Console/Executor.cc

   1 // $Id$
   2 //
   3 // Copyright (C) 2008
   4 // Fraunhofer Institute for Open Communication Systems (FOKUS)
   5 // Competence Center NETwork research (NET), St. Augustin, GERMANY
   6 //     Stefan Bund <g0dil@berlios.de>
   7 //
   8 // This program is free software; you can redistribute it and/or modify
   9 // it under the terms of the GNU General Public License as published by
  10 // the Free Software Foundation; either version 2 of the License, or
  11 // (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the
  20 // Free Software Foundation, Inc.,
  21 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22
  23 /** \file
  24     \brief Executor non-inline non-template implementation */
  25
  26 #include "Executor.hh"
  27 //#include "Executor.ih"
  28
  29 // Custom includes
  30
  31 //#include "Executor.mpp"
  32 #define prefix_
  33 ///////////////////////////////cc.p////////////////////////////////////////
  34
  35 namespace {
  36
  37     struct TraverseTokens {
  38         typedef std::string const & result_type;
  39         result_type operator()(senf::console::ArgumentToken const & token) const {
  40             return token.value();
  41         }
  42     };
  43
  44 }
  45
  46 ///////////////////////////////////////////////////////////////////////////
  47 // senf::console::Executor
  48
  49 prefix_ void senf::console::Executor::execute(std::ostream & output,
  50                                               ParseCommandInfo const & command)
  51 {
  52     SENF_LOG(( "Executing: " << command ));
  53
  54     if (cwd_.expired() || ! cwd().active())
  55         cwd_ = root_;
  56
  57     try {
  58         switch(command.builtin()) {
  59         case ParseCommandInfo::NoBuiltin : {
  60             if (skipping_)
  61                 break;
  62             GenericNode & node ( traverseCommand(command.commandPath()) );
  63             DirectoryNode * dir ( dynamic_cast<DirectoryNode*>(&node) );
  64             if ( dir ) {
  65                 if (autocd_ && command.tokens().empty()) {
  66                     oldCwd_ = cwd_;
  67                     cwd_ = dir->thisptr();
  68                 } else
  69                     throw InvalidCommandException();
  70             } else {
  71                 dynamic_cast<CommandNode &>(node)(output, command);
  72             }
  73             break;
  74         }
  75
  76         case ParseCommandInfo::BuiltinCD :
  77             if (skipping_)
  78                 break;
  79             try {
  80                 if ( command.arguments() ) {
  81                     if (command.arguments().begin()->size() == 1
  82                         && command.arguments().begin()->begin()->value() == "-") {
  83                         if (oldCwd_.expired() || ! oldCwd_.lock()->active()) {
  84                             oldCwd_ = cwd_;
  85                             cwd_ = root_;
  86                         } else
  87                             swap(cwd_, oldCwd_);
  88                     }
  89                     else {
  90                         oldCwd_ = cwd_;
  91                     cwd_ = traverseDirectory(*command.arguments().begin()).thisptr();
  92                     }
  93                 }
  94             }
  95             catch (IgnoreCommandException &) {
  96                 throw SyntaxErrorException(
  97                     "'cd' cannot be skipped (don't use 'cd' in conf-files)");
  98             }
  99             break;
 100
 101         case ParseCommandInfo::BuiltinLS : {
 102             if (skipping_)
 103                 break;
 104             DirectoryNode const & dir ( command.arguments()
 105                                         ? traverseDirectory(*command.arguments().begin())
 106                                         : cwd() );
 107             for (DirectoryNode::child_iterator i (dir.children().begin());
 108                  i != dir.children().end(); ++i) {
 109                 output << i->first;
 110                 if (boost::dynamic_pointer_cast<DirectoryNode>(i->second))
 111                     output << "/";
 112                 output << "\n";
 113             }
 114             break;
 115         }
 116
 117         case ParseCommandInfo::BuiltinPUSHD :
 118             dirstack_.push_back(DirEntry(cwd_, skipping_));
 119             if ( ! skipping_ && command.arguments() ) {
 120                 try {
 121                     cwd_ = traverseDirectory(*command.arguments().begin()).thisptr();
 122                 }
 123                 catch (IgnoreCommandException &) {
 124                     cwd_.reset();
 125                     skipping_ = true;
 126                 }
 127             }
 128             break;
 129
 130         case ParseCommandInfo::BuiltinPOPD :
 131             if (! dirstack_.empty()) {
 132                 cwd_ = dirstack_.back().dir;
 133                 skipping_ = dirstack_.back().skip;
 134                 dirstack_.pop_back();
 135             }
 136             break;
 137
 138         case ParseCommandInfo::BuiltinEXIT :
 139             if (skipping_)
 140                 break;
 141             throw ExitException();
 142
 143         case ParseCommandInfo::BuiltinHELP :
 144             if (skipping_)
 145                 break;
 146             GenericNode const & node (command.arguments()
 147                                       ? traverseNode(*command.arguments().begin())
 148                                       : cwd());
 149             output << prettyName(typeid(node)) << " at " << node.path() << "\n\n";
 150             node.help(output);
 151             output << std::flush;
 152             break;
 153
 154         }
 155     }
 156     catch (InvalidPathException &) {
 157         output << "invalid path" << std::endl;
 158     }
 159     catch (InvalidDirectoryException &) {
 160         output << "invalid directory" << std::endl;
 161     }
 162     catch (InvalidCommandException &) {
 163         output << "invalid command" << std::endl;
 164     }
 165     catch (IgnoreCommandException &) {}
 166 }
 167
 168 prefix_ senf::console::GenericNode &
 169 senf::console::Executor::traverseNode(ParseCommandInfo::TokensRange const & path)
 170 {
 171     try {
 172         return traverse(
 173             cwd(),
 174             boost::make_iterator_range(
 175                 boost::make_transform_iterator(path.begin(), TraverseTokens()),
 176                 boost::make_transform_iterator(path.end(), TraverseTokens())) );
 177     }
 178     catch (std::bad_cast &) {
 179         throw InvalidPathException();
 180     }
 181     catch (UnknownNodeNameException &) {
 182         throw InvalidPathException();
 183     }
 184 }
 185
 186 prefix_ senf::console::GenericNode &
 187 senf::console::Executor::traverseCommand(ParseCommandInfo::CommandPathRange const & path)
 188 {
 189     try {
 190         return traverse(cwd(), path);
 191     }
 192     catch (std::bad_cast &) {
 193         throw InvalidPathException();
 194     }
 195     catch (UnknownNodeNameException &) {
 196         throw InvalidPathException();
 197     }
 198 }
 199
 200 prefix_ senf::console::DirectoryNode &
 201 senf::console::Executor::traverseDirectory(ParseCommandInfo::TokensRange const & path)
 202 {
 203     try {
 204         return dynamic_cast<DirectoryNode&>( traverseNode(path) );
 205     }
 206     catch (std::bad_cast &) {
 207         throw InvalidDirectoryException();
 208     }
 209     catch (InvalidPathException &) {
 210         throw InvalidDirectoryException();
 211     }
 212 }
 213
 214 ///////////////////////////////cc.e////////////////////////////////////////
 215 #undef prefix_
 216 //#include "Executor.mpp"
 217
 218 \f
 219 // Local Variables:
 220 // mode: c++
 221 // fill-column: 100
 222 // comment-column: 40
 223 // c-file-style: "senf"
 224 // indent-tabs-mode: nil
 225 // ispell-local-dictionary: "american"
 226 // compile-command: "scons -u test"
 227 // End: