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Dynamic copy to memory.

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Christian
2015-02-12 11:33:10 +01:00
parent 79aec95228
commit adb434569c
7 changed files with 161 additions and 110 deletions
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CompilerUtils.cpp
+30 -11
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@@ -62,20 +62,22 @@ unsigned CompilerUtils::loadFromMemory(unsigned _offset, unsigned _bytes, bool _
}
}
unsigned CompilerUtils::storeInMemory(unsigned _offset, unsigned _bytes, bool _leftAligned,
bool _padToWordBoundaries)
unsigned CompilerUtils::storeInMemory(unsigned _offset, Type const& _type, bool _padToWordBoundaries)
{
if (_bytes == 0)
unsigned numBytes = prepareMemoryStore(_type, _padToWordBoundaries);
if (numBytes > 0)
m_context << u256(_offset) << eth::Instruction::MSTORE;
return numBytes;
}
void CompilerUtils::storeInMemoryDynamic(Type const& _type, bool _padToWordBoundaries)
{
unsigned numBytes = prepareMemoryStore(_type, _padToWordBoundaries);
if (numBytes > 0)
{
m_context << eth::Instruction::POP;
return 0;
m_context << eth::Instruction::DUP2 << eth::Instruction::MSTORE;
m_context << u256(numBytes) << eth::Instruction::ADD;
}
solAssert(_bytes <= 32, "Memory store of more than 32 bytes requested.");
if (_bytes != 32 && !_leftAligned && !_padToWordBoundaries)
// shift the value accordingly before storing
m_context << (u256(1) << ((32 - _bytes) * 8)) << eth::Instruction::MUL;
m_context << u256(_offset) << eth::Instruction::MSTORE;
return _padToWordBoundaries ? 32 : _bytes;
}
void CompilerUtils::moveToStackVariable(VariableDeclaration const& _variable)
@@ -114,5 +116,22 @@ unsigned CompilerUtils::getSizeOnStack(vector<shared_ptr<Type const>> const& _va
return size;
}
unsigned CompilerUtils::prepareMemoryStore(Type const& _type, bool _padToWordBoundaries)
{
unsigned _encodedSize = _type.getCalldataEncodedSize();
unsigned numBytes = _padToWordBoundaries ? getPaddedSize(_encodedSize) : _encodedSize;
bool leftAligned = _type.getCategory() == Type::Category::String;
if (numBytes == 0)
m_context << eth::Instruction::POP;
else
{
solAssert(numBytes <= 32, "Memory store of more than 32 bytes requested.");
if (numBytes != 32 && !leftAligned && !_padToWordBoundaries)
// shift the value accordingly before storing
m_context << (u256(1) << ((32 - numBytes) * 8)) << eth::Instruction::MUL;
}
return numBytes;
}
}
}