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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 {
PassRefPtr<UStringImpl> UStringImpl::create(const char* c)
{
ASSERT(c);
if (!c[0])
return &UStringImpl::empty();
size_t length = strlen(c);
UChar* d;
PassRefPtr<UStringImpl> result = UStringImpl::createUninitialized(length, d);
for (size_t i = 0; i < length; i++)
d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
return result;
}
PassRefPtr<UStringImpl> UStringImpl::create(const char* c, int length)
{
ASSERT(c);
if (!length)
return &UStringImpl::empty();
UChar* d;
PassRefPtr<UStringImpl> result = UStringImpl::createUninitialized(length, d);
for (int i = 0; i < length; i++)
d[i] = static_cast<unsigned char>(c[i]); // use unsigned char to zero-extend instead of sign-extend
return result;
}
PassRefPtr<UStringImpl> UStringImpl::create(const UChar* buffer, int length)
{
UChar* newBuffer;
PassRefPtr<UStringImpl> impl = createUninitialized(length, newBuffer);
copyChars(newBuffer, buffer, length);
return impl;
}
SharedUChar* UStringImpl::baseSharedBuffer()
{
ASSERT((bufferOwnership() == BufferShared)
|| ((bufferOwnership() == BufferOwned) && !m_dataBuffer.asPtr<void*>()));
if (bufferOwnership() != BufferShared)
m_dataBuffer = UntypedPtrAndBitfield(SharedUChar::create(new OwnFastMallocPtr<UChar>(m_data)).releaseRef(), BufferShared);
return m_dataBuffer.asPtr<SharedUChar*>();
}
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_dataBuffer.asPtr<UStringImpl*>()->deref();
else {
ASSERT(bufferOwnership() == BufferShared);
m_dataBuffer.asPtr<SharedUChar*>()->deref();
}
}
}
}
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