boost 命令行解析库，包括正则表达式检查IP格式

示例如下：

 

 1 #include <boost/program_options.hpp>
 2 #include <boost/foreach.hpp>
 3 #include <boost/xpressive/xpressive_dynamic.hpp>
 4 
 5 using namespace boost;
 6 namespace po = boost::program_options;
 7 
 8 #include <iostream>
 9 #include <algorithm>
10 #include <iterator>
11 using namespace std;
12 
13 bool CheckIP(const char *ip)  
14 {
15     boost::xpressive::cregex reg_ip = boost::xpressive::cregex::compile("(25[0-4]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[1-9])[.](25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])[.](25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])[.](25[0-4]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[1-9])");   
16     return  boost::xpressive::regex_match(ip, reg_ip);  
17 }
18 
19 int main(int argc, char* argv[])
20 {
21     try {
22         int opt;
23         int portnum;
24         po::options_description desc("Allowed options");
25         desc.add_options()
26             ("help,h", "produce help message")
27             ("optimization,o", po::value<int>(&opt)->default_value(10),
28                   "optimization level")
29             ("verbose,v", po::value<int>()->implicit_value(1),
30                   "enable verbosity (optionally specify level)")
31             ("listen,l", po::value<int>(&portnum)->implicit_value(1001)
32                   ->default_value(0,"no"),
33                   "listen on a port.")
34             ("ip,i", po::value<string>(), "IP address")
35             ("input-file,f", po::value< vector<string> >(), "input file")
36         ;
37 
38         po::variables_map vm;
39         po::store(po::command_line_parser(argc, argv).options(desc).run(), vm);
40         po::notify(vm);
41 
42         if (argc == 1 || vm.count("help")) {
43             cout << "Usage: \n";
44             cout << desc << endl;;
45             return 0;
46         }
47 
48         if (vm.count("input-file")) {
49             string path_str("");
50             BOOST_FOREACH(string path, vm["input-file"].as< vector<string> >())
51                 path_str += path + " ";
52             cout << "Input file are: " << path_str << endl;
53         }
54 
55         if (vm.count("ip")) {
56             string ip_str = vm["ip"].as<string>();
57 
58             if (CheckIP(ip_str.c_str())) {
59                 cout << "IP address is: " << ip_str << "\n";
60             } else {
61                 cout << "Bad IP format!\n";
62                 return 1;
63             }
64         }
65 
66         if (vm.count("verbose")) {
67             cout << "Verbosity enabled.  Level is " << vm["verbose"].as<int>()
68                  << "\n";
69         }
70 
71         cout << "Optimization level is " << opt << "\n";
72         cout << "Listen port is " << portnum << "\n";
73     } catch(std::exception& e) {
74         cout << e.what() << "\n";
75         return 1;
76     }
77 
78     return 0;
79 }

 

posted @ 2017-10-15 11:42  lausaa  阅读(479)  评论(0)    收藏  举报