1 | /* -*- mode: C++; indent-tabs-mode: nil; -*- |
---|
2 | * |
---|
3 | * This file is a part of LEMON, a generic C++ optimization library. |
---|
4 | * |
---|
5 | * Copyright (C) 2003-2009 |
---|
6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
---|
7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
---|
8 | * |
---|
9 | * Permission to use, modify and distribute this software is granted |
---|
10 | * provided that this copyright notice appears in all copies. For |
---|
11 | * precise terms see the accompanying LICENSE file. |
---|
12 | * |
---|
13 | * This software is provided "AS IS" with no warranty of any kind, |
---|
14 | * express or implied, and with no claim as to its suitability for any |
---|
15 | * purpose. |
---|
16 | * |
---|
17 | */ |
---|
18 | |
---|
19 | #ifndef LEMON_ARG_PARSER_H |
---|
20 | #define LEMON_ARG_PARSER_H |
---|
21 | |
---|
22 | #include <vector> |
---|
23 | #include <map> |
---|
24 | #include <list> |
---|
25 | #include <string> |
---|
26 | #include <iostream> |
---|
27 | #include <sstream> |
---|
28 | #include <algorithm> |
---|
29 | #include <lemon/assert.h> |
---|
30 | |
---|
31 | ///\ingroup misc |
---|
32 | ///\file |
---|
33 | ///\brief A tool to parse command line arguments. |
---|
34 | |
---|
35 | namespace lemon { |
---|
36 | |
---|
37 | ///Command line arguments parser |
---|
38 | |
---|
39 | ///\ingroup misc |
---|
40 | ///Command line arguments parser. |
---|
41 | /// |
---|
42 | ///For a complete example see the \ref arg_parser_demo.cc demo file. |
---|
43 | class ArgParser { |
---|
44 | |
---|
45 | static void _showHelp(void *p); |
---|
46 | protected: |
---|
47 | |
---|
48 | int _argc; |
---|
49 | const char * const *_argv; |
---|
50 | |
---|
51 | enum OptType { UNKNOWN=0, BOOL=1, STRING=2, DOUBLE=3, INTEGER=4, FUNC=5 }; |
---|
52 | |
---|
53 | class ParData { |
---|
54 | public: |
---|
55 | union { |
---|
56 | bool *bool_p; |
---|
57 | int *int_p; |
---|
58 | double *double_p; |
---|
59 | std::string *string_p; |
---|
60 | struct { |
---|
61 | void (*p)(void *); |
---|
62 | void *data; |
---|
63 | } func_p; |
---|
64 | |
---|
65 | }; |
---|
66 | std::string help; |
---|
67 | bool mandatory; |
---|
68 | OptType type; |
---|
69 | bool set; |
---|
70 | bool ingroup; |
---|
71 | bool has_syn; |
---|
72 | bool syn; |
---|
73 | bool self_delete; |
---|
74 | ParData() : mandatory(false), type(UNKNOWN), set(false), ingroup(false), |
---|
75 | has_syn(false), syn(false), self_delete(false) {} |
---|
76 | }; |
---|
77 | |
---|
78 | typedef std::map<std::string,ParData> Opts; |
---|
79 | Opts _opts; |
---|
80 | |
---|
81 | class GroupData |
---|
82 | { |
---|
83 | public: |
---|
84 | typedef std::list<std::string> Opts; |
---|
85 | Opts opts; |
---|
86 | bool only_one; |
---|
87 | bool mandatory; |
---|
88 | GroupData() :only_one(false), mandatory(false) {} |
---|
89 | }; |
---|
90 | |
---|
91 | typedef std::map<std::string,GroupData> Groups; |
---|
92 | Groups _groups; |
---|
93 | |
---|
94 | struct OtherArg |
---|
95 | { |
---|
96 | std::string name; |
---|
97 | std::string help; |
---|
98 | OtherArg(std::string n, std::string h) :name(n), help(h) {} |
---|
99 | |
---|
100 | }; |
---|
101 | |
---|
102 | std::vector<OtherArg> _others_help; |
---|
103 | std::vector<std::string> _file_args; |
---|
104 | std::string _command_name; |
---|
105 | |
---|
106 | |
---|
107 | private: |
---|
108 | //Bind a function to an option. |
---|
109 | |
---|
110 | //\param name The name of the option. The leading '-' must be omitted. |
---|
111 | //\param help A help string. |
---|
112 | //\retval func The function to be called when the option is given. It |
---|
113 | // must be of type "void f(void *)" |
---|
114 | //\param data Data to be passed to \c func |
---|
115 | ArgParser &funcOption(const std::string &name, |
---|
116 | const std::string &help, |
---|
117 | void (*func)(void *),void *data); |
---|
118 | |
---|
119 | public: |
---|
120 | |
---|
121 | ///Constructor |
---|
122 | ArgParser(int argc, const char * const *argv); |
---|
123 | |
---|
124 | ~ArgParser(); |
---|
125 | |
---|
126 | ///\name Options |
---|
127 | /// |
---|
128 | |
---|
129 | ///@{ |
---|
130 | |
---|
131 | ///Add a new integer type option |
---|
132 | |
---|
133 | ///Add a new integer type option. |
---|
134 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
135 | ///\param help A help string. |
---|
136 | ///\param value A default value for the option. |
---|
137 | ///\param obl Indicate if the option is mandatory. |
---|
138 | ArgParser &intOption(const std::string &name, |
---|
139 | const std::string &help, |
---|
140 | int value=0, bool obl=false); |
---|
141 | |
---|
142 | ///Add a new floating point type option |
---|
143 | |
---|
144 | ///Add a new floating point type option. |
---|
145 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
146 | ///\param help A help string. |
---|
147 | ///\param value A default value for the option. |
---|
148 | ///\param obl Indicate if the option is mandatory. |
---|
149 | ArgParser &doubleOption(const std::string &name, |
---|
150 | const std::string &help, |
---|
151 | double value=0, bool obl=false); |
---|
152 | |
---|
153 | ///Add a new bool type option |
---|
154 | |
---|
155 | ///Add a new bool type option. |
---|
156 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
157 | ///\param help A help string. |
---|
158 | ///\param value A default value for the option. |
---|
159 | ///\param obl Indicate if the option is mandatory. |
---|
160 | ///\note A mandatory bool obtion is of very little use. |
---|
161 | ArgParser &boolOption(const std::string &name, |
---|
162 | const std::string &help, |
---|
163 | bool value=false, bool obl=false); |
---|
164 | |
---|
165 | ///Add a new string type option |
---|
166 | |
---|
167 | ///Add a new string type option. |
---|
168 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
169 | ///\param help A help string. |
---|
170 | ///\param value A default value for the option. |
---|
171 | ///\param obl Indicate if the option is mandatory. |
---|
172 | ArgParser &stringOption(const std::string &name, |
---|
173 | const std::string &help, |
---|
174 | std::string value="", bool obl=false); |
---|
175 | |
---|
176 | ///Give help string for non-parsed arguments. |
---|
177 | |
---|
178 | ///With this function you can give help string for non-parsed arguments. |
---|
179 | ///The parameter \c name will be printed in the short usage line, while |
---|
180 | ///\c help gives a more detailed description. |
---|
181 | ArgParser &other(const std::string &name, |
---|
182 | const std::string &help=""); |
---|
183 | |
---|
184 | ///@} |
---|
185 | |
---|
186 | ///\name Options with External Storage |
---|
187 | ///Using this functions, the value of the option will be directly written |
---|
188 | ///into a variable once the option appears in the command line. |
---|
189 | |
---|
190 | ///@{ |
---|
191 | |
---|
192 | ///Add a new integer type option with a storage reference |
---|
193 | |
---|
194 | ///Add a new integer type option with a storage reference. |
---|
195 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
196 | ///\param help A help string. |
---|
197 | ///\param obl Indicate if the option is mandatory. |
---|
198 | ///\retval ref The value of the argument will be written to this variable. |
---|
199 | ArgParser &refOption(const std::string &name, |
---|
200 | const std::string &help, |
---|
201 | int &ref, bool obl=false); |
---|
202 | |
---|
203 | ///Add a new floating type option with a storage reference |
---|
204 | |
---|
205 | ///Add a new floating type option with a storage reference. |
---|
206 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
207 | ///\param help A help string. |
---|
208 | ///\param obl Indicate if the option is mandatory. |
---|
209 | ///\retval ref The value of the argument will be written to this variable. |
---|
210 | ArgParser &refOption(const std::string &name, |
---|
211 | const std::string &help, |
---|
212 | double &ref, bool obl=false); |
---|
213 | |
---|
214 | ///Add a new bool type option with a storage reference |
---|
215 | |
---|
216 | ///Add a new bool type option with a storage reference. |
---|
217 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
218 | ///\param help A help string. |
---|
219 | ///\param obl Indicate if the option is mandatory. |
---|
220 | ///\retval ref The value of the argument will be written to this variable. |
---|
221 | ///\note A mandatory bool obtion is of very little use. |
---|
222 | ArgParser &refOption(const std::string &name, |
---|
223 | const std::string &help, |
---|
224 | bool &ref, bool obl=false); |
---|
225 | |
---|
226 | ///Add a new string type option with a storage reference |
---|
227 | |
---|
228 | ///Add a new string type option with a storage reference. |
---|
229 | ///\param name The name of the option. The leading '-' must be omitted. |
---|
230 | ///\param help A help string. |
---|
231 | ///\param obl Indicate if the option is mandatory. |
---|
232 | ///\retval ref The value of the argument will be written to this variable. |
---|
233 | ArgParser &refOption(const std::string &name, |
---|
234 | const std::string &help, |
---|
235 | std::string &ref, bool obl=false); |
---|
236 | |
---|
237 | ///@} |
---|
238 | |
---|
239 | ///\name Option Groups and Synonyms |
---|
240 | /// |
---|
241 | |
---|
242 | ///@{ |
---|
243 | |
---|
244 | ///Bundle some options into a group |
---|
245 | |
---|
246 | /// You can group some option by calling this function repeatedly for each |
---|
247 | /// option to be grouped with the same groupname. |
---|
248 | ///\param group The group name. |
---|
249 | ///\param opt The option name. |
---|
250 | ArgParser &optionGroup(const std::string &group, |
---|
251 | const std::string &opt); |
---|
252 | |
---|
253 | ///Make the members of a group exclusive |
---|
254 | |
---|
255 | ///If you call this function for a group, than at most one of them can be |
---|
256 | ///given at the same time. |
---|
257 | ArgParser &onlyOneGroup(const std::string &group); |
---|
258 | |
---|
259 | ///Make a group mandatory |
---|
260 | |
---|
261 | ///Using this function, at least one of the members of \c group |
---|
262 | ///must be given. |
---|
263 | ArgParser &mandatoryGroup(const std::string &group); |
---|
264 | |
---|
265 | ///Create synonym to an option |
---|
266 | |
---|
267 | ///With this function you can create a synonym \c syn of the |
---|
268 | ///option \c opt. |
---|
269 | ArgParser &synonym(const std::string &syn, |
---|
270 | const std::string &opt); |
---|
271 | |
---|
272 | ///@} |
---|
273 | |
---|
274 | private: |
---|
275 | void show(std::ostream &os,Opts::const_iterator i) const; |
---|
276 | void show(std::ostream &os,Groups::const_iterator i) const; |
---|
277 | void showHelp(Opts::const_iterator i) const; |
---|
278 | void showHelp(std::vector<OtherArg>::const_iterator i) const; |
---|
279 | |
---|
280 | void unknownOpt(std::string arg) const; |
---|
281 | |
---|
282 | void requiresValue(std::string arg, OptType t) const; |
---|
283 | void checkMandatories() const; |
---|
284 | |
---|
285 | void shortHelp() const; |
---|
286 | void showHelp() const; |
---|
287 | public: |
---|
288 | |
---|
289 | ///Start the parsing process |
---|
290 | ArgParser &parse(); |
---|
291 | |
---|
292 | /// Synonym for parse() |
---|
293 | ArgParser &run() |
---|
294 | { |
---|
295 | return parse(); |
---|
296 | } |
---|
297 | |
---|
298 | ///Give back the command name (the 0th argument) |
---|
299 | const std::string &commandName() const { return _command_name; } |
---|
300 | |
---|
301 | ///Check if an opion has been given to the command. |
---|
302 | bool given(std::string op) const |
---|
303 | { |
---|
304 | Opts::const_iterator i = _opts.find(op); |
---|
305 | return i!=_opts.end()?i->second.set:false; |
---|
306 | } |
---|
307 | |
---|
308 | |
---|
309 | ///Magic type for operator[] |
---|
310 | |
---|
311 | ///This is the type of the return value of ArgParser::operator[](). |
---|
312 | ///It automatically converts to \c int, \c double, \c bool or |
---|
313 | ///\c std::string if the type of the option matches, which is checked |
---|
314 | ///with an \ref LEMON_ASSERT "assertion" (i.e. it performs runtime |
---|
315 | ///type checking). |
---|
316 | class RefType |
---|
317 | { |
---|
318 | const ArgParser &_parser; |
---|
319 | std::string _name; |
---|
320 | public: |
---|
321 | ///\e |
---|
322 | RefType(const ArgParser &p,const std::string &n) :_parser(p),_name(n) {} |
---|
323 | ///\e |
---|
324 | operator bool() |
---|
325 | { |
---|
326 | Opts::const_iterator i = _parser._opts.find(_name); |
---|
327 | LEMON_ASSERT(i!=_parser._opts.end(), |
---|
328 | std::string()+"Unkown option: '"+_name+"'"); |
---|
329 | LEMON_ASSERT(i->second.type==ArgParser::BOOL, |
---|
330 | std::string()+"'"+_name+"' is a bool option"); |
---|
331 | return *(i->second.bool_p); |
---|
332 | } |
---|
333 | ///\e |
---|
334 | operator std::string() |
---|
335 | { |
---|
336 | Opts::const_iterator i = _parser._opts.find(_name); |
---|
337 | LEMON_ASSERT(i!=_parser._opts.end(), |
---|
338 | std::string()+"Unkown option: '"+_name+"'"); |
---|
339 | LEMON_ASSERT(i->second.type==ArgParser::STRING, |
---|
340 | std::string()+"'"+_name+"' is a string option"); |
---|
341 | return *(i->second.string_p); |
---|
342 | } |
---|
343 | ///\e |
---|
344 | operator double() |
---|
345 | { |
---|
346 | Opts::const_iterator i = _parser._opts.find(_name); |
---|
347 | LEMON_ASSERT(i!=_parser._opts.end(), |
---|
348 | std::string()+"Unkown option: '"+_name+"'"); |
---|
349 | LEMON_ASSERT(i->second.type==ArgParser::DOUBLE || |
---|
350 | i->second.type==ArgParser::INTEGER, |
---|
351 | std::string()+"'"+_name+"' is a floating point option"); |
---|
352 | return i->second.type==ArgParser::DOUBLE ? |
---|
353 | *(i->second.double_p) : *(i->second.int_p); |
---|
354 | } |
---|
355 | ///\e |
---|
356 | operator int() |
---|
357 | { |
---|
358 | Opts::const_iterator i = _parser._opts.find(_name); |
---|
359 | LEMON_ASSERT(i!=_parser._opts.end(), |
---|
360 | std::string()+"Unkown option: '"+_name+"'"); |
---|
361 | LEMON_ASSERT(i->second.type==ArgParser::INTEGER, |
---|
362 | std::string()+"'"+_name+"' is an integer option"); |
---|
363 | return *(i->second.int_p); |
---|
364 | } |
---|
365 | |
---|
366 | }; |
---|
367 | |
---|
368 | ///Give back the value of an option |
---|
369 | |
---|
370 | ///Give back the value of an option. |
---|
371 | ///\sa RefType |
---|
372 | RefType operator[](const std::string &n) const |
---|
373 | { |
---|
374 | return RefType(*this, n); |
---|
375 | } |
---|
376 | |
---|
377 | ///Give back the non-option type arguments. |
---|
378 | |
---|
379 | ///Give back a reference to a vector consisting of the program arguments |
---|
380 | ///not starting with a '-' character. |
---|
381 | const std::vector<std::string> &files() const { return _file_args; } |
---|
382 | |
---|
383 | }; |
---|
384 | } |
---|
385 | |
---|
386 | #endif // LEMON_ARG_PARSER_H |
---|