127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
/*
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Copyright 2016-2024 melonDS team
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#ifndef FATSTORAGE_H
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#define FATSTORAGE_H
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#include <stdio.h>
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#include <string>
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#include <map>
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#include <optional>
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#include <filesystem>
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#include "Platform.h"
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#include "types.h"
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#include "fatfs/ff.h"
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#include "FATIO.h"
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namespace melonDS
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{
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/// Contains information necessary to load an SD card image.
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/// The intended use case is for loading homebrew NDS ROMs;
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/// you won't know that a ROM is homebrew until you parse it,
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/// so if you load the SD card before the ROM
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/// then you might end up discarding it.
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struct FATStorageArgs
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{
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std::string Filename;
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/// Size of the desired SD card in bytes, or 0 for auto-detect.
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u64 Size;
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bool ReadOnly;
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std::optional<std::string> SourceDir;
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};
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class FATStorage
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{
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public:
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FATStorage(const std::string& filename, u64 size, bool readonly, const std::optional<std::string>& sourcedir = std::nullopt);
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explicit FATStorage(const FATStorageArgs& args) noexcept;
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explicit FATStorage(FATStorageArgs&& args) noexcept;
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FATStorage(FATStorage&& other) noexcept;
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FATStorage(const FATStorage& other) = delete;
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FATStorage& operator=(const FATStorage& other) = delete;
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FATStorage& operator=(FATStorage&& other) noexcept;
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~FATStorage();
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bool InjectFile(const std::string& path, u8* data, u32 len);
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u32 ReadFile(const std::string& path, u32 start, u32 len, u8* data);
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u32 ReadSectors(u32 start, u32 num, u8* data) const;
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u32 WriteSectors(u32 start, u32 num, const u8* data);
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[[nodiscard]] bool IsReadOnly() const noexcept { return ReadOnly; }
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u64 GetSectorCount() const;
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private:
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std::string FilePath;
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std::string IndexPath;
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std::optional<std::string> SourceDir;
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bool ReadOnly;
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Platform::FileHandle* File;
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u64 FileSize;
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[[nodiscard]] ff_disk_read_cb FF_ReadStorage() const noexcept;
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[[nodiscard]] ff_disk_write_cb FF_WriteStorage() const noexcept;
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static u32 ReadSectorsInternal(Platform::FileHandle* file, u64 filelen, u32 start, u32 num, u8* data);
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static u32 WriteSectorsInternal(Platform::FileHandle* file, u64 filelen, u32 start, u32 num, const u8* data);
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void LoadIndex();
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void SaveIndex();
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bool ExportFile(const std::string& path, std::filesystem::path out);
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void ExportDirectory(const std::string& path, const std::string& outbase, int level);
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bool DeleteHostDirectory(const std::string& path, const std::string& outbase, int level);
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void ExportChanges(const std::string& outbase);
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bool CanFitFile(u32 len);
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bool DeleteDirectory(const std::string& path, int level);
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void CleanupDirectory(const std::string& sourcedir, const std::string& path, int level);
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bool ImportFile(const std::string& path, std::filesystem::path in);
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bool ImportDirectory(const std::string& sourcedir);
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u64 GetDirectorySize(std::filesystem::path sourcedir) const;
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bool Load(const std::string& filename, u64 size, const std::optional<std::string>& sourcedir);
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bool Save();
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typedef struct
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{
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std::string Path;
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bool IsReadOnly;
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} DirIndexEntry;
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typedef struct
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{
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std::string Path;
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bool IsReadOnly;
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u64 Size;
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s64 LastModified;
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u32 LastModifiedInternal;
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} FileIndexEntry;
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std::map<std::string, DirIndexEntry> DirIndex;
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std::map<std::string, FileIndexEntry> FileIndex;
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};
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}
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#endif // FATSTORAGE_H
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