runtime/PropertyNameArray.h

   1 /*
   2  *  Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
   3  *
   4  *  This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  *  This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU Library General Public License
  15  *  along with this library; see the file COPYING.LIB.  If not, write to
  16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  *  Boston, MA 02110-1301, USA.
  18  *
  19  */
  20
  21 #ifndef PropertyNameArray_h
  22 #define PropertyNameArray_h
  23
  24 #include "CallFrame.h"
  25 #include "Identifier.h"
  26 #include "Structure.h"
  27 #include <wtf/HashSet.h>
  28 #include <wtf/Vector.h>
  29
  30 namespace JSC {
  31
  32     class PropertyNameArrayData : public RefCounted<PropertyNameArrayData> {
  33     public:
  34         typedef Vector<Identifier, 20> PropertyNameVector;
  35         typedef PropertyNameVector::const_iterator const_iterator;
  36
  37         static PassRefPtr<PropertyNameArrayData> create() { return adoptRef(new PropertyNameArrayData); }
  38
  39         const_iterator begin() const { return m_propertyNameVector.begin(); }
  40         const_iterator end() const { return m_propertyNameVector.end(); }
  41
  42         PropertyNameVector& propertyNameVector() { return m_propertyNameVector; }
  43
  44         void setCachedStructure(Structure* structure) { m_cachedStructure = structure; }
  45         Structure* cachedStructure() const { return m_cachedStructure; }
  46
  47         void setCachedPrototypeChain(PassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; }
  48         StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); }
  49
  50     private:
  51         PropertyNameArrayData()
  52             : m_cachedStructure(0)
  53         {
  54         }
  55
  56         PropertyNameVector m_propertyNameVector;
  57         Structure* m_cachedStructure;
  58         RefPtr<StructureChain> m_cachedPrototypeChain;
  59     };
  60
  61     class PropertyNameArray {
  62     public:
  63         typedef PropertyNameArrayData::const_iterator const_iterator;
  64
  65         PropertyNameArray(JSGlobalData* globalData)
  66             : m_data(PropertyNameArrayData::create())
  67             , m_globalData(globalData)
  68             , m_shouldCache(true)
  69         {
  70         }
  71
  72         PropertyNameArray(ExecState* exec)
  73             : m_data(PropertyNameArrayData::create())
  74             , m_globalData(&exec->globalData())
  75             , m_shouldCache(true)
  76         {
  77         }
  78
  79         JSGlobalData* globalData() { return m_globalData; }
  80
  81         void add(const Identifier& identifier) { add(identifier.ustring().rep()); }
  82         void add(UString::Rep*);
  83         void addKnownUnique(UString::Rep* identifier) { m_data->propertyNameVector().append(Identifier(m_globalData, identifier)); }
  84
  85         size_t size() const { return m_data->propertyNameVector().size(); }
  86
  87         Identifier& operator[](unsigned i) { return m_data->propertyNameVector()[i]; }
  88         const Identifier& operator[](unsigned i) const { return m_data->propertyNameVector()[i]; }
  89
  90         const_iterator begin() const { return m_data->begin(); }
  91         const_iterator end() const { return m_data->end(); }
  92
  93         void setData(PassRefPtr<PropertyNameArrayData> data) { m_data = data; }
  94         PropertyNameArrayData* data() { return m_data.get(); }
  95
  96         PassRefPtr<PropertyNameArrayData> releaseData() { return m_data.release(); }
  97
  98         void setShouldCache(bool shouldCache) { m_shouldCache = shouldCache; }
  99         bool shouldCache() const { return m_shouldCache; }
 100
 101     private:
 102         typedef HashSet<UString::Rep*, PtrHash<UString::Rep*> > IdentifierSet;
 103
 104         RefPtr<PropertyNameArrayData> m_data;
 105         IdentifierSet m_set;
 106         JSGlobalData* m_globalData;
 107         bool m_shouldCache;
 108     };
 109
 110 } // namespace JSC
 111
 112 #endif // PropertyNameArray_h