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::operator()(ParseCommandInfo const & command,
  50                                                  std::ostream & output)
  51 {
  52     SENF_LOG(( "Executing: " << command ));
  53
  54     if (cwd_.expired() || ! cwd().active())
  55         cwd_ = root().thisptr();
  56
  57     try {
  58         switch(command.builtin()) {
  59         case ParseCommandInfo::NoBuiltin :
  60             traverseCommand(command.commandPath())(output, command.arguments());
  61             break;
  62
  63         case ParseCommandInfo::BuiltinCD :
  64             if ( command.arguments() ) {
  65                 if (command.arguments().begin()->size() == 1
  66                     && command.arguments().begin()->begin()->value() == "-") {
  67                     if (oldCwd_.expired() || ! oldCwd_.lock()->active()) {
  68                         oldCwd_ = cwd_;
  69                         cwd_ = root().thisptr();
  70                     } else
  71                         swap(cwd_, oldCwd_);
  72                 }
  73                 else {
  74                     oldCwd_ = cwd_;
  75                     cwd_ = traverseDirectory(command.arguments().begin()[0]).thisptr();
  76                 }
  77             }
  78             break;
  79
  80         case ParseCommandInfo::BuiltinLS : {
  81             DirectoryNode const & dir ( command.arguments()
  82                                         ? traverseDirectory(command.arguments().begin()[0])
  83                                         : cwd() );
  84             for (DirectoryNode::child_iterator i (dir.children().begin());
  85                  i != dir.children().end(); ++i) {
  86                 output << i->first;
  87                 if (boost::dynamic_pointer_cast<DirectoryNode>(i->second))
  88                     output << "/";
  89                 output << "\n";
  90             }
  91             break;
  92         }
  93
  94         case ParseCommandInfo::BuiltinPUSHD :
  95             dirstack_.push_back(cwd_);
  96             if ( command.arguments() )
  97                 cwd_ = traverseDirectory(command.arguments().begin()[0]).thisptr();
  98             break;
  99
 100         case ParseCommandInfo::BuiltinPOPD :
 101             if (! dirstack_.empty()) {
 102                 cwd_ = dirstack_.back();
 103                 dirstack_.pop_back();
 104             }
 105             break;
 106
 107         case ParseCommandInfo::BuiltinEXIT :
 108             throw ExitException();
 109
 110         case ParseCommandInfo::BuiltinHELP :
 111             GenericNode const & node (command.arguments()
 112                                       ? traverseNode(command.arguments().begin()[0])
 113                                       : cwd());
 114             output << prettyName(typeid(node)) << " at " << node.path() << "\n\n";
 115             node.help(output);
 116             output << std::flush;
 117             break;
 118
 119         }
 120     }
 121     catch (InvalidPathException &) {
 122         output << "invalid path" << std::endl;
 123     }
 124     catch (InvalidDirectoryException &) {
 125         output << "invalid directory" << std::endl;
 126     }
 127     catch (InvalidCommandException &) {
 128         output << "invalid command" << std::endl;
 129     }
 130 }
 131
 132 prefix_ senf::console::GenericNode &
 133 senf::console::Executor::traverseNode(ParseCommandInfo::argument_value_type const & path)
 134 {
 135     try {
 136         return cwd().traverse(
 137             boost::make_iterator_range(
 138                 boost::make_transform_iterator(path.begin(), TraverseTokens()),
 139                 boost::make_transform_iterator(path.end(), TraverseTokens())));
 140     }
 141     catch (std::bad_cast &) {
 142         throw InvalidPathException();
 143     }
 144     catch (UnknownNodeNameException &) {
 145         throw InvalidPathException();
 146     }
 147 }
 148
 149 prefix_ senf::console::DirectoryNode &
 150 senf::console::Executor::traverseDirectory(ParseCommandInfo::argument_value_type const & path)
 151 {
 152     try {
 153         return dynamic_cast<DirectoryNode&>( traverseNode(path) );
 154     }
 155     catch (std::bad_cast &) {
 156         throw InvalidDirectoryException();
 157     }
 158     catch (InvalidPathException &) {
 159         throw InvalidDirectoryException();
 160     }
 161 }
 162
 163 prefix_ senf::console::CommandNode &
 164 senf::console::Executor::traverseCommand(ParseCommandInfo::CommandPathRange const & path)
 165 {
 166     try {
 167         return dynamic_cast<CommandNode &>( cwd().traverse(path) );
 168     }
 169     catch (std::bad_cast &) {
 170         throw InvalidCommandException();
 171     }
 172     catch (UnknownNodeNameException &) {
 173         throw InvalidCommandException();
 174     }
 175 }
 176
 177 ///////////////////////////////cc.e////////////////////////////////////////
 178 #undef prefix_
 179 //#include "Executor.mpp"
 180
 181 \f
 182 // Local Variables:
 183 // mode: c++
 184 // fill-column: 100
 185 // comment-column: 40
 186 // c-file-style: "senf"
 187 // indent-tabs-mode: nil
 188 // ispell-local-dictionary: "american"
 189 // compile-command: "scons -u test"
 190 // End: