1/*
2 * Copyright (c) 2022 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 FOUNDATION_MARSHALLING_HELPER_H
17#define FOUNDATION_MARSHALLING_HELPER_H
18
19#include <parcel.h>
20
21namespace OHOS::Rosen {
22class MarshallingHelper : public Parcelable {
23public:
24    MarshallingHelper() = delete;
25    template<class T>
26    static bool MarshallingVectorParcelableObj(Parcel& parcel, const std::vector<sptr<T>>& data)
27    {
28        if (data.size() > INT_MAX) {
29            return false;
30        }
31        if (!parcel.WriteInt32(static_cast<int32_t>(data.size()))) {
32            return false;
33        }
34        for (const auto &v : data) {
35            if (!parcel.WriteParcelable(v)) {
36                return false;
37            }
38        }
39        return true;
40    }
41
42    template<class T>
43    static bool UnmarshallingVectorParcelableObj(Parcel& parcel, std::vector<sptr<T>>& data)
44    {
45        int32_t len = parcel.ReadInt32();
46        if (len < 0) {
47            return false;
48        }
49
50        size_t readAbleSize = parcel.GetReadableBytes();
51        size_t size = static_cast<size_t>(len);
52        if ((size > readAbleSize) || (size > data.max_size())) {
53            return false;
54        }
55        data.resize(size);
56        if (data.size() < size) {
57            return false;
58        }
59        size_t minDesireCapacity = sizeof(int32_t);
60        for (size_t i = 0; i < size; i++) {
61            readAbleSize = parcel.GetReadableBytes();
62            if (minDesireCapacity > readAbleSize) {
63                return false;
64            }
65            data[i] = parcel.ReadParcelable<T>();
66            if (data[i] == nullptr) {
67                return false;
68            }
69        }
70        return true;
71    }
72
73    template<class T>
74    static bool MarshallingVectorObj(Parcel& parcel, const std::vector<T>& data,
75        std::function<bool(Parcel&, const T&)> func)
76    {
77        if (data.size() > INT_MAX) {
78            return false;
79        }
80        if (func == nullptr) {
81            return false;
82        }
83        if (!parcel.WriteInt32(static_cast<int32_t>(data.size()))) {
84            return false;
85        }
86        for (const auto &v : data) {
87            if (!func(parcel, v)) {
88                return false;
89            }
90        }
91        return true;
92    }
93
94    template<class T>
95    static bool UnmarshallingVectorObj(Parcel& parcel, std::vector<T>& data, std::function<bool(Parcel&, T&)> func)
96    {
97        if (func == nullptr) {
98            return false;
99        }
100        int32_t len = parcel.ReadInt32();
101        if (len < 0) {
102            return false;
103        }
104
105        size_t readAbleSize = parcel.GetReadableBytes();
106        size_t size = static_cast<size_t>(len);
107        if ((size > readAbleSize) || (size > data.max_size())) {
108            return false;
109        }
110        data.resize(size);
111        if (data.size() < size) {
112            return false;
113        }
114
115        for (size_t i = 0; i < size; i++) {
116            if (!func(parcel, data[i])) {
117                return false;
118            }
119        }
120        return true;
121    }
122};
123} // namespace OHOS::Rosen
124#endif // FOUNDATION_MARSHALLING_HELPER_H