100 lines
3 KiB
C++
100 lines
3 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 <cstddef>
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#include <memory>
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#include <string>
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#include <vector>
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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/file_sys/directory_backend.h"
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#include "core/file_sys/file_backend.h"
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#include "core/hle/result.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 override { return "DiskArchive: " + mount_point; }
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ResultVal<std::unique_ptr<FileBackend>> OpenFile(const Path& path, const Mode mode) const override;
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ResultCode 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, u64 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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u64 GetFreeBytes() const override;
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protected:
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friend class DiskFile;
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friend class DiskDirectory;
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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(const DiskArchive& archive, const Path& path, const Mode mode);
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ResultCode Open() override;
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ResultVal<size_t> Read(u64 offset, size_t length, u8* buffer) const override;
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ResultVal<size_t> Write(u64 offset, size_t length, bool flush, const u8* buffer) const override;
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u64 GetSize() const override;
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bool SetSize(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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std::string path;
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Mode mode;
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std::unique_ptr<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(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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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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