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+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+//
+// File names used by DB code
+
+#ifndef STORAGE_LEVELDB_DB_FILENAME_H_
+#define STORAGE_LEVELDB_DB_FILENAME_H_
+
+#include <stdint.h>
+#include <string>
+#include "leveldb/slice.h"
+#include "leveldb/status.h"
+#include "port/port.h"
+
+namespace leveldb {
+
+class Env;
+
+enum FileType {
+ kLogFile,
+ kDBLockFile,
+ kTableFile,
+ kDescriptorFile,
+ kCurrentFile,
+ kTempFile,
+ kInfoLogFile // Either the current one, or an old one
+};
+
+// Return the name of the log file with the specified number
+// in the db named by "dbname". The result will be prefixed with
+// "dbname".
+extern std::string LogFileName(const std::string& dbname, uint64_t number);
+
+// Return the name of the sstable with the specified number
+// in the db named by "dbname". The result will be prefixed with
+// "dbname".
+extern std::string TableFileName(const std::string& dbname, uint64_t number);
+
+// Return the legacy file name for an sstable with the specified number
+// in the db named by "dbname". The result will be prefixed with
+// "dbname".
+extern std::string SSTTableFileName(const std::string& dbname, uint64_t number);
+
+// Return the name of the descriptor file for the db named by
+// "dbname" and the specified incarnation number. The result will be
+// prefixed with "dbname".
+extern std::string DescriptorFileName(const std::string& dbname,
+ uint64_t number);
+
+// Return the name of the current file. This file contains the name
+// of the current manifest file. The result will be prefixed with
+// "dbname".
+extern std::string CurrentFileName(const std::string& dbname);
+
+// Return the name of the lock file for the db named by
+// "dbname". The result will be prefixed with "dbname".
+extern std::string LockFileName(const std::string& dbname);
+
+// Return the name of a temporary file owned by the db named "dbname".
+// The result will be prefixed with "dbname".
+extern std::string TempFileName(const std::string& dbname, uint64_t number);
+
+// Return the name of the info log file for "dbname".
+extern std::string InfoLogFileName(const std::string& dbname);
+
+// Return the name of the old info log file for "dbname".
+extern std::string OldInfoLogFileName(const std::string& dbname);
+
+// If filename is a leveldb file, store the type of the file in *type.
+// The number encoded in the filename is stored in *number. If the
+// filename was successfully parsed, returns true. Else return false.
+extern bool ParseFileName(const std::string& filename,
+ uint64_t* number,
+ FileType* type);
+
+// Make the CURRENT file point to the descriptor file with the
+// specified number.
+extern Status SetCurrentFile(Env* env, const std::string& dbname,
+ uint64_t descriptor_number);
+
+
+} // namespace leveldb
+
+#endif // STORAGE_LEVELDB_DB_FILENAME_H_