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 #include <utils/ByteOrder.h>
22 
23 namespace android {
24 
25 struct TypeVariant {
26     explicit TypeVariant(const ResTable_type* 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 
indexTypeVariant54         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;
iteratorTypeVariant63         iterator(const TypeVariant* tv, uint32_t index)
64             : mTypeVariant(tv), mIndex(index) {}
65         const TypeVariant* mTypeVariant;
66         uint32_t mIndex;
67     };
68 
beginEntriesTypeVariant69     iterator beginEntries() const {
70         return iterator(this, 0);
71     }
72 
endEntriesTypeVariant73     iterator endEntries() const {
74         return iterator(this, mLength);
75     }
76 
77     const ResTable_type* data;
78 
79 private:
80     size_t mLength;
81 };
82 
83 } // namespace android
84 
85 #endif // __TYPE_WRAPPERS_H
86