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_ bool 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             traverseToCommand(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_ = traverseTo(command.arguments().begin()[0]).thisptr();
  76                 }
  77             }
  78             break;
  79
  80         case ParseCommandInfo::BuiltinLS : {
  81             DirectoryNode const & dir (
  82                 command.arguments().empty() ? cwd() : traverseTo(command.arguments().begin()[0]));
  83             for (DirectoryNode::child_iterator i (dir.children().begin());
  84                  i != dir.children().end(); ++i) {
  85                 output << i->first;
  86                 if (boost::dynamic_pointer_cast<DirectoryNode>(i->second))
  87                     output << "/";
  88                 output << "\n";
  89             }
  90             break;
  91         }
  92
  93         case ParseCommandInfo::BuiltinPUSHD :
  94             dirstack_.push_back(cwd_);
  95             if ( command.arguments() )
  96                 cwd_ = traverseTo(command.arguments().begin()[0]).thisptr();
  97             break;
  98
  99         case ParseCommandInfo::BuiltinPOPD :
 100             if (! dirstack_.empty()) {
 101                 cwd_ = dirstack_.back();
 102                 dirstack_.pop_back();
 103             }
 104             break;
 105
 106         case ParseCommandInfo::BuiltinEXIT :
 107             throw ExitException();
 108
 109         case ParseCommandInfo::BuiltinHELP :
 110             try {
 111                 GenericNode & node (
 112                     command.arguments()
 113                     ? cwd().traverse(
 114                         boost::make_iterator_range(
 115                             boost::make_transform_iterator(command.arguments().begin()[0].begin(), TraverseTokens()),
 116                             boost::make_transform_iterator(command.arguments().begin()[0].end(), TraverseTokens())))
 117                     : cwd() );
 118                 node.help(output);
 119                 output << std::flush;
 120             }
 121             catch (UnknownNodeNameException &) {
 122                 output << "invalid path" << std::endl;
 123             }
 124             break;
 125         }
 126     }
 127     catch (InvalidDirectoryException &) {
 128         output << "invalid directory" << std::endl;
 129     }
 130     catch (InvalidCommandException &) {
 131         output << "invalid command" << std::endl;
 132     }
 133     return true;
 134 }
 135
 136 prefix_ senf::console::DirectoryNode &
 137 senf::console::Executor::traverseTo (ParseCommandInfo::argument_value_type const & path)
 138 {
 139     try {
 140         return dynamic_cast<DirectoryNode&>(
 141             cwd().traverse(
 142                 boost::make_iterator_range(
 143                     boost::make_transform_iterator(path.begin(), TraverseTokens()),
 144                     boost::make_transform_iterator(path.end(), TraverseTokens()))));
 145     }
 146     catch (std::bad_cast &) {
 147         throw InvalidDirectoryException();
 148     }
 149     catch (UnknownNodeNameException &) {
 150         throw InvalidDirectoryException();
 151     }
 152 }
 153
 154 prefix_ senf::console::CommandNode &
 155 senf::console::Executor::traverseToCommand(ParseCommandInfo::CommandPathRange const & path)
 156 {
 157     try {
 158         return dynamic_cast<CommandNode &>( cwd().traverse(path) );
 159     }
 160     catch (std::bad_cast &) {
 161         throw InvalidCommandException();
 162     }
 163     catch (UnknownNodeNameException &) {
 164         throw InvalidCommandException();
 165     }
 166 }
 167
 168 ///////////////////////////////cc.e////////////////////////////////////////
 169 #undef prefix_
 170 //#include "Executor.mpp"
 171
 172 \f
 173 // Local Variables:
 174 // mode: c++
 175 // fill-column: 100
 176 // comment-column: 40
 177 // c-file-style: "senf"
 178 // indent-tabs-mode: nil
 179 // ispell-local-dictionary: "american"
 180 // compile-command: "scons -u test"
 181 // End: