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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988 Free Software Foundation
- written by Doug Lea (dl@rocky.oswego.edu)
-
- This file is part of the GNU C++ Library. This library is free
- software; you can redistribute it and/or modify it under the terms of
- the GNU Library General Public License as published by the Free
- Software Foundation; either version 2 of the License, 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 Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
- #ifndef _<T>VQueue_h
- #ifdef __GNUG__
- #pragma interface
- #endif
- #define _<T>VQueue_h 1
-
- #include "<T>.Queue.h"
-
- class <T>VQueue : public <T>Queue
- {
- protected:
- int size;
- int cnt;
- int inp;
- int outp;
- <T>* s;
-
- public:
-
- <T>VQueue(int sz = DEFAULT_INITIAL_CAPACITY);
- <T>VQueue(<T>VQueue&);
- ~<T>VQueue();
-
- void operator = (<T>VQueue&);
-
- void enq(<T&> item);
- <T> deq();
- <T>& front();
- void del_front();
-
- int length();
- int empty();
- int full();
-
- int capacity();
- void resize(int sz);
- void clear();
-
- int OK();
- };
-
-
- inline <T>VQueue::<T>VQueue(int sz)
- {
- s = new <T> [size = sz];
- cnt = inp = outp = 0;
- }
-
- inline <T>VQueue::~<T>VQueue()
- {
- delete [] s;
- }
-
- inline void <T>VQueue::clear()
- {
- inp = outp = 0;
- cnt = 0;
- }
-
- inline int <T>VQueue::empty()
- {
- return cnt <= 0;
- }
-
- inline int <T>VQueue::capacity()
- {
- return size;
- }
-
- inline int <T>VQueue::full()
- {
- return cnt >= size;
- }
-
- inline int <T>VQueue::length()
- {
- return cnt;
- }
-
- inline void <T>VQueue::enq(<T&> item)
- {
- if (cnt >= size) error("enq to full Queue.");
- ++cnt;
- s[inp] = item;
- if (++inp == size) inp = 0;
- }
-
- inline <T> <T>VQueue::deq()
- {
- if (cnt <= 0) error("deq from empty Queue.");
- --cnt;
- int i = outp;
- if (++outp == size) outp = 0;
- return s[i];
- }
-
-
- inline void <T>VQueue::del_front()
- {
- if (cnt <= 0) error("delete from empty Queue.");
- --cnt;
- if (++outp == size) outp = 0;
- }
-
- inline <T>& <T>VQueue::front()
- {
- if (empty()) error("top from empty Queue.");
- return s[outp];
- }
-
- #endif
-