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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.
This commit is contained in:
Zach Hilman 2018-12-06 20:28:51 -05:00
parent 0756f29a2c
commit 4082c4eda6
2 changed files with 38 additions and 0 deletions
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30
src/core/file_sys/savedata_factory.cpp
View File

@ -13,6 +13,8 @@
namespace FileSys {
constexpr const char* SAVE_DATA_SIZE_FILENAME = ".yuzu_save_size";
std::string SaveDataDescriptor::DebugInfo() const {
return fmt::format("[type={:02X}, title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}]",
static_cast<u8>(type), title_id, user_id[1], user_id[0], save_id);
@ -132,4 +134,32 @@ std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType typ
}
}
SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
u128 user_id) const {
const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
const auto size_file = dir->GetFile(SAVE_DATA_SIZE_FILENAME);
if (size_file == nullptr || size_file->GetSize() < sizeof(SaveDataSize))
return {0, 0};
SaveDataSize out;
if (size_file->ReadObject(&out) != sizeof(SaveDataSize))
return {0, 0};
return out;
}
void SaveDataFactory::WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id,
SaveDataSize new_value) {
const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
const auto size_file = dir->CreateFile(SAVE_DATA_SIZE_FILENAME);
if (size_file == nullptr)
return;
size_file->Resize(sizeof(SaveDataSize));
size_file->WriteObject(new_value);
}
} // namespace FileSys

8
src/core/file_sys/savedata_factory.h
View File

@ -46,6 +46,11 @@ struct SaveDataDescriptor {
};
static_assert(sizeof(SaveDataDescriptor) == 0x40, "SaveDataDescriptor has incorrect size.");
struct SaveDataSize {
u64 normal;
u64 journal;
};
/// File system interface to the SaveData archive
class SaveDataFactory {
public:
@ -60,6 +65,9 @@ public:
static std::string GetFullPath(SaveDataSpaceId space, SaveDataType type, u64 title_id,
u128 user_id, u64 save_id);
SaveDataSize ReadSaveDataSize(SaveDataType type, u64 title_id, u128 user_id) const;
void WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id, SaveDataSize new_value);
private:
VirtualDir dir;
};