savedata_factory: Partially implement IVFC save sizes using files
This stores a file in the save directory called '.yuzu_save_size' which stores the two save sizes (normal area and journaled area) sequentially as u64s.
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@ -13,6 +13,8 @@
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namespace FileSys {
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constexpr const char* SAVE_DATA_SIZE_FILENAME = ".yuzu_save_size";
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std::string SaveDataDescriptor::DebugInfo() const {
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return fmt::format("[type={:02X}, title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}]",
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static_cast<u8>(type), title_id, user_id[1], user_id[0], save_id);
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@ -132,4 +134,32 @@ std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType typ
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}
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}
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SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
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u128 user_id) const {
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const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
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const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
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const auto size_file = dir->GetFile(SAVE_DATA_SIZE_FILENAME);
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if (size_file == nullptr || size_file->GetSize() < sizeof(SaveDataSize))
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return {0, 0};
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SaveDataSize out;
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if (size_file->ReadObject(&out) != sizeof(SaveDataSize))
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return {0, 0};
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return out;
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}
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void SaveDataFactory::WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id,
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SaveDataSize new_value) {
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const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
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const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
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const auto size_file = dir->CreateFile(SAVE_DATA_SIZE_FILENAME);
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if (size_file == nullptr)
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return;
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size_file->Resize(sizeof(SaveDataSize));
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size_file->WriteObject(new_value);
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}
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} // namespace FileSys
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@ -46,6 +46,11 @@ struct SaveDataDescriptor {
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};
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static_assert(sizeof(SaveDataDescriptor) == 0x40, "SaveDataDescriptor has incorrect size.");
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struct SaveDataSize {
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u64 normal;
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u64 journal;
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};
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/// File system interface to the SaveData archive
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class SaveDataFactory {
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public:
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@ -60,6 +65,9 @@ public:
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static std::string GetFullPath(SaveDataSpaceId space, SaveDataType type, u64 title_id,
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u128 user_id, u64 save_id);
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SaveDataSize ReadSaveDataSize(SaveDataType type, u64 title_id, u128 user_id) const;
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void WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id, SaveDataSize new_value);
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private:
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VirtualDir dir;
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};
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