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/*
* Copyright (C) 2011 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 "config.h"
#include "DecoderAdapter.h"
#include "DataReference.h"
#include "WebCoreArgumentCoders.h"
#include <wtf/text/WTFString.h>
namespace WebKit {
DecoderAdapter::DecoderAdapter(const uint8_t* buffer, size_t bufferSize)
: m_decoder(buffer, bufferSize)
{
}
bool DecoderAdapter::decodeBytes(Vector<uint8_t>& bytes)
{
CoreIPC::DataReference dataReference;
if (!m_decoder.decodeVariableLengthByteArray(dataReference))
return false;
bytes = dataReference.vector();
return true;
}
bool DecoderAdapter::decodeBool(bool& value)
{
return m_decoder.decodeBool(value);
}
bool DecoderAdapter::decodeUInt32(uint32_t& value)
{
return m_decoder.decodeUInt32(value);
}
bool DecoderAdapter::decodeUInt64(uint64_t& value)
{
return m_decoder.decodeUInt64(value);
}
bool DecoderAdapter::decodeInt32(int32_t& value)
{
return m_decoder.decodeInt32(value);
}
bool DecoderAdapter::decodeInt64(int64_t& value)
{
return m_decoder.decodeInt64(value);
}
bool DecoderAdapter::decodeFloat(float& value)
{
return m_decoder.decodeFloat(value);
}
bool DecoderAdapter::decodeDouble(double& value)
{
return m_decoder.decodeDouble(value);
}
bool DecoderAdapter::decodeString(String& value)
{
// This mimics the CoreIPC binary encoding of Strings prior to r88886.
// Whenever the CoreIPC binary encoding changes, we'll have to "undo" the changes here.
// FIXME: We shouldn't use the CoreIPC binary encoding format for history,
// and we should come up with a migration strategy so we can actually bump the version number
// without breaking encoding/decoding of the history tree.
uint32_t length;
if (!m_decoder.decode(length))
return false;
if (length == std::numeric_limits<uint32_t>::max()) {
// This is the null string.
value = String();
return true;
}
uint64_t lengthInBytes;
if (!m_decoder.decode(lengthInBytes))
return false;
if (lengthInBytes % sizeof(UChar) || lengthInBytes / sizeof(UChar) != length) {
m_decoder.markInvalid();
return false;
}
if (!m_decoder.bufferIsLargeEnoughToContain<UChar>(length)) {
m_decoder.markInvalid();
return false;
}
UChar* buffer;
String string = String::createUninitialized(length, buffer);
if (!m_decoder.decodeFixedLengthData(reinterpret_cast<uint8_t*>(buffer), length * sizeof(UChar), __alignof(UChar)))
return false;
value = string;
return true;
}
}
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