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/*
* 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();
}
}
}
}
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