| 1 | /* |
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| 2 | * Copyright (C) 2009 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 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 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 "UStringImpl.h" |
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| 28 | |
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| 29 | #include "Identifier.h" |
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| 30 | #include "UString.h" |
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| 31 | #include <wtf/unicode/UTF8.h> |
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| 32 | |
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| 33 | using namespace WTF::Unicode; |
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| 34 | using namespace std; |
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| 35 | |
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| 36 | namespace JSC { |
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| 37 | |
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| 38 | SharedUChar* UStringImpl::baseSharedBuffer() |
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| 39 | { |
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| 40 | ASSERT((bufferOwnership() == BufferShared) |
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| 41 | || ((bufferOwnership() == BufferOwned) && !m_buffer)); |
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| 42 | |
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| 43 | if (bufferOwnership() != BufferShared) { |
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| 44 | m_refCountAndFlags = (m_refCountAndFlags & ~s_refCountMaskBufferOwnership) | BufferShared; |
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| 45 | m_bufferShared = SharedUChar::create(data: new OwnFastMallocPtr<UChar>(m_data)).releaseRef(); |
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| 46 | } |
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| 47 | |
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| 48 | return m_bufferShared; |
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| 49 | } |
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| 50 | |
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| 51 | SharedUChar* UStringImpl::sharedBuffer() |
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| 52 | { |
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| 53 | if (m_length < s_minLengthToShare) |
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| 54 | return 0; |
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| 55 | ASSERT(!isStatic()); |
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| 56 | |
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| 57 | UStringImpl* owner = bufferOwnerString(); |
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| 58 | if (owner->bufferOwnership() == BufferInternal) |
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| 59 | return 0; |
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| 60 | |
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| 61 | return owner->baseSharedBuffer(); |
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| 62 | } |
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| 63 | |
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| 64 | UStringImpl::~UStringImpl() |
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| 65 | { |
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| 66 | ASSERT(!isStatic()); |
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| 67 | checkConsistency(); |
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| 68 | |
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| 69 | if (isIdentifier()) |
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| 70 | Identifier::remove(this); |
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| 71 | |
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| 72 | if (bufferOwnership() != BufferInternal) { |
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| 73 | if (bufferOwnership() == BufferOwned) |
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| 74 | fastFree(m_data); |
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| 75 | else if (bufferOwnership() == BufferSubstring) |
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| 76 | m_bufferSubstring->deref(); |
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| 77 | else { |
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| 78 | ASSERT(bufferOwnership() == BufferShared); |
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| 79 | m_bufferShared->deref(); |
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| 80 | } |
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| 81 | } |
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| 82 | } |
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| 83 | |
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| 84 | } |
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| 85 | |
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