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/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* joris.guisson@gmail.com *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef DHTKCLOSESTNODESSEARCH_H
#define DHTKCLOSESTNODESSEARCH_H
#include <map>
#include "key.h"
#include "kbucket.h"
namespace dht
{
/**
* @author Joris Guisson <joris.guisson@gmail.com>
*
* Class used to store the search results during a K closests nodes search
* Note: we use a std::map because of lack of functionality in TQMap
*/
class KClosestNodesSearch
{
dht::Key key;
std::map<dht::Key,KBucketEntry> emap;
Uint32 max_entries;
public:
/**
* Constructor sets the key to compare with
* @param key The key to compare with
* @param max_entries The maximum number of entries can be in the map
* @return
*/
KClosestNodesSearch(const dht::Key & key,Uint32 max_entries);
virtual ~KClosestNodesSearch();
typedef std::map<dht::Key,KBucketEntry>::iterator Itr;
typedef std::map<dht::Key,KBucketEntry>::const_iterator CItr;
Itr begin() {return emap.begin();}
Itr end() {return emap.end();}
CItr begin() const {return emap.begin();}
CItr end() const {return emap.end();}
/// Get the target key of the search3
const dht::Key & getSearchTarget() const {return key;}
/// Get the number of entries.
bt::Uint32 getNumEntries() const {return emap.size();}
/**
* Try to insert an entry.
* @param e The entry
*/
void tryInsert(const KBucketEntry & e);
/**
* Gets the required space in bytes to pack the nodes.
* This should be used to determin the size of the buffer
* passed to pack.
* @return 26 * number of entries
*/
Uint32 requiredSpace() const {return emap.size()* 26;}
/**
* Pack the search results in a buffer, the buffer should have
* enough space to store requiredSpace() bytes.
* @param ba The buffer
*/
void pack(TQByteArray & ba);
};
}
#endif
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