81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: Stack.h /main/2 1996/07/18 16:49:58 drk $ */
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#ifndef STACK_HEADRER
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#define STACK_HEADER
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//-----------------------------------------------------------------------
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class Element{
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friend class Stack;
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friend class SearchEngine;
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protected:
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int name;
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Element *next;
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Element( int aName, Element *v=0) { name = aName; next = v; }
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int GetName() const { return name; }
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};
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class Stack {
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private:
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Element *currentToken;
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public:
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void push( Element *tok ) { tok->next = currentToken; currentToken = tok; }
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Element *pop() {
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Element *ptr;
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if ( currentToken ) {
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ptr = currentToken;
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currentToken = ptr->next;
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return ( ptr );
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}
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else {
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return ( NULL );
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}
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}
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Element *GetTopToken() { return ( currentToken ); }
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Stack() { currentToken = NULL; }
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~Stack();
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};
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inline
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Stack::~Stack()
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{
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Element *pt = currentToken;
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while ( pt ) {
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Element *tmp = pt;
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pt = pt->next;
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delete tmp;
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}
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}
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#endif
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