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

fpdfsdk/src/formfiller/FFL_CBA_Fontmap.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 "fpdfsdk/include/formfiller/FFL_CBA_Fontmap.h"
 #include "fpdfsdk/include/formfiller/FormFiller.h"
 
 CBA_FontMap::CBA_FontMap(CPDFSDK_Annot* pAnnot,
@@ skipping 104 matching lines @@
 CPDF_Font* CBA_FontMap::FindResFontSameCharset(CPDF_Dictionary* pResDict,
                                                CFX_ByteString& sFontAlias,
                                                int32_t nCharset) {
   if (!pResDict)
     return NULL;
 
   CPDF_Document* pDocument = GetDocument();
   ASSERT(pDocument != NULL);
 
   CPDF_Dictionary* pFonts = pResDict->GetDict("Font");
-  if (pFonts == NULL)
+  if (!pFonts)
     return NULL;
 
   CPDF_Font* pFind = NULL;
 
   FX_POSITION pos = pFonts->GetStartPos();
   while (pos) {
     CPDF_Object* pObj = NULL;
     CFX_ByteString csKey;
     pObj = pFonts->GetNextElement(pos, csKey);
-    if (pObj == NULL)
+    if (!pObj)
       continue;
 
     CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
     if (!pElement)
       continue;
     if (pElement->GetString("Type") != "Font")
       continue;
 
     CPDF_Font* pFont = pDocument->LoadFont(pElement);
-    if (pFont == NULL)
+    if (!pFont)
       continue;
     const CFX_SubstFont* pSubst = pFont->GetSubstFont();
-    if (pSubst == NULL)
+    if (!pSubst)
       continue;
     if (pSubst->m_Charset == nCharset) {
       sFontAlias = csKey;
       pFind = pFont;
     }
   }
   return pFind;
 }
 
 void CBA_FontMap::AddedFont(CPDF_Font* pFont,
                             const CFX_ByteString& sFontAlias) {
   AddFontToAnnotDict(pFont, sFontAlias);
 }
 
 void CBA_FontMap::AddFontToAnnotDict(CPDF_Font* pFont,
                                      const CFX_ByteString& sAlias) {
   if (!pFont)
     return;
 
   ASSERT(m_pAnnotDict != NULL);
   ASSERT(m_pDocument != NULL);
 
   CPDF_Dictionary* pAPDict = m_pAnnotDict->GetDict("AP");
 
-  if (pAPDict == NULL) {
+  if (!pAPDict) {
     pAPDict = new CPDF_Dictionary;
     m_pAnnotDict->SetAt("AP", pAPDict);
   }
 
   // to avoid checkbox and radiobutton
   CPDF_Object* pObject = pAPDict->GetElement(m_sAPType);
   if (ToDictionary(pObject))
     return;
 
   CPDF_Stream* pStream = pAPDict->GetStream(m_sAPType);
-  if (pStream == NULL) {
+  if (!pStream) {
     pStream = new CPDF_Stream(NULL, 0, NULL);
     int32_t objnum = m_pDocument->AddIndirectObject(pStream);
     pAPDict->SetAtReference(m_sAPType, m_pDocument, objnum);
   }
 
   CPDF_Dictionary* pStreamDict = pStream->GetDict();
 
   if (!pStreamDict) {
     pStreamDict = new CPDF_Dictionary;
     pStream->InitStream(NULL, 0, pStreamDict);
@@ skipping 78 matching lines @@
 
   return pFontDict ? m_pDocument->LoadFont(pFontDict) : nullptr;
 }
 
 void CBA_FontMap::SetAPType(const CFX_ByteString& sAPType) {
   m_sAPType = sAPType;
 
   Reset();
   Initial();
 }