// Created by: DAUTRY Philippe
// Copyright (c) 1997-1999 Matra Datavision
// 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.

//      	-----------------

// Version:	0.0
// Version	Date		Purpose
//		0.0	Feb 14 1997	Creation

enum
{
  TDF_AttributeValidMsk     = 1,
  TDF_AttributeBackupMsk    = 2,
  TDF_AttributeForgottenMsk = 4
};

inline int TDF_Attribute::Transaction() const
{
  return myTransaction;
}

// Validation
inline void TDF_Attribute::Validate(const bool aStatus)
{
  myFlags = (aStatus) ? (myFlags | TDF_AttributeValidMsk) : (myFlags & ~TDF_AttributeValidMsk);
}

inline bool TDF_Attribute::IsValid() const
{
  return (myFlags & TDF_AttributeValidMsk) != 0;
}

// Backup
inline void TDF_Attribute::Backup(const bool aStatus)
{
  myFlags = (aStatus) ? (myFlags | TDF_AttributeBackupMsk) : (myFlags & ~TDF_AttributeBackupMsk);
  Validate(!aStatus);
}

inline bool TDF_Attribute::IsBackuped() const
{
  return (myFlags & TDF_AttributeBackupMsk) != 0;
}

// IsNew
inline bool TDF_Attribute::IsNew() const
{
  return IsValid() && myBackup.IsNull();
}

// IsForgotten
inline bool TDF_Attribute::IsForgotten() const
{
  return (myFlags & TDF_AttributeForgottenMsk) != 0;
}

// operator <<
inline Standard_OStream& operator<<(Standard_OStream& anOS, const occ::handle<TDF_Attribute>& anAtt)
{
  return anAtt->Dump(anOS);
}