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

core/src/fpdfapi/fpdf_page/fpdf_page_pattern.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 "pageint.h"
 
 #include "core/include/fpdfapi/fpdf_page.h"
 
@@ skipping 111 matching lines @@
   m_pCountedCS = NULL;
   m_nFuncs = 0;
 }
 
 FX_BOOL CPDF_ShadingPattern::Load() {
   if (m_ShadingType != kInvalidShading)
     return TRUE;
 
   CPDF_Dictionary* pShadingDict =
       m_pShadingObj ? m_pShadingObj->GetDict() : NULL;
-  if (pShadingDict == NULL) {
+  if (!pShadingDict) {
     return FALSE;
   }
   if (m_nFuncs) {
     for (int i = 0; i < m_nFuncs; i++)
       delete m_pFunctions[i];
     m_nFuncs = 0;
   }
   CPDF_Object* pFunc = pShadingDict->GetElementValue("Function");
   if (pFunc) {
     if (CPDF_Array* pArray = pFunc->AsArray()) {
       m_nFuncs = std::min<int>(pArray->GetCount(), 4);
 
       for (int i = 0; i < m_nFuncs; i++) {
         m_pFunctions[i] = CPDF_Function::Load(pArray->GetElementValue(i));
       }
     } else {
       m_pFunctions[0] = CPDF_Function::Load(pFunc);
       m_nFuncs = 1;
     }
   }
   CPDF_Object* pCSObj = pShadingDict->GetElementValue("ColorSpace");
-  if (pCSObj == NULL) {
+  if (!pCSObj) {
     return FALSE;
   }
   CPDF_DocPageData* pDocPageData = m_pDocument->GetPageData();
   m_pCS = pDocPageData->GetColorSpace(pCSObj, NULL);
   if (m_pCS) {
     m_pCountedCS = pDocPageData->FindColorSpacePtr(m_pCS->GetArray());
   }
 
   m_ShadingType = ToShadingType(pShadingDict->GetInteger("ShadingType"));
 
@@ skipping 27 matching lines @@
   if (nComps > 8) {
     return FALSE;
   }
   m_nComps = nFuncs ? 1 : nComps;
   if (((int)m_nComps < 0) || m_nComps > 8) {
     return FALSE;
   }
   m_CoordMax = m_nCoordBits == 32 ? -1 : (1 << m_nCoordBits) - 1;
   m_CompMax = (1 << m_nCompBits) - 1;
   CPDF_Array* pDecode = pDict->GetArray("Decode");
-  if (pDecode == NULL || pDecode->GetCount() != 4 + m_nComps * 2) {
+  if (!pDecode || pDecode->GetCount() != 4 + m_nComps * 2) {
     return FALSE;
   }
   m_xmin = pDecode->GetNumber(0);
   m_xmax = pDecode->GetNumber(1);
   m_ymin = pDecode->GetNumber(2);
   m_ymax = pDecode->GetNumber(3);
   for (FX_DWORD i = 0; i < m_nComps; i++) {
     m_ColorMin[i] = pDecode->GetNumber(i * 2 + 4);
     m_ColorMax[i] = pDecode->GetNumber(i * 2 + 5);
   }
@@ skipping 111 matching lines @@
       }
     }
     stream.m_BitStream.SkipBits(stream.m_nComps * stream.m_nCompBits *
                                 color_count);
     if (bGouraud)
       stream.m_BitStream.ByteAlign();
   }
   rect.Transform(pMatrix);
   return rect;
 }