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1 | #include "configuration_manager.hh" |
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2 | #include <stdio.h> |
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3 | #include <stdlib.h> |
4 | #include <fcntl.h> |
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5 | |
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6 | #define MAX_LINE_LENGTH 80 |
7 | |
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8 | /*! |
9 | *\brief Constructor. |
10 | * |
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11 | * This constructor makes a new configuration_manager ready to use. |
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12 | *\arg name Name of the application as mentioned in the |
13 | * "Use: <appname> ..." help message. |
14 | */ |
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15 | configuration_manager::configuration_manager(string name){ |
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16 | app_name=name; |
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17 | } |
18 | |
19 | |
20 | /*! |
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21 | *\brief Add a new configuration value to be searched for. |
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22 | *\param shortname A character for the short form. |
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23 | * For example the o in -o |
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24 | *\param longname The double dash longname. For example |
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25 | * output_file in --output_file= |
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26 | *\param description A detailed description of the value. |
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27 | *\param status Pointer to an integer. Will be set to 1 if arg found. |
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28 | *\target Pointer to string to put the value in. |
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29 | *\placeholder A placeholder for the documentation. |
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30 | * For example <filename> in -f<filename> |
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31 | */ |
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32 | void configuration_manager::add_option_value (const string & shortname, |
33 | const string & longname, |
34 | const string & description, |
35 | int * status, |
36 | string * target, |
37 | const string & placeholder, |
38 | const bool & allow_cmdline, |
39 | const bool & allow_conffile |
40 | ){ |
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41 | |
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42 | if(status!=NULL) if (target!=NULL) |
43 | option_values.insert(option_values.end(), |
44 | opt_value_t(shortname, |
45 | longname, |
46 | description, |
47 | status, |
48 | target, |
49 | placeholder, |
50 | allow_cmdline, |
51 | allow_conffile |
52 | ) |
53 | ); |
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54 | } |
55 | |
56 | |
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57 | |
58 | /*! |
59 | *\brief Add a new configuration switch to be searched for. |
60 | *\param shortname A character for the short form. |
61 | * For example the h in -h |
62 | *\param longname The double dash longname. For example |
63 | * help in --help |
64 | *\param description A detailed description of the value. |
65 | *\param status Pointer to an integer. Will be set to 1 if arg found. |
66 | *\param allow_cmdline Specifies whether the switch is acceptable on the |
67 | * command line. |
68 | *\param allow_conffile Specifies whether the switch is acceptable |
69 | * in a configuration file. |
70 | */ |
71 | void configuration_manager::add_option_switch (const string & shortname, |
72 | const string & longname, |
73 | const string & description, |
74 | int * status, |
75 | const bool & allow_cmdline, |
76 | const bool & allow_conffile |
77 | ){ |
78 | |
79 | if(status!=NULL) |
80 | option_switches.insert(option_switches.end(), |
81 | opt_switch_t(shortname, |
82 | longname, |
83 | description, |
84 | status, |
85 | allow_cmdline, |
86 | allow_conffile) |
87 | ); |
88 | } |
89 | |
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90 | /*! |
91 | *\brief Add an accepted argument to the argument reader. |
92 | *\param placeholder Something like "<input-file>". |
93 | *\param description Text describing the argument. |
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94 | *\param status A pointer to a status variable. Will be set to 0 by default. |
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95 | * If the argument is filled in, it will be set to 1. |
96 | *\param target A pointer to a c++ string where the argument goes to. |
97 | * |
98 | *\note Arguments are filled in the order of adding them to the |
99 | * argument reader. |
100 | * There would be no other way to determine the order. |
101 | */ |
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102 | void configuration_manager::add_argument(const string & description, |
103 | int * status, |
104 | string * target, |
105 | const string & placeholder){ |
106 | |
107 | |
108 | |
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109 | if (target!=NULL) if(status!=NULL) |
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110 | cmd_args.insert(cmd_args.end(),cmd_arg_t(placeholder, |
111 | description, |
112 | status, |
113 | target)); |
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114 | } |
115 | |
116 | |
117 | /*! |
118 | *\Read in the args passed to main(). |
119 | *\returns empty vector on success or the error messages to be output. |
120 | */ |
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121 | vector<string> configuration_manager::read_args(int argc, char ** args){ |
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122 | |
123 | vector<string> messages; |
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124 | vector<string> argv; |
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125 | |
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126 | // First we make a C++ string vector out of the **argv. |
127 | for (char ** akt=args+1; *akt ;akt++) argv.insert(argv.end(),string(*akt)); |
128 | |
129 | // Counter for the free command line parameters. |
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130 | unsigned int free_parms_count=0; |
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131 | |
132 | // Loop through the command line arguments |
133 | for (unsigned int arg_no=0;arg_no<argv.size();arg_no++){ |
134 | bool found=false; |
135 | string argstring; |
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136 | |
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137 | // Look for long parameters. |
138 | if ((argv[arg_no].substr(0,2)=="--")&&(free_parms_count==0)){ |
139 | argstring=argv[arg_no].substr(2); |
140 | |
141 | // Look for long switches. |
142 | for (unsigned int switch_no=0;switch_no<option_switches.size();switch_no++){ |
143 | string switch_name=option_switches[switch_no].longname; |
144 | if (argstring.compare(0,switch_name.length(),switch_name,0,switch_name.length())==0){ |
145 | string value=analyse_string(argstring); |
146 | bool result=analyse_bool(value); |
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147 | if(option_switches[switch_no].allow_cmdline==true){ |
148 | *(option_switches[switch_no].status)=result; |
149 | }else{ |
150 | messages.insert(messages.end(),"Switch \"--" |
151 | +option_switches[switch_no].longname |
152 | +"\" is not allowed on the command line!"); |
153 | } |
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154 | found=true; |
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155 | break; |
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156 | } |
157 | } |
158 | |
159 | // Look for long values. |
160 | for (unsigned int value_no=0;value_no<option_values.size();value_no++){ |
161 | string value_name=option_values[value_no].longname; |
162 | if (argstring.compare(0,value_name.length(),value_name,0,value_name.length())==0){ |
163 | string value=analyse_string(argstring); |
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164 | if(option_values[value_no].allow_cmdline==true){ |
165 | *(option_values[value_no].status)=1; |
166 | *(option_values[value_no].target)=value; |
167 | }else{ |
168 | messages.insert(messages.end(),"Option value \"--" |
169 | +option_values[value_no].longname |
170 | +"\" is not allowed on the command line!"); |
171 | } |
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172 | found=true; |
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173 | break; |
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174 | } |
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175 | } |
176 | if (! found) { |
177 | messages.insert(messages.begin(),"Unknown option: --"+argstring+"!"); |
178 | found=true; // Oh! |
179 | } |
180 | } |
181 | |
182 | // Look for short parameters |
183 | if ((argv[arg_no].substr(0,1)=="-")&&(free_parms_count==0)&&(!found)){ // Short parameters |
184 | found=true; |
185 | argstring=argv[arg_no].substr(1); // Reassign, with one more character now |
186 | for (unsigned int pos=0;pos < argstring.length();pos++){ |
187 | bool short_found=false; |
188 | |
189 | // First, find short switches |
190 | for (unsigned int switch_no=0;switch_no<option_switches.size();switch_no++){ |
191 | string short_name=option_switches[switch_no].shortname; |
192 | if (short_name.compare(0,short_name.length(),argstring,pos,short_name.length())==0){ |
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193 | if(option_switches[switch_no].allow_cmdline==true){ |
194 | *(option_switches[switch_no].status)=1; |
195 | }else{ |
196 | messages.insert(messages.end(),"Switch \"-" |
197 | +option_switches[switch_no].shortname |
198 | +"\" is not allowed on the command line!"); |
199 | } |
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200 | short_found=true; |
201 | pos+=short_name.length()-1; |
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202 | break; |
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203 | } |
204 | } |
205 | |
206 | // Now, find short values |
207 | if (!short_found){ |
208 | for (unsigned int value_no=0;value_no<option_values.size();value_no++){ |
209 | string short_name=option_values[value_no].shortname; |
210 | |
211 | if (short_name.compare(0,short_name.length(),argstring,pos,short_name.length())==0){ |
212 | if (pos==argstring.length()-1){ // Last character, where's the value? |
213 | if (arg_no<argv.size()-1){ // Take next complete argument as value! |
214 | *(option_values[value_no].status)=1; |
215 | *(option_values[value_no].target)=argv[arg_no+1]; |
216 | arg_no+=1; // Consume the next argument |
217 | short_found=true; |
218 | } else { // No argument left! |
219 | messages.insert(messages.begin(),"Missing value for -"+short_name+"!"); |
220 | short_found=true; |
221 | } |
222 | } else { |
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223 | if(option_values[value_no].allow_cmdline==true){ |
224 | *(option_values[value_no].status)=1; |
225 | *(option_values[value_no].target)=argstring.substr(pos+1); |
226 | }else{ |
227 | messages.insert(messages.end(),"Option value \"-" |
228 | +option_values[value_no].shortname |
229 | +"\" is not allowed on the command line!"); |
230 | } |
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231 | pos=argstring.length(); // Do not analyse other characters. |
232 | short_found=true; |
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233 | break; |
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234 | } |
235 | } |
236 | } |
237 | } |
238 | if (!short_found) messages.insert(messages.begin(),"Unknown Option: -"+argstring.substr(pos,1)+"!"); |
239 | } |
240 | } |
241 | |
242 | if (!found) { // Must be a free form parameter... |
243 | if (free_parms_count<cmd_args.size()){ // Space available |
244 | *(cmd_args[free_parms_count].target)=argv[arg_no]; |
245 | *(cmd_args[free_parms_count].status)=1; |
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246 | free_parms_count++; |
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247 | } else { // No more space for free form parameters! |
248 | messages.insert(messages.begin(),"Too many arguments!"); |
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249 | } |
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250 | } |
251 | } |
252 | if (!messages.empty()){ |
253 | messages.insert(messages.begin(),"Error!"); |
254 | messages.insert(messages.begin(),""); |
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255 | } |
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256 | return messages; |
257 | } |
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258 | |
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259 | |
260 | /*! |
261 | *\brief Extract a value from a configuration file line or |
262 | * a command line argument |
263 | */ |
264 | string configuration_manager::analyse_string(const string & line){ |
265 | string result=""; |
266 | unsigned int pos=line.find("="); |
267 | if (pos!=string::npos) result=line.substr(pos+1); |
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268 | return result; |
269 | } |
270 | |
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271 | /*! |
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272 | *\brief Extract a boolean value out of a string, defaulting to true |
273 | * |
274 | * Used for commandline switches |
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275 | */ |
276 | bool configuration_manager::analyse_bool(const string & data){ |
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277 | if ((data.find("false",0)!=string::npos)|| |
278 | (data.find("0",0)!=string::npos)|| |
279 | (data.find("no",0)!=string::npos)) return false; |
280 | else return true; |
281 | } |
282 | |
283 | |
284 | /*! |
285 | *\brief Extract a boolean value out of a string, defaulting to false |
286 | * |
287 | * Used for configuration file switches |
288 | */ |
289 | bool configuration_manager::analyse_bool_false(const string & data){ |
290 | if ((data.find("true",0)!=string::npos)|| |
291 | (data.find("1",0)!=string::npos)|| |
292 | (data.find("yes",0)!=string::npos)) return true; |
293 | else return false; |
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294 | } |
295 | |
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296 | |
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297 | /*! |
298 | *brief Read in and parse a configuration file. |
299 | *\arg file String containing the filename |
300 | *\return Empty Vector or Vector full of strings containing |
301 | * the error message(s). |
302 | */ |
303 | vector<string> configuration_manager::read_file(string filename){ |
304 | vector<string>result; |
305 | FILE * fp=fopen(filename.c_str(),"r"); |
306 | if (! fp) { |
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307 | result.insert(result.end(),"Could not open file: "+filename); |
308 | } else { |
309 | char buffer[1000]; |
310 | while(fgets(buffer,1000,fp)){ |
311 | if (buffer[strlen(buffer)-1]=='\n')// Cut trailing newline |
312 | buffer[strlen(buffer)-1]=0; |
313 | if (strlen (buffer)){ |
314 | char*l2=buffer+strspn(buffer," \t"); |
315 | if (l2[0]!='#'){ |
316 | string argstring=l2; |
317 | unsigned int pos=argstring.find("="); |
318 | if (pos==0){ |
319 | result.insert(result.end(),"In File "+filename+": Line beginning with '='!"); |
320 | } |
321 | |
322 | bool found=false; |
323 | |
324 | // Look for long switches. |
325 | for (unsigned int switch_no=0;switch_no<option_switches.size();switch_no++){ |
326 | string switch_name=option_switches[switch_no].longname; |
327 | if (argstring.compare(0,switch_name.length(),switch_name,0,switch_name.length())==0){ |
328 | string value=analyse_string(argstring); |
329 | //result.insert(result.end(),"argstring:\""+argstring+"\""); |
330 | bool res=analyse_bool_false(value); |
331 | if(option_switches[switch_no].allow_conffile==true){ |
332 | *(option_switches[switch_no].status)=res; |
333 | }else{ |
334 | result.insert(result.end(),"In File "+filename+": Switch \"" |
335 | +option_switches[switch_no].longname |
336 | +"\" is not allowed in config files!"); |
337 | } |
338 | found=true; |
339 | break; |
340 | } |
341 | } |
342 | |
343 | // Look for long values. |
344 | for (unsigned int value_no=0;value_no<option_values.size();value_no++){ |
345 | string value_name=option_values[value_no].longname; |
346 | if (argstring.compare(0,value_name.length(),value_name,0,value_name.length())==0){ |
347 | string value=analyse_string(argstring); |
348 | *(option_values[value_no].status)=1; |
349 | |
350 | if(option_values[value_no].allow_conffile==true){ |
351 | *(option_values[value_no].status)=1; |
352 | *(option_values[value_no].target)=value; |
353 | }else{ |
354 | result.insert(result.end(),"In File "+filename+": Option value \"" |
355 | +option_values[value_no].longname |
356 | +"\" is not allowed in config files!"); |
357 | } |
358 | found=true; |
359 | break; |
360 | } |
361 | } |
362 | if (! found) { |
363 | result.insert(result.end(),"In File "+filename+": Unknown option: "+argstring+"!"); |
364 | } |
365 | |
366 | } // if not # |
367 | } // if (strlen()) |
368 | } // while(...) |
369 | fclose (fp); |
370 | } // fp==0 else branch |
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371 | |
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372 | if (!result.empty()){ |
373 | result.insert(result.begin(),"Error!"); |
374 | result.insert(result.begin(),""); |
375 | } |
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376 | return result; |
377 | } |
378 | |
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379 | |
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380 | /*! |
381 | *\brief Generate help. |
382 | *\arg target Reference to a vector<string> to which lots of helpful |
383 | * strings are appended. |
384 | */ |
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385 | void configuration_manager::get_help(vector<string> & target){ |
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386 | target.insert(target.end(),""); |
387 | string line="Usage: "+app_name; |
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388 | |
389 | for (vector<opt_switch_t>::iterator parm_p=option_switches.begin();parm_p<option_switches.end();parm_p++){ |
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390 | string addstr=" [-"+parm_p->shortname; |
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391 | addstr+="]"; |
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392 | if (line.length()+addstr.length()>MAX_LINE_LENGTH){ |
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393 | target.insert(target.end(),line); |
394 | line=string(7+app_name.length(),' '); |
395 | } |
396 | line+=addstr; |
397 | } |
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398 | |
399 | for (vector<opt_value_t>::iterator parm_p=option_values.begin();parm_p<option_values.end();parm_p++){ |
400 | string addstr=" [-"+parm_p->shortname; |
401 | addstr+=parm_p->placeholder; |
402 | addstr+="]"; |
403 | if (line.length()+addstr.length()>MAX_LINE_LENGTH){ |
404 | target.insert(target.end(),line); |
405 | line=string(7+app_name.length(),' '); |
406 | } |
407 | line+=addstr; |
408 | } |
409 | |
410 | for (vector<cmd_arg_t>::iterator parm_p=cmd_args.begin();parm_p<cmd_args.end();parm_p++){ |
411 | if (line.length()+parm_p->placeholder.length()>MAX_LINE_LENGTH){ |
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412 | target.insert(target.end(),line); |
413 | line=string(7+app_name.length(),' '); |
414 | } |
415 | line+=" ["+parm_p->placeholder+"]"; |
416 | } |
417 | target.insert(target.end(),line); |
418 | |
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419 | /* Here comes the documentation output. */ |
420 | |
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421 | vector<string> left,right; |
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422 | unsigned int max_width; |
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423 | |
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424 | /* Output switches? */ |
425 | if (option_switches.size()){ |
426 | target.insert(target.end(),""); |
427 | target.insert(target.end(),"Switches:"); |
428 | |
429 | left=vector<string>(); |
430 | right=vector<string>(); |
431 | max_width=0; |
432 | |
433 | /* Now lets insert switches into left and right */ |
434 | for (unsigned int sw=0; sw<option_switches.size();sw++){ |
435 | opt_switch_t akt_sw=option_switches[sw]; |
436 | string rline=akt_sw.description; |
437 | string lline="-"+akt_sw.shortname+", --"+akt_sw.longname; |
438 | left.insert(left.end(),lline); |
439 | right.insert(right.end(),rline); |
440 | } |
441 | |
442 | // Determine maximal width for left column |
443 | max_width=0; |
444 | for (unsigned int c=0; c<left.size();c++) |
445 | if(left[c].length()>max_width) max_width=left[c].length(); |
446 | |
447 | /* output all the mess */ |
448 | for (unsigned int c=0; c<left.size();c++){ |
449 | string nl(max_width,' '); |
450 | nl.replace(0,left[c].length(),left[c]); |
451 | nl+=" "+right[c]; |
452 | while (nl.length()>80){ // Too long??? |
453 | int limit=nl.find_last_of(' ',MAX_LINE_LENGTH+1); |
454 | target.insert(target.end(),nl.substr(0,limit)); |
455 | nl=string(max_width+2,' ')+nl.substr(limit+1); |
456 | } |
457 | target.insert(target.end(),nl); |
458 | } |
ad324d29 |
459 | } |
460 | |
909d3603 |
461 | // Output values |
462 | if (option_values.size()){ |
ad324d29 |
463 | target.insert(target.end(),""); |
909d3603 |
464 | target.insert(target.end(),"Option values:"); |
465 | |
466 | left=vector<string>(); |
467 | right=vector<string>(); |
468 | max_width=0; |
469 | |
470 | for (unsigned int val=0; val<option_values.size();val++){ |
471 | opt_value_t akt_val=option_values[val]; |
472 | string rline=akt_val.description; |
473 | string lline=" -"+akt_val.shortname+akt_val.placeholder+", --"+ |
fed2c751 |
474 | akt_val.longname+"="+akt_val.placeholder; |
909d3603 |
475 | left.insert(left.end(),lline); |
476 | right.insert(right.end(),rline); |
477 | } |
478 | |
479 | // Determine maximal width for left column |
480 | for (unsigned int c=0; c<left.size();c++) |
481 | if(left[c].length()>max_width) max_width=left[c].length(); |
482 | /* output all the mess */ |
483 | for (unsigned int c=0; c<left.size();c++){ |
484 | string nl(max_width,' '); |
485 | nl.replace(0,left[c].length(),left[c]); |
486 | nl+=" "+right[c]; |
487 | while (nl.length()>80){ // Too long??? |
488 | int limit=nl.find_last_of(' ',MAX_LINE_LENGTH+1); |
489 | target.insert(target.end(),nl.substr(0,limit)); |
490 | nl=string(max_width+2,' ')+nl.substr(limit+1); |
491 | } |
492 | target.insert(target.end(),nl); |
493 | } |
ad324d29 |
494 | } |
495 | |
909d3603 |
496 | /* Output the Arguments */ |
497 | if (cmd_args.size()){ |
ad324d29 |
498 | target.insert(target.end(),""); |
499 | target.insert(target.end(),"Arguments:"); |
ad324d29 |
500 | |
909d3603 |
501 | left=vector<string>(); |
502 | right=vector<string>(); |
503 | max_width=0; |
504 | |
505 | for (unsigned int arg=0; arg<cmd_args.size();arg++){ |
506 | cmd_arg_t akt_arg=cmd_args[arg]; |
507 | left.insert(left.end(),akt_arg.placeholder); |
508 | right.insert(right.end(),akt_arg.description); |
509 | } |
510 | |
511 | // Determine maximal width for left column |
512 | max_width=0; |
513 | for (unsigned int c=0; c<left.size();c++) |
514 | if(left[c].length()>max_width) max_width=left[c].length(); |
515 | |
516 | for (unsigned int c=0; c<left.size();c++){ |
517 | string nl(max_width,' '); |
518 | nl.replace(0,left[c].length(),left[c]); |
519 | nl+=" "+right[c]; |
520 | while (nl.length()>MAX_LINE_LENGTH){ // Too long??? |
521 | int limit=nl.find_last_of(' ',MAX_LINE_LENGTH+1); |
522 | // printf("limit:%i\n",limit); |
523 | target.insert(target.end(),nl.substr(0,limit)); |
524 | nl=string(max_width+2,' ')+nl.substr(limit+1); |
525 | } |
526 | target.insert(target.end(),nl); |
527 | } |
ad324d29 |
528 | target.insert(target.end(),""); |
909d3603 |
529 | } |
ad324d29 |
530 | } |
531 | |
532 | /*! |
533 | *\brief Generate help. |
534 | *\return A vector containing many helpful strings for the user. |
535 | */ |
ca5fce3a |
536 | vector<string> configuration_manager::get_help(){ |
ad324d29 |
537 | vector<string> result; |
538 | get_help(result); |
539 | return result; |
540 | } |
541 | |
542 | |
543 | /**************************************************/ |
544 | |
909d3603 |
545 | |
546 | configuration_manager::opt_value_t::opt_value_t(const string & shortname, |
547 | const string & longname, |
548 | const string & description, |
549 | int * status, |
550 | string * target, |
551 | const string & placeholder, |
552 | const bool & allow_conffile, |
553 | const bool & allow_cmdline |
554 | ){ |
555 | this->shortname=shortname; |
556 | this->longname=longname; |
557 | this->description=description; |
558 | this->status=status; |
559 | this->target=target; |
560 | this->placeholder=placeholder; |
561 | this->allow_conffile=allow_conffile; |
562 | this->allow_cmdline=allow_cmdline; |
ad324d29 |
563 | if (status) *status=0; |
564 | } |
565 | |
909d3603 |
566 | |
567 | configuration_manager::opt_switch_t::opt_switch_t(const string & shortname, |
568 | const string & longname, |
569 | const string & description, |
570 | int * status, |
571 | const bool & allow_conffile, |
572 | const bool & allow_cmdline){ |
573 | this->shortname=shortname; |
574 | this->longname=longname; |
575 | this->description=description; |
576 | this->status=status; |
577 | this->target=target; |
578 | this->placeholder=placeholder; |
579 | this->allow_conffile=allow_conffile; |
580 | this->allow_cmdline=allow_cmdline; |
ad324d29 |
581 | } |
909d3603 |
582 | |
583 | |
584 | configuration_manager::cmd_arg_t::cmd_arg_t(const string & placeholder, |
585 | const string & description, |
586 | int * status, |
587 | string * target){ |
588 | this->placeholder=placeholder; |
589 | this->description=description; |
590 | this->status=status; |
591 | this->target=target; |
909d3603 |
592 | } |