1 /*
2  * Copyright (C) 2017 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 AAPT2_ABISPLITTER_H
18 #define AAPT2_ABISPLITTER_H
19 
20 #include <memory>
21 #include <string>
22 #include <unordered_set>
23 #include <vector>
24 
25 #include "configuration/ConfigurationParser.h"
26 #include "filter/Filter.h"
27 
28 namespace aapt {
29 
30 /**
31  * Filters native library paths by ABI. ABIs present in the filter list are kept and all over
32  * libraries are removed. The filter is only applied to native library paths (this under lib/).
33  */
34 class AbiFilter : public IPathFilter {
35  public:
36   virtual ~AbiFilter() = default;
37 
38   /** Factory method to create a filter from a list of configuration::Abi. */
39   static std::unique_ptr<AbiFilter> FromAbiList(const std::vector<configuration::Abi>& abi_list);
40 
41   /** Returns true if the path is for a native library in the list of desired ABIs. */
42   bool Keep(const std::string& path) override;
43 
44  private:
AbiFilter(std::unordered_set<std::string> abis)45   explicit AbiFilter(std::unordered_set<std::string> abis) : abis_(std::move(abis)) {
46   }
47 
48   /** The path prefix to where all native libs end up inside an APK file. */
49   static constexpr const char* kLibPrefix = "lib/";
50   static constexpr size_t kLibPrefixLen = 4;
51   const std::unordered_set<std::string> abis_;
52 };
53 
54 }  // namespace aapt
55 
56 #endif  // AAPT2_ABISPLITTER_H
57