argument.cpp

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//
// argument.cpp,v 1.24 2003/10/28 18:30:38 bala Exp
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    argument.cpp
//
// = DESCRIPTION
//    Visitor that calls the visitor for arguments.
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_operation, 
           argument, 
           "argument.cpp,v 1.24 2003/10/28 18:30:38 bala Exp")

// ************************************************************
// Generic operation visitor to handle the pre/post
// do_static_call/upcall stuff with arguments.
// ************************************************************

be_visitor_operation_argument::be_visitor_operation_argument (
    be_visitor_context *ctx
  )
  : be_visitor_operation (ctx)
{
}

be_visitor_operation_argument::~be_visitor_operation_argument (void)
{
}

int
be_visitor_operation_argument::post_process (be_decl *bd)
{
  TAO_OutStream *os = this->ctx_->stream ();

  // If we are not the last parameter, we insert a comma. This is only
  // applicable for the upcalls or the call to (de)marshal that we use in the
  // interpreted marshaling.
  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OPERATION_ARG_UPCALL_SS:
    case TAO_CodeGen::TAO_OPERATION_ARG_DEMARSHAL_SS:
    case TAO_CodeGen::TAO_OPERATION_ARG_MARSHAL_SS:
      if (!this->last_node (bd))
        {
          *os << "," << be_nl;
        }

      break;
    case TAO_CodeGen::TAO_OPERATION_COLLOCATED_ARG_UPCALL_SS:
      if (!this->last_node (bd))
        {
          *os << ",";
        }

      break;
    default:
      break;
    }

  return 0;
}

int
be_visitor_operation_argument::visit_operation (be_operation *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  // All we do is hand over code generation to our scope.
  if (this->visit_scope (node) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_operation_argument::"
                         "visit_operation - "
                         "codegen for scope failed\n"),
                        -1);
    }

  // If we are supporting the alternate mapping, we must pass the
  // ACE_ENV_ARG_PARAMETER as the last parameter.
  if (!be_global->exception_support ())
    {
      switch (this->ctx_->state ())
        {
        case TAO_CodeGen::TAO_OPERATION_ARG_UPCALL_SS:
        case TAO_CodeGen::TAO_OPERATION_COLLOCATED_ARG_UPCALL_SS:
          // Applicable only to these cases where the actual upcall is made.

          // Use ACE_ENV_SINGLE_ARG_DECL or ACE_ENV_ARG_DECL depending on
          // whether the operation node has parameters.
          if (node->argument_count () > 0)
            {
              *os << be_nl << "ACE_ENV_ARG_PARAMETER";
            }
          else
            {
              *os << be_nl << "ACE_ENV_SINGLE_ARG_PARAMETER";
            }

          break;
        default:
          break;
        }
    }

  return 0;
}

int
be_visitor_operation_argument::visit_argument (be_argument *node)
{
  // Get the visitor that will dump the argument's mapping in the operation
  // signature.
  be_visitor_context ctx (*this->ctx_);

  // first grab the interface definition inside which this operation is
  // defined. We need this since argument types may very well be declared
  // inside the scope of the interface node. In such cases, we would like to
  // generate the appropriate relative scoped names.
  be_operation *op = this->ctx_->be_scope_as_operation ();

  if (!op)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad operation\n"),
                        -1);
    }

  // We need the interface node in which this operation was defined. However,
  // if this operation node was an attribute node in disguise, we get this
  // information from the context.
  be_interface *intf;
  intf = this->ctx_->attribute ()
    ? be_interface::narrow_from_scope (this->ctx_->attribute ()->defined_in ())
    : be_interface::narrow_from_scope (op->defined_in ());

  if (!intf)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_arglist::"
                         "visit_argument - "
                         "Bad interface\n"),
                        -1);
    }

  ctx.scope (intf);
  int status = 0;

  switch (this->ctx_->state ())
    {
    case TAO_CodeGen::TAO_OPERATION_ARG_INVOKE_CS:
      {
        be_visitor_args_invoke_cs visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OPERATION_ARG_DECL_SS:
      {
        be_visitor_args_vardecl_ss visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OPERATION_ARG_DEMARSHAL_SS:
      {
        be_visitor_args_marshal_ss visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OPERATION_ARG_MARSHAL_SS:
      {
        be_visitor_args_marshal_ss visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OPERATION_COLLOCATED_ARG_UPCALL_SS:
      {
        ctx.state (TAO_CodeGen::TAO_ARGUMENT_COLLOCATED_UPCALL_SS);
        be_visitor_args_upcall_ss visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    case TAO_CodeGen::TAO_OPERATION_ARG_UPCALL_SS:
      {
        be_visitor_args_upcall_ss visitor (&ctx);
        status = node->accept (&visitor);
        break;
      }
    default:
      {
        ACE_ERROR_RETURN ((LM_ERROR,
                           "(%N:%l) be_visitor_argument::"
                           "visit_argument - "
                           "Bad context\n"),
                          -1);
      }
    }

  if (status == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_argument::"

                         "visit_argument - "
                         "codegen for argument failed\n"),
                        -1);
    }

  return 0;
}