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      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   /** Factory method to create a filter from a list of configuration::Abi. */
     37   static std::unique_ptr<AbiFilter> FromAbiList(const std::vector<configuration::Abi>& abi_list);
     38 
     39   /** Returns true if the path is for a native library in the list of desired ABIs. */
     40   bool Keep(const std::string& path) override;
     41 
     42  private:
     43   explicit AbiFilter(std::unordered_set<std::string> abis) : abis_(std::move(abis)) {
     44   }
     45 
     46   /** The path prefix to where all native libs end up inside an APK file. */
     47   static constexpr const char* kLibPrefix = "lib/";
     48   static constexpr size_t kLibPrefixLen = 4;
     49   const std::unordered_set<std::string> abis_;
     50 };
     51 
     52 }  // namespace aapt
     53 
     54 #endif  // AAPT2_ABISPLITTER_H
     55