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 ///////////////////////////////////////////////////////////////////////////
  36 // senf::console::Executor
  37
  38 prefix_ bool senf::console::Executor::operator()(ParseCommandInfo const & command,
  39                                                  std::ostream & output)
  40 {
  41     SENF_LOG(( "Executing: " << command ));
  42
  43     if (cwd_.expired())
  44         cwd_ = boost::static_pointer_cast<DirectoryNode>(
  45             root().shared_from_this());
  46
  47     switch(command.builtin()) {
  48     case ParseCommandInfo::NoBuiltin :
  49         break;
  50
  51     case ParseCommandInfo::BuiltinCD :
  52         if ( command.arguments() &&
  53              ! chdir(command.arguments().begin()[0]) )
  54             output << "invalid directory\n";
  55         break;
  56
  57     case ParseCommandInfo::BuiltinLS :
  58         for (DirectoryNode::child_iterator i (cwd().children().begin());
  59              i != cwd().children().end(); ++i) {
  60             output << i->first;
  61             try {
  62                 (void) cwd()(i->first);
  63             }
  64             catch (std::bad_cast &) {
  65                 output << "/";
  66             }
  67             output << "\n";
  68         }
  69         break;
  70
  71     case ParseCommandInfo::BuiltinPUSHD :
  72         dirstack_.push_back(cwd_);
  73         if ( command.arguments()
  74              && ! chdir(command.arguments().begin()[0]) )
  75             output << "invalid directory\n";
  76         break;
  77
  78     case ParseCommandInfo::BuiltinPOPD :
  79         if (! dirstack_.empty()) {
  80             cwd_ = dirstack_.back();
  81             dirstack_.pop_back();
  82         }
  83         break;
  84
  85     case ParseCommandInfo::BuiltinEXIT :
  86         throw ExitException();
  87     }
  88     return true;
  89 }
  90
  91 prefix_ bool senf::console::Executor::chdir(ParseCommandInfo::argument_value_type const & path)
  92 {
  93     if (path.size() == 1 && path.begin()->value() == "-") {
  94         if (oldCwd_.expired()) {
  95             oldCwd_ = cwd_;
  96             cwd_ = boost::static_pointer_cast<DirectoryNode>(
  97                 root().shared_from_this());
  98         } else
  99             swap(cwd_, oldCwd_);
 100     }
 101     else {
 102         try {
 103             DirectoryNode::ptr dir (cwd_.lock());
 104             ParseCommandInfo::token_iterator i (path.begin());
 105             ParseCommandInfo::token_iterator const i_end (path.end());
 106             if (i != i_end && i->value().empty()) {
 107                 dir = boost::static_pointer_cast<DirectoryNode>(
 108                     root().shared_from_this());
 109                 ++ i;
 110             }
 111             for (; i != i_end; ++i) {
 112                 if (i->value() == "..") {
 113                     dir = dir->parent();
 114                     if (! dir)
 115                         dir = boost::static_pointer_cast<DirectoryNode>(
 116                             root().shared_from_this());
 117                 }
 118                 else if (! i->value().empty() && i->value() != ".")
 119                     dir = boost::static_pointer_cast<DirectoryNode>(
 120                         (*dir)[i->value()].shared_from_this());
 121             }
 122             oldCwd_ = cwd_;
 123             cwd_ = dir;
 124         }
 125         catch (std::bad_cast &) {
 126             return false;
 127         }
 128         catch (UnknownNodeNameException &) {
 129             return false;
 130         }
 131     }
 132     return true;
 133 }
 134
 135 ///////////////////////////////cc.e////////////////////////////////////////
 136 #undef prefix_
 137 //#include "Executor.mpp"
 138
 139 \f
 140 // Local Variables:
 141 // mode: c++
 142 // fill-column: 100
 143 // comment-column: 40
 144 // c-file-style: "senf"
 145 // indent-tabs-mode: nil
 146 // ispell-local-dictionary: "american"
 147 // compile-command: "scons -u test"
 148 // End: