Line data    Source code

       1             : /*
       2             :     Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
       3             : 
       4             :     This file is part of libzmq, the ZeroMQ core engine in C++.
       5             : 
       6             :     libzmq is free software; you can redistribute it and/or modify it under
       7             :     the terms of the GNU Lesser General Public License (LGPL) as published
       8             :     by the Free Software Foundation; either version 3 of the License, or
       9             :     (at your option) any later version.
      10             : 
      11             :     As a special exception, the Contributors give you permission to link
      12             :     this library with independent modules to produce an executable,
      13             :     regardless of the license terms of these independent modules, and to
      14             :     copy and distribute the resulting executable under terms of your choice,
      15             :     provided that you also meet, for each linked independent module, the
      16             :     terms and conditions of the license of that module. An independent
      17             :     module is a module which is not derived from or based on this library.
      18             :     If you modify this library, you must extend this exception to your
      19             :     version of the library.
      20             : 
      21             :     libzmq is distributed in the hope that it will be useful, but WITHOUT
      22             :     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      23             :     FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
      24             :     License for more details.
      25             : 
      26             :     You should have received a copy of the GNU Lesser General Public License
      27             :     along with this program.  If not, see <http://www.gnu.org/licenses/>.
      28             : */
      29             : 
      30             : #ifndef __ZMQ_V2_DECODER_HPP_INCLUDED__
      31             : #define __ZMQ_V2_DECODER_HPP_INCLUDED__
      32             : 
      33             : #include "decoder.hpp"
      34             : #include "decoder_allocators.hpp"
      35             : 
      36             : namespace zmq
      37             : {
      38             :     //  Decoder for ZMTP/2.x framing protocol. Converts data stream into messages.
      39             :     //  The class has to inherit from shared_message_memory_allocator because
      40             :     //  the base class calls allocate in its constructor.
      41             :     class v2_decoder_t :
      42             :             // inherit first from allocator to ensure that it is constructed before decoder_base_t
      43             :             public shared_message_memory_allocator,
      44             :             public decoder_base_t <v2_decoder_t, shared_message_memory_allocator>
      45             :     {
      46             :     public:
      47             :         v2_decoder_t (size_t bufsize_, int64_t maxmsgsize_);
      48             :         virtual ~v2_decoder_t ();
      49             : 
      50             :         //  i_decoder interface.
      51      640380 :         virtual msg_t *msg () { return &in_progress; }
      52             : 
      53             :     private:
      54             : 
      55             :         int flags_ready (unsigned char const*);
      56             :         int one_byte_size_ready (unsigned char const*);
      57             :         int eight_byte_size_ready (unsigned char const*);
      58             :         int message_ready (unsigned char const*);
      59             : 
      60             :         int size_ready(uint64_t size_, unsigned char const*);
      61             : 
      62             :         unsigned char tmpbuf [8];
      63             :         unsigned char msg_flags;
      64             :         msg_t in_progress;
      65             : 
      66             :         const int64_t maxmsgsize;
      67             : 
      68             :         v2_decoder_t (const v2_decoder_t&);
      69             :         void operator = (const v2_decoder_t&);
      70             :     };
      71             : 
      72             : }
      73             : 
      74             : #endif