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/*
Copyright 2016-2023 melonDS team
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#ifndef FATSTORAGE_H
#define FATSTORAGE_H
#include <stdio.h>
#include <string>
#include <map>
#include <optional>
#include <filesystem>
#include "Platform.h"
#include "types.h"
#include "fatfs/ff.h"
namespace melonDS
{
/// Contains information necessary to load an SD card image.
/// The intended use case is for loading homebrew NDS ROMs;
/// you won't know that a ROM is homebrew until you parse it,
/// so if you load the SD card before the ROM
/// then you might end up discarding it.
struct FATStorageArgs
{
std::string Filename;
u64 Size;
bool ReadOnly;
std::optional<std::string> SourceDir;
};
class FATStorage
{
public:
FATStorage(const std::string& filename, u64 size, bool readonly, const std::optional<std::string>& sourcedir = std::nullopt);
FATStorage(const FATStorageArgs& args) noexcept;
FATStorage(FATStorageArgs&& args) noexcept;
FATStorage(FATStorage&& other) noexcept;
FATStorage(const FATStorage& other) = delete;
FATStorage& operator=(const FATStorage& other) = delete;
FATStorage& operator=(FATStorage&& other) noexcept;
~FATStorage();
bool InjectFile(const std::string& path, u8* data, u32 len);
u32 ReadSectors(u32 start, u32 num, u8* data) const;
u32 WriteSectors(u32 start, u32 num, const u8* data);
[[nodiscard]] bool IsReadOnly() const noexcept { return ReadOnly; }
private:
std::string FilePath;
std::string IndexPath;
std::optional<std::string> SourceDir;
bool ReadOnly;
Platform::FileHandle* File;
u64 FileSize;
static Platform::FileHandle* FF_File;
static u64 FF_FileSize;
static UINT FF_ReadStorage(BYTE* buf, LBA_t sector, UINT num);
static UINT FF_WriteStorage(const BYTE* buf, LBA_t sector, UINT num);
static u32 ReadSectorsInternal(Platform::FileHandle* file, u64 filelen, u32 start, u32 num, u8* data);
static u32 WriteSectorsInternal(Platform::FileHandle* file, u64 filelen, u32 start, u32 num, const u8* data);
void LoadIndex();
void SaveIndex();
bool ExportFile(const std::string& path, std::filesystem::path out);
void ExportDirectory(const std::string& path, const std::string& outbase, int level);
bool DeleteHostDirectory(const std::string& path, const std::string& outbase, int level);
void ExportChanges(const std::string& outbase);
bool CanFitFile(u32 len);
bool DeleteDirectory(const std::string& path, int level);
void CleanupDirectory(const std::string& sourcedir, const std::string& path, int level);
bool ImportFile(const std::string& path, std::filesystem::path in);
bool ImportDirectory(const std::string& sourcedir);
u64 GetDirectorySize(std::filesystem::path sourcedir) const;
bool Load(const std::string& filename, u64 size, const std::optional<std::string>& sourcedir);
bool Save();
typedef struct
{
std::string Path;
bool IsReadOnly;
} DirIndexEntry;
typedef struct
{
std::string Path;
bool IsReadOnly;
u64 Size;
s64 LastModified;
u32 LastModifiedInternal;
} FileIndexEntry;
std::map<std::string, DirIndexEntry> DirIndex;
std::map<std::string, FileIndexEntry> FileIndex;
};
}
#endif // FATSTORAGE_H
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