1 files changed, 202 insertions, 0 deletions
diff --git a/Source/WebCore/platform/cf/SharedBufferCF.cpp b/Source/WebCore/platform/cf/SharedBufferCF.cpp
new file mode 100644
index 000000000..21af320d9
--- /dev/null
+++ b/Source/WebCore/platform/cf/SharedBufferCF.cpp
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2008, 2010 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.
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "SharedBuffer.h"
+
+#include <wtf/OSAllocator.h>
+#include <wtf/cf/TypeCastsCF.h>
+
+namespace WebCore {
+
+SharedBuffer::SharedBuffer(CFDataRef cfData)
+    : m_buffer(adoptRef(new DataBuffer))
+    , m_cfData(cfData)
+    , m_vnodeToken(VNodeTracker::singleton().token())
+{
+}
+
+// Using Foundation allows for an even more efficient implementation of this function,
+// so only use this version for non-Foundation.
+#if !USE(FOUNDATION)
+RetainPtr<CFDataRef> SharedBuffer::createCFData()
+{
+    if (m_cfData)
+        return m_cfData;
+
+    // Internal data in SharedBuffer can be segmented. We need to get the contiguous buffer.
+    const Vector<char>& contiguousBuffer = buffer();
+    return adoptCF(CFDataCreate(0, reinterpret_cast<const UInt8*>(contiguousBuffer.data()), contiguousBuffer.size()));
+}
+#endif
+
+PassRefPtr<SharedBuffer> SharedBuffer::wrapCFData(CFDataRef data)
+{
+    return adoptRef(new SharedBuffer(data));
+}
+
+bool SharedBuffer::hasPlatformData() const
+{
+    return m_cfData;
+}
+
+const char* SharedBuffer::platformData() const
+{
+    return reinterpret_cast<const char*>(CFDataGetBytePtr(m_cfData.get()));
+}
+
+unsigned SharedBuffer::platformDataSize() const
+{
+    return CFDataGetLength(m_cfData.get());
+}
+
+void SharedBuffer::hintMemoryNotNeededSoon()
+{
+    if (!hasPlatformData())
+        return;
+    OSAllocator::hintMemoryNotNeededSoon(const_cast<char*>(platformData()), platformDataSize());
+}
+
+void SharedBuffer::maybeTransferPlatformData()
+{
+    if (!m_cfData)
+        return;
+    
+    ASSERT(!m_size);
+    
+    // Hang on to the m_cfData pointer in a local pointer as append() will re-enter maybeTransferPlatformData()
+    // and we need to make sure to early return when it does.
+    RetainPtr<CFDataRef> cfData = adoptCF(m_cfData.leakRef());
+
+    append(reinterpret_cast<const char*>(CFDataGetBytePtr(cfData.get())), CFDataGetLength(cfData.get()));
+}
+
+void SharedBuffer::clearPlatformData()
+{
+    m_cfData = 0;
+}
+
+bool SharedBuffer::tryReplaceContentsWithPlatformBuffer(SharedBuffer& newContents)
+{
+    if (!newContents.m_cfData)
+        return false;
+
+    clear();
+    m_cfData = newContents.m_cfData;
+    return true;
+}
+
+bool SharedBuffer::maybeAppendPlatformData(SharedBuffer* newContents)
+{
+    if (size() || !newContents->m_cfData)
+        return false;
+    m_cfData = newContents->m_cfData;
+    return true;
+}
+
+#if USE(NETWORK_CFDATA_ARRAY_CALLBACK)
+PassRefPtr<SharedBuffer> SharedBuffer::wrapCFDataArray(CFArrayRef cfDataArray)
+{
+    return adoptRef(new SharedBuffer(cfDataArray));
+}
+
+SharedBuffer::SharedBuffer(CFArrayRef cfDataArray)
+    : m_buffer(adoptRef(new DataBuffer))
+    , m_cfData(nullptr)
+{
+    CFIndex dataArrayCount = CFArrayGetCount(cfDataArray);
+    for (CFIndex index = 0; index < dataArrayCount; ++index)
+        append(checked_cf_cast<CFDataRef>(CFArrayGetValueAtIndex(cfDataArray, index)));
+}
+
+void SharedBuffer::append(CFDataRef data)
+{
+    ASSERT(data);
+    m_dataArray.append(data);
+    m_size += CFDataGetLength(data);
+}
+
+void SharedBuffer::copyBufferAndClear(char* destination, unsigned bytesToCopy) const
+{
+    if (m_dataArray.isEmpty())
+        return;
+
+    CFIndex bytesLeft = bytesToCopy;
+    for (auto& cfData : m_dataArray) {
+        CFIndex dataLen = CFDataGetLength(cfData.get());
+        ASSERT(bytesLeft >= dataLen);
+        memcpy(destination, CFDataGetBytePtr(cfData.get()), dataLen);
+        destination += dataLen;
+        bytesLeft -= dataLen;
+    }
+    m_dataArray.clear();
+}
+
+unsigned SharedBuffer::copySomeDataFromDataArray(const char*& someData, unsigned position) const
+{
+    unsigned totalOffset = 0;
+    for (auto& cfData : m_dataArray) {
+        unsigned dataLen = static_cast<unsigned>(CFDataGetLength(cfData.get()));
+        ASSERT(totalOffset <= position);
+        unsigned localOffset = position - totalOffset;
+        if (localOffset < dataLen) {
+            someData = reinterpret_cast<const char *>(CFDataGetBytePtr(cfData.get())) + localOffset;
+            return dataLen - localOffset;
+        }
+        totalOffset += dataLen;
+    }
+    return 0;
+}
+
+const char *SharedBuffer::singleDataArrayBuffer() const
+{
+    // If we had previously copied data into m_buffer in copyDataArrayAndClear() or some other
+    // function, then we can't return a pointer to the CFDataRef buffer.
+    if (m_buffer->data.size())
+        return 0;
+
+    if (m_dataArray.size() != 1)
+        return 0;
+
+    return reinterpret_cast<const char*>(CFDataGetBytePtr(m_dataArray.at(0).get()));
+}
+
+bool SharedBuffer::maybeAppendDataArray(SharedBuffer* data)
+{
+    if (m_buffer->data.size() || m_cfData || !data->m_dataArray.size())
+        return false;
+#if !ASSERT_DISABLED
+    unsigned originalSize = size();
+#endif
+    for (auto& cfData : data->m_dataArray)
+        append(cfData.get());
+    ASSERT(size() == originalSize + data->size());
+    return true;
+}
+#endif
+
+}