/* | |
* Copyright (C) 2009 Apple Inc. All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions | |
* are met: | |
* 1. Redistributions of source code must retain the above copyright | |
* notice, this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright | |
* notice, this list of conditions and the following disclaimer in the | |
* documentation and/or other materials provided with the distribution. | |
* | |
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
*/ | |
#include "config.h" | |
#include "UStringImpl.h" | |
#include "Identifier.h" | |
#include "UString.h" | |
#include <wtf/unicode/UTF8.h> | |
using namespace WTF::Unicode; | |
using namespace std; | |
namespace JSC { | |
SharedUChar* UStringImpl::baseSharedBuffer() | |
{ | |
ASSERT((bufferOwnership() == BufferShared) | |
|| ((bufferOwnership() == BufferOwned) && !m_buffer)); | |
if (bufferOwnership() != BufferShared) { | |
m_refCountAndFlags = (m_refCountAndFlags & ~s_refCountMaskBufferOwnership) | BufferShared; | |
m_bufferShared = SharedUChar::create(new OwnFastMallocPtr<UChar>(m_data)).releaseRef(); | |
} | |
return m_bufferShared; | |
} | |
SharedUChar* UStringImpl::sharedBuffer() | |
{ | |
if (m_length < s_minLengthToShare) | |
return 0; | |
ASSERT(!isStatic()); | |
UStringImpl* owner = bufferOwnerString(); | |
if (owner->bufferOwnership() == BufferInternal) | |
return 0; | |
return owner->baseSharedBuffer(); | |
} | |
UStringImpl::~UStringImpl() | |
{ | |
ASSERT(!isStatic()); | |
checkConsistency(); | |
if (isIdentifier()) | |
Identifier::remove(this); | |
if (bufferOwnership() != BufferInternal) { | |
if (bufferOwnership() == BufferOwned) | |
fastFree(m_data); | |
else if (bufferOwnership() == BufferSubstring) | |
m_bufferSubstring->deref(); | |
else { | |
ASSERT(bufferOwnership() == BufferShared); | |
m_bufferShared->deref(); | |
} | |
} | |
} | |
} |