1/*
2 * Copyright (c) 2023 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 TEST_FUZZTEST_DATA_SOURCE_H
17#define TEST_FUZZTEST_DATA_SOURCE_H
18
19#include <string>
20#include <vector>
21#include <cstdint>
22#include <securec.h>
23
24namespace OHOS::Rosen {
25class DataSource  {
26public:
27    DataSource(const std::uint8_t* data, size_t size) : data_(data), size_(size), pos_(0) {}
28
29    template<class T>
30    T GetObject()
31    {
32        T object{};
33        auto objSize = sizeof(object);
34        if (!data_ || (objSize > size_ - pos_)) {
35            return object;
36        }
37        auto ret = memcpy_s(&object, objSize, data_ + pos_, objSize);
38        if (ret != EOK) {
39            return {};
40        }
41        pos_ += objSize;
42        return object;
43    }
44
45    const std::uint8_t* GetRaw(size_t rawSize)
46    {
47        if (!data_ || (rawSize > size_ - pos_)) {
48            return nullptr;
49        }
50        auto current = pos_;
51        pos_ += rawSize;
52        return data_ + current;
53    }
54
55    std::string GetString()
56    {
57        size_t num = GetObject<uint8_t>();
58        std::string str;
59        str.resize(num);
60        auto rawSize = sizeof(std::string::value_type) * num;
61        auto buf =  GetRaw(rawSize);
62        if (buf) {
63            memcpy_s(str.data(), rawSize, buf, rawSize);
64        }
65        return str;
66    }
67
68    const std::uint8_t* data_;
69    size_t size_;
70    size_t pos_;
71};
72}
73
74#endif
75