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87 lines
2.7 KiB
87 lines
2.7 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum 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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cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @author Christian <c@ethdev.com>
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* @date 2014
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* Utilities for the solidity compiler.
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*/
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#include <utility>
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#include <numeric>
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#include <libsolidity/AST.h>
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#include <libsolidity/Compiler.h>
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using namespace std;
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namespace dev {
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namespace solidity {
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void CompilerContext::addStateVariable(VariableDeclaration const& _declaration)
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{
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m_stateVariables[&_declaration] = m_stateVariablesSize;
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m_stateVariablesSize += _declaration.getType()->getStorageSize();
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}
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void CompilerContext::initializeLocalVariables(unsigned _numVariables)
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{
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if (_numVariables > 0)
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{
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*this << u256(0);
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for (unsigned i = 1; i < _numVariables; ++i)
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*this << eth::Instruction::DUP1;
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m_asm.adjustDeposit(-_numVariables);
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}
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}
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bool CompilerContext::isLocalVariable(Declaration const* _declaration) const
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{
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return std::find(m_localVariables.begin(), m_localVariables.end(), _declaration) != m_localVariables.end();
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}
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eth::AssemblyItem CompilerContext::getFunctionEntryLabel(FunctionDefinition const& _function) const
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{
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auto res = m_functionEntryLabels.find(&_function);
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if (asserts(res != m_functionEntryLabels.end()))
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BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Function entry label not found."));
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return res->second.tag();
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}
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unsigned CompilerContext::getBaseStackOffsetOfVariable(Declaration const& _declaration) const
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{
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auto res = find(begin(m_localVariables), end(m_localVariables), &_declaration);
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if (asserts(res != m_localVariables.end()))
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BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Variable not found on stack."));
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return unsigned(end(m_localVariables) - res - 1);
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}
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unsigned CompilerContext::baseToCurrentStackOffset(unsigned _baseOffset) const
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{
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return _baseOffset + m_asm.deposit();
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}
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u256 CompilerContext::getStorageLocationOfVariable(const Declaration& _declaration) const
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{
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auto it = m_stateVariables.find(&_declaration);
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if (it == m_stateVariables.end())
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BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Variable not found in storage."));
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return it->second;
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}
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}
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}
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