forked from suyu/suyu
114 lines
4.6 KiB
C++
114 lines
4.6 KiB
C++
// Copyright 2018 yuzu emulator team
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <memory>
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/file_sys/disk_filesystem.h"
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#include "core/file_sys/savedata_factory.h"
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#include "core/hle/kernel/process.h"
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namespace FileSys {
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std::string SaveDataDescriptor::DebugInfo() {
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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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}
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SaveDataFactory::SaveDataFactory(std::string nand_directory)
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: nand_directory(std::move(nand_directory)) {}
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ResultVal<std::unique_ptr<FileSystemBackend>> SaveDataFactory::Open(SaveDataSpaceId space,
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SaveDataDescriptor meta) {
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if (meta.type == SaveDataType::SystemSaveData || meta.type == SaveDataType::SaveData) {
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if (meta.zero_1 != 0) {
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LOG_WARNING(Service_FS,
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"Possibly incorrect SaveDataDescriptor, type is "
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"SystemSaveData||SaveData but offset 0x28 is non-zero ({:016X}).",
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meta.zero_1);
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}
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if (meta.zero_2 != 0) {
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LOG_WARNING(Service_FS,
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"Possibly incorrect SaveDataDescriptor, type is "
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"SystemSaveData||SaveData but offset 0x30 is non-zero ({:016X}).",
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meta.zero_2);
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}
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if (meta.zero_3 != 0) {
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LOG_WARNING(Service_FS,
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"Possibly incorrect SaveDataDescriptor, type is "
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"SystemSaveData||SaveData but offset 0x38 is non-zero ({:016X}).",
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meta.zero_3);
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}
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}
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if (meta.type == SaveDataType::SystemSaveData && meta.title_id != 0) {
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LOG_WARNING(Service_FS,
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"Possibly incorrect SaveDataDescriptor, type is SystemSaveData but title_id is "
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"non-zero ({:016X}).",
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meta.title_id);
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}
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std::string save_directory =
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GetFullPath(space, meta.type, meta.title_id, meta.user_id, meta.save_id);
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// TODO(DarkLordZach): Try to not create when opening, there are dedicated create save methods.
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// But, user_ids don't match so this works for now.
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if (!FileUtil::Exists(save_directory)) {
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// TODO(bunnei): This is a work-around to always create a save data directory if it does not
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// already exist. This is a hack, as we do not understand yet how this works on hardware.
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// Without a save data directory, many games will assert on boot. This should not have any
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// bad side-effects.
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FileUtil::CreateFullPath(save_directory);
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}
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// TODO(DarkLordZach): For some reason, CreateFullPath doesn't create the last bit. Should be
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// fixed with VFS.
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if (!FileUtil::IsDirectory(save_directory)) {
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FileUtil::CreateDir(save_directory);
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}
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// Return an error if the save data doesn't actually exist.
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if (!FileUtil::IsDirectory(save_directory)) {
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// TODO(Subv): Find out correct error code.
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return ResultCode(-1);
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}
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auto archive = std::make_unique<Disk_FileSystem>(save_directory);
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return MakeResult<std::unique_ptr<FileSystemBackend>>(std::move(archive));
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}
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std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType type, u64 title_id,
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u128 user_id, u64 save_id) const {
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// According to switchbrew, if a save is of type SaveData and the title id field is 0, it should
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// be interpreted as the title id of the current process.
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if (type == SaveDataType::SaveData && title_id == 0)
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title_id = Core::CurrentProcess()->program_id;
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std::string prefix;
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switch (space) {
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case SaveDataSpaceId::NandSystem:
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prefix = nand_directory + "system/save/";
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break;
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case SaveDataSpaceId::NandUser:
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prefix = nand_directory + "user/save/";
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break;
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default:
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ASSERT_MSG(false, "Unrecognized SaveDataSpaceId: {:02X}", static_cast<u8>(space));
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}
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switch (type) {
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case SaveDataType::SystemSaveData:
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return fmt::format("{}{:016X}/{:016X}{:016X}", prefix, save_id, user_id[1], user_id[0]);
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case SaveDataType::SaveData:
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return fmt::format("{}{:016X}/{:016X}{:016X}/{:016X}", prefix, 0, user_id[1], user_id[0],
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title_id);
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default:
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ASSERT_MSG(false, "Unrecognized SaveDataType: {:02X}", static_cast<u8>(type));
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}
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}
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} // namespace FileSys
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