Method accessCalldataTailFunction

libsolidity/codegen/YulUtilFunctions.cpp:2541–2569

}

std::string YulUtilFunctions::accessCalldataTailFunction(Type const& _type)
{
	solAssert(_type.isDynamicallyEncoded(), "");
	solAssert(_type.dataStoredIn(DataLocation::CallData), "");
	std::string functionName = "access_calldata_tail_" + _type.identifier();
	return m_functionCollector.createFunction(functionName, [&]() {
		return Whiskers(R"(
			function <functionName>(base_ref, ptr_to_tail) -> addr<?dynamicallySized>, length</dynamicallySized> {
				let rel_offset_of_tail := calldataload(ptr_to_tail)
				if iszero(slt(rel_offset_of_tail, sub(sub(calldatasize(), base_ref), sub(<neededLength>, 1)))) { <invalidCalldataTailOffset>() }
				addr := add(base_ref, rel_offset_of_tail)
				<?dynamicallySized>
					length := calldataload(addr)
					if gt(length, 0xffffffffffffffff) { <invalidCalldataTailLength>() }
					addr := add(addr, 32)
					if sgt(addr, sub(calldatasize(), mul(length, <calldataStride>))) { <shortCalldataTail>() }
				</dynamicallySized>
			}
		)")
		("functionName", functionName)
		("dynamicallySized", _type.isDynamicallySized())
		("neededLength", toCompactHexWithPrefix(_type.calldataEncodedTailSize()))
		("calldataStride", toCompactHexWithPrefix(_type.isDynamicallySized() ? dynamic_cast<ArrayType const&>(_type).calldataStride() : 0))
		("invalidCalldataTailOffset", revertReasonIfDebugFunction("Invalid calldata tail offset"))
		("invalidCalldataTailLength", revertReasonIfDebugFunction("Invalid calldata tail length"))
		("shortCalldataTail", revertReasonIfDebugFunction("Calldata tail too short"))
		.render();
	});
}

std::string YulUtilFunctions::nextArrayElementFunction(ArrayType const& _type)
{