| 1 | /*
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| 2 | * Copyright (C) 2008 Apple Inc. All rights reserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | * 1. Redistributions of source code must retain the above copyright
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| 8 | * notice, this list of conditions and the following disclaimer.
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| 9 | * 2. Redistributions in binary form must reproduce the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer in the
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| 11 | * documentation and/or other materials provided with the distribution.
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| 12 | *
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| 13 | * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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| 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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| 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
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| 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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| 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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| 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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| 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 24 | */
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| 25 |
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| 26 | #include "config.h"
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| 27 | #include "StructureChain.h"
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| 28 |
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| 29 | #include "JSObject.h"
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| 30 | #include "Structure.h"
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| 31 | #include <wtf/RefPtr.h>
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| 32 |
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| 33 | namespace JSC {
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| 34 |
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| 35 | StructureChain::StructureChain(Structure* structure)
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| 36 | {
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| 37 | size_t size = 1;
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| 38 |
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| 39 | Structure* tmp = structure;
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| 40 | while (!tmp->storedPrototype()->isNull()) {
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| 41 | ++size;
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| 42 | tmp = asCell(tmp->storedPrototype())->structure();
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| 43 | }
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| 44 |
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| 45 | m_vector.set(new RefPtr<Structure>[size + 1]);
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| 46 |
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| 47 | size_t i;
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| 48 | for (i = 0; i < size - 1; ++i) {
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| 49 | m_vector[i] = structure;
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| 50 | structure = asObject(structure->storedPrototype())->structure();
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| 51 | }
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| 52 | m_vector[i] = structure;
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| 53 | m_vector[i + 1] = 0;
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| 54 | }
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| 55 |
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| 56 | bool structureChainsAreEqual(StructureChain* chainA, StructureChain* chainB)
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| 57 | {
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| 58 | if (!chainA || !chainB)
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| 59 | return false;
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| 60 |
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| 61 | RefPtr<Structure>* a = chainA->head();
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| 62 | RefPtr<Structure>* b = chainB->head();
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| 63 | while (1) {
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| 64 | if (*a != *b)
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| 65 | return false;
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| 66 | if (!*a)
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| 67 | return true;
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| 68 | a++;
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| 69 | b++;
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| 70 | }
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| 71 | }
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| 72 |
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| 73 | } // namespace JSC
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