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Diffstat (limited to 'src/mongo/db/btreeposition.cpp')
| -rw-r--r-- | src/mongo/db/btreeposition.cpp | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/src/mongo/db/btreeposition.cpp b/src/mongo/db/btreeposition.cpp deleted file mode 100644 index 290396f9bab..00000000000 --- a/src/mongo/db/btreeposition.cpp +++ /dev/null @@ -1,109 +0,0 @@ -/** - * Copyright (C) 2012 10gen 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. - */ - -#include "mongo/db/btreeposition.h" - -#include "mongo/db/btree.h" -#include "mongo/db/storage/index_details.h" -#include "mongo/db/pdfile.h" - -namespace mongo { - - std::ostream& operator<<( std::ostream& stream, const BtreeKeyLocation& loc ) { - return stream << BSON( "bucket" << loc.bucket.toString() << - "index" << loc.pos ).jsonString(); - } - - LogicalBtreePosition::LogicalBtreePosition( const IndexDetails& indexDetails, - Ordering ordering, - const BtreeKeyLocation& initialLocation ) : - _indexDetails( &indexDetails ), - _ordering( ordering ), - _initialLocation( initialLocation ), - _initialLocationValid() { - fassert( 16494, _indexDetails->version() == 1 ); - } - - void LogicalBtreePosition::init() { - if ( _initialLocation.bucket.isNull() ) { - // Abort if the initial location is not a valid bucket. - return; - } - - // Store the key and record referenced at the supplied initial location. - BucketBasics<V1>::KeyNode keyNode = - _initialLocation.bucket.btree<V1>()->keyNode( _initialLocation.pos ); - _key = keyNode.key.toBson().getOwned(); - _record = keyNode.recordLoc; - _initialLocationValid = true; - } - - BtreeKeyLocation LogicalBtreePosition::currentLocation() const { - if ( _initialLocation.bucket.isNull() ) { - // Abort if the initial location is not a valid bucket. - return BtreeKeyLocation(); - } - - // If the initial location has not been invalidated ... - if ( _initialLocationValid ) { - - const BtreeBucket<V1>* bucket = _initialLocation.bucket.btree<V1>(); - if ( // ... and the bucket was not marked as invalid ... - bucket->getN() != bucket->INVALID_N_SENTINEL && - // ... and the initial location index is valid for the bucket ... - _initialLocation.pos < bucket->getN() ) { - - BucketBasics<V1>::KeyNode keyNode = bucket->keyNode( _initialLocation.pos ); - if ( // ... and the record location equals the initial record location ... - keyNode.recordLoc == _record && - // ... and the key equals the initial key ... - keyNode.key.toBson().binaryEqual( _key ) ) { - // ... then the initial location is the current location, so return it. - return _initialLocation; - } - } - } - - // Relocate the key and record location retrieved from _initialLocation. - BtreeKeyLocation ret; - bool found; - ret.bucket = _indexDetails->head.btree<V1>()->locate( *_indexDetails, - _indexDetails->head, - _key, - _ordering, - ret.pos, - found, - _record, - 1 // Forward direction means the next - // ordered key will be returned if - // the requested key is missing. - ); - return ret; - } - -} // namespace mongo |