Method WriteSetVariableResult

src/SBC/DataTransfer.cpp:1438–1538

}

bool DataTransfer::WriteSetVariableResult(const char *varName, const ExpressionValue& value) noexcept
{
	// Calculate payload length
	const size_t varNameLength = strlen(varName);
	size_t payloadLength;
	String<StringLength50> rslt;
	switch (value.GetType())
	{
	case TypeCode::Bool:
	case TypeCode::DriverId_tc:
	case TypeCode::Uint32:
	case TypeCode::Float:
	case TypeCode::Int32:
	case TypeCode::Char:
		payloadLength = varNameLength;
		break;
	case TypeCode::CString:
		payloadLength = varNameLength + strlen(value.sVal);
		break;
	case TypeCode::IPAddress_tc:
	case TypeCode::MacAddress_tc:
	case TypeCode::DateTime_tc:
		// All these types are represented as strings
		value.AppendAsString(rslt.GetRef());
		payloadLength = varNameLength + rslt.strlen();
		break;
	case TypeCode::HeapString:
		payloadLength = varNameLength + value.shVal.GetLength();
		break;

	default:
		rslt.printf("unsupported type code %d", (int)value.type);
		payloadLength = varNameLength + rslt.strlen();
		break;
	}

	// Check if it fits
	if (!CanWritePacket(sizeof(EvaluationResultHeader) + payloadLength))
	{
		return false;
	}

	// Write packet header
	(void)WritePacketHeader(FirmwareRequest::VariableResult, sizeof(EvaluationResultHeader) + payloadLength);

	// Write partial header
	EvaluationResultHeader *header = WriteDataHeader<EvaluationResultHeader>();
	header->expressionLength = varNameLength;

	// Write variable name
	WriteData(varName, varNameLength);

	// Write data type and expression value
	switch (value.GetType())
	{
	case TypeCode::Bool:
		header->dataType = DataType::Bool;
		header->intValue = value.bVal ? 1 : 0;