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#include "qcanbusframe.h"

#include <QtCore/qdatastream.h>

QT_BEGIN_NAMESPACE

/*!
    \class QCanBusFrame
    \inmodule QtSerialBus
    \since 5.6

    \brief QCanBusFrame is a container class representing a single CAN frame.

    \l QCanBusDevice can use QCanBusFrame for read and write operations. It contains the frame
    identifier and the data payload. QCanBusFrame contains the timestamp of the moment it was read.

    \sa QCanBusFrame::TimeStamp
*/

/*!
    \fn QCanBusFrame::QCanBusFrame(QCanBusFrame::FrameType type)

    Constructs a CAN frame of the specified \a type.
*/

/*!
    \fn QCanBusFrame::QCanBusFrame(quint32 identifier, const QByteArray &data)

    Constructs a CAN frame using \a identifier as the frame identifier and \a data as the payload.
*/

/*!
    \fn bool QCanBusFrame::isValid() const

    Returns \c false if the \l frameType() is \l InvalidFrame,
    the \l hasExtendedFrameFormat() is not set although \l frameId() is longer than 11 bit or
    the payload is longer than the maximal permitted payload length of 64 byte.

    Otherwise this function returns \c true.
*/

/*!
    \fn QCanBusFrame::setFrameId(quint32 newFrameId)

    Sets the identifier of the CAN frame to \a newFrameId. The maximum size of a CAN frame
    identifier is 11 bits, which can be extended up to 29 bits by supporting the \e {CAN extended frame
    format}. The \e {CAN extended frame format} setting is automatically adapted to match \a newFrameId.

    \sa frameId(), hasExtendedFrameFormat()
*/

/*!
    \fn QCanBusFrame::setPayload(const QByteArray &data)

    Sets \a data as the payload for the CAN frame. The maximum size of payload is 8 bytes, which can
    be extended up to 64 bytes by supporting \e {Flexible Data-Rate}. Flexible Data-Rate has to be
    enabled on the \l QCanBusDevice by setting the \l QCanBusDevice::CanFdKey.

    Frames of type \l RemoteRequestFrame (RTR) do not have a payload. However they have to
    provide an indication of the responses expected payload length. To set the length expection it
    is necessary to set a fake payload whose length matches the expected payload length of the
    response. One way of doing this might be as follows:

    \code
        QCanBusFrame frame(QCanBusFrame::RemoteRequestFrame);
        int expectedResponseLength = ...;
        frame.setPayload(QByteArray(expectedResponseLength, 0));
    \endcode


    \sa payload()
*/

/*!
    \fn QCanBusFrame::setTimeStamp(const TimeStamp &ts)

    Sets \a ts as the timestamp for the CAN frame. Usually, this function is not needed, because the
    timestamp is created during the read operation and not needed during the write operation.

    \sa QCanBusFrame::TimeStamp
*/

/*!
    \fn quint32 QCanBusFrame::frameId() const

    Returns the CAN frame identifier. If the CAN frame uses the
    extended frame format, the identifier has a maximum of 29 bits;
    otherwise 11 bits.

    If the frame is of \l ErrorFrame type, this ID is always 0.

    \sa setFrameId(), hasExtendedFrameFormat()
*/

/*!
    \fn bool QCanBusFrame::hasExtendedFrameFormat() const

    Returns \c true if the CAN frame uses a 29bit identifier;
    otherwise \c false, implying an 11bit identifier.

    \sa setExtendedFrameFormat(), frameId()
*/

/*!
    \fn  void QCanBusFrame::setExtendedFrameFormat(bool isExtended)

    Sets the extended frame format flag to \a isExtended.

    \sa hasExtendedFrameFormat()
*/

/*!
    \enum QCanBusFrame::FrameType

    This enum describes the type of the CAN frame.

    \value UnknownFrame         The frame type is unknown.
    \value DataFrame            This value represents a data frame.
    \value ErrorFrame           This value represents an error frame.
    \value RemoteRequestFrame   This value represents a remote request.
    \value InvalidFrame         This value represents an invalid frame.
                                This type is used for error reporting.

    \sa setFrameType()
*/

/*!
    \enum QCanBusFrame::FrameError

    This enum describes the possible error types.

    \value NoError                      No error has occurred.
    \value TransmissionTimeoutError     The transmission has timed out.
    \value LostArbitrationError         The frame could not be sent due to lost
                                        arbitration on the bus.
    \value ControllerError              The controller encountered an error.
    \value ProtocolViolationError       A protocol violation has occurred.
    \value TransceiverError             A transceiver error occurred
    \value MissingAcknowledgmentError   The transmission received no
                                        acknowledgment.
    \value BusOffError                  The CAN bus is offline.
    \value BusError                     A CAN bus error occurred.
    \value ControllerRestartError       The controller restarted.
    \value UnknownError                 An unknown error has occurred.
    \value AnyError                     Matches every other error type.
*/

/*!
    \fn FrameType QCanBusFrame::frameType() const

    Returns the type of the frame.

    \sa setFrameType()
*/

/*!
    \fn void QCanBusFrame::setFrameType(FrameType newType)

    Sets the type of the frame to \a newType.

    \sa frameType()
*/

/*!
    \fn QByteArray QCanBusFrame::payload() const

    Returns the data payload of the frame.

    \sa setPayload()
*/

/*!
    \fn TimeStamp QCanBusFrame::timeStamp() const

    Returns the timestamp of the frame.

    \sa QCanBusFrame::TimeStamp, QCanBusFrame::setTimeStamp()
*/

/*!
    \fn FrameErrors QCanBusFrame::error() const

    Returns the error of the current error frame. If the frame
    is not an \l ErrorFrame, this function returns \l NoError.

    \sa setError()
*/

/*!
    \fn void QCanBusFrame::setError(FrameErrors error)

    Sets the frame's \a error type. This function does nothing if
    \l frameType() is not an \l ErrorFrame.

    \sa error()
*/

/*!
    \class QCanBusFrame::TimeStamp
    \inmodule QtSerialBus
    \since 5.6

    \brief The TimeStamp class provides timestamp information with microsecond precision.
*/

/*!
    \fn TimeStamp::TimeStamp(qint64 s, qint64 usec)

    Constructs a TimeStamp in seconds, \a s, and microseconds, \a usec.
*/

/*!
    \fn qint64 TimeStamp::seconds() const

    Returns the seconds of the timestamp.

    \sa TimeStamp::setSeconds()
*/

/*!
    \fn qint64 TimeStamp::microSeconds() const

    Returns the microseconds of the timestamp.

    \sa TimeStamp::setMicroSeconds
*/

/*!
    \fn TimeStamp::setSeconds(qint64 s)

    Sets the seconds in the timestamp type to \a s.

    \sa TimeStamp::seconds()
*/

/*!
    \fn TimeStamp::setMicroSeconds(qint64 usec)

    Sets the microseconds in the timestamp type to \a usec.

    \sa TimeStamp::microSeconds
*/

#ifndef QT_NO_DATASTREAM

/*! \relates QCanBusFrame

    Writes a \a frame to the stream (\a out) and returns a reference
    to the it.
*/
QDataStream &operator<<(QDataStream &out, const QCanBusFrame &frame)
{
    out << frame.frameId();
    out << static_cast<quint8>(frame.frameType());
    out << static_cast<quint8>(frame.version);
    out << frame.hasExtendedFrameFormat();
    out << frame.payload();
    const QCanBusFrame::TimeStamp stamp = frame.timeStamp();
    out << stamp.seconds();
    out << stamp.microSeconds();
    return out;
}

/*! \relates QCanBusFrame

    Reads a \a frame from the stream (\a in) and returns a
    reference to the it.
*/
QDataStream &operator>>(QDataStream &in, QCanBusFrame &frame)
{
    quint32 frameId;
    quint8 frameType;
    quint8 version;
    bool extendedFrameFormat;
    QByteArray payload;
    qint64 seconds;
    qint64 microSeconds;

    in >> frameId >> frameType >> version >> extendedFrameFormat
       >> payload >> seconds >> microSeconds;

    frame.setFrameId(frameId);
    frame.version = version;

    frame.setFrameType(static_cast<QCanBusFrame::FrameType>(frameType));
    frame.setExtendedFrameFormat(extendedFrameFormat);
    frame.setPayload(payload);

    frame.setTimeStamp(QCanBusFrame::TimeStamp(seconds, microSeconds));

    return in;
}

#endif // QT_NO_DATASTREAM

QT_END_NAMESPACE
