github.com/cellofellow/gopkg@v0.0.0-20140722061823-eec0544a62ad/database/leveldb.chai2010/include/db/log_format.h (about)

     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.txt 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), type (1 byte), length (2 bytes).
    30  static const int kHeaderSize = 4 + 1 + 2;
    31  
    32  }  // namespace log
    33  }  // namespace leveldb
    34  
    35  #endif  // STORAGE_LEVELDB_DB_LOG_FORMAT_H_