1/*
2 * Copyright (C) 2013, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef LATINIME_SPARSE_TABLE_H
18#define LATINIME_SPARSE_TABLE_H
19
20#include <cstdint>
21
22#include "defines.h"
23#include "dictionary/utils/buffer_with_extendable_buffer.h"
24
25namespace latinime {
26
27// TODO: Support multiple content buffers.
28class SparseTable {
29 public:
30    SparseTable(BufferWithExtendableBuffer *const indexTableBuffer,
31            BufferWithExtendableBuffer *const contentTableBuffer, const int blockSize,
32            const int dataSize)
33            : mIndexTableBuffer(indexTableBuffer), mContentTableBuffer(contentTableBuffer),
34              mBlockSize(blockSize), mDataSize(dataSize) {}
35
36    bool contains(const int id) const;
37
38    uint32_t get(const int id) const;
39
40    bool set(const int id, const uint32_t value);
41
42 private:
43    DISALLOW_IMPLICIT_CONSTRUCTORS(SparseTable);
44
45    int getIndexFromContentTablePos(const int contentTablePos) const;
46
47    int getPosInIndexTable(const int id) const;
48
49    int getPosInContentTable(const int id, const int index) const;
50
51    static const int NOT_EXIST;
52    static const int INDEX_SIZE;
53
54    BufferWithExtendableBuffer *const mIndexTableBuffer;
55    BufferWithExtendableBuffer *const mContentTableBuffer;
56    const int mBlockSize;
57    const int mDataSize;
58};
59} // namespace latinime
60#endif /* LATINIME_SPARSE_TABLE_H */
61