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       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                 :             : #ifndef STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_
       6                 :             : #define STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_
       7                 :             : 
       8                 :             : #include "db/dbformat.h"
       9                 :             : #include "leveldb/write_batch.h"
      10                 :             : 
      11                 :             : namespace leveldb {
      12                 :             : 
      13                 :             : class MemTable;
      14                 :             : 
      15                 :             : // WriteBatchInternal provides static methods for manipulating a
      16                 :             : // WriteBatch that we don't want in the public WriteBatch interface.
      17                 :             : class WriteBatchInternal {
      18                 :             :  public:
      19                 :             :   // Return the number of entries in the batch.
      20                 :             :   static int Count(const WriteBatch* batch);
      21                 :             : 
      22                 :             :   // Set the count for the number of entries in the batch.
      23                 :             :   static void SetCount(WriteBatch* batch, int n);
      24                 :             : 
      25                 :             :   // Return the sequence number for the start of this batch.
      26                 :             :   static SequenceNumber Sequence(const WriteBatch* batch);
      27                 :             : 
      28                 :             :   // Store the specified number as the sequence number for the start of
      29                 :             :   // this batch.
      30                 :             :   static void SetSequence(WriteBatch* batch, SequenceNumber seq);
      31                 :             : 
      32   [ -  +  +  - ]:       41172 :   static Slice Contents(const WriteBatch* batch) { return Slice(batch->rep_); }
      33                 :             : 
      34   [ -  +  +  +  :       41172 :   static size_t ByteSize(const WriteBatch* batch) { return batch->rep_.size(); }
             -  -  -  - ]
      35                 :             : 
      36                 :             :   static void SetContents(WriteBatch* batch, const Slice& contents);
      37                 :             : 
      38                 :             :   static Status InsertInto(const WriteBatch* batch, MemTable* memtable);
      39                 :             : 
      40                 :             :   static void Append(WriteBatch* dst, const WriteBatch* src);
      41                 :             : };
      42                 :             : 
      43                 :             : }  // namespace leveldb
      44                 :             : 
      45                 :             : #endif  // STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_