mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
75 lines
2.0 KiB
C++
75 lines
2.0 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/SymbolicIntVariable.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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SymbolicIntVariable::SymbolicIntVariable(
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Type const& _type,
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string const& _uniqueName,
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smt::SolverInterface& _interface
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):
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SymbolicVariable(_type, _uniqueName, _interface)
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{
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solAssert(
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_type.category() == Type::Category::Integer ||
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_type.category() == Type::Category::Address,
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""
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);
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}
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smt::Expression SymbolicIntVariable::valueAtSequence(int _seq) const
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{
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return m_interface.newInteger(uniqueSymbol(_seq));
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}
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void SymbolicIntVariable::setZeroValue()
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{
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m_interface.addAssertion(current() == 0);
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}
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void SymbolicIntVariable::setUnknownValue()
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{
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if (m_type.category() == Type::Category::Integer)
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{
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auto intType = dynamic_cast<IntegerType const*>(&m_type);
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solAssert(intType, "");
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m_interface.addAssertion(current() >= minValue(*intType));
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m_interface.addAssertion(current() <= maxValue(*intType));
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}
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else
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{
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solAssert(m_type.category() == Type::Category::Address, "");
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IntegerType addrType{160};
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m_interface.addAssertion(current() >= minValue(addrType));
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m_interface.addAssertion(current() <= maxValue(addrType));
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}
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}
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smt::Expression SymbolicIntVariable::minValue(IntegerType const& _t)
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{
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return smt::Expression(_t.minValue());
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}
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smt::Expression SymbolicIntVariable::maxValue(IntegerType const& _t)
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{
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return smt::Expression(_t.maxValue());
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}
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