Method dispatchRoutine

libsolidity/codegen/ir/IRGenerator.cpp:1051–1130

}

std::string IRGenerator::dispatchRoutine(ContractDefinition const& _contract)
{
	Whiskers t(R"X(
		<?+cases>if iszero(lt(calldatasize(), 4))
		{
			let selector := <shr224>(calldataload(0))
			switch selector
			<#cases>
			case <functionSelector>
			{
				// <functionName>
				<delegatecallCheck>
				<externalFunction>()
			}
			</cases>
			default {}
		}</+cases>
		<?+receiveEther>if iszero(calldatasize()) { <receiveEther> }</+receiveEther>
		<fallback>
	)X");
	t("shr224", m_utils.shiftRightFunction(224));
	std::vector<std::map<std::string, std::string>> functions;
	for (auto const& function: _contract.interfaceFunctions())
	{
		functions.emplace_back();
		std::map<std::string, std::string>& templ = functions.back();
		templ["functionSelector"] = "0x" + function.first.hex();
		FunctionTypePointer const& type = function.second;
		templ["functionName"] = type->externalSignature();
		std::string delegatecallCheck;
		if (_contract.isLibrary())
		{
			solAssert(!type->isPayable(), "");
			if (type->stateMutability() > StateMutability::View)
				// If the function is not a view function and is called without DELEGATECALL,
				// we revert.
				delegatecallCheck =
					"if iszero(called_via_delegatecall) { " +
					m_utils.revertReasonIfDebugFunction("Non-view function of library called without DELEGATECALL") +
					"() }";
		}
		templ["delegatecallCheck"] = delegatecallCheck;

		templ["externalFunction"] = generateExternalFunction(_contract, *type);
	}
	t("cases", functions);
	FunctionDefinition const* etherReceiver = _contract.receiveFunction();
	if (etherReceiver)
	{
		solAssert(!_contract.isLibrary(), "");
		t("receiveEther", m_context.enqueueFunctionForCodeGeneration(*etherReceiver) + "() stop()");
	}
	else
		t("receiveEther", "");
	if (FunctionDefinition const* fallback = _contract.fallbackFunction())
	{
		solAssert(!_contract.isLibrary(), "");
		std::string fallbackCode;