queue

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// -*- C++ -*-
/***************************************************************************
 *
 * queue - declarations for the Standard Library queue classes
 *
 ***************************************************************************
 *
 * Copyright (c) 1994
 * Hewlett-Packard Company
 *
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.  Hewlett-Packard Company makes no
 * representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-2001 Rogue Wave Software, Inc.  All Rights Reserved.
 *
 * This computer software is owned by Rogue Wave Software, Inc. and is
 * protected by U.S. copyright laws and other laws and by international
 * treaties.  This computer software is furnished by Rogue Wave Software,
 * Inc. pursuant to a written license agreement and may be used, copied,
 * transmitted, and stored only in accordance with the terms of such
 * license and with the inclusion of the above copyright notice.  This
 * computer software or any other copies thereof may not be provided or
 * otherwise made available to any other person.
 *
 * U.S. Government Restricted Rights.  This computer software is provided
 * with Restricted Rights.  Use, duplication, or disclosure by the
 * Government is subject to restrictions as set forth in subparagraph (c)
 * (1) (ii) of The Rights in Technical Data and Computer Software clause
 * at DFARS 252.227-7013 or subparagraphs (c) (1) and (2) of the
 * Commercial Computer Software--Restricted Rights at 48 CFR 52.227-19,
 * as applicable.  Manufacturer is Rogue Wave Software, Inc., 5500
 * Flatiron Parkway, Boulder, Colorado 80301 USA.
 *
 **************************************************************************/

#ifndef _RWSTD_QUEUE_INCLUDED
#define _RWSTD_QUEUE_INCLUDED

#include <algorithm>
#include <deque>
#include <functional>
#include <vector>

#include <rw/_defs.h>


_RWSTD_NAMESPACE_BEGIN (std)

template <class _TypeT, class _Container _RWSTD_COMPLEX_DEFAULT(deque<_TypeT>) > 
  class queue;

  template <class _TypeT, class _Container>
  inline bool operator== (const queue<_TypeT,_Container>& __x, 
                          const queue<_TypeT,_Container>& __y);

  template <class _TypeT, class _Container>
  inline bool operator< (const queue<_TypeT,_Container>& __x, 
                         const queue<_TypeT,_Container>& __y);

  template <class _TypeT, class _Container>
  class queue
  {
      friend bool _RWSTD_SPECIALIZED_FRIEND (operator==)
          (const queue& __x, const queue& __y);

      friend bool _RWSTD_SPECIALIZED_FRIEND (operator<)
          (const queue& __x, const queue& __y);


  public:

    typedef _TYPENAME _Container::value_type         value_type;
    typedef _TYPENAME _Container::size_type          size_type;
    typedef _TYPENAME _Container::reference          reference;
    typedef _TYPENAME _Container::const_reference    const_reference;
    typedef _Container                               container_type;

  protected:

    _Container c;

  public:

    _EXPLICIT
    queue (const container_type &__c = container_type ())
        : c (__c) { }

    bool                  empty () const              { return c.empty(); }
    size_type             size  () const              { return c.size();  }
    reference             front ()                    { return c.front(); }
    const_reference       front () const              { return c.front(); }
    reference             back  ()                    { return c.back();  }
    const_reference       back  () const              { return c.back();  }
    void                  push  (const value_type& __x) { c.push_back(__x);   }
    void                  pop   ()                    { c.pop_front();    }

  };

  template <class _TypeT, class _Container>
  inline bool operator== (const queue<_TypeT,_Container>& __x, 
                          const queue<_TypeT,_Container>& __y)
  {
    return __x.c == __y.c;
  }

  template <class _TypeT, class _Container>
  inline bool operator< (const queue<_TypeT,_Container>& __x, 
                         const queue<_TypeT,_Container>& __y)
  {
    return __x.c < __y.c;
  }

  template <class _TypeT, class _Container>
  inline bool operator!= (const queue<_TypeT,_Container>& __x, 
                          const queue<_TypeT,_Container>& __y)
  {
    return !(__x == __y);
  }

  template <class _TypeT, class _Container>
  inline bool operator> (const queue<_TypeT,_Container>& __x, 
                         const queue<_TypeT,_Container>& __y)
  {
    return __y < __x;
  }

  template <class _TypeT, class _Container>
  inline bool operator>= (const queue<_TypeT,_Container>& __x, 
                          const queue<_TypeT,_Container>& __y)
  {
    return !(__x < __y);
  }

  template <class _TypeT, class _Container>
  inline bool operator<= (const queue<_TypeT,_Container>& __x, 
                          const queue<_TypeT,_Container>& __y)
  {
    return !(__y <  __x);
  }

#ifndef _RWSTD_NO_COMPLEX_DEFAULT_TEMPLATES
  template<class _TypeT, class _Container = vector<_TypeT>,
  class _Compare = less<_TYPENAME _Container::value_type> >
#else
  template <class _TypeT,class _Container, class _Compare> 
#endif
  class priority_queue
  {
  public:

    typedef _TYPENAME _Container::value_type         value_type;
    typedef _TYPENAME _Container::size_type          size_type;
    typedef _TYPENAME _Container::const_reference    const_reference;
    typedef _Container                               container_type;

  protected:

    _Container c;
    _Compare   comp;

  public:

    _EXPLICIT
    priority_queue (const _Compare       & __cmp = _Compare (),
                    const container_type &__c = container_type ())
        : c (__c), comp (__cmp) 
    { ; }

#ifndef _RWSTD_NO_MEMBER_TEMPLATES
    template <class _InputIter>
    priority_queue (_InputIter __first, _InputIter __last, 
                    const _Compare& __x = _Compare(),
                    const _Container& __y = _Container())
      : c(__y), comp(__x) 
    {
      c.insert(c.end(),__first,__last);
      make_heap(c.begin(), c.end(), comp);
    }
#else
    priority_queue (_TYPENAME _Container::const_iterator __first,
                    _TYPENAME _Container::const_iterator __last,
                    const _Compare& __cmp = _Compare ())

      : c(__first, __last, _Container::allocator_type()), comp(__x)
    {
      make_heap(c.begin(), c.end(), comp);
    }
#endif
    
    bool                  empty () const { return c.empty(); }
    size_type             size  () const { return c.size();  }
    const_reference       top   () const { return c.front(); }

    void push (const_reference __x)
    { 
      c.push_back(__x); push_heap(c.begin(), c.end(), comp);
    }
    void pop ()
    {
      pop_heap(c.begin(), c.end(), comp); c.pop_back(); 
    }
  };


_RWSTD_NAMESPACE_END   // std


#endif   // _RWSTD_QUEUE_INCLUDED