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/*
* Copyright (C) 2014 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. AND ITS CONTRIBUTORS ``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 ITS 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 <wtf/text/icu/UTextProvider.h>
#include <algorithm>
#include <string.h>
namespace WTF {
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
// Relocate pointer from source into destination as required.
static inline void fixPointer(const UText* source, UText* destination, const void*& pointer)
{
if (pointer >= source->pExtra && pointer < static_cast<char*>(source->pExtra) + source->extraSize) {
// Pointer references source extra buffer.
pointer = static_cast<char*>(destination->pExtra) + (static_cast<const char*>(pointer) - static_cast<const char*>(source->pExtra));
} else if (pointer >= source && pointer < reinterpret_cast<const char*>(source) + source->sizeOfStruct) {
// Pointer references source text structure, but not source extra buffer.
pointer = reinterpret_cast<char*>(destination) + (static_cast<const char*>(pointer) - reinterpret_cast<const char*>(source));
}
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
UText* uTextCloneImpl(UText* destination, const UText* source, UBool deep, UErrorCode* status)
{
ASSERT_UNUSED(deep, !deep);
if (U_FAILURE(*status))
return nullptr;
int32_t extraSize = source->extraSize;
destination = utext_setup(destination, extraSize, status);
if (U_FAILURE(*status))
return destination;
void* extraNew = destination->pExtra;
int32_t flags = destination->flags;
int sizeToCopy = std::min(source->sizeOfStruct, destination->sizeOfStruct);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
memcpy(destination, source, sizeToCopy);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
destination->pExtra = extraNew;
destination->flags = flags;
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
memcpy(destination->pExtra, source->pExtra, extraSize);
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
fixPointer(source, destination, destination->context);
fixPointer(source, destination, destination->p);
fixPointer(source, destination, destination->q);
ASSERT(!destination->r);
const void* chunkContents = static_cast<const void*>(destination->chunkContents);
fixPointer(source, destination, chunkContents);
destination->chunkContents = static_cast<const char16_t*>(chunkContents);
return destination;
}
} // namespace WTF
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