C++ TAO_InputCDR::get_codebase_url_map方法代码示例

void
TAO::Unknown_IDL_Type::_tao_decode (TAO_InputCDR & cdr)
{
  // @@ (JP) The following code depends on the fact that
  //         TAO_InputCDR does not contain chained message blocks,
  //         otherwise <begin> and <end> could be part of
  //         different buffers!

  // This will be the start of a new message block.
  char const * const begin = cdr.rd_ptr ();

  // Skip over the next argument.
  TAO::traverse_status const status =
    TAO_Marshal_Object::perform_skip (this->type_, &cdr);

  if (status != TAO::TRAVERSE_CONTINUE)
    {
      throw ::CORBA::MARSHAL ();
    }

  // This will be the end of the new message block.
  char const * const end = cdr.rd_ptr ();

  // The ACE_CDR::mb_align() call can shift the rd_ptr by up to
  // ACE_CDR::MAX_ALIGNMENT - 1 bytes. Similarly, the offset adjustment
  // can move the rd_ptr by up to the same amount. We accommodate
  // this by including 2 * ACE_CDR::MAX_ALIGNMENT bytes of additional
  // space in the message block.
  size_t const size = end - begin;

  ACE_Message_Block new_mb (size + 2 * ACE_CDR::MAX_ALIGNMENT);

  ACE_CDR::mb_align (&new_mb);
  ptrdiff_t offset = ptrdiff_t (begin) % ACE_CDR::MAX_ALIGNMENT;

  if (offset < 0)
    {
      offset += ACE_CDR::MAX_ALIGNMENT;
    }

  new_mb.rd_ptr (offset);
  new_mb.wr_ptr (offset + size);

  ACE_OS::memcpy (new_mb.rd_ptr (), begin, size);

  this->cdr_.reset (&new_mb, cdr.byte_order ());
  this->cdr_.char_translator (cdr.char_translator ());
  this->cdr_.wchar_translator (cdr.wchar_translator ());

  this->cdr_.set_repo_id_map (cdr.get_repo_id_map ());
  this->cdr_.set_codebase_url_map (cdr.get_codebase_url_map ());
  this->cdr_.set_value_map (cdr.get_value_map ());

  // Take over the GIOP version, the input cdr can have a different
  // version then our current GIOP version.
  ACE_CDR::Octet major_version;
  ACE_CDR::Octet minor_version;
  cdr.get_version (major_version, minor_version);
  this->cdr_.set_version (major_version, minor_version);
}

CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_codebase_url_indirection (TAO_InputCDR &strm,
                                                           ACE_CString& codebase_url)
{
  CORBA::Long offset = 0;
  if (!strm.read_long (offset) ||  offset >= 0)
  {
    return false;
  }

  void* pos = strm.rd_ptr () + offset - sizeof (CORBA::Long);

  if (strm.get_codebase_url_map()->get()->find (pos, codebase_url) != 0)
    {
      throw CORBA::INTERNAL ();
    }
  else if (TAO_debug_level)
    {
      TAOLIB_DEBUG ((LM_DEBUG,
        ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_unmarshal_codebase_url_indirection, found %x=%C\n"),
        pos, codebase_url.c_str ()));
    }

  return 1;
}

CORBA::Boolean
CORBA::ValueBase::_tao_unmarshal_value_indirection_pre (TAO_InputCDR &strm,
                                                        TAO_InputCDR &indirected_strm)
{
  CORBA::Long offset = 0;
  if (!strm.read_long (offset) ||  offset >= 0)
    {
      return false;
    }

  size_t const buffer_size = -(offset) + sizeof (CORBA::Long);
  // Cribbed from tc_demarshal_indirection in Typecode_CDR_Extraction.cpp
  indirected_strm = TAO_InputCDR (strm.rd_ptr () + offset - sizeof (CORBA::Long),
    buffer_size,
    strm.byte_order ());

  indirected_strm.set_repo_id_map (strm.get_repo_id_map ());
  indirected_strm.set_codebase_url_map (strm.get_codebase_url_map ());
  indirected_strm.set_value_map (strm.get_value_map ());
  return indirected_strm.good_bit ();
}

CORBA::Boolean
CORBA::ValueBase::_tao_read_codebase_url (TAO_InputCDR& strm,
                                          ACE_CString& codebase_url)
{
  CORBA::ULong length = 0;

  size_t buffer_size = strm.length();

  if (!strm.read_ulong (length))
    {
      return 0;
    }

  VERIFY_MAP (TAO_InputCDR, codebase_url_map, Codebase_URL_Map);
  char * pos = strm.rd_ptr();

  // 'length' may not be the codebase url length - it could be the
  // FFFFFFF indirection marker instead. If it is an indirection marker, we
  // get the offset following the indirection marker, otherwise we can follow
  // the same logic using the offset to simply rewind to the start of length
  // and re-read the length as part of the string
  if (TAO_OBV_GIOP_Flags::is_indirection_tag (length))
    {
      return _tao_unmarshal_codebase_url_indirection (strm, codebase_url);
    }

  pos -= sizeof (CORBA::ULong);

  // Cribbed from tc_demarshal_indirection in Typecode_CDR_Extraction.cpp
  TAO_InputCDR url_stream (pos,
                          buffer_size,
                          strm.byte_order ());

  if (!url_stream.good_bit ())
    {
      return 0;
    }

  if (! url_stream.read_string (codebase_url))
    return 0;

  // It's possible the codebase url is read again from an indirection stream,
  // so make sure the codebase url is the same.
  ACE_CString mapped_url;
  if (strm.get_codebase_url_map ()->get()->find (pos, mapped_url) == 0)
  {
    if (TAO_debug_level)
    {
      TAOLIB_DEBUG ((LM_DEBUG,
        ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_codebase_url, found %x=%C\n"),
        pos, mapped_url.c_str ()));
    }
    if (ACE_OS::strcmp (mapped_url.c_str (), codebase_url.c_str ()) != 0)
      throw CORBA::INTERNAL ();
  }
  else if (strm.get_codebase_url_map ()->get()->bind (pos, codebase_url) != 0)
  {
    throw CORBA::INTERNAL ();
  }
  else
  {
    if (TAO_debug_level)
    {
      TAOLIB_DEBUG ((LM_DEBUG,
        ACE_TEXT ("TAO (%P|%t) - %N:%l ValueBase::_tao_read_codebase_url, bound %x=%C\n"),
        pos, codebase_url.c_str ()));
    }
  }

  // Since the codebase url is always read from the indirection cdr we have to skip
  // the main CDR forward if we were in fact reading from the current
  // location and not rewinding back some offset.

  strm.skip_bytes (length);

  return 1;
}