1 /* 2 * Copyright (c) 2022 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_MEMORY_FILESYSTEM_H 17 #define CORE_IO_MEMORY_FILESYSTEM_H 18 19 #include <base/containers/shared_ptr.h> 20 #include <base/containers/string.h> 21 #include <base/containers/string_view.h> 22 #include <base/containers/unordered_map.h> 23 #include <base/containers/vector.h> 24 #include <base/namespace.h> 25 #include <core/io/intf_directory.h> 26 #include <core/io/intf_file.h> 27 #include <core/io/intf_file_system.h> 28 #include <core/namespace.h> 29 30 CORE_BEGIN_NAMESPACE() 31 class MemoryFileStorage; 32 33 /** Memory protocol. 34 * Protocol implementation that wraps a buffer in memory. 35 */ 36 class MemoryFilesystem final : public IFilesystem { 37 public: 38 MemoryFilesystem() = default; 39 ~MemoryFilesystem() override = default; 40 MemoryFilesystem(MemoryFilesystem const&) = delete; 41 MemoryFilesystem& operator=(MemoryFilesystem const&) = delete; 42 43 IDirectory::Entry GetEntry(BASE_NS::string_view path) override; 44 IFile::Ptr OpenFile(BASE_NS::string_view path, IFile::Mode mode) override; 45 IFile::Ptr CreateFile(BASE_NS::string_view path) override; 46 bool DeleteFile(BASE_NS::string_view path) override; 47 bool FileExists(BASE_NS::string_view path) const override; 48 49 IDirectory::Ptr OpenDirectory(BASE_NS::string_view path) override; 50 IDirectory::Ptr CreateDirectory(BASE_NS::string_view path) override; 51 bool DeleteDirectory(BASE_NS::string_view path) override; 52 bool DirectoryExists(BASE_NS::string_view path) const override; 53 54 bool Rename(BASE_NS::string_view fromPath, BASE_NS::string_view toPath) override; 55 56 BASE_NS::vector<BASE_NS::string> GetUriPaths(BASE_NS::string_view uri) const override; 57 58 protected: Destroy()59 void Destroy() override 60 { 61 delete this; 62 } 63 64 private: 65 BASE_NS::unordered_map<BASE_NS::string, BASE_NS::weak_ptr<MemoryFileStorage>> memoryFiles_; 66 }; 67 CORE_END_NAMESPACE() 68 69 #endif // CORE_IO_MEMORY_FILESYSTEM_H 70