• There are 21 files with units, with 3,877 lines of code.
• 0 very complex files (McCabe index sum 251+; 0 lines of code)
• 3 complex files (McCabe index sum 126-250; 1,884 lines of code)
• 2 medium complex files (McCabe index sum 51-125; 515 lines of code)
• 6 slightly complex files (McCabe index sum 26-50; 996 lines of code)
• 10 simple files (McCabe index sum 1-25; 482 lines of code)
• 14 main files have no units (e.g. languages without unit analysis, or files without functions) and are not classified.

The McCabe index of a file grows with its size: per 100 lines tells a large but plain file from a dense one, and most complex unit whether the complexity sits in one unit or is spread over many.

File	# lines	# units	McCabe index (sum)	per 100 lines	most complex unit
substitution.cpp in src	621	30	240	39	40
slicing.cpp in src	559	19	229	41	32
elimination.cpp in src	704	15	143	20	23
gate.cpp in src	369	14	92	25	21
gate.h in src	146	58	59	40	2
amulet.cpp in src	167	2	43	26	42
polynomial.cpp in src	281	12	37	13	13
term.cpp in src	192	9	36	19	10
nss.cpp in src	124	5	34	27	10
polynomial_solver.cpp in src	125	3	33	26	23
pac.cpp in src	107	8	29	27	7
parser.cpp in src	82	4	22	27	8
aig.cpp in src	51	13	14	27	2
signal_statistics.cpp in src	90	8	11	12	2
substitution_engine.cpp in src	49	2	10	20	9
monomial.cpp in src	54	2	9	17	7
term.h in src	39	7	7	18	1
hash_val.cpp in src	25	3	6	24	3
polynomial.h in src	49	5	5	10	1
variable.h in src	21	3	3	14	1
monomial.h in src	22	3	3	14	1

• File complexity is the sum of the McCabe indexes (conditional complexity) of the units (methods, functions...) in a file.
• Files are classified in five categories based on that sum: 1-25 (simple files), 26-50 (slightly complex files), 51-125 (medium complex files), 126-250 (complex files), 251+ (very complex files). The default bands are five times the unit complexity bands, as a file is a group of units.
• Only main code files with units are classified. Files without units (languages without unit analysis, or files without functions) have no complexity to measure and are left out rather than counted as simple.
• A very complex file holds many decisions, which often means it has too many responsibilities: a candidate to split, and a place where changes need more testing.