mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
67 lines
1.9 KiB
C++
67 lines
1.9 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/SymbolicIntVariable.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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SymbolicIntVariable::SymbolicIntVariable(
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Declaration const& _decl,
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smt::SolverInterface& _interface
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):
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SymbolicVariable(_decl, _interface)
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{
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solAssert(
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m_declaration.type()->category() == Type::Category::Integer ||
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m_declaration.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(int _seq)
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{
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m_interface.addAssertion(valueAtSequence(_seq) == 0);
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}
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void SymbolicIntVariable::setUnknownValue(int _seq)
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{
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auto intType = dynamic_pointer_cast<IntegerType const>(m_declaration.type());
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if (!intType)
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intType = make_shared<IntegerType>(160);
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m_interface.addAssertion(valueAtSequence(_seq) >= minValue(*intType));
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m_interface.addAssertion(valueAtSequence(_seq) <= maxValue(*intType));
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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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