Use smart pointers for class owned pointers in xfa/fxfa

xfa/fxfa/parser/xfa_localemgr.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 "xfa/fxfa/parser/xfa_localemgr.h"
 
+#include <memory>
+#include <utility>
+
 #include "core/fxcodec/include/fx_codec.h"
 #include "core/fxcrt/include/fx_xml.h"
 #include "core/fxge/include/cfx_gemodule.h"
 #include "xfa/fxfa/parser/cxfa_document.h"
 #include "xfa/fxfa/parser/xfa_locale.h"
 #include "xfa/fxfa/parser/xfa_object.h"
 #include "xfa/fxfa/parser/xfa_utils.h"
 
 const uint8_t g_enUS_Locale[] = {
     0x78, 0x9C, 0x95, 0x56, 0xD1, 0x6E, 0x9B, 0x30, 0x14, 0x7D, 0x9F, 0xB4,
@@ skipping 1003 matching lines @@
     0xA7, 0x98, 0x4E, 0xD0, 0x0C, 0x8D, 0x18, 0x39, 0x84, 0x07, 0xC4, 0xA2,
     0x1A, 0xA6, 0xA8, 0x62, 0xAA, 0x19, 0x8C, 0x59, 0x95, 0x54, 0x31, 0x5A,
     0xD2, 0xFE, 0x4A, 0x59, 0xC0, 0x55, 0x8A, 0xB7, 0x72, 0x29, 0xB3, 0x54,
     0xAE, 0xC2, 0x23, 0x96, 0x47, 0x59, 0xAE, 0xCB, 0x5A, 0x06, 0x61, 0x91,
     0xD8, 0xD6, 0x86, 0x8C, 0xE6, 0x89, 0x59, 0xD7, 0x14, 0x9E, 0xD3, 0xD4,
     0xB3, 0xC7, 0x48, 0xCA, 0x27, 0x43, 0x01, 0x94, 0x3A, 0x09, 0xC8, 0xE5,
     0xDC, 0xA3, 0x81, 0x5B, 0xE3, 0x59, 0xA2, 0x27, 0xB9, 0xB4, 0x0A, 0x19,
     0x89, 0x26, 0xB5, 0x2C, 0xA3, 0xB6, 0x4E, 0x5C, 0xA6, 0x17, 0xA4, 0x7B,
     0xB3, 0x85, 0xFA, 0x59, 0x2A, 0x7A, 0xFF, 0x3D, 0xC4, 0x3F, 0xDE, 0xCB,
     0x8B, 0xC4};
+
+// TODO(weili): Change this function to return std::unique_ptr type.
 static IFX_Locale* XFA_GetLocaleFromBuffer(const uint8_t* pBuf, int nBufLen) {
   if (!pBuf || nBufLen <= 0) {
     return nullptr;
   }
   CFX_GEModule* pGeModule = CFX_GEModule::Get();
   if (!pGeModule) {
     return nullptr;
   }
   CCodec_ModuleMgr* pCodecMgr = pGeModule->GetCodecModule();
   if (!pCodecMgr) {
     return nullptr;
   }
-  CXML_Element* pLocale = nullptr;
+  std::unique_ptr<CXML_Element> pLocale;
   uint8_t* pOut = nullptr;
   uint32_t dwSize;
   pCodecMgr->GetFlateModule()->FlateOrLZWDecode(FALSE, pBuf, nBufLen, TRUE, 0,
                                                 0, 0, 0, 0, pOut, dwSize);
   if (pOut) {
-    pLocale = CXML_Element::Parse(pOut, dwSize);
+    pLocale.reset(CXML_Element::Parse(pOut, dwSize));
     FX_Free(pOut);
   }
-  if (pLocale) {
-    return new CXFA_XMLLocale(pLocale);
-  }
-  return nullptr;
+  return pLocale ? new CXFA_XMLLocale(std::move(pLocale)) : nullptr;
 }
+
 static uint16_t XFA_GetLanguage(CFX_WideString wsLanguage) {
   uint16_t dwLangueID = XFA_LANGID_en_US;
   if (wsLanguage.GetLength() < 2) {
     return dwLangueID;
   }
   wsLanguage.MakeLower();
   uint32_t dwIDFirst = wsLanguage.GetAt(0) << 8 | wsLanguage.GetAt(1);
   uint32_t dwIDSecond = wsLanguage.GetLength() >= 5
                             ? wsLanguage.GetAt(3) << 8 | wsLanguage.GetAt(4)
                             : 0;
@@ skipping 232 matching lines @@
   m_tz.tzMinute = (int8_t)((FXSYS_abs((int)timezone) % 3600) / 60);
 #endif
 }
 CXFA_TimeZoneProvider::~CXFA_TimeZoneProvider() {}
 void CXFA_TimeZoneProvider::SetTimeZone(FX_TIMEZONE& tz) {
   m_tz = tz;
 }
 void CXFA_TimeZoneProvider::GetTimeZone(FX_TIMEZONE& tz) {
   tz = m_tz;
 }