mstack.h

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/*
 * The ManaPlus Client
 * Copyright (C) 2015-2019 The ManaPlus Developers
 * Copyright (C) 2019-2021 Andrei Karas
 *
 * This file is part of The ManaPlus Client.
 *
 * This program 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 of the License, or
 * any later version.
 *
 * This program 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 program. If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef RESOURCES_MSTACK_H
#define RESOURCES_MSTACK_H
 
#include "logger.h"
 
#include "localconsts.h"
 
template<typename T>
struct MStack final
{
 constexpr2 explicit MStack(const size_t maxSize) :
 mStack(new T[maxSize]),
 mMaxSize(maxSize),
 mPointer(mStack - 1),
 mStartPointer(mStack - 1),
 mEndPointer(mStack + maxSize - 1)
 {
 }
 
 ~MStack()
 {
 delete [] mStack;
 }
 
 A_DELETE_COPY(MStack)
 
 T &push()
 {
 if (mPointer == mEndPointer)
 {
 logger->log("error: max stack size reached");
 return *mPointer;
 }
 return *(++mPointer);
 }
 
 T &getPop()
 {
 return *(mPointer--);
 }
 
 const T &getPopConst()
 {
 return *(mPointer--);
 }
 
 void pop()
 {
 mPointer --;
 }
 
 T &top() const
 {
 return *mPointer;
 }
 
 const T &topConst() const
 {
 return *mPointer;
 }
 
 void clear()
 {
 mPointer = mStack - 1;
 }
 
 bool empty() const
 {
 return mPointer == mStartPointer;
 }
 
 T *mStack;
 
 size_t mMaxSize;
 T *mPointer;
 const T *const mStartPointer;
 const T *const mEndPointer;
};
 
#endif // RESOURCES_MSTACK_H