base.hpp

См. документацию.

/*

Copyright (c) 2002-2005, Yauheni Akhotnikau
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

- Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

- The name of the author may not be used to endorse or promote products derived
from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.

*/

#if !defined( _OESS_1__TLV__BASE_HPP_ )
#define _OESS_1__TLV__BASE_HPP_

#include <oess_1/tlv/h/declspec.hpp>

#include <oess_1/io/h/binstream.hpp>

namespace oess_1
{

namespace tlv
{


typedef oess_1::uint_t  default_tag_type_t;

//
// tag_processor_t
//


class OESS_1__TLV__TYPE tag_processor_t
{
  public :
    virtual ~tag_processor_t();

    virtual size_t
    tlv_tag_size() const = 0;

    virtual void
    tlv_unpack_tag(
      oess_1::io::ibinstream_t & s ) = 0;

    virtual void
    tlv_pack_tag(
      oess_1::io::obinstream_t & s ) const = 0;

    virtual default_tag_type_t
    query_tag() const = 0;

    virtual void
    set_tag( const default_tag_type_t & value ) = 0;
};

//
// length_processor_t
//


class OESS_1__TLV__TYPE length_processor_t
{
  public :
    virtual ~length_processor_t();

    virtual size_t
    tlv_length_size(
      size_t value_length ) const = 0;

    virtual void
    tlv_unpack_length(
      oess_1::io::ibinstream_t & s,
      size_t & value_length ) = 0;

    virtual void
    tlv_pack_length(
      oess_1::io::obinstream_t & s,
      size_t value_length ) const = 0;
};

//
// tlv_base_t
//

class OESS_1__TLV__TYPE tlv_base_t
{
  public :
    virtual ~tlv_base_t();


    virtual default_tag_type_t
    tlv_tag() const = 0;


    virtual size_t
    tlv_size() const = 0;


    virtual void
    tlv_unpack(
      oess_1::io::ibinstream_t & s,
      default_tag_type_t tag_id ) = 0;


    virtual void
    tlv_pack(
      oess_1::io::obinstream_t & s ) const = 0;
};

//
// tlv_extractor_t
//


class  OESS_1__TLV__TYPE  tlv_extractor_t
{
  public :
    inline
    tlv_extractor_t(
      const tag_processor_t & tag_processor,
      tlv_base_t & tlv )
      :
        m_tag_processor( tag_processor ),
        m_tlv( tlv )
    {
    }

    inline void
    tlv_unpack( oess_1::io::ibinstream_t & s )
    {
      m_tlv.tlv_unpack( s, m_tag_processor.query_tag() );
    }

  private :
    const tag_processor_t & m_tag_processor;
    tlv_base_t &  m_tlv;
};


inline oess_1::io::ibinstream_t &
operator>>(
  oess_1::io::ibinstream_t & s,
  tlv_extractor_t & o )
{
  o.tlv_unpack( s );
  return s;
}

inline oess_1::io::obinstream_t &
operator<<(
  oess_1::io::obinstream_t & s,
  const tlv_base_t & o )
{
  o.tlv_pack( s );
  return s;
}

} /* namespace tlv */

} /* namespace oess_1 */

#endif

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