apache / mynewt-core - 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 2,446 units with 55,489 lines of code in units (10.5% of code).

22 very complex units (5,695 lines of code)
54 complex units (6,761 lines of code)
146 medium complex units (9,050 lines of code)
278 simple units (9,628 lines of code)
1,946 very simple units (24,355 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
FRESULT f_mkfs() in fs/fatfs/src/ff.c	393	152	5
static int lcp_nakci() in net/ip/lwip_base/src/netif/ppp/lcp.c	323	119	4
static int lcp_reqci() in net/ip/lwip_base/src/netif/ppp/lcp.c	377	85	4
FRESULT create_name() in fs/fatfs/src/ff.c	168	83	2
int vsscanf() in libc/baselibc/src/vsscanf.c	298	82	3
static int ccp_reqci() in net/ip/lwip_base/src/netif/ppp/ccp.c	215	77	4
uint32_t am_hal_mspi_control() in hw/mcu/ambiq/apollo3/src/ext/AmbiqSuite/mcu/apollo3/hal/am_hal_mspi.c	419	76	3
static int ipcp_nakci() in net/ip/lwip_base/src/netif/ppp/ipcp.c	214	73	4
uint32_t am_hal_iom_control() in hw/mcu/ambiq/apollo3/src/ext/AmbiqSuite/mcu/apollo3/hal/am_hal_iom.c	390	72	3
int ppp_vslprintf() in net/ip/lwip_base/src/netif/ppp/utils.c	267	70	4
static int lcp_rejci() in net/ip/lwip_base/src/netif/ppp/lcp.c	198	69	3
FRESULT find_volume() in fs/fatfs/src/ff.c	172	68	3
static int ipcp_reqci() in net/ip/lwip_base/src/netif/ppp/ipcp.c	226	68	4
void SystemInit() in hw/mcu/nordic/nrf52xxx/src/system_nrf52.c	280	66	1
static int eap_printpkt() in net/ip/lwip_base/src/netif/ppp/eap.c	268	64	3
static int lcp_printpkt() in net/ip/lwip_base/src/netif/ppp/lcp.c	239	63	3
static void eap_request() in net/ip/lwip_base/src/netif/ppp/eap.c	319	62	4
static void ipcp_up() in net/ip/lwip_base/src/netif/ppp/ipcp.c	176	56	1
static CborError value_to_pretty() in encoding/tinycbor/src/cborpretty.c	152	55	2
int32_t dw_iic_control() in hw/mcu/arc/src/ext/sdk/device/designware/iic/dw_iic.c	189	52	3
static int lcp_ackci() in net/ip/lwip_base/src/netif/ppp/lcp.c	158	51	3
static void eap_response() in net/ip/lwip_base/src/netif/ppp/eap.c	254	51	4
FRESULT f_lseek() in fs/fatfs/src/ff.c	141	48	2
int32_t dw_spi_control() in hw/mcu/arc/src/ext/sdk/device/designware/spi/dw_spi.c	207	47	3
static CborError value_to_json() in encoding/tinycbor/src/cbortojson.c	138	45	5
FRESULT f_open() in fs/fatfs/src/ff.c	180	44	3
static void eap_figure_next_state() in net/ip/lwip_base/src/netif/ppp/eap.c	182	44	2
void __attribute__() in hw/mips-hal/src/arch/mips/mips_excpt_handler.c	189	43	1
static void pppol2tp_dispatch_control_packet() in net/ip/lwip_base/src/netif/ppp/pppol2tp.c	194	41	5
void SystemInit_ExtMemCtl() in hw/mcu/stm/stm32f4xx/src/system_stm32f4xx.c	172	41	1
FRESULT f_setlabel() in fs/fatfs/src/ff.c	107	40	1
static int ccp_ackci() in net/ip/lwip_base/src/netif/ppp/ccp.c	80	40	3
void xvprintf() in hw/mcu/arc/src/ext/sdk/common/xprintf.c	71	38	2
int f_printf() in fs/fatfs/src/ff.c	84	37	3
static void ccp_resetci() in net/ip/lwip_base/src/netif/ppp/ccp.c	157	37	1
static int ipv6cp_reqci() in net/ip/lwip_base/src/netif/ppp/ipv6cp.c	135	36	4
static int ccp_rejci() in net/ip/lwip_base/src/netif/ppp/ccp.c	68	36	3
FRESULT f_write() in fs/fatfs/src/ff.c	106	35	4
int32_t dw_uart_control() in hw/mcu/arc/src/ext/sdk/device/designware/uart/dw_uart.c	137	35	3
uint32_t am_hal_mspi_interrupt_service() in hw/mcu/ambiq/apollo3/src/ext/AmbiqSuite/mcu/apollo3/hal/am_hal_mspi.c	183	35	2
LoRaMacStatus_t LoRaMacMibGetRequestConfirm() in net/lora/node/src/mac/LoRaMac.c	114	33	1
static int ccp_printpkt() in net/ip/lwip_base/src/netif/ppp/ccp.c	114	33	3
void ppp_input() in net/ip/lwip_base/src/netif/ppp/ppp.c	145	33	2
static int ipcp_rejci() in net/ip/lwip_base/src/netif/ppp/ipcp.c	127	33	3
size_t tfp_format() in libc/baselibc/src/tinyprintf.c	156	32	3
PhyParam_t RegionAS923GetPhyParam() in net/lora/node/src/mac/region/RegionAS923.c	177	32	1
static int ipcp_ackci() in net/ip/lwip_base/src/netif/ppp/ipcp.c	121	32	3
FRESULT f_expand() in fs/fatfs/src/ff.c	75	31	3
static int ipv6cp_nakci() in net/ip/lwip_base/src/netif/ppp/ipv6cp.c	100	31	4
static int ccp_nakci() in net/ip/lwip_base/src/netif/ppp/ccp.c	66	31	4