1/*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef OHOS_IDL_STRINGPOOL_H
17#define OHOS_IDL_STRINGPOOL_H
18
19#include <unordered_map>
20#include <string>
21#include <cstddef>
22#include "util/string_helper.h"
23
24namespace OHOS {
25namespace Idl {
26class StringPool {
27public:
28    StringPool();
29
30    ~StringPool();
31
32    void Add(const std::string& string);
33
34    ptrdiff_t GetOffset(const std::string& string);
35
36    size_t GetSize()
37    {
38        return dataOffset_;
39    }
40
41    uint8_t* GetData()
42    {
43        return data_;
44    }
45
46private:
47    ptrdiff_t AddInternal(const std::string& string);
48
49    bool Grow(size_t expand);
50
51    static const char* TAG;
52    uint8_t* data_ = nullptr;
53    size_t dataCapacity_ = 256;
54    ptrdiff_t dataOffset_ = 0;
55    std::unordered_map<std::string, ptrdiff_t, StringHashFunc, StringEqualFunc> stringOffsets_;
56};
57}
58}
59#endif // OHOS_IDL_STRINGPOOL_H
60