TypeWrappers.h revision 03b5d506bc2735e080863712d9d2e8ce6f7ecb43 
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            return *this;
34        }
35
36        bool operator==(const iterator& rhs) const {
37            return mTypeVariant == rhs.mTypeVariant && mIndex == rhs.mIndex;
38        }
39
40        bool operator!=(const iterator& rhs) const {
41            return mTypeVariant != rhs.mTypeVariant || mIndex != rhs.mIndex;
42        }
43
44        iterator operator++(int) {
45            uint32_t prevIndex = mIndex;
46            operator++();
47            return iterator(mTypeVariant, prevIndex);
48        }
49
50        const ResTable_entry* operator->() const {
51            return operator*();
52        }
53
54        uint32_t index() const {
55            return mIndex;
56        }
57
58        iterator& operator++();
59        const ResTable_entry* operator*() const;
60
61    private:
62        friend struct TypeVariant;
63        iterator(const TypeVariant* tv, uint32_t index)
64            : mTypeVariant(tv), mIndex(index) {}
65        const TypeVariant* mTypeVariant;
66        uint32_t mIndex;
67    };
68
69    iterator beginEntries() const {
70        return iterator(this, 0);
71    }
72
73    iterator endEntries() const {
74        return iterator(this, dtohl(data->entryCount));
75    }
76
77    const ResTable_type* data;
78};
79
80} // namespace android
81
82#endif // __TYPE_WRAPPERS_H
83