C++ ObjectFactory::create方法代码示例

int main(int argc, char** argv) {
	try {
		std::map<std::string, std::string> engines;
		ObjectFactory<std::string, Engine> engineFactory;

		ENGINE("groovie", "Groovie", Groovie::GroovieEngine);
		ENGINE("kyra2", "Legend of Kyrandia: Hand of Fate", Kyra::Kyra2Engine);
		ENGINE("scummv6", "SCUMM v6", Scumm::v6::Scummv6Engine);

		po::options_description visible("Options");
		visible.add_options()
			("help,h", "Produce this help message.")
			("engine,e", po::value<std::string>(), "Engine the script originates from.")
			("list,l", "List the supported engines.")
			("dump-disassembly,d", po::value<std::string>()->implicit_value(""), "Dump the disassembly to a file. Leave out filename to output to stdout.")
			("dump-graph,g", po::value<std::string>()->implicit_value(""), "Output the control flow graph in dot format to a file. Leave out filename to output to stdout.")
			("only-disassembly,D", "Stops after disassembly. Implies -d.")
			("only-graph,G", "Stops after control flow graph has been generated. Implies -g.")
			("show-unreachable,u", "Show the address and contents of unreachable groups in the script.")
			("variant,v", po::value<std::string>()->default_value(""), "Tell the engine that the script is from a specific variant. To see a list of variants supported by a specific engine, use the -h option and the -e option together.")
			("no-stack-effect,s", "Leave out the stack effect when printing raw instructions.");

		po::options_description args("");
		args.add(visible).add_options()
			("input-file", po::value<std::string>(), "Input file");

		po::positional_options_description fileArg;
		fileArg.add("input-file", -1);

		po::variables_map vm;
		try {
			// FIXME: If specified as the last parameter before the input file name, -d currently requires a filename to specified. -d must be specified earlier than that if outputting to stdout.
			po::store(po::command_line_parser(argc, argv).options(args).positional(fileArg).run(), vm);
			po::notify(vm);
		} catch (std::exception& e) {
			std::cout << e.what() << std::endl;
		}

		if (vm.count("list")) {
			std::cout << "Available engines:" << "\n";

			std::map<std::string, std::string>::iterator it;
			for (it = engines.begin(); it != engines.end(); it++)
				std::cout << (*it).first << " " << (*it).second << "\n";

			return 0;
		}

		if (vm.count("help") || !vm.count("input-file")) {
			std::cout << "Usage: " << argv[0] << " [option...] file" << "\n";
			std::cout << visible << "\n";
			if (vm.count("engine") && engines.find(vm["engine"].as<std::string>()) != engines.end()) {
				Engine *engine = engineFactory.create(vm["engine"].as<std::string>());
				std::vector<std::string> variants;
				engine->getVariants(variants);
				if (variants.empty()) {
					std::cout << engines[vm["engine"].as<std::string>()] << " does not use variants.\n";
				} else {
					std::cout << "Supported variants for " << engines[vm["engine"].as<std::string>()] << ":\n";
					for (std::vector<std::string>::iterator i = variants.begin(); i != variants.end(); ++i) {
						std::cout << "  " << *i << "\n";
					}
				}
				delete engine;
				std::cout << "\n";
			}
			std::cout << "Note: If outputting to stdout, -d or -g must NOT be specified immediately before the input file.\n";
			return 1;
		}

		if (!vm.count("engine")) {
			std::cout << "Engine must be specified.\n";
			return 2;
		} else if (engines.find(vm["engine"].as<std::string>()) == engines.end()) {
			std::cout << "Unknown engine.\n";
			return 2;
		}

		if (vm.count("no-stack-effect")) {
			setOutputStackEffect(false);
		}

		Engine *engine = engineFactory.create(vm["engine"].as<std::string>());
		engine->_variant = vm["variant"].as<std::string>();
		std::string inputFile = vm["input-file"].as<std::string>();

		// Disassembly
		InstVec insts;
		Disassembler *disassembler = engine->getDisassembler(insts);
		disassembler->open(inputFile.c_str());

		disassembler->disassemble();
		if (vm.count("dump-disassembly")) {
			std::streambuf *buf;
			std::ofstream of;

			if (vm["dump-disassembly"].as<std::string>() != "") {
				of.open(vm["dump-disassembly"].as<std::string>().c_str());
				buf = of.rdbuf();
			} else {
//.........这里部分代码省略.........