1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef CORE_IO_ROFS_FILESYSTEM_H
17 #define CORE_IO_ROFS_FILESYSTEM_H
18
19 #include <cstddef>
20 #include <cstdint>
21
22 #include <base/containers/array_view.h>
23 #include <base/containers/string.h>
24 #include <base/containers/string_view.h>
25 #include <base/containers/unordered_map.h>
26 #include <base/containers/vector.h>
27 #include <base/namespace.h>
28 #include <core/io/intf_directory.h>
29 #include <core/io/intf_file.h>
30 #include <core/io/intf_file_system.h>
31 #include <core/namespace.h>
32
CORE_BEGIN_NAMESPACE()33 CORE_BEGIN_NAMESPACE()
34 /** Rofs protocol.
35 * Protocol implementation that wraps a RO constant buffer in memory.
36 */
37 class RoFileSystem final : public IFilesystem {
38 public:
39 RoFileSystem(const void* const blob, size_t blobSize);
40 ~RoFileSystem() override = default;
41 RoFileSystem(RoFileSystem const&) = delete;
42 RoFileSystem& operator=(RoFileSystem const&) = delete;
43
44 IDirectory::Entry GetEntry(BASE_NS::string_view uri) override;
45 IFile::Ptr OpenFile(BASE_NS::string_view path, IFile::Mode mode) override;
46 IFile::Ptr CreateFile(BASE_NS::string_view path) override;
47 bool DeleteFile(BASE_NS::string_view path) override;
48 bool FileExists(BASE_NS::string_view path) const override;
49
50 IDirectory::Ptr OpenDirectory(BASE_NS::string_view path) override;
51 IDirectory::Ptr CreateDirectory(BASE_NS::string_view path) override;
52 bool DeleteDirectory(BASE_NS::string_view path) override;
53 bool DirectoryExists(BASE_NS::string_view path) const override;
54
55 bool Rename(BASE_NS::string_view fromPath, BASE_NS::string_view toPath) override;
56
57 BASE_NS::vector<BASE_NS::string> GetUriPaths(BASE_NS::string_view uri) const override;
58
59 protected:
60 void Destroy() override
61 {
62 delete this;
63 }
64
65 private:
66 BASE_NS::unordered_map<BASE_NS::string, BASE_NS::vector<IDirectory::Entry>> directories_;
67 BASE_NS::unordered_map<BASE_NS::string, BASE_NS::array_view<const uint8_t>> files_;
68 };
69 CORE_END_NAMESPACE()
70
71 #endif // CORE_IO_ROFS_FILESYSTEM_H
72