ACE/apps/gperf/src/Bool_Array.h

   1 // -*- C++ -*-
   2
   3 /**
   4  * Copyright (C) 1989 Free Software Foundation, Inc.
   5  * written by Douglas C. Schmidt (d.schmidt@vanderbilt.edu)
   6  *
   7  * This file is part of GNU GPERF.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #ifndef BOOL_ARRAY_H
  25 #define BOOL_ARRAY_H
  26
  27 #include "ace/config-all.h"
  28
  29 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  30 # pragma once
  31 #endif /* ACE_LACKS_PRAGMA_ONCE */
  32
  33 #include "Options.h"
  34
  35 /**
  36  * Efficient lookup table abstraction implemented as a "Generation
  37  * Number" Array.
  38  *
  39  * Uses a "Generation Numbering" implementation to minimize
  40  * initialization time.
  41  */
  42 class Bool_Array
  43 {
  44 public:
  45   /// Constructor
  46   Bool_Array ();
  47
  48   /// Initialize the array (requires O(n) time).
  49   int open (u_long);
  50
  51   /// Destructor.
  52   ~Bool_Array ();
  53
  54   /// Locate the @a value in the array (requires O(1) time).
  55   int find (u_long value);
  56
  57   /// Reinitializes the array (requires O(1) time).
  58   void reset ();
  59
  60 private:
  61   /// Initialization of the index space.
  62   unsigned long *storage_array_;
  63
  64   /// Keep track of the current Generation.
  65   unsigned long generation_number_;
  66
  67   /// Keep track of array size.
  68   unsigned long size_;
  69 };
  70
  71 #endif /* BOOL_ARRAY_H */