179
|
1 /* |
|
2 * Parser.h -- config file parser |
|
3 * |
|
4 * Copyright (c) 2011, 2012, 2013 David Demelier <markand@malikania.fr> |
|
5 * |
|
6 * Permission to use, copy, modify, and/or distribute this software for any |
|
7 * purpose with or without fee is hereby granted, provided that the above |
|
8 * copyright notice and this permission notice appear in all copies. |
|
9 * |
|
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
|
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
|
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
|
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
|
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
|
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
|
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
|
17 */ |
|
18 |
|
19 #include <iostream> |
|
20 #include <fstream> |
|
21 |
|
22 #include "Parser.h" |
|
23 |
|
24 /* -------------------------------------------------------- |
|
25 * Option public members |
|
26 * -------------------------------------------------------- */ |
|
27 |
|
28 bool operator==(const Option &o1, const Option &o2) |
|
29 { |
|
30 return o1.m_key == o2.m_key && |
|
31 o1.m_value == o2.m_value; |
|
32 } |
|
33 |
|
34 /* -------------------------------------------------------- |
|
35 * Section public members |
|
36 * -------------------------------------------------------- */ |
|
37 |
|
38 Section::Section() |
|
39 :m_allowed(true) |
|
40 { |
|
41 } |
|
42 |
|
43 Section::~Section() |
|
44 { |
|
45 } |
|
46 |
|
47 Section::Section(const Section &s) |
|
48 { |
|
49 m_name = s.m_name; |
|
50 m_options = s.m_options; |
|
51 m_allowed = s.m_allowed; |
|
52 } |
|
53 |
|
54 const std::string Section::findOption(const std::string &name) const |
|
55 { |
|
56 std::string ret; |
|
57 |
|
58 for (const Option &o : m_options) |
|
59 if (o.m_key == name) { |
|
60 ret = o.m_value; |
|
61 break; |
|
62 } |
|
63 |
|
64 return ret; |
|
65 } |
|
66 |
|
67 template <> bool Section::getOption(const std::string &name) const |
|
68 { |
|
69 bool result = false; |
|
70 |
|
71 if (hasOption(name)) { |
|
72 std::string value = findOption(name); |
|
73 |
|
74 if (value == "yes" || value == "true"|| value == "1") |
|
75 result = true; |
|
76 else if (value == "no" || value == "false" || value == "0") |
|
77 result = false; |
|
78 } |
|
79 |
|
80 return result; |
|
81 } |
|
82 |
|
83 template <> int Section::getOption(const std::string &name) const |
|
84 { |
|
85 int result = -1; |
|
86 |
|
87 if (hasOption(name)) { |
|
88 result = atoi(findOption(name).c_str()); |
|
89 } |
|
90 |
|
91 return result; |
|
92 } |
|
93 |
|
94 template <> std::string Section::getOption(const std::string &name) const |
|
95 { |
|
96 std::string result; |
|
97 |
|
98 if (hasOption(name)) |
|
99 result = findOption(name); |
|
100 |
|
101 return result; |
|
102 } |
|
103 |
|
104 const std::string & Section::getName() const |
|
105 { |
|
106 return m_name; |
|
107 } |
|
108 |
|
109 const std::vector<Option> & Section::getOptions() const |
|
110 { |
|
111 return m_options; |
|
112 } |
|
113 |
|
114 bool Section::hasOption(const std::string &name) const |
|
115 { |
|
116 for (const Option &o : m_options) |
|
117 if (o.m_key == name) |
|
118 return true; |
|
119 |
|
120 return false; |
|
121 } |
|
122 |
|
123 bool operator==(const Section &s1, const Section &s2) |
|
124 { |
|
125 if (s1.m_name != s2.m_name) |
|
126 return false; |
|
127 |
|
128 return s1.m_options == s2.m_options; |
|
129 } |
|
130 |
|
131 /* -------------------------------------------------------- |
|
132 * Parser private members |
|
133 * -------------------------------------------------------- */ |
|
134 |
|
135 void Parser::addSection(const std::string &name) |
|
136 { |
|
137 Section section; |
|
138 |
|
139 section.m_name = name; |
|
140 section.m_allowed = true; |
|
141 |
|
142 m_sections.push_back(section); |
|
143 } |
|
144 |
|
145 void Parser::addOption(const std::string &key, const std::string &value) |
|
146 { |
|
147 Option option; |
|
148 Section ¤t = m_sections.back(); |
|
149 |
|
150 option.m_key = key; |
|
151 option.m_value = value; |
|
152 |
|
153 current.m_options.push_back(option); |
|
154 } |
|
155 |
|
156 void Parser::readSection(int lineno, const std::string &line) |
|
157 { |
|
158 size_t end; |
|
159 |
|
160 if ((end = line.find_first_of(']')) != std::string::npos) { |
|
161 if (end > 1) { |
|
162 std::string name = line.substr(1, end - 1); |
|
163 |
|
164 /* |
|
165 * Check if we can add a section, if redefinition is |
|
166 * disabled, we must disable the previous section so the |
|
167 * further read options should not be enabled until |
|
168 * a correct section is found again. |
|
169 */ |
|
170 if (hasSection(name) && (m_tuning & DisableRedefinition)) { |
|
171 if (!(m_tuning & DisableVerbosity)) |
|
172 log(lineno, name, "redefinition not allowed"); |
|
173 m_sections.back().m_allowed = false; |
|
174 } else { |
|
175 addSection(name); |
|
176 } |
|
177 } else if (!(m_tuning & DisableVerbosity)) { |
|
178 /* |
|
179 * Do not add options at this step because it will |
|
180 * corrupt the previous one. |
|
181 */ |
|
182 m_sections.back().m_allowed = false; |
|
183 log(lineno, "", "empty section name"); |
|
184 } |
|
185 } |
|
186 } |
|
187 |
|
188 void Parser::readOption(int lineno, const std::string &line) |
|
189 { |
|
190 size_t epos; |
|
191 std::string key, value; |
|
192 Section ¤t = m_sections.back(); |
|
193 |
|
194 // Error on last section? |
|
195 if (!current.m_allowed) { |
|
196 /* |
|
197 * If it is the root section, this has been probably set by |
|
198 * DisableRootSection flag, otherwise an error has occured |
|
199 * so no need to log. |
|
200 */ |
|
201 if (current.m_name == "" && !(m_tuning == DisableVerbosity)) |
|
202 log(lineno, "", "option not allowed in that scope"); |
|
203 |
|
204 return; |
|
205 } |
|
206 |
|
207 if ((epos = line.find_first_of('=')) == std::string::npos) { |
|
208 if (!(m_tuning & DisableVerbosity)) |
|
209 log(lineno, current.m_name, "missing `=' keyword"); |
|
210 return; |
|
211 } |
|
212 |
|
213 if (epos > 0) { |
|
214 size_t i, begin, last; |
|
215 char c; |
|
216 |
|
217 key = line.substr(0, epos - 1); |
|
218 value = line.substr(epos + 1); |
|
219 |
|
220 // clean option key |
|
221 for (i = 0; !isspace(key[i]) && i < key.length(); ++i) |
|
222 continue; |
|
223 key = key.substr(0, i); |
|
224 |
|
225 // clean option value |
|
226 for (begin = 0; isspace(value[begin]) && begin < value.length(); ++begin) |
|
227 continue; |
|
228 value = value.substr(begin); |
|
229 |
|
230 c = value[0]; |
|
231 begin = 0; |
|
232 if (c == '\'' || c == '"') { |
|
233 for (last = begin = 1; value[last] != c && last < value.length(); ++last) |
|
234 continue; |
|
235 if (value[last] != c && !(m_tuning & DisableVerbosity)) |
|
236 if (!(m_tuning & DisableVerbosity)) |
|
237 log(lineno, current.m_name, "undisclosed std::string"); |
|
238 } else { |
|
239 for (last = begin; !isspace(value[last]) && last < value.length(); ++last) |
|
240 continue; |
|
241 } |
|
242 |
|
243 if (last - begin > 0) |
|
244 value = value.substr(begin, last - begin); |
|
245 else |
|
246 value.clear(); |
|
247 |
|
248 // Add the option if the key is not empty |
|
249 if (key.length() > 0) |
|
250 addOption(key, value); |
|
251 } |
|
252 } |
|
253 |
|
254 void Parser::readLine(int lineno, const std::string &line) |
|
255 { |
|
256 size_t i; |
|
257 std::string buffer; |
|
258 |
|
259 // Skip default spaces |
|
260 for (i = 0; isspace(line[i]) && i < line.length(); ++i) |
|
261 continue; |
|
262 |
|
263 buffer = line.substr(i); |
|
264 if (buffer.length() > 0) { |
|
265 if (buffer[0] != m_commentChar) { |
|
266 if (buffer[0] == '[') |
|
267 readSection(lineno, buffer); |
|
268 else |
|
269 readOption(lineno, buffer); |
|
270 } |
|
271 } |
|
272 } |
|
273 |
|
274 /* -------------------------------------------------------- |
|
275 * Parser public methods |
|
276 * -------------------------------------------------------- */ |
|
277 |
|
278 const char Parser::DEFAULT_COMMENT_CHAR = '#'; |
|
279 |
|
280 Parser::Parser(const std::string &path, int tuning, char commentToken) |
|
281 :m_path(path), m_tuning(tuning), m_commentChar(commentToken) |
|
282 { |
|
283 Section root; |
|
284 |
|
285 // Add a default root section |
|
286 root.m_name = ""; |
|
287 root.m_allowed = (tuning & DisableRootSection) ? false : true; |
|
288 |
|
289 m_sections.push_back(root); |
|
290 } |
|
291 |
|
292 Parser::Parser() |
|
293 { |
|
294 } |
|
295 |
|
296 Parser::~Parser() |
|
297 { |
|
298 } |
|
299 |
|
300 bool Parser::open() |
|
301 { |
|
302 std::ifstream file; |
|
303 std::string line; |
|
304 int lineno = 1; |
|
305 |
|
306 file.open(m_path.c_str()); |
|
307 if (!file.is_open()) { |
|
308 m_error = "could not open file " + m_path; // XXX: add a real error |
|
309 return false; |
|
310 } |
|
311 |
|
312 // Avoid use of C getline |
|
313 while (std::getline(file, line)) { |
|
314 readLine(lineno++, line); |
|
315 } |
|
316 |
|
317 file.close(); |
|
318 |
|
319 return true; |
|
320 } |
|
321 |
|
322 const std::string & Parser::getError() const |
|
323 { |
|
324 return m_error; |
|
325 } |
|
326 |
|
327 const std::vector<Section> & Parser::getSections() const |
|
328 { |
|
329 return m_sections; |
|
330 } |
|
331 |
|
332 std::vector<Section> Parser::findSections(const std::string &name) const |
|
333 { |
|
334 std::vector<Section> list; |
|
335 |
|
336 for (const Section &s : m_sections) { |
|
337 if (s.m_name == name) { |
|
338 Section copy = s; |
|
339 list.push_back(copy); |
|
340 } |
|
341 } |
|
342 |
|
343 return list; |
|
344 } |
|
345 |
|
346 bool Parser::hasSection(const std::string &name) const |
|
347 { |
|
348 for (const Section &s : m_sections) |
|
349 if (s.m_name == name) |
|
350 return true; |
|
351 |
|
352 return false; |
|
353 } |
|
354 |
|
355 Section Parser::getSection(const std::string &name) const |
|
356 { |
|
357 Section ret; |
|
358 |
|
359 for (const Section &s : m_sections) |
|
360 if (s.m_name == name) |
|
361 ret = s; |
|
362 |
|
363 return ret; |
|
364 } |
|
365 |
|
366 Section Parser::requireSection(const std::string &name) const |
|
367 { |
|
368 if (!hasSection(name)) |
|
369 throw NotFoundException(name); |
|
370 |
|
371 return getSection(name); |
|
372 } |
|
373 |
|
374 void Parser::log(int number, const std::string &, const std::string &message) |
|
375 { |
|
376 std::cout << "line " << number << ": " << message << std::endl; |
|
377 } |
|
378 |
|
379 void Parser::dump() |
|
380 { |
|
381 for (auto s : m_sections) { |
|
382 dumpSection(s); |
|
383 for (auto o : s.m_options) |
|
384 dumpOption(o); |
|
385 } |
|
386 } |
|
387 |
|
388 void Parser::dumpSection(const Section §ion) |
|
389 { |
|
390 std::cout << "Section " << section.m_name << std::endl; |
|
391 } |
|
392 |
|
393 void Parser::dumpOption(const Option &option) |
|
394 { |
|
395 std::cout << " Option " << option.m_key << " = " << option.m_value << std::endl; |
|
396 } |