bintools/rcomp/src/LINKLIST.CPP
author raptorbot <raptorbot@systemstesthead.symbian.intra>
Sat, 16 Jan 2010 00:01:04 +0000
branchwip
changeset 121 5e5ae3e212b3
parent 0 044383f39525
permissions -rw-r--r--
Stderr to a file - avoid xml problems in error messages.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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* Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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*
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include "LINKLIST.H"
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// LinkedListIterator
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LinkedListIterator::LinkedListIterator(ListItem* aItem):
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	iCurrentItem(aItem)
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	{}
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LinkedListIterator::LinkedListIterator(const LinkedList& aList):
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	iCurrentItem(aList.iHead)
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	{}
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ListItem* LinkedListIterator::operator() ()
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	{
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	ListItem* p = iCurrentItem;
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	if(iCurrentItem)
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		iCurrentItem = iCurrentItem->iNext;
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	return p;
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	}
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void LinkedListIterator::Reset()
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	{
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	iCurrentItem = iList->iHead;
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	}
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// ListItem
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ListItem::ListItem():
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	iNext(NULL)
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	{}
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ListItem::~ListItem()
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	{}
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// LinkedList
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LinkedList::LinkedList():
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	iHead(NULL),
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	iTail(NULL)
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	{}
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LinkedList::~LinkedList()
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	{}
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void LinkedList::AddToHead(ListItem* aNewItem)
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	{
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	if(iHead)
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		aNewItem->iNext = iHead;
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	else
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		iTail = aNewItem;
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	iHead = aNewItem;
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	}
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void LinkedList::AddToTail(ListItem* aNewItem)
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	{
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	if(iTail)
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		iTail->iNext = aNewItem;
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	else
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		iHead = aNewItem;
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	iTail = aNewItem;
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	}
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void LinkedList::DeleteAll()
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	{
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	ListItem* item = iHead; 
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	while(item)
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		{
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		ListItem* p = item;
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		item=item->iNext;
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		delete p;
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		}
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	iHead = NULL;
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	iTail = NULL;
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	}
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void LinkedList::AddAfter(ListItem* aExistingItem,ListItem* aNewItem)
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	{
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	if(aExistingItem==NULL)
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		AddToHead(aNewItem);
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	else if(aExistingItem == iTail)
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		AddToTail(aNewItem);
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	else
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		{
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		aNewItem->iNext = aExistingItem->iNext;
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		aExistingItem->iNext = aNewItem;
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		}
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	}
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ListItem* LinkedList::Previous(ListItem* aItem)
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	{
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	assert(aItem != NULL);
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	assert(iHead != NULL);
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	ListItem* p = iHead;
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	if(p == aItem)
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		return NULL;
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	while(p->iNext != aItem && p->iNext != NULL)
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		p = p->iNext;
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	assert(p->iNext == aItem);
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	return p;		
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	}
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void LinkedList::RemoveItem(ListItem* aItem)
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	{
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	assert(aItem != NULL);
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	assert(iHead != NULL);
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	// If item to remove is at head of list.	
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	if (iHead == aItem)
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		{
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		if(iTail == aItem)	// Item being removed is only item in list
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			iTail = NULL;	
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		iHead = aItem->iNext;
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		return;
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		}
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    // Search through the list for the item.
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	ListItem* p = iHead;
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	while( p && (p->iNext!=aItem))
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		p = p->iNext;
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	assert(p!=NULL);
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	if (iTail == p->iNext)
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		iTail = p;
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	p->iNext = p->iNext->iNext;
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	}
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ListItem* LinkedList::TailItem()
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	{
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	return iTail;
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	}
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int LinkedList::IsEmpty()
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	{
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	return(iHead==NULL);
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	}