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Prepare store for external function types.

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This commit is contained in:
chriseth 2020-11-02 21:07:27 +01:00
parent 06d0459a72
commit fea3f848f9
1 changed files with 28 additions and 13 deletions
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41
libsolidity/codegen/YulUtilFunctions.cpp
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@ -2487,22 +2487,37 @@ string YulUtilFunctions::cleanupFromStorageFunction(Type const& _type, bool _spl
string YulUtilFunctions::prepareStoreFunction(Type const& _type)
{
if (_type.category() == Type::Category::Function)
solUnimplementedAssert(dynamic_cast<FunctionType const&>(_type).kind() == FunctionType::Kind::Internal, "");
string functionName = "prepare_store_" + _type.identifier();
return m_functionCollector.createFunction(functionName, [&]() {
Whiskers templ(R"(
function <functionName>(value) -> ret {
ret := <actualPrepare>
}
)");
templ("functionName", functionName);
if (_type.category() == Type::Category::FixedBytes)
templ("actualPrepare", shiftRightFunction(256 - 8 * _type.storageBytes()) + "(value)");
solAssert(_type.isValueType(), "");
auto const* funType = dynamic_cast<FunctionType const*>(&_type);
if (funType && funType->kind() == FunctionType::Kind::External)
{
Whiskers templ(R"(
function <functionName>(addr, selector) -> ret {
ret := <prepareBytes>(<combine>(addr, selector))
}
)");
templ("functionName", functionName);
templ("prepareBytes", prepareStoreFunction(*TypeProvider::fixedBytes(24)));
templ("combine", combineExternalFunctionIdFunction());
return templ.render();
}
else
templ("actualPrepare", "value");
return templ.render();
{
solAssert(_type.sizeOnStack() == 1, "");
Whiskers templ(R"(
function <functionName>(value) -> ret {
ret := <actualPrepare>
}
)");
templ("functionName", functionName);
if (_type.category() == Type::Category::FixedBytes)
templ("actualPrepare", shiftRightFunction(256 - 8 * _type.storageBytes()) + "(value)");
else
templ("actualPrepare", "value");
return templ.render();
}
});
}