152 lines
3.8 KiB
C++
152 lines
3.8 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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/*
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* $XConsortium: CC_Listbase.h /main/4 1996/08/21 15:48:41 drk $
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*
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* Copyright (c) 1993 HAL Computer Systems International, Ltd.
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* All rights reserved. Unpublished -- rights reserved under
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* the Copyright Laws of the United States. USE OF A COPYRIGHT
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* NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
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* OR DISCLOSURE.
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*
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* THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
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* SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD. USE,
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* DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
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* PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
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* INTERNATIONAL, LTD.
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*
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* RESTRICTED RIGHTS LEGEND
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* Use, duplication, or disclosure by the Government is subject
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* to the restrictions as set forth in subparagraph (c)(l)(ii)
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* of the Rights in Technical Data and Computer Software clause
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* at DFARS 252.227-7013.
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*
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* HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
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* 1315 Dell Avenue
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* Campbell, CA 95008
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*
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*/
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#ifndef _CC_Listbase_hh
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#define _CC_Listbase_hh
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#include <stdio.h>
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#include "dti_cc/types.h"
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#ifndef NULL
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#define NULL 0
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#endif
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// forward declaration
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class CC_List_Iterator_base;
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class CC_Listbase;
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// Base classes for List template.
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// Link_base can be used by both doubly and singly linked list
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class CC_Link_base
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{
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friend class CC_Listbase;
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friend class CC_List_Iterator_base;
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public:
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CC_Link_base():f_next(NULL),f_prev(NULL) {}
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private:
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CC_Link_base *f_next;
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CC_Link_base *f_prev;
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};
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class CC_Listbase
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{
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friend class CC_List_Iterator_base;
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protected:
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CC_Link_base *remove(CC_List_Iterator_base &);
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public:
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CC_Listbase()
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: f_head (NULL), f_tail (NULL), f_length (0)
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{ }
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void insert (CC_Link_base *); /* both insert and append is the same,
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* throw ccException() if element is NULL
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*/
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void append (CC_Link_base *e) // in order to be Rogue Wave compatible
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{ insert(e); }
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void prepend (CC_Link_base *); /*
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* throw ccException() if element is NULL
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*/
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size_t entries() const // RW compatible
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{ return (f_length); }
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CC_Link_base *first() const
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{ return (f_head); }
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CC_Link_base *last() const
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{ return (f_tail); }
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CC_Link_base *removeLast();
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CC_Link_base *removeFirst();
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protected:
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CC_Link_base *f_head;
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CC_Link_base *f_tail;
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size_t f_length;
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};
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class CC_List_Iterator_base
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{
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friend class CC_Listbase;
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public:
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CC_List_Iterator_base (CC_Listbase *list); /* will throw ccException if
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* list == NULL
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*/
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// Obtain the current link entry.
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CC_Link_base *item() const
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{ return (f_current); }
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// Reset the iterator to the first list element.
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void reset();
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// Increment the iterator.
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CC_Boolean operator++();
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CC_Boolean operator--();
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protected:
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const CC_Listbase *f_list;
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CC_Link_base *f_previous;
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CC_Link_base *f_current;
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};
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#endif /* _CC_Listbasehh */
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/* DO NOT ADD ANY LINES AFTER THIS #endif */
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