Get rid of NULLs in core/

core/fpdfdoc/doc_annot.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
@@ skipping 140 matching lines @@
 }
 
 uint32_t CPDF_Annot::GetFlags() const {
   return m_pAnnotDict->GetIntegerBy("F");
 }
 
 CPDF_Stream* FPDFDOC_GetAnnotAP(CPDF_Dictionary* pAnnotDict,
                                 CPDF_Annot::AppearanceMode mode) {
   CPDF_Dictionary* pAP = pAnnotDict->GetDictBy("AP");
   if (!pAP) {
-    return NULL;
+    return nullptr;
   }
   const FX_CHAR* ap_entry = "N";
   if (mode == CPDF_Annot::Down)
     ap_entry = "D";
   else if (mode == CPDF_Annot::Rollover)
     ap_entry = "R";
   if (!pAP->KeyExist(ap_entry))
     ap_entry = "N";
 
   CPDF_Object* psub = pAP->GetDirectObjectBy(ap_entry);
@@ skipping 36 matching lines @@
   return pNewForm;
 }
 
 static CPDF_Form* FPDFDOC_Annot_GetMatrix(const CPDF_Page* pPage,
                                           CPDF_Annot* pAnnot,
                                           CPDF_Annot::AppearanceMode mode,
                                           const CFX_Matrix* pUser2Device,
                                           CFX_Matrix& matrix) {
   CPDF_Form* pForm = pAnnot->GetAPForm(pPage, mode);
   if (!pForm) {
-    return NULL;
+    return nullptr;
   }
   CFX_FloatRect form_bbox = pForm->m_pFormDict->GetRectBy("BBox");
   CFX_Matrix form_matrix = pForm->m_pFormDict->GetMatrixBy("Matrix");
   form_matrix.TransformRect(form_bbox);
   CFX_FloatRect arect;
   pAnnot->GetRect(arect);
   matrix.MatchRect(arect, form_bbox);
   matrix.Concat(*pUser2Device);
   return pForm;
 }
@@ skipping 40 matching lines @@
                    (pOptions && (pOptions->m_Flags & RENDER_PRINTPREVIEW));
   if (bPrinting && (annot_flags & ANNOTFLAG_PRINT) == 0) {
     return;
   }
   if (!bPrinting && (annot_flags & ANNOTFLAG_NOVIEW)) {
     return;
   }
   CPDF_Dictionary* pBS = m_pAnnotDict->GetDictBy("BS");
   char style_char;
   FX_FLOAT width;
-  CPDF_Array* pDashArray = NULL;
+  CPDF_Array* pDashArray = nullptr;
   if (!pBS) {
     CPDF_Array* pBorderArray = m_pAnnotDict->GetArrayBy("Border");
     style_char = 'S';
     if (pBorderArray) {
       width = pBorderArray->GetNumberAt(2);
       if (pBorderArray->GetCount() == 4) {
         pDashArray = pBorderArray->GetArrayAt(3);
         if (!pDashArray) {
           return;
         }
@@ skipping 58 matching lines @@
   CFX_PathData path;
   width /= 2;
   path.AppendRect(rect.left + width, rect.bottom + width, rect.right - width,
                   rect.top - width);
   int fill_type = 0;
   if (pOptions && (pOptions->m_Flags & RENDER_NOPATHSMOOTH)) {
     fill_type |= FXFILL_NOPATHSMOOTH;
   }
   pDevice->DrawPath(&path, pUser2Device, &graph_state, argb, argb, fill_type);
 }