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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qostdevice.h"
#include <e32base.h>
#include "usbostcomm.h"
class QOstDevicePrivate : public CActive
{
QOstDevice* q_ptr;
Q_DECLARE_PUBLIC(QOstDevice)
public:
QOstDevicePrivate() : CActive(CActive::EPriorityStandard) {
CActiveScheduler::Add(this);
}
~QOstDevicePrivate() {
Cancel();
}
TInt& AoFlags() { return ((TInt*)&iStatus)[1]; }
private:
void RunL();
void DoCancel();
private:
RUsbOstComm ost;
TBuf8<4096> readBuf;
QByteArray dataBuf;
TBool inReadyRead;
};
QOstDevice::QOstDevice(QObject *parent) :
QIODevice(parent), d_ptr(new QOstDevicePrivate)
{
d_ptr->q_ptr = this;
}
QOstDevice::~QOstDevice()
{
close();
delete d_ptr;
}
bool QOstDevice::open(int ostProtocolId)
{
if (isOpen())
return false;
Q_D(QOstDevice);
TInt err = d->ost.Connect();
if (!err) err = d->ost.Open();
const TVersion KRequiredVersion(1,1,0);
TVersion version = d->ost.Version();
if (version.iMajor < KRequiredVersion.iMajor ||
(version.iMajor == KRequiredVersion.iMajor && version.iMinor < KRequiredVersion.iMinor)) {
setErrorString("CODA version too old. At least version 4.0.18 (without TRK) is required.");
return false;
}
if (!err) err = d->ost.RegisterProtocolID((TOstProtIds)ostProtocolId, EFalse);
if (!err) {
d->ost.ReadMessage(d->iStatus, d->readBuf);
d->SetActive();
return QIODevice::open(ReadWrite | Unbuffered);
}
return false;
}
void QOstDevicePrivate::RunL()
{
Q_Q(QOstDevice);
//qDebug("QOstDevice received %d bytes q=%x", readBuf.Size(), q);
if (iStatus == KErrNone) {
QByteArray data = QByteArray::fromRawData((const char*)readBuf.Ptr(), readBuf.Size());
dataBuf.append(data);
readBuf.Zero();
ost.ReadMessage(iStatus, readBuf);
SetActive();
if (!inReadyRead) {
inReadyRead = true;
emit q->readyRead();
inReadyRead = false;
}
} else {
q->setErrorString(QString("Error %1 from RUsbOstComm::ReadMessage()").arg(iStatus.Int()));
}
//qDebug("-QOstDevicePrivate RunL");
}
void QOstDevicePrivate::DoCancel()
{
ost.ReadCancel();
}
void QOstDevice::close()
{
Q_D(QOstDevice);
QIODevice::close();
d->Cancel();
// RDbgTrcComm::Close isn't safe to call when not open, sigh
if (d->ost.Handle()) {
d->ost.Close();
}
}
qint64 QOstDevice::readData(char *data, qint64 maxSize)
{
Q_D(QOstDevice);
if (d->dataBuf.length() == 0 && !d->IsActive())
return -1;
qint64 available = qMin(maxSize, (qint64)d->dataBuf.length());
memcpy(data, d->dataBuf.constData(), available);
d->dataBuf.remove(0, available);
return available;
}
static const TInt KMaxOstPacketLen = 4096;
qint64 QOstDevice::writeData(const char *data, qint64 maxSize)
{
Q_D(QOstDevice);
TPtrC8 ptr((const TUint8*)data, (TInt)maxSize);
while (ptr.Length()) {
TPtrC8 fragment = ptr.Left(qMin(ptr.Length(), KMaxOstPacketLen));
//qDebug("QOstDevice writing %d bytes", fragment.Length());
TRequestStatus stat;
d->ost.WriteMessage(stat, fragment);
User::WaitForRequest(stat);
if (stat.Int() != KErrNone) {
setErrorString(QString("Error %1 from RUsbOstComm::WriteMessage()").arg(stat.Int()));
return -1;
}
ptr.Set(ptr.Mid(fragment.Length()));
}
emit bytesWritten(maxSize); //TODO does it matter this is emitted synchronously?
//qDebug("QOstDevice wrote %d bytes", ptr.Size());
return maxSize;
}
qint64 QOstDevice::bytesAvailable() const
{
Q_D(const QOstDevice);
return d->dataBuf.length();
}
bool QOstDevice::waitForReadyRead(int msecs)
{
Q_D(QOstDevice);
if (msecs >= 0) {
RTimer timer;
TInt err = timer.CreateLocal();
if (err) return false;
TRequestStatus timeoutStat;
timer.After(timeoutStat, msecs*1000);
User::WaitForRequest(timeoutStat, d->iStatus);
if (timeoutStat != KRequestPending) {
// Timed out
timer.Close();
return false;
} else {
// We got data, so cancel timer
timer.Cancel();
User::WaitForRequest(timeoutStat);
timer.Close();
// And drop through
}
} else {
// Just wait forever for data
User::WaitForRequest(d->iStatus);
}
// If we get here we have data
TInt err = d->iStatus.Int();
d->AoFlags() &= ~3; // This is necessary to clean up the scheduler as you're not supposed to bypass it like this
TRAP_IGNORE(d->RunL());
return err == KErrNone;
}
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