Use std::unordered_map for CFDE_CSSStyleSheet::m_StringCache

xfa/fde/css/fde_cssdatatable.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/fde/css/fde_cssdatatable.h"
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "xfa/fgas/crt/fgas_algorithm.h"
@@ skipping 539 matching lines @@
     {0xF6EFFF31, 0xff008000},
 };
 static const FDE_CSSPERSUDOTABLE g_FDE_CSSPersudoType[] = {
     {FDE_CSSPERSUDO_After, L":after", 0x16EE1FEC},
     {FDE_CSSPERSUDO_Before, L":before", 0x7DCDDE2D},
 };
 FDE_LPCCSSPERSUDOTABLE FDE_GetCSSPersudoByEnum(FDE_CSSPERSUDO ePersudo) {
   return (ePersudo < FDE_CSSPERSUDO_NONE) ? (g_FDE_CSSPersudoType + ePersudo)
                                           : NULL;
 }
-FDE_LPCCSSPROPERTYTABLE FDE_GetCSSPropertyByName(
+const FDE_CSSPROPERTYTABLE* FDE_GetCSSPropertyByName(
     const CFX_WideStringC& wsName) {
   ASSERT(!wsName.IsEmpty());
   uint32_t dwHash = FX_HashCode_GetW(wsName, true);
   int32_t iEnd = FDE_CSSPROPERTY_MAX - 1;
   int32_t iMid, iStart = 0;
   uint32_t dwMid;
   do {
     iMid = (iStart + iEnd) / 2;
     dwMid = g_FDE_CSSProperties[iMid].dwHash;
     if (dwHash == dwMid) {
       return g_FDE_CSSProperties + iMid;
     } else if (dwHash > dwMid) {
       iStart = iMid + 1;
     } else {
       iEnd = iMid - 1;
     }
   } while (iStart <= iEnd);
   return NULL;
 }
-FDE_LPCCSSPROPERTYTABLE FDE_GetCSSPropertyByEnum(FDE_CSSPROPERTY eName) {
+const FDE_CSSPROPERTYTABLE* FDE_GetCSSPropertyByEnum(FDE_CSSPROPERTY eName) {
   return (eName < FDE_CSSPROPERTY_MAX) ? (g_FDE_CSSProperties + eName) : NULL;
 }
-FDE_LPCCSSPROPERTYVALUETABLE FDE_GetCSSPropertyValueByName(
+const FDE_CSSPROPERTYVALUETABLE* FDE_GetCSSPropertyValueByName(
     const CFX_WideStringC& wsName) {
   ASSERT(!wsName.IsEmpty());
   uint32_t dwHash = FX_HashCode_GetW(wsName, true);
   int32_t iEnd = FDE_CSSPROPERTYVALUE_MAX - 1;
   int32_t iMid, iStart = 0;
   uint32_t dwMid;
   do {
     iMid = (iStart + iEnd) / 2;
     dwMid = g_FDE_CSSPropertyValues[iMid].dwHash;
     if (dwHash == dwMid) {
       return g_FDE_CSSPropertyValues + iMid;
     } else if (dwHash > dwMid) {
       iStart = iMid + 1;
     } else {
       iEnd = iMid - 1;
     }
   } while (iStart <= iEnd);
   return NULL;
 }
-FDE_LPCCSSPROPERTYVALUETABLE FDE_GetCSSPropertyValueByEnum(
+const FDE_CSSPROPERTYVALUETABLE* FDE_GetCSSPropertyValueByEnum(
     FDE_CSSPROPERTYVALUE eName) {
   return (eName < FDE_CSSPROPERTYVALUE_MAX) ? (g_FDE_CSSPropertyValues + eName)
                                             : NULL;
 }
 FDE_LPCCSSMEDIATYPETABLE FDE_GetCSSMediaTypeByName(
     const CFX_WideStringC& wsName) {
   ASSERT(!wsName.IsEmpty());
   uint16_t wHash = FX_HashCode_GetW(wsName, true);
   int32_t iEnd =
       sizeof(g_FDE_CSSMediaTypes) / sizeof(FDE_CSSMEDIATYPETABLE) - 1;
@@ skipping 266 matching lines @@
     }
     while (iBracketCount > 0 && m_pCur < m_pEnd) {
       if (*m_pCur == ')') {
         iBracketCount--;
       }
       m_pCur++;
     }
   }
   return m_pCur - pStart;
 }