wiselib.testing/algorithms/routing/lazy/lazy_message.h

Go to the documentation of this file.

/***************************************************************************
** This file is part of the generic algorithm library Wiselib.           **
** Copyright (C) 2008,2009 by the Wisebed (www.wisebed.eu) project.      **
**                                                                       **
** The Wiselib is free software: you can redistribute it and/or modify   **
** it under the terms of the GNU Lesser General Public License as        **
** published by the Free Software Foundation, either version 3 of the    **
** License, or (at your option) any later version.                       **
**                                                                       **
** The Wiselib 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 Lesser General Public License for more details.                   **
**                                                                       **
** You should have received a copy of the GNU Lesser General Public      **
** License along with the Wiselib.                                       **
** If not, see <http://www.gnu.org/licenses/>.                           **
***************************************************************************/
#ifndef __LAZY_MSG_H__
#define __LAZY_MSG_H__

namespace wiselib
{
   template<typename Os_P,
      typename Radio_P>
   class LazyMessageType
   {
   public:
      typedef Os_P Os;
      typedef Radio_P Radio;
      typedef typename Radio::block_data_t block_data_t;
      typedef typename Radio::size_t size_t;
      typedef typename Radio::message_id_t message_id_t;
      // --------------------------------------------------------------------
      inline LazyMessageType();
      // --------------------------------------------------------------------
      inline message_id_t msg_id()
      {
         return read<Os, block_data_t, message_id_t>( buffer );
      };
      // --------------------------------------------------------------------
      inline void set_msg_id( message_id_t id )
      {
         write<Os, block_data_t, message_id_t>( buffer, id ); 
      }
      // --------------------------------------------------------------------
      inline size_t payload_size()
      {
         return read<Os, block_data_t, size_t>(buffer + PAYLOAD_POS); 
      }
      // --------------------------------------------------------------------
      inline block_data_t* payload()
      { 
         return buffer + PAYLOAD_POS + sizeof(size_t); 
      }
      // --------------------------------------------------------------------
      inline void set_payload( size_t len, block_data_t *buf )
      {
         write<Os, block_data_t, size_t>(buffer + PAYLOAD_POS, len);
         memcpy( buffer + PAYLOAD_POS + sizeof(size_t), buf, len);
      }
      // --------------------------------------------------------------------
      inline size_t buffer_size()
      { return PAYLOAD_POS + sizeof(size_t) + payload_size(); }
   
      enum data_positions
      {
         PAYLOAD_POS = sizeof(message_id_t)
      };
                private:
      block_data_t buffer[Radio::MAX_MESSAGE_LENGTH];
   };
   // -----------------------------------------------------------------------
   template<typename Os_P,
      typename Radio_P>
   LazyMessageType<Os_P, Radio_P>::
	LazyMessageType()
   {
      set_msg_id( 0 );
      size_t len = 0;
      write<Os, block_data_t, size_t>(buffer + PAYLOAD_POS, len);
   }
}
#endif