1// Copyright (c) 2017 Couchbase, Inc. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15package zap 16 17import "encoding/binary" 18 19func (s *SegmentBase) getDocStoredMetaAndCompressed(docNum uint64) ([]byte, []byte) { 20 _, storedOffset, n, metaLen, dataLen := s.getDocStoredOffsets(docNum) 21 22 meta := s.mem[storedOffset+n : storedOffset+n+metaLen] 23 data := s.mem[storedOffset+n+metaLen : storedOffset+n+metaLen+dataLen] 24 25 return meta, data 26} 27 28func (s *SegmentBase) getDocStoredOffsets(docNum uint64) ( 29 uint64, uint64, uint64, uint64, uint64) { 30 indexOffset := s.storedIndexOffset + (8 * docNum) 31 32 storedOffset := binary.BigEndian.Uint64(s.mem[indexOffset : indexOffset+8]) 33 34 var n uint64 35 36 metaLen, read := binary.Uvarint(s.mem[storedOffset : storedOffset+binary.MaxVarintLen64]) 37 n += uint64(read) 38 39 dataLen, read := binary.Uvarint(s.mem[storedOffset+n : storedOffset+n+binary.MaxVarintLen64]) 40 n += uint64(read) 41 42 return indexOffset, storedOffset, n, metaLen, dataLen 43} 44