scalar.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__SCALAR_HPP_ )
#define _OESS_1__TLV__SCALAR_HPP_

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

#include <string>

#include <auto_ptr_3/h/vect_ptr.hpp>

#include <oess_1/defs/h/ex.hpp>

#include <oess_1/io/h/bin_data_size.hpp>
#include <oess_1/io/h/subbinstream.hpp>

#include <oess_1/tlv/h/base.hpp>
#include <oess_1/tlv/h/default_processors.hpp>
#include <oess_1/tlv/h/errno.hpp>

namespace oess_1
{

namespace tlv
{

//
// scalar_tlv_t
//


template< class Tag_type,
  class Scalar,
  class Tag_processor = default_tag_processor_t< Tag_type >,
  class Length_processor = default_length_processor_t< Tag_type > >
class scalar_tlv_t :
  public tlv_base_t
{
  public :
    typedef Scalar value_type_t;

    typedef scalar_tlv_t< Tag_type, Scalar,
        Tag_processor, Length_processor >
      self_t;

  private :
    Tag_processor m_tag;

    Length_processor  m_length;

    Scalar  m_value;

  public :
    scalar_tlv_t( Tag_type id )
      :
        m_tag( id ),
        m_value()
    {
    }

    scalar_tlv_t(
      Tag_type id,
      const Scalar & value )
      :
        m_tag( id ),
        m_value( value )
    {
    }

    scalar_tlv_t(
      const self_t & o )
      :
        m_tag( o.m_tag ),
        m_length( o.m_length ),
        m_value( o.m_value )
    {
    }

    virtual ~scalar_tlv_t()
    {
    }

    self_t &
    operator=( const self_t & o )
    {
      if( &o != this )
      {
        m_tag = o.m_tag;
        m_length = o.m_length;
        m_value = o.m_value;
      }
      return *this;
    }

    const Scalar &
    query_value() const
    {
      return m_value;
    }

    void
    set_value(
      const Scalar & value )
    {
      m_value = value;
    }

    virtual default_tag_type_t
    tlv_tag() const
    {
      return m_tag.query_tag();
    }

    virtual size_t
    tlv_size() const
    {
      size_t length = oess_1::io::bin_data_size_t<
        Scalar >::image_size;
      length += m_length.tlv_length_size( length );
      length += m_tag.tlv_tag_size();

      return length;
    }


    virtual void
    tlv_unpack(
      oess_1::io::ibinstream_t & s,
      default_tag_type_t )
    {
      size_t length;
      m_length.tlv_unpack_length( s,  length );
      if( length )
      {
        oess_1::io::isubbinstream_t substream( s, length );
        substream >> m_value;
      }
      else
      {
        OESS_THROW_PHYSIC( err::c_zero_length,
          "awaiting length: " << oess_1::io::bin_data_size_t<
            Scalar >::image_size )
      }
    }


    virtual void
    tlv_pack(
      oess_1::io::obinstream_t & s ) const
    {
      size_t length =
        oess_1::io::bin_data_size_t< Scalar >::image_size;

      m_tag.tlv_pack_tag( s );
      m_length.tlv_pack_length( s, length );
      s << m_value;
    }
};

} /* namespace tlv */

} /* namespace oess_1 */

#endif

---