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Diffstat (limited to 'src/core/file_sys/disk_archive.h')
-rw-r--r-- | src/core/file_sys/disk_archive.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/core/file_sys/disk_archive.h b/src/core/file_sys/disk_archive.h new file mode 100644 index 000000000..018ebd2ed --- /dev/null +++ b/src/core/file_sys/disk_archive.h @@ -0,0 +1,103 @@ +// Copyright 2014 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include "common/common_types.h" +#include "common/file_util.h" + +#include "core/file_sys/archive_backend.h" +#include "core/loader/loader.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////// +// FileSys namespace + +namespace FileSys { + +/** + * Helper which implements a backend accessing the host machine's filesystem. + * This should be subclassed by concrete archive types, which will provide the + * base directory on the host filesystem and override any required functionality. + */ +class DiskArchive : public ArchiveBackend { +public: + DiskArchive(const std::string& mount_point_) : mount_point(mount_point_) {} + + virtual std::string GetName() const = 0; + std::unique_ptr<FileBackend> OpenFile(const Path& path, const Mode mode) const override; + bool DeleteFile(const Path& path) const override; + bool RenameFile(const Path& src_path, const Path& dest_path) const override; + bool DeleteDirectory(const Path& path) const override; + ResultCode CreateFile(const Path& path, u32 size) const override; + bool CreateDirectory(const Path& path) const override; + bool RenameDirectory(const Path& src_path, const Path& dest_path) const override; + std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const override; + + /** + * Getter for the path used for this Archive + * @return Mount point of that passthrough archive + */ + const std::string& GetMountPoint() const { + return mount_point; + } + +protected: + std::string mount_point; +}; + +class DiskFile : public FileBackend { +public: + DiskFile(); + DiskFile(const DiskArchive* archive, const Path& path, const Mode mode); + + ~DiskFile() override { + Close(); + } + + bool Open() override; + size_t Read(const u64 offset, const u32 length, u8* buffer) const override; + size_t Write(const u64 offset, const u32 length, const u32 flush, const u8* buffer) const override; + size_t GetSize() const override; + bool SetSize(const u64 size) const override; + bool Close() const override; + + void Flush() const override { + file->Flush(); + } + +protected: + const DiskArchive* archive; + std::string path; + Mode mode; + FileUtil::IOFile* file; +}; + +class DiskDirectory : public DirectoryBackend { +public: + DiskDirectory(); + DiskDirectory(const DiskArchive* archive, const Path& path); + + ~DiskDirectory() override { + Close(); + } + + bool Open() override; + u32 Read(const u32 count, Entry* entries) override; + + bool Close() const override { + return true; + } + +protected: + const DiskArchive* archive; + std::string path; + u32 total_entries_in_directory; + FileUtil::FSTEntry directory; + + // We need to remember the last entry we returned, so a subsequent call to Read will continue + // from the next one. This iterator will always point to the next unread entry. + std::vector<FileUtil::FSTEntry>::iterator children_iterator; +}; + +} // namespace FileSys |