1/*
2 * Copyright (C) 2014 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "UTextProvider.h"
28
29#include <string.h>
30
31namespace WebCore {
32
33// Relocate pointer from source into destination as required.
34static inline void fixPointer(const UText* source, UText* destination, const void*& pointer)
35{
36    if (pointer >= source->pExtra && pointer < static_cast<char*>(source->pExtra) + source->extraSize) {
37        // Pointer references source extra buffer.
38        pointer = static_cast<char*>(destination->pExtra) + (static_cast<const char*>(pointer) - static_cast<const char*>(source->pExtra));
39    } else if (pointer >= source && pointer < reinterpret_cast<const char*>(source) + source->sizeOfStruct) {
40        // Pointer references source text structure, but not source extra buffer.
41        pointer = reinterpret_cast<char*>(destination) + (static_cast<const char*>(pointer) - reinterpret_cast<const char*>(source));
42    }
43}
44
45UText* uTextCloneImpl(UText* destination, const UText* source, UBool deep, UErrorCode* status)
46{
47    ASSERT_UNUSED(deep, !deep);
48    if (U_FAILURE(*status))
49        return nullptr;
50    int32_t extraSize = source->extraSize;
51    destination = utext_setup(destination, extraSize, status);
52    if (U_FAILURE(*status))
53        return destination;
54    void* extraNew = destination->pExtra;
55    int32_t flags = destination->flags;
56    int sizeToCopy = std::min(source->sizeOfStruct, destination->sizeOfStruct);
57    memcpy(destination, source, sizeToCopy);
58    destination->pExtra = extraNew;
59    destination->flags = flags;
60    memcpy(destination->pExtra, source->pExtra, extraSize);
61    fixPointer(source, destination, destination->context);
62    fixPointer(source, destination, destination->p);
63    fixPointer(source, destination, destination->q);
64    ASSERT(!destination->r);
65    const void* chunkContents = static_cast<const void*>(destination->chunkContents);
66    fixPointer(source, destination, chunkContents);
67    destination->chunkContents = static_cast<const UChar*>(chunkContents);
68    return destination;
69}
70
71} // namespace WebCore
72