104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "common/common_types.h"
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#include "common/file_util.h"
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#include "core/file_sys/archive_backend.h"
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#include "core/loader/loader.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// FileSys namespace
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namespace FileSys {
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/**
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* Helper which implements a backend accessing the host machine's filesystem.
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* This should be subclassed by concrete archive types, which will provide the
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* base directory on the host filesystem and override any required functionality.
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*/
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class DiskArchive : public ArchiveBackend {
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public:
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DiskArchive(const std::string& mount_point_) : mount_point(mount_point_) {}
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virtual std::string GetName() const = 0;
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std::unique_ptr<FileBackend> OpenFile(const Path& path, const Mode mode) const override;
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bool DeleteFile(const Path& path) const override;
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bool RenameFile(const Path& src_path, const Path& dest_path) const override;
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bool DeleteDirectory(const Path& path) const override;
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ResultCode CreateFile(const Path& path, u32 size) const override;
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bool CreateDirectory(const Path& path) const override;
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bool RenameDirectory(const Path& src_path, const Path& dest_path) const override;
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std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override;
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/**
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* Getter for the path used for this Archive
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* @return Mount point of that passthrough archive
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*/
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const std::string& GetMountPoint() const {
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return mount_point;
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}
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protected:
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std::string mount_point;
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};
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class DiskFile : public FileBackend {
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public:
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DiskFile();
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DiskFile(const DiskArchive* archive, const Path& path, const Mode mode);
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~DiskFile() override {
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Close();
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}
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bool Open() override;
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size_t Read(const u64 offset, const u32 length, u8* buffer) const override;
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size_t Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const override;
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size_t GetSize() const override;
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bool SetSize(const u64 size) const override;
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bool Close() const override;
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void Flush() const override {
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file->Flush();
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}
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protected:
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const DiskArchive* archive;
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std::string path;
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Mode mode;
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FileUtil::IOFile* file;
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};
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class DiskDirectory : public DirectoryBackend {
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public:
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DiskDirectory();
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DiskDirectory(const DiskArchive* archive, const Path& path);
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~DiskDirectory() override {
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Close();
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}
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bool Open() override;
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u32 Read(const u32 count, Entry* entries) override;
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bool Close() const override {
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return true;
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}
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protected:
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const DiskArchive* archive;
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std::string path;
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u32 total_entries_in_directory;
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FileUtil::FSTEntry directory;
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// We need to remember the last entry we returned, so a subsequent call to Read will continue
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// from the next one. This iterator will always point to the next unread entry.
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std::vector<FileUtil::FSTEntry>::iterator children_iterator;
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};
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} // namespace FileSys
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