solidity/libsolidity/formal/SSAVariable.cpp
2018-09-05 12:19:14 +02:00

87 lines
2.0 KiB
C++

/*
This file is part of solidity.
solidity 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.
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libsolidity/formal/SSAVariable.h>
#include <libsolidity/formal/SymbolicBoolVariable.h>
#include <libsolidity/formal/SymbolicIntVariable.h>
#include <libsolidity/ast/AST.h>
using namespace std;
using namespace dev;
using namespace dev::solidity;
SSAVariable::SSAVariable(
Declaration const& _decl,
smt::SolverInterface& _interface
)
{
resetIndex();
if (isInteger(_decl.type()->category()))
m_symbolicVar = make_shared<SymbolicIntVariable>(_decl, _interface);
else if (isBool(_decl.type()->category()))
m_symbolicVar = make_shared<SymbolicBoolVariable>(_decl, _interface);
else
{
solAssert(false, "");
}
}
bool SSAVariable::isSupportedType(Type::Category _category)
{
return isInteger(_category) || isBool(_category);
}
bool SSAVariable::isInteger(Type::Category _category)
{
return _category == Type::Category::Integer || _category == Type::Category::Address;
}
bool SSAVariable::isBool(Type::Category _category)
{
return _category == Type::Category::Bool;
}
void SSAVariable::resetIndex()
{
m_currentSequenceCounter = 0;
m_nextFreeSequenceCounter.reset (new int);
*m_nextFreeSequenceCounter = 1;
}
int SSAVariable::index() const
{
return m_currentSequenceCounter;
}
int SSAVariable::next() const
{
return *m_nextFreeSequenceCounter;
}
void SSAVariable::setZeroValue()
{
m_symbolicVar->setZeroValue(index());
}
void SSAVariable::setUnknownValue()
{
m_symbolicVar->setUnknownValue(index());
}