release/src/router/apcupsd/include/aiter.h

   1 /*
   2  * aiter.h
   3  *
   4  * Iterator functions for aXXX classes.
   5  */
   6
   7 /*
   8  * Copyright (C) 2008 Adam Kropelin
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of version 2 of the GNU General
  12  * Public License as published by the Free Software Foundation.
  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 GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public
  20  * License along with this program; if not, write to the Free
  21  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  22  * MA 02111-1307, USA.
  23  */
  24
  25 #ifndef __AITER_H
  26 #define __AITER_H
  27
  28 template <class I, class T>
  29 class const_iterator
  30 {
  31 public:
  32    const_iterator() {}
  33    const_iterator(const const_iterator &rhs) : _iter(rhs._iter) {}
  34    const_iterator(const I &rhs)              : _iter(rhs)       {}
  35
  36    const_iterator &operator++() { ++_iter; return *this; }
  37    const_iterator operator++(int) { const_iterator tmp(_iter); ++_iter; return tmp; }
  38    const_iterator &operator--() { --_iter; return *this; }
  39    const_iterator operator--(int) { const_iterator tmp(_iter); --_iter; return tmp; }
  40
  41    const T& operator*() const { return *_iter; }
  42
  43    bool operator==(const const_iterator &rhs) const { return _iter == rhs._iter; }
  44    bool operator!=(const const_iterator &rhs) const { return !(*this == rhs); }
  45    bool operator==(const I &rhs) const { return _iter == rhs; }
  46    bool operator!=(const I &rhs) const { return !(*this == rhs); }
  47
  48    const_iterator &operator=(const const_iterator &rhs)
  49       { if (&rhs != this) _iter = rhs._iter; return *this; }
  50    const_iterator &operator=(const I &rhs)
  51       { if (&rhs != &_iter) _iter = rhs; return *this; }
  52
  53 private:
  54    I _iter;
  55 };
  56
  57 #endif // __AITER_H