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Fix for signed integers in storage.

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This commit is contained in:
chriseth 2015-04-16 17:43:40 +02:00
parent 6e5de4832d
commit 5622364a98
1 changed files with 16 additions and 0 deletions
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16
LValue.cpp
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@ -107,6 +107,11 @@ void StorageItem::retrieveValue(SourceLocation const&, bool _remove) const
<< u256(0x100) << eth::Instruction::EXP << eth::Instruction::SWAP1 << eth::Instruction::DIV;
if (m_dataType.getCategory() == Type::Category::FixedBytes)
m_context << (u256(0x1) << (256 - 8 * m_dataType.getStorageBytes())) << eth::Instruction::MUL;
else if (
m_dataType.getCategory() == Type::Category::Integer &&
dynamic_cast<IntegerType const&>(m_dataType).isSigned()
)
m_context << u256(m_dataType.getStorageBytes() - 1) << eth::Instruction::SIGNEXTEND;
else
m_context << ((u256(0x1) << (8 * m_dataType.getStorageBytes())) - 1) << eth::Instruction::AND;
}
@ -148,6 +153,17 @@ void StorageItem::storeValue(Type const& _sourceType, SourceLocation const& _loc
m_context
<< (u256(0x1) << (256 - 8 * dynamic_cast<FixedBytesType const&>(m_dataType).getNumBytes()))
<< eth::Instruction::SWAP1 << eth::Instruction::DIV;
else if (
m_dataType.getCategory() == Type::Category::Integer &&
dynamic_cast<IntegerType const&>(m_dataType).isSigned()
)
// remove the higher order bits
m_context
<< (u256(1) << (8 * (32 - m_dataType.getStorageBytes())))
<< eth::Instruction::SWAP1
<< eth::Instruction::DUP2
<< eth::Instruction::MUL
<< eth::Instruction::DIV;
m_context << eth::Instruction::MUL << eth::Instruction::OR;
// stack: value storage_ref updated_value
m_context << eth::Instruction::SWAP1 << eth::Instruction::SSTORE;