0031292: Data Exchange - SIGSEGV on reading STEP file with references to invalid...

[occt.git] / src / StepData / StepData_DefaultGeneral.cxx

// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.


#include <Interface_Check.hxx>
#include <Interface_CopyTool.hxx>
#include <Interface_EntityIterator.hxx>
#include <Interface_GeneralLib.hxx>
#include <Interface_Macros.hxx>
#include <Interface_ParamType.hxx>
#include <Interface_ShareTool.hxx>
#include <Interface_UndefinedContent.hxx>
#include <Standard_Transient.hxx>
#include <Standard_Type.hxx>
#include <StepData.hxx>
#include <StepData_DefaultGeneral.hxx>
#include <StepData_Protocol.hxx>
#include <StepData_UndefinedEntity.hxx>

IMPLEMENT_STANDARD_RTTIEXT(StepData_DefaultGeneral,StepData_GeneralModule)

//  DefaultGeneral de StepData  reconnait  UN SEUL TYPE : UndefinedEntity
StepData_DefaultGeneral::StepData_DefaultGeneral ()
{
  Interface_GeneralLib::SetGlobal (this, StepData::Protocol());
}

    void  StepData_DefaultGeneral::FillSharedCase
  (const Standard_Integer casenum, const Handle(Standard_Transient)& ent,
   Interface_EntityIterator& iter) const 
{
  if (casenum != 1) return;
  DeclareAndCast(StepData_UndefinedEntity,undf,ent);
  Handle(Interface_UndefinedContent) cont = undf->UndefinedContent();
  Standard_Integer nb = cont->NbParams();
  for (Standard_Integer i = 1; i <= nb; i ++) {
    Interface_ParamType ptype = cont->ParamType(i);
    if (ptype == Interface_ParamSub) {
      DeclareAndCast(StepData_UndefinedEntity,subent,cont->ParamEntity(i));
      FillSharedCase(casenum,cont->ParamEntity(i),iter);
    } else if (ptype == Interface_ParamIdent) {
      iter.GetOneItem(cont->ParamEntity(i));
    }
  }
}


void  StepData_DefaultGeneral::CheckCase(const Standard_Integer,
                                         const Handle(Standard_Transient)&,
                                         const Interface_ShareTool&,
                                         Handle(Interface_Check)&) const 
{
}  //  pas de Check sur une UndefinedEntity


    Standard_Boolean  StepData_DefaultGeneral::NewVoid
  (const Standard_Integer CN, Handle(Standard_Transient)& ent) const 
{
  if (CN != 1) return Standard_False;
  ent = new StepData_UndefinedEntity;
  return Standard_True;
}

    void  StepData_DefaultGeneral::CopyCase
  (const Standard_Integer casenum, const Handle(Standard_Transient)& entfrom,
   const Handle(Standard_Transient)& entto, Interface_CopyTool& TC) const 
{
  if (casenum != 1) return;
  DeclareAndCast(StepData_UndefinedEntity,undfrom,entfrom);
  DeclareAndCast(StepData_UndefinedEntity,undto,entto);
  undto->GetFromAnother(undfrom,TC);  //  On pourrait rapatrier cela
}