mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
113 lines
3.2 KiB
C++
113 lines
3.2 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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/**
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* Generator for code that handles LValues.
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*/
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#include <libsolidity/codegen/ir/IRLValue.h>
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#include <libsolidity/codegen/ir/IRGenerationContext.h>
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#include <libsolidity/codegen/YulUtilFunctions.h>
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#include <libsolidity/ast/AST.h>
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#include <libdevcore/Whiskers.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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IRLocalVariable::IRLocalVariable(
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IRGenerationContext& _context,
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VariableDeclaration const& _varDecl
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):
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IRLValue(_context, _varDecl.annotation().type),
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m_variableName(_context.localVariableName(_varDecl))
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{
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}
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string IRLocalVariable::storeValue(string const& _value, Type const& _type) const
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{
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solAssert(_type == *m_type, "Storing different types - not necessarily a problem.");
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return m_variableName + " := " + _value + "\n";
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}
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IRStorageItem::IRStorageItem(
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IRGenerationContext& _context,
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VariableDeclaration const& _varDecl
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):
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IRLValue(_context, _varDecl.annotation().type)
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{
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u256 slot;
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unsigned offset;
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std::tie(slot, offset) = _context.storageLocationOfVariable(_varDecl);
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m_slot = toCompactHexWithPrefix(slot);
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m_offset = offset;
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}
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IRStorageItem::IRStorageItem(
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IRGenerationContext& _context,
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string _slot,
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unsigned _offset,
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Type const& _type
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):
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IRLValue(_context, &_type),
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m_slot(move(_slot)),
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m_offset(_offset)
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{
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}
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string IRStorageItem::retrieveValue() const
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{
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if (!m_type->isValueType())
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return m_slot;
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solUnimplementedAssert(m_type->category() != Type::Category::Function, "");
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return m_context.utils().readFromStorage(*m_type, m_offset, false) + "(" + m_slot + ")";
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}
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string IRStorageItem::storeValue(string const& _value, Type const& _sourceType) const
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{
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if (m_type->isValueType())
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{
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solAssert(m_type->storageBytes() <= 32, "Invalid storage bytes size.");
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solAssert(m_type->storageBytes() > 0, "Invalid storage bytes size.");
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solAssert(m_type->storageBytes() + m_offset <= 32, "");
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solAssert(_sourceType == *m_type, "Different type, but might not be an error.");
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return Whiskers("sstore(<slot>, <update>(sload(<slot>), <prepare>(<value>)))\n")
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("slot", m_slot)
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("update", m_context.utils().updateByteSliceFunction(m_type->storageBytes(), m_offset))
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("prepare", m_context.utils().prepareStoreFunction(*m_type))
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("value", _value)
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.render();
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}
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else
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{
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solAssert(
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_sourceType.category() == m_type->category(),
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"Wrong type conversation for assignment."
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);
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if (m_type->category() == Type::Category::Array)
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solUnimplementedAssert(false, "");
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else if (m_type->category() == Type::Category::Struct)
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solUnimplementedAssert(false, "");
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else
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solAssert(false, "Invalid non-value type for assignment.");
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}
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}
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