python_init.cc

// Copyright 2008 Michael Marsh, University of Maryland.
//
// This file is part of pydtn.
//
// pydtn is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// pydtn is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with pydtn.  If not, see <http://www.gnu.org/licenses/>.
//
// The views and conclusions contained in the software and documentation
// are those of the authors and should not be interpreted as representing
// official policies, either expressed or implied, of the University
// of Maryland.
//
// pydtn extends and embeds the Python interpreter, which is
// Copyright 2001-2006 Python Software Foundation, All Rights Reserved,
// and is released under the PSF License Agreement.
//
// RANLUX random number generation uses the Boost library,
// Copyright 1994-2006 by various authors (details in individual files),
// which is released under the Boost Software License, Version 1.0.

#include "Python.h"
#include "structmember.h"

#include "MobileNode.h"
#include "RandomWaypointNode.h"
#include "parsers.h"
#include "simlpy/interpreter_hooks.h"
#include "simlpy/Clock.h"
#include "simlpy/SimulationException.h"

#include <iostream>
#include <fstream>

using namespace Mobility;

#ifndef PyMODINIT_FUNC
#define PyMODINIT_FUNC extern "C" void
#endif

static char mobility_set_waypoint_doc[] =
"Set a waypoint for a mobile node.\n\
   \n\
   Calling syntax:\n\
   \n\
   pydtn.mobility.set_waypoint(<mnode>,<time>,<pause>,<pos>)\n\
   \n\
     <mnode> : an existing mobile node\n\
     <time>  : the time at which <mnode> should reach the waypoint,\n\
               given as\n\
                  [ seconds , microseconds ]\n\
     <pause> : the length of time at which <mnode> should pause\n\
               once the waypoint has been reached, given as\n\
                  [ seconds , microseconds ]\n\
     <pos>   : the waypoint as a list of two or three coordinates\n\
               If the list is length 2, then the z coordinate is\n\
               taken to be 0. (meters, real-valued)\n\
   \n\
   This method is useful for scheduling a number of waypoints before\n\
   the simulation begins.\n";

static PyObject*
mobility_set_waypoint( PyObject* self , PyObject* args )
{
   Entity::ArgList argList;
   build_arglist( argList, args );

   unsigned int nargs = argList.size();
   if ( nargs < 4 )
   {
      std::cerr << "set_waypoint() takes 4 arguments ("
                << nargs << " given)"
                << std::endl;
      return 0;
   }
   MobileNode* mn = 0;
   try
   {
      ItemWrapper item = resolve_symbol( argList[0] );
      if ( 0 != item.type.find( MobileNode::kIdentifier ) )
      {
         throw SimulationException( __FILE__ , __LINE__ );
      }
      mn = (MobileNode*)(item.item);
      if ( 0 == mn )
      {
         throw SimulationException( __FILE__ , __LINE__ );
      }
   }
   catch ( ... )
   {
      std::cerr << "The first argument of set_waypoint() must be a mobile node"
                << std::endl;
      throw;
   }

   Time t = parse_time(argList[1]);
   Time d = parse_time(argList[2]);

   Position pos = MobileNode::parse_position( argList[3] );

   mn->setWaypoint( Presence( t, pos, d ) );

   Py_INCREF(Py_None);
   return Py_None;
}

static PyMethodDef ExampleMethods[] =
{
   {"set_waypoint",mobility_set_waypoint,METH_VARARGS,
    mobility_set_waypoint_doc},
   {0,0,0,0} // sentinel
};

PyMODINIT_FUNC
init_mobility(void)
{
   add_entity( new Mobility::MobileNode );
   add_entity( new Mobility::RandomWaypointNode );
   (void) Py_InitModule("_mobility",ExampleMethods);
}

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