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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/**
* \file RecordHeader.cpp
*/
#include "RecordHeader.h"
#include "Configuration.h"
namespace qpid {
namespace asyncStore {
namespace jrnl2 {
RecordHeader::RecordHeader() :
m_magic(0),
m_version(0),
m_bigEndianFlag(0),
m_flags(0),
m_recordId(0)
{}
RecordHeader::RecordHeader(const uint32_t magic,
const uint8_t version,
const uint64_t recordId,
const bool overwriteIndicator) :
m_magic(magic),
m_version(version),
m_bigEndianFlag(Configuration::s_endianValue),
m_flags(overwriteIndicator ? HDR_OVERWRITE_INDICATOR_MASK : 0),
m_recordId(recordId)
{}
RecordHeader::RecordHeader(const RecordHeader& rh) :
m_magic(rh.m_magic),
m_version(rh.m_version),
m_bigEndianFlag(rh.m_bigEndianFlag),
m_flags(rh.m_flags),
m_recordId(rh.m_recordId)
{}
RecordHeader::~RecordHeader() {}
void
RecordHeader::copy(const RecordHeader& rh) {
m_magic = rh.m_magic;
m_version = rh.m_version;
m_bigEndianFlag = rh.m_bigEndianFlag;
m_flags = rh.m_flags;
m_recordId = rh.m_recordId;
}
void
RecordHeader::reset() {
m_magic = 0;
m_version = 0;
m_bigEndianFlag = 0;
m_flags = 0;
m_recordId = 0;
}
bool
RecordHeader::getOverwriteIndicator() const {
return m_flags & HDR_OVERWRITE_INDICATOR_MASK;
}
void
RecordHeader::setOverwriteIndicator(const bool owi) {
m_flags = owi ?
m_flags | HDR_OVERWRITE_INDICATOR_MASK :
m_flags & (~HDR_OVERWRITE_INDICATOR_MASK);
}
//static
uint64_t
RecordHeader::getHeaderSize() {
return static_cast<uint64_t>(sizeof(RecordHeader));
}
uint32_t
RecordHeader::getCheckSum(uint32_t initialValue) const {
uint32_t cs = initialValue;
for (unsigned char* p = (unsigned char*)this;
p < (unsigned char*)this + getHeaderSize() + getBodySize();
p++) {
cs ^= (uint32_t)(*p);
bool carry = cs & uint32_t(0x80000000);
cs <<= 1;
if (carry) cs++;
}
return cs;
}
}}} // namespace qpid::asyncStore::jrnl2
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