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

core/src/fpdfapi/fpdf_page/fpdf_page_func.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 <limits.h>
 
@@ skipping 189 matching lines @@
       }
     } else {
       int i = 0;
       while (_PDF_PSOpNames[i].name) {
         if (word == CFX_ByteStringC(_PDF_PSOpNames[i].name)) {
           m_Operators.Add((void*)_PDF_PSOpNames[i].op);
           break;
         }
         i++;
       }
-      if (_PDF_PSOpNames[i].name == NULL) {
+      if (!_PDF_PSOpNames[i].name) {
         FX_FLOAT* pd = FX_Alloc(FX_FLOAT, 1);
         *pd = FX_atof(word);
         m_Operators.Add((void*)PSOP_CONST);
         m_Operators.Add(pd);
       }
     }
   }
 }
 #define PI 3.1415926535897932384626433832795f
 FX_BOOL CPDF_PSEngine::DoOperator(PDF_PSOP op) {
@@ skipping 455 matching lines @@
 CPDF_ExpIntFunc::CPDF_ExpIntFunc() {
   m_pBeginValues = NULL;
   m_pEndValues = NULL;
 }
 CPDF_ExpIntFunc::~CPDF_ExpIntFunc() {
     FX_Free(m_pBeginValues);
     FX_Free(m_pEndValues);
 }
 FX_BOOL CPDF_ExpIntFunc::v_Init(CPDF_Object* pObj) {
   CPDF_Dictionary* pDict = pObj->GetDict();
-  if (pDict == NULL) {
+  if (!pDict) {
     return FALSE;
   }
   CPDF_Array* pArray0 = pDict->GetArray("C0");
   if (m_nOutputs == 0) {
     m_nOutputs = 1;
     if (pArray0) {
       m_nOutputs = pArray0->GetCount();
     }
   }
   CPDF_Array* pArray1 = pDict->GetArray("C1");
@@ skipping 109 matching lines @@
   }
   return TRUE;
 }
 FX_BOOL CPDF_StitchFunc::v_Call(FX_FLOAT* inputs, FX_FLOAT* outputs) const {
   FX_FLOAT input = inputs[0];
   size_t i;
   for (i = 0; i < m_pSubFunctions.size() - 1; i++)
     if (input < m_pBounds[i + 1]) {
       break;
     }
-  if (m_pSubFunctions[i] == NULL) {
+  if (!m_pSubFunctions[i]) {
     return FALSE;
   }
   input = PDF_Interpolate(input, m_pBounds[i], m_pBounds[i + 1],
                           m_pEncode[i * 2], m_pEncode[i * 2 + 1]);
   int nresults;
   m_pSubFunctions[i]->Call(&input, kRequiredNumInputs, outputs, nresults);
   return TRUE;
 }
 CPDF_Function* CPDF_Function::Load(CPDF_Object* pFuncObj) {
-  if (pFuncObj == NULL) {
+  if (!pFuncObj) {
     return NULL;
   }
   CPDF_Function* pFunc = NULL;
   int type;
   if (CPDF_Stream* pStream = pFuncObj->AsStream()) {
     type = pStream->GetDict()->GetInteger("FunctionType");
   } else if (CPDF_Dictionary* pDict = pFuncObj->AsDictionary()) {
     type = pDict->GetInteger("FunctionType");
   } else {
     return NULL;
@@ skipping 81 matching lines @@
     for (int i = 0; i < m_nOutputs; i++) {
       if (results[i] < m_pRanges[i * 2]) {
         results[i] = m_pRanges[i * 2];
       } else if (results[i] > m_pRanges[i * 2 + 1]) {
         results[i] = m_pRanges[i * 2 + 1];
       }
     }
   }
   return TRUE;
 }