1/*
2 * Copyright (C) 2006, 2007 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. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "JSStringRefCF.h"
28
29#include "APICast.h"
30#include "InitializeThreading.h"
31#include "JSCJSValue.h"
32#include "JSStringRef.h"
33#include "OpaqueJSString.h"
34#include <wtf/StdLibExtras.h>
35
36JSStringRef JSStringCreateWithCFString(CFStringRef string)
37{
38    JSC::initializeThreading();
39
40    // We cannot use CFIndex here since CFStringGetLength can return values larger than
41    // it can hold.  (<rdar://problem/6806478>)
42    size_t length = CFStringGetLength(string);
43    if (!length)
44        return OpaqueJSString::create(reinterpret_cast<const LChar*>(""), 0).leakRef();
45
46    Vector<LChar, 1024> lcharBuffer(length);
47    CFIndex usedBufferLength;
48    CFIndex convertedSize = CFStringGetBytes(string, CFRangeMake(0, length), kCFStringEncodingISOLatin1, 0, false, lcharBuffer.data(), length, &usedBufferLength);
49    if (static_cast<size_t>(convertedSize) == length && static_cast<size_t>(usedBufferLength) == length)
50        return OpaqueJSString::create(lcharBuffer.data(), length).leakRef();
51
52    auto buffer = std::make_unique<UniChar[]>(length);
53    CFStringGetCharacters(string, CFRangeMake(0, length), buffer.get());
54    static_assert(sizeof(UniChar) == sizeof(UChar), "UniChar and UChar must be same size");
55    return OpaqueJSString::create(reinterpret_cast<UChar*>(buffer.get()), length).leakRef();
56}
57
58CFStringRef JSStringCopyCFString(CFAllocatorRef allocator, JSStringRef string)
59{
60    if (!string->length())
61        return CFSTR("");
62
63    if (string->is8Bit())
64        return CFStringCreateWithBytes(allocator, reinterpret_cast<const UInt8*>(string->characters8()), string->length(), kCFStringEncodingISOLatin1, false);
65
66    return CFStringCreateWithCharacters(allocator, reinterpret_cast<const UniChar*>(string->characters16()), string->length());
67}
68