1 | // Copyright (c) 2011 The LevelDB Authors. All rights reserved. |
2 | // Use of this source code is governed by a BSD-style license that can be |
3 | // found in the LICENSE file. See the AUTHORS file for names of contributors. |
4 | // |
5 | // Log format information shared by reader and writer. |
6 | // See ../doc/log_format.md for more detail. |
7 | |
8 | #ifndef STORAGE_LEVELDB_DB_LOG_FORMAT_H_ |
9 | #define STORAGE_LEVELDB_DB_LOG_FORMAT_H_ |
10 | |
11 | namespace leveldb { |
12 | namespace log { |
13 | |
14 | enum RecordType { |
15 | // Zero is reserved for preallocated files |
16 | kZeroType = 0, |
17 | |
18 | kFullType = 1, |
19 | |
20 | // For fragments |
21 | kFirstType = 2, |
22 | kMiddleType = 3, |
23 | kLastType = 4 |
24 | }; |
25 | static const int kMaxRecordType = kLastType; |
26 | |
27 | static const int kBlockSize = 32768; |
28 | |
29 | // Header is checksum (4 bytes), length (2 bytes), type (1 byte). |
30 | static const int = 4 + 2 + 1; |
31 | |
32 | } // namespace log |
33 | } // namespace leveldb |
34 | |
35 | #endif // STORAGE_LEVELDB_DB_LOG_FORMAT_H_ |
36 | |