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Memory-storage copy.

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This commit is contained in:
chriseth 2015-06-22 12:50:09 +02:00
parent ee520f6022
commit 2eabaa4716
2 changed files with 18 additions and 12 deletions
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26
ArrayUtils.cpp
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@ -39,11 +39,6 @@ void ArrayUtils::copyArrayToStorage(ArrayType const& _targetType, ArrayType cons
// stack layout: [source_ref] [source_byte_off] [source length] target_ref target_byte_off (top)
solAssert(_targetType.location() == DataLocation::Storage, "");
solAssert(
_sourceType.location() == DataLocation::CallData ||
_sourceType.location() == DataLocation::Storage,
"Given array location not implemented."
);
IntegerType uint256(256);
Type const* targetBaseType = _targetType.isByteArray() ? &uint256 : &(*_targetType.getBaseType());
@ -52,6 +47,7 @@ void ArrayUtils::copyArrayToStorage(ArrayType const& _targetType, ArrayType cons
// TODO unroll loop for small sizes
bool sourceIsStorage = _sourceType.location() == DataLocation::Storage;
bool fromCalldata = _sourceType.location() == DataLocation::CallData;
bool directCopy = sourceIsStorage && sourceBaseType->isValueType() && *sourceBaseType == *targetBaseType;
bool haveByteOffsetSource = !directCopy && sourceIsStorage && sourceBaseType->getStorageBytes() <= 16;
bool haveByteOffsetTarget = !directCopy && targetBaseType->getStorageBytes() <= 16;
@ -71,6 +67,13 @@ void ArrayUtils::copyArrayToStorage(ArrayType const& _targetType, ArrayType cons
// retrieve source length
if (_sourceType.location() != DataLocation::CallData || !_sourceType.isDynamicallySized())
retrieveLength(_sourceType); // otherwise, length is already there
if (_sourceType.location() == DataLocation::Memory && _sourceType.isDynamicallySized())
{
// increment source pointer to point to data
m_context << eth::Instruction::SWAP1 << u256(0x20);
m_context << eth::Instruction::ADD << eth::Instruction::SWAP1;
}
// stack: target_ref source_ref source_length
m_context << eth::Instruction::DUP3;
// stack: target_ref source_ref source_length target_ref
@ -164,9 +167,9 @@ void ArrayUtils::copyArrayToStorage(ArrayType const& _targetType, ArrayType cons
StorageItem(m_context, *sourceBaseType).retrieveValue(SourceLocation(), true);
}
else if (sourceBaseType->isValueType())
CompilerUtils(m_context).loadFromMemoryDynamic(*sourceBaseType, true, true, false);
CompilerUtils(m_context).loadFromMemoryDynamic(*sourceBaseType, fromCalldata, true, false);
else
solAssert(false, "Copying of unknown type requested: " + sourceBaseType->toString());
solAssert(false, "Copying of type " + _sourceType.toString(false) + " to storage not yet supported.");
// stack: target_ref target_data_end source_data_pos target_data_pos source_data_end [target_byte_offset] [source_byte_offset] <source_value>...
solAssert(
2 + byteOffsetSize + sourceBaseType->getSizeOnStack() <= 16,
@ -419,6 +422,10 @@ void ArrayUtils::convertLengthToSize(ArrayType const& _arrayType, bool _pad) con
}
else
{
solAssert(
_arrayType.getBaseType()->getCalldataEncodedSize() > 0,
"Copying nested dynamic arrays not yet implemented."
);
if (!_arrayType.isByteArray())
m_context << _arrayType.getBaseType()->getCalldataEncodedSize() << eth::Instruction::MUL;
else if (_pad)
@ -485,6 +492,7 @@ void ArrayUtils::accessIndex(ArrayType const& _arrayType) const
switch (location)
{
case DataLocation::CallData:
case DataLocation::Memory:
if (!_arrayType.isByteArray())
{
m_context << eth::Instruction::SWAP1;
@ -494,7 +502,7 @@ void ArrayUtils::accessIndex(ArrayType const& _arrayType) const
if (_arrayType.getBaseType()->isValueType())
CompilerUtils(m_context).loadFromMemoryDynamic(
*_arrayType.getBaseType(),
true,
location == DataLocation::CallData,
!_arrayType.isByteArray(),
false
);
@ -527,8 +535,6 @@ void ArrayUtils::accessIndex(ArrayType const& _arrayType) const
m_context << eth::Instruction::ADD << u256(0);
}
break;
case DataLocation::Memory:
solAssert(false, "Memory lvalues not yet implemented.");
}
}

4
ExpressionCompiler.cpp
View File

@ -724,8 +724,8 @@ void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
case DataLocation::Storage:
setLValue<StorageArrayLength>(_memberAccess, type);
break;
default:
solAssert(false, "Unsupported array location.");
case DataLocation::Memory:
m_context << eth::Instruction::MLOAD;
break;
}
break;