Convert NULLs to nullptrs in fpdf_parser_decode.cpp

core/src/fpdfapi/fpdf_parser/fpdf_parser_decode.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 <limits.h>
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
@@ skipping 31 matching lines @@
     0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9,
     0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x00f0, 0x00f1, 0x00f2,
     0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7, 0x00f8, 0x00f9, 0x00fa, 0x00fb,
     0x00fc, 0x00fd, 0x00fe, 0x00ff};
 
 FX_DWORD A85Decode(const uint8_t* src_buf,
                    FX_DWORD src_size,
                    uint8_t*& dest_buf,
                    FX_DWORD& dest_size) {
   dest_size = 0;
-  dest_buf = NULL;
+  dest_buf = nullptr;
   if (src_size == 0) {
     return 0;
   }
   FX_DWORD zcount = 0;
   FX_DWORD pos = 0;
   while (pos < src_size) {
     uint8_t ch = src_buf[pos];
     if (ch < '!' && ch != '\n' && ch != '\r' && ch != ' ' && ch != '\t') {
       break;
     }
@@ skipping 171 matching lines @@
     K = pParams->GetIntegerBy("K");
     EndOfLine = pParams->GetIntegerBy("EndOfLine");
     ByteAlign = pParams->GetIntegerBy("EncodedByteAlign");
     BlackIs1 = pParams->GetIntegerBy("BlackIs1");
     Columns = pParams->GetIntegerBy("Columns", 1728);
     Rows = pParams->GetIntegerBy("Rows");
     if (Rows > USHRT_MAX) {
       Rows = 0;
     }
     if (Columns <= 0 || Rows < 0 || Columns > USHRT_MAX || Rows > USHRT_MAX) {
-      return NULL;
+      return nullptr;
     }
   }
   return CPDF_ModuleMgr::Get()->GetFaxModule()->CreateDecoder(
       src_buf, src_size, width, height, K, EndOfLine, ByteAlign, BlackIs1,
       Columns, Rows);
 }
 static FX_BOOL CheckFlateDecodeParams(int Colors,
                                       int BitsPerComponent,
                                       int Columns) {
   if (Columns < 0) {
@@ skipping 23 matching lines @@
     int bpc,
     const CPDF_Dictionary* pParams) {
   int predictor = 0;
   int Colors = 0, BitsPerComponent = 0, Columns = 0;
   if (pParams) {
     predictor = pParams->GetIntegerBy("Predictor");
     Colors = pParams->GetIntegerBy("Colors", 1);
     BitsPerComponent = pParams->GetIntegerBy("BitsPerComponent", 8);
     Columns = pParams->GetIntegerBy("Columns", 1);
     if (!CheckFlateDecodeParams(Colors, BitsPerComponent, Columns)) {
-      return NULL;
+      return nullptr;
     }
   }
   return CPDF_ModuleMgr::Get()->GetFlateModule()->CreateDecoder(
       src_buf, src_size, width, height, nComps, bpc, predictor, Colors,
       BitsPerComponent, Columns);
 }
 FX_DWORD FPDFAPI_FlateOrLZWDecode(FX_BOOL bLZW,
                                   const uint8_t* src_buf,
                                   FX_DWORD src_size,
                                   CPDF_Dictionary* pParams,
@@ skipping 47 matching lines @@
   } else {
     DecoderList.Add(pDecoder->GetConstString());
     ParamList.Add(pParams ? pParams->GetDict() : nullptr);
   }
   uint8_t* last_buf = (uint8_t*)src_buf;
   FX_DWORD last_size = src_size;
   for (int i = 0; i < DecoderList.GetSize(); i++) {
     int estimated_size =
         i == DecoderList.GetSize() - 1 ? last_estimated_size : 0;
     CFX_ByteString decoder = DecoderList[i];
-    // Use ToDictionary here because we can push NULL into the ParamList.
+    // Use ToDictionary here because we can push nullptr into the ParamList.
     CPDF_Dictionary* pParam = ToDictionary(ParamList[i]);
     uint8_t* new_buf = nullptr;
     FX_DWORD new_size = (FX_DWORD)-1;
     int offset = -1;
     if (decoder == "FlateDecode" || decoder == "Fl") {
       if (bImageAcc && i == DecoderList.GetSize() - 1) {
         ImageEncoding = "FlateDecode";
         dest_buf = (uint8_t*)last_buf;
         dest_size = last_size;
         pImageParms = pParam;
@@ skipping 199 matching lines @@
                      FX_DWORD src_size,
                      uint8_t*& dest_buf,
                      FX_DWORD& dest_size) {
   CCodec_ModuleMgr* pEncoders = CPDF_ModuleMgr::Get()->GetCodecModule();
   if (pEncoders) {
     return pEncoders->GetFlateModule()->FlateOrLZWDecode(
         FALSE, src_buf, src_size, FALSE, 0, 0, 0, 0, 0, dest_buf, dest_size);
   }
   return 0;
 }