Initial UserSaveData impl

include/fs/archive_user_save_data.hpp

@@ -0,0 +1,31 @@
+#pragma once
+#include "archive_base.hpp"
+
+class UserSaveDataArchive : public ArchiveBase {
+	u32 archiveID;
+  public:
+	UserSaveDataArchive(Memory& mem, u32 archiveID) : ArchiveBase(mem), archiveID(archiveID) {}
+
+	u64 getFreeBytes() override { return 32_MB; }
+	std::string name() override { return "UserSaveData"; }
+
+	HorizonResult createDirectory(const FSPath& path) override;
+	HorizonResult createFile(const FSPath& path, u64 size) override;
+	HorizonResult deleteFile(const FSPath& path) override;
+
+	Rust::Result<ArchiveBase*, HorizonResult> openArchive(const FSPath& path) override;
+	Rust::Result<DirectorySession, HorizonResult> openDirectory(const FSPath& path) override;
+	FileDescriptor openFile(const FSPath& path, const FilePerms& perms) override;
+	std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) override;
+
+	void format(const FSPath& path, const FormatInfo& info) override;
+	Rust::Result<FormatInfo, HorizonResult> getFormatInfo(const FSPath& path) override;
+
+	std::filesystem::path getFormatInfoPath() { return IOFile::getAppData() / "FormatInfo" / "SaveData.format"; }
+
+	// Returns whether the cart has save data or not
+	bool cartHasSaveData() {
+		auto cxi = mem.getCXI();
+		return (cxi != nullptr && cxi->hasSaveData());  // We need to have a CXI file with more than 0 bytes of save data
+	}
+};