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