1/*
2 * Copyright (C) 2006 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 "SharedBuffer.h"
28
29#include "WebCoreObjCExtras.h"
30#include <runtime/InitializeThreading.h>
31#include <string.h>
32#include <wtf/MainThread.h>
33#include <wtf/PassRefPtr.h>
34
35using namespace WebCore;
36
37@interface WebCoreSharedBufferData : NSData
38{
39    RefPtr<SharedBuffer::DataBuffer> sharedBufferDataBuffer;
40#if ENABLE(DISK_IMAGE_CACHE)
41    RefPtr<SharedBuffer> sharedBuffer;
42#endif
43}
44
45- (id)initWithSharedBufferDataBuffer:(SharedBuffer::DataBuffer*)dataBuffer;
46#if ENABLE(DISK_IMAGE_CACHE)
47- (id)initWithMemoryMappedSharedBuffer:(SharedBuffer&)memoryMappedSharedBuffer;
48#endif
49@end
50
51@implementation WebCoreSharedBufferData
52
53+ (void)initialize
54{
55#if !USE(WEB_THREAD)
56    JSC::initializeThreading();
57    WTF::initializeMainThreadToProcessMainThread();
58#endif // !USE(WEB_THREAD)
59    WebCoreObjCFinalizeOnMainThread(self);
60}
61
62- (void)dealloc
63{
64    if (WebCoreObjCScheduleDeallocateOnMainThread([WebCoreSharedBufferData class], self))
65        return;
66
67    [super dealloc];
68}
69
70- (void)finalize
71{
72    [super finalize];
73}
74
75- (id)initWithSharedBufferDataBuffer:(SharedBuffer::DataBuffer*)dataBuffer
76{
77    self = [super init];
78
79    if (self)
80        sharedBufferDataBuffer = dataBuffer;
81
82    return self;
83}
84
85#if ENABLE(DISK_IMAGE_CACHE)
86- (id)initWithMemoryMappedSharedBuffer:(SharedBuffer&)memoryMappedSharedBuffer
87{
88    ASSERT(memoryMappedSharedBuffer.isMemoryMapped());
89    self = [super init];
90
91    if (!self)
92        return nil;
93
94    sharedBuffer = &memoryMappedSharedBuffer;
95    return self;
96}
97#endif
98
99- (NSUInteger)length
100{
101#if ENABLE(DISK_IMAGE_CACHE)
102    if (sharedBuffer)
103        return sharedBuffer->size();
104#endif
105    return sharedBufferDataBuffer->data.size();
106}
107
108- (const void *)bytes
109{
110#if ENABLE(DISK_IMAGE_CACHE)
111    if (sharedBuffer)
112        return sharedBuffer->data();
113#endif
114    return sharedBufferDataBuffer->data.data();
115}
116
117@end
118
119namespace WebCore {
120
121PassRefPtr<SharedBuffer> SharedBuffer::wrapNSData(NSData *nsData)
122{
123    return adoptRef(new SharedBuffer((CFDataRef)nsData));
124}
125
126RetainPtr<NSData> SharedBuffer::createNSData()
127{
128    return adoptNS((NSData *)createCFData().leakRef());
129}
130
131CFDataRef SharedBuffer::existingCFData()
132{
133    if (m_cfData)
134        return m_cfData.get();
135
136#if USE(NETWORK_CFDATA_ARRAY_CALLBACK)
137    if (m_dataArray.size() == 1)
138        return m_dataArray.at(0).get();
139#endif
140
141    return nullptr;
142}
143
144RetainPtr<CFDataRef> SharedBuffer::createCFData()
145{
146    if (CFDataRef cfData = existingCFData())
147        return cfData;
148
149#if ENABLE(DISK_IMAGE_CACHE)
150    if (isMemoryMapped())
151        return adoptCF((CFDataRef)adoptNS([[WebCoreSharedBufferData alloc] initWithMemoryMappedSharedBuffer:*this]).leakRef());
152#endif
153
154    data(); // Force data into m_buffer from segments or data array.
155    if (hasPurgeableBuffer()) {
156        RefPtr<SharedBuffer::DataBuffer> copiedBuffer = adoptRef(new DataBuffer);
157        copiedBuffer->data.append(data(), size());
158        return adoptCF((CFDataRef)adoptNS([[WebCoreSharedBufferData alloc] initWithSharedBufferDataBuffer:copiedBuffer.get()]).leakRef());
159    }
160
161    return adoptCF((CFDataRef)adoptNS([[WebCoreSharedBufferData alloc] initWithSharedBufferDataBuffer:m_buffer.get()]).leakRef());
162}
163
164PassRefPtr<SharedBuffer> SharedBuffer::createWithContentsOfFile(const String& filePath)
165{
166    NSData *resourceData = [NSData dataWithContentsOfFile:filePath];
167    if (resourceData)
168        return SharedBuffer::wrapNSData(resourceData);
169    return 0;
170}
171
172}
173