83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/***************************************************************************
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list_element.h - description
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-------------------
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begin : Mon Mar 8 2004
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copyright : (C) 2004 by David Rokhvarg
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email : davidr@sangoma.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef LIST_ELEMENT_H
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#define LIST_ELEMENT_H
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enum LIST_ELEMENT_TYPE{
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BASE_LIST_ELEMENT = 1,
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CHAN_DEF_LIST_ELEMENT,
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SANGOMA_CARD_LIST_ELEMENT
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};
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#define DBG_LIST_ELEMENT 0
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#include "wancfg.h"
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/**Class used as an element of a linked list.
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*@author David Rokhvarg
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*/
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//it is an abstract class - user *must* write a sublclass to use it.
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class list_element {
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protected:
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char list_element_type;
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public:
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void * next;
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void * previous;
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list_element()
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{
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Debug(DBG_LIST_ELEMENT, ("list_element::list_element()\n"));
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next = previous = NULL;
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//must be set to real value in the subclasses
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list_element_type = BASE_LIST_ELEMENT;
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}
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virtual ~list_element() {}
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/*
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//no real work is done here. comment it out to reduce number of warnings
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//" list_element.h:204: warning: `class list_element_chan_def' has
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// virtual functions but non-virtual destructor".
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~list_element()
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{
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Debug(DBG_LIST_ELEMENT, ("list_element::~list_element()\n"));
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}
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*/
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void reset()
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{
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next = previous = NULL;
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}
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char get_element_type()
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{
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return list_element_type;
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}
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//set these functions to 0 to make the class abstract
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virtual int compare(list_element* element) = 0;
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virtual int compare(char* comparator) = 0;
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//virtual int compare(int comparator) = 0;
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//the comparator is char string in this case
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virtual char* get_comparator() = 0;
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};
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#endif
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