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Merge pull request #5842 from ethereum/refactorStructEncoding

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[Yul] Refactor struct encoder.
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chriseth 2019-01-22 18:24:03 +01:00 committed by GitHub
commit a010e45166
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1 changed files with 24 additions and 26 deletions
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50
libsolidity/codegen/ABIFunctions.cpp
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@ -904,6 +904,8 @@ string ABIFunctions::abiEncodingFunctionStruct(
<#members>
{
// <memberName>
<preprocess>
let memberValue := <retrieveValue>
<encode>
}
</members>
@ -932,20 +934,10 @@ string ABIFunctions::abiEncodingFunctionStruct(
bool dynamicMember = memberTypeTo->isDynamicallyEncoded();
if (dynamicMember)
solAssert(dynamic, "");
Whiskers memberTempl(R"(
<preprocess>
let memberValue := <retrieveValue>
)" + (
dynamicMember ?
string(R"(
mstore(add(pos, <encodingOffset>), sub(tail, pos))
tail := <abiEncode>(memberValue, tail)
)") :
string(R"(
<abiEncode>(memberValue, add(pos, <encodingOffset>))
)")
)
);
members.push_back({});
members.back()["preprocess"] = "";
if (fromStorage)
{
solAssert(memberTypeFrom->isValueType() == memberTypeTo->isValueType(), "");
@ -956,36 +948,42 @@ string ABIFunctions::abiEncodingFunctionStruct(
{
if (storageSlotOffset != previousSlotOffset)
{
memberTempl("preprocess", "slotValue := sload(add(value, " + toCompactHexWithPrefix(storageSlotOffset) + "))");
members.back()["preprocess"] = "slotValue := sload(add(value, " + toCompactHexWithPrefix(storageSlotOffset) + "))";
previousSlotOffset = storageSlotOffset;
}
else
memberTempl("preprocess", "");
memberTempl("retrieveValue", shiftRightFunction(intraSlotOffset * 8) + "(slotValue)");
members.back()["retrieveValue"] = shiftRightFunction(intraSlotOffset * 8) + "(slotValue)";
}
else
{
solAssert(memberTypeFrom->dataStoredIn(DataLocation::Storage), "");
solAssert(intraSlotOffset == 0, "");
memberTempl("preprocess", "");
memberTempl("retrieveValue", "add(value, " + toCompactHexWithPrefix(storageSlotOffset) + ")");
members.back()["retrieveValue"] = "add(value, " + toCompactHexWithPrefix(storageSlotOffset) + ")";
}
}
else
{
memberTempl("preprocess", "");
string sourceOffset = toCompactHexWithPrefix(_from.memoryOffsetOfMember(member.name));
memberTempl("retrieveValue", "mload(add(value, " + sourceOffset + "))");
members.back()["retrieveValue"] = "mload(add(value, " + sourceOffset + "))";
}
memberTempl("encodingOffset", toCompactHexWithPrefix(encodingOffset));
Whiskers encodeTempl(
dynamicMember ?
string(R"(
mstore(add(pos, <encodingOffset>), sub(tail, pos))
tail := <abiEncode>(memberValue, tail)
)") :
string(R"(
<abiEncode>(memberValue, add(pos, <encodingOffset>))
)")
);
encodeTempl("encodingOffset", toCompactHexWithPrefix(encodingOffset));
encodingOffset += dynamicMember ? 0x20 : memberTypeTo->calldataEncodedSize();
EncodingOptions subOptions(_options);
subOptions.encodeFunctionFromStack = false;
memberTempl("abiEncode", abiEncodingFunction(*memberTypeFrom, *memberTypeTo, subOptions));
encodeTempl("abiEncode", abiEncodingFunction(*memberTypeFrom, *memberTypeTo, subOptions));
members.push_back({});
members.back()["encode"] = memberTempl.render();
members.back()["encode"] = encodeTempl.render();
members.back()["memberName"] = member.name;
}
templ("members", members);