#include "stream.h"
#include <QBuffer>

#undef  CHECK_STREAM_PRECOND
#ifndef QT_NO_DEBUG
#define CHECK_STREAM_PRECOND(retVal) \
    if (!dev) { \
        qWarning("msgpack::Stream: No device"); \
        return retVal; \
    }
#else
#define CHECK_STREAM_PRECOND(retVal) \
    if (!dev) { \
        return retVal; \
    }
#endif

#define CHECK_STREAM_WRITE_PRECOND(retVal) \
    CHECK_STREAM_PRECOND(retVal) \
    if (q_status != Ok) \
        return retVal;

MsgPackStream::MsgPackStream() :
    dev(0), compatibility(false), owndev(false), q_status(Ok)
{ }

MsgPackStream::MsgPackStream(QIODevice *d) :
    dev(d), compatibility(false), owndev(false)
{ }

MsgPackStream::MsgPackStream(QByteArray *a, QIODevice::OpenMode mode) :
    compatibility(false), owndev(true), q_status(Ok)
{
    QBuffer *buf = new QBuffer(a);
    buf->open(mode);
    dev = buf;
}

MsgPackStream::MsgPackStream(const QByteArray &a) :
    compatibility(false), owndev(true), q_status(Ok)
{
    QBuffer *buf = new QBuffer();
    buf->setData(a);
    buf->open(QIODevice::ReadOnly);
    dev = buf;
}

MsgPackStream::~MsgPackStream()
{
    if (owndev)
        delete dev;
}

void MsgPackStream::setDevice(QIODevice *d)
{
    if (owndev)
        delete dev;
    dev = d;
    owndev = false;
}

bool MsgPackStream::atEnd() const
{
    return dev ? dev->atEnd() : true;
}

void MsgPackStream::setCompatibility(bool isEnabled)
{
    compatibility = isEnabled;
}

MsgPackStream::Status MsgPackStream::status() const
{
    return q_status;
}

void MsgPackStream::resetStatus()
{
    q_status = Ok;
}

void MsgPackStream::setStatus(Status status)
{
    q_status = status;
}

MsgPackStream &MsgPackStream::operator >>(quint8 &u8)
{
    u8 = 0;
    CHECK_STREAM_PRECOND(*this)
    char c;
    if (!dev->getChar(&c))
        setStatus(ReadPastEnd);
    else
        u8 = quint8(c);
    return *this;
}