int main()

in dmg/dmg.c [46:142]
90 lines of code
21 McCabe index (conditional complexity)

int main(int argc, char* argv[]) {
	int partNum;
	AbstractFile* in;
	AbstractFile* out;
	int opt;
	char *cmd, *infile, *outfile;
	char *key = NULL;
	Compressor comp = {.level = COMPRESSION_LEVEL_DEFAULT };
	int ret;
	int runSectors = DEFAULT_SECTORS_AT_A_TIME;

	TestByteOrder();
	initDefaultCompressor(&comp);

	const char *optstring = "k:c:l:r:";
	const struct option longopts[] = {
		{"key", required_argument, NULL, 'k'},
		{"compression", required_argument, NULL, 'c'},
		{"level", required_argument, NULL, 'l'},
		{"run-sectors", required_argument, NULL, 'r'},
		{NULL, 0, NULL, 0},
	};

	while ((opt = getopt_long(argc, argv, optstring, longopts, NULL)) != -1) {
		switch (opt) {
			case 'k':
				key = optarg;
				break;
			case 'c':
				ret = getCompressor(&comp, optarg);
				if (ret != 0) {
					fprintf(stderr, "Unknown compressor \"%s\"\nAllowed options are: %s\n", optarg, compressionNames());
					return 2;
				}
				break;
			case 'l':
				sscanf(optarg, "%d", &comp.level);
				break;
			case 'r':
				sscanf(optarg, "%d", &runSectors);
				if (runSectors < DEFAULT_SECTORS_AT_A_TIME) {
					fprintf(stderr, "Run size must be at least %d sectors\n", DEFAULT_SECTORS_AT_A_TIME);
					return 2;
				}
				break;
			default:
				usage(argv[0]);
		}
	}

	if (argc < optind + 3) {
		usage(argv[0]);
	}
	cmd = argv[optind++];
	infile = argv[optind++];
	outfile = argv[optind++];

	if(!buildInOut(infile, outfile, &in, &out)) {
		return -1;
	}
	if(key != NULL) {
		in = createAbstractFileFromFileVault(in, key);
	}

	if(strcmp(cmd, "extract") == 0) {
		partNum = -1;
		if (optind < argc) {
				sscanf(argv[optind++], "%d", &partNum);
		}
		extractDmg(in, out, partNum);
	} else if(strcmp(cmd, "build") == 0) {
		char *anchor = NULL;
		if (optind < argc) {
			anchor = argv[optind++];
		}
		buildDmg(in, out, SECTOR_SIZE, anchor, &comp, runSectors);
	} else if(strcmp(cmd, "build2048") == 0) {
		buildDmg(in, out, 2048, NULL, &comp, runSectors);
	} else if(strcmp(cmd, "res") == 0) {
		outResources(in, out);
	} else if(strcmp(cmd, "iso") == 0) {
		convertToISO(in, out);
	} else if(strcmp(cmd, "dmg") == 0) {
		convertToDMG(in, out, &comp, runSectors);
	} else if(strcmp(cmd, "attribute") == 0) {
		char *anchor, *data;
		if(argc < optind + 2) {
			printf("Not enough arguments: attribute <in> <out> <sentinel> <string>");
			return 2;
		}
		anchor = argv[optind++];
		data = argv[optind++];
		updateAttribution(in, out, anchor, data, strlen(data));
	}

	return 0;
}