mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
118 lines
2.9 KiB
C++
118 lines
2.9 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libsolidity/formal/SymbolicVariables.h>
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#include <libsolidity/formal/SymbolicTypes.h>
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#include <libsolidity/ast/AST.h>
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using namespace std;
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using namespace dev;
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using namespace dev::solidity;
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SymbolicVariable::SymbolicVariable(
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TypePointer _type,
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string const& _uniqueName,
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smt::SolverInterface& _interface
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):
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m_type(move(_type)),
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m_uniqueName(_uniqueName),
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m_interface(_interface),
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m_ssa(make_shared<SSAVariable>())
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{
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}
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string SymbolicVariable::currentName() const
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{
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return uniqueSymbol(m_ssa->index());
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}
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string SymbolicVariable::uniqueSymbol(unsigned _index) const
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{
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return m_uniqueName + "_" + to_string(_index);
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}
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SymbolicBoolVariable::SymbolicBoolVariable(
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TypePointer _type,
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string const& _uniqueName,
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smt::SolverInterface&_interface
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):
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SymbolicVariable(move(_type), _uniqueName, _interface)
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{
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solAssert(m_type->category() == Type::Category::Bool, "");
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}
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smt::Expression SymbolicBoolVariable::valueAtIndex(int _index) const
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{
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return m_interface.newBool(uniqueSymbol(_index));
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}
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void SymbolicBoolVariable::setZeroValue()
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{
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m_interface.addAssertion(currentValue() == smt::Expression(false));
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}
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void SymbolicBoolVariable::setUnknownValue()
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{
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}
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SymbolicIntVariable::SymbolicIntVariable(
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TypePointer _type,
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string const& _uniqueName,
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smt::SolverInterface& _interface
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):
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SymbolicVariable(move(_type), _uniqueName, _interface)
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{
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solAssert(isNumber(m_type->category()), "");
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}
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smt::Expression SymbolicIntVariable::valueAtIndex(int _index) const
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{
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return m_interface.newInteger(uniqueSymbol(_index));
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}
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void SymbolicIntVariable::setZeroValue()
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{
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m_interface.addAssertion(currentValue() == 0);
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}
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void SymbolicIntVariable::setUnknownValue()
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{
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auto intType = dynamic_cast<IntegerType const*>(m_type.get());
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solAssert(intType, "");
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m_interface.addAssertion(currentValue() >= minValue(*intType));
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m_interface.addAssertion(currentValue() <= maxValue(*intType));
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}
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SymbolicAddressVariable::SymbolicAddressVariable(
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string const& _uniqueName,
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smt::SolverInterface& _interface
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):
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SymbolicIntVariable(make_shared<IntegerType>(160), _uniqueName, _interface)
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{
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}
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SymbolicFixedBytesVariable::SymbolicFixedBytesVariable(
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unsigned _numBytes,
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string const& _uniqueName,
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smt::SolverInterface& _interface
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):
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SymbolicIntVariable(make_shared<IntegerType>(_numBytes * 8), _uniqueName, _interface)
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{
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}
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