aboutsummaryrefslogtreecommitdiff
path: root/common/stack.h
blob: 127f8a5cf57f2952e5d2fb1b349e6faf4ae37466 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
/* 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 "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;
	}
	const T& top() const {
		assert(_size > 0);
		return _stack[_size - 1];
	}
	T& top() {
		assert(_size > 0);
		return _stack[_size - 1];
	}
	T pop() {
		T tmp = top();
		--_size;
		return tmp;
	}
	int size() const {
		return _size;
	}
	T& operator [](int i) {
		assert(0 <= i && i < MAX_SIZE);
		return _stack[i];
	}
	const T& operator [](int i) const {
		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>() {}
	Stack<T>(const Array<T> &stackContent) : _stack(stackContent) {}

	bool empty() const {
		return _stack.empty();
	}
	void clear() {
		_stack.clear();
	}
	void push(const T& x) {
		_stack.push_back(x);
	}
	T top() const {
		const int s = size();
		return _stack[s - 1];
	}
	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