1/*
2 * Copyright (C) 2014 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 __TYPE_WRAPPERS_H
18#define __TYPE_WRAPPERS_H
19
20#include <androidfw/ResourceTypes.h>
21
22namespace android {
23
24struct TypeVariant {
25    TypeVariant(const ResTable_type* data)
26        : data(data) {}
27
28    class iterator {
29    public:
30        iterator& operator=(const iterator& rhs) {
31            mTypeVariant = rhs.mTypeVariant;
32            mIndex = rhs.mIndex;
33        }
34
35        bool operator==(const iterator& rhs) const {
36            return mTypeVariant == rhs.mTypeVariant && mIndex == rhs.mIndex;
37        }
38
39        bool operator!=(const iterator& rhs) const {
40            return mTypeVariant != rhs.mTypeVariant || mIndex != rhs.mIndex;
41        }
42
43        iterator operator++(int) {
44            uint32_t prevIndex = mIndex;
45            operator++();
46            return iterator(mTypeVariant, prevIndex);
47        }
48
49        const ResTable_entry* operator->() const {
50            return operator*();
51        }
52
53        uint32_t index() const {
54            return mIndex;
55        }
56
57        iterator& operator++();
58        const ResTable_entry* operator*() const;
59
60    private:
61        friend struct TypeVariant;
62        iterator(const TypeVariant* tv, uint32_t index)
63            : mTypeVariant(tv), mIndex(index) {}
64        const TypeVariant* mTypeVariant;
65        uint32_t mIndex;
66    };
67
68    iterator beginEntries() const {
69        return iterator(this, 0);
70    }
71
72    iterator endEntries() const {
73        return iterator(this, dtohl(data->entryCount));
74    }
75
76    const ResTable_type* data;
77};
78
79} // namespace android
80
81#endif // __TYPE_WRAPPERS_H
82