rettype_marshal_ss.cpp

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//
// rettype_marshal_ss.cpp,v 1.15 2003/12/31 21:28:04 bala Exp
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    rettype_marshal_ss.cpp
//
// = DESCRIPTION
//    Visitor generating the code that passes retval to the CDR operators. The
//    "OUTPUT" substate deals with the server side skeletons whereas the
//    "INPUT" substate deals with the client stubs. Also notice that the type
//    of parameter passed to the operator depends on the manner in which the
//    variable is declared i.e., in the skeleton, we may have _var types but
//    not in the stubs.
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_operation,
           rettype_marshal_ss,
           "rettype_marshal_ss.cpp,v 1.15 2003/12/31 21:28:04 bala Exp")

// ****************************************************************************
// visitor for arguments passing to the CDR operators.
// ****************************************************************************

be_visitor_operation_rettype_marshal_ss::
be_visitor_operation_rettype_marshal_ss (be_visitor_context *ctx)
  : be_visitor_decl (ctx)
{
}

be_visitor_operation_rettype_marshal_ss::
~be_visitor_operation_rettype_marshal_ss (void)
{
}

int be_visitor_operation_rettype_marshal_ss::visit_operation (
    be_operation *node
  )
{
  this->ctx_->node (node);

  be_type *bt = be_type::narrow_from_decl (node->return_type ());

  if (!bt)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_argument - "
                         "Bad argument type\n"),
                        -1);
    }

  // Different types have different mappings when used as in/out or
  // inout parameters. Let this visitor deal with the type

  TAO_OutStream *os = this->ctx_->stream ();

  *os << be_nl;

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "(_tao_out << ";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "(_tao_in >> ";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_operation - "
                         "Bad substate\n"),
                        -1);
    }

  if (bt->accept (this) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_operation - "
                         "cannot accept visitor\n"),
                        -1);
    }

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << ")";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << ")";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_operation - "
                         "Bad substate\n"),
                        -1);
    }

  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_array (be_array *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval_forany";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval_forany";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_array - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_enum (be_enum *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_enum - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_interface (be_interface *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval.in ()";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval.inout ()";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_interface - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_interface_fwd (be_interface_fwd *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval.in ()";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval.inout ()";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_interface - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_valuetype (be_valuetype *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval.in ()";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval.inout ()";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_valuetype - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_valuetype_fwd (be_valuetype_fwd *)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      *os << "_tao_retval.in ()";
    }
  else if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_INPUT)
    {
      *os << "_tao_retval.inout ()";
    }
  else
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "be_visitor_operation_rettype_compiled_marshal::"
                         "visit_valuetype - "
                         "Bad substate\n"),
                        -1);
    }
  return 0;
}

int be_visitor_operation_rettype_marshal_ss::visit_predefined_type (be_predefined_type *node)
{
  TAO_OutStream *os = this->ctx_->stream (); // get output stream

  if (this->ctx_->sub_state () == TAO_CodeGen::TAO_CDR_OUTPUT)
    {
      switch (node->pt ())
        {
        case AST_PredefinedType::PT_pseudo:
        case AST_PredefinedType::PT_object:
          *os << "_tao_retval.in ()";
          break;
        case AST_PredefinedType::PT_any:
          *os << "_tao_retval.in ()";
          break;
        case AST_PredefinedType::PT_long:
        case AST_PredefinedType::PT_ulong:
        case AST_PredefinedType::PT_longlong: