loplugin:nullptr (automatic rewrite)

Change-Id: Ife1eef04d905f12308b64b971176c2f045a1b268

35 files changed, 315 insertions, 315 deletions

diff --git a/starmath/inc/ElementsDockingWindow.hxx b/starmath/inc/ElementsDockingWindow.hxx
index 41ec150cadd6..e57e50c73eae 100644
--- a/starmath/inc/ElementsDockingWindow.hxx
+++ b/starmath/inc/ElementsDockingWindow.hxx
@@ -108,7 +108,7 @@ class SmElementsControl : public Control
 
     //if pContext is not NULL, then draw, otherwise
     //just layout
-    void LayoutOrPaintContents(vcl::RenderContext *pContext = NULL);
+    void LayoutOrPaintContents(vcl::RenderContext *pContext = nullptr);
 
 public:
     SmElementsControl(vcl::Window *pParent);
diff --git a/starmath/inc/caret.hxx b/starmath/inc/caret.hxx
index d7f7b9efa3bb..bb1fc840d385 100644
--- a/starmath/inc/caret.hxx
+++ b/starmath/inc/caret.hxx
@@ -17,7 +17,7 @@
 
 /** Representation of caret position with an equation */
 struct SmCaretPos{
-    SmCaretPos(SmNode* selectedNode = NULL, int iIndex = 0) {
+    SmCaretPos(SmNode* selectedNode = nullptr, int iIndex = 0) {
         pSelectedNode = selectedNode;
         Index = iIndex;
     }
@@ -35,7 +35,7 @@ struct SmCaretPos{
     //TODO: Consider forgetting about the todo above... As it's really unpleasant.
     int Index;
     /** True, if this is a valid caret position */
-    bool IsValid() const { return pSelectedNode != NULL; }
+    bool IsValid() const { return pSelectedNode != nullptr; }
     bool operator!=(SmCaretPos pos) const {
         return pos.pSelectedNode != pSelectedNode || Index != pos.Index;
     }
@@ -100,8 +100,8 @@ private:
 /** An entry in SmCaretPosGraph */
 struct SmCaretPosGraphEntry{
     SmCaretPosGraphEntry(SmCaretPos pos = SmCaretPos(),
-                       SmCaretPosGraphEntry* left = NULL,
-                       SmCaretPosGraphEntry* right = NULL){
+                       SmCaretPosGraphEntry* left = nullptr,
+                       SmCaretPosGraphEntry* right = nullptr){
         CaretPos = pos;
         Left = left;
         Right = right;
@@ -128,7 +128,7 @@ public:
     SmCaretPosGraphIterator(SmCaretPosGraph* graph){
         pGraph = graph;
         nOffset = 0;
-        pEntry = NULL;
+        pEntry = nullptr;
     }
     /** Get the next entry, NULL if none */
     SmCaretPosGraphEntry* Next();
@@ -156,7 +156,7 @@ private:
 class SmCaretPosGraph{
 public:
     SmCaretPosGraph(){
-        pNext = NULL;
+        pNext = nullptr;
         nOffset = 0;
     }
     ~SmCaretPosGraph();
@@ -168,8 +168,8 @@ public:
      *  @remarks If left and/or right are set NULL, they will point back to the entry.
      */
     SmCaretPosGraphEntry* Add(SmCaretPos pos,
-                            SmCaretPosGraphEntry* left = NULL,
-                            SmCaretPosGraphEntry* right = NULL){
+                            SmCaretPosGraphEntry* left = nullptr,
+                            SmCaretPosGraphEntry* right = nullptr){
         SAL_WARN_IF( pos.Index < 0, "starmath", "Index shouldn't be -1!" );
         return Add(SmCaretPosGraphEntry(pos, left, right));
     }
diff --git a/starmath/inc/cursor.hxx b/starmath/inc/cursor.hxx
index 298882839b11..9de6b5309d57 100644
--- a/starmath/inc/cursor.hxx
+++ b/starmath/inc/cursor.hxx
@@ -215,7 +215,7 @@ public:
     /** Draw the caret */
     void Draw(OutputDevice& pDev, Point Offset, bool isCaretVisible);
 
-    bool IsAtTailOfBracket(SmBracketType eBracketType, SmBraceNode** ppBraceNode = NULL) const;
+    bool IsAtTailOfBracket(SmBracketType eBracketType, SmBraceNode** ppBraceNode = nullptr) const;
     void MoveAfterBracket(SmBraceNode* pBraceNode, bool bMoveAnchor = true);
 
 private:
@@ -269,9 +269,9 @@ private:
         if(rpNode && rpNode->GetParent()){    //Don't remove this, correctness relies on it
             int index = rpNode->GetParent()->IndexOfSubNode(rpNode);
             if(index != -1)
-                rpNode->GetParent()->SetSubNode(index, NULL);
+                rpNode->GetParent()->SetSubNode(index, nullptr);
         }
-        rpNode = NULL;
+        rpNode = nullptr;
         //Create line from node
         if(pNode && IsLineCompositionNode(pNode))
             return LineToList(static_cast<SmStructureNode*>(pNode), pList);
@@ -308,7 +308,7 @@ private:
      * Call this method with NULL to reset the clipboard
      * @remarks: This method takes ownership of pList.
      */
-    void SetClipboard(SmNodeList* pList = NULL);
+    void SetClipboard(SmNodeList* pList = nullptr);
 
     /** Clone list of nodes (creates a deep clone) */
     static SmNodeList* CloneList(SmNodeList* pList);
@@ -350,7 +350,7 @@ private:
      * @returns An iterator pointing to the element following the selection taken.
      */
     static SmNodeList::iterator TakeSelectedNodesFromList(SmNodeList *pLineList,
-                                                         SmNodeList *pSelectedNodes = NULL);
+                                                         SmNodeList *pSelectedNodes = nullptr);
 
     /** Create an instance of SmMathSymbolNode usable for brackets */
     static SmNode *CreateBracket(SmBracketType eBracketType, bool bIsLeft);
@@ -384,7 +384,7 @@ private:
                     SmStructureNode* pParent,
                     int nParentIndex,
                     SmCaretPos PosAfterEdit,
-                    SmNode* pStartLine = NULL);
+                    SmNode* pStartLine = nullptr);
     /** Request the formula is repainted */
     void RequestRepaint();
 };
@@ -411,7 +411,7 @@ class SmNodeListParser{
 public:
     /** Create an instance of SmNodeListParser */
     SmNodeListParser(){
-        pList = NULL;
+        pList = nullptr;
     }
     /** Parse a list of nodes to an expression
      *
@@ -436,7 +436,7 @@ private:
     SmNode* Terminal(){
         if(pList->size() > 0)
             return pList->front();
-        return NULL;
+        return nullptr;
     }
     /** Move to next terminal */
     SmNode* Next(){
diff --git a/starmath/inc/document.hxx b/starmath/inc/document.hxx
index a76538efda06..b26b3e9a45c6 100644
--- a/starmath/inc/document.hxx
+++ b/starmath/inc/document.hxx
@@ -220,7 +220,7 @@ public:
     /** True, if cursor have previously been requested and thus
      * has some sort of position.
      */
-    bool        HasCursor() { return pCursor != NULL; }
+    bool        HasCursor() { return pCursor != nullptr; }
 };
 
 #endif
diff --git a/starmath/inc/node.hxx b/starmath/inc/node.hxx
index c7f71ba99554..f07687ac05f5 100644
--- a/starmath/inc/node.hxx
+++ b/starmath/inc/node.hxx
@@ -250,21 +250,21 @@ public:
         pNode = node;
         nSize = pNode->GetNumSubNodes();
         nIndex = 0;
-        pChildNode = NULL;
+        pChildNode = nullptr;
         bIsReverse = bReverse;
     }
     /** Get the subnode or NULL if none */
     SmNode* Next(){
         while(!bIsReverse && nIndex < nSize){
-            if(NULL != (pChildNode = pNode->GetSubNode(nIndex++)))
+            if(nullptr != (pChildNode = pNode->GetSubNode(nIndex++)))
                 return pChildNode;
         }
         while(bIsReverse && nSize > 0){
-            if(NULL != (pChildNode = pNode->GetSubNode((nSize--)-1)))
+            if(nullptr != (pChildNode = pNode->GetSubNode((nSize--)-1)))
                 return pChildNode;
         }
-        pChildNode = NULL;
-        return NULL;
+        pChildNode = nullptr;
+        return nullptr;
     }
     /** Get the current child node, NULL if none */
     SmNode* Current(){
@@ -314,7 +314,7 @@ public:
 
     using   SmNode::GetSubNode;
     virtual SmNode *    GetSubNode(sal_uInt16 nIndex) override;
-            void SetSubNodes(SmNode *pFirst, SmNode *pSecond, SmNode *pThird = NULL);
+            void SetSubNodes(SmNode *pFirst, SmNode *pSecond, SmNode *pThird = nullptr);
             void SetSubNodes(const SmNodeArray &rNodeArray);
 
     SmStructureNode & operator = ( const SmStructureNode &rNode );
@@ -330,7 +330,7 @@ public:
             aSubNodes.resize(nIndex + 1);
             //Set new slots to NULL
             for (size_t i = size; i < nIndex+1; i++)
-                aSubNodes[i] = NULL;
+                aSubNodes[i] = nullptr;
         }
         aSubNodes[nIndex] = pNode;
         ClaimPaternity();
diff --git a/starmath/inc/unomodel.hxx b/starmath/inc/unomodel.hxx
index 2227e20639a8..6b6ac0779f69 100644
--- a/starmath/inc/unomodel.hxx
+++ b/starmath/inc/unomodel.hxx
@@ -62,7 +62,7 @@ protected:
     virtual void _getPropertyValues( const comphelper::PropertyMapEntry** ppEntries, css::uno::Any* pValue )
         throw (css::uno::RuntimeException, css::beans::UnknownPropertyException, css::lang::WrappedTargetException, std::exception) override;
 public:
-    SmModel( SfxObjectShell *pObjSh = 0 );
+    SmModel( SfxObjectShell *pObjSh = nullptr );
     virtual ~SmModel() throw ();
 
     //XInterface
diff --git a/starmath/inc/visitors.hxx b/starmath/inc/visitors.hxx
index 2a7bc4b6121c..9fb287374bde 100644
--- a/starmath/inc/visitors.hxx
+++ b/starmath/inc/visitors.hxx
@@ -340,7 +340,7 @@ private:
 class SmCloningVisitor : public SmVisitor
 {
 public:
-    SmCloningVisitor( ){ pResult = NULL; }
+    SmCloningVisitor( ){ pResult = nullptr; }
     virtual ~SmCloningVisitor() {}
     void Visit( SmTableNode* pNode ) override;
     void Visit( SmBraceNode* pNode ) override;
diff --git a/starmath/source/ElementsDockingWindow.cxx b/starmath/source/ElementsDockingWindow.cxx
index 17735bf9e8c6..d3dd525a43d3 100644
--- a/starmath/source/ElementsDockingWindow.cxx
+++ b/starmath/source/ElementsDockingWindow.cxx
@@ -221,7 +221,7 @@ SmElementsControl::SmElementsControl(vcl::Window *pParent)
     : Control(pParent, WB_TABSTOP)
     , mpDocShell(new SmDocShell(SfxModelFlags::EMBEDDED_OBJECT))
     , maCurrentSetId(0)
-    , mpCurrentElement(NULL)
+    , mpCurrentElement(nullptr)
     , mbVerticalMode(true)
     , mxScroll(VclPtr<ScrollBar>::Create(this, WB_VERT))
 {
@@ -390,7 +390,7 @@ void SmElementsControl::Paint(vcl::RenderContext& rRenderContext, const Rectangl
 
 void SmElementsControl::MouseMove( const MouseEvent& rMouseEvent )
 {
-    mpCurrentElement = NULL;
+    mpCurrentElement = nullptr;
     OUString tooltip;
     if (Rectangle(Point(0, 0), GetOutputSizePixel()).IsInside(rMouseEvent.GetPosPixel()))
     {
diff --git a/starmath/source/accessibility.cxx b/starmath/source/accessibility.cxx
index 034b67e2155e..2e81b188d5e7 100644
--- a/starmath/source/accessibility.cxx
+++ b/starmath/source/accessibility.cxx
@@ -77,7 +77,7 @@ static awt::Rectangle lcl_GetBounds( vcl::Window *pWin )
     awt::Rectangle aBounds;
     if (pWin)
     {
-        Rectangle aRect = pWin->GetWindowExtentsRelative( NULL );
+        Rectangle aRect = pWin->GetWindowExtentsRelative( nullptr );
         aBounds.X       = aRect.Left();
         aBounds.Y       = aRect.Top();
         aBounds.Width   = aRect.GetWidth();
@@ -85,7 +85,7 @@ static awt::Rectangle lcl_GetBounds( vcl::Window *pWin )
         vcl::Window* pParent = pWin->GetAccessibleParentWindow();
         if (pParent)
         {
-            Rectangle aParentRect = pParent->GetWindowExtentsRelative( NULL );
+            Rectangle aParentRect = pParent->GetWindowExtentsRelative( nullptr );
             awt::Point aParentScreenLoc( aParentRect.Left(), aParentRect.Top() );
             aBounds.X -= aParentScreenLoc.X;
             aBounds.Y -= aParentScreenLoc.Y;
@@ -101,7 +101,7 @@ static awt::Point lcl_GetLocationOnScreen( vcl::Window *pWin )
     awt::Point aPos;
     if (pWin)
     {
-        Rectangle aRect = pWin->GetWindowExtentsRelative( NULL );
+        Rectangle aRect = pWin->GetWindowExtentsRelative( nullptr );
         aPos.X = aRect.Left();
         aPos.Y = aRect.Top();
     }
@@ -125,8 +125,8 @@ SmGraphicAccessible::~SmGraphicAccessible()
 
 SmDocShell * SmGraphicAccessible::GetDoc_Impl()
 {
-    SmViewShell *pView = pWin ? pWin->GetView() : 0;
-    return pView ? pView->GetDoc() : 0;
+    SmViewShell *pView = pWin ? pWin->GetView() : nullptr;
+    return pView ? pView->GetDoc() : nullptr;
 }
 
 OUString SmGraphicAccessible::GetAccessibleText_Impl()
@@ -140,7 +140,7 @@ OUString SmGraphicAccessible::GetAccessibleText_Impl()
 
 void SmGraphicAccessible::ClearWin()
 {
-    pWin = 0;   // implicitly results in AccessibleStateType::DEFUNC set
+    pWin = nullptr;   // implicitly results in AccessibleStateType::DEFUNC set
 
     if ( nClientId )
     {
@@ -192,7 +192,7 @@ uno::Reference< XAccessible > SAL_CALL SmGraphicAccessible::getAccessibleAtPoint
     throw (RuntimeException, std::exception)
 {
     SolarMutexGuard aGuard;
-    XAccessible *pRes = 0;
+    XAccessible *pRes = nullptr;
     if (containsPoint( aPoint ))
         pRes = this;
     return pRes;
@@ -318,7 +318,7 @@ sal_Int32 SAL_CALL SmGraphicAccessible::getAccessibleIndexInParent()
 {
     SolarMutexGuard aGuard;
     sal_Int32 nIdx = -1;
-    vcl::Window *pAccParent = pWin ? pWin->GetAccessibleParentWindow() : 0;
+    vcl::Window *pAccParent = pWin ? pWin->GetAccessibleParentWindow() : nullptr;
     if (pAccParent)
     {
         sal_uInt16 nCnt = pAccParent->GetAccessibleChildWindowCount();
@@ -487,7 +487,7 @@ awt::Rectangle SAL_CALL SmGraphicAccessible::getCharacterBounds( sal_Int32 nInde
     {
         // get accessible text
         SmViewShell *pView = pWin->GetView();
-        SmDocShell  *pDoc  = pView ? pView->GetDoc() : 0;
+        SmDocShell  *pDoc  = pView ? pView->GetDoc() : nullptr;
         if (!pDoc)
             throw RuntimeException();
         OUString aTxt( GetAccessibleText_Impl() );
@@ -572,7 +572,7 @@ sal_Int32 SAL_CALL SmGraphicAccessible::getIndexAtPoint( const awt::Point& aPoin
         aPos -= pWin->GetFormulaDrawPos();
 
         // if it was inside the formula then get the appropriate node
-        const SmNode *pNode = 0;
+        const SmNode *pNode = nullptr;
         if (pTree->OrientedDist(aPos) <= 0)
             pNode = pTree->FindRectClosestTo(aPos);
 
@@ -757,7 +757,7 @@ sal_Bool SAL_CALL SmGraphicAccessible::copyText(
 
             vcl::unohelper::TextDataObject* pDataObj = new vcl::unohelper::TextDataObject( sText );
             SolarMutexReleaser aReleaser;
-            xClipboard->setContents( pDataObj, NULL );
+            xClipboard->setContents( pDataObj, nullptr );
 
             Reference< datatransfer::clipboard::XFlushableClipboard > xFlushableClipboard( xClipboard, uno::UNO_QUERY );
             if( xFlushableClipboard.is() )
@@ -861,13 +861,13 @@ SmViewForwarder::~SmViewForwarder()
 
 bool SmViewForwarder::IsValid() const
 {
-    return rEditAcc.GetEditView() != 0;
+    return rEditAcc.GetEditView() != nullptr;
 }
 
 Rectangle SmViewForwarder::GetVisArea() const
 {
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev && pEditView)
     {
@@ -893,7 +893,7 @@ Rectangle SmViewForwarder::GetVisArea() const
 Point SmViewForwarder::LogicToPixel( const Point& rPoint, const MapMode& rMapMode ) const
 {
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev )
     {
@@ -910,7 +910,7 @@ Point SmViewForwarder::LogicToPixel( const Point& rPoint, const MapMode& rMapMod
 Point SmViewForwarder::PixelToLogic( const Point& rPoint, const MapMode& rMapMode ) const
 {
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev )
     {
@@ -1033,7 +1033,7 @@ void SmTextForwarder::SetParaAttribs( sal_Int32 nPara, const SfxItemSet& rSet )
 SfxItemPool* SmTextForwarder::GetPool() const
 {
     EditEngine *pEditEngine = rEditAcc.GetEditEngine();
-    return pEditEngine ? pEditEngine->GetEmptyItemSet().GetPool() : 0;
+    return pEditEngine ? pEditEngine->GetEmptyItemSet().GetPool() : nullptr;
 }
 
 void SmTextForwarder::RemoveAttribs( const ESelection& rSelection, bool bRemoveParaAttribs, sal_uInt16 nWhich )
@@ -1100,7 +1100,7 @@ static SfxItemState GetSvxEditEngineItemState( EditEngine& rEditEngine, const ES
 {
     std::vector<EECharAttrib> aAttribs;
 
-    const SfxPoolItem*  pLastItem = NULL;
+    const SfxPoolItem*  pLastItem = nullptr;
 
     SfxItemState eState = SfxItemState::DEFAULT;
 
@@ -1126,7 +1126,7 @@ static SfxItemState GetSvxEditEngineItemState( EditEngine& rEditEngine, const ES
         bool bGaps  = false;    // we found items but theire gaps between them
         sal_Int32 nLastEnd = nPos;
 
-        const SfxPoolItem* pParaItem = NULL;
+        const SfxPoolItem* pParaItem = nullptr;
 
         for(std::vector<EECharAttrib>::const_iterator i = aAttribs.begin(); i < aAttribs.end(); ++i)
         {
@@ -1175,7 +1175,7 @@ static SfxItemState GetSvxEditEngineItemState( EditEngine& rEditEngine, const ES
         // if we already found an item check if we found the same
         if( pLastItem )
         {
-            if( (pParaItem == NULL) || (*pLastItem != *pParaItem) )
+            if( (pParaItem == nullptr) || (*pLastItem != *pParaItem) )
                 return SfxItemState::DONTCARE;
         }
         else
@@ -1281,7 +1281,7 @@ MapMode SmTextForwarder::GetMapMode() const
 OutputDevice* SmTextForwarder::GetRefDevice() const
 {
     EditEngine *pEditEngine = rEditAcc.GetEditEngine();
-    return pEditEngine ? pEditEngine->GetRefDevice() : 0;
+    return pEditEngine ? pEditEngine->GetRefDevice() : nullptr;
 }
 
 bool SmTextForwarder::GetIndexAtPoint( const Point& rPos, sal_Int32& nPara, sal_Int32& nIndex ) const
@@ -1405,7 +1405,7 @@ bool SmTextForwarder::InsertText( const OUString& rStr, const ESelection& rSelec
 
 const SfxItemSet*   SmTextForwarder::GetEmptyItemSetPtr()
 {
-    const SfxItemSet *pItemSet = 0;
+    const SfxItemSet *pItemSet = nullptr;
     EditEngine *pEditEngine = rEditAcc.GetEditEngine();
     if (pEditEngine)
     {
@@ -1471,7 +1471,7 @@ SmEditViewForwarder::~SmEditViewForwarder()
 
 bool SmEditViewForwarder::IsValid() const
 {
-    return rEditAcc.GetEditView() != 0;
+    return rEditAcc.GetEditView() != nullptr;
 }
 
 Rectangle SmEditViewForwarder::GetVisArea() const
@@ -1479,7 +1479,7 @@ Rectangle SmEditViewForwarder::GetVisArea() const
     Rectangle aRect(0,0,0,0);
 
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev && pEditView)
     {
@@ -1505,7 +1505,7 @@ Rectangle SmEditViewForwarder::GetVisArea() const
 Point SmEditViewForwarder::LogicToPixel( const Point& rPoint, const MapMode& rMapMode ) const
 {
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev )
     {
@@ -1522,7 +1522,7 @@ Point SmEditViewForwarder::LogicToPixel( const Point& rPoint, const MapMode& rMa
 Point SmEditViewForwarder::PixelToLogic( const Point& rPoint, const MapMode& rMapMode ) const
 {
     EditView *pEditView = rEditAcc.GetEditView();
-    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : 0;
+    OutputDevice* pOutDev = pEditView ? pEditView->GetWindow() : nullptr;
 
     if( pOutDev )
     {
@@ -1601,7 +1601,7 @@ bool SmEditViewForwarder::Paste()
 
 SmEditAccessible::SmEditAccessible( SmEditWindow *pEditWin ) :
     aAccName            (SM_RESSTR(STR_CMDBOXWINDOW)),
-    pTextHelper         (0),
+    pTextHelper         (nullptr),
     pWin                (pEditWin)
 {
     OSL_ENSURE( pWin, "SmEditAccessible: window missing" );
@@ -1637,14 +1637,14 @@ void SmEditAccessible::ClearWin()
     if (pEditEngine)
         pEditEngine->SetNotifyHdl( Link<EENotify&,void>() );
 
-    pWin = 0;   // implicitly results in AccessibleStateType::DEFUNC set
+    pWin = nullptr;   // implicitly results in AccessibleStateType::DEFUNC set
 
     //! make TextHelper implicitly release C++ references to some core objects
     pTextHelper->SetEditSource( ::std::unique_ptr<SvxEditSource>() );
     //! make TextHelper release references
     //! (e.g. the one set by the 'SetEventSource' call)
     pTextHelper->Dispose();
-    delete pTextHelper;     pTextHelper = 0;
+    delete pTextHelper;     pTextHelper = nullptr;
 }
 
 // XAccessible
@@ -1804,7 +1804,7 @@ sal_Int32 SAL_CALL SmEditAccessible::getAccessibleIndexInParent(  )
 {
     SolarMutexGuard aGuard;
     sal_Int32 nIdx = -1;
-    vcl::Window *pAccParent = pWin ? pWin->GetAccessibleParentWindow() : 0;
+    vcl::Window *pAccParent = pWin ? pWin->GetAccessibleParentWindow() : nullptr;
     if (pAccParent)
     {
         sal_uInt16 nCnt = pAccParent->GetAccessibleChildWindowCount();
diff --git a/starmath/source/accessibility.hxx b/starmath/source/accessibility.hxx
index 103989cbfadd..c4cd3c32177b 100644
--- a/starmath/source/accessibility.hxx
+++ b/starmath/source/accessibility.hxx
@@ -331,8 +331,8 @@ public:
 
     //! access EditEngine and EditView via the functions in the respective window
     //! pointers may be 0 (e.g. during reload)
-    EditEngine * GetEditEngine()    { return pWin ? pWin->GetEditEngine() : 0; }
-    EditView   * GetEditView()      { return pWin ? pWin->GetEditView() : 0; }
+    EditEngine * GetEditEngine()    { return pWin ? pWin->GetEditEngine() : nullptr; }
+    EditView   * GetEditView()      { return pWin ? pWin->GetEditView() : nullptr; }
 
     // XAccessible
     virtual css::uno::Reference< css::accessibility::XAccessibleContext > SAL_CALL getAccessibleContext(  ) throw (css::uno::RuntimeException, std::exception) override;
diff --git a/starmath/source/caret.cxx b/starmath/source/caret.cxx
index 25b4f843382d..5801fea30e6a 100644
--- a/starmath/source/caret.cxx
+++ b/starmath/source/caret.cxx
@@ -17,7 +17,7 @@ SmCaretPosGraphEntry* SmCaretPosGraphIterator::Next(){
             nOffset = 0;
             pEntry = Next();
         }else
-            pEntry = NULL;
+            pEntry = nullptr;
     }else
         pEntry = pGraph->Graph + nOffset++;
     return pEntry;
@@ -40,7 +40,7 @@ SmCaretPosGraphEntry* SmCaretPosGraph::Add(SmCaretPosGraphEntry entry){
 
 SmCaretPosGraph::~SmCaretPosGraph(){
     delete pNext;
-    pNext = NULL;
+    pNext = nullptr;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/source/cfgitem.cxx b/starmath/source/cfgitem.cxx
index 2272437cd698..858479d6cd1f 100644
--- a/starmath/source/cfgitem.cxx
+++ b/starmath/source/cfgitem.cxx
@@ -249,7 +249,7 @@ void SmFontFormatList::RemoveFontFormat( const OUString &rFntFmtId )
 
 const SmFontFormat * SmFontFormatList::GetFontFormat( const OUString &rFntFmtId ) const
 {
-    const SmFontFormat *pRes = 0;
+    const SmFontFormat *pRes = nullptr;
 
     for (size_t i = 0;  i < aEntries.size();  ++i)
     {
@@ -267,7 +267,7 @@ const SmFontFormat * SmFontFormatList::GetFontFormat( const OUString &rFntFmtId
 
 const SmFontFormat * SmFontFormatList::GetFontFormat( size_t nPos ) const
 {
-    const SmFontFormat *pRes = 0;
+    const SmFontFormat *pRes = nullptr;
     if (nPos < aEntries.size())
         pRes = &aEntries[nPos].aFntFmt;
     return pRes;
@@ -586,7 +586,7 @@ void SmMathConfig::LoadFontFormatList()
         ReadFontFormat( aFntFmt, pNode[i], FONT_FORMAT_LIST );
         if (!pFontFormatList->GetFontFormat( pNode[i] ))
         {
-            OSL_ENSURE( 0 == pFontFormatList->GetFontFormat( pNode[i] ),
+            OSL_ENSURE( nullptr == pFontFormatList->GetFontFormat( pNode[i] ),
                     "FontFormat ID already exists" );
             pFontFormatList->AddFontFormat( pNode[i], aFntFmt );
         }
@@ -1144,7 +1144,7 @@ void SmMathConfig::Notify( const css::uno::Sequence< OUString >& )
 
 void SmMathConfig::ItemSetToConfig(const SfxItemSet &rSet)
 {
-    const SfxPoolItem *pItem     = NULL;
+    const SfxPoolItem *pItem     = nullptr;
 
     sal_uInt16 nU16;
     bool bVal;
diff --git a/starmath/source/cursor.cxx b/starmath/source/cursor.cxx
index 954563ec88d0..8efa9315ea79 100644
--- a/starmath/source/cursor.cxx
+++ b/starmath/source/cursor.cxx
@@ -14,7 +14,7 @@
 #include <comphelper/string.hxx>
 
 void SmCursor::Move(OutputDevice* pDev, SmMovementDirection direction, bool bMoveAnchor){
-    SmCaretPosGraphEntry* NewPos = NULL;
+    SmCaretPosGraphEntry* NewPos = nullptr;
     switch(direction){
         case MoveLeft:
         {
@@ -76,7 +76,7 @@ void SmCursor::Move(OutputDevice* pDev, SmMovementDirection direction, bool bMov
 void SmCursor::MoveTo(OutputDevice* pDev, Point pos, bool bMoveAnchor){
     SmCaretLine best_line,  //Best line found so far, when iterating
                 curr_line;  //Current line, when iterating
-    SmCaretPosGraphEntry* NewPos = NULL;
+    SmCaretPosGraphEntry* NewPos = nullptr;
     long dp_sq = 0,     //Distance to current line squared
          dbp_sq = 1;    //Distance to best line squared
     SmCaretPosGraphIterator it = mpGraph->GetIterator();
@@ -252,7 +252,7 @@ void SmCursor::Delete(){
 
     //Find an arbitrary selected node
     SmNode* pSNode = FindSelectedNode(mpTree);
-    OSL_ENSURE(pSNode != NULL, "There must be a selection when HasSelection is true!");
+    OSL_ENSURE(pSNode != nullptr, "There must be a selection when HasSelection is true!");
 
     //Find the topmost node of the line that holds the selection
     SmNode* pLine = FindTopMostNodeInLine(pSNode, true);
@@ -335,7 +335,7 @@ void SmCursor::InsertNodes(SmNodeList* pNewNodes){
     PosAfterInsert =    PatchLineList(pLineList, it);
     //Release list, we've taken the nodes
     delete pNewNodes;
-    pNewNodes = NULL;
+    pNewNodes = nullptr;
 
     //Finish editing
     FinishEdit(pLineList, pLineParent, nParentIndex, PosAfterInsert);
@@ -374,8 +374,8 @@ SmNodeList::iterator SmCursor::FindPositionInLineList(SmNodeList* pLineList, SmC
 
 SmCaretPos SmCursor::PatchLineList(SmNodeList* pLineList, SmNodeList::iterator aIter) {
     //The nodes we should consider merging
-    SmNode *prev = NULL,
-           *next = NULL;
+    SmNode *prev = nullptr,
+           *next = nullptr;
     if(aIter != pLineList->end())
         next = *aIter;
     if(aIter != pLineList->begin()) {
@@ -498,7 +498,7 @@ void SmCursor::InsertSubSup(SmSubSup eSubSup) {
     SmNode *pLine;
     if(HasSelection()) {
         SmNode *pSNode = FindSelectedNode(mpTree);
-        OSL_ENSURE(pSNode != NULL, "There must be a selected node when HasSelection is true!");
+        OSL_ENSURE(pSNode != nullptr, "There must be a selected node when HasSelection is true!");
         pLine = FindTopMostNodeInLine(pSNode, true);
     } else
         pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
@@ -554,7 +554,7 @@ void SmCursor::InsertSubSup(SmSubSup eSubSup) {
         pSubSup = static_cast<SmSubSupNode*>(pSubject);
     //pSubject shouldn't be referenced anymore, pSubSup is the SmSubSupNode in pLineList we wish to edit.
     //and it pointer to the element following pSubSup in pLineList.
-    pSubject = NULL;
+    pSubject = nullptr;
 
     //Patch the line if we noted that was needed previously
     if(bPatchLine)
@@ -568,7 +568,7 @@ void SmCursor::InsertSubSup(SmSubSup eSubSup) {
     unsigned int nOldSize = pScriptLineList->size();
     pScriptLineList->insert(pScriptLineList->end(), pSelectedNodesList->begin(), pSelectedNodesList->end());
     delete pSelectedNodesList;
-    pSelectedNodesList = NULL;
+    pSelectedNodesList = nullptr;
 
     //Patch pScriptLineList if needed
     if(0 < nOldSize && nOldSize < pScriptLineList->size()) {
@@ -585,7 +585,7 @@ void SmCursor::InsertSubSup(SmSubSup eSubSup) {
     //Parse pScriptLineList
     pScriptLine = SmNodeListParser().Parse(pScriptLineList);
     delete pScriptLineList;
-    pScriptLineList = NULL;
+    pScriptLineList = nullptr;
 
     //Insert pScriptLine back into the tree
     pSubSup->SetSubSup(eSubSup, pScriptLine);
@@ -596,7 +596,7 @@ void SmCursor::InsertSubSup(SmSubSup eSubSup) {
 
 bool SmCursor::InsertLimit(SmSubSup eSubSup, bool bMoveCaret) {
     //Find a subject to set limits on
-    SmOperNode *pSubject = NULL;
+    SmOperNode *pSubject = nullptr;
     //Check if pSelectedNode might be a subject
     if(mpPosition->CaretPos.pSelectedNode->GetType() == NOPER)
         pSubject = static_cast<SmOperNode*>(mpPosition->CaretPos.pSelectedNode);
@@ -614,7 +614,7 @@ bool SmCursor::InsertLimit(SmSubSup eSubSup, bool bMoveCaret) {
     BeginEdit();
 
     //Find the sub sup node
-    SmSubSupNode *pSubSup = NULL;
+    SmSubSupNode *pSubSup = nullptr;
     //Check if there's already one there...
     if(pSubject->GetSubNode(0)->GetType() == NSUBSUP)
         pSubSup = static_cast<SmSubSupNode*>(pSubject->GetSubNode(0));
@@ -630,7 +630,7 @@ bool SmCursor::InsertLimit(SmSubSup eSubSup, bool bMoveCaret) {
 
     //Create the limit, if needed
     SmCaretPos PosAfterLimit;
-    SmNode *pLine = NULL;
+    SmNode *pLine = nullptr;
     if(!pSubSup->GetSubSup(eSubSup)){
         pLine = new SmPlaceNode();
         pSubSup->SetSubSup(eSubSup, pLine);
@@ -669,7 +669,7 @@ void SmCursor::InsertBrackets(SmBracketType eBracketType) {
     SmNode *pLine;
     if(HasSelection()) {
         SmNode *pSNode = FindSelectedNode(mpTree);
-        OSL_ENSURE(pSNode != NULL, "There must be a selected node if HasSelection()");
+        OSL_ENSURE(pSNode != nullptr, "There must be a selected node if HasSelection()");
         pLine = FindTopMostNodeInLine(pSNode, true);
     } else
         pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
@@ -710,7 +710,7 @@ void SmCursor::InsertBrackets(SmBracketType eBracketType) {
     SmNode *pLeft = CreateBracket(eBracketType, true),
            *pRight = CreateBracket(eBracketType, false);
     SmBracebodyNode *pBody = new SmBracebodyNode(SmToken());
-    pBody->SetSubNodes(pBodyNode, NULL);
+    pBody->SetSubNodes(pBodyNode, nullptr);
     pBrace->SetSubNodes(pLeft, pBody, pRight);
     pBrace->Prepare(mpDocShell->GetFormat(), *mpDocShell);
 
@@ -806,7 +806,7 @@ bool SmCursor::InsertRow() {
     SmNode *pLine;
     if(HasSelection()) {
         SmNode *pSNode = FindSelectedNode(mpTree);
-        OSL_ENSURE(pSNode != NULL, "There must be a selected node if HasSelection()");
+        OSL_ENSURE(pSNode != nullptr, "There must be a selected node if HasSelection()");
         pLine = FindTopMostNodeInLine(pSNode, true);
     } else
         pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
@@ -822,8 +822,8 @@ bool SmCursor::InsertRow() {
     }
 
     //Discover the context of this command
-    SmTableNode  *pTable  = NULL;
-    SmMatrixNode *pMatrix = NULL;
+    SmTableNode  *pTable  = nullptr;
+    SmMatrixNode *pMatrix = nullptr;
     int nTableIndex = nParentIndex;
     if(pLineParent->GetType() == NTABLE)
         pTable = static_cast<SmTableNode*>(pLineParent);
@@ -877,7 +877,7 @@ bool SmCursor::InsertRow() {
         //Wrap pNewLine in SmLineNode if needed
         if(pLineParent->GetType() == NLINE) {
             SmLineNode *pNewLineNode = new SmLineNode(SmToken(TNEWLINE, '\0', "newline"));
-            pNewLineNode->SetSubNodes(pNewLine, NULL);
+            pNewLineNode->SetSubNodes(pNewLine, nullptr);
             pNewLine = pNewLineNode;
         }
         //Get position
@@ -930,7 +930,7 @@ void SmCursor::InsertFraction() {
     SmNode *pLine;
     if(HasSelection()) {
         SmNode *pSNode = FindSelectedNode(mpTree);
-        OSL_ENSURE(pSNode != NULL, "There must be a selected node when HasSelection is true!");
+        OSL_ENSURE(pSNode != nullptr, "There must be a selected node when HasSelection is true!");
         pLine = FindTopMostNodeInLine(pSNode, true);
     } else
         pLine = FindTopMostNodeInLine(mpPosition->CaretPos.pSelectedNode);
@@ -965,7 +965,7 @@ void SmCursor::InsertFraction() {
         : SmNodeListParser().Parse(pSelectedNodesList);
     SmNode *pDenom = new SmPlaceNode();
     delete pSelectedNodesList;
-    pSelectedNodesList = NULL;
+    pSelectedNodesList = nullptr;
 
     //Create new fraction
     SmBinVerNode *pFrac = new SmBinVerNode(SmToken(TOVER, '\0', "over", TGPRODUCT, 0));
@@ -1014,7 +1014,7 @@ void SmCursor::InsertElement(SmFormulaElement element){
     Delete();
 
     //Create new node
-    SmNode* pNewNode = NULL;
+    SmNode* pNewNode = nullptr;
     switch(element){
         case BlankElement:
         {
@@ -1096,7 +1096,7 @@ void SmCursor::InsertElement(SmFormulaElement element){
         default:
             SAL_WARN("starmath", "Element unknown!");
     }
-    OSL_ENSURE(pNewNode != NULL, "No new node was created!");
+    OSL_ENSURE(pNewNode != nullptr, "No new node was created!");
     if(!pNewNode)
         return;
 
@@ -1254,7 +1254,7 @@ void SmCursor::SetClipboard(SmNodeList* pList){
 SmNode* SmCursor::FindTopMostNodeInLine(SmNode* pSNode, bool MoveUpIfSelected){
     //If we haven't got a subnode
     if(!pSNode)
-        return NULL;
+        return nullptr;
 
     //Move up parent until we find a node who's
     //parent is NULL or isn't selected and not a type of:
@@ -1282,7 +1282,7 @@ SmNode* SmCursor::FindSelectedNode(SmNode* pNode){
         if(pRetVal)
             return pRetVal;
     }
-    return NULL;
+    return nullptr;
 }
 
 SmNodeList* SmCursor::LineToList(SmStructureNode* pLine, SmNodeList* list){
@@ -1390,7 +1390,7 @@ void SmCursor::FinishEdit(SmNodeList* pLineList,
         SmNode *pLeft  = CreateBracket(RoundBrackets, true),
                *pRight = CreateBracket(RoundBrackets, false);
         SmBracebodyNode *pBody = new SmBracebodyNode(SmToken());
-        pBody->SetSubNodes(pLine, NULL);
+        pBody->SetSubNodes(pLine, nullptr);
         pBrace->SetSubNodes(pLeft, pBody, pRight);
         pBrace->Prepare(mpDocShell->GetFormat(), *mpDocShell);
         pLine = pBrace;
@@ -1456,7 +1456,7 @@ void SmCursor::EndEdit(){
     //TODO: Consider copying the update accessibility code from SmDocShell::SetText in here...
     //This somehow updates the size of SmGraphicView if it is running in embedded mode
     if( mpDocShell->GetCreateMode() == SfxObjectCreateMode::EMBEDDED )
-        mpDocShell->OnDocumentPrinterChanged(0);
+        mpDocShell->OnDocumentPrinterChanged(nullptr);
 
     //Request a repaint...
     RequestRepaint();
@@ -1586,7 +1586,7 @@ SmNode* SmNodeListParser::Parse(SmNodeList* list, bool bDeleteErrorNodes){
         }
     }
     SmNode* retval = Expression();
-    pList = NULL;
+    pList = nullptr;
     return retval;
 }
 
@@ -1678,7 +1678,7 @@ SmNode* SmNodeListParser::Factor(){
 SmNode* SmNodeListParser::Postfix(){
     if(!Terminal())
         return Error();
-    SmNode *pArg = NULL;
+    SmNode *pArg = nullptr;
     if(IsPostfixOperator(Terminal()->GetToken()))
         pArg = Error();
     else if(IsOperator(Terminal()->GetToken()))
diff --git a/starmath/source/detreg.cxx b/starmath/source/detreg.cxx
index 1ce1296e309f..54fca7ec2371 100644
--- a/starmath/source/detreg.cxx
+++ b/starmath/source/detreg.cxx
@@ -35,11 +35,11 @@ SAL_DLLPUBLIC_EXPORT void* SAL_CALL smd_component_getFactory( const sal_Char* pI
                                      void* /*pRegistryKey*/ )
 {
     // Set default return value for this operation - if it failed.
-    void* pReturn = NULL ;
+    void* pReturn = nullptr ;
 
     if  (
-            ( pImplementationName   !=  NULL ) &&
-            ( pServiceManager       !=  NULL )
+            ( pImplementationName   !=  nullptr ) &&
+            ( pServiceManager       !=  nullptr )
         )
     {
         // Define variables which are used in following macros.
diff --git a/starmath/source/dialog.cxx b/starmath/source/dialog.cxx
index 50d65ad29904..cd53905ee03a 100644
--- a/starmath/source/dialog.cxx
+++ b/starmath/source/dialog.cxx
@@ -505,7 +505,7 @@ IMPL_LINK_TYPED( SmFontTypeDialog, MenuSelectHdl, Menu *, pMenu, bool )
         case 5: pActiveListBox = m_pSerifFont; bHideCheckboxes = true;   break;
         case 6: pActiveListBox = m_pSansFont;  bHideCheckboxes = true;   break;
         case 7: pActiveListBox = m_pFixedFont; bHideCheckboxes = true;   break;
-        default:pActiveListBox = NULL;
+        default:pActiveListBox = nullptr;
     }
 
     if (pActiveListBox)
@@ -667,8 +667,8 @@ SmCategoryDesc::SmCategoryDesc(VclBuilderContainer& rBuilder, sal_uInt16 nCatego
         }
         else
         {
-            Strings  [i] = 0;
-            Graphics [i] = 0;
+            Strings  [i] = nullptr;
+            Graphics [i] = nullptr;
         }
 
         const FieldMinMax& rMinMax = pMinMaxData[ nCategoryIdx-1 ][i];
@@ -772,15 +772,15 @@ void SmDistanceDialog::SetCategory(sal_uInt16 nCategory)
 #endif
     static const char * aCatMf2Hid[10][4] =
     {
-        { HID_SMA_DEFAULT_DIST,         HID_SMA_LINE_DIST,          HID_SMA_ROOT_DIST, 0 },
-        { HID_SMA_SUP_DIST,             HID_SMA_SUB_DIST ,          0, 0 },
-        { HID_SMA_NUMERATOR_DIST,       HID_SMA_DENOMINATOR_DIST,   0, 0 },
-        { HID_SMA_FRACLINE_EXCWIDTH,    HID_SMA_FRACLINE_LINEWIDTH, 0, 0 },
-        { HID_SMA_UPPERLIMIT_DIST,      HID_SMA_LOWERLIMIT_DIST,    0, 0 },
-        { HID_SMA_BRACKET_EXCHEIGHT,    HID_SMA_BRACKET_DIST,       0, HID_SMA_BRACKET_EXCHEIGHT2 },
-        { HID_SMA_MATRIXROW_DIST,       HID_SMA_MATRIXCOL_DIST,     0, 0 },
-        { HID_SMA_ATTRIBUT_DIST,        HID_SMA_INTERATTRIBUT_DIST, 0, 0 },
-        { HID_SMA_OPERATOR_EXCHEIGHT,   HID_SMA_OPERATOR_DIST,      0, 0 },
+        { HID_SMA_DEFAULT_DIST,         HID_SMA_LINE_DIST,          HID_SMA_ROOT_DIST, nullptr },
+        { HID_SMA_SUP_DIST,             HID_SMA_SUB_DIST ,          nullptr, nullptr },
+        { HID_SMA_NUMERATOR_DIST,       HID_SMA_DENOMINATOR_DIST,   nullptr, nullptr },
+        { HID_SMA_FRACLINE_EXCWIDTH,    HID_SMA_FRACLINE_LINEWIDTH, nullptr, nullptr },
+        { HID_SMA_UPPERLIMIT_DIST,      HID_SMA_LOWERLIMIT_DIST,    nullptr, nullptr },
+        { HID_SMA_BRACKET_EXCHEIGHT,    HID_SMA_BRACKET_DIST,       nullptr, HID_SMA_BRACKET_EXCHEIGHT2 },
+        { HID_SMA_MATRIXROW_DIST,       HID_SMA_MATRIXCOL_DIST,     nullptr, nullptr },
+        { HID_SMA_ATTRIBUT_DIST,        HID_SMA_INTERATTRIBUT_DIST, nullptr, nullptr },
+        { HID_SMA_OPERATOR_EXCHEIGHT,   HID_SMA_OPERATOR_DIST,      nullptr, nullptr },
         { HID_SMA_LEFTBORDER_DIST,      HID_SMA_RIGHTBORDER_DIST,   HID_SMA_UPPERBORDER_DIST, HID_SMA_LOWERBORDER_DIST }
     };
 
@@ -820,7 +820,7 @@ void SmDistanceDialog::SetCategory(sal_uInt16 nCategory)
 
         // To determine which Controls should be active, the existence
         // of an associated HelpID is checked
-        bActive = aCatMf2Hid[nCategory][i] != 0;
+        bActive = aCatMf2Hid[nCategory][i] != nullptr;
 
         pFT->Show(bActive);
         pFT->Enable(bActive);
@@ -1095,7 +1095,7 @@ void SmAlignDialog::WriteTo(SmFormat &rFormat) const
 
 SmShowSymbolSetWindow::SmShowSymbolSetWindow(vcl::Window *pParent, WinBits nStyle)
     : Control(pParent, nStyle)
-    , m_pVScrollBar(0)
+    , m_pVScrollBar(nullptr)
     , nLen(0)
     , nRows(0)
     , nColumns(0)
@@ -1625,7 +1625,7 @@ bool SmSymbolDialog::SelectSymbolSet(const OUString &rSymbolSetName)
 
 void SmSymbolDialog::SelectSymbol(sal_uInt16 nSymbolNo)
 {
-    const SmSym *pSym = NULL;
+    const SmSym *pSym = nullptr;
     if (!aSymbolSetName.isEmpty()  &&  nSymbolNo < static_cast< sal_uInt16 >(aSymbolSet.size()))
         pSym = aSymbolSet[ nSymbolNo ];
 
@@ -1638,7 +1638,7 @@ const SmSym* SmSymbolDialog::GetSymbol() const
 {
     sal_uInt16 nSymbolNo = m_pSymbolSetDisplay->GetSelectSymbol();
     bool bValid = !aSymbolSetName.isEmpty()  &&  nSymbolNo < static_cast< sal_uInt16 >(aSymbolSet.size());
-    return bValid ? aSymbolSet[ nSymbolNo ] : NULL;
+    return bValid ? aSymbolSet[ nSymbolNo ] : nullptr;
 }
 
 VCL_BUILDER_DECL_FACTORY(SmShowChar)
@@ -1954,7 +1954,7 @@ IMPL_LINK_TYPED( SmSymDefineDialog, ChangeClickHdl, Button *, pButton, void )
 
     // clear display for original symbol if necessary
     if (bNameChanged)
-        SetOrigSymbol(NULL, OUString());
+        SetOrigSymbol(nullptr, OUString());
 
     // update display of new symbol
     pSymbolDisplay->SetSymbol( &aNewSymbol );
@@ -1984,7 +1984,7 @@ IMPL_LINK_TYPED( SmSymDefineDialog, DeleteClickHdl, Button *, pButton, void )
         aSymbolMgrCopy.RemoveSymbol( pOrigSymbol->GetName() );
 
         // clear display for original symbol
-        SetOrigSymbol(NULL, OUString());
+        SetOrigSymbol(nullptr, OUString());
 
         // update list box entries
         FillSymbolSets(*pOldSymbolSets, false);
@@ -2019,7 +2019,7 @@ void SmSymDefineDialog::UpdateButtons()
                     && pCharsetDisplay->GetSelectCharacter() == pOrigSymbol->GetCharacter();
 
         // only add it if there isn't already a symbol with the same name
-        bAdd    = aSymbolMgrCopy.GetSymbolByName(aTmpSymbolName) == NULL;
+        bAdd    = aSymbolMgrCopy.GetSymbolByName(aTmpSymbolName) == nullptr;
 
         // only delete it if all settings are equal
         bDelete = bool(pOrigSymbol);
@@ -2039,7 +2039,7 @@ SmSymDefineDialog::SmSymDefineDialog(vcl::Window * pParent,
     rSymbolMgr          (rMgr),
     pOrigSymbol         (),
     pSubsetMap          (),
-    pFontList           (NULL)
+    pFontList           (nullptr)
 {
     get(pOldSymbols, "oldSymbols");
     get(pOldSymbolSets, "oldSymbolSets");
@@ -2302,7 +2302,7 @@ bool SmSymDefineDialog::SelectSymbol(ComboBox &rComboBox,
     if (bIsOld)
     {
         // if there's a change of the old symbol, show only the available ones, otherwise show none
-        const SmSym *pOldSymbol = NULL;
+        const SmSym *pOldSymbol = nullptr;
         OUString     aTmpOldSymbolSetName;
         if (nPos != COMBOBOX_ENTRY_NOTFOUND)
         {
@@ -2339,7 +2339,7 @@ void SmSymDefineDialog::SetFont(const OUString &rFontName, const OUString &rStyl
     pFontsSubsetLB->Clear();
     bool bFirst = true;
     const Subset* pSubset;
-    while( NULL != (pSubset = pSubsetMap->GetNextSubset( bFirst )) )
+    while( nullptr != (pSubset = pSubsetMap->GetNextSubset( bFirst )) )
     {
         const sal_Int32 nPos = pFontsSubsetLB->InsertEntry( pSubset->GetName());
         pFontsSubsetLB->SetEntryData( nPos, const_cast<Subset *>(pSubset) );
@@ -2352,7 +2352,7 @@ void SmSymDefineDialog::SetFont(const OUString &rFontName, const OUString &rStyl
         pFontsSubsetLB->SetNoSelection();
     pFontsSubsetLB->Enable( !bFirst );
 
-    pFontCharMap = 0;
+    pFontCharMap = nullptr;
 }
 
 
diff --git a/starmath/source/document.cxx b/starmath/source/document.cxx
index fcc69d480f07..5ed4579a00b1 100644
--- a/starmath/source/document.cxx
+++ b/starmath/source/document.cxx
@@ -183,7 +183,7 @@ void SmDocShell::SetText(const OUString& rBuffer)
         SetModified(true);
 
         // launch accessible event if necessary
-        SmGraphicAccessible *pAcc = pViewSh ? pViewSh->GetGraphicWindow().GetAccessible_Impl() : 0;
+        SmGraphicAccessible *pAcc = pViewSh ? pViewSh->GetGraphicWindow().GetAccessible_Impl() : nullptr;
         if (pAcc)
         {
             Any aOldValue, aNewValue;
@@ -195,7 +195,7 @@ void SmDocShell::SetText(const OUString& rBuffer)
         }
 
         if ( GetCreateMode() == SfxObjectCreateMode::EMBEDDED )
-            OnDocumentPrinterChanged(0);
+            OnDocumentPrinterChanged(nullptr);
     }
 }
 
@@ -491,7 +491,7 @@ Size SmDocShell::GetSize()
 
 void SmDocShell::InvalidateCursor(){
     delete pCursor;
-    pCursor = NULL;
+    pCursor = nullptr;
 }
 
 SmCursor& SmDocShell::GetCursor(){
@@ -625,7 +625,7 @@ void SmDocShell::OnDocumentPrinterChanged( Printer *pPrt )
     Repaint();
     if( aOldSize != GetVisArea().GetSize() && !aText.isEmpty() )
         SetModified( true );
-    pTmpPrinter = 0;
+    pTmpPrinter = nullptr;
 }
 
 void SmDocShell::Repaint()
@@ -648,15 +648,15 @@ void SmDocShell::Repaint()
 
 SmDocShell::SmDocShell( SfxModelFlags i_nSfxCreationFlags )
     : SfxObjectShell(i_nSfxCreationFlags)
-    , pTree(0)
-    , pEditEngineItemPool(0)
-    , pEditEngine(0)
-    , pPrinter(0)
-    , pTmpPrinter(0)
+    , pTree(nullptr)
+    , pEditEngineItemPool(nullptr)
+    , pEditEngine(nullptr)
+    , pPrinter(nullptr)
+    , pTmpPrinter(nullptr)
     , nModifyCount(0)
     , bIsFormulaArranged(false)
 {
-    pCursor = NULL;
+    pCursor = nullptr;
 
     SetPool(&SfxGetpApp()->GetPool());
 
@@ -678,7 +678,7 @@ SmDocShell::~SmDocShell()
 
 
     delete pCursor;
-    pCursor = NULL;
+    pCursor = nullptr;
 
     delete pEditEngine;
     SfxItemPool::Free(pEditEngineItemPool);
@@ -698,7 +698,7 @@ bool SmDocShell::ConvertFrom(SfxMedium &rMedium)
         if (pTree)
         {
             delete pTree;
-            pTree = 0;
+            pTree = nullptr;
             InvalidateCursor();
         }
         Reference<css::frame::XModel> xModel(GetModel());
@@ -1188,7 +1188,7 @@ void SmDocShell::GetState(SfxItemSet &rSet)
             {
                 SfxViewFrame* pFrm = SfxViewFrame::GetFirst( this );
                 if( pFrm )
-                    pFrm->GetSlotState( nWh, NULL, &rSet );
+                    pFrm->GetSlotState( nWh, nullptr, &rSet );
                 else
                     rSet.DisableItem( nWh );
             }
diff --git a/starmath/source/edit.cxx b/starmath/source/edit.cxx
index 70e976bdd9aa..26ab3433b54c 100644
--- a/starmath/source/edit.cxx
+++ b/starmath/source/edit.cxx
@@ -177,7 +177,7 @@ SmViewShell * SmEditWindow::GetView()
 SmDocShell * SmEditWindow::GetDoc()
 {
     SmViewShell *pView = rCmdBox.GetView();
-    return pView ? pView->GetDoc() : 0;
+    return pView ? pView->GetDoc() : nullptr;
 }
 
 EditView * SmEditWindow::GetEditView()
@@ -187,7 +187,7 @@ EditView * SmEditWindow::GetEditView()
 
 EditEngine * SmEditWindow::GetEditEngine()
 {
-    EditEngine *pEditEng = 0;
+    EditEngine *pEditEng = nullptr;
     if (pEditView)
         pEditEng = pEditView->GetEditEngine();
     else
@@ -203,7 +203,7 @@ EditEngine * SmEditWindow::GetEditEngine()
 SfxItemPool * SmEditWindow::GetEditEngineItemPool()
 {
     SmDocShell *pDoc = GetDoc();
-    return pDoc ? &pDoc->GetEditEngineItemPool() : 0;
+    return pDoc ? &pDoc->GetEditEngineItemPool() : nullptr;
 }
 
 void SmEditWindow::ApplyColorConfigValues( const svtools::ColorConfig &rColorCfg )
@@ -347,7 +347,7 @@ void SmEditWindow::Command(const CommandEvent& rCEvt)
         std::unique_ptr<PopupMenu> xPopupMenu(new PopupMenu(SmResId(RID_COMMANDMENU)));
 
         // added for replaceability of context menus
-        Menu* pMenu = NULL;
+        Menu* pMenu = nullptr;
         css::ui::ContextMenuExecuteEvent aEvent;
         aEvent.SourceWindow = VCLUnoHelper::GetInterface( this );
         aEvent.ExecutePosition.X = aPoint.X();
diff --git a/starmath/source/mathmlexport.cxx b/starmath/source/mathmlexport.cxx
index 1749b99be7fd..2492d26d916a 100644
--- a/starmath/source/mathmlexport.cxx
+++ b/starmath/source/mathmlexport.cxx
@@ -106,7 +106,7 @@ bool SmXMLExportWrapper::Export(SfxMedium &rMedium)
         (xTunnel->getSomething(SmModel::getUnoTunnelId()));
 
     SmDocShell *pDocShell = pModel ?
-            static_cast<SmDocShell*>(pModel->GetObjectShell()) : 0;
+            static_cast<SmDocShell*>(pModel->GetObjectShell()) : nullptr;
     if ( pDocShell &&
         SfxObjectCreateMode::EMBEDDED == pDocShell->GetCreateMode() )
         bEmbedded = true;
@@ -260,7 +260,7 @@ bool SmXMLExportWrapper::WriteThroughComponent(
 {
     OSL_ENSURE(xOutputStream.is(), "I really need an output stream!");
     OSL_ENSURE(xComponent.is(), "Need component!");
-    OSL_ENSURE(NULL != pComponentName, "Need component name!");
+    OSL_ENSURE(nullptr != pComponentName, "Need component name!");
 
     // get component
     Reference< xml::sax::XWriter > xSaxWriter = xml::sax::Writer::create(rxContext );
@@ -312,7 +312,7 @@ bool SmXMLExportWrapper::WriteThroughComponent(
     )
 {
     OSL_ENSURE(xStorage.is(), "Need storage!");
-    OSL_ENSURE(NULL != pStreamName, "Need stream name!");
+    OSL_ENSURE(nullptr != pStreamName, "Need stream name!");
 
     // open stream
     Reference < io::XStream > xStream;
@@ -361,7 +361,7 @@ SmXMLExport::SmXMLExport(
     OUString const & implementationName, SvXMLExportFlags nExportFlags)
     : SvXMLExport(util::MeasureUnit::INCH, rContext, implementationName, XML_MATH,
                   nExportFlags)
-    , pTree(0)
+    , pTree(nullptr)
     , bSuccess(false)
 {
 }
@@ -475,7 +475,7 @@ void SmXMLExport::_ExportContent()
     SmModel *pModel = reinterpret_cast<SmModel *>
         (xTunnel->getSomething(SmModel::getUnoTunnelId()));
     SmDocShell *pDocShell = pModel ?
-        static_cast<SmDocShell*>(pModel->GetObjectShell()) : 0;
+        static_cast<SmDocShell*>(pModel->GetObjectShell()) : nullptr;
     OSL_ENSURE( pDocShell, "doc shell missing" );
 
     if (pDocShell && !pDocShell->GetFormat().IsTextmode())
@@ -486,7 +486,7 @@ void SmXMLExport::_ExportContent()
         AddAttribute(XML_NAMESPACE_MATH, XML_DISPLAY, XML_BLOCK);
     }
     SvXMLElementExport aEquation(*this, XML_NAMESPACE_MATH, XML_MATH, true, true);
-    SvXMLElementExport *pSemantics=0;
+    SvXMLElementExport *pSemantics=nullptr;
 
     if (!aText.isEmpty())
     {
@@ -652,7 +652,7 @@ void SmXMLExport::ExportUnaryHorizontal(const SmNode *pNode, int nLevel)
 void SmXMLExport::ExportExpression(const SmNode *pNode, int nLevel,
                                    bool bNoMrowContainer /*=false*/)
 {
-    SvXMLElementExport *pRow=0;
+    SvXMLElementExport *pRow=nullptr;
     auto nSize = pNode->GetNumSubNodes();
 
     // #i115443: nodes of type expression always need to be grouped with mrow statement
@@ -729,7 +729,7 @@ void SmXMLExport::ExportBinaryDiagonal(const SmNode *pNode, int nLevel)
 
 void SmXMLExport::ExportTable(const SmNode *pNode, int nLevel)
 {
-    SvXMLElementExport *pTable=0;
+    SvXMLElementExport *pTable=nullptr;
 
     sal_uInt16 nSize = pNode->GetNumSubNodes();
 
@@ -741,7 +741,7 @@ void SmXMLExport::ExportTable(const SmNode *pNode, int nLevel)
     {
         const SmNode *pLine = pNode->GetSubNode(nSize-1);
         if (pLine->GetType() == NLINE && pLine->GetNumSubNodes() == 1 &&
-            pLine->GetSubNode(0) != NULL &&
+            pLine->GetSubNode(0) != nullptr &&
             pLine->GetSubNode(0)->GetToken().eType == TNEWLINE)
             --nSize;
     }
@@ -754,8 +754,8 @@ void SmXMLExport::ExportTable(const SmNode *pNode, int nLevel)
     for (sal_uInt16 i = 0; i < nSize; i++)
         if (const SmNode *pTemp = pNode->GetSubNode(i))
         {
-            SvXMLElementExport *pRow=0;
-            SvXMLElementExport *pCell=0;
+            SvXMLElementExport *pRow=nullptr;
+            SvXMLElementExport *pCell=nullptr;
             if (pTable)
             {
                 pRow  = new SvXMLElementExport(*this, XML_NAMESPACE_MATH, XML_MTR, true, true);
@@ -798,7 +798,7 @@ void SmXMLExport::ExportTable(const SmNode *pNode, int nLevel)
 void SmXMLExport::ExportMath(const SmNode *pNode, int /*nLevel*/)
 {
     const SmMathSymbolNode *pTemp = static_cast<const SmMathSymbolNode *>(pNode);
-    SvXMLElementExport *pMath = 0;
+    SvXMLElementExport *pMath = nullptr;
 
     if (pNode->GetType() == NMATH || pNode->GetType() == NGLYPH_SPECIAL)
     {
@@ -889,12 +889,12 @@ void SmXMLExport::ExportBlank(const SmNode *pNode, int /*nLevel*/)
 
 void SmXMLExport::ExportSubSupScript(const SmNode *pNode, int nLevel)
 {
-    const SmNode *pSub  = 0;
-    const SmNode *pSup  = 0;
-    const SmNode *pCSub = 0;
-    const SmNode *pCSup = 0;
-    const SmNode *pLSub = 0;
-    const SmNode *pLSup = 0;
+    const SmNode *pSub  = nullptr;
+    const SmNode *pSup  = nullptr;
+    const SmNode *pCSub = nullptr;
+    const SmNode *pCSup = nullptr;
+    const SmNode *pLSub = nullptr;
+    const SmNode *pLSup = nullptr;
     SvXMLElementExport *pThing2 = nullptr;
 
     //if we have prescripts at all then we must use the tensor notation
@@ -910,18 +910,18 @@ void SmXMLExport::ExportSubSupScript(const SmNode *pNode, int nLevel)
             XML_MMULTISCRIPTS, true, true);
 
 
-        if (NULL != (pCSub = pNode->GetSubNode(CSUB+1))
-            && NULL != (pCSup = pNode->GetSubNode(CSUP+1)))
+        if (nullptr != (pCSub = pNode->GetSubNode(CSUB+1))
+            && nullptr != (pCSup = pNode->GetSubNode(CSUP+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MUNDEROVER, true, true);
         }
-        else if (NULL != (pCSub = pNode->GetSubNode(CSUB+1)))
+        else if (nullptr != (pCSub = pNode->GetSubNode(CSUB+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MUNDER, true, true);
         }
-        else if (NULL != (pCSup = pNode->GetSubNode(CSUP+1)))
+        else if (nullptr != (pCSup = pNode->GetSubNode(CSUP+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MOVER, true, true);
@@ -979,35 +979,35 @@ void SmXMLExport::ExportSubSupScript(const SmNode *pNode, int nLevel)
     else
     {
         SvXMLElementExport *pThing = nullptr;
-        if (NULL != (pSub = pNode->GetSubNode(RSUB+1)) &&
-            NULL != (pSup = pNode->GetSubNode(RSUP+1)))
+        if (nullptr != (pSub = pNode->GetSubNode(RSUB+1)) &&
+            nullptr != (pSup = pNode->GetSubNode(RSUP+1)))
         {
             pThing = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MSUBSUP, true, true);
         }
-        else if (NULL != (pSub = pNode->GetSubNode(RSUB+1)))
+        else if (nullptr != (pSub = pNode->GetSubNode(RSUB+1)))
         {
             pThing = new SvXMLElementExport(*this, XML_NAMESPACE_MATH, XML_MSUB,
                 true, true);
         }
-        else if (NULL != (pSup = pNode->GetSubNode(RSUP+1)))
+        else if (nullptr != (pSup = pNode->GetSubNode(RSUP+1)))
         {
             pThing = new SvXMLElementExport(*this, XML_NAMESPACE_MATH, XML_MSUP,
                 true, true);
         }
 
-        if (NULL != (pCSub = pNode->GetSubNode(CSUB+1))
-            && NULL != (pCSup=pNode->GetSubNode(CSUP+1)))
+        if (nullptr != (pCSub = pNode->GetSubNode(CSUB+1))
+            && nullptr != (pCSup=pNode->GetSubNode(CSUP+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MUNDEROVER, true, true);
         }
-        else if (NULL != (pCSub = pNode->GetSubNode(CSUB+1)))
+        else if (nullptr != (pCSub = pNode->GetSubNode(CSUB+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MUNDER, true, true);
         }
-        else if (NULL != (pCSup = pNode->GetSubNode(CSUP+1)))
+        else if (nullptr != (pCSup = pNode->GetSubNode(CSUP+1)))
         {
             pThing2 = new SvXMLElementExport(*this, XML_NAMESPACE_MATH,
                 XML_MOVER, true, true);
@@ -1033,7 +1033,7 @@ void SmXMLExport::ExportBrace(const SmNode *pNode, int nLevel)
     const SmNode *pTemp;
     const SmNode *pLeft=pNode->GetSubNode(0);
     const SmNode *pRight=pNode->GetSubNode(2);
-    SvXMLElementExport *pRow=0;
+    SvXMLElementExport *pRow=nullptr;
 
     // This used to generate <mfenced> or <mrow>+<mo> elements according to
     // the stretchiness of fences. The MathML recommendation defines an
@@ -1058,7 +1058,7 @@ void SmXMLExport::ExportBrace(const SmNode *pNode, int nLevel)
         ExportNodes(pLeft, nLevel+1);
     }
 
-    if (NULL != (pTemp = pNode->GetSubNode(1)))
+    if (nullptr != (pTemp = pNode->GetSubNode(1)))
     {
         // <mrow>
         SvXMLElementExport aRow(*this, XML_NAMESPACE_MATH, XML_MROW,
@@ -1111,7 +1111,7 @@ void SmXMLExport::ExportOperator(const SmNode *pNode, int nLevel)
 
 void SmXMLExport::ExportAttributes(const SmNode *pNode, int nLevel)
 {
-    SvXMLElementExport *pElement=0;
+    SvXMLElementExport *pElement=nullptr;
 
     if (pNode->GetToken().eType == TUNDERLINE)
     {
diff --git a/starmath/source/mathmlimport.cxx b/starmath/source/mathmlimport.cxx
index 98cb9ad5f5da..7a6038387cd3 100644
--- a/starmath/source/mathmlimport.cxx
+++ b/starmath/source/mathmlimport.cxx
@@ -101,7 +101,7 @@ sal_uLong SmXMLImportWrapper::Import(SfxMedium &rMedium)
         (xTunnel->getSomething(SmModel::getUnoTunnelId()));
 
     SmDocShell *pDocShell = pModel ?
-            static_cast<SmDocShell*>(pModel->GetObjectShell()) : 0;
+            static_cast<SmDocShell*>(pModel->GetObjectShell()) : nullptr;
     if (pDocShell)
     {
         OSL_ENSURE( pDocShell->GetMedium() == &rMedium,
@@ -195,7 +195,7 @@ sal_uLong SmXMLImportWrapper::Import(SfxMedium &rMedium)
                 xStatusIndicator->setValue(nSteps++);
 
             nWarn = ReadThroughComponent(
-                rMedium.GetStorage(), xModelComp, "settings.xml", 0,
+                rMedium.GetStorage(), xModelComp, "settings.xml", nullptr,
                 xContext, xInfoSet,
                 (bOASIS ? "com.sun.star.comp.Math.XMLOasisSettingsImporter"
                         : "com.sun.star.comp.Math.XMLSettingsImporter" ) );
@@ -246,7 +246,7 @@ sal_uLong SmXMLImportWrapper::ReadThroughComponent(
     OSL_ENSURE(xInputStream.is(), "input stream missing");
     OSL_ENSURE(xModelComponent.is(), "document missing");
     OSL_ENSURE(rxContext.is(), "factory missing");
-    OSL_ENSURE(NULL != pFilterName,"I need a service name for the component!");
+    OSL_ENSURE(nullptr != pFilterName,"I need a service name for the component!");
 
     // prepare ParserInputSrouce
     xml::sax::InputSource aParserInput;
@@ -340,7 +340,7 @@ sal_uLong SmXMLImportWrapper::ReadThroughComponent(
     const sal_Char* pFilterName )
 {
     OSL_ENSURE(xStorage.is(), "Need storage!");
-    OSL_ENSURE(NULL != pStreamName, "Please, please, give me a name!");
+    OSL_ENSURE(nullptr != pStreamName, "Please, please, give me a name!");
 
     // open stream (and set parser input)
     OUString sStreamName = OUString::createFromAscii(pStreamName);
@@ -486,7 +486,7 @@ void SmXMLImport::endDocument()
 {
     //Set the resulted tree into the SmDocShell where it belongs
     SmNode *pTree;
-    if (NULL != (pTree = GetTree()))
+    if (nullptr != (pTree = GetTree()))
     {
         uno::Reference <frame::XModel> xModel = GetModel();
         uno::Reference <lang::XUnoTunnel> xTunnel(xModel,uno::UNO_QUERY);
@@ -565,7 +565,7 @@ SvXMLImportContext * SmXMLImportContext::CreateChildContext(sal_uInt16 /*nPrefix
     const OUString& /*rLocalName*/,
     const uno::Reference< xml::sax::XAttributeList > & /*xAttrList*/)
 {
-    return 0;
+    return nullptr;
 }
 
 
@@ -672,7 +672,7 @@ void SmXMLContext_Helper::ApplyAttrs()
             else
                 aToken.eType = TNBOLD;
             std::unique_ptr<SmFontNode> pFontNode(new SmFontNode(aToken));
-            pFontNode->SetSubNodes(0,popOrZero(rNodeStack));
+            pFontNode->SetSubNodes(nullptr,popOrZero(rNodeStack));
             rNodeStack.push_front(std::move(pFontNode));
         }
         if (nIsItalic != -1)
@@ -682,7 +682,7 @@ void SmXMLContext_Helper::ApplyAttrs()
             else
                 aToken.eType = TNITALIC;
             std::unique_ptr<SmFontNode> pFontNode(new SmFontNode(aToken));
-            pFontNode->SetSubNodes(0,popOrZero(rNodeStack));
+            pFontNode->SetSubNodes(nullptr,popOrZero(rNodeStack));
             rNodeStack.push_front(std::move(pFontNode));
         }
         if (nFontSize != 0.0)
@@ -703,7 +703,7 @@ void SmXMLContext_Helper::ApplyAttrs()
             else
                 pFontNode->SetSizeParameter(Fraction(nFontSize),FontSizeType::ABSOLUT);
 
-            pFontNode->SetSubNodes(0,popOrZero(rNodeStack));
+            pFontNode->SetSubNodes(nullptr,popOrZero(rNodeStack));
             rNodeStack.push_front(std::move(pFontNode));
         }
         if (!sFontFamily.isEmpty())
@@ -720,7 +720,7 @@ void SmXMLContext_Helper::ApplyAttrs()
 
             aToken.aText = sFontFamily;
             std::unique_ptr<SmFontNode> pFontNode(new SmFontNode(aToken));
-            pFontNode->SetSubNodes(0,popOrZero(rNodeStack));
+            pFontNode->SetSubNodes(nullptr,popOrZero(rNodeStack));
             rNodeStack.push_front(std::move(pFontNode));
         }
         if (!sColor.isEmpty())
@@ -734,7 +734,7 @@ void SmXMLContext_Helper::ApplyAttrs()
             {
                 aToken.eType = static_cast<SmTokenType>(tok);
                 std::unique_ptr<SmFontNode> pFontNode(new SmFontNode(aToken));
-                pFontNode->SetSubNodes(0,popOrZero(rNodeStack));
+                pFontNode->SetSubNodes(nullptr,popOrZero(rNodeStack));
                 rNodeStack.push_front(std::move(pFontNode));
             }
         }
@@ -932,7 +932,7 @@ void SmXMLPhantomContext_Impl::EndElement()
 
     std::unique_ptr<SmFontNode> pPhantom(new SmFontNode(aToken));
     SmNodeStack &rNodeStack = GetSmImport().GetNodeStack();
-    pPhantom->SetSubNodes(0,popOrZero(rNodeStack));
+    pPhantom->SetSubNodes(nullptr,popOrZero(rNodeStack));
     rNodeStack.push_front(std::move(pPhantom));
 }
 
@@ -1409,7 +1409,7 @@ void SmXMLSubContext_Impl::GenericEndElement(SmTokenType eType, SmSubSup eSubSup
     SmNodeArray  aSubNodes;
     aSubNodes.resize(1 + SUBSUP_NUM_ENTRIES);
     for (size_t i = 1;  i < aSubNodes.size();  i++)
-        aSubNodes[i] = NULL;
+        aSubNodes[i] = nullptr;
 
     aSubNodes[eSubSup+1] = popOrZero(rNodeStack);
     aSubNodes[0] = popOrZero(rNodeStack);
@@ -1469,7 +1469,7 @@ void SmXMLSubSupContext_Impl::GenericEndElement(SmTokenType eType,
     SmNodeArray  aSubNodes;
     aSubNodes.resize(1 + SUBSUP_NUM_ENTRIES);
     for (size_t i = 1;  i < aSubNodes.size();  i++)
-        aSubNodes[i] = NULL;
+        aSubNodes[i] = nullptr;
 
     aSubNodes[aSup+1] = popOrZero(rNodeStack);
     aSubNodes[aSub+1] = popOrZero(rNodeStack);
@@ -1767,7 +1767,7 @@ SvXMLImportContext *SmXMLOfficeContext_Impl::CreateChildContext(sal_uInt16 nPref
         const OUString& rLocalName,
         const uno::Reference< xml::sax::XAttributeList > &xAttrList)
 {
-    SvXMLImportContext *pContext = 0;
+    SvXMLImportContext *pContext = nullptr;
     if ( XML_NAMESPACE_OFFICE == nPrefix &&
         rLocalName == GetXMLToken(XML_META) )
     {
@@ -2026,7 +2026,7 @@ SvXMLImportContext *SmXMLDocContext_Impl::CreateChildContext(
     const OUString& rLocalName,
     const uno::Reference<xml::sax::XAttributeList>& xAttrList)
 {
-    SvXMLImportContext* pContext = 0L;
+    SvXMLImportContext* pContext = nullptr;
 
     const SvXMLTokenMap& rTokenMap = GetSmImport().GetPresLayoutElemTokenMap();
 
@@ -2211,7 +2211,7 @@ void SmXMLSqrtContext_Impl::EndElement()
     std::unique_ptr<SmStructureNode> pSNode(new SmRootNode(aToken));
     SmNode *pOper = new SmRootSymbolNode(aToken);
     SmNodeStack &rNodeStack = GetSmImport().GetNodeStack();
-    pSNode->SetSubNodes(0,pOper,popOrZero(rNodeStack));
+    pSNode->SetSubNodes(nullptr,pOper,popOrZero(rNodeStack));
     rNodeStack.push_front(std::move(pSNode));
 }
 
@@ -2315,7 +2315,7 @@ SvXMLImportContext *SmXMLRowContext_Impl::StrictCreateChildContext(
     const OUString& rLocalName,
     const uno::Reference<xml::sax::XAttributeList>& xAttrList)
 {
-    SvXMLImportContext* pContext = 0L;
+    SvXMLImportContext* pContext = nullptr;
 
     const SvXMLTokenMap& rTokenMap = GetSmImport().GetPresElemTokenMap();
     switch(rTokenMap.Get(nPrefix, rLocalName))
@@ -2389,7 +2389,7 @@ SvXMLImportContext *SmXMLMultiScriptsContext_Impl::CreateChildContext(
     const OUString& rLocalName,
     const uno::Reference<xml::sax::XAttributeList>& xAttrList)
 {
-    SvXMLImportContext* pContext = 0L;
+    SvXMLImportContext* pContext = nullptr;
 
     const SvXMLTokenMap& rTokenMap = GetSmImport().
         GetPresScriptEmptyElemTokenMap();
@@ -2544,7 +2544,7 @@ SvXMLImportContext *SmXMLTableRowContext_Impl::CreateChildContext(
     const OUString& rLocalName,
     const uno::Reference<xml::sax::XAttributeList>& xAttrList)
 {
-    SvXMLImportContext* pContext = 0L;
+    SvXMLImportContext* pContext = nullptr;
 
     const SvXMLTokenMap& rTokenMap = GetSmImport().
         GetPresTableElemTokenMap();
@@ -2567,7 +2567,7 @@ SvXMLImportContext *SmXMLTableContext_Impl::CreateChildContext(
     const OUString& rLocalName,
     const uno::Reference<xml::sax::XAttributeList>& xAttrList)
 {
-    SvXMLImportContext* pContext = 0L;
+    SvXMLImportContext* pContext = nullptr;
 
     const SvXMLTokenMap& rTokenMap = GetSmImport().
         GetPresTableElemTokenMap();
diff --git a/starmath/source/mathtype.cxx b/starmath/source/mathtype.cxx
index 791e698aa2a6..804de7278daf 100644
--- a/starmath/source/mathtype.cxx
+++ b/starmath/source/mathtype.cxx
@@ -77,7 +77,7 @@ bool MathType::LookupChar(sal_Unicode nChar,OUString &rRet,sal_uInt8 nVersion,
     sal_uInt8 nTypeFace)
 {
     bool bRet=false;
-    const char *pC = NULL;
+    const char *pC = nullptr;
     switch(nChar)
     {
         case 0x0000:
@@ -523,7 +523,7 @@ bool MathType::LookupChar(sal_Unicode nChar,OUString &rRet,sal_uInt8 nVersion,
 
 void MathTypeFont::AppendStyleToText(OUString &rRet)
 {
-    const char *pC = NULL;
+    const char *pC = nullptr;
     switch (nStyle)
     {
         default:
@@ -2141,14 +2141,14 @@ void MathType::HandleRoot(SmNode *pNode,int nLevel)
         pS->WriteUChar( 0x00 ); //variation
     pS->WriteUChar( 0x00 ); //options
 
-    if (NULL != (pTemp = pNode->GetSubNode(2)))
+    if (nullptr != (pTemp = pNode->GetSubNode(2)))
     {
         pS->WriteUChar( LINE ); //line
         HandleNodes(pTemp,nLevel+1);
         pS->WriteUChar( END );
     }
 
-    if (NULL != (pTemp = pNode->GetSubNode(0)))
+    if (nullptr != (pTemp = pNode->GetSubNode(0)))
     {
         pS->WriteUChar( LINE ); //line
         HandleNodes(pTemp,nLevel+1);
@@ -2197,7 +2197,7 @@ sal_uInt8 MathType::HandleCScript(SmNode *pNode,SmNode *pContent,int nLevel,
         pS->WriteUChar( 0x0B );
 
         SmNode *pTemp;
-        if (NULL != (pTemp = pNode->GetSubNode(CSUB+1)))
+        if (nullptr != (pTemp = pNode->GetSubNode(CSUB+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2205,7 +2205,7 @@ sal_uInt8 MathType::HandleCScript(SmNode *pNode,SmNode *pContent,int nLevel,
         }
         else
             pS->WriteUChar( LINE|0x10 );
-        if (bTest && NULL != (pTemp = pNode->GetSubNode(CSUP+1)))
+        if (bTest && nullptr != (pTemp = pNode->GetSubNode(CSUP+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2234,7 +2234,7 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
         if (pNode->GetSubNode(LSUB+1))
             nVariation=2;
     }
-    else if ( NULL != pNode->GetSubNode(LSUB+1) )
+    else if ( nullptr != pNode->GetSubNode(LSUB+1) )
         nVariation=1;
 
     SmNode *pTemp;
@@ -2246,7 +2246,7 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
         pS->WriteUChar( 0x00 ); //options
         pS->WriteUChar( 0x0B );
 
-        if (NULL != (pTemp = pNode->GetSubNode(LSUB+1)))
+        if (nullptr != (pTemp = pNode->GetSubNode(LSUB+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2254,7 +2254,7 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
         }
         else
             pS->WriteUChar( LINE|0x10 );
-        if (NULL != (pTemp = pNode->GetSubNode(LSUP+1)))
+        if (nullptr != (pTemp = pNode->GetSubNode(LSUP+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2267,9 +2267,9 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
     }
 
 
-    sal_uInt8 nVariation2=HandleCScript(pNode,NULL,nLevel);
+    sal_uInt8 nVariation2=HandleCScript(pNode,nullptr,nLevel);
 
-    if (NULL != (pTemp = pNode->GetSubNode(0)))
+    if (nullptr != (pTemp = pNode->GetSubNode(0)))
     {
         HandleNodes(pTemp,nLevel+1);
     }
@@ -2277,13 +2277,13 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
     if (nVariation2 != 0xff)
         pS->WriteUChar( END );
 
-    if (NULL != (pNode->GetSubNode(RSUP+1)))
+    if (nullptr != (pNode->GetSubNode(RSUP+1)))
     {
         nVariation=0;
         if (pNode->GetSubNode(RSUB+1))
             nVariation=2;
     }
-    else if (NULL != pNode->GetSubNode(RSUB+1))
+    else if (nullptr != pNode->GetSubNode(RSUB+1))
         nVariation=1;
 
     if (nVariation!=0xff)
@@ -2294,7 +2294,7 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
         pS->WriteUChar( 0x00 ); //options
         pS->WriteUChar( 0x0B );
 
-        if (NULL != (pTemp = pNode->GetSubNode(RSUB+1)))
+        if (nullptr != (pTemp = pNode->GetSubNode(RSUB+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2302,7 +2302,7 @@ void MathType::HandleSubSupScript(SmNode *pNode,int nLevel)
         }
         else
             pS->WriteUChar( LINE|0x10 );
-        if (NULL != (pTemp = pNode->GetSubNode(RSUP+1)))
+        if (nullptr != (pTemp = pNode->GetSubNode(RSUP+1)))
         {
             pS->WriteUChar( LINE ); //line
             HandleNodes(pTemp,nLevel+1);
@@ -2329,13 +2329,13 @@ void MathType::HandleFractions(SmNode *pNode,int nLevel)
 
     pS->WriteUChar( 0x0A );
     pS->WriteUChar( LINE ); //line
-    if (NULL != (pTemp = pNode->GetSubNode(0)))
+    if (nullptr != (pTemp = pNode->GetSubNode(0)))
         HandleNodes(pTemp,nLevel+1);
     pS->WriteUChar( END );
 
     pS->WriteUChar( 0x0A );
     pS->WriteUChar( LINE ); //line
-    if (NULL != (pTemp = pNode->GetSubNode(2)))
+    if (nullptr != (pTemp = pNode->GetSubNode(2)))
         HandleNodes(pTemp,nLevel+1);
     pS->WriteUChar( END );
 
@@ -2399,7 +2399,7 @@ void MathType::HandleBrace(SmNode *pNode,int nLevel)
         }
     }
 
-    if (NULL != (pTemp = pNode->GetSubNode(1)))
+    if (nullptr != (pTemp = pNode->GetSubNode(1)))
     {
         pS->WriteUChar( LINE ); //line
         HandleNodes(pTemp,nLevel+1);
@@ -2437,14 +2437,14 @@ void MathType::HandleVerticalBrace(SmNode *pNode,int nLevel)
     pS->WriteUChar( 0 ); //variation
     pS->WriteUChar( 0 ); //options
 
-    if (NULL != (pTemp = pNode->GetSubNode(0)))
+    if (nullptr != (pTemp = pNode->GetSubNode(0)))
     {
         pS->WriteUChar( LINE ); //line
         HandleNodes(pTemp,nLevel+1);
         pS->WriteUChar( END ); //options
     }
 
-    if (NULL != (pTemp = pNode->GetSubNode(2)))
+    if (nullptr != (pTemp = pNode->GetSubNode(2)))
     {
         pS->WriteUChar( LINE ); //line
         HandleNodes(pTemp,nLevel+1);
@@ -2965,7 +2965,7 @@ bool MathType::HandleLim(SmNode *pNode,int nLevel)
     {
         if (pNode->GetSubNode(1))
         {
-            sal_uInt8 nVariation2=HandleCScript(pNode->GetSubNode(0),NULL,
+            sal_uInt8 nVariation2=HandleCScript(pNode->GetSubNode(0),nullptr,
                 nLevel);
 
             pS->WriteUChar( 0x0A );
@@ -3163,10 +3163,10 @@ void MathType::HandleMath(SmNode *pNode, int /*nLevel*/)
 void MathType::HandleAttributes(SmNode *pNode,int nLevel)
 {
     int nOldPending = 0;
-    SmNode *pTemp       = 0;
-    SmTextNode *pIsText = 0;
+    SmNode *pTemp       = nullptr;
+    SmTextNode *pIsText = nullptr;
 
-    if (NULL != (pTemp = pNode->GetSubNode(0)))
+    if (nullptr != (pTemp = pNode->GetSubNode(0)))
     {
         pIsText = static_cast<SmTextNode *>(pNode->GetSubNode(1));
 
@@ -3226,7 +3226,7 @@ void MathType::HandleAttributes(SmNode *pNode,int nLevel)
         nPendingAttributes--;
     else
     {
-        if ((nInsertion != 0) && NULL != (pTemp = pNode->GetSubNode(0)))
+        if ((nInsertion != 0) && nullptr != (pTemp = pNode->GetSubNode(0)))
         {
             sal_uLong nPos = pS->Tell();
             nInsertion--;
diff --git a/starmath/source/mathtype.hxx b/starmath/source/mathtype.hxx
index 80eee96ee266..16cc9e8aa487 100644
--- a/starmath/source/mathtype.hxx
+++ b/starmath/source/mathtype.hxx
@@ -59,9 +59,9 @@ public:
         , nProduct(0)
         , nProdVersion(0)
         , nProdSubVersion(0)
-        , pS(NULL)
+        , pS(nullptr)
         , rRet(rIn)
-        , pTree(NULL)
+        , pTree(nullptr)
         , nHAlign(0)
         , nVAlign(0)
         , nPendingAttributes(0)
@@ -87,7 +87,7 @@ public:
         , nProduct(0)
         , nProdVersion(0)
         , nProdSubVersion(0)
-        , pS(NULL)
+        , pS(nullptr)
         , rRet(rIn)
         , pTree(pIn)
         , nHAlign(2)
@@ -154,7 +154,7 @@ private:
     void HandleRoot(SmNode *pNode,int nLevel);
     void HandleSubSupScript(SmNode *pNode,int nLevel);
     sal_uInt8 HandleCScript(SmNode *pNode,SmNode *pContent,int nLevel,
-        sal_uLong *pPos=NULL,bool bTest=true);
+        sal_uLong *pPos=nullptr,bool bTest=true);
     void HandleFractions(SmNode *pNode,int nLevel);
     void HandleBrace(SmNode *pNode,int nLevel);
     void HandleVerticalBrace(SmNode *pNode,int nLevel);
diff --git a/starmath/source/node.cxx b/starmath/source/node.cxx
index aed9dc5585ba..cf50b773e18e 100644
--- a/starmath/source/node.cxx
+++ b/starmath/source/node.cxx
@@ -88,7 +88,7 @@ sal_uInt16 SmNode::GetNumSubNodes() const
 
 SmNode * SmNode::GetSubNode(sal_uInt16 /*nIndex*/)
 {
-    return NULL;
+    return nullptr;
 }
 
 
@@ -98,7 +98,7 @@ SmNode * SmNode::GetLeftMost()
     //! for the current node).
 {
     SmNode *pNode = GetNumSubNodes() > 0 ?
-                        GetSubNode(0) : NULL;
+                        GetSubNode(0) : nullptr;
 
     return pNode ? pNode->GetLeftMost() : this;
 }
@@ -337,14 +337,14 @@ const SmNode * SmNode::FindTokenAt(sal_uInt16 nRow, sal_uInt16 nCol) const
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 
 const SmNode * SmNode::FindRectClosestTo(const Point &rPoint) const
 {
     long          nDist   = LONG_MAX;
-    const SmNode *pResult = 0;
+    const SmNode *pResult = nullptr;
 
     if (IsVisible())
         pResult = this;
@@ -385,7 +385,7 @@ void SmNode::GetAccessibleText( OUStringBuffer &/*rText*/ ) const
 
 const SmNode * SmNode::FindNodeWithAccessibleIndex(sal_Int32 nAccIdx) const
 {
-    const SmNode *pResult = 0;
+    const SmNode *pResult = nullptr;
 
     sal_Int32 nIdx = GetAccessibleIndex();
     OUStringBuffer aTxt;
@@ -533,7 +533,7 @@ SmStructureNode::SmStructureNode( const SmStructureNode &rNode ) :
     for (i = 0;  i < nSize;  ++i)
     {
         SmNode *pNode = rNode.aSubNodes[i];
-        aSubNodes[i] = pNode ? new SmNode( *pNode ) : 0;
+        aSubNodes[i] = pNode ? new SmNode( *pNode ) : nullptr;
     }
     ClaimPaternity();
 }
@@ -559,7 +559,7 @@ SmStructureNode & SmStructureNode::operator = ( const SmStructureNode &rNode )
     for (i = 0;  i < nSize;  ++i)
     {
         SmNode *pNode = rNode.aSubNodes[i];
-        aSubNodes[i] = pNode ? new SmNode( *pNode ) : 0;
+        aSubNodes[i] = pNode ? new SmNode( *pNode ) : nullptr;
     }
 
     ClaimPaternity();
@@ -644,7 +644,7 @@ sal_uInt16 SmVisibleNode::GetNumSubNodes() const
 
 SmNode * SmVisibleNode::GetSubNode(sal_uInt16 /*nIndex*/)
 {
-    return NULL;
+    return nullptr;
 }
 
 void SmGraphicNode::GetAccessibleText( OUStringBuffer &rText ) const
@@ -696,7 +696,7 @@ void SmTableNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
           nTmp;
     sal_uInt16 i;
     for (i = 0; i < nSize;  i++)
-        if (NULL != (pNode = GetSubNode(i)))
+        if (nullptr != (pNode = GetSubNode(i)))
         {   pNode->Arrange(rDev, rFormat);
             if ((nTmp = pNode->GetItalicWidth()) > nMaxWidth)
                 nMaxWidth = nTmp;
@@ -705,7 +705,7 @@ void SmTableNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
     Point  aPos;
     SmRect::operator = (SmRect(nMaxWidth, 1));
     for (i = 0;  i < nSize;  i++)
-    {   if (NULL != (pNode = GetSubNode(i)))
+    {   if (nullptr != (pNode = GetSubNode(i)))
         {   const SmRect &rNodeRect = pNode->GetRect();
             const SmNode *pCoNode   = pNode->GetLeftMost();
             RectHorAlign  eHorAlign = pCoNode->GetRectHorAlign();
@@ -771,7 +771,7 @@ void SmLineNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
     sal_uInt16  nSize = GetNumSubNodes();
     sal_uInt16 i;
     for (i = 0; i < nSize;  i++)
-        if (NULL != (pNode = GetSubNode(i)))
+        if (nullptr != (pNode = GetSubNode(i)))
             pNode->Arrange(rDev, rFormat);
 
     SmTmpDevice aTmpDev ((OutputDevice &) rDev, true);
@@ -800,11 +800,11 @@ void SmLineNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
 
     Point   aPos;
     // copy the first node into LineNode and extend by the others
-    if (NULL != (pNode = GetSubNode(0)))
+    if (nullptr != (pNode = GetSubNode(0)))
         SmRect::operator = (pNode->GetRect());
 
     for (i = 1;  i < nSize;  i++)
-        if (NULL != (pNode = GetSubNode(i)))
+        if (nullptr != (pNode = GetSubNode(i)))
         {
             aPos = pNode->AlignTo(*this, RP_RIGHT, RHA_CENTER, RVA_BASELINE);
 
@@ -1031,9 +1031,9 @@ void SmBinHorNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
     SmNode *pLeft  = GetSubNode(0),
            *pOper  = GetSubNode(1),
            *pRight = GetSubNode(2);
-    OSL_ENSURE(pLeft  != NULL, "Sm: NULL pointer");
-    OSL_ENSURE(pOper  != NULL, "Sm: NULL pointer");
-    OSL_ENSURE(pRight != NULL, "Sm: NULL pointer");
+    OSL_ENSURE(pLeft  != nullptr, "Sm: NULL pointer");
+    OSL_ENSURE(pOper  != nullptr, "Sm: NULL pointer");
+    OSL_ENSURE(pRight != nullptr, "Sm: NULL pointer");
 
     pOper->SetSize(Fraction (rFormat.GetRelSize(SIZ_OPERATOR), 100));
 
@@ -1510,33 +1510,33 @@ void SmSubSupNode::CreateTextFromNode(OUString &rText)
     SmNode *pNode;
     GetSubNode(0)->CreateTextFromNode(rText);
 
-    if (NULL != (pNode = GetSubNode(LSUB+1)))
+    if (nullptr != (pNode = GetSubNode(LSUB+1)))
     {
         rText += "lsub ";
         pNode->CreateTextFromNode(rText);
     }
-    if (NULL != (pNode = GetSubNode(LSUP+1)))
+    if (nullptr != (pNode = GetSubNode(LSUP+1)))
     {
         rText += "lsup ";
         pNode->CreateTextFromNode(rText);
     }
-    if (NULL != (pNode = GetSubNode(CSUB+1)))
+    if (nullptr != (pNode = GetSubNode(CSUB+1)))
     {
         rText += "csub ";
         pNode->CreateTextFromNode(rText);
     }
-    if (NULL != (pNode = GetSubNode(CSUP+1)))
+    if (nullptr != (pNode = GetSubNode(CSUP+1)))
     {
         rText += "csup ";
         pNode->CreateTextFromNode(rText);
     }
-    if (NULL != (pNode = GetSubNode(RSUB+1)))
+    if (nullptr != (pNode = GetSubNode(RSUB+1)))
     {
         rText = comphelper::string::stripEnd(rText, ' ');
         rText += "_";
         pNode->CreateTextFromNode(rText);
     }
-    if (NULL != (pNode = GetSubNode(RSUP+1)))
+    if (nullptr != (pNode = GetSubNode(RSUP+1)))
     {
         rText = comphelper::string::stripEnd(rText, ' ');
         rText += "^";
@@ -2498,7 +2498,7 @@ void SmMatrixNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
     for (i = 0;  i < nNodes;  i++)
     {
         sal_uInt16 nIdx = nNodes - 1 - i;
-        if (NULL != (pNode = GetSubNode(nIdx)))
+        if (nullptr != (pNode = GetSubNode(nIdx)))
         {
             pNode->Arrange(rDev, rFormat);
             int  nCol = nIdx % nNumCols;
@@ -2571,7 +2571,7 @@ void SmMatrixNode::Arrange(const OutputDevice &rDev, const SmFormat &rFormat)
         aDelta.Y() = aPos.Y() - aLineRect.GetTop();
         aLineRect.Move(aDelta);
         for (j = 0;  j < nNumCols;  j++)
-            if (NULL != (pNode = GetSubNode(i * nNumCols + j)))
+            if (nullptr != (pNode = GetSubNode(i * nNumCols + j)))
                 pNode->Move(aDelta);
 
         ExtendBy(aLineRect, RCP_NONE);
@@ -2617,7 +2617,7 @@ void SmMathSymbolNode::AdaptToX(const OutputDevice &rDev, sal_uLong nWidth)
 
     // get denominator of error factor for width
     long nTmpBorderWidth = GetFont().GetBorderWidth();
-    long nDenom = SmRect(aTmpDev, NULL, GetText(), nTmpBorderWidth).GetItalicWidth();
+    long nDenom = SmRect(aTmpDev, nullptr, GetText(), nTmpBorderWidth).GetItalicWidth();
 
     // scale fontwidth with this error factor
     aFntSize.Width() *= nWidth;
@@ -2653,7 +2653,7 @@ void SmMathSymbolNode::AdaptToY(const OutputDevice &rDev, sal_uLong nHeight)
 
     // get denominator of error factor for height
     long nTmpBorderWidth = GetFont().GetBorderWidth();
-    long nDenom = SmRect(aTmpDev, NULL, GetText(), nTmpBorderWidth).GetHeight();
+    long nDenom = SmRect(aTmpDev, nullptr, GetText(), nTmpBorderWidth).GetHeight();
 
     // scale fontwidth with this error factor
     aFntSize.Height() *= nHeight;
@@ -2730,7 +2730,7 @@ void SmAttributNode::CreateTextFromNode(OUString &rText)
     OSL_ENSURE(nSize == 2, "Node missing members");
     rText += "{";
     sal_Unicode nLast=0;
-    if (NULL != (pNode = GetSubNode(0)))
+    if (nullptr != (pNode = GetSubNode(0)))
     {
         OUString aStr;
         pNode->CreateTextFromNode(aStr);
@@ -2802,7 +2802,7 @@ void SmAttributNode::CreateTextFromNode(OUString &rText)
     }
 
     if (nSize == 2)
-        if (NULL != (pNode = GetSubNode(1)))
+        if (nullptr != (pNode = GetSubNode(1)))
             pNode->CreateTextFromNode(rText);
 
     rText = comphelper::string::stripEnd(rText, ' ');
@@ -2854,7 +2854,7 @@ void SmSpecialNode::Prepare(const SmFormat &rFormat, const SmDocShell &rDocShell
     SmModule  *pp = SM_MOD();
 
     OUString aName(GetToken().aText.copy(1));
-    if (NULL != (pSym = pp->GetSymbolManager().GetSymbolByName( aName )))
+    if (nullptr != (pSym = pp->GetSymbolManager().GetSymbolByName( aName )))
     {
         sal_UCS4 cChar = pSym->GetCharacter();
         OUString aTmp( &cChar, 1 );
diff --git a/starmath/source/ooxmlexport.cxx b/starmath/source/ooxmlexport.cxx
index 0573e6478798..5a72ee11784b 100644
--- a/starmath/source/ooxmlexport.cxx
+++ b/starmath/source/ooxmlexport.cxx
@@ -24,7 +24,7 @@ SmOoxmlExport::SmOoxmlExport( const SmNode* pIn, OoxmlVersion v )
 
 bool SmOoxmlExport::ConvertFromStarMath( ::sax_fastparser::FSHelperPtr serializer )
 {
-    if( m_pTree == NULL )
+    if( m_pTree == nullptr )
         return false;
     m_pSerializer = serializer;
     m_pSerializer->startElementNS( XML_m, XML_oMath,
@@ -132,7 +132,7 @@ void SmOoxmlExport::HandleText( const SmNode* pNode, int /*nLevel*/)
 void SmOoxmlExport::HandleFractions( const SmNode* pNode, int nLevel, const char* type )
 {
     m_pSerializer->startElementNS( XML_m, XML_f, FSEND );
-    if( type != NULL )
+    if( type != nullptr )
     {
         m_pSerializer->startElementNS( XML_m, XML_fPr, FSEND );
         m_pSerializer->singleElementNS( XML_m, XML_type, FSNS( XML_m, XML_val ), type, FSEND );
@@ -260,18 +260,18 @@ void SmOoxmlExport::HandleOperator( const SmOperNode* pNode, int nLevel )
         case TSUM:
         {
             const SmSubSupNode* subsup = pNode->GetSubNode( 0 )->GetType() == NSUBSUP
-                ? static_cast< const SmSubSupNode* >( pNode->GetSubNode( 0 )) : NULL;
-            const SmNode* operation = subsup != NULL ? subsup->GetBody() : pNode->GetSubNode( 0 );
+                ? static_cast< const SmSubSupNode* >( pNode->GetSubNode( 0 )) : nullptr;
+            const SmNode* operation = subsup != nullptr ? subsup->GetBody() : pNode->GetSubNode( 0 );
             m_pSerializer->startElementNS( XML_m, XML_nary, FSEND );
             m_pSerializer->startElementNS( XML_m, XML_naryPr, FSEND );
             m_pSerializer->singleElementNS( XML_m, XML_chr,
                 FSNS( XML_m, XML_val ), mathSymbolToString( operation ).getStr(), FSEND );
-            if( subsup == NULL || subsup->GetSubSup( CSUB ) == NULL )
+            if( subsup == nullptr || subsup->GetSubSup( CSUB ) == nullptr )
                 m_pSerializer->singleElementNS( XML_m, XML_subHide, FSNS( XML_m, XML_val ), "1", FSEND );
-            if( subsup == NULL || subsup->GetSubSup( CSUP ) == NULL )
+            if( subsup == nullptr || subsup->GetSubSup( CSUP ) == nullptr )
                 m_pSerializer->singleElementNS( XML_m, XML_supHide, FSNS( XML_m, XML_val ), "1", FSEND );
             m_pSerializer->endElementNS( XML_m, XML_naryPr );
-            if( subsup == NULL || subsup->GetSubSup( CSUB ) == NULL )
+            if( subsup == nullptr || subsup->GetSubSup( CSUB ) == nullptr )
                 m_pSerializer->singleElementNS( XML_m, XML_sub, FSEND );
             else
             {
@@ -279,7 +279,7 @@ void SmOoxmlExport::HandleOperator( const SmOperNode* pNode, int nLevel )
                 HandleNode( subsup->GetSubSup( CSUB ), nLevel + 1 );
                 m_pSerializer->endElementNS( XML_m, XML_sub );
             }
-            if( subsup == NULL || subsup->GetSubSup( CSUP ) == NULL )
+            if( subsup == nullptr || subsup->GetSubSup( CSUP ) == nullptr )
                 m_pSerializer->singleElementNS( XML_m, XML_sup, FSEND );
             else
             {
@@ -302,9 +302,9 @@ void SmOoxmlExport::HandleOperator( const SmOperNode* pNode, int nLevel )
             m_pSerializer->endElementNS( XML_m, XML_e );
             m_pSerializer->startElementNS( XML_m, XML_lim, FSEND );
             if( const SmSubSupNode* subsup = pNode->GetSubNode( 0 )->GetType() == NSUBSUP
-                ? static_cast< const SmSubSupNode* >( pNode->GetSubNode( 0 )) : NULL )
+                ? static_cast< const SmSubSupNode* >( pNode->GetSubNode( 0 )) : nullptr )
             {
-                if( subsup->GetSubSup( CSUB ) != NULL )
+                if( subsup->GetSubSup( CSUB ) != nullptr )
                     HandleNode( subsup->GetSubSup( CSUB ), nLevel + 1 );
             }
             m_pSerializer->endElementNS( XML_m, XML_lim );
diff --git a/starmath/source/ooxmlexport.hxx b/starmath/source/ooxmlexport.hxx
index f71cf9e33916..a4740989d79d 100644
--- a/starmath/source/ooxmlexport.hxx
+++ b/starmath/source/ooxmlexport.hxx
@@ -26,7 +26,7 @@ public:
 private:
     virtual void HandleVerticalStack( const SmNode* pNode, int nLevel ) override;
     virtual void HandleText( const SmNode* pNode, int nLevel ) override;
-    virtual void HandleFractions( const SmNode* pNode, int nLevel, const char* type = NULL ) override;
+    virtual void HandleFractions( const SmNode* pNode, int nLevel, const char* type = nullptr ) override;
     virtual void HandleRoot( const SmRootNode* pNode, int nLevel ) override;
     virtual void HandleAttribute( const SmAttributNode* pNode, int nLevel ) override;
     virtual void HandleOperator( const SmOperNode* pNode, int nLevel ) override;
diff --git a/starmath/source/parse.cxx b/starmath/source/parse.cxx
index d59fed98db98..7cc066797da1 100644
--- a/starmath/source/parse.cxx
+++ b/starmath/source/parse.cxx
@@ -297,7 +297,7 @@ static const SmTokenTableEntry aTokenTable[] =
 
 const SmTokenTableEntry * SmParser::GetTokenTableEntry( const OUString &rName )
 {
-    const SmTokenTableEntry * pRes = 0;
+    const SmTokenTableEntry * pRes = nullptr;
     if (!rName.isEmpty())
     {
         for (size_t i = 0; i < SAL_N_ELEMENTS(aTokenTable); ++i)
@@ -992,7 +992,7 @@ void SmParser::DoTable()
 void SmParser::DoAlign()
     // parse alignment info (if any), then go on with rest of expression
 {
-    SmStructureNode *pSNode = 0;
+    SmStructureNode *pSNode = nullptr;
 
     if (TokenInGroup(TGALIGN))
     {
@@ -1228,7 +1228,7 @@ void SmParser::DoSubSup(sal_uLong nActiveGroup)
     aSubNodes.resize(1 + SUBSUP_NUM_ENTRIES);
     aSubNodes[0] = popOrZero(m_aNodeStack);
     for (size_t i = 1;  i < aSubNodes.size();  i++)
-        aSubNodes[i] = NULL;
+        aSubNodes[i] = nullptr;
 
     // process all sub-/supscripts
     int  nIndex = 0;
@@ -1265,7 +1265,7 @@ void SmParser::DoSubSup(sal_uLong nActiveGroup)
                    "SmParser::Power() : sub-/supscript index falsch");
 
         // set sub-/supscript if not already done
-        if (aSubNodes[nIndex] != NULL)
+        if (aSubNodes[nIndex] != nullptr)
             Error(PE_DOUBLE_SUBSUPSCRIPT);
         aSubNodes[nIndex] = popOrZero(m_aNodeStack);
     }
@@ -1346,7 +1346,7 @@ void SmParser::DoTerm(bool bGroupNumberIdent)
                     if (bNoSpace)   // get rid of the 'no space' node pushed above
                         m_aNodeStack.pop_front();
                     std::unique_ptr<SmStructureNode> pSNode(new SmExpressionNode(m_aCurToken));
-                    pSNode->SetSubNodes(NULL, NULL);
+                    pSNode->SetSubNodes(nullptr, nullptr);
                     m_aNodeStack.push_front(std::move(pSNode));
 
                     NextToken();
@@ -1550,7 +1550,7 @@ void SmParser::DoTerm(bool bGroupNumberIdent)
                 {
                     SmStructureNode *pNode = aStack.top();
                     aStack.pop();
-                    pNode->SetSubNodes(0, pFirstNode);
+                    pNode->SetSubNodes(nullptr, pFirstNode);
                     pFirstNode = pNode;
                 }
                 m_aNodeStack.push_front(std::unique_ptr<SmNode>(pFirstNode));
@@ -1645,7 +1645,7 @@ void SmParser::DoOper()
         case TLIMSUP :
         case TLIMINF :
             {
-                const sal_Char* pLim = 0;
+                const sal_Char* pLim = nullptr;
                 switch (eType)
                 {
                     case TLIM :     pLim = "lim";       break;
@@ -1684,8 +1684,8 @@ void SmParser::DoUnOper()
     bool         bIsPostfix = eType == TFACT;
 
     std::unique_ptr<SmStructureNode> pSNode;
-    SmNode *pOper   = 0,
-           *pExtra  = 0,
+    SmNode *pOper   = nullptr,
+           *pExtra  = nullptr,
            *pArg;
 
     switch (eType)
@@ -1805,7 +1805,7 @@ void SmParser::DoAttribut()
 
     NextToken();
 
-    pSNode->SetSubNodes(pAttr, 0);
+    pSNode->SetSubNodes(pAttr, nullptr);
     pSNode->SetScaleMode(eScaleMode);
     m_aNodeStack.push_front(std::move(pSNode));
 }
@@ -1978,9 +1978,9 @@ void SmParser::DoBrace()
         "Sm: kein Klammer Ausdruck");
 
     std::unique_ptr<SmStructureNode> pSNode(new SmBraceNode(m_aCurToken));
-    SmNode *pBody   = 0,
-           *pLeft   = 0,
-           *pRight  = 0;
+    SmNode *pBody   = nullptr,
+           *pLeft   = nullptr,
+           *pRight  = nullptr;
     SmScaleMode   eScaleMode = SCALE_NONE;
     SmParseError  eError     = PE_NONE;
 
@@ -2341,7 +2341,7 @@ void SmParser::Error(SmParseError eError)
 {
     SmStructureNode *pSNode = new SmExpressionNode(m_aCurToken);
     SmErrorNode     *pErr   = new SmErrorNode(eError, m_aCurToken);
-    pSNode->SetSubNodes(pErr, 0);
+    pSNode->SetSubNodes(pErr, nullptr);
 
     //! put a structure node on the stack (instead of the error node itself)
     //! because sometimes such a node is expected in order to attach some
@@ -2460,7 +2460,7 @@ const SmErrorDesc *SmParser::NextError()
             m_nCurError = 0;
             return m_aErrDescList[ m_nCurError ].get();
         }
-    else return NULL;
+    else return nullptr;
 }
 
 
@@ -2473,7 +2473,7 @@ const SmErrorDesc *SmParser::PrevError()
             m_nCurError = (int) (m_aErrDescList.size() - 1);
             return m_aErrDescList[ m_nCurError ].get();
         }
-    else return NULL;
+    else return nullptr;
 }
 
 
@@ -2485,7 +2485,7 @@ const SmErrorDesc *SmParser::GetError(size_t i)
     if ( (size_t)m_nCurError < m_aErrDescList.size() )
         return m_aErrDescList[ m_nCurError ].get();
 
-    return NULL;
+    return nullptr;
 }
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/starmath/source/register.cxx b/starmath/source/register.cxx
index 6f6062caea41..f28171060fd1 100644
--- a/starmath/source/register.cxx
+++ b/starmath/source/register.cxx
@@ -40,11 +40,11 @@ SAL_DLLPUBLIC_EXPORT void* SAL_CALL sm_component_getFactory( const sal_Char* pIm
                                      void* /*pRegistryKey*/ )
 {
     // Set default return value for this operation - if it failed.
-    void* pReturn = NULL ;
+    void* pReturn = nullptr ;
 
     if  (
-            ( pImplementationName   !=  NULL ) &&
-            ( pServiceManager       !=  NULL )
+            ( pImplementationName   !=  nullptr ) &&
+            ( pServiceManager       !=  nullptr )
         )
     {
         // Define variables which are used in following macros.
diff --git a/starmath/source/rtfexport.cxx b/starmath/source/rtfexport.cxx
index bb08685b4d65..de092ea59d76 100644
--- a/starmath/source/rtfexport.cxx
+++ b/starmath/source/rtfexport.cxx
@@ -15,7 +15,7 @@
 
 SmRtfExport::SmRtfExport(const SmNode* pIn)
     : SmWordExportBase(pIn)
-    , m_pBuffer(0)
+    , m_pBuffer(nullptr)
     , m_nEncoding(RTL_TEXTENCODING_DONTKNOW)
 {
 }
@@ -207,7 +207,7 @@ void SmRtfExport::HandleOperator(const SmOperNode* pNode, int nLevel)
     case TCOPROD:
     case TSUM:
     {
-        const SmSubSupNode* subsup = pNode->GetSubNode(0)->GetType() == NSUBSUP ? static_cast<const SmSubSupNode*>(pNode->GetSubNode(0)) : 0;
+        const SmSubSupNode* subsup = pNode->GetSubNode(0)->GetType() == NSUBSUP ? static_cast<const SmSubSupNode*>(pNode->GetSubNode(0)) : nullptr;
         const SmNode* operation = subsup ? subsup->GetBody() : pNode->GetSubNode(0);
         m_pBuffer->append("{" LO_STRING_SVTOOLS_RTF_MNARY " ");
         m_pBuffer->append("{" LO_STRING_SVTOOLS_RTF_MNARYPR " ");
@@ -249,7 +249,7 @@ void SmRtfExport::HandleOperator(const SmOperNode* pNode, int nLevel)
         HandleNode(pNode->GetSymbol(), nLevel + 1);
         m_pBuffer->append("}"); // me
         m_pBuffer->append("{" LO_STRING_SVTOOLS_RTF_MLIM " ");
-        if (const SmSubSupNode* subsup = pNode->GetSubNode(0)->GetType() == NSUBSUP ? static_cast<const SmSubSupNode*>(pNode->GetSubNode(0)) : 0)
+        if (const SmSubSupNode* subsup = pNode->GetSubNode(0)->GetType() == NSUBSUP ? static_cast<const SmSubSupNode*>(pNode->GetSubNode(0)) : nullptr)
             if (subsup->GetSubSup(CSUB))
                 HandleNode(subsup->GetSubSup(CSUB), nLevel + 1);
         m_pBuffer->append("}"); // mlim
diff --git a/starmath/source/rtfexport.hxx b/starmath/source/rtfexport.hxx
index b1332ccdf0f8..24a50d3d31cd 100644
--- a/starmath/source/rtfexport.hxx
+++ b/starmath/source/rtfexport.hxx
@@ -25,7 +25,7 @@ public:
 private:
     virtual void HandleVerticalStack(const SmNode* pNode, int nLevel) override;
     virtual void HandleText(const SmNode* pNode, int nLevel) override;
-    virtual void HandleFractions(const SmNode* pNode, int nLevel, const char* type = NULL) override;
+    virtual void HandleFractions(const SmNode* pNode, int nLevel, const char* type = nullptr) override;
     virtual void HandleRoot(const SmRootNode* pNode, int nLevel) override;
     virtual void HandleAttribute(const SmAttributNode* pNode, int nLevel) override;
     virtual void HandleOperator(const SmOperNode* pNode, int nLevel) override;
diff --git a/starmath/source/smmod.cxx b/starmath/source/smmod.cxx
index 7e9206e638df..7ded9e325851 100644
--- a/starmath/source/smmod.cxx
+++ b/starmath/source/smmod.cxx
@@ -262,7 +262,7 @@ void SmModule::GetState(SfxItemSet &rSet)
 
 SfxItemSet*  SmModule::CreateItemSet( sal_uInt16 nId )
 {
-    SfxItemSet*  pRet = 0;
+    SfxItemSet*  pRet = nullptr;
     if(nId == SID_SM_EDITOPTIONS)
     {
         pRet = new SfxItemSet(GetPool(),
diff --git a/starmath/source/symbol.cxx b/starmath/source/symbol.cxx
index 91ce716095da..6de4c34921f2 100644
--- a/starmath/source/symbol.cxx
+++ b/starmath/source/symbol.cxx
@@ -140,7 +140,7 @@ SmSymbolManager& SmSymbolManager::operator = (const SmSymbolManager& rSymbolSetM
 
 SmSym *SmSymbolManager::GetSymbolByName(const OUString& rSymbolName)
 {
-    SmSym *pRes = NULL;
+    SmSym *pRes = nullptr;
     SymbolMap_t::iterator aIt( m_aSymbols.find( rSymbolName ) );
     if (aIt != m_aSymbols.end())
         pRes = &aIt->second;
diff --git a/starmath/source/unomodel.cxx b/starmath/source/unomodel.cxx
index fe292eb264bb..b1ecf5c4fdc5 100644
--- a/starmath/source/unomodel.cxx
+++ b/starmath/source/unomodel.cxx
@@ -422,7 +422,7 @@ void SmModel::_setPropertyValues(const PropertyMapEntry** ppEntries, const Any*
 
     SmDocShell *pDocSh = static_cast < SmDocShell * > (GetObjectShell());
 
-    if ( NULL == pDocSh )
+    if ( nullptr == pDocSh )
         throw UnknownPropertyException();
 
     SmFormat aFormat = pDocSh->GetFormat();
@@ -705,7 +705,7 @@ void SmModel::_getPropertyValues( const PropertyMapEntry **ppEntries, Any *pValu
 {
     SmDocShell *pDocSh = static_cast < SmDocShell * > (GetObjectShell());
 
-    if ( NULL == pDocSh )
+    if ( nullptr == pDocSh )
         throw UnknownPropertyException();
 
     const SmFormat & aFormat = pDocSh->GetFormat();
diff --git a/starmath/source/view.cxx b/starmath/source/view.cxx
index 0004a1b61d98..e0489a13cc33 100644
--- a/starmath/source/view.cxx
+++ b/starmath/source/view.cxx
@@ -95,7 +95,7 @@ using namespace css::uno;
 
 SmGraphicWindow::SmGraphicWindow(SmViewShell* pShell)
     : ScrollableWindow(&pShell->GetViewFrame()->GetWindow(), 0)
-    , pAccessible(0)
+    , pAccessible(nullptr)
     , pViewShell(pShell)
     , nZoom(100)
 {
@@ -179,7 +179,7 @@ void SmGraphicWindow::MouseButtonDown(const MouseEvent& rMEvt)
             pViewShell->GetDoc()->GetCursor().MoveTo(this, aPos, !rMEvt.IsShift());
             return;
         }
-        const SmNode *pNode = 0;
+        const SmNode *pNode = nullptr;
         // if it was clicked inside the formula then get the appropriate node
         if (pTree->OrientedDist(aPos) <= 0)
             pNode = pTree->FindRectClosestTo(aPos);
@@ -362,11 +362,11 @@ const SmNode * SmGraphicWindow::SetCursorPos(sal_uInt16 nRow, sal_uInt16 nCol)
     // In any case the search result is being returned.
 {
     if (IsInlineEditEnabled())
-        return NULL;
+        return nullptr;
 
     // find visible node with token at nRow, nCol
     const SmNode *pTree = pViewShell->GetDoc()->GetFormulaTree(),
-                 *pNode = 0;
+                 *pNode = nullptr;
     if (pTree)
         pNode = pTree->FindTokenAt(nRow, nCol);
 
@@ -515,7 +515,7 @@ void SmGraphicWindow::KeyInput(const KeyEvent& rKEvt)
         default:
         {
             sal_Unicode code = rKEvt.GetCharCode();
-            SmBraceNode* pBraceNode = NULL;
+            SmBraceNode* pBraceNode = nullptr;
 
             if(code == ' ') {
                 rCursor.InsertElement(BlankElement);
@@ -698,7 +698,7 @@ void SmEditController::StateChanged(sal_uInt16 nSID, SfxItemState eState, const
 {
     const SfxStringItem *pItem =  dynamic_cast<const SfxStringItem*>( pState);
 
-    if ((pItem != NULL) && (rEdit.GetText() != OUString(pItem->GetValue())))
+    if ((pItem != nullptr) && (rEdit.GetText() != OUString(pItem->GetValue())))
         rEdit.SetText(pItem->GetValue());
     SfxControllerItem::StateChanged (nSID, eState, pState);
 }
@@ -738,7 +738,7 @@ void SmCmdBoxWindow::dispose()
 SmViewShell * SmCmdBoxWindow::GetView()
 {
     SfxDispatcher *pDispatcher = GetBindings().GetDispatcher();
-    SfxViewShell *pView = pDispatcher ? pDispatcher->GetFrame()->GetViewShell() : NULL;
+    SfxViewShell *pView = pDispatcher ? pDispatcher->GetFrame()->GetViewShell() : nullptr;
     return  dynamic_cast<SmViewShell*>( pView);
 }
 
@@ -1295,7 +1295,7 @@ SfxPrinter* SmViewShell::GetPrinter(bool bCreate)
     SmDocShell* pDoc = GetDoc();
     if (pDoc->HasPrinter() || bCreate)
         return pDoc->GetPrinter();
-    return 0;
+    return nullptr;
 }
 
 sal_uInt16 SmViewShell::SetPrinter(SfxPrinter *pNewPrinter, SfxPrinterChangeFlags nDiffFlags, bool )
@@ -1349,7 +1349,7 @@ void SmViewShell::SetStatusText(const OUString& rText)
 void SmViewShell::ShowError(const SmErrorDesc* pErrorDesc)
 {
     SAL_WARN_IF( !GetDoc(), "starmath", "Document missing" );
-    if (pErrorDesc || 0 != (pErrorDesc = GetDoc()->GetParser().GetError(0)) )
+    if (pErrorDesc || nullptr != (pErrorDesc = GetDoc()->GetParser().GetError(0)) )
     {
         SetStatusText( pErrorDesc->m_aText );
         GetEditWindow()->MarkError( Point( pErrorDesc->m_pNode->GetColumn(),
@@ -1478,7 +1478,7 @@ void SmViewShell::Execute(SfxRequest& rReq)
             {
                 GetDoc()->SetText( pWin->GetText() );
                 SetStatusText(OUString());
-                ShowError( 0 );
+                ShowError( nullptr );
                 GetDoc()->Repaint();
             }
             break;
@@ -1567,7 +1567,7 @@ void SmViewShell::Execute(SfxRequest& rReq)
 
         case SID_PASTE:
             {
-                bool bCallExec = 0 == pWin;
+                bool bCallExec = nullptr == pWin;
                 if( !bCallExec )
                 {
                     TransferableDataHelper aDataHelper(
@@ -1752,7 +1752,7 @@ void SmViewShell::Execute(SfxRequest& rReq)
 
         case SID_TEXTSTATUS:
         {
-            if (rReq.GetArgs() != NULL)
+            if (rReq.GetArgs() != nullptr)
             {
                 const SfxStringItem& rItem =
                     static_cast<const SfxStringItem&>(rReq.GetArgs()->Get(SID_TEXTSTATUS));
@@ -1848,11 +1848,11 @@ void SmViewShell::Execute(SfxRequest& rReq)
 
         case SID_UNICODE_NOTATION_TOGGLE:
         {
-            EditEngine* pEditEngine = 0;
+            EditEngine* pEditEngine = nullptr;
             if( pWin )
                 pEditEngine = pWin->GetEditEngine();
 
-            EditView* pEditView = 0;
+            EditView* pEditView = nullptr;
             if( pEditEngine )
                 pEditView = pEditEngine->GetView();
 
@@ -2062,7 +2062,7 @@ IMPL_LINK_TYPED( SmViewShell, DialogClosedHdl, sfx2::FileDialogHelper*, _pFileDl
     {
         SfxMedium* pMedium = pImpl->pDocInserter->CreateMedium();
 
-        if ( pMedium != NULL )
+        if ( pMedium != nullptr )
         {
             if ( pMedium->IsStorage() )
                 Insert( *pMedium );
diff --git a/starmath/source/visitors.cxx b/starmath/source/visitors.cxx
index 54e696188fb4..24c54462cd56 100644
--- a/starmath/source/visitors.cxx
+++ b/starmath/source/visitors.cxx
@@ -992,7 +992,7 @@ void SmCaretPosGraphBuildingVisitor::Visit( SmOperNode* pNode )
     bodyRight->SetRight( right );
 
     //Get subsup pNode if any
-    SmSubSupNode* pSubSup = pOper->GetType( ) == NSUBSUP ? static_cast<SmSubSupNode*>(pOper) : NULL;
+    SmSubSupNode* pSubSup = pOper->GetType( ) == NSUBSUP ? static_cast<SmSubSupNode*>(pOper) : nullptr;
 
     SmNode* pChild;
     SmCaretPosGraphEntry *childLeft;
@@ -1638,10 +1638,10 @@ void SmCloningVisitor::CloneKids( SmStructureNode* pSource, SmStructureNode* pTa
     //Clone children
     for( sal_uInt16 i = 0; i < nSize; i++ ){
         SmNode* pKid;
-        if( NULL != ( pKid = pSource->GetSubNode( i ) ) )
+        if( nullptr != ( pKid = pSource->GetSubNode( i ) ) )
             pKid->Accept( this );
         else
-            pResult = NULL;
+            pResult = nullptr;
         aNodes[i] = pResult;
     }
 
diff --git a/starmath/source/wordexportbase.cxx b/starmath/source/wordexportbase.cxx
index 21b330130654..99420d8005f4 100644
--- a/starmath/source/wordexportbase.cxx
+++ b/starmath/source/wordexportbase.cxx
@@ -125,7 +125,7 @@ void SmWordExportBase::HandleAllSubNodes(const SmNode* pNode, int nLevel)
             ++i)
     {
 // TODO remove when all types of nodes are handled properly
-        if (pNode->GetSubNode(i) == NULL)
+        if (pNode->GetSubNode(i) == nullptr)
         {
             SAL_WARN("starmath.wordbase", "Subnode is NULL, parent node not handled properly");
             continue;
@@ -180,12 +180,12 @@ void SmWordExportBase::HandleMath(const SmNode* pNode, int nLevel)
 void SmWordExportBase::HandleSubSupScript(const SmSubSupNode* pNode, int nLevel)
 {
     // set flags to a bitfield of which sub/sup items exists
-    int flags = (pNode->GetSubSup(CSUB) != NULL ? (1 << CSUB) : 0)
-                | (pNode->GetSubSup(CSUP) != NULL ? (1 << CSUP) : 0)
-                | (pNode->GetSubSup(RSUB) != NULL ? (1 << RSUB) : 0)
-                | (pNode->GetSubSup(RSUP) != NULL ? (1 << RSUP) : 0)
-                | (pNode->GetSubSup(LSUB) != NULL ? (1 << LSUB) : 0)
-                | (pNode->GetSubSup(LSUP) != NULL ? (1 << LSUP) : 0);
+    int flags = (pNode->GetSubSup(CSUB) != nullptr ? (1 << CSUB) : 0)
+                | (pNode->GetSubSup(CSUP) != nullptr ? (1 << CSUP) : 0)
+                | (pNode->GetSubSup(RSUB) != nullptr ? (1 << RSUB) : 0)
+                | (pNode->GetSubSup(RSUP) != nullptr ? (1 << RSUP) : 0)
+                | (pNode->GetSubSup(LSUB) != nullptr ? (1 << LSUB) : 0)
+                | (pNode->GetSubSup(LSUP) != nullptr ? (1 << LSUP) : 0);
     HandleSubSupScriptInternal(pNode, nLevel, flags);
 }
 
diff --git a/starmath/source/wordexportbase.hxx b/starmath/source/wordexportbase.hxx
index 059db4f08a20..b8aac113334a 100644
--- a/starmath/source/wordexportbase.hxx
+++ b/starmath/source/wordexportbase.hxx
@@ -27,7 +27,7 @@ protected:
     virtual void HandleVerticalStack( const SmNode* pNode, int nLevel ) = 0;
     virtual void HandleText( const SmNode* pNode, int nLevel ) = 0;
     void HandleMath( const SmNode* pNode, int nLevel );
-    virtual void HandleFractions( const SmNode* pNode, int nLevel, const char* type = NULL ) = 0;
+    virtual void HandleFractions( const SmNode* pNode, int nLevel, const char* type = nullptr ) = 0;
     void HandleUnaryOperation( const SmUnHorNode* pNode, int nLevel );
     void HandleBinaryOperation( const SmBinHorNode* pNode, int nLevel );
     virtual void HandleRoot( const SmRootNode* pNode, int nLevel ) = 0;