Use string pools in some dictionaries

core/fpdfapi/fpdf_page/fpdf_page_parser_old.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/fpdfapi/fpdf_page/pageint.h"
 
 #include <limits.h>
 
@@ skipping 23 matching lines @@
 #include "core/fxge/include/cfx_renderdevice.h"
 
 namespace {
 
 const uint32_t kMaxNestedArrayLevel = 512;
 const uint32_t kMaxWordBuffer = 256;
 const FX_STRSIZE kMaxStringLength = 32767;
 
 }  // namespace
 
-CPDF_StreamParser::CPDF_StreamParser(const uint8_t* pData, uint32_t dwSize) {
-  m_pBuf = pData;
-  m_Size = dwSize;
-  m_Pos = 0;
-  m_pLastObj = nullptr;
-}
+CPDF_StreamParser::CPDF_StreamParser(const uint8_t* pData, uint32_t dwSize)
+    : m_pBuf(pData),
+      m_Size(dwSize),
+      m_Pos(0),
+      m_pLastObj(nullptr),
+      m_pPool(nullptr) {}
+
+CPDF_StreamParser::CPDF_StreamParser(const uint8_t* pData,
+                                     uint32_t dwSize,
+                                     CFX_ByteStringPool* pPool)
+    : m_pBuf(pData),
+      m_Size(dwSize),
+      m_Pos(0),
+      m_pLastObj(nullptr),
+      m_pPool(pPool) {}
 
 CPDF_StreamParser::~CPDF_StreamParser() {
   if (m_pLastObj) {
     m_pLastObj->Release();
   }
 }
 
 uint32_t DecodeAllScanlines(CCodec_ScanlineDecoder* pDecoder,
                             uint8_t*& dest_buf,
                             uint32_t& dest_size) {
@@ skipping 269 matching lines @@
   if (!m_WordSize)
     return nullptr;
 
   if (bIsNumber) {
     m_WordBuffer[m_WordSize] = 0;
     return new CPDF_Number(CFX_ByteStringC(m_WordBuffer, m_WordSize));
   }
 
   int first_char = m_WordBuffer[0];
   if (first_char == '/') {
-    return new CPDF_Name(
-        PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1)));
+    CFX_ByteString name =
+        PDF_NameDecode(CFX_ByteStringC(m_WordBuffer + 1, m_WordSize - 1));
+    return new CPDF_Name(m_pPool ? m_pPool->Intern(name) : name);
   }
 
-  if (first_char == '(')
-    return new CPDF_String(ReadString(), FALSE);
+  if (first_char == '(') {
+    CFX_ByteString str = ReadString();
+    return new CPDF_String(m_pPool ? m_pPool->Intern(str) : str, FALSE);
+  }
 
   if (first_char == '<') {
     if (m_WordSize == 1)
       return new CPDF_String(ReadHexString(), TRUE);
 
-    CPDF_Dictionary* pDict = new CPDF_Dictionary;
+    CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pPool);
     while (1) {
       GetNextWord(bIsNumber);
       if (m_WordSize == 2 && m_WordBuffer[0] == '>')
         break;
 
       if (!m_WordSize || m_WordBuffer[0] != '/') {
         pDict->Release();
         return nullptr;
       }
 
@@ skipping 456 matching lines @@
       }
       m_Status = Done;
       return;
     }
     steps++;
     if (pPause && pPause->NeedToPauseNow()) {
       break;
     }
   }
 }