You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.4 KiB
44 lines
1.4 KiB
// Copyright (c) 2017 Couchbase, Inc.
|
|
//
|
|
// Licensed 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.
|
|
|
|
package zap
|
|
|
|
import "encoding/binary"
|
|
|
|
func (s *SegmentBase) getDocStoredMetaAndCompressed(docNum uint64) ([]byte, []byte) {
|
|
_, storedOffset, n, metaLen, dataLen := s.getDocStoredOffsets(docNum)
|
|
|
|
meta := s.mem[storedOffset+n : storedOffset+n+metaLen]
|
|
data := s.mem[storedOffset+n+metaLen : storedOffset+n+metaLen+dataLen]
|
|
|
|
return meta, data
|
|
}
|
|
|
|
func (s *SegmentBase) getDocStoredOffsets(docNum uint64) (
|
|
uint64, uint64, uint64, uint64, uint64) {
|
|
indexOffset := s.storedIndexOffset + (8 * docNum)
|
|
|
|
storedOffset := binary.BigEndian.Uint64(s.mem[indexOffset : indexOffset+8])
|
|
|
|
var n uint64
|
|
|
|
metaLen, read := binary.Uvarint(s.mem[storedOffset : storedOffset+binary.MaxVarintLen64])
|
|
n += uint64(read)
|
|
|
|
dataLen, read := binary.Uvarint(s.mem[storedOffset+n : storedOffset+n+binary.MaxVarintLen64])
|
|
n += uint64(read)
|
|
|
|
return indexOffset, storedOffset, n, metaLen, dataLen
|
|
}
|