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// File names used by DB code 6 7#ifndef STORAGE_LEVELDB_DB_FILENAME_H_ 8#define STORAGE_LEVELDB_DB_FILENAME_H_ 9 10#include <stdint.h> 11#include <string> 12#include "leveldb/slice.h" 13#include "leveldb/status.h" 14#include "port/port.h" 15 16namespace leveldb { 17 18class Env; 19 20enum FileType { 21 kLogFile, 22 kDBLockFile, 23 kTableFile, 24 kDescriptorFile, 25 kCurrentFile, 26 kTempFile, 27 kInfoLogFile // Either the current one, or an old one 28}; 29 30// Return the name of the log file with the specified number 31// in the db named by "dbname". The result will be prefixed with 32// "dbname". 33extern std::string LogFileName(const std::string& dbname, uint64_t number); 34 35// Return the name of the sstable with the specified number 36// in the db named by "dbname". The result will be prefixed with 37// "dbname". 38extern std::string TableFileName(const std::string& dbname, uint64_t number); 39 40// Return the legacy file name for an sstable with the specified number 41// in the db named by "dbname". The result will be prefixed with 42// "dbname". 43extern std::string SSTTableFileName(const std::string& dbname, uint64_t number); 44 45// Return the name of the descriptor file for the db named by 46// "dbname" and the specified incarnation number. The result will be 47// prefixed with "dbname". 48extern std::string DescriptorFileName(const std::string& dbname, 49 uint64_t number); 50 51// Return the name of the current file. This file contains the name 52// of the current manifest file. The result will be prefixed with 53// "dbname". 54extern std::string CurrentFileName(const std::string& dbname); 55 56// Return the name of the lock file for the db named by 57// "dbname". The result will be prefixed with "dbname". 58extern std::string LockFileName(const std::string& dbname); 59 60// Return the name of a temporary file owned by the db named "dbname". 61// The result will be prefixed with "dbname". 62extern std::string TempFileName(const std::string& dbname, uint64_t number); 63 64// Return the name of the info log file for "dbname". 65extern std::string InfoLogFileName(const std::string& dbname); 66 67// Return the name of the old info log file for "dbname". 68extern std::string OldInfoLogFileName(const std::string& dbname); 69 70// If filename is a leveldb file, store the type of the file in *type. 71// The number encoded in the filename is stored in *number. If the 72// filename was successfully parsed, returns true. Else return false. 73extern bool ParseFileName(const std::string& filename, 74 uint64_t* number, 75 FileType* type); 76 77// Make the CURRENT file point to the descriptor file with the 78// specified number. 79extern Status SetCurrentFile(Env* env, const std::string& dbname, 80 uint64_t descriptor_number); 81 82 83} // namespace leveldb 84 85#endif // STORAGE_LEVELDB_DB_FILENAME_H_ 86