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1 /*
2  * Copyright (C) 2015 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 #include "ResourceTable.h"
18 #include "link/Linkers.h"
19 
20 #include <algorithm>
21 #include <iterator>
22 
23 namespace aapt {
24 
25 template <typename InputContainer, typename OutputIterator, typename Predicate>
moveIf(InputContainer & inputContainer,OutputIterator result,Predicate pred)26 OutputIterator moveIf(InputContainer& inputContainer, OutputIterator result,
27                       Predicate pred) {
28     const auto last = inputContainer.end();
29     auto newEnd = std::find_if(inputContainer.begin(), inputContainer.end(), pred);
30     if (newEnd == last) {
31         return result;
32     }
33 
34     *result = std::move(*newEnd);
35 
36     auto first = newEnd;
37     ++first;
38 
39     for (; first != last; ++first) {
40         if (bool(pred(*first))) {
41             // We want to move this guy
42             *result = std::move(*first);
43             ++result;
44         } else {
45             // We want to keep this guy, but we will need to move it up the list to replace
46             // missing items.
47             *newEnd = std::move(*first);
48             ++newEnd;
49         }
50     }
51 
52     inputContainer.erase(newEnd, last);
53     return result;
54 }
55 
consume(IAaptContext * context,ResourceTable * table)56 bool PrivateAttributeMover::consume(IAaptContext* context, ResourceTable* table) {
57     for (auto& package : table->packages) {
58         ResourceTableType* type = package->findType(ResourceType::kAttr);
59         if (!type) {
60             continue;
61         }
62 
63         if (type->symbolStatus.state != SymbolState::kPublic) {
64             // No public attributes, so we can safely leave these private attributes where they are.
65             return true;
66         }
67 
68         ResourceTableType* privAttrType = package->findOrCreateType(ResourceType::kAttrPrivate);
69         assert(privAttrType->entries.empty());
70 
71         moveIf(type->entries, std::back_inserter(privAttrType->entries),
72                [](const std::unique_ptr<ResourceEntry>& entry) -> bool {
73                    return entry->symbolStatus.state != SymbolState::kPublic;
74                });
75         break;
76     }
77     return true;
78 }
79 
80 } // namespace aapt
81