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18  */
19 
20 #include <stdexcept>
21 #include "cmdline.hxx"
22 
23 /** Simple command line abstraction
24 */
25 
26 // Creation
27 
CommandLine(size_t argc,char * argv[])28 CommandLine::CommandLine(size_t argc, char* argv[])
29     : m_argc(argc)
30     , m_argv(argv)
31 {
32 }
33 
34 // Query
35 
36 /** Returns an argument by name. If there are
37     duplicate argument names in the command line,
38     the first one wins.
39     Argument name and the argument value must be separated
40     by spaces. If the argument value starts with an
41     argument prefix use quotes else the return value is
42     an empty string because the value will be interpreted
43     as the next argument name.
44     If an argument value contains spaces use quotes.
45 
46     @precond    GetArgumentNames() -> has element ArgumentName
47 
48     @throws std::invalid_argument exception
49     if the specified argument could not be
50     found
51 */
get_arg(const std::string & ArgumentName) const52 std::string CommandLine::get_arg(const std::string& ArgumentName) const
53 {
54     std::string arg_value;
55     size_t i;
56     for (i = 0; i < m_argc; i++)
57     {
58         std::string arg = m_argv[i];
59 
60         if (ArgumentName == arg && ((i + 1) < m_argc) && !is_arg_name(m_argv[i + 1]))
61         {
62             arg_value = m_argv[i + 1];
63             break;
64         }
65     }
66 
67     if (i == m_argc)
68         throw std::invalid_argument("Invalid argument name");
69 
70     return arg_value;
71 }
72 
73 // Command
74 
75 /** Returns whether a given argument is an argument name
76 */
is_arg_name(const std::string & Argument)77 bool CommandLine::is_arg_name(const std::string& Argument)
78 {
79     return (Argument.length() > 0 && Argument[0] == '-');
80 }
81 
82 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
83