// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/hex_util.h"
#include "core/file_sys/savedata_factory.h"
#include "core/hle/service/cmif_serialization.h"
#include "core/hle/service/filesystem/fsp/fs_i_save_data_info_reader.h"
#include "core/hle/service/filesystem/save_data_controller.h"
namespace Service::FileSystem {
ISaveDataInfoReader::ISaveDataInfoReader(Core::System& system_,
std::shared_ptr<SaveDataController> save_data_controller_,
FileSys::SaveDataSpaceId space)
: ServiceFramework{system_, "ISaveDataInfoReader"}, save_data_controller{
save_data_controller_} {
static const FunctionInfo functions[] = {
{0, D<&ISaveDataInfoReader::ReadSaveDataInfo>, "ReadSaveDataInfo"},
};
RegisterHandlers(functions);
FindAllSaves(space);
}
ISaveDataInfoReader::~ISaveDataInfoReader() = default;
static u64 stoull_be(std::string_view str) {
if (str.size() != 16) {
return 0;
}
const auto bytes = Common::HexStringToArray<0x8>(str);
u64 out{};
std::memcpy(&out, bytes.data(), sizeof(u64));
return Common::swap64(out);
}
Result ISaveDataInfoReader::ReadSaveDataInfo(
Out<u64> out_count, OutArray<SaveDataInfo, BufferAttr_HipcMapAlias> out_entries) {
LOG_DEBUG(Service_FS, "called");
// Calculate how many entries we can fit in the output buffer
const u64 count_entries = out_entries.size();
// Cap at total number of entries.
const u64 actual_entries = std::min(count_entries, info.size() - next_entry_index);
// Determine data start and end
const auto* begin = reinterpret_cast<u8*>(info.data() + next_entry_index);
const auto* end = reinterpret_cast<u8*>(info.data() + next_entry_index + actual_entries);
const auto range_size = static_cast<std::size_t>(std::distance(begin, end));
next_entry_index += actual_entries;
// Write the data to memory
std::memcpy(out_entries.data(), begin, range_size);
*out_count = actual_entries;
R_SUCCEED();
}
void ISaveDataInfoReader::FindAllSaves(FileSys::SaveDataSpaceId space) {
FileSys::VirtualDir save_root{};
const auto result = save_data_controller->OpenSaveDataSpace(&save_root, space);
if (result != ResultSuccess || save_root == nullptr) {
LOG_ERROR(Service_FS, "The save root for the space_id={:02X} was invalid!", space);
return;
}
for (const auto& type : save_root->GetSubdirectories()) {
if (type->GetName() == "save") {
FindNormalSaves(space, type);
} else if (space == FileSys::SaveDataSpaceId::Temporary) {
FindTemporaryStorageSaves(space, type);
}
}
}
void ISaveDataInfoReader::FindNormalSaves(FileSys::SaveDataSpaceId space,
const FileSys::VirtualDir& type) {
for (const auto& save_id : type->GetSubdirectories()) {
for (const auto& user_id : save_id->GetSubdirectories()) {
// Skip non user id subdirectories
if (user_id->GetName().size() != 0x20) {
continue;
}
const auto save_id_numeric = stoull_be(save_id->GetName());
auto user_id_numeric = Common::HexStringToArray<0x10>(user_id->GetName());
std::reverse(user_id_numeric.begin(), user_id_numeric.end());
if (save_id_numeric != 0) {
// System Save Data
info.emplace_back(SaveDataInfo{
0,
space,
FileSys::SaveDataType::System,
{},
user_id_numeric,
save_id_numeric,
0,
user_id->GetSize(),
{},
{},
});
continue;
}
for (const auto& title_id : user_id->GetSubdirectories()) {
const auto device = std::all_of(user_id_numeric.begin(), user_id_numeric.end(),
[](u8 val) { return val == 0; });
info.emplace_back(SaveDataInfo{
0,
space,
device ? FileSys::SaveDataType::Device : FileSys::SaveDataType::Account,
{},
user_id_numeric,
save_id_numeric,
stoull_be(title_id->GetName()),
title_id->GetSize(),
{},
{},
});
}
}
}
}
void ISaveDataInfoReader::FindTemporaryStorageSaves(FileSys::SaveDataSpaceId space,
const FileSys::VirtualDir& type) {
for (const auto& user_id : type->GetSubdirectories()) {
// Skip non user id subdirectories
if (user_id->GetName().size() != 0x20) {
continue;
}
for (const auto& title_id : user_id->GetSubdirectories()) {
if (!title_id->GetFiles().empty() || !title_id->GetSubdirectories().empty()) {
auto user_id_numeric = Common::HexStringToArray<0x10>(user_id->GetName());
std::reverse(user_id_numeric.begin(), user_id_numeric.end());
info.emplace_back(SaveDataInfo{
0,
space,
FileSys::SaveDataType::Temporary,
{},
user_id_numeric,
stoull_be(type->GetName()),
stoull_be(title_id->GetName()),
title_id->GetSize(),
{},
{},
});
}
}
}
}
} // namespace Service::FileSystem