summaryrefslogblamecommitdiffstats
path: root/src/core/file_sys/archive_backend.h
blob: 601e95d8c93e24c8e927a0ebf451dac93b889cee (plain) (tree)
1
2
3
4
5
6
7
8
9
10
                                        
                                            



                                          
                 


                  
 
                             

                                
                            
 


                   


                       








                        






                                    

            



                                                                                       
 
                                                
 



                                                               
                                 
 


                                     







                           
                                    
       

                               

       
                                                                              
       
                                            

       




                                                                  
                                                                                               

       



                                                
                                                        

       




                                                                
                                                                                   

       



                                                     
                                                             

       







                                                                        



                                                     
                                                             

       




                                                                
                                                                                        

       



                                               
                                                                                        





                                                      

  
























                                                                                  
                      
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <memory>
#include <string>
#include <utility>
#include <vector>

#include "common/bit_field.h"
#include "common/common_types.h"

#include "core/hle/result.h"


namespace FileSys {

class FileBackend;
class DirectoryBackend;

// Path string type
enum LowPathType : u32 {
    Invalid = 0,
    Empty   = 1,
    Binary  = 2,
    Char    = 3,
    Wchar   = 4
};

union Mode {
    u32 hex;
    BitField<0, 1, u32> read_flag;
    BitField<1, 1, u32> write_flag;
    BitField<2, 1, u32> create_flag;
};

class Path {
public:
    Path() : type(Invalid) {}
    Path(const char* path) : type(Char), string(path) {}
    Path(std::vector<u8> binary_data) : type(Binary), binary(std::move(binary_data)) {}
    Path(LowPathType type, u32 size, u32 pointer);

    LowPathType GetType() const { return type; }

    /**
     * Gets the string representation of the path for debugging
     * @return String representation of the path for debugging
     */
    std::string DebugStr() const;

    std::string AsString() const;
    std::u16string AsU16Str() const;
    std::vector<u8> AsBinary() const;

private:
    LowPathType type;
    std::vector<u8> binary;
    std::string string;
    std::u16string u16str;
};

class ArchiveBackend : NonCopyable {
public:
    virtual ~ArchiveBackend() {
    }

    /**
     * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.)
     */
    virtual std::string GetName() const = 0;

    /**
     * Open a file specified by its path, using the specified mode
     * @param path Path relative to the archive
     * @param mode Mode to open the file with
     * @return Opened file, or nullptr
     */
    virtual std::unique_ptr<FileBackend> OpenFile(const Path& path, const Mode mode) const = 0;

    /**
     * Delete a file specified by its path
     * @param path Path relative to the archive
     * @return Whether the file could be deleted
     */
    virtual bool DeleteFile(const Path& path) const = 0;

    /**
     * Rename a File specified by its path
     * @param src_path Source path relative to the archive
     * @param dest_path Destination path relative to the archive
     * @return Whether rename succeeded
     */
    virtual bool RenameFile(const Path& src_path, const Path& dest_path) const = 0;

    /**
     * Delete a directory specified by its path
     * @param path Path relative to the archive
     * @return Whether the directory could be deleted
     */
    virtual bool DeleteDirectory(const Path& path) const = 0;

    /**
     * Create a file specified by its path
     * @param path Path relative to the Archive
     * @param size The size of the new file, filled with zeroes
     * @return File creation result code
     */
    virtual ResultCode CreateFile(const Path& path, u32 size) const = 0;

    /**
     * Create a directory specified by its path
     * @param path Path relative to the archive
     * @return Whether the directory could be created
     */
    virtual bool CreateDirectory(const Path& path) const = 0;

    /**
     * Rename a Directory specified by its path
     * @param src_path Source path relative to the archive
     * @param dest_path Destination path relative to the archive
     * @return Whether rename succeeded
     */
    virtual bool RenameDirectory(const Path& src_path, const Path& dest_path) const = 0;

    /**
     * Open a directory specified by its path
     * @param path Path relative to the archive
     * @return Opened directory, or nullptr
     */
    virtual std::unique_ptr<DirectoryBackend> OpenDirectory(const Path& path) const = 0;

    /**
     * Get the free space
     * @return The number of free bytes in the archive
     */
    virtual u64 GetFreeBytes() const = 0;
};

class ArchiveFactory : NonCopyable {
public:
    virtual ~ArchiveFactory() {
    }

    /**
     * Get a descriptive name for the archive (e.g. "RomFS", "SaveData", etc.)
     */
    virtual std::string GetName() const = 0;

    /**
     * Tries to open the archive of this type with the specified path
     * @param path Path to the archive
     * @return An ArchiveBackend corresponding operating specified archive path.
     */
    virtual ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) = 0;

    /**
     * Deletes the archive contents and then re-creates the base folder
     * @param path Path to the archive
     * @return ResultCode of the operation, 0 on success
     */
    virtual ResultCode Format(const Path& path) = 0;
};

} // namespace FileSys