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yuzu-mainline/src/core/file_sys/patch_manager.cpp

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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <array>
#include <cstddef>
#include <cstring>
#include "common/hex_util.h"
#include "common/logging/log.h"
#include "common/settings.h"
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#ifndef _WIN32
#include "common/string_util.h"
#endif
#include "core/core.h"
#include "core/file_sys/common_funcs.h"
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#include "core/file_sys/content_archive.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/ips_layer.h"
#include "core/file_sys/patch_manager.h"
#include "core/file_sys/registered_cache.h"
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#include "core/file_sys/romfs.h"
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#include "core/file_sys/vfs_cached.h"
#include "core/file_sys/vfs_layered.h"
#include "core/file_sys/vfs_vector.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/hle/service/ns/language.h"
#include "core/hle/service/set/set.h"
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#include "core/loader/loader.h"
#include "core/loader/nso.h"
#include "core/memory/cheat_engine.h"
namespace FileSys {
namespace {
constexpr u32 SINGLE_BYTE_MODULUS = 0x100;
constexpr std::array<const char*, 14> EXEFS_FILE_NAMES{
"main", "main.npdm", "rtld", "sdk", "subsdk0", "subsdk1", "subsdk2",
"subsdk3", "subsdk4", "subsdk5", "subsdk6", "subsdk7", "subsdk8", "subsdk9",
};
enum class TitleVersionFormat : u8 {
ThreeElements, ///< vX.Y.Z
FourElements, ///< vX.Y.Z.W
};
std::string FormatTitleVersion(u32 version,
TitleVersionFormat format = TitleVersionFormat::ThreeElements) {
std::array<u8, sizeof(u32)> bytes{};
bytes[0] = static_cast<u8>(version % SINGLE_BYTE_MODULUS);
for (std::size_t i = 1; i < bytes.size(); ++i) {
version /= SINGLE_BYTE_MODULUS;
bytes[i] = static_cast<u8>(version % SINGLE_BYTE_MODULUS);
}
if (format == TitleVersionFormat::FourElements) {
return fmt::format("v{}.{}.{}.{}", bytes[3], bytes[2], bytes[1], bytes[0]);
}
return fmt::format("v{}.{}.{}", bytes[3], bytes[2], bytes[1]);
}
// Returns a directory with name matching name case-insensitive. Returns nullptr if directory
// doesn't have a directory with name.
VirtualDir FindSubdirectoryCaseless(const VirtualDir dir, std::string_view name) {
#ifdef _WIN32
return dir->GetSubdirectory(name);
#else
const auto subdirs = dir->GetSubdirectories();
for (const auto& subdir : subdirs) {
std::string dir_name = Common::ToLower(subdir->GetName());
if (dir_name == name) {
return subdir;
}
}
return nullptr;
#endif
}
std::optional<std::vector<Core::Memory::CheatEntry>> ReadCheatFileFromFolder(
u64 title_id, const PatchManager::BuildID& build_id_, const VirtualDir& base_path, bool upper) {
const auto build_id_raw = Common::HexToString(build_id_, upper);
const auto build_id = build_id_raw.substr(0, sizeof(u64) * 2);
const auto file = base_path->GetFile(fmt::format("{}.txt", build_id));
if (file == nullptr) {
LOG_INFO(Common_Filesystem, "No cheats file found for title_id={:016X}, build_id={}",
title_id, build_id);
return std::nullopt;
}
std::vector<u8> data(file->GetSize());
if (file->Read(data.data(), data.size()) != data.size()) {
LOG_INFO(Common_Filesystem, "Failed to read cheats file for title_id={:016X}, build_id={}",
title_id, build_id);
return std::nullopt;
}
const Core::Memory::TextCheatParser parser;
return parser.Parse(std::string_view(reinterpret_cast<const char*>(data.data()), data.size()));
}
void AppendCommaIfNotEmpty(std::string& to, std::string_view with) {
if (to.empty()) {
to += with;
} else {
to += ", ";
to += with;
}
}
bool IsDirValidAndNonEmpty(const VirtualDir& dir) {
return dir != nullptr && (!dir->GetFiles().empty() || !dir->GetSubdirectories().empty());
}
} // Anonymous namespace
PatchManager::PatchManager(u64 title_id_,
const Service::FileSystem::FileSystemController& fs_controller_,
const ContentProvider& content_provider_)
: title_id{title_id_}, fs_controller{fs_controller_}, content_provider{content_provider_} {}
PatchManager::~PatchManager() = default;
u64 PatchManager::GetTitleID() const {
return title_id;
}
VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
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LOG_INFO(Loader, "Patching ExeFS for title_id={:016X}", title_id);
if (exefs == nullptr)
return exefs;
const auto& disabled = Settings::values.disabled_addons[title_id];
const auto update_disabled =
std::find(disabled.cbegin(), disabled.cend(), "Update") != disabled.cend();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = content_provider.GetEntry(update_tid, ContentRecordType::Program);
if (!update_disabled && update != nullptr && update->GetExeFS() != nullptr &&
update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS) {
LOG_INFO(Loader, " ExeFS: Update ({}) applied successfully",
FormatTitleVersion(content_provider.GetEntryVersion(update_tid).value_or(0)));
exefs = update->GetExeFS();
}
// LayeredExeFS
const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
const auto sdmc_load_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
std::vector<VirtualDir> patch_dirs = {sdmc_load_dir};
if (load_dir != nullptr && load_dir->GetSize() > 0) {
const auto load_patch_dirs = load_dir->GetSubdirectories();
patch_dirs.insert(patch_dirs.end(), load_patch_dirs.begin(), load_patch_dirs.end());
}
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<VirtualDir> layers;
layers.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.begin(), disabled.end(), subdir->GetName()) != disabled.end())
continue;
auto exefs_dir = FindSubdirectoryCaseless(subdir, "exefs");
if (exefs_dir != nullptr)
layers.push_back(std::move(exefs_dir));
}
layers.push_back(exefs);
auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
if (layered != nullptr) {
LOG_INFO(Loader, " ExeFS: LayeredExeFS patches applied successfully");
exefs = std::move(layered);
}
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if (Settings::values.dump_exefs) {
LOG_INFO(Loader, "Dumping ExeFS for title_id={:016X}", title_id);
const auto dump_dir = fs_controller.GetModificationDumpRoot(title_id);
if (dump_dir != nullptr) {
const auto exefs_dir = GetOrCreateDirectoryRelative(dump_dir, "/exefs");
VfsRawCopyD(exefs, exefs_dir);
}
}
return exefs;
}
std::vector<VirtualFile> PatchManager::CollectPatches(const std::vector<VirtualDir>& patch_dirs,
const std::string& build_id) const {
const auto& disabled = Settings::values.disabled_addons[title_id];
const auto nso_build_id = fmt::format("{:0<64}", build_id);
std::vector<VirtualFile> out;
out.reserve(patch_dirs.size());
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) != disabled.cend())
continue;
auto exefs_dir = FindSubdirectoryCaseless(subdir, "exefs");
if (exefs_dir != nullptr) {
for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips") {
auto name = file->GetName();
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const auto this_build_id =
fmt::format("{:0<64}", name.substr(0, name.find('.')));
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if (nso_build_id == this_build_id)
out.push_back(file);
} else if (file->GetExtension() == "pchtxt") {
IPSwitchCompiler compiler{file};
if (!compiler.IsValid())
continue;
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const auto this_build_id = Common::HexToString(compiler.GetBuildID());
if (nso_build_id == this_build_id)
out.push_back(file);
}
}
}
}
return out;
}
std::vector<u8> PatchManager::PatchNSO(const std::vector<u8>& nso, const std::string& name) const {
if (nso.size() < sizeof(Loader::NSOHeader)) {
return nso;
}
Loader::NSOHeader header;
std::memcpy(&header, nso.data(), sizeof(header));
if (header.magic != Common::MakeMagic('N', 'S', 'O', '0')) {
return nso;
}
const auto build_id_raw = Common::HexToString(header.build_id);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
if (Settings::values.dump_nso) {
LOG_INFO(Loader, "Dumping NSO for name={}, build_id={}, title_id={:016X}", name, build_id,
title_id);
const auto dump_dir = fs_controller.GetModificationDumpRoot(title_id);
if (dump_dir != nullptr) {
const auto nso_dir = GetOrCreateDirectoryRelative(dump_dir, "/nso");
const auto file = nso_dir->CreateFile(fmt::format("{}-{}.nso", name, build_id));
file->Resize(nso.size());
file->WriteBytes(nso);
}
}
LOG_INFO(Loader, "Patching NSO for name={}, build_id={}", name, build_id);
const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
if (load_dir == nullptr) {
LOG_ERROR(Loader, "Cannot load mods for invalid title_id={:016X}", title_id);
return nso;
}
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
const auto patches = CollectPatches(patch_dirs, build_id);
auto out = nso;
for (const auto& patch_file : patches) {
if (patch_file->GetExtension() == "ips") {
LOG_INFO(Loader, " - Applying IPS patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const auto patched = PatchIPS(std::make_shared<VectorVfsFile>(out), patch_file);
if (patched != nullptr)
out = patched->ReadAllBytes();
} else if (patch_file->GetExtension() == "pchtxt") {
LOG_INFO(Loader, " - Applying IPSwitch patch from mod \"{}\"",
patch_file->GetContainingDirectory()->GetParentDirectory()->GetName());
const IPSwitchCompiler compiler{patch_file};
const auto patched = compiler.Apply(std::make_shared<VectorVfsFile>(out));
if (patched != nullptr)
out = patched->ReadAllBytes();
}
}
if (out.size() < sizeof(Loader::NSOHeader)) {
return nso;
}
std::memcpy(out.data(), &header, sizeof(header));
return out;
}
bool PatchManager::HasNSOPatch(const BuildID& build_id_) const {
const auto build_id_raw = Common::HexToString(build_id_);
const auto build_id = build_id_raw.substr(0, build_id_raw.find_last_not_of('0') + 1);
LOG_INFO(Loader, "Querying NSO patch existence for build_id={}", build_id);
const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
if (load_dir == nullptr) {
LOG_ERROR(Loader, "Cannot load mods for invalid title_id={:016X}", title_id);
return false;
}
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
return !CollectPatches(patch_dirs, build_id).empty();
}
std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(
const BuildID& build_id_) const {
const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
if (load_dir == nullptr) {
LOG_ERROR(Loader, "Cannot load mods for invalid title_id={:016X}", title_id);
return {};
}
const auto& disabled = Settings::values.disabled_addons[title_id];
auto patch_dirs = load_dir->GetSubdirectories();
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<Core::Memory::CheatEntry> out;
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) != disabled.cend()) {
continue;
}
auto cheats_dir = FindSubdirectoryCaseless(subdir, "cheats");
if (cheats_dir != nullptr) {
if (const auto res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, true)) {
std::copy(res->begin(), res->end(), std::back_inserter(out));
continue;
}
if (const auto res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, false)) {
std::copy(res->begin(), res->end(), std::back_inserter(out));
}
}
}
return out;
}
static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType type,
const Service::FileSystem::FileSystemController& fs_controller) {
const auto load_dir = fs_controller.GetModificationLoadRoot(title_id);
const auto sdmc_load_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
if ((type != ContentRecordType::Program && type != ContentRecordType::Data) ||
((load_dir == nullptr || load_dir->GetSize() <= 0) &&
(sdmc_load_dir == nullptr || sdmc_load_dir->GetSize() <= 0))) {
return;
}
auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr) {
return;
}
const auto& disabled = Settings::values.disabled_addons[title_id];
std::vector<VirtualDir> patch_dirs = load_dir->GetSubdirectories();
if (std::find(disabled.cbegin(), disabled.cend(), "SDMC") == disabled.cend()) {
patch_dirs.push_back(sdmc_load_dir);
}
std::sort(patch_dirs.begin(), patch_dirs.end(),
[](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
std::vector<VirtualDir> layers;
std::vector<VirtualDir> layers_ext;
layers.reserve(patch_dirs.size() + 1);
layers_ext.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) != disabled.cend()) {
continue;
}
auto romfs_dir = FindSubdirectoryCaseless(subdir, "romfs");
if (romfs_dir != nullptr)
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layers.push_back(std::make_shared<CachedVfsDirectory>(romfs_dir));
auto ext_dir = FindSubdirectoryCaseless(subdir, "romfs_ext");
if (ext_dir != nullptr)
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layers_ext.push_back(std::make_shared<CachedVfsDirectory>(ext_dir));
}
// When there are no layers to apply, return early as there is no need to rebuild the RomFS
if (layers.empty() && layers_ext.empty()) {
return;
}
layers.push_back(std::move(extracted));
auto layered = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers));
if (layered == nullptr) {
return;
}
auto layered_ext = LayeredVfsDirectory::MakeLayeredDirectory(std::move(layers_ext));
auto packed = CreateRomFS(std::move(layered), std::move(layered_ext));
if (packed == nullptr) {
return;
}
LOG_INFO(Loader, " RomFS: LayeredFS patches applied successfully");
romfs = std::move(packed);
}
VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, ContentRecordType type,
VirtualFile update_raw, bool apply_layeredfs) const {
const auto log_string = fmt::format("Patching RomFS for title_id={:016X}, type={:02X}",
title_id, static_cast<u8>(type));
if (type == ContentRecordType::Program || type == ContentRecordType::Data) {
LOG_INFO(Loader, "{}", log_string);
} else {
LOG_DEBUG(Loader, "{}", log_string);
}
if (romfs == nullptr) {
return romfs;
}
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = content_provider.GetEntryRaw(update_tid, type);
const auto& disabled = Settings::values.disabled_addons[title_id];
const auto update_disabled =
std::find(disabled.cbegin(), disabled.cend(), "Update") != disabled.cend();
if (!update_disabled && update != nullptr) {
const auto new_nca = std::make_shared<NCA>(update, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update ({}) applied successfully",
FormatTitleVersion(content_provider.GetEntryVersion(update_tid).value_or(0)));
romfs = new_nca->GetRomFS();
}
} else if (!update_disabled && update_raw != nullptr) {
const auto new_nca = std::make_shared<NCA>(update_raw, romfs, ivfc_offset);
if (new_nca->GetStatus() == Loader::ResultStatus::Success &&
new_nca->GetRomFS() != nullptr) {
LOG_INFO(Loader, " RomFS: Update (PACKED) applied successfully");
romfs = new_nca->GetRomFS();
}
}
// LayeredFS
if (apply_layeredfs) {
ApplyLayeredFS(romfs, title_id, type, fs_controller);
}
return romfs;
}
PatchManager::PatchVersionNames PatchManager::GetPatchVersionNames(VirtualFile update_raw) const {
if (title_id == 0) {
return {};
}
std::map<std::string, std::string, std::less<>> out;
const auto& disabled = Settings::values.disabled_addons[title_id];
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
PatchManager update{update_tid, fs_controller, content_provider};
const auto metadata = update.GetControlMetadata();
const auto& nacp = metadata.first;
const auto update_disabled =
std::find(disabled.cbegin(), disabled.cend(), "Update") != disabled.cend();
const auto update_label = update_disabled ? "[D] Update" : "Update";
if (nacp != nullptr) {
out.insert_or_assign(update_label, nacp->GetVersionString());
} else {
if (content_provider.HasEntry(update_tid, ContentRecordType::Program)) {
const auto meta_ver = content_provider.GetEntryVersion(update_tid);
if (meta_ver.value_or(0) == 0) {
out.insert_or_assign(update_label, "");
} else {
out.insert_or_assign(update_label, FormatTitleVersion(*meta_ver));
}
} else if (update_raw != nullptr) {
out.insert_or_assign(update_label, "PACKED");
}
}
// General Mods (LayeredFS and IPS)
const auto mod_dir = fs_controller.GetModificationLoadRoot(title_id);
if (mod_dir != nullptr && mod_dir->GetSize() > 0) {
for (const auto& mod : mod_dir->GetSubdirectories()) {
std::string types;
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const auto exefs_dir = FindSubdirectoryCaseless(mod, "exefs");
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if (IsDirValidAndNonEmpty(exefs_dir)) {
bool ips = false;
bool ipswitch = false;
bool layeredfs = false;
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for (const auto& file : exefs_dir->GetFiles()) {
if (file->GetExtension() == "ips") {
ips = true;
} else if (file->GetExtension() == "pchtxt") {
ipswitch = true;
} else if (std::find(EXEFS_FILE_NAMES.begin(), EXEFS_FILE_NAMES.end(),
file->GetName()) != EXEFS_FILE_NAMES.end()) {
layeredfs = true;
}
}
if (ips)
AppendCommaIfNotEmpty(types, "IPS");
if (ipswitch)
AppendCommaIfNotEmpty(types, "IPSwitch");
if (layeredfs)
AppendCommaIfNotEmpty(types, "LayeredExeFS");
}
if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(mod, "romfs")))
AppendCommaIfNotEmpty(types, "LayeredFS");
if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(mod, "cheats")))
AppendCommaIfNotEmpty(types, "Cheats");
if (types.empty())
continue;
const auto mod_disabled =
std::find(disabled.begin(), disabled.end(), mod->GetName()) != disabled.end();
out.insert_or_assign(mod_disabled ? "[D] " + mod->GetName() : mod->GetName(), types);
}
}
// SDMC mod directory (RomFS LayeredFS)
const auto sdmc_mod_dir = fs_controller.GetSDMCModificationLoadRoot(title_id);
if (sdmc_mod_dir != nullptr && sdmc_mod_dir->GetSize() > 0) {
std::string types;
if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(sdmc_mod_dir, "exefs"))) {
AppendCommaIfNotEmpty(types, "LayeredExeFS");
}
if (IsDirValidAndNonEmpty(FindSubdirectoryCaseless(sdmc_mod_dir, "romfs"))) {
AppendCommaIfNotEmpty(types, "LayeredFS");
}
if (!types.empty()) {
const auto mod_disabled =
std::find(disabled.begin(), disabled.end(), "SDMC") != disabled.end();
out.insert_or_assign(mod_disabled ? "[D] SDMC" : "SDMC", types);
}
}
// DLC
const auto dlc_entries =
content_provider.ListEntriesFilter(TitleType::AOC, ContentRecordType::Data);
std::vector<ContentProviderEntry> dlc_match;
dlc_match.reserve(dlc_entries.size());
std::copy_if(dlc_entries.begin(), dlc_entries.end(), std::back_inserter(dlc_match),
[this](const ContentProviderEntry& entry) {
return GetBaseTitleID(entry.title_id) == title_id &&
content_provider.GetEntry(entry)->GetStatus() ==
Loader::ResultStatus::Success;
});
if (!dlc_match.empty()) {
// Ensure sorted so DLC IDs show in order.
std::sort(dlc_match.begin(), dlc_match.end());
std::string list;
for (size_t i = 0; i < dlc_match.size() - 1; ++i)
list += fmt::format("{}, ", dlc_match[i].title_id & 0x7FF);
list += fmt::format("{}", dlc_match.back().title_id & 0x7FF);
const auto dlc_disabled =
std::find(disabled.begin(), disabled.end(), "DLC") != disabled.end();
out.insert_or_assign(dlc_disabled ? "[D] DLC" : "DLC", std::move(list));
}
return out;
}
std::optional<u32> PatchManager::GetGameVersion() const {
const auto update_tid = GetUpdateTitleID(title_id);
if (content_provider.HasEntry(update_tid, ContentRecordType::Program)) {
return content_provider.GetEntryVersion(update_tid);
}
return content_provider.GetEntryVersion(title_id);
}
PatchManager::Metadata PatchManager::GetControlMetadata() const {
const auto base_control_nca = content_provider.GetEntry(title_id, ContentRecordType::Control);
if (base_control_nca == nullptr) {
return {};
}
return ParseControlNCA(*base_control_nca);
}
PatchManager::Metadata PatchManager::ParseControlNCA(const NCA& nca) const {
const auto base_romfs = nca.GetRomFS();
if (base_romfs == nullptr) {
return {};
}
const auto romfs = PatchRomFS(base_romfs, nca.GetBaseIVFCOffset(), ContentRecordType::Control);
if (romfs == nullptr) {
return {};
}
const auto extracted = ExtractRomFS(romfs);
if (extracted == nullptr) {
return {};
}
auto nacp_file = extracted->GetFile("control.nacp");
if (nacp_file == nullptr) {
nacp_file = extracted->GetFile("Control.nacp");
}
auto nacp = nacp_file == nullptr ? nullptr : std::make_unique<NACP>(nacp_file);
// Get language code from settings
const auto language_code =
Service::Set::GetLanguageCodeFromIndex(Settings::values.language_index.GetValue());
// Convert to application language and get priority list
const auto application_language =
Service::NS::ConvertToApplicationLanguage(language_code)
.value_or(Service::NS::ApplicationLanguage::AmericanEnglish);
const auto language_priority_list =
Service::NS::GetApplicationLanguagePriorityList(application_language);
// Convert to language names
auto priority_language_names = FileSys::LANGUAGE_NAMES; // Copy
if (language_priority_list) {
for (size_t i = 0; i < priority_language_names.size(); ++i) {
// Relies on FileSys::LANGUAGE_NAMES being in the same order as
// Service::NS::ApplicationLanguage
const auto language_index = static_cast<u8>(language_priority_list->at(i));
if (language_index < FileSys::LANGUAGE_NAMES.size()) {
priority_language_names[i] = FileSys::LANGUAGE_NAMES[language_index];
} else {
// Not a catastrophe, unlikely to happen
LOG_WARNING(Loader, "Invalid language index {}", language_index);
}
}
}
// Get first matching icon
VirtualFile icon_file;
for (const auto& language : priority_language_names) {
icon_file = extracted->GetFile(std::string("icon_").append(language).append(".dat"));
if (icon_file != nullptr) {
break;
}
}
return {std::move(nacp), icon_file};
}
} // namespace FileSys