#pragma once /* TStack.hpp Шаблон работы со стеком (LIFO) TStack Stack; // Object должен иметь конструктор по умолчанию и оператор // const Object& operator=(const Object &) */ /* Copyright (c) 2009 Far Group All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the authors may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "noncopyable.hpp" template class TStack : private NonCopyable { private: struct OneItem { Object Item; OneItem *Next; }; struct OneItem *Top; DWORD Size; public: TStack():Top(nullptr), Size(0) {}; ~TStack() { Free(); } public: // вернуть количество элементов на стеке DWORD size() const { return Size; } // возвращает TRUE, если список пуст bool empty() const { return !Size; } // взять элемент со стека // при удаче вернется адрес Destination, иначе - nullptr Object *Pop(Object &Destination) { if (Top) { --Size; Destination=Top->Item; struct OneItem *Temp=Top->Next; delete Top; Top=Temp; return &Destination; } return nullptr; } // взять элемент со стека без изменения стека // при удаче вернется адрес Destination, иначе - nullptr Object *Peek(/*Object &Destination*/) { if (Top) { //Destination=Top->Item; //return &Destination; return &Top->Item; } return nullptr; } // положить элемент на стек // при удаче вернется адрес элемента на стеке, иначе - nullptr Object *Push(const Object &Source) { struct OneItem *Temp=new OneItem; if (Temp) { Temp->Next=Top; Temp->Item=Source; Top=Temp; ++Size; return &Top->Item; } return nullptr; } // очистить стек void Free() { while (Top) { struct OneItem *Temp=Top->Next; delete Top; Top=Temp; } Size=0; } };