1 /**
2  * Copyright © 2016 IBM Corporation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "argument.hpp"
18 
19 #include <algorithm>
20 #include <cassert>
21 #include <iostream>
22 #include <iterator>
23 
24 namespace phosphor
25 {
26 namespace led
27 {
28 ArgumentParser::ArgumentParser(int argc, char** argv)
29 {
30     int option = 0;
31     while (-1 !=
32            (option = getopt_long(argc, argv, optionstr, &options[0], nullptr)))
33     {
34         switch (option)
35         {
36             case '?':
37             case 'h':
38                 usage(argv);
39                 exit(-1);
40                 break;
41             case 'p':
42                 arguments["path"] = optarg;
43                 break;
44         }
45     }
46 }
47 
48 const std::string& ArgumentParser::operator[](const std::string& opt)
49 {
50     static const std::string emptyString{};
51 
52     auto i = arguments.find(opt);
53     if (i == arguments.end())
54     {
55         return emptyString;
56     }
57 
58     return i->second;
59 }
60 
61 void ArgumentParser::usage(char** argv)
62 {
63     // NOLINTNEXTLINE
64     std::cerr << "Usage: " << argv[0] << " [options]" << std::endl;
65     std::cerr << "Options:" << std::endl;
66     std::cerr << "    --help               Print this menu" << std::endl;
67     std::cerr << "    --path=<path>        absolute path of LED in sysfs; like";
68     std::cerr << " /sys/class/leds/<name>" << std::endl;
69 }
70 } // namespace led
71 } // namespace phosphor
72