mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-28 12:46:56 +00:00
117 lines
2.2 KiB
C++
117 lines
2.2 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2002-2006 The ScummVM project
|
|
*
|
|
* 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 (at your option) 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, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*
|
|
* $URL$
|
|
* $Id$
|
|
*/
|
|
|
|
#ifndef COMMON_STACK_H
|
|
#define COMMON_STACK_H
|
|
|
|
#include "common/scummsys.h"
|
|
#include <assert.h>
|
|
#include "common/array.h"
|
|
|
|
namespace Common {
|
|
|
|
/**
|
|
* Extremly simple fixed size stack class.
|
|
*/
|
|
template <class T, int MAX_SIZE = 10>
|
|
class FixedStack {
|
|
protected:
|
|
T _stack[MAX_SIZE];
|
|
int _size;
|
|
public:
|
|
FixedStack<T, MAX_SIZE>() : _size(0) {}
|
|
|
|
bool empty() const {
|
|
return _size <= 0;
|
|
}
|
|
void clear() {
|
|
_size = 0;
|
|
}
|
|
void push(const T& x) {
|
|
assert(_size < MAX_SIZE);
|
|
_stack[_size++] = x;
|
|
}
|
|
T top() const {
|
|
if (_size > 0)
|
|
return _stack[_size - 1];
|
|
else
|
|
return 0;
|
|
}
|
|
T pop() {
|
|
T tmp;
|
|
assert(_size > 0);
|
|
tmp = _stack[_size - 1];
|
|
_stack[--_size] = 0;
|
|
return tmp;
|
|
}
|
|
int size() const {
|
|
return _size;
|
|
}
|
|
T operator [](int i) {
|
|
assert(0 <= i && i < MAX_SIZE);
|
|
return _stack[i];
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* Variable size stack class, implemented using our Array class.
|
|
*/
|
|
template <class T>
|
|
class Stack {
|
|
protected:
|
|
Array<T> _stack;
|
|
public:
|
|
Stack<T>() {}
|
|
|
|
bool empty() const {
|
|
return _stack.isEmpty();
|
|
}
|
|
void clear() {
|
|
_stack.clear();
|
|
}
|
|
void push(const T& x) {
|
|
_stack.push_back(x);
|
|
}
|
|
T top() const {
|
|
const int s = size();
|
|
if (s > 0)
|
|
return _stack[s - 1];
|
|
else
|
|
return 0;
|
|
}
|
|
T pop() {
|
|
T tmp = top();
|
|
_stack.remove_at(size() - 1);
|
|
return tmp;
|
|
}
|
|
int size() const {
|
|
return _stack.size();
|
|
}
|
|
T operator [](int i) {
|
|
return _stack[i];
|
|
}
|
|
};
|
|
|
|
} // End of namespace Common
|
|
|
|
#endif
|