Get rid of NULLs in core/

core/fpdfapi/fpdf_font/cpdf_cidfont.cpp

 // Copyright 2016 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/fpdfapi/fpdf_font/cpdf_cidfont.h"
 
 #include "core/fpdfapi/fpdf_cmaps/cmap_int.h"
 #include "core/fpdfapi/fpdf_font/font_int.h"
@@ skipping 302 matching lines @@
   if (unicode < 0x80) {
     return static_cast<uint32_t>(unicode);
   }
   if (m_pCMap->m_Coding == CIDCODING_CID) {
     return 0;
   }
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
   uint8_t buffer[32];
   int ret =
       FXSYS_WideCharToMultiByte(g_CharsetCPs[m_pCMap->m_Coding], 0, &unicode, 1,
-                                (char*)buffer, 4, NULL, NULL);
+                                (char*)buffer, 4, nullptr, nullptr);
   if (ret == 1) {
     return buffer[0];
   }
   if (ret == 2) {
     return buffer[0] * 256 + buffer[1];
   }
 #else
   if (m_pCMap->m_pEmbedMap) {
     return EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset,
                                        unicode);
@@ skipping 262 matching lines @@
         index = vindex;
         if (pVertGlyph) {
           *pVertGlyph = TRUE;
         }
       }
       return index;
     }
     if (!m_Font.GetSubData()) {
       unsigned long length = 0;
       int error = FXFT_Load_Sfnt_Table(face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0,
-                                       NULL, &length);
+                                       nullptr, &length);
       if (!error) {
         m_Font.SetSubData(FX_Alloc(uint8_t, length));
       }
     }
     int error = FXFT_Load_Sfnt_Table(face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0,
-                                     m_Font.GetSubData(), NULL);
+                                     m_Font.GetSubData(), nullptr);
     if (!error && m_Font.GetSubData()) {
       m_pTTGSUBTable.reset(new CFX_CTTGSUBTable);
       m_pTTGSUBTable->LoadGSUBTable((FT_Bytes)m_Font.GetSubData());
       uint32_t vindex = 0;
       m_pTTGSUBTable->GetVerticalGlyph(index, &vindex);
       if (vindex) {
         index = vindex;
         if (pVertGlyph) {
           *pVertGlyph = TRUE;
         }
@@ skipping 48 matching lines @@
       FX_BOOL bMacRoman = FALSE;
       if (!bMSUnicode) {
         bMacRoman = FT_UseTTCharmap(face, 1, 0);
       }
       iBaseEncoding = PDFFONT_ENCODING_STANDARD;
       if (bMSUnicode) {
         iBaseEncoding = PDFFONT_ENCODING_WINANSI;
       } else if (bMacRoman) {
         iBaseEncoding = PDFFONT_ENCODING_MACROMAN;
       }
-      const FX_CHAR* name = GetAdobeCharName(iBaseEncoding, NULL, charcode);
+      const FX_CHAR* name = GetAdobeCharName(iBaseEncoding, nullptr, charcode);
       if (!name) {
         return charcode == 0 ? -1 : (int)charcode;
       }
       uint16_t unicode = PDF_UnicodeFromAdobeName(name);
       if (unicode) {
         if (bMSUnicode) {
           index = FXFT_Get_Char_Index(face, unicode);
         } else if (bMacRoman) {
           uint32_t maccode =
               FT_CharCodeFromUnicode(FXFT_ENCODING_APPLE_ROMAN, unicode);
@@ skipping 194 matching lines @@
 
 const uint8_t* CPDF_CIDFont::GetCIDTransform(uint16_t CID) const {
   if (m_Charset != CIDSET_JAPAN1 || m_pFontFile)
     return nullptr;
 
   const struct CIDTransform* found = (const struct CIDTransform*)FXSYS_bsearch(
       &CID, g_Japan1_VertCIDs, FX_ArraySize(g_Japan1_VertCIDs),
       sizeof(g_Japan1_VertCIDs[0]), CompareCIDTransform);
   return found ? &found->a : nullptr;
 }