Get rid of NULLs in core/

core/fxge/apple/fx_apple_platform.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 "core/fxcrt/include/fx_system.h"
 #include "core/fxge/include/fx_ge.h"
 
 #if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
@@ skipping 13 matching lines @@
       static_cast<CApplePlatform*>(CFX_GEModule::Get()->GetPlatformData())
           ->m_quartz2d;
   m_pPlatformGraphics = quartz2d.createGraphics(m_pBitmap);
 }
 void CFX_AggDeviceDriver::DestroyPlatform() {
   CQuartz2D& quartz2d =
       static_cast<CApplePlatform*>(CFX_GEModule::Get()->GetPlatformData())
           ->m_quartz2d;
   if (m_pPlatformGraphics) {
     quartz2d.destroyGraphics(m_pPlatformGraphics);
-    m_pPlatformGraphics = NULL;
+    m_pPlatformGraphics = nullptr;
   }
 }
 void CFX_FaceCache::InitPlatform() {}
 void CFX_FaceCache::DestroyPlatform() {}
 CFX_GlyphBitmap* CFX_FaceCache::RenderGlyph_Nativetext(
     CFX_Font* pFont,
     uint32_t glyph_index,
     const CFX_Matrix* pMatrix,
     int dest_width,
     int anti_alias) {
-  return NULL;
+  return nullptr;
 }
 static FX_BOOL _CGDrawGlyphRun(CGContextRef pContext,
                                int nChars,
                                const FXTEXT_CHARPOS* pCharPos,
                                CFX_Font* pFont,
                                CFX_FontCache* pCache,
                                const CFX_Matrix* pObject2Device,
                                FX_FLOAT font_size,
                                uint32_t argb,
                                int alpha_flag,
@@ skipping 37 matching lines @@
   }
   if (bNegSize) {
     new_matrix.a = -new_matrix.a;
   } else {
     new_matrix.b = -new_matrix.b;
     new_matrix.d = -new_matrix.d;
   }
   quartz2d.setGraphicsTextMatrix(pContext, &new_matrix);
   return quartz2d.drawGraphicsString(pContext, pFont->GetPlatformFont(),
                                      font_size, glyph_indices, glyph_positions,
-                                     nChars, argb, NULL);
+                                     nChars, argb, nullptr);
 }
 static void _DoNothing(void* info, const void* data, size_t size) {}
 FX_BOOL CFX_AggDeviceDriver::DrawDeviceText(int nChars,
                                             const FXTEXT_CHARPOS* pCharPos,
                                             CFX_Font* pFont,
                                             CFX_FontCache* pCache,
                                             const CFX_Matrix* pObject2Device,
                                             FX_FLOAT font_size,
                                             uint32_t argb,
                                             int alpha_flag,
                                             void* pIccTransform) {
   if (!pFont) {
     return FALSE;
   }
   FX_BOOL bBold = pFont->IsBold();
   if (!bBold && pFont->GetSubstFont() &&
       pFont->GetSubstFont()->m_Weight >= 500 &&
       pFont->GetSubstFont()->m_Weight <= 600) {
     return FALSE;
   }
   for (int i = 0; i < nChars; i++) {
     if (pCharPos[i].m_bGlyphAdjust) {
       return FALSE;
     }
   }
   CGContextRef ctx = CGContextRef(m_pPlatformGraphics);
-  if (NULL == ctx) {
+  if (!ctx)
     return FALSE;
-  }
+
   CGContextSaveGState(ctx);
   CGContextSetTextDrawingMode(ctx, kCGTextFillClip);
   CGRect rect_cg;
-  CGImageRef pImageCG = NULL;
+  CGImageRef pImageCG = nullptr;
   if (m_pClipRgn) {
     rect_cg =
         CGRectMake(m_pClipRgn->GetBox().left, m_pClipRgn->GetBox().top,
                    m_pClipRgn->GetBox().Width(), m_pClipRgn->GetBox().Height());
     const CFX_DIBitmap* pClipMask = m_pClipRgn->GetMask();
     if (pClipMask) {
       CGDataProviderRef pClipMaskDataProvider = CGDataProviderCreateWithData(
-          NULL, pClipMask->GetBuffer(),
+          nullptr, pClipMask->GetBuffer(),
           pClipMask->GetPitch() * pClipMask->GetHeight(), _DoNothing);
       CGFloat decode_f[2] = {255.f, 0.f};
       pImageCG = CGImageMaskCreate(
           pClipMask->GetWidth(), pClipMask->GetHeight(), 8, 8,
           pClipMask->GetPitch(), pClipMaskDataProvider, decode_f, FALSE);
       CGDataProviderRelease(pClipMaskDataProvider);
     }
   } else {
     rect_cg = CGRectMake(0, 0, m_pBitmap->GetWidth(), m_pBitmap->GetHeight());
   }
@@ skipping 11 matching lines @@
   }
   CGContextRestoreGState(ctx);
   return ret;
 }
 void CFX_Font::ReleasePlatformResource() {
   if (m_pPlatformFont) {
     CQuartz2D& quartz2d =
         static_cast<CApplePlatform*>(CFX_GEModule::Get()->GetPlatformData())
             ->m_quartz2d;
     quartz2d.DestroyFont(m_pPlatformFont);
-    m_pPlatformFont = NULL;
+    m_pPlatformFont = nullptr;
   }
 }
 
 #endif  // _FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_