Get rid of NULLs in fpdfsdk/

fpdfsdk/formfiller/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/formfiller/cba_fontmap.h"
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_simple_parser.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
 #include "fpdfsdk/include/fsdk_baseannot.h"
 
 CBA_FontMap::CBA_FontMap(CPDFSDK_Annot* pAnnot,
                          CFX_SystemHandler* pSystemHandler)
     : CPWL_FontMap(pSystemHandler),
-      m_pDocument(NULL),
-      m_pAnnotDict(NULL),
-      m_pDefaultFont(NULL),
+      m_pDocument(nullptr),
+      m_pAnnotDict(nullptr),
+      m_pDefaultFont(nullptr),
       m_sAPType("N") {
   CPDF_Page* pPage = pAnnot->GetPDFPage();
 
   m_pDocument = pPage->m_pDocument;
   m_pAnnotDict = pAnnot->GetPDFAnnot()->GetAnnotDict();
   Initialize();
 }
 
 CBA_FontMap::~CBA_FontMap() {}
 
 void CBA_FontMap::Reset() {
   Empty();
-  m_pDefaultFont = NULL;
+  m_pDefaultFont = nullptr;
   m_sDefaultFontName = "";
 }
 
 void CBA_FontMap::Initialize() {
   int32_t nCharset = DEFAULT_CHARSET;
 
   if (!m_pDefaultFont) {
     m_pDefaultFont = GetAnnotDefaultFont(m_sDefaultFontName);
     if (m_pDefaultFont) {
       if (const CFX_SubstFont* pSubstFont = m_pDefaultFont->GetSubstFont()) {
@@ skipping 31 matching lines @@
     nCharset = pSubstFont->m_Charset;
   AddFontData(m_pDefaultFont, m_sDefaultFontName, nCharset);
 }
 
 CPDF_Font* CBA_FontMap::FindFontSameCharset(CFX_ByteString& sFontAlias,
                                             int32_t nCharset) {
   if (m_pAnnotDict->GetStringBy("Subtype") == "Widget") {
     CPDF_Document* pDocument = GetDocument();
     CPDF_Dictionary* pRootDict = pDocument->GetRoot();
     if (!pRootDict)
-      return NULL;
+      return nullptr;
 
     CPDF_Dictionary* pAcroFormDict = pRootDict->GetDictBy("AcroForm");
     if (!pAcroFormDict)
-      return NULL;
+      return nullptr;
 
     CPDF_Dictionary* pDRDict = pAcroFormDict->GetDictBy("DR");
     if (!pDRDict)
-      return NULL;
+      return nullptr;
 
     return FindResFontSameCharset(pDRDict, sFontAlias, nCharset);
   }
 
-  return NULL;
+  return nullptr;
 }
 
 CPDF_Document* CBA_FontMap::GetDocument() {
   return m_pDocument;
 }
 
 CPDF_Font* CBA_FontMap::FindResFontSameCharset(CPDF_Dictionary* pResDict,
                                                CFX_ByteString& sFontAlias,
                                                int32_t nCharset) {
   if (!pResDict)
-    return NULL;
+    return nullptr;
 
   CPDF_Dictionary* pFonts = pResDict->GetDictBy("Font");
   if (!pFonts)
-    return NULL;
+    return nullptr;
 
   CPDF_Document* pDocument = GetDocument();
-  CPDF_Font* pFind = NULL;
+  CPDF_Font* pFind = nullptr;
   for (const auto& it : *pFonts) {
     const CFX_ByteString& csKey = it.first;
     CPDF_Object* pObj = it.second;
     if (!pObj)
       continue;
 
     CPDF_Dictionary* pElement = ToDictionary(pObj->GetDirect());
     if (!pElement)
       continue;
     if (pElement->GetStringBy("Type") != "Font")
@@ skipping 30 matching lines @@
     m_pAnnotDict->SetAt("AP", pAPDict);
   }
 
   // to avoid checkbox and radiobutton
   CPDF_Object* pObject = pAPDict->GetObjectBy(m_sAPType);
   if (ToDictionary(pObject))
     return;
 
   CPDF_Stream* pStream = pAPDict->GetStreamBy(m_sAPType);
   if (!pStream) {
-    pStream = new CPDF_Stream(NULL, 0, NULL);
+    pStream = new CPDF_Stream(nullptr, 0, nullptr);
     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);
+    pStream->InitStream(nullptr, 0, pStreamDict);
   }
 
   if (pStreamDict) {
     CPDF_Dictionary* pStreamResList = pStreamDict->GetDictBy("Resources");
     if (!pStreamResList) {
       pStreamResList = new CPDF_Dictionary();
       pStreamDict->SetAt("Resources", pStreamResList);
     }
 
     if (pStreamResList) {
       CPDF_Dictionary* pStreamResFontList = pStreamResList->GetDictBy("Font");
       if (!pStreamResFontList) {
         pStreamResFontList = new CPDF_Dictionary;
         int32_t objnum = m_pDocument->AddIndirectObject(pStreamResFontList);
         pStreamResList->SetAtReference("Font", m_pDocument, objnum);
       }
       if (!pStreamResFontList->KeyExist(sAlias))
         pStreamResFontList->SetAtReference(sAlias, m_pDocument,
                                            pFont->GetFontDict());
     }
   }
 }
 
 CPDF_Font* CBA_FontMap::GetAnnotDefaultFont(CFX_ByteString& sAlias) {
-  CPDF_Dictionary* pAcroFormDict = NULL;
+  CPDF_Dictionary* pAcroFormDict = nullptr;
   const bool bWidget = (m_pAnnotDict->GetStringBy("Subtype") == "Widget");
   if (bWidget) {
     if (CPDF_Dictionary* pRootDict = m_pDocument->GetRoot())
       pAcroFormDict = pRootDict->GetDictBy("AcroForm");
   }
 
   CFX_ByteString sDA;
   CPDF_Object* pObj = FPDF_GetFieldAttr(m_pAnnotDict, "DA");
   if (pObj)
     sDA = pObj->GetString();
 
   if (bWidget) {
     if (sDA.IsEmpty()) {
       pObj = FPDF_GetFieldAttr(pAcroFormDict, "DA");
       sDA = pObj ? pObj->GetString() : CFX_ByteString();
     }
   }
 
-  CPDF_Dictionary* pFontDict = NULL;
+  CPDF_Dictionary* pFontDict = nullptr;
 
   if (!sDA.IsEmpty()) {
     CPDF_SimpleParser syntax(sDA.AsStringC());
     syntax.FindTagParamFromStart("Tf", 2);
     CFX_ByteString sFontName(syntax.GetWord());
     sAlias = PDF_NameDecode(sFontName).Mid(1);
 
     if (CPDF_Dictionary* pDRDict = m_pAnnotDict->GetDictBy("DR"))
       if (CPDF_Dictionary* pDRFontDict = pDRDict->GetDictBy("Font"))
         pFontDict = pDRFontDict->GetDictBy(sAlias);
@@ skipping 20 matching lines @@
 
   return pFontDict ? m_pDocument->LoadFont(pFontDict) : nullptr;
 }
 
 void CBA_FontMap::SetAPType(const CFX_ByteString& sAPType) {
   m_sAPType = sAPType;
 
   Reset();
   Initialize();
 }