Get rid of most instance of 'foo == NULL'

core/src/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/include/fpdfapi/fpdf_pageobj.h"
 #include "core/include/fpdfdoc/fpdf_doc.h"
 #include "third_party/base/nonstd_unique_ptr.h"
 
@@ skipping 115 matching lines @@
   for (const auto& pair : m_APMap) {
     delete pair.second;
   }
   m_APMap.clear();
 }
 CFX_ByteString CPDF_Annot::GetSubType() const {
   return m_sSubtype;
 }
 
 void CPDF_Annot::GetRect(CPDF_Rect& rect) const {
-  if (m_pAnnotDict == NULL) {
+  if (!m_pAnnotDict) {
     return;
   }
   rect = m_pAnnotDict->GetRect("Rect");
   rect.Normalize();
 }
 
 FX_DWORD CPDF_Annot::GetFlags() const {
   return m_pAnnotDict->GetInteger("F");
 }
 
 CPDF_Stream* FPDFDOC_GetAnnotAP(CPDF_Dictionary* pAnnotDict,
                                 CPDF_Annot::AppearanceMode mode) {
   CPDF_Dictionary* pAP = pAnnotDict->GetDict("AP");
-  if (pAP == NULL) {
+  if (!pAP) {
     return NULL;
   }
   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";
 
@@ skipping 99 matching lines @@
   if (bPrinting && (annot_flags & ANNOTFLAG_PRINT) == 0) {
     return;
   }
   if (!bPrinting && (annot_flags & ANNOTFLAG_NOVIEW)) {
     return;
   }
   CPDF_Dictionary* pBS = m_pAnnotDict->GetDict("BS");
   char style_char;
   FX_FLOAT width;
   CPDF_Array* pDashArray = NULL;
-  if (pBS == NULL) {
+  if (!pBS) {
     CPDF_Array* pBorderArray = m_pAnnotDict->GetArray("Border");
     style_char = 'S';
     if (pBorderArray) {
       width = pBorderArray->GetNumber(2);
       if (pBorderArray->GetCount() == 4) {
         pDashArray = pBorderArray->GetArray(3);
-        if (pDashArray == NULL) {
+        if (!pDashArray) {
           return;
         }
         int nLen = pDashArray->GetCount();
         int i = 0;
         for (; i < nLen; ++i) {
           CPDF_Object* pObj = pDashArray->GetElementValue(i);
           if (pObj && pObj->GetInteger()) {
             break;
           }
         }
@@ skipping 50 matching lines @@
   CPDF_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);
 }