional complexity is measured at the unit level (methods, functions...).
Units are classified in four categories based on the measured McCabe index: 1-5 (simple units), 6-10 (medium complex units), 11-25 (complex units), 26+ (very complex units).

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Conditional Complexity Overall

There are 78 units with 2,390 lines of code in units (72.3% of code).

0 very complex units (0 lines of code)
3 complex units (461 lines of code)
6 medium complex units (451 lines of code)
20 simple units (802 lines of code)
49 very simple units (676 lines of code)

Legend:

51+

26-50

11-25

6-10

1-5

Alternative Visuals

3D view of all units

Conditional Complexity per Extension

51+

26-50

11-25

6-10

1-5

Conditional Complexity per Logical Component

primary logical decomposition

51+

26-50

11-25

6-10

1-5

Most Complex Units

Top 50 most complex units

Unit	# lines	McCabe index	# params
static void recvCompleteCallback() in src/mqtt_client.c	214	47	4
int mqtt_codec_bytesReceived() in src/mqtt_codec.c	120	36	3
static int constructConnPayload() in src/mqtt_codec.c	127	33	3
BUFFER_HANDLE mqtt_codec_publish() in src/mqtt_codec.c	103	21	8
static int cloneMqttOptions() in src/mqtt_client.c	101	21	2
static void ProcessPublishMessage() in src/mqtt_client.c	80	19	4
void mqtt_client_dowork() in src/mqtt_client.c	53	13	1
BUFFER_HANDLE mqtt_codec_subscribe() in src/mqtt_codec.c	57	11	4
BUFFER_HANDLE mqtt_codec_unsubscribe() in src/mqtt_codec.c	57	11	4
static int prepareheaderDataInfo() in src/mqtt_codec.c	59	10	2
BUFFER_HANDLE mqtt_codec_connect() in src/mqtt_codec.c	57	10	2
static void onOpenComplete() in src/mqtt_client.c	53	10	2
static void SendMessageAck() in src/mqtt_client.c	45	10	3
static int constructPublishVariableHeader() in src/mqtt_codec.c	49	8	3
int mqtt_client_subscribe() in src/mqtt_client.c	41	8	4
int mqtt_client_unsubscribe() in src/mqtt_client.c	41	8	4
int mqttmessage_getTopicLevels() in src/mqtt_message.c	34	7	3
static void logIncomingRawTrace() in src/mqtt_client.c	24	7	5
int mqtt_client_publish() in src/mqtt_client.c	55	7	2
MQTT_MESSAGE_HANDLE mqttmessage_create() in src/mqtt_message.c	50	6	5
static int addListItemsToUnsubscribePacket() in src/mqtt_codec.c	29	6	4
static int addListItemsToSubscribePacket() in src/mqtt_codec.c	30	6	4
static void close_connection() in src/mqtt_client.c	26	6	1
static void sendComplete() in src/mqtt_client.c	27	6	2
static void logOutgoingRawTrace() in src/mqtt_client.c	15	6	3
static void clear_mqtt_options() in src/mqtt_client.c	28	6	1
MQTT_CLIENT_HANDLE mqtt_client_init() in src/mqtt_client.c	48	6	5
int mqtt_client_connect() in src/mqtt_client.c	36	6	3
int mqtt_client_disconnect() in src/mqtt_client.c	55	6	3
static int constructFixedHeader() in src/mqtt_codec.c	37	5	3
static void getLogTime() in src/mqtt_client.c	26	5	2
MQTT_MESSAGE_HANDLE mqttmessage_create_in_place() in src/mqtt_message.c	27	4	5
void mqttmessage_destroy() in src/mqtt_message.c	15	4	1
static int constructConnectVariableHeader() in src/mqtt_codec.c	29	4	3
static BUFFER_HANDLE constructPublishReply() in src/mqtt_codec.c	30	4	3
BUFFER_HANDLE mqtt_codec_disconnect() in src/mqtt_codec.c	27	4	0
BUFFER_HANDLE mqtt_codec_ping() in src/mqtt_codec.c	27	4	0
static uint16_t byteutil_read_uint16() in src/mqtt_client.c	14	4	2
static void log_outgoing_trace() in src/mqtt_client.c	9	4	2
static void log_incoming_trace() in src/mqtt_client.c	9	4	2
void mqtt_client_set_trace() in src/mqtt_client.c	29	4	3
MQTT_MESSAGE_HANDLE mqttmessage_clone() in src/mqtt_message.c	19	3	1
static int constructSubscibeTypeVariableHeader() in src/mqtt_codec.c	22	3	2
static void on_connection_closed() in src/mqtt_client.c	12	3	1
static int sendPacketItem() in src/mqtt_client.c	21	3	3
static void onBytesReceived() in src/mqtt_client.c	16	3	3
static void onIoError() in src/mqtt_client.c	12	3	1
int mqtt_client_send_message_response() in src/mqtt_client.c	16	3	3
uint16_t mqttmessage_getPacketId() in src/mqtt_message.c	14	2	1
QOS_VALUE mqttmessage_getQosType() in src/mqtt_message.c	14	2	1