cdr_op_ci.cpp

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//
// cdr_op_ci.cpp,v 1.21 2003/10/28 18:30:38 bala Exp
//

// ============================================================================
//
// = LIBRARY
//    TAO IDL
//
// = FILENAME
//    union_branch_cdr_op_ci.cpp
//
// = DESCRIPTION
//    Visitor generating code for Union_Branch in the client stubs file.
//
// = AUTHOR
//    Aniruddha Gokhale
//
// ============================================================================

ACE_RCSID (be_visitor_union_branch,
           cdr_op_ci,
           "cdr_op_ci.cpp,v 1.21 2003/10/28 18:30:38 bala Exp")

// **********************************************
//  Visitor for union_branch in the client stubs file.
// **********************************************

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

be_visitor_union_branch_cdr_op_ci::~be_visitor_union_branch_cdr_op_ci (void)
{
}

// Visit the union_branch node.
int
be_visitor_union_branch_cdr_op_ci::visit_union_branch (be_union_branch *node)
{
  be_type *bt = be_type::narrow_from_decl (node->field_type ());

  if (!bt)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_union_branch - "
                         "Bad union_branch type\n"),
                        -1);
    }

  this->ctx_->node (node);

  if (bt->accept (this) == -1)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_union_branch - "
                         "codegen for union_branch type failed\n"),
                        -1);
    }

  return 0;
}

int
be_visitor_union_branch_cdr_op_ci::visit_array (be_array *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  // Retrieve the union_branch node.
  be_union_branch *f = this->ctx_->be_node_as_union_branch ();

  if (!f)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_array - "
                         "cannot retrieve union_branch node\n"),
                        -1);
    }

  // For anonymous arrays, the type name has a _ prepended. We compute the
  // fullname with or without the underscore and use it later on.
  char fname [NAMEBUFSIZE];  // to hold the full and

  // Save the node's local name and full name in a buffer for quick
  // use later on.
  ACE_OS::memset (fname,
                  '\0',
                  NAMEBUFSIZE);

  if (!this->ctx_->alias () // not a typedef
      && node->is_child (this->ctx_->scope ()))
    {
      // For anonymous arrays ...
      // we have to generate a name for us that has an underscore
      // prepended to our local name. This needs to be inserted after
      // the parents's name.
      if (node->is_nested ())
        {
          be_decl *parent =
            be_scope::narrow_from_scope (node->defined_in ())->decl ();
          ACE_OS::sprintf (fname,
                           "%s::_%s",
                           parent->full_name (),
                           node->local_name ()->get_string ());
        }
      else
        {
          ACE_OS::sprintf (fname,
                           "_%s",
                           node->full_name ());
        }
    }
  else
    {
      // Typedefed node.
      ACE_OS::sprintf (fname, "%s", node->full_name ());
    }

  // Check what is the code generations substate. Are we generating code for
  // the in/out operators for our parent or for us?
  switch (this->ctx_->sub_state ())
    {
    case TAO_CodeGen::TAO_CDR_INPUT:
      *os << fname << " _tao_union_tmp;" << be_nl
          << fname << "_forany _tao_union_helper (" 
          << be_idt << be_idt_nl
          << "_tao_union_tmp" << be_uidt_nl
          << ");" << be_uidt_nl
          << "result = strm >> _tao_union_helper;" << be_nl << be_nl
          << "if (result)" << be_idt_nl
          << "{" << be_idt_nl
          << "_tao_union." << f->local_name ()
          << " (_tao_union_tmp);" << be_nl
          << "_tao_union._d (_tao_discriminant);" << be_uidt_nl
          << "}" << be_uidt;

      return 0;

    case TAO_CodeGen::TAO_CDR_OUTPUT:
      *os << fname << "_forany _tao_union_tmp (" << be_idt << be_idt_nl
          << "_tao_union."
          << f->local_name () << " ()" << be_uidt_nl
          <<");" << be_uidt_nl
          << "result = strm << _tao_union_tmp;";
      return 0;

    case TAO_CodeGen::TAO_CDR_SCOPE:
      // This is done in cdr_op_cs.cpp  and hacked into *.i.
      break;
    default:
      // Error.
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_array - "
                         "bad sub state\n"),
                        -1);
    }

  // If not a typedef and we are defined in the use scope, we must be defined.

  if (!this->ctx_->alias () // not a typedef
      && node->is_child (this->ctx_->scope ()))
    {
      // This is the case for anonymous arrays.

      // Instantiate a visitor context with a copy of our context. This info
      // will be modified based on what type of node we are visiting
      be_visitor_context ctx (*this->ctx_);
      ctx.node (node);

      // First generate the declaration.
      be_visitor_array_cdr_op_ci visitor (&ctx);

      if (visitor.visit_array (node) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                             "visit_array - "
                             "codegen failed\n"),
                            -1);
        }
    }

  return 0;
}

int
be_visitor_union_branch_cdr_op_ci::visit_enum (be_enum *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  // Retrieve the union_branch node
  be_union_branch *f = this->ctx_->be_node_as_union_branch ();

  if (!f)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_array - "
                         "cannot retrieve union_branch node\n"),
                        -1);
    }

  // Check what is the code generations substate. Are we generating code for
  // the in/out operators for our parent or for us?
  switch (this->ctx_->sub_state ())
    {
    case TAO_CodeGen::TAO_CDR_INPUT:
      *os << node->name () << " _tao_union_tmp"
          << ";" << be_nl
          << "result = strm >> _tao_union_tmp;" << be_nl
          << "if (result)" << be_idt_nl
          << "{" << be_idt_nl
          << "_tao_union." << f->local_name ()
          << " (_tao_union_tmp);" << be_nl
          << "_tao_union._d (_tao_discriminant);" << be_uidt_nl
          << "}" << be_uidt;

      return 0;

    case TAO_CodeGen::TAO_CDR_OUTPUT:
      *os << "result = strm << _tao_union." << f->local_name () << " ();";
      return 0;

    case TAO_CodeGen::TAO_CDR_SCOPE:
      // Proceed further.
      break;
    default:
      // Error.
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_enum - "
                         "bad sub state\n"),
                        -1);
    }

  // Not a typedef and node is defined inside the union. Otherwise the cdr
  // operator is generated elsewhere.
  if (node->node_type () != AST_Decl::NT_typedef
      && node->is_child (this->ctx_->scope ()))
    {
      // Instantiate a visitor context with a copy of our context. This info
      // will be modified based on what type of node we are visiting.
      be_visitor_context ctx (*this->ctx_);
      ctx.node (node);
      be_visitor_enum_cdr_op_ci visitor (&ctx);

      if (visitor.visit_enum (node) == -1)
        {
          ACE_ERROR_RETURN ((LM_ERROR,
                             "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                             "visit_enum - "
                             "codegen failed\n"),
                            -1);
        }
    }

  return 0;
}

int
be_visitor_union_branch_cdr_op_ci::visit_interface (be_interface *node)
{
  TAO_OutStream *os = this->ctx_->stream ();

  // Retrieve the union_branch node.
  be_union_branch *f = this->ctx_->be_node_as_union_branch ();

  if (!f)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_interface - "
                         "cannot retrieve union_branch node\n"),
                        -1);
    }

  // Check what is the code generations substate. Are we generating code for
  // the in/out operators for our parent or for us?
  switch (this->ctx_->sub_state ())
    {
    case TAO_CodeGen::TAO_CDR_INPUT:
      if (node->is_local ())
        {
          *os << "result = 0;";
        }
      else
        {
          *os << node->name () << "_var _tao_union_tmp;" << be_nl
              << "result = strm >> _tao_union_tmp.inout ();" << be_nl << be_nl
              << "if (result)" << be_idt_nl
              << "{" << be_idt_nl
              << "_tao_union."
              << f->local_name () << " (_tao_union_tmp.in ());" << be_nl
              << "_tao_union._d (_tao_discriminant);" << be_uidt_nl
              << "}" << be_uidt;
        }

      break;

    case TAO_CodeGen::TAO_CDR_OUTPUT:
      if (node->is_defined ())
        {
          *os << "result = _tao_union."
              << f->local_name () << " ()->marshal (strm);";
        }
      else
        {
          *os << "result =" << be_idt_nl
              << "TAO::Objref_Traits<" << node->name () << ">::tao_marshal ("
              << be_idt << be_idt_nl
              << "_tao_union." << f->local_name () << " ()," << be_nl
              << "strm" << be_uidt_nl
              << ");" << be_uidt << be_uidt;
        }

      break;

    case TAO_CodeGen::TAO_CDR_SCOPE:
      // Nothing to be done because an interface cannot be declared inside a
      // union.
      break;

    default:
      // Error.
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%N:%l) be_visitor_union_branch_cdr_op_ci::"
                         "visit_interface - "
                         "bad sub state\n"),
                        -1);
    }

  return 0;
}

int
be_visitor_union_branch_cdr_op_ci::visit_interface_fwd (be_interface_fwd *node)