// -*- C++ -*-

/**
 * $Id: Bool_Array.h 93359 2011-02-11 11:33:12Z mcorino $
 *
 * Copyright (C) 1989 Free Software Foundation, Inc.
 * written by Douglas C. Schmidt (schmidt@cs.wustl.edu)
 *
 * This file is part of GNU GPERF.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef BOOL_ARRAY_H
#define BOOL_ARRAY_H

#include "ace/config-all.h"

#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

#include "Options.h"

/**
 * Efficient lookup table abstraction implemented as a "Generation
 * Number" Array.
 *
 * Uses a "Generation Numbering" implementation to minimize
 * initialization time.
 */
class Bool_Array
{
public:
  /// Constructor
  Bool_Array (void);

  /// Initialize the array (requires O(n) time).
  int open (u_long);

  /// Destructor.
  ~Bool_Array (void);

  /// Locate the @a value in the array (requires O(1) time).
  int find (u_long value);

  /// Reinitializes the array (requires O(1) time).
  void reset (void);

private:
  /// Initialization of the index space.
  unsigned long *storage_array_;

  /// Keep track of the current Generation.
  unsigned long generation_number_;

  /// Keep track of array size.
  unsigned long size_;
};

#endif /* BOOL_ARRAY_H */
