mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
/*
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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 CodeFragment.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 <iostream>
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#include <libethsupport/Common.h>
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#include <libethcore/Instruction.h>
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#include "Exceptions.h"
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namespace eth
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{
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enum AssemblyItemType { Operation, Push, PushString, PushTag, Tag, PushData };
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class Assembly;
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class AssemblyItem
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{
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friend class Assembly;
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public:
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AssemblyItem(u256 _push): m_type(Push), m_data(_push) {}
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AssemblyItem(AssemblyItemType _type, AssemblyItem const& _tag): m_type(_type), m_data(_tag.m_data) { assert(_type == PushTag); assert(_tag.m_type == Tag); }
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AssemblyItem(Instruction _i): m_type(Operation), m_data((byte)_i) {}
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AssemblyItem(AssemblyItemType _type, u256 _data): m_type(_type), m_data(_data) {}
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AssemblyItemType type() const { return m_type; }
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u256 data() const { return m_data; }
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std::ostream& streamOut(std::ostream& _out) const;
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private:
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AssemblyItemType m_type;
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u256 m_data;
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};
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class Assembly
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{
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public:
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AssemblyItem newTag() { return AssemblyItem(Tag, m_usedTags++); }
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AssemblyItem newData(bytes const& _data) { auto h = sha3(_data); m_data[h] = _data; return AssemblyItem(PushData, h); }
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AssemblyItem newPushString(std::string const& _data) { auto b = asBytes(_data); auto h = sha3(b); m_data[h] = b; return AssemblyItem(PushString, h); }
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void append(AssemblyItem const& _i) { m_items.push_back(_i); }
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bytes assemble() const;
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void append(Assembly const& _a);
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std::ostream& streamOut(std::ostream& _out) const;
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private:
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u256 m_usedTags = 0;
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std::vector<AssemblyItem> m_items;
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std::map<h256, bytes> m_data;
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};
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}
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