1 files changed, 45 insertions, 0 deletions
diff --git a/src/rocksdb/db/log_format.h b/src/rocksdb/db/log_format.h
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+++ b/src/rocksdb/db/log_format.h
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+//  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under both the GPLv2 (found in the
+//  COPYING file in the root directory) and Apache 2.0 License
+//  (found in the LICENSE.Apache file in the root directory).
+//
+// 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.
+//
+// Log format information shared by reader and writer.
+// See ../doc/log_format.txt for more detail.
+
+#pragma once
+namespace rocksdb {
+namespace log {
+
+enum RecordType {
+  // Zero is reserved for preallocated files
+  kZeroType = 0,
+  kFullType = 1,
+
+  // For fragments
+  kFirstType = 2,
+  kMiddleType = 3,
+  kLastType = 4,
+
+  // For recycled log files
+  kRecyclableFullType = 5,
+  kRecyclableFirstType = 6,
+  kRecyclableMiddleType = 7,
+  kRecyclableLastType = 8,
+};
+static const int kMaxRecordType = kRecyclableLastType;
+
+static const unsigned int kBlockSize = 32768;
+
+// Header is checksum (4 bytes), length (2 bytes), type (1 byte)
+static const int kHeaderSize = 4 + 2 + 1;
+
+// Recyclable header is checksum (4 bytes), length (2 bytes), type (1 byte),
+// log number (4 bytes).
+static const int kRecyclableHeaderSize = 4 + 2 + 1 + 4;
+
+}  // namespace log
+}  // namespace rocksdb