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100 lines
3.7 KiB
100 lines
3.7 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 Assembly.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 <sstream>
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#include <libdevcore/Common.h>
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#include <libdevcore/Assertions.h>
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#include <libevmcore/Instruction.h>
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#include <libevmasm/SourceLocation.h>
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#include "Exceptions.h"
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namespace dev
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{
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namespace eth
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{
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enum AssemblyItemType { UndefinedItem, Operation, Push, PushString, PushTag, PushSub, PushSubSize, PushProgramSize, Tag, PushData };
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class Assembly;
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class AssemblyItem
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{
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public:
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enum class JumpType { Ordinary, IntoFunction, OutOfFunction };
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AssemblyItem(u256 _push, SourceLocation const& _location = SourceLocation()):
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AssemblyItem(Push, _push, _location) { }
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AssemblyItem(Instruction _i, SourceLocation const& _location = SourceLocation()):
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AssemblyItem(Operation, byte(_i), _location) { }
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AssemblyItem(AssemblyItemType _type, u256 _data = 0, SourceLocation const& _location = SourceLocation()):
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m_type(_type),
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m_data(_data),
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m_location(_location)
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{
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}
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AssemblyItem tag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(Tag, m_data); }
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AssemblyItem pushTag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(PushTag, m_data); }
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AssemblyItemType type() const { return m_type; }
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u256 const& data() const { return m_data; }
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void setType(AssemblyItemType const _type) { m_type = _type; }
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void setData(u256 const& _data) { m_data = _data; }
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/// @returns the instruction of this item (only valid if type() == Operation)
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Instruction instruction() const { return Instruction(byte(m_data)); }
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/// @returns true iff the type and data of the items are equal.
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bool operator==(AssemblyItem const& _other) const { return m_type == _other.m_type && m_data == _other.m_data; }
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bool operator!=(AssemblyItem const& _other) const { return !operator==(_other); }
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/// @returns an upper bound for the number of bytes required by this item, assuming that
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/// the value of a jump tag takes @a _addressLength bytes.
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unsigned bytesRequired(unsigned _addressLength) const;
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int deposit() const;
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bool match(AssemblyItem const& _i) const { return _i.m_type == UndefinedItem || (m_type == _i.m_type && (m_type != Operation || m_data == _i.m_data)); }
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void setLocation(SourceLocation const& _location) { m_location = _location; }
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SourceLocation const& getLocation() const { return m_location; }
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void setJumpType(JumpType _jumpType) { m_jumpType = _jumpType; }
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JumpType getJumpType() const { return m_jumpType; }
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std::string getJumpTypeAsString() const;
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private:
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AssemblyItemType m_type;
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u256 m_data;
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SourceLocation m_location;
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JumpType m_jumpType = JumpType::Ordinary;
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};
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using AssemblyItems = std::vector<AssemblyItem>;
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using AssemblyItemsConstRef = vector_ref<AssemblyItem const>;
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std::ostream& operator<<(std::ostream& _out, AssemblyItem const& _item);
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std::ostream& operator<<(std::ostream& _out, AssemblyItemsConstRef _i);
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inline std::ostream& operator<<(std::ostream& _out, AssemblyItems const& _i) { return operator<<(_out, AssemblyItemsConstRef(&_i)); }
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}
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}
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