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- // Queue implementation -*- C++ -*-
-
- // Copyright (C) 2001 Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
- // any later version.
-
- // This library 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 library; see the file COPYING. If not, write to the Free
- // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- // USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- /*
- *
- * 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) 1996,1997
- * Silicon Graphics Computer Systems, Inc.
- *
- * 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. Silicon Graphics makes no
- * representations about the suitability of this software for any
- * purpose. It is provided "as is" without express or implied warranty.
- */
-
- /** @file stl_queue.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
- #ifndef __GLIBCPP_INTERNAL_QUEUE_H
- #define __GLIBCPP_INTERNAL_QUEUE_H
-
- #include <bits/concept_check.h>
-
- namespace std
- {
-
- // Forward declarations of operators < and ==, needed for friend declaration.
-
- template <class _Tp,
- class _Sequence = deque<_Tp> >
- class queue;
-
- template <class _Tp, class _Seq>
- inline bool operator==(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
-
- template <class _Tp, class _Seq>
- inline bool operator<(const queue<_Tp, _Seq>&, const queue<_Tp, _Seq>&);
-
-
- template <class _Tp, class _Sequence>
- class queue
- {
- // concept requirements
- __glibcpp_class_requires(_Tp, _SGIAssignableConcept)
- __glibcpp_class_requires(_Sequence, _FrontInsertionSequenceConcept)
- __glibcpp_class_requires(_Sequence, _BackInsertionSequenceConcept)
- typedef typename _Sequence::value_type _Sequence_value_type;
- __glibcpp_class_requires2(_Tp, _Sequence_value_type, _SameTypeConcept);
-
- template <class _Tp1, class _Seq1>
- friend bool operator== (const queue<_Tp1, _Seq1>&,
- const queue<_Tp1, _Seq1>&);
- template <class _Tp1, class _Seq1>
- friend bool operator< (const queue<_Tp1, _Seq1>&,
- const queue<_Tp1, _Seq1>&);
- public:
- typedef typename _Sequence::value_type value_type;
- typedef typename _Sequence::size_type size_type;
- typedef _Sequence container_type;
-
- typedef typename _Sequence::reference reference;
- typedef typename _Sequence::const_reference const_reference;
- protected:
- _Sequence c;
- public:
- explicit queue(const _Sequence& __c = _Sequence()) : 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 _Tp, class _Sequence>
- bool
- operator==(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return __x.c == __y.c;
- }
-
- template <class _Tp, class _Sequence>
- bool
- operator<(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return __x.c < __y.c;
- }
-
- template <class _Tp, class _Sequence>
- bool
- operator!=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return !(__x == __y);
- }
-
- template <class _Tp, class _Sequence>
- bool
- operator>(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return __y < __x;
- }
-
- template <class _Tp, class _Sequence>
- bool
- operator<=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return !(__y < __x);
- }
-
- template <class _Tp, class _Sequence>
- bool
- operator>=(const queue<_Tp, _Sequence>& __x, const queue<_Tp, _Sequence>& __y)
- {
- return !(__x < __y);
- }
-
- template <class _Tp,
- class _Sequence = vector<_Tp>,
- class _Compare = less<typename _Sequence::value_type> >
- class priority_queue
- {
- // concept requirements
- __glibcpp_class_requires(_Tp, _SGIAssignableConcept)
- __glibcpp_class_requires(_Sequence, _SequenceConcept)
- __glibcpp_class_requires(_Sequence, _RandomAccessContainerConcept)
- typedef typename _Sequence::value_type _Sequence_value_type;
- __glibcpp_class_requires2(_Tp, _Sequence_value_type, _SameTypeConcept);
- __glibcpp_class_requires4(_Compare, bool, _Tp, _Tp, _BinaryFunctionConcept);
-
- public:
- typedef typename _Sequence::value_type value_type;
- typedef typename _Sequence::size_type size_type;
- typedef _Sequence container_type;
-
- typedef typename _Sequence::reference reference;
- typedef typename _Sequence::const_reference const_reference;
- protected:
- _Sequence c;
- _Compare comp;
- public:
- explicit priority_queue(const _Compare& __x = _Compare(),
- const _Sequence& __s = _Sequence())
- : c(__s), comp(__x)
- { make_heap(c.begin(), c.end(), comp); }
-
- template <class _InputIterator>
- priority_queue(_InputIterator __first, _InputIterator __last,
- const _Compare& __x = _Compare(),
- const _Sequence& __s = _Sequence())
- : c(__s), comp(__x)
- {
- c.insert(c.end(), __first, __last);
- make_heap(c.begin(), c.end(), comp);
- }
-
- bool empty() const { return c.empty(); }
- size_type size() const { return c.size(); }
- const_reference top() const { return c.front(); }
-
- void
- push(const value_type& __x)
- {
- try
- {
- c.push_back(__x);
- push_heap(c.begin(), c.end(), comp);
- }
- catch(...)
- {
- c.clear();
- __throw_exception_again;
- }
- }
-
- void
- pop()
- {
- try
- {
- pop_heap(c.begin(), c.end(), comp);
- c.pop_back();
- }
- catch(...)
- {
- c.clear();
- __throw_exception_again;
- }
- }
- };
-
- // no equality is provided
-
- } // namespace std
-
- #endif /* __GLIBCPP_INTERNAL_QUEUE_H */
-
- // Local Variables:
- // mode:C++
- // End:
-