--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/platform/SharedBuffer.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (C) Research In Motion Limited 2009-2010. 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * 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.
+ */
+#ifndef SharedBuffer_h
+#define SharedBuffer_h
+
+#include "PlatformString.h"
+#include <wtf/Forward.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/RefCounted.h>
+#include <wtf/Vector.h>
+
+#if PLATFORM(CF)
+#include <wtf/RetainPtr.h>
+#endif
+
+#if PLATFORM(MAC)
+#ifdef __OBJC__
+@class NSData;
+#else
+class NSData;
+#endif
+
+#endif
+
+namespace WebCore {
+
+class PurgeableBuffer;
+
+class SharedBuffer : public RefCounted<SharedBuffer> {
+public:
+ static PassRefPtr<SharedBuffer> create() { return adoptRef(new SharedBuffer); }
+ static PassRefPtr<SharedBuffer> create(const char* c, int i) { return adoptRef(new SharedBuffer(c, i)); }
+ static PassRefPtr<SharedBuffer> create(const unsigned char* c, int i) { return adoptRef(new SharedBuffer(c, i)); }
+
+ static PassRefPtr<SharedBuffer> createWithContentsOfFile(const String& filePath);
+
+ static PassRefPtr<SharedBuffer> adoptVector(Vector<char>& vector);
+
+ // The buffer must be in non-purgeable state before adopted to a SharedBuffer.
+ // It will stay that way until released.
+ static PassRefPtr<SharedBuffer> adoptPurgeableBuffer(PassOwnPtr<PurgeableBuffer>);
+
+ ~SharedBuffer();
+
+#if PLATFORM(MAC)
+ NSData *createNSData();
+ static PassRefPtr<SharedBuffer> wrapNSData(NSData *data);
+#endif
+#if PLATFORM(CF)
+ CFDataRef createCFData();
+ static PassRefPtr<SharedBuffer> wrapCFData(CFDataRef);
+#endif
+
+ // Calling this function will force internal segmented buffers
+ // to be merged into a flat buffer. Use getSomeData() whenever possible
+ // for better performance.
+ const char* data() const;
+
+ unsigned size() const;
+
+ // Calling this function will force internal segmented buffers
+ // to be merged into a flat buffer. Use getSomeData() whenever possible
+ // for better performance.
+ const Vector<char>& buffer() const;
+
+ bool isEmpty() const { return !size(); }
+
+ void append(const char*, unsigned);
+ void clear();
+ const char* platformData() const;
+ unsigned platformDataSize() const;
+
+ PassRefPtr<SharedBuffer> copy() const;
+
+ bool hasPurgeableBuffer() const { return m_purgeableBuffer.get(); }
+
+ // Ensure this buffer has no other clients before calling this.
+ PassOwnPtr<PurgeableBuffer> releasePurgeableBuffer();
+
+ // Return the number of consecutive bytes after "position". "data"
+ // points to the first byte.
+ // Return 0 when no more data left.
+ // When extracting all data with getSomeData(), the caller should
+ // repeat calling it until it returns 0.
+ // Usage:
+ // const char* segment;
+ // unsigned pos = 0;
+ // while (unsigned length = sharedBuffer->getSomeData(segment, pos)) {
+ // // Use the data. for example: decoder->decode(segment, length);
+ // pos += length;
+ // }
+ unsigned getSomeData(const char*& data, unsigned position = 0) const;
+
+private:
+ SharedBuffer();
+ SharedBuffer(const char*, int);
+ SharedBuffer(const unsigned char*, int);
+
+ void clearPlatformData();
+ void maybeTransferPlatformData();
+ bool hasPlatformData() const;
+
+ unsigned m_size;
+ mutable Vector<char> m_buffer;
+ mutable Vector<char*> m_segments;
+ OwnPtr<PurgeableBuffer> m_purgeableBuffer;
+#if PLATFORM(CF)
+ SharedBuffer(CFDataRef);
+ RetainPtr<CFDataRef> m_cfData;
+#endif
+};
+
+}
+
+#endif // SharedBuffer_h