133 lines
3.3 KiB
C++
133 lines
3.3 KiB
C++
/*
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* Copyright (C) 2010, 2014 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include <wtf/persistence/PersistentEncoder.h>
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#include <wtf/SHA1.h>
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namespace WTF {
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namespace Persistence {
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Encoder::Encoder()
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{
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}
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Encoder::~Encoder()
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{
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}
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uint8_t* Encoder::grow(size_t size)
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{
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size_t newPosition = m_buffer.size();
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m_buffer.grow(m_buffer.size() + size);
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return m_buffer.data() + newPosition;
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}
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void Encoder::updateChecksumForData(SHA1& sha1, Span<const uint8_t> span)
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{
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auto typeSalt = Salt<uint8_t*>::value;
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sha1.addBytes(reinterpret_cast<uint8_t*>(&typeSalt), sizeof(typeSalt));
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sha1.addBytes(span.data(), span.size());
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}
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void Encoder::encodeFixedLengthData(Span<const uint8_t> span)
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{
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updateChecksumForData(m_sha1, span);
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uint8_t* buffer = grow(span.size());
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memcpy(buffer, span.data(), span.size());
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}
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template<typename Type>
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Encoder& Encoder::encodeNumber(Type value)
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{
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Encoder::updateChecksumForNumber(m_sha1, value);
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uint8_t* buffer = grow(sizeof(Type));
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memcpy(buffer, &value, sizeof(Type));
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return *this;
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}
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Encoder& Encoder::operator<<(bool value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(uint8_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(uint16_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(int16_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(uint32_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(uint64_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(int32_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(int64_t value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(float value)
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{
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return encodeNumber(value);
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}
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Encoder& Encoder::operator<<(double value)
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{
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return encodeNumber(value);
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}
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void Encoder::encodeChecksum()
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{
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SHA1::Digest hash;
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m_sha1.computeHash(hash);
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encodeFixedLengthData({ hash.data(), hash.size() });
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}
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}
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}
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