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-rw-r--r--Source/WebKit2/Platform/IPC/ArgumentDecoder.h111
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diff --git a/Source/WebKit2/Platform/IPC/ArgumentDecoder.h b/Source/WebKit2/Platform/IPC/ArgumentDecoder.h
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--- a/Source/WebKit2/Platform/IPC/ArgumentDecoder.h
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-/*
- * Copyright (C) 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.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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.
- */
-
-#ifndef ArgumentDecoder_h
-#define ArgumentDecoder_h
-
-#include "ArgumentCoder.h"
-#include "Attachment.h"
-#include <wtf/Vector.h>
-
-namespace IPC {
-
-class DataReference;
-
-class ArgumentDecoder {
-public:
- ArgumentDecoder(const uint8_t* buffer, size_t bufferSize);
- virtual ~ArgumentDecoder();
-
- size_t length() const { return m_bufferEnd - m_buffer; }
-
- bool isInvalid() const { return m_bufferPos > m_bufferEnd; }
- void markInvalid() { m_bufferPos = m_bufferEnd + 1; }
-
- bool decodeFixedLengthData(uint8_t*, size_t, unsigned alignment);
-
- // The data in the data reference here will only be valid for the lifetime of the ArgumentDecoder object.
- bool decodeVariableLengthByteArray(DataReference&);
-
- bool decode(bool&);
- bool decode(uint8_t&);
- bool decode(uint16_t&);
- bool decode(uint32_t&);
- bool decode(uint64_t&);
- bool decode(int32_t&);
- bool decode(int64_t&);
- bool decode(float&);
- bool decode(double&);
-
- template<typename T> bool decodeEnum(T& result)
- {
- static_assert(sizeof(T) <= 8, "Enum type T must not be larger than 64 bits!");
-
- uint64_t value;
- if (!decode(value))
- return false;
-
- result = static_cast<T>(value);
- return true;
- }
-
- template<typename T>
- bool bufferIsLargeEnoughToContain(size_t numElements) const
- {
- static_assert(std::is_arithmetic<T>::value, "Type T must have a fixed, known encoded size!");
-
- if (numElements > std::numeric_limits<size_t>::max() / sizeof(T))
- return false;
-
- return bufferIsLargeEnoughToContain(alignof(T), numElements * sizeof(T));
- }
-
- // Generic type decode function.
- template<typename T> bool decode(T& t)
- {
- return ArgumentCoder<T>::decode(*this, t);
- }
-
- bool removeAttachment(Attachment&);
-
-protected:
- ArgumentDecoder(const uint8_t* buffer, size_t bufferSize, Vector<Attachment>);
-
- void initialize(const uint8_t* buffer, size_t bufferSize);
-
- bool alignBufferPosition(unsigned alignment, size_t size);
- bool bufferIsLargeEnoughToContain(unsigned alignment, size_t size) const;
-
-private:
- uint8_t* m_buffer;
- uint8_t* m_bufferPos;
- uint8_t* m_bufferEnd;
-
- Vector<Attachment> m_attachments;
-};
-
-} // namespace IPC
-
-#endif // ArgumentDecoder_h