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stack.h
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stack.h
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/*
* Albert 0.4 * Copyright (C)2002 Henrik Isaksson
*
* This 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef STACK_H
#define STACK_H
#ifndef NULL
#define NULL 0
#endif
class StackNode {
public:
StackNode() { m_pLink = NULL; }
void Link(StackNode *p_pLink) { m_pLink = p_pLink; }
StackNode *Unlink(void) { return m_pLink; }
// private:
StackNode *m_pLink;
};
class Stack {
public:
Stack();
~Stack();
void Push(StackNode *p_pNode)
{
p_pNode->Link(m_pTop);
m_pTop = p_pNode;
}
StackNode *Pop(void)
{
StackNode *l_pTop = m_pTop;
if(m_pTop)
m_pTop = m_pTop->Unlink();
return l_pTop;
}
void Clear(void);
private:
StackNode *m_pTop;
};
#endif /* STACK_H */