1 files changed, 162 insertions, 0 deletions
diff --git a/Source/WebKit2/Platform/CoreIPC/ArgumentEncoder.cpp b/Source/WebKit2/Platform/CoreIPC/ArgumentEncoder.cpp
new file mode 100644
index 0000000..1340c0a
--- /dev/null
+++ b/Source/WebKit2/Platform/CoreIPC/ArgumentEncoder.cpp
@@ -0,0 +1,162 @@
+/*
+ * 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.
+ */
+
+#include "ArgumentEncoder.h"
+
+#include <algorithm>
+#include <stdio.h>
+
+namespace CoreIPC {
+
+PassOwnPtr<ArgumentEncoder> ArgumentEncoder::create(uint64_t destinationID)
+{
+    return adoptPtr(new ArgumentEncoder(destinationID));
+}
+
+ArgumentEncoder::ArgumentEncoder(uint64_t destinationID)
+    : m_buffer(0)
+    , m_bufferPointer(0)
+    , m_bufferSize(0)
+    , m_bufferCapacity(0)
+{
+    // Encode the destination ID.
+    encodeUInt64(destinationID);
+}
+
+ArgumentEncoder::~ArgumentEncoder()
+{
+    if (m_buffer)
+        fastFree(m_buffer);
+    // FIXME: We need to dispose of the attachments in cases of failure.
+}
+
+static inline size_t roundUpToAlignment(size_t value, unsigned alignment)
+{
+    return ((value + alignment - 1) / alignment) * alignment;
+}
+
+uint8_t* ArgumentEncoder::grow(unsigned alignment, size_t size)
+{
+    size_t alignedSize = roundUpToAlignment(m_bufferSize, alignment);
+    
+    if (alignedSize + size > m_bufferCapacity) {
+        size_t newCapacity = std::max(alignedSize + size, std::max(static_cast<size_t>(32), m_bufferCapacity + m_bufferCapacity / 4 + 1));
+        if (!m_buffer)
+            m_buffer = static_cast<uint8_t*>(fastMalloc(newCapacity));
+        else
+            m_buffer = static_cast<uint8_t*>(fastRealloc(m_buffer, newCapacity));
+        
+        // FIXME: What should we do if allocating memory fails?
+
+        m_bufferCapacity = newCapacity;        
+    }
+
+    m_bufferSize = alignedSize + size;
+    m_bufferPointer = m_buffer + alignedSize + size;
+    
+    return m_buffer + alignedSize;
+}
+
+void ArgumentEncoder::encodeBytes(const uint8_t* bytes, size_t size)
+{
+    // Encode the size.
+    encodeUInt64(static_cast<uint64_t>(size));
+    
+    uint8_t* buffer = grow(1, size);
+    
+    memcpy(buffer, bytes, size);
+}
+
+void ArgumentEncoder::encodeBool(bool n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+    
+    *reinterpret_cast<bool*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeUInt32(uint32_t n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+    
+    *reinterpret_cast<uint32_t*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeUInt64(uint64_t n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+    
+    *reinterpret_cast<uint64_t*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeInt32(int32_t n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+    
+    *reinterpret_cast<int32_t*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeInt64(int64_t n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+    
+    *reinterpret_cast<int64_t*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeFloat(float n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+
+    *reinterpret_cast<float*>(buffer) = n;
+}
+
+void ArgumentEncoder::encodeDouble(double n)
+{
+    uint8_t* buffer = grow(__alignof(n), sizeof(n));
+
+    *reinterpret_cast<double*>(buffer) = n;
+}
+
+void ArgumentEncoder::addAttachment(const Attachment& attachment)
+{
+    m_attachments.append(attachment);
+}
+
+Vector<Attachment> ArgumentEncoder::releaseAttachments()
+{
+    Vector<Attachment> newList;
+    newList.swap(m_attachments);
+    return newList;
+}
+
+#ifndef NDEBUG
+void ArgumentEncoder::debug()
+{
+    printf("ArgumentEncoder::debug()\n");
+    printf("Number of Attachments: %d\n", (int)m_attachments.size());
+    printf("Size of buffer: %d\n", (int)m_bufferSize);
+}
+#endif
+
+} // namespace CoreIPC