// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <memory>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/logging/log.h"
#include "common/uuid.h"
#include "core/core.h"
#include "core/file_sys/savedata_factory.h"
#include "core/file_sys/vfs/vfs.h"
namespace FileSys {
namespace {
bool ShouldSaveDataBeAutomaticallyCreated(SaveDataSpaceId space, const SaveDataAttribute& attr) {
return attr.type == SaveDataType::Cache || attr.type == SaveDataType::Temporary ||
(space == SaveDataSpaceId::User && ///< Normal Save Data -- Current Title & User
(attr.type == SaveDataType::Account || attr.type == SaveDataType::Device) &&
attr.program_id == 0 && attr.system_save_data_id == 0);
}
std::string GetFutureSaveDataPath(SaveDataSpaceId space_id, SaveDataType type, u64 title_id,
u128 user_id) {
// Only detect nand user saves.
const auto space_id_path = [space_id]() -> std::string_view {
switch (space_id) {
case SaveDataSpaceId::User:
return "/user/save";
default:
return "";
}
}();
if (space_id_path.empty()) {
return "";
}
Common::UUID uuid;
std::memcpy(uuid.uuid.data(), user_id.data(), sizeof(Common::UUID));
// Only detect account/device saves from the future location.
switch (type) {
case SaveDataType::Account:
return fmt::format("{}/account/{}/{:016X}/0", space_id_path, uuid.RawString(), title_id);
case SaveDataType::Device:
return fmt::format("{}/device/{:016X}/0", space_id_path, title_id);
default:
return "";
}
}
} // Anonymous namespace
SaveDataFactory::SaveDataFactory(Core::System& system_, ProgramId program_id_,
VirtualDir save_directory_)
: system{system_}, program_id{program_id_}, dir{std::move(save_directory_)} {
// Delete all temporary storages
// On hardware, it is expected that temporary storage be empty at first use.
dir->DeleteSubdirectoryRecursive("temp");
}
SaveDataFactory::~SaveDataFactory() = default;
VirtualDir SaveDataFactory::Create(SaveDataSpaceId space, const SaveDataAttribute& meta) const {
const auto save_directory = GetFullPath(program_id, dir, space, meta.type, meta.program_id,
meta.user_id, meta.system_save_data_id);
return dir->CreateDirectoryRelative(save_directory);
}
VirtualDir SaveDataFactory::Open(SaveDataSpaceId space, const SaveDataAttribute& meta) const {
const auto save_directory = GetFullPath(program_id, dir, space, meta.type, meta.program_id,
meta.user_id, meta.system_save_data_id);
auto out = dir->GetDirectoryRelative(save_directory);
if (out == nullptr && (ShouldSaveDataBeAutomaticallyCreated(space, meta) && auto_create)) {
return Create(space, meta);
}
return out;
}
VirtualDir SaveDataFactory::GetSaveDataSpaceDirectory(SaveDataSpaceId space) const {
return dir->GetDirectoryRelative(GetSaveDataSpaceIdPath(space));
}
std::string SaveDataFactory::GetSaveDataSpaceIdPath(SaveDataSpaceId space) {
switch (space) {
case SaveDataSpaceId::System:
return "/system/";
case SaveDataSpaceId::User:
return "/user/";
case SaveDataSpaceId::Temporary:
return "/temp/";
default:
ASSERT_MSG(false, "Unrecognized SaveDataSpaceId: {:02X}", static_cast<u8>(space));
return "/unrecognized/"; ///< To prevent corruption when ignoring asserts.
}
}
std::string SaveDataFactory::GetFullPath(ProgramId program_id, VirtualDir dir,
SaveDataSpaceId space, SaveDataType type, u64 title_id,
u128 user_id, u64 save_id) {
// According to switchbrew, if a save is of type SaveData and the title id field is 0, it should
// be interpreted as the title id of the current process.
if (type == SaveDataType::Account || type == SaveDataType::Device) {
if (title_id == 0) {
title_id = program_id;
}
}
// For compat with a future impl.
if (std::string future_path =
GetFutureSaveDataPath(space, type, title_id & ~(0xFFULL), user_id);
!future_path.empty()) {
// Check if this location exists, and prefer it over the old.
if (const auto future_dir = dir->GetDirectoryRelative(future_path); future_dir != nullptr) {
LOG_INFO(Service_FS, "Using save at new location: {}", future_path);
return future_path;
}
}
std::string out = GetSaveDataSpaceIdPath(space);
switch (type) {
case SaveDataType::System:
return fmt::format("{}save/{:016X}/{:016X}{:016X}", out, save_id, user_id[1], user_id[0]);
case SaveDataType::Account:
case SaveDataType::Device:
return fmt::format("{}save/{:016X}/{:016X}{:016X}/{:016X}", out, 0, user_id[1], user_id[0],
title_id);
case SaveDataType::Temporary:
return fmt::format("{}{:016X}/{:016X}{:016X}/{:016X}", out, 0, user_id[1], user_id[0],
title_id);
case SaveDataType::Cache:
return fmt::format("{}save/cache/{:016X}", out, title_id);
default:
ASSERT_MSG(false, "Unrecognized SaveDataType: {:02X}", static_cast<u8>(type));
return fmt::format("{}save/unknown_{:X}/{:016X}", out, static_cast<u8>(type), title_id);
}
}
std::string SaveDataFactory::GetUserGameSaveDataRoot(u128 user_id, bool future) {
if (future) {
Common::UUID uuid;
std::memcpy(uuid.uuid.data(), user_id.data(), sizeof(Common::UUID));
return fmt::format("/user/save/account/{}", uuid.RawString());
}
return fmt::format("/user/save/{:016X}/{:016X}{:016X}", 0, user_id[1], user_id[0]);
}
SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
u128 user_id) const {
const auto path =
GetFullPath(program_id, dir, SaveDataSpaceId::User, type, title_id, user_id, 0);
const auto relative_dir = GetOrCreateDirectoryRelative(dir, path);
const auto size_file = relative_dir->GetFile(GetSaveDataSizeFileName());
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 {
const auto path =
GetFullPath(program_id, dir, SaveDataSpaceId::User, type, title_id, user_id, 0);
const auto relative_dir = GetOrCreateDirectoryRelative(dir, path);
const auto size_file = relative_dir->CreateFile(GetSaveDataSizeFileName());
if (size_file == nullptr) {
return;
}
size_file->Resize(sizeof(SaveDataSize));
size_file->WriteObject(new_value);
}
void SaveDataFactory::SetAutoCreate(bool state) {
auto_create = state;
}
} // namespace FileSys