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