field_codec_id.h

// Copyright 2009-2017 Toby Schneider (http://gobysoft.org/index.wt/people/toby)
//                     GobySoft, LLC (for 2013-)
//                     Massachusetts Institute of Technology (for 2007-2014)
//                     Community contributors (see AUTHORS file)
//
//
// This file is part of the Dynamic Compact Control Language Library
// ("DCCL").
//
// DCCL 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 2.1 of the License, or
// (at your option) any later version.
//
// DCCL 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 DCCL.  If not, see <http://www.gnu.org/licenses/>.
#include "field_codec_fixed.h"
 
namespace dccl
{
    class DefaultIdentifierCodec : public TypedFieldCodec<uint32>
    {
      protected:
        virtual Bitset encode();
        virtual Bitset encode(const uint32& wire_value);
        virtual uint32 decode(Bitset* bits);
        virtual unsigned size();
        virtual unsigned size(const uint32& wire_value);
        virtual unsigned max_size();
        virtual unsigned min_size();
        virtual void validate() { }
 
      private:
        unsigned this_size(const uint32& wire_value);
        // maximum id we can fit in short or long header (MSB reserved to indicate
        // short or long header)
        enum { ONE_BYTE_MAX_ID = (1 << 7) - 1,
               TWO_BYTE_MAX_ID = (1 << 15) - 1};
            
        enum { SHORT_FORM_ID_BYTES = 1,
               LONG_FORM_ID_BYTES = 2 };
    };
}