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