/*  This file is a part of JRTPLIB  Copyright (c) 1999-2004 Jori Liesenborgs  Contact: jori@lumumba.luc.ac.be  This library (JRTPLIB) was partially developed for my thesis at the  School for Knowledge Technology (Belgium/The Netherlands)  Permission is hereby granted, free of charge, to any person obtaining a  copy of this software and associated documentation files (the "Software"),  to deal in the Software without restriction, including without limitation  the rights to use, copy, modify, merge, publish, distribute, sublicense,  and/or sell copies of the Software, and to permit persons to whom the  Software is furnished to do so, subject to the following conditions:  The above copyright notice and this permission notice shall be included  in all copies or substantial portions of the Software.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS  IN THE SOFTWARE.*/#include "rtpmcasttable.h"#include "rtperror.h"RTPMCastTable::RTPMCastTable(){	int i;		for (i = 0 ; i < RTP_MCASTTABLE_HASHSIZE; i++)		hashtable[i] = NULL;}RTPMCastTable::~RTPMCastTable(){	Clear();}void RTPMCastTable::Clear(){	RTPMCastTableEntry *tmp,*tmpnext;	int i;		for (i = 0 ; i < RTP_MCASTTABLE_HASHSIZE; i++)	{		tmp = hashtable[i];		while (tmp != NULL)		{			tmpnext = tmp->next;			delete tmp;			tmp = tmpnext;		}		hashtable[i] = NULL;	}}int RTPMCastTable::AddMCastAddress(unsigned long mcastIP){	int index;	RTPMCastTableEntry *tmp,*tmpprev,*tmpnew;	unsigned long mcastIP2;	bool found;		index = (int)(mcastIP%((unsigned long)RTP_MCASTTABLE_HASHSIZE));	found = false;	tmpprev = NULL;	tmp = hashtable[index];		while (!found && tmp != NULL)	{		mcastIP2 = tmp->GetMCastIP();		if (mcastIP < mcastIP2)			found = true;		else		{			if (mcastIP == mcastIP2)				return ERR_RTP_ALREADYINMCASTGROUP;						tmpprev = tmp;			tmp = tmp->next;		}	}		tmpnew = new RTPMCastTableEntry(mcastIP);	if (tmpnew == NULL)		return ERR_RTP_OUTOFMEM;		tmpnew->next = tmp;	if (tmpprev == NULL)		hashtable[index] = tmpnew;	else		tmpprev->next = tmpnew;		curpos = -1;	curentry = NULL;		return 0;}int RTPMCastTable::DeleteMCastAddress(unsigned long mcastIP){	int index;	RTPMCastTableEntry *tmp,*tmpprev,*tmpnext;	unsigned long mcastIP2;	bool found;		index = (int)(mcastIP%((unsigned long)RTP_MCASTTABLE_HASHSIZE));	found = false;	tmpprev = NULL;	tmp = hashtable[index];		while (!found && tmp != NULL)	{		mcastIP2 = tmp->GetMCastIP();		if (mcastIP < mcastIP2)			return ERR_RTP_NOTINMCASTGROUP;		else		{			if (mcastIP == mcastIP2)				found = true;			else			{				tmpprev = tmp;				tmp = tmp->next;			}		}	}		tmpnext = tmp->next;	delete tmp;		if (tmpprev == NULL)		hashtable[index] = tmpnext;	else		tmpprev->next = tmpnext;	curpos = -1;	curentry = NULL;		return 0;}void RTPMCastTable::GotoFirstMCastAddress(){	curpos = 0;	while (curpos < RTP_MCASTTABLE_HASHSIZE && hashtable[curpos] == NULL)		curpos++;	if (curpos < RTP_MCASTTABLE_HASHSIZE)		curentry = hashtable[curpos];}bool RTPMCastTable::GetNextMCastAddress(unsigned long *mcastIP){	RTPMCastTableEntry *tmp;		if (curpos >= RTP_MCASTTABLE_HASHSIZE)		return false;		if (curentry != NULL)	{		tmp = curentry;		curentry = curentry->next;	}	else	{		curpos++;		while (curpos < RTP_MCASTTABLE_HASHSIZE && hashtable[curpos] == NULL)			curpos++;					if (curpos >= RTP_MCASTTABLE_HASHSIZE)			return false;		tmp = hashtable[curpos];		curentry = tmp->next;	}	*mcastIP = tmp->GetMCastIP();	return true;}