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<hr><h1>command.cpp</h1><a href="command_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025
00026 <font class="preprocessor">#include "<a class="code" href="stdmisc_8h.html">stdmisc.h</a>"</font>
00027
00028 <font class="preprocessor">#include "<a class="code" href="command_8h.html">nel/misc/command.h</a>"</font>
00029
00030 <font class="keyword">using</font> <font class="keyword">namespace </font>std;
00031 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00032
00033 <font class="keyword">namespace </font>NLMISC {
00034
<a name="l00035"></a><a class="code" href="classNLMISC_1_1ICommand.html#p0">00035</a> ICommand::TCommand *ICommand::Commands;
<a name="l00036"></a><a class="code" href="classNLMISC_1_1ICommand.html#p1">00036</a> <font class="keywordtype">bool</font> ICommand::CommandsInit;
00037
<a name="l00038"></a><a class="code" href="classNLMISC_1_1ICommand.html#a0">00038</a> ICommand::ICommand(<font class="keyword">const</font> <font class="keywordtype">char</font> *commandName, <font class="keyword">const</font> <font class="keywordtype">char</font> *commandHelp, <font class="keyword">const</font> <font class="keywordtype">char</font> *commandArgs)
00039 {
00040 <font class="comment">// self registration</font>
00041
00042 <font class="keywordflow">if</font> (!<a class="code" href="classNLMISC_1_1ICommand.html#p1">CommandsInit</a>)
00043 {
00044 <font class="comment">//printf("create map\n");</font>
00045 <a class="code" href="classNLMISC_1_1ICommand.html#p0">Commands</a> = <font class="keyword">new</font> <a class="code" href="classNLMISC_1_1ICommand.html#s0">TCommand</a>;
00046 <a class="code" href="classNLMISC_1_1ICommand.html#p1">CommandsInit</a> = <font class="keyword">true</font>;
00047 }
00048
00049 TCommand::iterator comm = (*Commands).find(commandName);
00050
00051 <font class="keywordflow">if</font> (comm != (*Commands).end ())
00052 {
00053 <font class="comment">// 2 commands have the same name</font>
00054 <a class="code" href="debug_8h.html#a14">nlstopex</a> ((<font class="stringliteral">"There are 2 commands that have the same name in the project (command name '%s'), skip the second definition"</font>, commandName));
00055 }
00056 <font class="keywordflow">else</font>
00057 {
00058 <font class="comment">// insert the new command in the map</font>
00059 <font class="comment">//printf("add command\n");</font>
00060 <a class="code" href="classNLMISC_1_1ICommand.html#m0">HelpString</a> = commandHelp;
00061 <a class="code" href="classNLMISC_1_1ICommand.html#m1">CommandArgs</a> = commandArgs;
00062 <a class="code" href="classNLMISC_1_1ICommand.html#n0">_CommandName</a> = commandName;
00063 <a class="code" href="classNLMISC_1_1ICommand.html#m2">Type</a> = <a class="code" href="classNLMISC_1_1ICommand.html#s4s2">Command</a>;
00064 (*Commands)[commandName] = <font class="keyword">this</font>;
00065 }
00066 }
00067
00068 ICommand::~ICommand()
00069 {
00070 <font class="comment">// self deregistration</font>
00071
00072 <font class="keywordflow">if</font> (!<a class="code" href="classNLMISC_1_1ICommand.html#p1">CommandsInit</a>)
00073 {
00074 <font class="comment">// should never happen</font>
00075 <a class="code" href="debug_8h.html#a12">nlstop</a>;
00076 <font class="keywordflow">return</font>;
00077 }
00078
00079 <font class="comment">// find the command</font>
00080
00081 <font class="keywordflow">for</font> (TCommand::iterator comm = (*Commands).begin(); comm != (*Commands).end(); comm++)
00082 {
00083 <font class="keywordflow">if</font> ((*comm).second == <font class="keyword">this</font>)
00084 {
00085 <font class="comment">//printf("remove command\n");</font>
00086 (*Commands).erase (comm);
00087
00088 <font class="keywordflow">if</font> ((*Commands).size() == 0)
00089 {
00090 <font class="comment">// if the commands map is empty, destroy it</font>
00091 <font class="comment">//printf("delete map\n");</font>
00092 <font class="keyword">delete</font> <a class="code" href="classNLMISC_1_1ICommand.html#p0">Commands</a>;
00093 <a class="code" href="classNLMISC_1_1ICommand.html#p1">CommandsInit</a> = <font class="keyword">false</font>;
00094 }
00095
00096 <font class="keywordflow">return</font>;
00097 }
00098 }
00099 <font class="comment">// commands is not found</font>
00100 <a class="code" href="debug_8h.html#a12">nlstop</a>;
00101 }
00102
<a name="l00103"></a><a class="code" href="classNLMISC_1_1ICommand.html#d0">00103</a> <font class="keywordtype">void</font> ICommand::execute (<font class="keyword">const</font> std::string &commandWithArgs, CLog &log, <font class="keywordtype">bool</font> quiet)
00104 {
00105 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Executing command : '%s'"</font>, commandWithArgs.c_str());
00106
00107 <font class="comment">// convert the buffer into string vector</font>
00108
00109 vector<string> args;
00110 string command;
00111
00112 <font class="keywordtype">bool</font> firstArg = <font class="keyword">true</font>;
00113 uint i = 0;
00114 <font class="keywordflow">while</font> (true)
00115 {
00116 <font class="comment">// skip whitespace</font>
00117 <font class="keywordflow">while</font> (true)
00118 {
00119 <font class="keywordflow">if</font> (i == commandWithArgs.size())
00120 {
00121 <font class="keywordflow">goto</font> end;
00122 }
00123 <font class="keywordflow">if</font> (commandWithArgs[i] != <font class="charliteral">' '</font> && commandWithArgs[i] != <font class="charliteral">'\t'</font> && commandWithArgs[i] != <font class="charliteral">'\n'</font> && commandWithArgs[i] != <font class="charliteral">'\r'</font>)
00124 {
00125 <font class="keywordflow">break</font>;
00126 }
00127 i++;
00128 }
00129
00130 <font class="comment">// get param</font>
00131 string arg;
00132 <font class="keywordflow">if</font> (commandWithArgs[i] == <font class="charliteral">'\"'</font>)
00133 {
00134 <font class="comment">// starting with a quote "</font>
00135 i++;
00136 <font class="keywordflow">while</font> (true)
00137 {
00138 <font class="keywordflow">if</font> (i == commandWithArgs.size())
00139 {
00140 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Missing end quote character \""</font>);
00141 <font class="keywordflow">return</font>;
00142 }
00143 <font class="keywordflow">if</font> (commandWithArgs[i] == <font class="charliteral">'"'</font>)
00144 {
00145 i++;
00146 <font class="keywordflow">break</font>;
00147 }
00148 <font class="keywordflow">if</font> (commandWithArgs[i] == <font class="charliteral">'\\'</font>)
00149 {
00150 <font class="comment">// manage escape char backslash</font>
00151 i++;
00152 <font class="keywordflow">if</font> (i == commandWithArgs.size())
00153 {
00154 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Missing character after the backslash \\ character"</font>);
00155 <font class="keywordflow">return</font>;
00156 }
00157 <font class="keywordflow">switch</font> (commandWithArgs[i])
00158 {
00159 <font class="keywordflow">case</font> <font class="charliteral">'\\'</font>: arg += <font class="charliteral">'\\'</font>; <font class="keywordflow">break</font>; <font class="comment">// double backslash</font>
00160 <font class="keywordflow">case</font> <font class="charliteral">'n'</font>: arg += <font class="charliteral">'\n'</font>; <font class="keywordflow">break</font>; <font class="comment">// new line</font>
00161 <font class="keywordflow">case</font> <font class="charliteral">'"'</font>: arg += <font class="charliteral">'"'</font>; <font class="keywordflow">break</font>; <font class="comment">// "</font>
00162 <font class="keywordflow">default</font>:
00163 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Unknown escape code '\\%c'"</font>, commandWithArgs[i]);
00164 <font class="keywordflow">return</font>;
00165 }
00166 i++;
00167 }
00168 <font class="keywordflow">else</font>
00169 {
00170 arg += commandWithArgs[i++];
00171 }
00172 }
00173 }
00174 <font class="keywordflow">else</font>
00175 {
00176 <font class="comment">// normal word</font>
00177 <font class="keywordflow">while</font> (true)
00178 {
00179 <font class="keywordflow">if</font> (commandWithArgs[i] == <font class="charliteral">'\\'</font>)
00180 {
00181 <font class="comment">// manage escape char backslash</font>
00182 i++;
00183 <font class="keywordflow">if</font> (i == commandWithArgs.size())
00184 {
00185 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Missing character after the backslash \\ character"</font>);
00186 <font class="keywordflow">return</font>;
00187 }
00188 <font class="keywordflow">switch</font> (commandWithArgs[i])
00189 {
00190 <font class="keywordflow">case</font> <font class="charliteral">'\\'</font>: arg += <font class="charliteral">'\\'</font>; <font class="keywordflow">break</font>; <font class="comment">// double backslash</font>
00191 <font class="keywordflow">case</font> <font class="charliteral">'n'</font>: arg += <font class="charliteral">'\n'</font>; <font class="keywordflow">break</font>; <font class="comment">// new line</font>
00192 <font class="keywordflow">case</font> <font class="charliteral">'"'</font>: arg += <font class="charliteral">'"'</font>; <font class="keywordflow">break</font>; <font class="comment">// "</font>
00193 <font class="keywordflow">default</font>:
00194 <font class="keywordflow">if</font> (!quiet) log.displayNL (<font class="stringliteral">"Unknown escape code '\\%c'"</font>, commandWithArgs[i]);
00195 <font class="keywordflow">return</font>;
00196 }
00197 i++;
00198 }
00199 <font class="keywordflow">else</font>
00200 {
00201 arg += commandWithArgs[i++];
00202 }
00203 <font class="keywordflow">if</font> (i == commandWithArgs.size() || commandWithArgs[i] == <font class="charliteral">' '</font> || commandWithArgs[i] == <font class="charliteral">'\t'</font> || commandWithArgs[i] == <font class="charliteral">'\n'</font> || commandWithArgs[i] == <font class="charliteral">'\r'</font>)
00204 {
00205 <font class="keywordflow">break</font>;
00206 }
00207 }
00208 }
00209 <font class="keywordflow">if</font> (firstArg)
00210 {
00211 command = arg;
00212 firstArg = <font class="keyword">false</font>;
00213 }
00214 <font class="keywordflow">else</font>
00215 {
00216 args.push_back (arg);
00217 }
00218 }
00219 end:
00220
00221 <font class="comment">/* displays args fordebug purpose</font>
00222 <font class="comment"> nlinfo ("c '%s'", command.c_str());</font>
00223 <font class="comment"> for (uint t = 0; t < args.size (); t++)</font>
00224 <font class="comment"> {</font>
00225 <font class="comment"> nlinfo ("p%d '%s'", t, args[t].c_str());</font>
00226 <font class="comment"> }</font>
00227 <font class="comment">*/</font>
00228
00229 <font class="comment">// find the command </font>
00230 TCommand::iterator comm = (*Commands).find(command.c_str());
00231 <font class="keywordflow">if</font> (comm == (*Commands).end ())
00232 {
00233 <font class="comment">// the command doesn't exist</font>
00234 <font class="keywordflow">if</font> (!quiet) log.displayNL(<font class="stringliteral">"Command '%s' not found, try 'help'"</font>, command.c_str());
00235 }
00236 <font class="keywordflow">else</font>
00237 {
00238 <font class="comment">//printf("execute command\n");</font>
00239 <font class="keywordflow">if</font> (!(*comm).second->execute (args, log))
00240 {
00241 <font class="keywordflow">if</font> (!quiet) log.displayNL(<font class="stringliteral">"Bad command usage, try 'help %s'"</font>, command.c_str());
00242 }
00243 }
00244 }
00245
00246
00247 <font class="comment">/*</font>
00248 <font class="comment"> * Command name completion.</font>
00249 <font class="comment"> * Case-sensitive. Displays the list after two calls with the same non-unique completion.</font>
00250 <font class="comment"> * Completes commands used with prefixes (such as "help " for example) as well.</font>
00251 <font class="comment"> */</font>
<a name="l00252"></a><a class="code" href="classNLMISC_1_1ICommand.html#d1">00252</a> <font class="keywordtype">void</font> ICommand::expand (std::string &commandName, <a class="code" href="classNLMISC_1_1CLog.html">NLMISC::CLog</a> &log)
00253 {
00254 <font class="comment">// Take out the string before the last separator and remember it as a prefix</font>
00255 uint32 lastseppos = commandName.find_last_of( <font class="stringliteral">" "</font> );
00256 string prefix;
00257 <font class="keywordtype">bool</font> useprefix;
00258 <font class="keywordflow">if</font> ( lastseppos != string::npos )
00259 {
00260 prefix = commandName.substr( 0, lastseppos+1 );
00261 commandName.erase( 0, lastseppos+1 );
00262 useprefix = <font class="keyword">true</font>;
00263 }
00264 <font class="keywordflow">else</font>
00265 {
00266 useprefix = <font class="keyword">false</font>;
00267 }
00268
00269 string lowerCommandName = <a class="code" href="namespaceNLMISC.html#a229">strlwr</a>(const_cast<const string &>(commandName));
00270 <font class="comment">// Build the list of matching command names</font>
00271 vector<string> matchingnames;
00272 <font class="keywordflow">for</font> (TCommand::iterator comm = (*Commands).begin(); comm != (*Commands).end(); comm++)
00273 {
00274 string first = <a class="code" href="namespaceNLMISC.html#a229">strlwr</a>(const_cast<const string &>((*comm).first));
00275 <font class="keywordflow">if</font> (first.find( lowerCommandName ) == 0)
00276 {
00277 matchingnames.push_back( (*comm).first );
00278 }
00279 }
00280
00281 <font class="comment">// Do not complete if there is no result</font>
00282 <font class="keywordflow">if</font> ( matchingnames.empty() )
00283 {
00284 log.<a class="code" href="classNLMISC_1_1CLog.html#a8">displayNL</a>( <font class="stringliteral">"No matching command"</font> );
00285 <font class="keywordflow">goto</font> returnFromExpand;
00286 }
00287
00288 <font class="comment">// Complete if there is a single result</font>
00289 <font class="keywordflow">if</font> ( matchingnames.size() == 1 )
00290 {
00291 commandName = matchingnames.front() + <font class="stringliteral">" "</font>;
00292 <font class="keywordflow">goto</font> returnFromExpand;
00293 }
00294
00295 <font class="comment">// Try to complete to the common part if there are several results</font>
00296 {
00297 <font class="comment">// Stop loop when a name size is i or names[i] are different</font>
00298 string commonstr = commandName;
00299 uint i = commandName.size();
00300 <font class="keywordflow">while</font> ( true )
00301 {
00302 <font class="keywordtype">char</font> letter = 0;
00303 vector<string>::iterator imn;
00304 <font class="keywordflow">for</font> ( imn=matchingnames.begin(); imn!=matchingnames.end(); ++imn )
00305 {
00306 <font class="comment">// Return common string if the next letter is not the same in all matching names</font>
00307 <font class="keywordflow">if</font> ( ((*imn).size() == i) || ( (letter!=0) && ((*imn)[i] != letter) ) )
00308 {
00309 log.<a class="code" href="classNLMISC_1_1CLog.html#a8">displayNL</a>( <font class="stringliteral">"(Matching command not unique)"</font> );
00310 <font class="keyword">static</font> string lastCommandName;
00311 commandName = commonstr;
00312 <font class="keywordflow">if</font> ( lastCommandName == commandName )
00313 {
00314 <font class="comment">// Display all the matching names </font>
00315 vector<string>::iterator imn2;
00316 stringstream ss;
00317 ss << <font class="stringliteral">"Matching commands:"</font> << endl;
00318 <font class="keywordflow">for</font> ( imn2=matchingnames.begin(); imn2!=matchingnames.end(); ++imn2 )
00319 {
00320 ss << <font class="stringliteral">" "</font> << (*imn2);
00321 }
00322 log.<a class="code" href="classNLMISC_1_1CLog.html#a8">displayNL</a>( <font class="stringliteral">"%s"</font>, ss.str().c_str() );
00323 }
00324 lastCommandName = commandName;
00325 <font class="keywordflow">goto</font> returnFromExpand;
00326 }
00327 <font class="comment">// Add the next letter to the common string if it is the same in all matching names</font>
00328 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ( letter == 0 )
00329 {
00330 letter = (*imn)[i];
00331 }
00332 }
00333 commonstr += letter;
00334 ++i;
00335 }
00336 }
00337
00338 returnFromExpand:
00339
00340 <font class="comment">// Put back the prefix</font>
00341 <font class="keywordflow">if</font> ( useprefix )
00342 {
00343 commandName = prefix + commandName;
00344 }
00345 }
00346
00347
<a name="l00348"></a><a class="code" href="classNLMISC_1_1ICommand.html#d2">00348</a> <font class="keywordtype">void</font> ICommand::serialCommands (IStream &f)
00349 {
00350 vector<CSerialCommand> cmd;
00351 <font class="keywordflow">for</font> (TCommand::iterator comm = (*Commands).begin(); comm != (*Commands).end(); comm++)
00352 {
00353 cmd.push_back (CSerialCommand ((*comm).first, (*comm).second->Type));
00354 }
00355 f.serialCont (cmd);
00356 }
00357
00358
00359 <a class="code" href="namespaceNLMISC.html#a288">NLMISC_COMMAND</a>(help,<font class="stringliteral">"display help on a specific variable/commands or on all variables and commands"</font>, <font class="stringliteral">"[<variable>|<command>]"</font>)
00360 {
00361 <font class="keywordflow">if</font> (args.size() == 0)
00362 {
00363 <font class="comment">// display all commands</font>
00364 <font class="keywordflow">for</font> (TCommand::iterator comm = (*Commands).begin(); comm != (*Commands).end(); comm++)
00365 {
00366 log.displayNL(<font class="stringliteral">"%-15s: %s"</font>, (*comm).first.c_str(), (*comm).second->HelpString.c_str());
00367 }
00368 }
00369 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (args.size() == 1)
00370 {
00371 <font class="comment">// display help of the command</font>
00372 TCommand::iterator comm = (*Commands).find(args[0].c_str());
00373 <font class="keywordflow">if</font> (comm == (*Commands).end ())
00374 {
00375 log.displayNL(<font class="stringliteral">"command '%s' not found"</font>, args[0].c_str());
00376 }
00377 <font class="keywordflow">else</font>
00378 {
00379 log.displayNL(<font class="stringliteral">"%s"</font>, (*comm).second->HelpString.c_str());
00380 log.displayNL(<font class="stringliteral">"usage: %s %s"</font>, (*comm).first.c_str(), (*comm).second->CommandArgs.c_str(), (*comm).second->HelpString.c_str());
00381 }
00382 }
00383 <font class="keywordflow">else</font>
00384 {
00385 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00386 }
00387 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00388 }
00389
00390 } <font class="comment">// NLMISC</font>
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