// $Id: ast_sequence.cpp 89076 2010-02-18 22:54:36Z parsons $

/*

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*/

// AST_Sequence nodes represent IDL sequence declarations.
// AST_Sequence is a subclass of AST_ConcreteType.
// AST_Sequence nodes have a maximum size (an AST_Expression which
// must evaluate to a positive integer) and a base type (a subclass
// of AST_Type).

#include "ast_sequence.h"
#include "ast_typedef.h"
#include "ast_expression.h"
#include "ast_param_holder.h"
#include "ast_visitor.h"

#include "utl_identifier.h"
#include "utl_err.h"

#include "global_extern.h"
#include "fe_extern.h"

#include "ace/Log_Msg.h"
#include "ace/OS_Memory.h"
#include "ace/OS_NS_string.h"

AST_Decl::NodeType const
AST_Sequence::NT = AST_Decl::NT_sequence;

AST_Sequence::AST_Sequence (AST_Expression *ms,
                            AST_Type *bt,
                            UTL_ScopedName *n,
                            bool local,
                            bool abstract)
  : COMMON_Base (bt->is_local () || local,
                 abstract),
    AST_Decl (AST_Decl::NT_sequence,
              n,
              true),
    AST_Type (AST_Decl::NT_sequence,
              n),
    AST_ConcreteType (AST_Decl::NT_sequence,
                      n),
    pd_max_size (ms),
    pd_base_type (bt),
    owns_base_type_ (false)
{
  AST_Decl::NodeType bnt = bt->node_type ();
    
  if (bnt == AST_Decl::NT_param_holder)
    {
      AST_Param_Holder *ph =
        AST_Param_Holder::narrow_from_decl (bt);
        
      if (ph->info ()->type_ == AST_Decl::NT_const)
        {
          idl_global->err ()->not_a_type (bt);
          bt->destroy ();
          delete bt;
          bt = 0;
          throw Bailout ();
        }
    }

  // Check if we are bounded or unbounded. An expression value of 0 means
  // unbounded. If our bound is a template parameter, skip the
  // check altogether, this node will trigger no code generation.
  if (ms->param_holder () == 0)
    {
      if (ms->ev ()->u.ulval == 0)
        {
          this->unbounded_ = true;
        }
      else
        {
          this->unbounded_ = false;
        }
    }

  // A sequence data type is always VARIABLE.
  this->size_type (AST_Type::VARIABLE);

  AST_Decl::NodeType nt = bt->node_type ();

  this->owns_base_type_ =
    nt == AST_Decl::NT_array
    || nt == AST_Decl::NT_sequence
    || nt == AST_Decl::NT_param_holder;
}

AST_Sequence::~AST_Sequence (void)
{
}

// Public operations.

bool
AST_Sequence::in_recursion (ACE_Unbounded_Queue<AST_Type *> &list)
{
  // We should calculate this only once. If it has already been
  // done, just return it.
  if (this->in_recursion_ != -1)
    {
      return this->in_recursion_;
    }

  AST_Type *type = AST_Type::narrow_from_decl (this->base_type ());
  AST_Decl::NodeType nt = type->node_type ();

  if (!type)
    {
      ACE_ERROR_RETURN ((LM_ERROR,
                         ACE_TEXT ("(%N:%l) AST_Sequence::")
                         ACE_TEXT ("in_recursion - ")
                         ACE_TEXT ("bad base type\n")),
                        0);
    }

  if (type->node_type () == AST_Decl::NT_typedef)
    {
      AST_Typedef *td = AST_Typedef::narrow_from_decl (type);
      type = td->primitive_base_type ();
      nt = type->node_type ();
    }

  if (nt != AST_Decl::NT_struct
      && nt != AST_Decl::NT_union
      && nt != AST_Decl::NT_valuetype
      && nt != AST_Decl::NT_sequence)
    {
      return false;
    }

  if (this->match_names (type, list))
    {
      // They match.
      this->in_recursion_ = 1;
      idl_global->recursive_type_seen_ = true;
    }
  else
    {
      // Check the element type.
      list.enqueue_tail (type);
      this->in_recursion_ = type->in_recursion (list);

      if (this->in_recursion_ == 1)
        {
          idl_global->recursive_type_seen_ = true;
        }
    }

  return this->in_recursion_;
}

// Redefinition of inherited virtual operations.

// Dump this AST_Sequence node to the ostream o.
void
AST_Sequence::dump (ACE_OSTREAM_TYPE &o)
{
  this->dump_i (o, "sequence <");
  this->pd_base_type->dump (o);
  this->dump_i (o, ", ");
  this->pd_max_size->dump (o);
  this->dump_i (o, ">");
}

int
AST_Sequence::ast_accept (ast_visitor *visitor)
{
  return visitor->visit_sequence (this);
}

// Data accessors.

AST_Expression *
AST_Sequence::max_size (void)
{
  return this->pd_max_size;
}

AST_Type *
AST_Sequence::base_type (void) const
{
  return this->pd_base_type;
}

bool
AST_Sequence::unbounded (void) const
{
  return this->unbounded_;
}

bool
AST_Sequence::legal_for_primary_key (void) const
{
  return this->base_type ()->legal_for_primary_key ();
}

bool
AST_Sequence::is_defined (void)
{
  return this->pd_base_type->is_defined ();
}

void
AST_Sequence::destroy (void)
{
  if (this->owns_base_type_)
    {
      this->pd_base_type->destroy ();
      delete this->pd_base_type;
      this->pd_base_type = 0;
    }

  this->pd_max_size->destroy ();
  delete this->pd_max_size;
  this->pd_max_size = 0;

  this->AST_ConcreteType::destroy ();
}

IMPL_NARROW_FROM_DECL(AST_Sequence)
