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

core/src/fxcodec/codec/fx_codec_jpeg.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 <setjmp.h>
 
 #include "codec_int.h"
 #include "core/include/fxcodec/fx_codec.h"
@@ skipping 64 matching lines @@
 static void _error_do_nothing2(j_common_ptr cinfo, char*) {}
 };
 #define JPEG_MARKER_EXIF (JPEG_APP0 + 1)
 #define JPEG_MARKER_ICC (JPEG_APP0 + 2)
 #define JPEG_MARKER_AUTHORTIME (JPEG_APP0 + 3)
 #define JPEG_MARKER_MAXSIZE 0xFFFF
 #define JPEG_OVERHEAD_LEN 14
 static FX_BOOL _JpegEmbedIccProfile(j_compress_ptr cinfo,
                                     const uint8_t* icc_buf_ptr,
                                     FX_DWORD icc_length) {
-  if (icc_buf_ptr == NULL || icc_length == 0) {
+  if (!icc_buf_ptr || icc_length == 0) {
     return FALSE;
   }
   FX_DWORD icc_segment_size = (JPEG_MARKER_MAXSIZE - 2 - JPEG_OVERHEAD_LEN);
   FX_DWORD icc_segment_num = (icc_length / icc_segment_size) + 1;
   if (icc_segment_num > 255) {
     return FALSE;
   }
   FX_DWORD icc_data_length =
       JPEG_OVERHEAD_LEN + (icc_segment_num > 1 ? icc_segment_size : icc_length);
   uint8_t* icc_data = FX_Alloc(uint8_t, icc_data_length);
@@ skipping 398 matching lines @@
 FX_DWORD CCodec_JpegDecoder::GetSrcOffset() {
   return (FX_DWORD)(m_SrcSize - src.bytes_in_buffer);
 }
 ICodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(
     const uint8_t* src_buf,
     FX_DWORD src_size,
     int width,
     int height,
     int nComps,
     FX_BOOL ColorTransform) {
-  if (src_buf == NULL || src_size == 0) {
+  if (!src_buf || src_size == 0) {
     return NULL;
   }
   CCodec_JpegDecoder* pDecoder = new CCodec_JpegDecoder;
   if (!pDecoder->Create(src_buf, src_size, width, height, nComps,
                         ColorTransform)) {
     delete pDecoder;
     return NULL;
   }
   return pDecoder;
 }
 FX_BOOL CCodec_JpegModule::LoadInfo(const uint8_t* src_buf,
                                     FX_DWORD src_size,
                                     int& width,
                                     int& height,
                                     int& num_components,
                                     int& bits_per_components,
                                     FX_BOOL& color_transform,
                                     uint8_t** icc_buf_ptr,
                                     FX_DWORD* icc_length) {
   return _JpegLoadInfo(src_buf, src_size, width, height, num_components,
                        bits_per_components, color_transform, icc_buf_ptr,
                        icc_length);
 }
 FX_BOOL CCodec_JpegModule::Encode(const CFX_DIBSource* pSource,
                                   uint8_t*& dest_buf,
                                   FX_STRSIZE& dest_size,
                                   int quality,
                                   const uint8_t* icc_buf,
                                   FX_DWORD icc_length) {
-  if (pSource->GetBPP() < 8 || pSource->GetPalette()) {
-    ASSERT(pSource->GetBPP() >= 8 && pSource->GetPalette() == NULL);
+  if (pSource->GetBPP() < 8 || pSource->GetPalette())
     return FALSE;
-  }
+
   _JpegEncode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length);
   return TRUE;
 }
 struct FXJPEG_Context {
   jmp_buf m_JumpMark;
   jpeg_decompress_struct m_Info;
   jpeg_error_mgr m_ErrMgr;
   jpeg_source_mgr m_SrcMgr;
   unsigned int m_SkipSize;
   void* (*m_AllocFunc)(unsigned int);
@@ skipping 109 matching lines @@
                                           uint8_t** avail_buf_ptr) {
   if (avail_buf_ptr) {
     *avail_buf_ptr = NULL;
     if (((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
       *avail_buf_ptr =
           (uint8_t*)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
     }
   }
   return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
 }