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96 lines
2.5 KiB
96 lines
2.5 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 MemoryDB.h
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* @author Gav Wood <i@gavwood.com>
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* @date 2014
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*/
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#pragma once
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#include <map>
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#include <libdevcore/Common.h>
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#include <libdevcore/FixedHash.h>
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#include <libdevcore/Log.h>
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#include <libdevcore/RLP.h>
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#include "SHA3.h"
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namespace dev
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{
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struct DBChannel: public LogChannel { static const char* name() { return "TDB"; } static const int verbosity = 18; };
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struct DBWarn: public LogChannel { static const char* name() { return "TDB"; } static const int verbosity = 1; };
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#define dbdebug clog(DBChannel)
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#define dbwarn clog(DBWarn)
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class MemoryDB
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{
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friend class EnforceRefs;
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public:
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MemoryDB() {}
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void clear() { m_over.clear(); }
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std::map<h256, std::string> get() const;
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std::string lookup(h256 _h) const;
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bool exists(h256 _h) const;
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void insert(h256 _h, bytesConstRef _v);
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bool kill(h256 _h);
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void purge();
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bytes lookupAux(h256 _h) const { auto h = aux(_h); return m_aux.count(h) ? m_aux.at(h) : bytes(); }
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void removeAux(h256 _h) { m_auxActive.erase(aux(_h)); }
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void insertAux(h256 _h, bytesConstRef _v) { auto h = aux(_h); m_auxActive.insert(h); m_aux[h] = _v.toBytes(); }
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std::set<h256> keys() const;
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protected:
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static h256 aux(h256 _k) { return h256(sha3(_k).ref().cropped(0, 24), h256::AlignLeft); }
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std::map<h256, std::string> m_over;
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std::map<h256, unsigned> m_refCount;
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std::set<h256> m_auxActive;
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std::map<h256, bytes> m_aux;
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mutable bool m_enforceRefs = false;
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};
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class EnforceRefs
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{
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public:
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EnforceRefs(MemoryDB const& _o, bool _r): m_o(_o), m_r(_o.m_enforceRefs) { _o.m_enforceRefs = _r; }
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~EnforceRefs() { m_o.m_enforceRefs = m_r; }
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private:
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MemoryDB const& m_o;
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bool m_r;
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};
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inline std::ostream& operator<<(std::ostream& _out, MemoryDB const& _m)
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{
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for (auto i: _m.get())
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{
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_out << i.first << ": ";
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_out << RLP(i.second);
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_out << " " << toHex(i.second);
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_out << std::endl;
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}
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return _out;
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}
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}
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