1/* Copyright 2015 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7    http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#ifndef TENSORFLOW_LIB_IO_BLOCK_H_
17#define TENSORFLOW_LIB_IO_BLOCK_H_
18
19#include <stddef.h>
20#include <stdint.h>
21#include "tensorflow/core/lib/io/iterator.h"
22
23namespace tensorflow {
24namespace table {
25
26struct BlockContents;
27
28class Block {
29 public:
30  // Initialize the block with the specified contents.
31  explicit Block(const BlockContents& contents);
32
33  ~Block();
34
35  size_t size() const { return size_; }
36  Iterator* NewIterator();
37
38 private:
39  uint32 NumRestarts() const;
40
41  const char* data_;
42  size_t size_;
43  uint32 restart_offset_;  // Offset in data_ of restart array
44  bool owned_;             // Block owns data_[]
45
46  // No copying allowed
47  Block(const Block&);
48  void operator=(const Block&);
49
50  class Iter;
51};
52
53}  // namespace table
54}  // namespace tensorflow
55
56#endif  // TENSORFLOW_LIB_IO_BLOCK_H_
57