webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 128 insertions, 0 deletions

diff --git a/Source/WebKit2/Platform/IPC/Encoder.h b/Source/WebKit2/Platform/IPC/Encoder.h
new file mode 100644
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+++ b/Source/WebKit2/Platform/IPC/Encoder.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.
+ */
+
+#pragma once
+
+#include "ArgumentCoder.h"
+#include "Attachment.h"
+#include "StringReference.h"
+#include <wtf/EnumTraits.h>
+#include <wtf/Vector.h>
+
+namespace IPC {
+
+class DataReference;
+
+class Encoder final {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    Encoder(StringReference messageReceiverName, StringReference messageName, uint64_t destinationID);
+    ~Encoder();
+
+    StringReference messageReceiverName() const { return m_messageReceiverName; }
+    StringReference messageName() const { return m_messageName; }
+    uint64_t destinationID() const { return m_destinationID; }
+
+    void setIsSyncMessage(bool);
+    bool isSyncMessage() const;
+
+    void setShouldDispatchMessageWhenWaitingForSyncReply(bool);
+    bool shouldDispatchMessageWhenWaitingForSyncReply() const;
+
+    void setFullySynchronousModeForTesting();
+
+    void wrapForTesting(std::unique_ptr<Encoder>);
+
+    void encodeFixedLengthData(const uint8_t*, size_t, unsigned alignment);
+    void encodeVariableLengthByteArray(const DataReference&);
+
+    template<typename T> void encodeEnum(T t)
+    {
+        COMPILE_ASSERT(sizeof(T) <= sizeof(uint64_t), enum_type_must_not_be_larger_than_64_bits);
+
+        encode(static_cast<uint64_t>(t));
+    }
+
+    template<typename T>
+    auto encode(T&& t) -> std::enable_if_t<!std::is_enum<typename std::remove_const_t<std::remove_reference_t<T>>>::value>
+    {
+        ArgumentCoder<typename std::remove_const<typename std::remove_reference<T>::type>::type>::encode(*this, std::forward<T>(t));
+    }
+
+    template<typename T> Encoder& operator<<(T&& t)
+    {
+        encode(std::forward<T>(t));
+        return *this;
+    }
+
+    uint8_t* buffer() const { return m_buffer; }
+    size_t bufferSize() const { return m_bufferSize; }
+
+    void addAttachment(Attachment&&);
+    Vector<Attachment> releaseAttachments();
+    void reserve(size_t);
+
+    static const bool isIPCEncoder = true;
+
+private:
+    uint8_t* grow(unsigned alignment, size_t);
+
+    void encode(bool);
+    void encode(uint8_t);
+    void encode(uint16_t);
+    void encode(uint32_t);
+    void encode(uint64_t);
+    void encode(int32_t);
+    void encode(int64_t);
+    void encode(float);
+    void encode(double);
+
+    template<typename E>
+    auto encode(E value) -> std::enable_if_t<std::is_enum<E>::value>
+    {
+        static_assert(sizeof(E) <= sizeof(uint64_t), "Enum type must not be larger than 64 bits.");
+
+        ASSERT(isValidEnum<E>(static_cast<uint64_t>(value)));
+        encode(static_cast<uint64_t>(value));
+    }
+
+    void encodeHeader();
+
+    StringReference m_messageReceiverName;
+    StringReference m_messageName;
+    uint64_t m_destinationID;
+
+    uint8_t m_inlineBuffer[512];
+
+    uint8_t* m_buffer;
+    uint8_t* m_bufferPointer;
+    
+    size_t m_bufferSize;
+    size_t m_bufferCapacity;
+
+    Vector<Attachment> m_attachments;
+};
+
+} // namespace IPC