1 files changed, 101 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 00000000..778c8395
--- /dev/null
+++ b/src/core/file_sys/disk_archive.h
@@ -0,0 +1,101 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.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 FileSys::Path& path) const override;
+    bool RenameFile(const FileSys::Path& src_path, const FileSys::Path& dest_path) const override;
+    bool DeleteDirectory(const FileSys::Path& path) const override;
+    bool CreateDirectory(const Path& path) const override;
+    bool RenameDirectory(const FileSys::Path& src_path, const FileSys::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