/*

COPYRIGHT

Copyright 1992, 1993, 1994 Sun Microsystems, Inc.  Printed in the United
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This product is protected by copyright and distributed under the following
license restricting its use.

The Interface Definition Language Compiler Front End (CFE) is made
available for your use provided that you include this license and copyright
notice on all media and documentation and the software program in which
this product is incorporated in whole or part. You may copy and extend
functionality (but may not remove functionality) of the Interface
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*/

// AST_Modules denote IDL module declarations
// AST_Modules are subclasses of AST_Decl (they are not a type!) and
// of UTL_Scope.

#include "ast_module.h"
#include "ast_template_module_inst.h"
#include "ast_predefined_type.h"
#include "ast_valuebox.h"
#include "ast_valuetype.h"
#include "ast_valuetype_fwd.h"
#include "ast_eventtype.h"
#include "ast_eventtype_fwd.h"
#include "ast_component.h"
#include "ast_component_fwd.h"
#include "ast_porttype.h"
#include "ast_connector.h"
#include "ast_home.h"
#include "ast_constant.h"
#include "ast_exception.h"
#include "ast_union.h"
#include "ast_union_fwd.h"
#include "ast_structure_fwd.h"
#include "ast_enum.h"
#include "ast_enum_val.h"
#include "ast_typedef.h"
#include "ast_native.h"
#include "ast_generator.h"
#include "ast_visitor.h"
#include "ast_extern.h"

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

#include "global_extern.h"
#include "nr_extern.h"

AST_Decl::NodeType const
  AST_Module::NT = AST_Decl::NT_module;

AST_Module::AST_Module (UTL_ScopedName *n, AST_Module *previous)
  : AST_Decl (AST_Decl::NT_module, n),
    UTL_Scope (AST_Decl::NT_module),
    pd_has_nested_valuetype_ (false),
    previous_opening_ (previous),
    last_in_same_parent_scope_ (this),
    from_inst_ (nullptr),
    from_ref_ (nullptr)
{
  // NOTE previous passed into this constructor should be
  // the FIRST module that is a previous opening of this same
  // module in the scope in which it is stored. Later on if
  // the module is validated and added to it's scope, the
  // previous_opening_ will be adjusted to be the immediatly
  // previous opening of this module. See fe_add_module ()
  // below.
}

AST_Module::~AST_Module ()
{
}

void
AST_Module::destroy ()
{
  this->UTL_Scope::destroy ();
  this->AST_Decl::destroy ();
}

// Dump this AST_Module node to the ostream o.
void
AST_Module::dump (ACE_OSTREAM_TYPE &o)
{
  this->dump_i (o, "module ");
  this->local_name ()->dump (o);
  this->dump_i (o, " {\n");
  UTL_Scope::dump (o);
  idl_global->indent ()->skip_to (o);
  this->dump_i (o, "}");
}

// We actually want to match the LAST module found in
// the scope being searched not the FIRST one in the
// list.
AST_Decl *
AST_Module::adjust_found (
  bool /*ignore_fwd*/,
  bool /*full_def_only*/)
{
  return this->last_in_same_parent_scope_;
}

// Involved in OBV_ namespace generation.
void
AST_Module::set_has_nested_valuetype ()
{
  UTL_Scope *parent = this->defined_in ();
  if (parent && !this->pd_has_nested_valuetype_)
    {
      AST_Module *pm = dynamic_cast<AST_Module*> (parent);
      if (pm)
        {
          pm->set_has_nested_valuetype ();
        }
    }

  this->pd_has_nested_valuetype_ = true;
}

bool
AST_Module::has_nested_valuetype ()
{
  return this->pd_has_nested_valuetype_;
}

int
AST_Module::be_add_interface (AST_Interface *i,
                              AST_Interface *ix)
{
  // Add it to scope.
  this->add_to_scope (i, ix);

  // Add it to set of locally referenced symbols.
  this->add_to_referenced (i,
                           false,
                           i->local_name (),
                           ix);
  return 0;
}

int
AST_Module::be_add_valuetype (AST_ValueType *v)
{
  // Add it to scope.
  this->add_to_scope (v);

  // Add it to set of locally referenced symbols.
  this->add_to_referenced (v,
                           false,
                           v->local_name ());
  return 0;
}

// Has this node been referenced here before?
bool
AST_Module::referenced (AST_Decl *e,
                        Identifier *id)
{
  bool refd = this->UTL_Scope::referenced (e, id);
  if (refd)
    {
      return true;
    }

  AST_Decl *d =
    this->look_in_prev_mods_local (e->local_name (), true);
  if (!d)
    {
      return false;
    }

  AST_Type *t = dynamic_cast<AST_Type*> (d);
  return (!t || t->is_defined ());
}

AST_Module *
AST_Module::previous_opening ()
{
  return this->previous_opening_;
}

AST_Decl *
AST_Module::look_in_prev_mods_local (Identifier *e,
                                     bool ignore_fwd)
{
  for (AST_Module *po = this->previous_opening_;
       po;
       po = po->previous_opening_)
    {
      for (UTL_ScopeActiveIterator iter (po, UTL_Scope::IK_decls);
           !iter.is_done ();
           iter.next ())
        {
          AST_Decl *d = iter.item ();
          if ((!ignore_fwd || !d->is_fwd ())
              && !!(d = d->adjust_found (ignore_fwd, false))
              && e->case_compare (d->local_name ()))
            {
              return d;
            }
        }
    }

  return nullptr;
}

AST_Decl *
AST_Module::look_in_prev_mods (UTL_ScopedName *e,
                               bool full_def_only,
                               AST_Decl *&final_parent_decl)
{
  for (AST_Module *po = this->previous_opening_;
       po;
       po = po->previous_opening_)
    {
      for (UTL_ScopeActiveIterator iter (po, UTL_Scope::IK_decls);
           !iter.is_done ();
           iter.next ())
        {
          AST_Decl *const d =
            iter.item ()->adjust_found (full_def_only, full_def_only);

          if (d && e->head ()->case_compare (d->local_name ()))
            {
              UTL_ScopedName *sn =
                static_cast<UTL_ScopedName *> (e->tail ());
              if (!sn)
                {
                  final_parent_decl= static_cast<AST_Decl *> (po);
                  return d; // Nothing left in path, found wanted name
                }

              UTL_Scope *s = DeclAsScope (d);
              if (s)
                {
                  // Recurse down what is left of the path
                  return s->lookup_by_name_r (sn, full_def_only, final_parent_decl);
                }

              // Find next match, this one didn't work out.
            }
        }
    }

  return nullptr; // Not found.
}

int
AST_Module::ast_accept (ast_visitor *visitor)
{
  return visitor->visit_module (this);
}

AST_Template_Module_Inst *
AST_Module::from_inst () const
{
  return this->from_inst_;
}

void
AST_Module::from_inst (AST_Template_Module_Inst *node)
{
  this->from_inst_ = node;
}

AST_Template_Module_Ref *
AST_Module::from_ref () const
{
  return this->from_ref_;
}

void
AST_Module::from_ref (AST_Template_Module_Ref *node)
{
  this->from_ref_ = node;
}

AST_Decl *
AST_Module::special_lookup (UTL_ScopedName *e,
                            bool full_def_only,
                            AST_Decl *&final_parent_decl)
{
  return this->look_in_prev_mods (e, full_def_only, final_parent_decl);
}

//================================================

AST_PredefinedType *
AST_Module::fe_add_predefined_type (AST_PredefinedType *t)
{
  return dynamic_cast<AST_PredefinedType*> (this->fe_add_decl (t));
}

AST_Module *
AST_Module::fe_add_module (AST_Module *t)
{
  // If our prefix is empty, we check to see if an ancestor has one.
  if (!ACE_OS::strcmp (t->prefix (), ""))
    {
      UTL_Scope *scope = t->defined_in ();
      while (scope)
        {
          AST_Decl *parent = ScopeAsDecl (scope);
          const char *prefix_holder = parent->prefix ();

          if (!prefix_holder)
            {
              break; // We have reached global scope.
            }

          t->prefix (const_cast<char *> (prefix_holder));

          if (ACE_OS::strcmp (t->prefix (), ""))
            {
              break;
            }

          scope = parent->defined_in ();
        }
    }

  // Already defined and cannot be redefined? Or already used?
  AST_Module *m = nullptr;
  AST_Decl *d = this->lookup_for_add (t);

  if (d)
    {
      if (!FE_Utils::can_be_redefined (d, t))
        {
          idl_global->err ()->error3 (UTL_Error::EIDL_REDEF,
                                      t,
                                      this,
                                      d);
          return nullptr;
        }

      // has_ancestor() returns TRUE if both nodes are the same.
      m = dynamic_cast<AST_Module*> (d);
      if (t != m && t->has_ancestor (d))
        {
          idl_global->err ()->redefinition_in_scope (t, d);
          return nullptr;
        }

      const char *prev_prefix = d->prefix ();
      const char *this_prefix = t->prefix ();

      if (!ACE_OS::strcmp (this_prefix, ""))
        {
          t->prefix (const_cast<char *> (prev_prefix));
        }
      else if (!ACE_OS::strcmp (prev_prefix, ""))
        {
          d->prefix (const_cast<char *> (this_prefix));
        }
    }

  // Now we are actually adding this new module to the active
  // scopes, ensure that the previous openings are all updated
  // so that this new module is recorded as the current
  // "last module" definition in our scope.
  AST_Module *first_opening = t->previous_opening_;
  if (first_opening)
    {
      // When we created the module we simply stored the first
      // previous module we found (if any), we actually want
      // to refer to that module's LAST opening in that same scope
      // except this module itself (which isn't yet recorded anyway).
      t->previous_opening_ = first_opening->last_in_same_parent_scope_;
      if (first_opening->defined_in () == this)
        {
          // Since the previous openings are in our own scope,
          // make sure that these all point to this new module.
          for (AST_Module *pm = t->previous_opening_;
               pm;
               pm = pm->previous_opening_)
            {
              pm->last_in_same_parent_scope_ = t;
              if (pm == first_opening)
                {
                  // Even if there are still more previous modules,
                  // the ones before this one are in a different
                  // scope and do not need to be updated.
                  break;
                }
            }
        }
    }

  // If this node is not a reopened module, add it to scope and referenced.
  if (!m || t != m)
    {
      // Add it to scope.
      this->add_to_scope (t);

      // Add it to set of locally referenced symbols.
      this->add_to_referenced (t,
                               false,
                               t->local_name ());
    }

  return t;
}

AST_Template_Module_Inst *
AST_Module::fe_add_template_module_inst (AST_Template_Module_Inst *t)
{
  return dynamic_cast<AST_Template_Module_Inst*> (this->fe_add_ref_decl (t));
}

AST_Interface *
AST_Module::fe_add_interface (AST_Interface *t)
{
  return this->fe_add_full_intf_decl<AST_Interface> (t);
}

AST_ValueBox *
AST_Module::fe_add_valuebox (AST_ValueBox *t)
{
  return dynamic_cast<AST_ValueBox*> (this->fe_add_decl (t));
}

AST_ValueType *
AST_Module::fe_add_valuetype (AST_ValueType *t)
{
  return this->fe_add_full_intf_decl<AST_ValueType> (t);
}

AST_EventType *
AST_Module::fe_add_eventtype (AST_EventType *t)
{
  return this->fe_add_full_intf_decl<AST_EventType> (t);
}

AST_Component *
AST_Module::fe_add_component (AST_Component *t)
{
  return this->fe_add_full_intf_decl<AST_Component> (t);
}

AST_Connector *
AST_Module::fe_add_connector (AST_Connector *t)
{
  return dynamic_cast<AST_Connector*> (this->fe_add_decl (t));
}

AST_Home *
AST_Module::fe_add_home (AST_Home *t)
{
  return dynamic_cast<AST_Home*> (this->fe_add_decl (t));
}

AST_InterfaceFwd *
AST_Module::fe_add_interface_fwd (AST_InterfaceFwd *t)
{
  return this->fe_add_fwd_intf_decl<AST_Interface> (t);
}

AST_ValueTypeFwd *
AST_Module::fe_add_valuetype_fwd (AST_ValueTypeFwd *t)
{
  return this->fe_add_fwd_intf_decl<AST_ValueType> (t);
}

AST_EventTypeFwd *
AST_Module::fe_add_eventtype_fwd (AST_EventTypeFwd *t)
{
  return this->fe_add_fwd_intf_decl<AST_EventType> (t);
}

AST_ComponentFwd *
AST_Module::fe_add_component_fwd (AST_ComponentFwd *t)
{
  return this->fe_add_fwd_intf_decl<AST_Component> (t);
}

AST_Constant *
AST_Module::fe_add_constant (AST_Constant *t)
{
  return dynamic_cast<AST_Constant*> (this->fe_add_decl (t));
}

AST_Exception *
AST_Module::fe_add_exception (AST_Exception *t)
{
  return dynamic_cast<AST_Exception*> (this->fe_add_decl (t));
}

AST_Union *
AST_Module::fe_add_union (AST_Union *t)
{
  return dynamic_cast<AST_Union*> (this->fe_add_full_struct_type (t));
}

AST_UnionFwd *
AST_Module::fe_add_union_fwd (AST_UnionFwd *t)
{
  return dynamic_cast<AST_UnionFwd*> (this->fe_add_fwd_struct_type (t));
}

AST_Structure *
AST_Module::fe_add_structure (AST_Structure *t)
{
  return this->fe_add_full_struct_type (t);
}

AST_StructureFwd *
AST_Module::fe_add_structure_fwd (AST_StructureFwd *t)
{
  return this->fe_add_fwd_struct_type (t);
}

AST_Enum *
AST_Module::fe_add_enum (AST_Enum *t)
{
  return dynamic_cast<AST_Enum*> (this->fe_add_decl (t));
}

// Add an AST_EnumVal node (an enumerator) to this scope.
// This is done to conform to the C++ scoping rules which declare
// enumerators in the enclosing scope (in addition to declaring them
// in the enum itself).
AST_EnumVal *
AST_Module::fe_add_enum_val (AST_EnumVal *t)
{
  return dynamic_cast<AST_EnumVal*> (this->fe_add_decl (t));
}

AST_Typedef *
AST_Module::fe_add_typedef (AST_Typedef *t)
{
  return dynamic_cast<AST_Typedef*> (this->fe_add_ref_decl (t));
}

AST_Native *
AST_Module::fe_add_native (AST_Native *t)
{
  return dynamic_cast<AST_Native*> (this->fe_add_decl (t));
}

AST_PortType *
AST_Module::fe_add_porttype (AST_PortType *t)
{
  return dynamic_cast<AST_PortType*> (this->fe_add_decl (t));
}

void
AST_Module::reset_last_in_same_parent_scope ()
{
  this->last_in_same_parent_scope_ = this;
}

AST_Annotation_Decl *
AST_Module::fe_add_annotation_decl (
  AST_Annotation_Decl *annotation_decl)
{
  return dynamic_cast<AST_Annotation_Decl*> (fe_add_decl (annotation_decl));
}