1 /*
2  * Copyright (C) 2016 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 APKASSETS_H_
18 #define APKASSETS_H_
19 
20 #include <memory>
21 #include <string>
22 
23 #include "android-base/macros.h"
24 #include "ziparchive/zip_archive.h"
25 
26 #include "androidfw/Asset.h"
27 #include "androidfw/LoadedArsc.h"
28 #include "androidfw/misc.h"
29 
30 namespace android {
31 
32 // Holds an APK.
33 class ApkAssets {
34  public:
35   static std::unique_ptr<const ApkAssets> Load(const std::string& path, bool system = false);
36   static std::unique_ptr<const ApkAssets> LoadAsSharedLibrary(const std::string& path,
37                                                               bool system = false);
38 
39   std::unique_ptr<Asset> Open(const std::string& path,
40                               Asset::AccessMode mode = Asset::AccessMode::ACCESS_RANDOM) const;
41 
42   bool ForEachFile(const std::string& path,
43                    const std::function<void(const StringPiece&, FileType)>& f) const;
44 
GetPath()45   inline const std::string& GetPath() const { return path_; }
46 
GetLoadedArsc()47   inline const LoadedArsc* GetLoadedArsc() const { return loaded_arsc_.get(); }
48 
49  private:
50   DISALLOW_COPY_AND_ASSIGN(ApkAssets);
51 
52   static std::unique_ptr<const ApkAssets> LoadImpl(const std::string& path, bool system,
53                                                    bool load_as_shared_library);
54 
55   ApkAssets() = default;
56 
57   struct ZipArchivePtrCloser {
operatorZipArchivePtrCloser58     void operator()(::ZipArchiveHandle handle) { ::CloseArchive(handle); }
59   };
60 
61   using ZipArchivePtr =
62       std::unique_ptr<typename std::remove_pointer<::ZipArchiveHandle>::type, ZipArchivePtrCloser>;
63 
64   ZipArchivePtr zip_handle_;
65   std::string path_;
66   std::unique_ptr<Asset> resources_asset_;
67   std::unique_ptr<const LoadedArsc> loaded_arsc_;
68 };
69 
70 }  // namespace android
71 
72 #endif /* APKASSETS_H_ */
73