| 1 | /*
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| 2 | * Copyright (C) 1999-2000 Harri Porten ([email protected])
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| 3 | * Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved.
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU Lesser General Public
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| 7 | * License as published by the Free Software Foundation; either
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| 8 | * version 2 of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This library is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | * Lesser General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU Lesser General Public
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| 16 | * License along with this library; if not, write to the Free Software
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| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 18 | *
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| 19 | */
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| 20 |
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| 21 | #ifndef JSArray_h
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| 22 | #define JSArray_h
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| 23 |
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| 24 | #include "JSObject.h"
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| 25 |
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| 26 | namespace JSC {
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| 27 |
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| 28 | typedef HashMap<unsigned, JSValue*> SparseArrayValueMap;
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| 29 |
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| 30 | struct ArrayStorage {
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| 31 | unsigned m_length;
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| 32 | unsigned m_vectorLength;
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| 33 | unsigned m_numValuesInVector;
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| 34 | SparseArrayValueMap* m_sparseValueMap;
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| 35 | void* lazyCreationData; // A JSArray subclass can use this to fill the vector lazily.
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| 36 | JSValue* m_vector[1];
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| 37 | };
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| 38 |
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| 39 | class JSArray : public JSObject {
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| 40 | friend class CTI;
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| 41 |
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| 42 | public:
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| 43 | explicit JSArray(PassRefPtr<StructureID>);
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| 44 | JSArray(PassRefPtr<StructureID>, unsigned initialLength);
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| 45 | JSArray(ExecState*, PassRefPtr<StructureID>, const ArgList& initialValues);
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| 46 | virtual ~JSArray();
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| 47 |
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| 48 | virtual bool getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot&);
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| 49 | virtual bool getOwnPropertySlot(ExecState*, unsigned propertyName, PropertySlot&);
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| 50 | virtual void put(ExecState*, unsigned propertyName, JSValue*); // FIXME: Make protected and add setItem.
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| 51 |
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| 52 | static const ClassInfo info;
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| 53 |
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| 54 | unsigned length() const { return m_storage->m_length; }
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| 55 | void setLength(unsigned); // OK to use on new arrays, but not if it might be a RegExpMatchArray.
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| 56 |
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| 57 | void sort(ExecState*);
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| 58 | void sort(ExecState*, JSValue* compareFunction, CallType, const CallData&);
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| 59 |
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| 60 | void push(ExecState*, JSValue*);
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| 61 | JSValue* pop();
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| 62 |
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| 63 | bool canGetIndex(unsigned i) { return i < m_fastAccessCutoff; }
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| 64 | JSValue* getIndex(unsigned i)
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| 65 | {
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| 66 | ASSERT(canGetIndex(i));
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| 67 | return m_storage->m_vector[i];
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| 68 | }
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| 69 |
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| 70 | bool canSetIndex(unsigned i) { return i < m_fastAccessCutoff; }
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| 71 | JSValue* setIndex(unsigned i, JSValue* v)
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| 72 | {
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| 73 | ASSERT(canSetIndex(i));
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| 74 | return m_storage->m_vector[i] = v;
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| 75 | }
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| 76 |
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| 77 | protected:
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| 78 | virtual void put(ExecState*, const Identifier& propertyName, JSValue*, PutPropertySlot&);
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| 79 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName);
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| 80 | virtual bool deleteProperty(ExecState*, unsigned propertyName);
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| 81 | virtual void getPropertyNames(ExecState*, PropertyNameArray&);
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| 82 | virtual void mark();
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| 83 |
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| 84 | void* lazyCreationData();
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| 85 | void setLazyCreationData(void*);
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| 86 |
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| 87 | private:
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| 88 | virtual const ClassInfo* classInfo() const { return &info; }
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| 89 |
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| 90 | bool getOwnPropertySlotSlowCase(ExecState*, unsigned propertyName, PropertySlot&);
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| 91 | void putSlowCase(ExecState*, unsigned propertyName, JSValue*);
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| 92 |
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| 93 | bool increaseVectorLength(unsigned newLength);
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| 94 |
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| 95 | unsigned compactForSorting();
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| 96 |
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| 97 | enum ConsistencyCheckType { NormalConsistencyCheck, DestructorConsistencyCheck, SortConsistencyCheck };
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| 98 | void checkConsistency(ConsistencyCheckType = NormalConsistencyCheck);
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| 99 |
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| 100 | unsigned m_fastAccessCutoff;
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| 101 | ArrayStorage* m_storage;
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| 102 | };
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| 103 |
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| 104 | JSArray* constructEmptyArray(ExecState*);
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| 105 | JSArray* constructEmptyArray(ExecState*, unsigned initialLength);
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| 106 | JSArray* constructArray(ExecState*, JSValue* singleItemValue);
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| 107 | JSArray* constructArray(ExecState*, const ArgList& values);
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| 108 |
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| 109 | } // namespace JSC
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| 110 |
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| 111 | #endif // JSArray_h
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