ast_decl.cpp

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// ast_decl.cpp,v 1.55 2004/01/07 16:53:50 parsons Exp

/*

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*/

/*
 * AST_Decl is the base class for all AST nodes except AST_Expression.
 * AST_Decls have a node type (a value from the enum AST_Decl::NodeType)
 * and a name (a UTL_ScopedName).
 * Additionally AST_Decl nodes record the scope of definition, the
 * file name in which they were defined, the line on which they were
 * defined in that file, and a boolean denoting whether this is the
 * main file or an #include'd file.
 */

#include "ast_interface.h"
#include "ast_module.h"
#include "ast_array.h"
#include "ast_field.h"
#include "ast_structure.h"
#include "ast_sequence.h"
#include "ast_string.h"
#include "ast_typedef.h"
#include "ast_visitor.h"
#include "global_extern.h"
#include "nr_extern.h"
#include "utl_identifier.h"
#include "utl_scope.h"
#include "utl_err.h"
#include "ace/OS_NS_stdio.h"

// FUZZ: disable check_for_streams_include
#include "ace/streams.h"

ACE_RCSID (ast, 
           ast_decl, 
           "ast_decl.cpp,v 1.55 2004/01/07 16:53:50 parsons Exp")

COMMON_Base::COMMON_Base (idl_bool local,
                          idl_bool abstract)
  : is_local_ (local),
    is_abstract_ (abstract)
{
}

idl_bool
COMMON_Base::is_local (void)
{
  return this->is_local_;
}

idl_bool
COMMON_Base::is_abstract (void)
{
  return this->is_abstract_;
}

void
COMMON_Base::destroy (void)
{
}

// Constructor(s) and destructor.

AST_Decl::AST_Decl (void)
  : COMMON_Base (),
    repoID_ (0),
    flat_name_ (0),
    contains_wstring_ (-1),
    pd_imported (I_FALSE),
    pd_in_main_file (I_FALSE),
    pd_defined_in (0),
    pd_node_type (NT_module),
    pd_line (-1),
    pd_file_name (0),
    pd_local_name (0),
    pd_original_local_name (0),
    pd_added (I_FALSE),
    full_name_ (0),
    prefix_ (0),
    version_ (0),
    anonymous_ (I_FALSE),
    typeid_set_ (I_FALSE),
    last_referenced_as_ (0),
    prefix_scope_ (0)
{
}

AST_Decl::AST_Decl (NodeType nt,
                    UTL_ScopedName *n,
                    idl_bool anonymous)
  : COMMON_Base (),
    repoID_ (0),
    flat_name_ (0),
    contains_wstring_ (-1),
    pd_imported (idl_global->imported ()),
    pd_in_main_file (idl_global->in_main_file ()),
    pd_defined_in (idl_global->scopes ().depth () > 0
                     ? idl_global->scopes ().top ()
                     : 0),
    pd_node_type (nt),
    pd_line (idl_global->lineno ()),
    pd_file_name (idl_global->filename ()),
    pd_name (0),
    pd_local_name (n == 0 ? 0 : n->last_component ()->copy ()),
    pd_original_local_name (0),
    pd_added (I_FALSE),
    full_name_ (0),
    prefix_ (0),
    version_ (0),
    anonymous_ (anonymous),
    typeid_set_ (I_FALSE),
    last_referenced_as_ (0),
    prefix_scope_ (0)
{
  this->compute_full_name (n);

  char *prefix = 0;
  idl_global->pragma_prefixes ().top (prefix);

  if (prefix == 0)
    {
      this->prefix_ = ACE::strnew ("");
    }
  else
    {
      this->prefix_ = ACE::strnew (prefix);
    }

  if (n != 0)
    {
      // The function body creates its own copy.
      this->original_local_name (n->last_component ());
    }

  this->compute_repoID ();
}

AST_Decl::~AST_Decl (void)
{
}

// Private operations.

// Compute our private UTL_ScopedName member.
void
AST_Decl::compute_full_name (UTL_ScopedName *n)
{
  // This should happen only when we are a non-void predefined type,
  // in which case our scoped name has already been created by the
  // AST_PredefinedType constructor.
  if (n == 0)
    {
      return;
    }

  UTL_ScopedName *cn = 0;
  AST_Decl *d = 0;

  // Initialize this name to 0.
  this->pd_name = 0;

  // Global scope?
  if (this->defined_in () == 0)
    {
      this->pd_name = (UTL_IdList *) n->copy ();
      return;
    }

  // OK, not global. So copy name of containing scope, then
  // smash last cdr of copy with new component
  d = ScopeAsDecl (this->defined_in ());

  if (d != 0)
    {
      cn = d->name ();
    }

  if (cn != 0)
    {
      this->pd_name = (UTL_IdList *) cn->copy ();
    }

  if (this->pd_local_name != 0)
    {
      if (this->pd_name == 0)
        {
          ACE_NEW (this->pd_name,
                   UTL_ScopedName (this->pd_local_name->copy (),
                                   0));
        }
      else
        {
          UTL_ScopedName *conc_name = 0;
          ACE_NEW (conc_name,
                   UTL_ScopedName (this->pd_local_name->copy (),
                                   0));

          this->pd_name->nconc (conc_name);
        }
    }
}

void
AST_Decl::set_prefix_with_typeprefix_r (char *value,
                                        UTL_Scope *appeared_in)
{
  if (this->typeid_set_)
    {
      return;
    }

  if (this->prefix_scope_ != 0)
    {
      AST_Decl *decl = ScopeAsDecl (this->prefix_scope_);

      idl_bool overridden =
        decl->has_ancestor (ScopeAsDecl (appeared_in));

      if (overridden)
        {
          return;
        }
    }

  delete [] this->repoID_;
  this->repoID_ = 0;
  this->prefix (value);
  this->prefix_scope_ = appeared_in;

  UTL_Scope *s = DeclAsScope (this);

  if (s != 0)
    {
      AST_Decl *tmp = 0;
      UTL_Scope *s_tmp = 0;

      for (UTL_ScopeActiveIterator i (s, UTL_Scope::IK_decls); 
           !i.is_done ();
           i.next ())
        {
          tmp = i.item ();
          s_tmp = DeclAsScope (tmp);

          if (s_tmp == 0)
            {
              continue;
            }

          tmp->set_prefix_with_typeprefix_r (value,
                                             appeared_in);
        }
    }

  // This will recursively catch all previous openings of a module.
  if (this->node_type () == AST_Decl::NT_module)
    {
      AST_Decl **d = 0;
      AST_Module *m = AST_Module::narrow_from_decl (this);

      for (ACE_Unbounded_Set_Iterator<AST_Decl *> iter (m->previous ());
           !iter.done ();
           iter.advance ())
        {
          iter.next (d);

          if ((*d)->node_type () == AST_Decl::NT_pre_defined)
            {
              continue;
            }

          (*d)->set_prefix_with_typeprefix_r (value,
                                              appeared_in);
        }
    }

  this->compute_repoID ();
}

// Protected operations.

// Compute stringified fully scoped name.
void
AST_Decl::compute_full_name (void)
{
 if (this->full_name_ != 0)
    {
      return;
    }
  else
    {
      size_t namelen = 0;
      long first = I_TRUE;
      long second = I_FALSE;
      char *name = 0;

      for (UTL_IdListActiveIterator i (this->name ()); 
           !i.is_done (); 
           i.next ())
        {
          if (!first)
            {
              namelen += 2; // for "::"
            }
          else if (second)
            {
              first = second = I_FALSE;
            }

          // Print the identifier.
          name = i.item ()->get_string ();
          namelen += ACE_OS::strlen (name);

          if (first)
            {
              if (ACE_OS::strcmp (name, "") != 0)
                {
                  // Does not start with a "".
                  first = I_FALSE;
                }
              else
                {
                  second = I_TRUE;
                }
            }
        }

      ACE_NEW (this->full_name_,
               char[namelen + 1]);

      this->full_name_[0] = '\0';
      first = I_TRUE;
      second = I_FALSE;

      for (UTL_IdListActiveIterator j (this->name ()); 
           !j.is_done (); 
           j.next ())
        {
          if (!first)
            {
              ACE_OS::strcat (this->full_name_, "::");
            }
          else if (second)
            {
              first = second = I_FALSE;
            }

          // Print the identifier.
          name = j.item ()->get_string ();
          ACE_OS::strcat (this->full_name_, name);

          if (first)
            {
              if (ACE_OS::strcmp (name, "") != 0)
                {
                  // Does not start with a "".
                  first = I_FALSE;
                }
              else
                {
                  second = I_TRUE;
                }
            }
        }
    }
}

// Compute stringified repository ID.
void
AST_Decl::compute_repoID (void)
{
 if (this->repoID_ != 0)
    {
      return;
    }

  size_t namelen = 4; // for the prefix "IDL:"
  long first = I_TRUE;
  long second = I_FALSE;
  char *name = 0;
  const char *prefix = (this->prefix_ ? this->prefix_ : "");
  UTL_Scope *scope = this->defined_in ();
  const char *parent_prefix = 0;

  // If our prefix is empty, we check to see if an ancestor has one.
  while (ACE_OS::strcmp (prefix, "") == 0 && scope != 0)
    {
      AST_Decl *parent = ScopeAsDecl (scope);

      if (parent->node_type () == AST_Decl::NT_root
          && parent->imported ())
        {
          break;
        }

      parent_prefix = parent->prefix ();
      prefix = (parent_prefix ? parent_prefix : "");
      scope = parent->defined_in ();
    }

  // in the first loop compute the total length
  namelen += ACE_OS::strlen (prefix) + 1;

  const char *version = this->version_;
  scope = this->defined_in ();

  // If our version is has not bee set, we use the parent's, if any.
  while (version == 0 && scope != 0)
    {
      AST_Decl *parent = ScopeAsDecl (scope);
      version = parent->version ();
      scope = parent->defined_in ();
    }

  if (version != 0)