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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 ContractCallDataEncoder.cpp
* @author Yann yann@ethdev.com
* @date 2014
* Ethereum IDE client.
*/
#include <QDebug>
#include <QMap>
#include <QStringList>
#include <libethcore/CommonJS.h>
#include <libsolidity/AST.h>
#include "QVariableDeclaration.h"
#include "QVariableDefinition.h"
#include "QFunctionDefinition.h"
#include "ContractCallDataEncoder.h"
using namespace dev;
using namespace dev::solidity;
using namespace dev::mix;
bytes ContractCallDataEncoder::encodedData()
{
bytes r(m_encodedData);
r.insert(r.end(), m_dynamicData.begin(), m_dynamicData.end());
return r;
}
void ContractCallDataEncoder::encode(QFunctionDefinition const* _function)
{
bytes hash = _function->hash().asBytes();
m_encodedData.insert(m_encodedData.end(), hash.begin(), hash.end());
}
void ContractCallDataEncoder::encode(QVariant const& _data, SolidityType const& _type)
{
if (_type.dynamicSize)
{
u256 count = 0;
if (_type.type == SolidityType::Type::Bytes)
count = encodeSingleItem(_data, _type, m_dynamicData);
else
{
QVariantList list = qvariant_cast<QVariantList>(_data);
for (auto const& item: list)
encodeSingleItem(item, _type, m_dynamicData);
count = list.size();
}
bytes sizeEnc(32);
toBigEndian(count, sizeEnc);
m_encodedData.insert(m_encodedData.end(), sizeEnc.begin(), sizeEnc.end());
}
else
encodeSingleItem(_data, _type, m_encodedData);
}
unsigned ContractCallDataEncoder::encodeSingleItem(QVariant const& _data, SolidityType const& _type, bytes& _dest)
{
if (_type.type == SolidityType::Type::Struct)
BOOST_THROW_EXCEPTION(dev::Exception() << dev::errinfo_comment("Struct parameters are not supported yet"));
unsigned const alignSize = 32;
QString src = _data.toString();
bytes result;
if (src.length() >= 2 && ((src.startsWith("\"") && src.endsWith("\"")) || (src.startsWith("\'") && src.endsWith("\'"))))
{
src = src.remove(src.length() - 1, 1).remove(0, 1);
QByteArray bytesAr = src.toLocal8Bit();
result = bytes(bytesAr.begin(), bytesAr.end());
}
else if (src.startsWith("0x"))
{
result = fromHex(src.toStdString().substr(2));
if (_type.type != SolidityType::Type::Bytes)
result = padded(result, alignSize);
}
else
{
bigint i(src.toStdString());
result = bytes(alignSize);
toBigEndian((u256)i, result);
}
unsigned dataSize = _type.dynamicSize ? result.size() : alignSize;
_dest.insert(_dest.end(), result.begin(), result.end());
if (_dest.size() % alignSize != 0)
_dest.resize((_dest.size() & ~(alignSize - 1)) + alignSize);
return dataSize;
}
void ContractCallDataEncoder::push(bytes const& _b)
{
m_encodedData.insert(m_encodedData.end(), _b.begin(), _b.end());
}
bigint ContractCallDataEncoder::decodeInt(dev::bytes const& _rawValue)
{
dev::u256 un = dev::fromBigEndian<dev::u256>(_rawValue);
if (un >> 255)
return (-s256(~un + 1));
return un;
}
QString ContractCallDataEncoder::toString(dev::bigint const& _int)
{
std::stringstream str;
str << std::dec << _int;
return QString::fromStdString(str.str());
}
dev::bytes ContractCallDataEncoder::encodeBool(QString const& _str)
{
bytes b(1);
b[0] = _str == "1" || _str.toLower() == "true " ? 1 : 0;
return padded(b, 32);
}
bool ContractCallDataEncoder::decodeBool(dev::bytes const& _rawValue)
{
byte ret = _rawValue.at(_rawValue.size() - 1);
return (ret != 0);
}
QString ContractCallDataEncoder::toString(bool _b)
{
return _b ? "true" : "false";
}
dev::bytes ContractCallDataEncoder::encodeBytes(QString const& _str)
{
QByteArray bytesAr = _str.toLocal8Bit();
bytes r = bytes(bytesAr.begin(), bytesAr.end());
return padded(r, 32);
}
dev::bytes ContractCallDataEncoder::decodeBytes(dev::bytes const& _rawValue)
{
return _rawValue;
}
QString ContractCallDataEncoder::toString(dev::bytes const& _b)
{
return QString::fromStdString(dev::toJS(_b));
}
QVariant ContractCallDataEncoder::decode(SolidityType const& _type, bytes const& _value)
{
bytesConstRef value(&_value);
bytes rawParam(32);
value.populate(&rawParam);
QSolidityType::Type type = _type.type;
if (type == QSolidityType::Type::SignedInteger || type == QSolidityType::Type::UnsignedInteger || type == QSolidityType::Type::Address)
return QVariant::fromValue(toString(decodeInt(rawParam)));
else if (type == QSolidityType::Type::Bool)
return QVariant::fromValue(toString(decodeBool(rawParam)));
else if (type == QSolidityType::Type::Bytes || type == QSolidityType::Type::Hash)
return QVariant::fromValue(toString(decodeBytes(rawParam)));
else if (type == QSolidityType::Type::Struct)
return QVariant::fromValue(QString("struct")); //TODO
else
BOOST_THROW_EXCEPTION(Exception() << errinfo_comment("Parameter declaration not found"));
}
QStringList ContractCallDataEncoder::decode(QList<QVariableDeclaration*> const& _returnParameters, bytes _value)
{
bytesConstRef value(&_value);
bytes rawParam(32);
QStringList r;
for (int k = 0; k <_returnParameters.length(); k++)
{
value.populate(&rawParam);
value = value.cropped(32);
QVariableDeclaration* dec = static_cast<QVariableDeclaration*>(_returnParameters.at(k));
SolidityType const& type = dec->type()->type();
r.append(decode(type, rawParam).toString());
}
return r;
}