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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file Assembly.h
* @author Gav Wood <i@gavwood.com>
* @date 2014
*/
#pragma once
#include <iostream>
#include <sstream>
#include <libdevcore/Common.h>
#include <libdevcore/Assertions.h>
#include <libevmcore/Instruction.h>
#include <libevmasm/SourceLocation.h>
#include "Exceptions.h"
namespace dev
{
namespace eth
{
enum AssemblyItemType { UndefinedItem, Operation, Push, PushString, PushTag, PushSub, PushSubSize, PushProgramSize, Tag, PushData };
class Assembly;
class AssemblyItem
{
public:
enum class JumpType { Ordinary, IntoFunction, OutOfFunction };
AssemblyItem(u256 _push, SourceLocation const& _location = SourceLocation()):
AssemblyItem(Push, _push, _location) { }
AssemblyItem(Instruction _i, SourceLocation const& _location = SourceLocation()):
AssemblyItem(Operation, byte(_i), _location) { }
AssemblyItem(AssemblyItemType _type, u256 _data = 0, SourceLocation const& _location = SourceLocation()):
m_type(_type),
m_data(_data),
m_location(_location)
{
}
AssemblyItem tag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(Tag, m_data); }
AssemblyItem pushTag() const { assertThrow(m_type == PushTag || m_type == Tag, Exception, ""); return AssemblyItem(PushTag, m_data); }
AssemblyItemType type() const { return m_type; }
u256 const& data() const { return m_data; }
void setType(AssemblyItemType const _type) { m_type = _type; }
void setData(u256 const& _data) { m_data = _data; }
/// @returns the instruction of this item (only valid if type() == Operation)
Instruction instruction() const { return Instruction(byte(m_data)); }
/// @returns true iff the type and data of the items are equal.
bool operator==(AssemblyItem const& _other) const { return m_type == _other.m_type && m_data == _other.m_data; }
bool operator!=(AssemblyItem const& _other) const { return !operator==(_other); }
/// @returns an upper bound for the number of bytes required by this item, assuming that
/// the value of a jump tag takes @a _addressLength bytes.
unsigned bytesRequired(unsigned _addressLength) const;
int deposit() const;
bool match(AssemblyItem const& _i) const { return _i.m_type == UndefinedItem || (m_type == _i.m_type && (m_type != Operation || m_data == _i.m_data)); }
void setLocation(SourceLocation const& _location) { m_location = _location; }
SourceLocation const& getLocation() const { return m_location; }
void setJumpType(JumpType _jumpType) { m_jumpType = _jumpType; }
JumpType getJumpType() const { return m_jumpType; }
std::string getJumpTypeAsString() const;
private:
AssemblyItemType m_type;
u256 m_data;
SourceLocation m_location;
JumpType m_jumpType = JumpType::Ordinary;
};
using AssemblyItems = std::vector<AssemblyItem>;
using AssemblyItemsConstRef = vector_ref<AssemblyItem const>;
std::ostream& operator<<(std::ostream& _out, AssemblyItem const& _item);
std::ostream& operator<<(std::ostream& _out, AssemblyItemsConstRef _i);
inline std::ostream& operator<<(std::ostream& _out, AssemblyItems const& _i) { return operator<<(_out, AssemblyItemsConstRef(&_i)); }
}
}
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