1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
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2 | * |
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3 | * This file is a part of LEMON, a generic C++ optimization library. |
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4 | * |
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5 | * Copyright (C) 2003-2010 |
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6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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8 | * |
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9 | * Permission to use, modify and distribute this software is granted |
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10 | * provided that this copyright notice appears in all copies. For |
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11 | * precise terms see the accompanying LICENSE file. |
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12 | * |
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13 | * This software is provided "AS IS" with no warranty of any kind, |
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14 | * express or implied, and with no claim as to its suitability for any |
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15 | * purpose. |
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16 | * |
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17 | */ |
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18 | |
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19 | #ifndef LEMON_ARG_PARSER_H |
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20 | #define LEMON_ARG_PARSER_H |
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21 | |
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22 | #include <vector> |
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23 | #include <map> |
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24 | #include <list> |
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25 | #include <string> |
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26 | #include <iostream> |
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27 | #include <sstream> |
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28 | #include <algorithm> |
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29 | #include <lemon/assert.h> |
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30 | |
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31 | ///\ingroup misc |
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32 | ///\file |
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33 | ///\brief A tool to parse command line arguments. |
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34 | |
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35 | namespace lemon { |
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36 | |
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37 | ///Exception used by ArgParser |
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38 | |
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39 | ///Exception used by ArgParser. |
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40 | /// |
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41 | class ArgParserException : public Exception { |
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42 | public: |
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43 | /// Reasons for failure |
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44 | |
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45 | /// Reasons for failure. |
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46 | /// |
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47 | enum Reason { |
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48 | HELP, ///< <tt>--help</tt> option was given. |
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49 | UNKNOWN_OPT, ///< Unknown option was given. |
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50 | INVALID_OPT ///< Invalid combination of options. |
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51 | }; |
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52 | |
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53 | private: |
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54 | Reason _reason; |
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55 | |
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56 | public: |
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57 | ///Constructor |
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58 | ArgParserException(Reason r) throw() : _reason(r) {} |
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59 | ///Virtual destructor |
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60 | virtual ~ArgParserException() throw() {} |
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61 | ///A short description of the exception |
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62 | virtual const char* what() const throw() { |
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63 | switch(_reason) |
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64 | { |
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65 | case HELP: |
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66 | return "lemon::ArgParseException: ask for help"; |
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67 | break; |
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68 | case UNKNOWN_OPT: |
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69 | return "lemon::ArgParseException: unknown option"; |
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70 | break; |
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71 | case INVALID_OPT: |
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72 | return "lemon::ArgParseException: invalid combination of options"; |
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73 | break; |
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74 | } |
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75 | return ""; |
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76 | } |
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77 | ///Return the reason for the failure |
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78 | Reason reason() const {return _reason; } |
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79 | }; |
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80 | |
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81 | |
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82 | ///Command line arguments parser |
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83 | |
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84 | ///\ingroup misc |
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85 | ///Command line arguments parser. |
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86 | /// |
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87 | ///For a complete example see the \ref arg_parser_demo.cc demo file. |
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88 | class ArgParser { |
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89 | |
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90 | static void _showHelp(void *p); |
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91 | protected: |
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92 | |
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93 | int _argc; |
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94 | const char * const *_argv; |
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95 | |
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96 | enum OptType { UNKNOWN=0, BOOL=1, STRING=2, DOUBLE=3, INTEGER=4, FUNC=5 }; |
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97 | |
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98 | class ParData { |
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99 | public: |
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100 | union { |
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101 | bool *bool_p; |
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102 | int *int_p; |
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103 | double *double_p; |
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104 | std::string *string_p; |
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105 | struct { |
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106 | void (*p)(void *); |
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107 | void *data; |
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108 | } func_p; |
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109 | |
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110 | }; |
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111 | std::string help; |
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112 | bool mandatory; |
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113 | OptType type; |
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114 | bool set; |
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115 | bool ingroup; |
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116 | bool has_syn; |
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117 | bool syn; |
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118 | bool self_delete; |
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119 | ParData() : mandatory(false), type(UNKNOWN), set(false), ingroup(false), |
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120 | has_syn(false), syn(false), self_delete(false) {} |
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121 | }; |
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122 | |
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123 | typedef std::map<std::string,ParData> Opts; |
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124 | Opts _opts; |
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125 | |
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126 | class GroupData |
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127 | { |
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128 | public: |
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129 | typedef std::list<std::string> Opts; |
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130 | Opts opts; |
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131 | bool only_one; |
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132 | bool mandatory; |
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133 | GroupData() :only_one(false), mandatory(false) {} |
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134 | }; |
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135 | |
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136 | typedef std::map<std::string,GroupData> Groups; |
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137 | Groups _groups; |
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138 | |
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139 | struct OtherArg |
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140 | { |
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141 | std::string name; |
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142 | std::string help; |
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143 | OtherArg(std::string n, std::string h) :name(n), help(h) {} |
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144 | |
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145 | }; |
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146 | |
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147 | std::vector<OtherArg> _others_help; |
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148 | std::vector<std::string> _file_args; |
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149 | std::string _command_name; |
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150 | |
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151 | |
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152 | private: |
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153 | //Bind a function to an option. |
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154 | |
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155 | //\param name The name of the option. The leading '-' must be omitted. |
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156 | //\param help A help string. |
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157 | //\retval func The function to be called when the option is given. It |
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158 | // must be of type "void f(void *)" |
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159 | //\param data Data to be passed to \c func |
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160 | ArgParser &funcOption(const std::string &name, |
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161 | const std::string &help, |
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162 | void (*func)(void *),void *data); |
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163 | |
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164 | bool _exit_on_problems; |
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165 | |
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166 | void _terminate(ArgParserException::Reason reason) const; |
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167 | |
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168 | public: |
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169 | |
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170 | ///Constructor |
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171 | ArgParser(int argc, const char * const *argv); |
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172 | |
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173 | ~ArgParser(); |
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174 | |
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175 | ///\name Options |
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176 | /// |
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177 | |
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178 | ///@{ |
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179 | |
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180 | ///Add a new integer type option |
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181 | |
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182 | ///Add a new integer type option. |
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183 | ///\param name The name of the option. The leading '-' must be omitted. |
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184 | ///\param help A help string. |
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185 | ///\param value A default value for the option. |
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186 | ///\param obl Indicate if the option is mandatory. |
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187 | ArgParser &intOption(const std::string &name, |
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188 | const std::string &help, |
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189 | int value=0, bool obl=false); |
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190 | |
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191 | ///Add a new floating point type option |
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192 | |
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193 | ///Add a new floating point type option. |
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194 | ///\param name The name of the option. The leading '-' must be omitted. |
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195 | ///\param help A help string. |
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196 | ///\param value A default value for the option. |
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197 | ///\param obl Indicate if the option is mandatory. |
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198 | ArgParser &doubleOption(const std::string &name, |
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199 | const std::string &help, |
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200 | double value=0, bool obl=false); |
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201 | |
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202 | ///Add a new bool type option |
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203 | |
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204 | ///Add a new bool type option. |
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205 | ///\param name The name of the option. The leading '-' must be omitted. |
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206 | ///\param help A help string. |
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207 | ///\param value A default value for the option. |
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208 | ///\param obl Indicate if the option is mandatory. |
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209 | ///\note A mandatory bool obtion is of very little use. |
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210 | ArgParser &boolOption(const std::string &name, |
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211 | const std::string &help, |
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212 | bool value=false, bool obl=false); |
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213 | |
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214 | ///Add a new string type option |
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215 | |
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216 | ///Add a new string type option. |
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217 | ///\param name The name of the option. The leading '-' must be omitted. |
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218 | ///\param help A help string. |
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219 | ///\param value A default value for the option. |
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220 | ///\param obl Indicate if the option is mandatory. |
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221 | ArgParser &stringOption(const std::string &name, |
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222 | const std::string &help, |
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223 | std::string value="", bool obl=false); |
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224 | |
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225 | ///Give help string for non-parsed arguments. |
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226 | |
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227 | ///With this function you can give help string for non-parsed arguments. |
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228 | ///The parameter \c name will be printed in the short usage line, while |
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229 | ///\c help gives a more detailed description. |
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230 | ArgParser &other(const std::string &name, |
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231 | const std::string &help=""); |
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232 | |
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233 | ///@} |
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234 | |
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235 | ///\name Options with External Storage |
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236 | ///Using this functions, the value of the option will be directly written |
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237 | ///into a variable once the option appears in the command line. |
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238 | |
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239 | ///@{ |
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240 | |
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241 | ///Add a new integer type option with a storage reference |
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242 | |
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243 | ///Add a new integer type option with a storage reference. |
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244 | ///\param name The name of the option. The leading '-' must be omitted. |
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245 | ///\param help A help string. |
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246 | ///\param obl Indicate if the option is mandatory. |
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247 | ///\retval ref The value of the argument will be written to this variable. |
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248 | ArgParser &refOption(const std::string &name, |
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249 | const std::string &help, |
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250 | int &ref, bool obl=false); |
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251 | |
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252 | ///Add a new floating type option with a storage reference |
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253 | |
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254 | ///Add a new floating type option with a storage reference. |
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255 | ///\param name The name of the option. The leading '-' must be omitted. |
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256 | ///\param help A help string. |
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257 | ///\param obl Indicate if the option is mandatory. |
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258 | ///\retval ref The value of the argument will be written to this variable. |
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259 | ArgParser &refOption(const std::string &name, |
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260 | const std::string &help, |
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261 | double &ref, bool obl=false); |
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262 | |
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263 | ///Add a new bool type option with a storage reference |
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264 | |
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265 | ///Add a new bool type option with a storage reference. |
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266 | ///\param name The name of the option. The leading '-' must be omitted. |
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267 | ///\param help A help string. |
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268 | ///\param obl Indicate if the option is mandatory. |
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269 | ///\retval ref The value of the argument will be written to this variable. |
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270 | ///\note A mandatory bool obtion is of very little use. |
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271 | ArgParser &refOption(const std::string &name, |
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272 | const std::string &help, |
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273 | bool &ref, bool obl=false); |
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274 | |
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275 | ///Add a new string type option with a storage reference |
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276 | |
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277 | ///Add a new string type option with a storage reference. |
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278 | ///\param name The name of the option. The leading '-' must be omitted. |
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279 | ///\param help A help string. |
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280 | ///\param obl Indicate if the option is mandatory. |
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281 | ///\retval ref The value of the argument will be written to this variable. |
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282 | ArgParser &refOption(const std::string &name, |
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283 | const std::string &help, |
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284 | std::string &ref, bool obl=false); |
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285 | |
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286 | ///@} |
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287 | |
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288 | ///\name Option Groups and Synonyms |
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289 | /// |
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290 | |
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291 | ///@{ |
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292 | |
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293 | ///Bundle some options into a group |
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294 | |
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295 | /// You can group some option by calling this function repeatedly for each |
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296 | /// option to be grouped with the same groupname. |
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297 | ///\param group The group name. |
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298 | ///\param opt The option name. |
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299 | ArgParser &optionGroup(const std::string &group, |
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300 | const std::string &opt); |
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301 | |
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302 | ///Make the members of a group exclusive |
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303 | |
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304 | ///If you call this function for a group, than at most one of them can be |
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305 | ///given at the same time. |
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306 | ArgParser &onlyOneGroup(const std::string &group); |
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307 | |
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308 | ///Make a group mandatory |
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309 | |
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310 | ///Using this function, at least one of the members of \c group |
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311 | ///must be given. |
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312 | ArgParser &mandatoryGroup(const std::string &group); |
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313 | |
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314 | ///Create synonym to an option |
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315 | |
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316 | ///With this function you can create a synonym \c syn of the |
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317 | ///option \c opt. |
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318 | ArgParser &synonym(const std::string &syn, |
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319 | const std::string &opt); |
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320 | |
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321 | ///@} |
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322 | |
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323 | private: |
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324 | void show(std::ostream &os,Opts::const_iterator i) const; |
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325 | void show(std::ostream &os,Groups::const_iterator i) const; |
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326 | void showHelp(Opts::const_iterator i) const; |
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327 | void showHelp(std::vector<OtherArg>::const_iterator i) const; |
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328 | |
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329 | void unknownOpt(std::string arg) const; |
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330 | |
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331 | void requiresValue(std::string arg, OptType t) const; |
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332 | void checkMandatories() const; |
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333 | |
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334 | void shortHelp() const; |
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335 | void showHelp() const; |
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336 | public: |
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337 | |
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338 | ///Start the parsing process |
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339 | ArgParser &parse(); |
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340 | |
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341 | /// Synonym for parse() |
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342 | ArgParser &run() |
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343 | { |
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344 | return parse(); |
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345 | } |
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346 | |
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347 | ///Give back the command name (the 0th argument) |
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348 | const std::string &commandName() const { return _command_name; } |
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349 | |
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350 | ///Check if an opion has been given to the command. |
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351 | bool given(std::string op) const |
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352 | { |
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353 | Opts::const_iterator i = _opts.find(op); |
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354 | return i!=_opts.end()?i->second.set:false; |
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355 | } |
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356 | |
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357 | |
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358 | ///Magic type for operator[] |
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359 | |
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360 | ///This is the type of the return value of ArgParser::operator[](). |
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361 | ///It automatically converts to \c int, \c double, \c bool or |
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362 | ///\c std::string if the type of the option matches, which is checked |
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363 | ///with an \ref LEMON_ASSERT "assertion" (i.e. it performs runtime |
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364 | ///type checking). |
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365 | class RefType |
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366 | { |
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367 | const ArgParser &_parser; |
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368 | std::string _name; |
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369 | public: |
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370 | ///\e |
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371 | RefType(const ArgParser &p,const std::string &n) :_parser(p),_name(n) {} |
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372 | ///\e |
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373 | operator bool() |
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374 | { |
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375 | Opts::const_iterator i = _parser._opts.find(_name); |
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376 | LEMON_ASSERT(i!=_parser._opts.end(), |
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377 | std::string()+"Unkown option: '"+_name+"'"); |
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378 | LEMON_ASSERT(i->second.type==ArgParser::BOOL, |
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379 | std::string()+"'"+_name+"' is a bool option"); |
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380 | return *(i->second.bool_p); |
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381 | } |
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382 | ///\e |
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383 | operator std::string() |
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384 | { |
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385 | Opts::const_iterator i = _parser._opts.find(_name); |
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386 | LEMON_ASSERT(i!=_parser._opts.end(), |
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387 | std::string()+"Unkown option: '"+_name+"'"); |
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388 | LEMON_ASSERT(i->second.type==ArgParser::STRING, |
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389 | std::string()+"'"+_name+"' is a string option"); |
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390 | return *(i->second.string_p); |
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391 | } |
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392 | ///\e |
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393 | operator double() |
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394 | { |
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395 | Opts::const_iterator i = _parser._opts.find(_name); |
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396 | LEMON_ASSERT(i!=_parser._opts.end(), |
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397 | std::string()+"Unkown option: '"+_name+"'"); |
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398 | LEMON_ASSERT(i->second.type==ArgParser::DOUBLE || |
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399 | i->second.type==ArgParser::INTEGER, |
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400 | std::string()+"'"+_name+"' is a floating point option"); |
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401 | return i->second.type==ArgParser::DOUBLE ? |
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402 | *(i->second.double_p) : *(i->second.int_p); |
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403 | } |
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404 | ///\e |
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405 | operator int() |
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406 | { |
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407 | Opts::const_iterator i = _parser._opts.find(_name); |
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408 | LEMON_ASSERT(i!=_parser._opts.end(), |
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409 | std::string()+"Unkown option: '"+_name+"'"); |
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410 | LEMON_ASSERT(i->second.type==ArgParser::INTEGER, |
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411 | std::string()+"'"+_name+"' is an integer option"); |
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412 | return *(i->second.int_p); |
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413 | } |
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414 | |
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415 | }; |
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416 | |
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417 | ///Give back the value of an option |
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418 | |
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419 | ///Give back the value of an option. |
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420 | ///\sa RefType |
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421 | RefType operator[](const std::string &n) const |
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422 | { |
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423 | return RefType(*this, n); |
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424 | } |
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425 | |
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426 | ///Give back the non-option type arguments. |
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427 | |
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428 | ///Give back a reference to a vector consisting of the program arguments |
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429 | ///not starting with a '-' character. |
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430 | const std::vector<std::string> &files() const { return _file_args; } |
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431 | |
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432 | ///Throw instead of exit in case of problems |
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433 | void throwOnProblems() |
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434 | { |
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435 | _exit_on_problems=false; |
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436 | } |
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437 | }; |
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438 | } |
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439 | |
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440 | #endif // LEMON_ARG_PARSER_H |
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