JetBrains / CMake 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 16,934 units with 374,811 lines of code in units (46.7% of code).

122 very complex units (42,081 lines of code)
339 complex units (45,160 lines of code)
1,338 medium complex units (84,587 lines of code)
2,132 simple units (67,661 lines of code)
13,003 very simple units (135,322 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
int cmcmd::ExecuteCMakeCommand() in Source/cmcmd.cxx	840	266	2
ssize_t nghttp2_session_mem_recv() in Utilities/cmnghttp2/lib/nghttp2_session.c	1116	250	3
static CURLcode setopt_long() in Utilities/cmcurl/lib/setopt.c	757	248	3
static CURLcode myssh_statemach_act() in Utilities/cmcurl/lib/vssh/libssh.c	1094	226	2
static CURLcode ssh_statemachine() in Utilities/cmcurl/lib/vssh/libssh2.c	1067	211	2
int ZEXPORT inflate() in Utilities/cmzlib/inflate.c	635	204	2
static CURLcode setopt_cptr() in Utilities/cmcurl/lib/setopt.c	634	196	3
bool HandleTargetsMode() in Source/cmInstallCommand.cxx	757	190	2
cm::optional cmCoreTryCompile::TryCompileCode() in Source/cmCoreTryCompile.cxx	840	173	2
size_t Curl_ftp_parselist() in Utilities/cmcurl/lib/ftplistparser.c	646	159	4
void cmGlobalXCodeGenerator::CreateBuildSettings() in Source/cmGlobalXCodeGenerator.cxx	600	144	3
static int32_t lookup_token() in Utilities/cmnghttp2/lib/nghttp2_hd.c	366	132	2
void cmGlobalXCodeGenerator::AddDependAndLinkInformation() in Source/cmGlobalXCodeGenerator.cxx	469	131	1
bool SystemInformationImplementation::RetrieveClassicalCPUIdentity() in Source/kwsys/SystemInformation.cxx	477	119	0
CURLFORMcode FormAdd() in Utilities/cmcurl/lib/formdata.c	402	119	3
std::string cmRulePlaceholderExpander::ExpandVariable() in Source/cmRulePlaceholderExpander.cxx	323	117	1
static int _pdc_vsscanf() in Utilities/cmpdcurses/pdcurses/scanw.c	411	115	3
CURLcode Curl_ossl_ctx_init() in Utilities/cmcurl/lib/vtls/openssl.c	411	112	10
bool HandleStringsCommand() in Source/cmFileCommand.cxx	318	111	2
static llparse_state_t llpkgc__internal__run() in Utilities/cmllpkgc/llpkgc__internal.c	911	110	3
CURLUcode curl_url_get() in Utilities/cmcurl/lib/urlapi.c	268	110	4
static int formatf() in Utilities/cmcurl/lib/mprintf.c	314	109	2
static int parsefmt() in Utilities/cmcurl/lib/mprintf.c	377	108	6
bool cmQtAutoMocUicT::InitFromInfo() in Source/cmQtAutoMocUic.cxx	366	107	1
static CURLcode http_header() in Utilities/cmcurl/lib/http.c	278	105	3
bool cmExecuteProcessCommand() in Source/cmExecuteProcessCommand.cxx	442	104	2
bool cmQtAutoGenInitializer::InitScanFiles() in Source/cmQtAutoGenInitializer.cxx	327	104	0
int RegExpFind::regmatch() in Source/kwsys/RegularExpression.cxx	182	103	1
IntNative main() in Utilities/cmbzip2/bzip2.c	213	103	2
int uv_translate_sys_error() in Utilities/cmlibuv/src/win/error.c	107	101	1
static CURLcode ftp_statemachine() in Utilities/cmcurl/lib/ftp.c	320	101	2
Int32 BZ2_decompress() in Utilities/cmbzip2/decompress.c	438	99	1
bool cmAddCustomCommandCommand() in Source/cmAddCustomCommandCommand.cxx	514	98	2
static bool url_match_conn() in Utilities/cmcurl/lib/url.c	236	98	2
void cmake::SetArgs() in Source/cmake.cxx	697	97	1
static CURLproxycode do_SOCKS5() in Utilities/cmcurl/lib/socks.c	421	97	3
bool HandleDownloadCommand() in Source/cmFileCommand.cxx	415	92	2
CURLUcode curl_url_set() in Utilities/cmcurl/lib/urlapi.c	266	91	4
int cert_stuff() in Utilities/cmcurl/lib/vtls/openssl.c	463	90	9
void cmNinjaNormalTargetGenerator::WriteLinkStatement() in Source/cmNinjaNormalTargetGenerator.cxx	453	87	3
bool cmFindPackageCommand::InitialPass() in Source/cmFindPackageCommand.cxx	310	87	1
bool SystemInformationImplementation::RetrieveClassicalCPUCacheDetails() in Source/kwsys/SystemInformation.cxx	260	87	0
int ZEXPORT deflate() in Utilities/cmzlib/deflate.c	257	85	2
static CURLcode sectransp_connect_step2() in Utilities/cmcurl/lib/vtls/sectransp.c	277	85	2
void cmGlobalGenerator::EnableLanguage() in Source/cmGlobalGenerator.cxx	361	84	3
static CURLcode wssh_statemach_act() in Utilities/cmcurl/lib/vssh/wolfssh.c	392	84	2
void cmMakefileTargetGenerator::WriteObjectRuleFiles() in Source/cmMakefileTargetGenerator.cxx	543	83	1
static CURLcode rtsp_do() in Utilities/cmcurl/lib/rtsp.c	292	81	2
void cmVisualStudio10TargetGenerator::WriteClassicMsBuildProjectFile() in Source/cmVisualStudio10TargetGenerator.cxx	383	80	1
std::string Evaluate() in Source/cmGeneratorExpressionNode.cxx	554	77	4