qt-everywhere-src-5.14.1/qtconnectivity/src/bluetooth/qlowenergydescriptor.cpp - orbit - Git at Google

 /***************************************************************************
 **
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Copyright (C) 2016 BlackBerry Limited. All rights reserved.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtBluetooth module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 3 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
 ** packaging of this file. Please review the following information to
 ** ensure the GNU Lesser General Public License version 3 requirements
 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 2.0 or (at your option) the GNU General
 ** Public license version 3 or any later version approved by the KDE Free
 ** Qt Foundation. The licenses are as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
 ** included in the packaging of this file. Please review the following
 ** information to ensure the GNU General Public License requirements will
 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
 ** https://www.gnu.org/licenses/gpl-3.0.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtBluetooth/QLowEnergyService>
 #include "qlowenergyserviceprivate_p.h"
 #include "qlowenergydescriptor.h"

 QT_BEGIN_NAMESPACE

 /*!
     \class QLowEnergyDescriptor
     \inmodule QtBluetooth
     \brief The QLowEnergyDescriptor class stores information about the Bluetooth
     Low Energy descriptor.
     \since 5.4

     QLowEnergyDescriptor provides information about a Bluetooth Low Energy
     descriptor's \l name(), \l uuid(), \l value() and \l handle(). Descriptors are
     encapsulated by Bluetooth Low Energy characteristics and provide additional
     contextual information about the characteristic (data format, notification activation
     and so on).

     The descriptor value may be written via the \l QLowEnergyService instance
     that manages the service to which this descriptor belongs. The
     \l {QLowEnergyService::writeDescriptor()} function writes the new value.
     The \l {QLowEnergyService::descriptorWritten()} signal
     is emitted upon success. The cached \l value() of this object is updated accordingly.

     \sa QLowEnergyService, QLowEnergyCharacteristic
 */

 struct QLowEnergyDescriptorPrivate
 {
     QLowEnergyHandle charHandle;
     QLowEnergyHandle descHandle;
 };

 /*!
     Construct a new QLowEnergyDescriptor. A default-constructed instance
     of this class is always invalid.
 */
 QLowEnergyDescriptor::QLowEnergyDescriptor():
     d_ptr(nullptr)
 {
 }

 /*!
     Construct a new QLowEnergyDescriptor that is a copy of \a other.

     The two copies continue to share the same underlying data which does not detach
     upon write.
 */
 QLowEnergyDescriptor::QLowEnergyDescriptor(const QLowEnergyDescriptor &other):
     d_ptr(other.d_ptr)
 {
     if (other.data) {
         data = new QLowEnergyDescriptorPrivate();
         data->charHandle = other.data->charHandle;
         data->descHandle = other.data->descHandle;
     }
 }

 /*!
     \internal

 */
 QLowEnergyDescriptor::QLowEnergyDescriptor(QSharedPointer<QLowEnergyServicePrivate> p,
                                            QLowEnergyHandle charHandle,
                                            QLowEnergyHandle descHandle):
     d_ptr(p)
 {
     data = new QLowEnergyDescriptorPrivate();
     data->charHandle = charHandle;
     data->descHandle = descHandle;

 }

 /*!
     Destroys the QLowEnergyDescriptor object.
 */
 QLowEnergyDescriptor::~QLowEnergyDescriptor()
 {
     delete data;
 }

 /*!
     Makes a copy of \a other and assigns it to this QLowEnergyDescriptor object.
     The two copies continue to share the same service and controller details.
 */
 QLowEnergyDescriptor &QLowEnergyDescriptor::operator=(const QLowEnergyDescriptor &other)
 {
     d_ptr = other.d_ptr;

     if (!other.data) {
         if (data) {
             delete data;
             data = nullptr;
         }
     } else {
         if (!data)
             data = new QLowEnergyDescriptorPrivate();

         data->charHandle = other.data->charHandle;
         data->descHandle = other.data->descHandle;
     }

     return *this;
 }

 /*!
     Returns \c true if \a other is equal to this QLowEnergyCharacteristic; otherwise \c false.

     Two QLowEnergyDescriptor instances are considered to be equal if they refer to
     the same descriptor on the same remote Bluetooth Low Energy device or both
     instances have been default-constructed.
  */
 bool QLowEnergyDescriptor::operator==(const QLowEnergyDescriptor &other) const
 {
     if (d_ptr != other.d_ptr)
         return false;

     if ((data && !other.data) || (!data && other.data))
         return false;

     if (!data)
         return true;

     if (data->charHandle != other.data->charHandle
         || data->descHandle != other.data->descHandle) {
         return false;
     }

     return true;
 }

 /*!
     Returns \c true if \a other is not equal to this QLowEnergyCharacteristic; otherwise \c false.

     Two QLowEnergyDescriptor instances are considered to be equal if they refer to
     the same descriptor on the same remote Bluetooth Low Energy device  or both
     instances have been default-constructed.
  */
 bool QLowEnergyDescriptor::operator!=(const QLowEnergyDescriptor &other) const
 {
     return !(*this == other);
 }

 /*!
     Returns \c true if the QLowEnergyDescriptor object is valid, otherwise returns \c false.

     An invalid descriptor instance is not associated with any service (default-constructed)
     or the associated service is no longer valid due to a disconnect from
     the underlying Bluetooth Low Energy device, for example. Once the object is invalid
     it cannot become valid anymore.

     \note If a QLowEnergyDescriptor instance turns invalid due to a disconnect
     from the underlying device, the information encapsulated by the current
     instance remains as it was at the time of the disconnect. Therefore it can be
     retrieved after the disconnect event.
 */
 bool QLowEnergyDescriptor::isValid() const
 {
     if (d_ptr.isNull() || !data)
         return false;

     if (d_ptr->state == QLowEnergyService::InvalidService)
         return false;

     return true;
 }

 /*!
     Returns the UUID of this descriptor if \l isValid() returns \c true; otherwise a
     \l {QUuid::isNull()}{null} UUID.
 */
 QBluetoothUuid QLowEnergyDescriptor::uuid() const
 {
     if (d_ptr.isNull() || !data
                        || !d_ptr->characteristicList.contains(data->charHandle)
                        || !d_ptr->characteristicList[data->charHandle].
                                         descriptorList.contains(data->descHandle)) {
         return QBluetoothUuid();
     }

     return d_ptr->characteristicList[data->charHandle].descriptorList[data->descHandle].uuid;
 }

 /*!
     Returns the handle of the descriptor or \c 0 if the handle
     cannot be accessed on the platform or the descriptor is invalid.

     \note On \macos and iOS handles can differ from 0, but these
     values have no special meaning outside of internal/private API.
 */
 QLowEnergyHandle QLowEnergyDescriptor::handle() const
 {
     if (!data)
         return 0;

     return data->descHandle;
 }

 /*!
     Returns the cached value of the descriptor.

     The cached descriptor value may be updated using
     \l QLowEnergyService::writeDescriptor() or \l QLowEnergyService::readDescriptor().
 */
 QByteArray QLowEnergyDescriptor::value() const
 {
     if (d_ptr.isNull() || !data
                        || !d_ptr->characteristicList.contains(data->charHandle)
                        || !d_ptr->characteristicList[data->charHandle].
                                         descriptorList.contains(data->descHandle)) {
         return QByteArray();
     }

     return d_ptr->characteristicList[data->charHandle].descriptorList[data->descHandle].value;
 }

 /*!
     Returns the human-readable name of the descriptor.

     The name is based on the descriptor's \l type(). The complete list
     of descriptor types can be found under
     \l {https://developer.bluetooth.org/gatt/descriptors/Pages/DescriptorsHomePage.aspx}{Bluetooth.org Descriptors}.

     The returned string is empty if the \l type() is unknown.

     \sa type(), QBluetoothUuid::descriptorToString()
 */

 QString QLowEnergyDescriptor::name() const
 {
     return QBluetoothUuid::descriptorToString(type());
 }

 /*!
     Returns the type of the descriptor.

     \sa name()
  */
 QBluetoothUuid::DescriptorType QLowEnergyDescriptor::type() const
 {
     const QBluetoothUuid u = uuid();
     bool ok = false;
     quint16 shortUuid = u.toUInt16(&ok);

     if (!ok)
         return QBluetoothUuid::UnknownDescriptorType;

     switch (shortUuid) {
     case QBluetoothUuid::CharacteristicExtendedProperties:
     case QBluetoothUuid::CharacteristicUserDescription:
     case QBluetoothUuid::ClientCharacteristicConfiguration:
     case QBluetoothUuid::ServerCharacteristicConfiguration:
     case QBluetoothUuid::CharacteristicPresentationFormat:
     case QBluetoothUuid::CharacteristicAggregateFormat:
     case QBluetoothUuid::ValidRange:
     case QBluetoothUuid::ExternalReportReference:
     case QBluetoothUuid::ReportReference:
         return (QBluetoothUuid::DescriptorType) shortUuid;
     default:
         break;
     }

     return QBluetoothUuid::UnknownDescriptorType;
 }

 /*!
     \internal

     Returns the handle of the characteristic to which this descriptor belongs
  */
 QLowEnergyHandle QLowEnergyDescriptor::characteristicHandle() const
 {
     if (d_ptr.isNull() || !data)
         return 0;

     return data->charHandle;
 }

 QT_END_NAMESPACE
	/***************************************************************************
	**
	** Copyright (C) 2016 The Qt Company Ltd.
	** Copyright (C) 2016 BlackBerry Limited. All rights reserved.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the QtBluetooth module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** GNU Lesser General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU Lesser
	** General Public License version 3 as published by the Free Software
	** Foundation and appearing in the file LICENSE.LGPL3 included in the
	** packaging of this file. Please review the following information to
	** ensure the GNU Lesser General Public License version 3 requirements
	** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
	**
	** GNU General Public License Usage
	** Alternatively, this file may be used under the terms of the GNU
	** General Public License version 2.0 or (at your option) the GNU General
	** Public license version 3 or any later version approved by the KDE Free
	** Qt Foundation. The licenses are as published by the Free Software
	** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
	** included in the packaging of this file. Please review the following
	** information to ensure the GNU General Public License requirements will
	** be met: https://www.gnu.org/licenses/gpl-2.0.html and
	** https://www.gnu.org/licenses/gpl-3.0.html.
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include <QtBluetooth/QLowEnergyService>
	#include "qlowenergyserviceprivate_p.h"
	#include "qlowenergydescriptor.h"

	QT_BEGIN_NAMESPACE

	/*!
	\class QLowEnergyDescriptor
	\inmodule QtBluetooth
	\brief The QLowEnergyDescriptor class stores information about the Bluetooth
	Low Energy descriptor.
	\since 5.4

	QLowEnergyDescriptor provides information about a Bluetooth Low Energy
	descriptor's \l name(), \l uuid(), \l value() and \l handle(). Descriptors are
	encapsulated by Bluetooth Low Energy characteristics and provide additional
	contextual information about the characteristic (data format, notification activation
	and so on).

	The descriptor value may be written via the \l QLowEnergyService instance
	that manages the service to which this descriptor belongs. The
	\l {QLowEnergyService::writeDescriptor()} function writes the new value.
	The \l {QLowEnergyService::descriptorWritten()} signal
	is emitted upon success. The cached \l value() of this object is updated accordingly.

	\sa QLowEnergyService, QLowEnergyCharacteristic
	*/

	struct QLowEnergyDescriptorPrivate
	{
	QLowEnergyHandle charHandle;
	QLowEnergyHandle descHandle;
	};

	/*!
	Construct a new QLowEnergyDescriptor. A default-constructed instance
	of this class is always invalid.
	*/
	QLowEnergyDescriptor::QLowEnergyDescriptor():
	d_ptr(nullptr)
	{
	}

	/*!
	Construct a new QLowEnergyDescriptor that is a copy of \a other.

	The two copies continue to share the same underlying data which does not detach
	upon write.
	*/
	QLowEnergyDescriptor::QLowEnergyDescriptor(const QLowEnergyDescriptor &other):
	d_ptr(other.d_ptr)
	{
	if (other.data) {
	data = new QLowEnergyDescriptorPrivate();
	data->charHandle = other.data->charHandle;
	data->descHandle = other.data->descHandle;
	}
	}

	/*!
	\internal

	*/
	QLowEnergyDescriptor::QLowEnergyDescriptor(QSharedPointer<QLowEnergyServicePrivate> p,
	QLowEnergyHandle charHandle,
	QLowEnergyHandle descHandle):
	d_ptr(p)
	{
	data = new QLowEnergyDescriptorPrivate();
	data->charHandle = charHandle;
	data->descHandle = descHandle;

	}

	/*!
	Destroys the QLowEnergyDescriptor object.
	*/
	QLowEnergyDescriptor::~QLowEnergyDescriptor()
	{
	delete data;
	}

	/*!
	Makes a copy of \a other and assigns it to this QLowEnergyDescriptor object.
	The two copies continue to share the same service and controller details.
	*/
	QLowEnergyDescriptor &QLowEnergyDescriptor::operator=(const QLowEnergyDescriptor &other)
	{
	d_ptr = other.d_ptr;

	if (!other.data) {
	if (data) {
	delete data;
	data = nullptr;
	}
	} else {
	if (!data)
	data = new QLowEnergyDescriptorPrivate();

	data->charHandle = other.data->charHandle;
	data->descHandle = other.data->descHandle;
	}

	return *this;
	}

	/*!
	Returns \c true if \a other is equal to this QLowEnergyCharacteristic; otherwise \c false.

	Two QLowEnergyDescriptor instances are considered to be equal if they refer to
	the same descriptor on the same remote Bluetooth Low Energy device or both
	instances have been default-constructed.
	*/
	bool QLowEnergyDescriptor::operator==(const QLowEnergyDescriptor &other) const
	{
	if (d_ptr != other.d_ptr)
	return false;

	if ((data && !other.data) \|\| (!data && other.data))
	return false;

	if (!data)
	return true;

	if (data->charHandle != other.data->charHandle
	\|\| data->descHandle != other.data->descHandle) {
	return false;
	}

	return true;
	}

	/*!
	Returns \c true if \a other is not equal to this QLowEnergyCharacteristic; otherwise \c false.

	Two QLowEnergyDescriptor instances are considered to be equal if they refer to
	the same descriptor on the same remote Bluetooth Low Energy device or both
	instances have been default-constructed.
	*/
	bool QLowEnergyDescriptor::operator!=(const QLowEnergyDescriptor &other) const
	{
	return !(*this == other);
	}

	/*!
	Returns \c true if the QLowEnergyDescriptor object is valid, otherwise returns \c false.

	An invalid descriptor instance is not associated with any service (default-constructed)
	or the associated service is no longer valid due to a disconnect from
	the underlying Bluetooth Low Energy device, for example. Once the object is invalid
	it cannot become valid anymore.

	\note If a QLowEnergyDescriptor instance turns invalid due to a disconnect
	from the underlying device, the information encapsulated by the current
	instance remains as it was at the time of the disconnect. Therefore it can be
	retrieved after the disconnect event.
	*/
	bool QLowEnergyDescriptor::isValid() const
	{
	if (d_ptr.isNull() \|\| !data)
	return false;

	if (d_ptr->state == QLowEnergyService::InvalidService)
	return false;

	return true;
	}

	/*!
	Returns the UUID of this descriptor if \l isValid() returns \c true; otherwise a
	\l {QUuid::isNull()}{null} UUID.
	*/
	QBluetoothUuid QLowEnergyDescriptor::uuid() const
	{
	if (d_ptr.isNull() \|\| !data
	\|\| !d_ptr->characteristicList.contains(data->charHandle)
	\|\| !d_ptr->characteristicList[data->charHandle].
	descriptorList.contains(data->descHandle)) {
	return QBluetoothUuid();
	}

	return d_ptr->characteristicList[data->charHandle].descriptorList[data->descHandle].uuid;
	}

	/*!
	Returns the handle of the descriptor or \c 0 if the handle
	cannot be accessed on the platform or the descriptor is invalid.

	\note On \macos and iOS handles can differ from 0, but these
	values have no special meaning outside of internal/private API.
	*/
	QLowEnergyHandle QLowEnergyDescriptor::handle() const
	{
	if (!data)
	return 0;

	return data->descHandle;
	}

	/*!
	Returns the cached value of the descriptor.

	The cached descriptor value may be updated using
	\l QLowEnergyService::writeDescriptor() or \l QLowEnergyService::readDescriptor().
	*/
	QByteArray QLowEnergyDescriptor::value() const
	{
	if (d_ptr.isNull() \|\| !data
	\|\| !d_ptr->characteristicList.contains(data->charHandle)
	\|\| !d_ptr->characteristicList[data->charHandle].
	descriptorList.contains(data->descHandle)) {
	return QByteArray();
	}

	return d_ptr->characteristicList[data->charHandle].descriptorList[data->descHandle].value;
	}

	/*!
	Returns the human-readable name of the descriptor.

	The name is based on the descriptor's \l type(). The complete list
	of descriptor types can be found under
	\l {https://developer.bluetooth.org/gatt/descriptors/Pages/DescriptorsHomePage.aspx}{Bluetooth.org Descriptors}.

	The returned string is empty if the \l type() is unknown.

	\sa type(), QBluetoothUuid::descriptorToString()
	*/

	QString QLowEnergyDescriptor::name() const
	{
	return QBluetoothUuid::descriptorToString(type());
	}

	/*!
	Returns the type of the descriptor.

	\sa name()
	*/
	QBluetoothUuid::DescriptorType QLowEnergyDescriptor::type() const
	{
	const QBluetoothUuid u = uuid();
	bool ok = false;
	quint16 shortUuid = u.toUInt16(&ok);

	if (!ok)
	return QBluetoothUuid::UnknownDescriptorType;

	switch (shortUuid) {
	case QBluetoothUuid::CharacteristicExtendedProperties:
	case QBluetoothUuid::CharacteristicUserDescription:
	case QBluetoothUuid::ClientCharacteristicConfiguration:
	case QBluetoothUuid::ServerCharacteristicConfiguration:
	case QBluetoothUuid::CharacteristicPresentationFormat:
	case QBluetoothUuid::CharacteristicAggregateFormat:
	case QBluetoothUuid::ValidRange:
	case QBluetoothUuid::ExternalReportReference:
	case QBluetoothUuid::ReportReference:
	return (QBluetoothUuid::DescriptorType) shortUuid;
	default:
	break;
	}

	return QBluetoothUuid::UnknownDescriptorType;
	}

	/*!
	\internal

	Returns the handle of the characteristic to which this descriptor belongs
	*/
	QLowEnergyHandle QLowEnergyDescriptor::characteristicHandle() const
	{
	if (d_ptr.isNull() \|\| !data)
	return 0;

	return data->charHandle;
	}

	QT_END_NAMESPACE