shell/source/tools/lngconvex/cmdline.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <stdexcept>
  21 #include "cmdline.hxx"
  22
  23 /** Simple command line abstraction
  24 */
  25
  26 // Creation
  27
  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 */
  52 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 */
  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: */