plugins: use nullptr instead of 0 and NULL

Change-Id: I7f3e56db1d0db178d8a7d9eb91c09e03cae89f6b
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/plugins/generic/evdevkeyboard/main.cpp

@@ -27,7 +27,8 @@ QObject* QEvdevKeyboardPlugin::create(const QString &key,
 {
     if (!key.compare(QLatin1String("EvdevKeyboard"), Qt::CaseInsensitive))
         return new QEvdevKeyboardManager(key, specification);
-    return 0;
+
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/evdevmouse/main.cpp

@@ -27,7 +27,8 @@ QObject* QEvdevMousePlugin::create(const QString &key,
 {
     if (!key.compare(QLatin1String("EvdevMouse"), Qt::CaseInsensitive))
         return new QEvdevMouseManager(key, specification);
-    return 0;
+
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/evdevtablet/main.cpp

@@ -27,7 +27,7 @@ QObject* QEvdevTabletPlugin::create(const QString &key,
     if (!key.compare(QLatin1String("EvdevTablet"), Qt::CaseInsensitive))
         return new QEvdevTabletManager(key, spec);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/evdevtouch/main.cpp

@@ -27,7 +27,7 @@ QObject* QEvdevTouchScreenPlugin::create(const QString &key,
     if (!key.compare(QLatin1String("EvdevTouch"), Qt::CaseInsensitive))
         return new QEvdevTouchManager(key, spec);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/libinput/main.cpp

@@ -20,7 +20,7 @@ QObject *QLibInputPlugin::create(const QString &key, const QString &specificatio
     if (!key.compare(QLatin1String("libinput"), Qt::CaseInsensitive))
         return new QLibInputHandler(key, specification);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/tslib/main.cpp

@@ -22,7 +22,7 @@ QObject* QTsLibPlugin::create(const QString &key,
         || !key.compare(QLatin1String("TslibRaw"), Qt::CaseInsensitive))
         return new QTsLibMouseHandler(key, specification);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/generic/tuiotouch/main.cpp

@@ -30,7 +30,7 @@ QObject* QTuioTouchPlugin::create(const QString &key,
     if (!key.compare(QLatin1String("TuioTouch"), Qt::CaseInsensitive))
         return new QTuioHandler(spec);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/networkinformation/networkmanager/qnetworkmanagerservice.h

@@ -161,7 +161,7 @@ class PropertiesDBusInterface : public QDBusAbstractInterface
 {
 public:
     PropertiesDBusInterface(const QString &service, const QString &path, const QString &interface,
-                            const QDBusConnection &connection, QObject *parent = 0)
+                            const QDBusConnection &connection, QObject *parent = nullptr)
         : QDBusAbstractInterface(service, path, interface.toLatin1().data(), connection, parent)
     {
     }

src/plugins/platforminputcontexts/ibus/main.cpp

@@ -30,7 +30,8 @@ QIBusPlatformInputContext *QIbusPlatformInputContextPlugin::create(const QString
         qDBusRegisterMetaType<QIBusText>();
         return new QIBusPlatformInputContext;
     }
-    return 0;
+
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/platforminputcontexts/ibus/qibusplatforminputcontext.cpp

@@ -468,7 +468,7 @@ void QIBusPlatformInputContext::filterEventFinished(QDBusPendingCallWatcher *cal
     if (!filtered) {
 #ifndef QT_NO_CONTEXTMENU
         if (type == QEvent::KeyPress && qtcode == Qt::Key_Menu
-            && window != NULL) {
+            && window != nullptr) {
             const QPoint globalPos = window->screen()->handle()->cursor()->pos();
             const QPoint pos = window->mapFromGlobal(globalPos);
             QWindowSystemInterfacePrivate::ContextMenuEvent contextMenuEvent(window, false, pos,
@@ -581,10 +581,10 @@ static bool shouldConnectIbusPortal()
 }
 
 QIBusPlatformInputContextPrivate::QIBusPlatformInputContextPrivate()
-    : connection(0),
-      bus(0),
-      portalBus(0),
-      context(0),
+    : connection(nullptr),
+      bus(nullptr),
+      portalBus(nullptr),
+      context(nullptr),
       usePortal(shouldConnectIbusPortal()),
       valid(false),
       busConnected(false),
@@ -721,7 +721,7 @@ QDBusConnection *QIBusPlatformInputContextPrivate::createConnection()
     QFile file(getSocketPath());
 
     if (!file.open(QFile::ReadOnly))
-        return 0;
+        return nullptr;
 
     QByteArray address;
     int pid = -1;
@@ -740,7 +740,7 @@ QDBusConnection *QIBusPlatformInputContextPrivate::createConnection()
     if (debug)
         qDebug() << "IBUS_ADDRESS=" << address << "PID=" << pid;
     if (address.isEmpty() || pid < 0 || kill(pid, 0) != 0)
-        return 0;
+        return nullptr;
 
     return new QDBusConnection(QDBusConnection::connectToBus(QString::fromLatin1(address), "QIBusProxy"_L1));
 }

src/plugins/platforms/linuxfb/main.cpp

@@ -22,7 +22,7 @@ QPlatformIntegration* QLinuxFbIntegrationPlugin::create(const QString& system, c
     if (!system.compare("linuxfb"_L1, Qt::CaseInsensitive))
         return new QLinuxFbIntegration(paramList);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/linuxfb/qlinuxfbdrmscreen.cpp

@@ -243,7 +243,7 @@ bool QLinuxFbDevice::createFramebuffer(QLinuxFbDevice::Output *output, int buffe
         qErrnoWarning(errno, "Failed to map dumb buffer");
         return false;
     }
-    fb.p = mmap(0, fb.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd(), mreq.offset);
+    fb.p = mmap(nullptr, fb.size, PROT_READ | PROT_WRITE, MAP_SHARED, fd(), mreq.offset);
     if (fb.p == MAP_FAILED) {
         qErrnoWarning(errno, "Failed to mmap dumb buffer");
         return false;

src/plugins/platforms/linuxfb/qlinuxfbintegration.cpp

@@ -42,7 +42,7 @@ QLinuxFbIntegration::QLinuxFbIntegration(const QStringList &paramList)
     : m_primaryScreen(nullptr),
       m_fontDb(new QGenericUnixFontDatabase),
       m_services(new QGenericUnixServices),
-      m_kbdMgr(0)
+      m_kbdMgr(nullptr)
 {
 #if QT_CONFIG(kms)
     if (qEnvironmentVariableIntValue("QT_QPA_FB_DRM") != 0)
@@ -147,7 +147,7 @@ QPlatformNativeInterface *QLinuxFbIntegration::nativeInterface() const
 QFunctionPointer QLinuxFbIntegration::platformFunction(const QByteArray &function) const
 {
     Q_UNUSED(function);
-    return 0;
+    return nullptr;
 }
 
 #if QT_CONFIG(evdev)

src/plugins/platforms/linuxfb/qlinuxfbscreen.cpp

@@ -213,7 +213,7 @@ static QImage::Format determineFormat(const fb_var_screeninfo &info, int depth)
 
 static int openTtyDevice(const QString &device)
 {
-    const char *const devs[] = { "/dev/tty0", "/dev/tty", "/dev/console", 0 };
+    const char *const devs[] = { "/dev/tty0", "/dev/tty", "/dev/console", nullptr };
 
     int fd = -1;
     if (device.isEmpty()) {
@@ -253,9 +253,9 @@ static void blankScreen(int fd, bool on)
 }
 
 QLinuxFbScreen::QLinuxFbScreen(const QStringList &args)
-    : mArgs(args), mFbFd(-1), mTtyFd(-1), mBlitter(0)
+    : mArgs(args), mFbFd(-1), mTtyFd(-1), mBlitter(nullptr)
 {
-    mMmap.data = 0;
+    mMmap.data = nullptr;
 }
 
 QLinuxFbScreen::~QLinuxFbScreen()
@@ -344,7 +344,7 @@ bool QLinuxFbScreen::initialize()
 
     // mmap the framebuffer
     mMmap.size = finfo.smem_len;
-    uchar *data = (unsigned char *)mmap(0, mMmap.size, PROT_READ | PROT_WRITE, MAP_SHARED, mFbFd, 0);
+    uchar *data = (unsigned char *)mmap(nullptr, mMmap.size, PROT_READ | PROT_WRITE, MAP_SHARED, mFbFd, 0);
     if ((long)data == -1) {
         qErrnoWarning(errno, "Failed to mmap framebuffer");
         return false;

src/plugins/platforms/minimal/main.cpp

@@ -22,7 +22,7 @@ QPlatformIntegration *QMinimalIntegrationPlugin::create(const QString& system, c
     if (!system.compare("minimal"_L1, Qt::CaseInsensitive))
         return new QMinimalIntegration(paramList);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/minimal/qminimalintegration.cpp

@@ -58,7 +58,7 @@ static inline unsigned parseOptions(const QStringList &paramList)
 }
 
 QMinimalIntegration::QMinimalIntegration(const QStringList &parameters)
-    : m_fontDatabase(0)
+    : m_fontDatabase(nullptr)
     , m_options(parseOptions(parameters))
 {
     if (qEnvironmentVariableIsSet(debugBackingStoreEnvironmentVariable)

src/plugins/platforms/minimalegl/main.cpp

@@ -22,7 +22,7 @@ QPlatformIntegration* QMinimalEglIntegrationPlugin::create(const QString& system
     if (!system.compare("minimalegl"_L1, Qt::CaseInsensitive))
         return new QMinimalEglIntegration;
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/minimalegl/qminimaleglbackingstore.cpp

@@ -11,7 +11,7 @@ QT_BEGIN_NAMESPACE
 QMinimalEglBackingStore::QMinimalEglBackingStore(QWindow *window)
     : QPlatformBackingStore(window)
     , m_context(new QOpenGLContext)
-    , m_device(0)
+    , m_device(nullptr)
 {
     m_context->setFormat(window->requestedFormat());
     m_context->setScreen(window->screen());

src/plugins/platforms/minimalegl/qminimaleglscreen.cpp

@@ -41,8 +41,8 @@ public:
 QMinimalEglScreen::QMinimalEglScreen(EGLNativeDisplayType display)
     : m_depth(32)
     , m_format(QImage::Format_Invalid)
-    , m_platformContext(0)
-    , m_surface(0)
+    , m_platformContext(nullptr)
+    , m_surface(nullptr)
 {
 #ifdef QEGL_EXTRA_DEBUG
     qWarning("QEglScreen %p\n", this);
@@ -123,7 +123,7 @@ void QMinimalEglScreen::createAndSetPlatformContext()
     q_printEglConfig(m_dpy, config);
 #endif
 
-    m_surface = eglCreateWindowSurface(m_dpy, config, eglWindow, NULL);
+    m_surface = eglCreateWindowSurface(m_dpy, config, eglWindow, nullptr);
     if (Q_UNLIKELY(m_surface == EGL_NO_SURFACE)) {
         qWarning("Could not create the egl surface: error = 0x%x\n", eglGetError());
         eglTerminate(m_dpy);
@@ -132,7 +132,7 @@ void QMinimalEglScreen::createAndSetPlatformContext()
     //    qWarning("Created surface %dx%d\n", w, h);
 
 #ifndef QT_NO_OPENGL
-    QEGLPlatformContext *platformContext = new QMinimalEglContext(platformFormat, 0, m_dpy);
+    QEGLPlatformContext *platformContext = new QMinimalEglContext(platformFormat, nullptr, m_dpy);
     m_platformContext = platformContext;
 #endif
     EGLint w,h;                    // screen size detection

src/plugins/platforms/offscreen/qoffscreencommon.cpp

@@ -189,7 +189,7 @@ QPixmap QOffscreenBackingStore::grabWindow(WId window, const QRect &rect) const
 
 QOffscreenBackingStore *QOffscreenBackingStore::backingStoreForWinId(WId id)
 {
-    return m_backingStoreForWinIdHash.value(id, 0);
+    return m_backingStoreForWinIdHash.value(id, nullptr);
 }
 
 void QOffscreenBackingStore::clearHash()

src/plugins/platforms/offscreen/qoffscreenwindow.cpp

@@ -165,7 +165,7 @@ void QOffscreenWindow::setWindowState(Qt::WindowStates state)
 
 QOffscreenWindow *QOffscreenWindow::windowForWinId(WId id)
 {
-    return m_windowForWinIdHash.value(id, 0);
+    return m_windowForWinIdHash.value(id, nullptr);
 }
 
 Q_CONSTINIT QHash<WId, QOffscreenWindow *> QOffscreenWindow::m_windowForWinIdHash;

src/plugins/platforms/vkkhrdisplay/main.cpp

@@ -21,7 +21,7 @@ QPlatformIntegration *QVkKhrDisplayIntegrationPlugin::create(const QString &syst
     if (!system.compare("vkkhrdisplay"_L1, Qt::CaseInsensitive))
         return new QVkKhrDisplayIntegration(paramList);
 
-    return 0;
+    return nullptr;
 }
 
 QT_END_NAMESPACE

src/plugins/platforms/xcb/qxcbconnection.cpp

@@ -141,12 +141,12 @@ void QXcbConnection::removeWindowEventListener(xcb_window_t id)
 
 QXcbWindowEventListener *QXcbConnection::windowEventListenerFromId(xcb_window_t id)
 {
-    return m_mapper.value(id, 0);
+    return m_mapper.value(id, nullptr);
 }
 
 QXcbWindow *QXcbConnection::platformWindowFromId(xcb_window_t id)
 {
-    QXcbWindowEventListener *listener = m_mapper.value(id, 0);
+    QXcbWindowEventListener *listener = m_mapper.value(id, nullptr);
     if (listener)
         return listener->toWindow();
     return nullptr;

src/plugins/sqldrivers/sqlite/qsql_sqlite.cpp

@@ -158,7 +158,7 @@ void QSQLiteResultPrivate::finalize()
         return;
 
     sqlite3_finalize(stmt);
-    stmt = 0;
+    stmt = nullptr;
 }
 
 void QSQLiteResultPrivate::initColumns(bool emptyResultset)
@@ -765,7 +765,7 @@ bool QSQLiteDriver::open(const QString & db, const QString &, const QString &, c
 
         if (d->access) {
             sqlite3_close(d->access);
-            d->access = 0;
+            d->access = nullptr;
         }
 
         return false;
@@ -788,7 +788,7 @@ void QSQLiteDriver::close()
 
         if (res != SQLITE_OK)
             setLastError(qMakeError(d->access, tr("Error closing database"), QSqlError::ConnectionError, res));
-        d->access = 0;
+        d->access = nullptr;
         setOpen(false);
         setOpenError(false);
     }

src/plugins/sqldrivers/sqlite/smain.cpp

@@ -31,7 +31,8 @@ QSqlDriver* QSQLiteDriverPlugin::create(const QString &name)
         QSQLiteDriver* driver = new QSQLiteDriver();
         return driver;
     }
-    return 0;
+
+    return nullptr;
 }
 
 QT_END_NAMESPACE