mirror of
https://github.com/RetroShare/RetroShare.git
synced 2025-01-07 05:38:09 -05:00
79b48d5a89
* adding Bloom filter to speed up finding RS peers. * fixed startup bug. (loops into FAILURE) git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@4357 b45a01b8-16f6-495d-af2f-9b41ad6348cc
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
#ifndef BITDHT_BLOOM_H
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#define BITDHT_BLOOM_H
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/*
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* bitdht/bdbloom.h
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*
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* BitDHT: An Flexible DHT library.
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*
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* Copyright 2011 by Robert Fernie
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License Version 3 as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA.
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*
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* Please report all bugs and problems to "bitdht@lunamutt.com".
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*
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*/
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#include <vector>
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#include <string>
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#include <iostream>
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#include <inttypes.h>
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class bloomFilter
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{
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public:
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bloomFilter(int m, int k);
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int setFilterBits(const std::string &hex);
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std::string getFilter();
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void printFilter(std::ostream &out);
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bool test(const std::string &hex); // takes first m bits.
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void add(const std::string &hex);
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uint32_t countBits();
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uint32_t filterBits();
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protected:
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void setHashFunction(int idx, uint32_t (*hashfn)(const std::string &));
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private:
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void setBit(int bit);
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bool isBitSet(int bit);
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std::vector<uint8_t> mBits;
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std::vector<uint32_t (*)(const std::string &)> mHashFns;
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uint32_t mFilterBits;
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uint32_t mNoHashs;
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uint32_t mNoElements;
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};
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/* our specific implementation */
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class bdBloom: public bloomFilter
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{
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public:
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bdBloom();
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};
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#endif
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