1 | #ifndef _theplu_yat_utility_option_arg_ |
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2 | #define _theplu_yat_utility_option_arg_ |
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3 | |
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4 | // $Id: OptionArg.h 1487 2008-09-10 08:41:36Z jari $ |
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5 | |
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6 | /* |
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7 | Copyright (C) 2007 Jari Häkkinen, Peter Johansson |
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8 | Copyright (C) 2008 Peter Johansson |
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9 | |
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10 | This file is part of the yat library, http://dev.thep.lu.se/yat |
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11 | |
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12 | The yat library is free software; you can redistribute it and/or |
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13 | modify it under the terms of the GNU General Public License as |
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14 | published by the Free Software Foundation; either version 3 of the |
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15 | License, or (at your option) any later version. |
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16 | |
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17 | The yat library is distributed in the hope that it will be useful, |
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18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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20 | General Public License for more details. |
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21 | |
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22 | You should have received a copy of the GNU General Public License |
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23 | along with yat. If not, see <http://www.gnu.org/licenses/>. |
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24 | */ |
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25 | |
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26 | #include "Option.h" |
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27 | #include "CommandLine.h" |
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28 | #include "Exception.h" |
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29 | |
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30 | #include <string> |
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31 | #include <sstream> |
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32 | |
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33 | namespace theplu { |
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34 | namespace yat { |
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35 | namespace utility { |
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36 | |
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37 | class CommandLine; |
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38 | /** |
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39 | \brief Option with argument |
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40 | |
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41 | If the option is present, argument is set during |
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42 | parsing. Supported formats are both gnu-style |
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43 | "--support-gnu=value", POSIX-like "--support-posix value", as |
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44 | well as shorter "-s value". The argument of an parameter is |
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45 | retrived by the value() function |
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46 | */ |
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47 | template<typename T> |
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48 | class OptionArg : public Option |
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49 | { |
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50 | public: |
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51 | /** |
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52 | \brief Constructor |
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53 | |
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54 | \param cmd Commandline Option is associated with |
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55 | \param name string such as "help" for --help, "h" for -h or |
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56 | "h,help" for having both short and long option name |
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57 | \param desc string used in help display |
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58 | \param required If true option must be found in commandline or |
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59 | exception is thrown in validation |
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60 | */ |
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61 | OptionArg(CommandLine& cmd, std::string name, std::string desc, |
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62 | bool required=false) |
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63 | : Option(cmd, name, desc), required_(required) {} |
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64 | |
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65 | /** |
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66 | \return value |
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67 | */ |
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68 | T value(void) const { return value_; } |
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69 | |
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70 | protected: |
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71 | /** |
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72 | \return true if Option is required, i.e., if Option is not |
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73 | found during parsing an exception will be thrown. |
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74 | */ |
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75 | inline bool required(void) const { return required_; } |
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76 | |
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77 | private: |
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78 | bool required_; |
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79 | T value_; |
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80 | |
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81 | void do_parse(std::vector<std::string>::iterator& first, |
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82 | const std::vector<std::string>::iterator& last) |
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83 | { |
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84 | if ( first->size()>2 && (*first)[0]=='-' && (*first)[1]!='-'){ |
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85 | std::stringstream ss; |
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86 | ss << "option requires an argument -- " << short_name() << "\n" |
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87 | << cmd().try_help(); |
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88 | throw cmd_error(ss.str()); |
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89 | } |
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90 | if (first+1==last ) { |
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91 | if (first->size()>2){ |
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92 | std::stringstream ss; |
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93 | ss << "option `--" << long_name() << "' requires an argument\n" |
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94 | << cmd().try_help(); |
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95 | throw cmd_error(ss.str()); |
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96 | } |
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97 | else { |
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98 | std::stringstream ss; |
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99 | ss << "option requires an argument -- " << short_name() << "\n" |
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100 | << cmd().try_help(); |
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101 | throw cmd_error(ss.str()); |
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102 | } |
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103 | } |
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104 | |
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105 | if ( *(first+1)->begin() == '"' && *((first+1)->end()-1) == '"') |
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106 | *(first+1) = (first+1)->substr(1, (first+1)->size()-2); |
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107 | assign(value_, *(++first)); |
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108 | } |
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109 | |
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110 | void assign(std::string& lhs, std::string rhs ) |
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111 | { |
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112 | lhs = rhs; |
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113 | } |
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114 | |
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115 | template<class T1> |
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116 | void assign(T1& lhs, std::string rhs ) |
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117 | { |
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118 | std::stringstream ss(rhs); |
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119 | ss >> lhs; |
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120 | bool fail = ss.fail(); |
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121 | std::string str; |
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122 | ss >> str; |
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123 | if (fail || str.size()) { |
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124 | std::stringstream sstr(rhs); |
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125 | sstr << ": invalid argument"; |
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126 | throw cmd_error(sstr.str()); |
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127 | } |
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128 | } |
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129 | |
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130 | /** |
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131 | */ |
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132 | void do_validate(void) const |
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133 | { |
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134 | if (required_ && !present()) { |
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135 | std::stringstream ss; |
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136 | ss << "mandatory option `"; |
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137 | if (long_name().size()) |
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138 | ss << long_name(); |
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139 | else |
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140 | ss << short_name(); |
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141 | ss << "' not given\n"; |
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142 | ss << cmd().try_help(); |
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143 | throw cmd_error(ss.str()); |
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144 | } |
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145 | do_validate2(); |
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146 | } |
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147 | |
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148 | |
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149 | virtual void do_validate2(void) const {} |
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150 | }; |
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151 | |
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152 | }}} // of namespace utility, yat, and theplu |
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153 | |
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154 | #endif |
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