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73 lines
1.8 KiB
73 lines
1.8 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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 3 of the License, or
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(at your option) any later version.
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cpp-ethereum 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file BloomFilter.h
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* @author Vladislav Gluhovsky <vlad@ethdev.com>
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* @date June 2015
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*/
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#pragma once
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#include "Common.h"
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namespace dev
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{
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namespace shh
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{
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class BloomFilter
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{
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public:
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virtual ~BloomFilter() {}
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BloomFilter(): m_filter(0) {}
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BloomFilter(unsigned _i): m_filter(_i) {}
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BloomFilter(AbridgedTopic const& _t): m_filter(AbridgedTopic::Arith(_t).convert_to<unsigned>()) {}
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bool matches(AbridgedTopic const& _t) const;
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virtual void add(AbridgedTopic const& _t) { m_filter |= AbridgedTopic::Arith(_t).convert_to<unsigned>(); }
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virtual void remove(AbridgedTopic const& ) {} // not implemented in this class, use derived class instead.
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protected:
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unsigned m_filter;
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};
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class SharedBloomFilter: public BloomFilter
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{
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public:
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virtual ~SharedBloomFilter() {}
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SharedBloomFilter() { init(); }
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SharedBloomFilter(unsigned _i): BloomFilter(_i) { init(); }
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SharedBloomFilter(AbridgedTopic const& _t): BloomFilter(_t) { init(); }
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void add(AbridgedTopic const& _t) override;
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void remove(AbridgedTopic const& _t) override;
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protected:
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void init() { for (unsigned i = 0; i < ArrSize; ++i) m_refCounter[i] = 0; }
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private:
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enum { ArrSize = 8 * AbridgedTopic::size };
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unsigned short m_refCounter[ArrSize];
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};
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}
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}
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