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/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/storage/mmap_v1/btree/btree_ondisk.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
namespace mongo {
void DiskLoc56Bit::operator=(const DiskLoc& loc) {
ofs = loc.getOfs();
int la = loc.a();
if (la == maxDiskLoc.a()) {
invariant(ofs == maxDiskLoc.getOfs());
la = OurMaxA;
}
invariant( la <= OurMaxA ); // must fit in 3 bytes
if( la < 0 ) {
if ( la != -1 ) {
log() << "btree diskloc isn't negative 1: " << la << std::endl;
invariant ( la == -1 );
}
la = 0;
ofs = OurNullOfs;
}
memcpy(_a, &la, 3); // endian
}
} // namespace mongo
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