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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include <cstddef>
#include "common/logging/log.h"
#include "core/file_sys/content_archive.h"
#include "core/file_sys/control_metadata.h"
#include "core/file_sys/patch_manager.h"
#include "core/file_sys/registered_cache.h"
#include "core/file_sys/romfs.h"
#include "core/file_sys/vfs_layered.h"
#include "core/hle/service/filesystem/filesystem.h"
#include "core/loader/loader.h"
namespace FileSys {
constexpr u64 SINGLE_BYTE_MODULUS = 0x100;
std::string FormatTitleVersion(u32 version, TitleVersionFormat format) {
std::array<u8, sizeof(u32)> bytes{};
bytes[0] = version % SINGLE_BYTE_MODULUS;
for (std::size_t i = 1; i < bytes.size(); ++i) {
version /= SINGLE_BYTE_MODULUS;
bytes[i] = 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]);
}
constexpr std::array<const char*, 2> PATCH_TYPE_NAMES{
"Update",
"LayeredFS",
};
std::string FormatPatchTypeName(PatchType type) {
return PATCH_TYPE_NAMES.at(static_cast<std::size_t>(type));
}
PatchManager::PatchManager(u64 title_id) : title_id(title_id) {}
PatchManager::~PatchManager() = default;
VirtualDir PatchManager::PatchExeFS(VirtualDir exefs) const {
LOG_INFO(Loader, "Patching ExeFS for title_id={:016X}", title_id);
if (exefs == nullptr)
return exefs;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed->GetEntry(update_tid, ContentRecordType::Program);
if (update != nullptr) {
if (update->GetStatus() == Loader::ResultStatus::ErrorMissingBKTRBaseRomFS &&
update->GetExeFS() != nullptr) {
LOG_INFO(Loader, " ExeFS: Update ({}) applied successfully",
FormatTitleVersion(installed->GetEntryVersion(update_tid).get_value_or(0)));
exefs = update->GetExeFS();
}
}
return exefs;
}
VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset,
ContentRecordType type) const {
LOG_INFO(Loader, "Patching RomFS for title_id={:016X}, type={:02X}", title_id,
static_cast<u8>(type));
if (romfs == nullptr)
return romfs;
const auto installed = Service::FileSystem::GetUnionContents();
// Game Updates
const auto update_tid = GetUpdateTitleID(title_id);
const auto update = installed->GetEntryRaw(update_tid, type);
if (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(installed->GetEntryVersion(update_tid).get_value_or(0)));
romfs = new_nca->GetRomFS();
}
}
// LayeredFS
const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if (type == ContentRecordType::Program && load_dir != nullptr && load_dir->GetSize() > 0) {
const auto extracted = ExtractRomFS(romfs);
if (extracted != nullptr) {
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<VirtualDir> layers;
layers.reserve(patch_dirs.size() + 1);
for (const auto& subdir : patch_dirs) {
const auto romfs_dir = subdir->GetSubdirectory("romfs");
if (romfs_dir != nullptr)
layers.push_back(romfs_dir);
}
layers.push_back(extracted);
const auto layered = LayerDirectories(layers);
if (layered != nullptr) {
const auto packed = CreateRomFS(layered);
if (packed != nullptr) {
LOG_INFO(Loader, " RomFS: LayeredFS patches applied successfully");
romfs = packed;
}
}
}
}
return romfs;
}
std::map<PatchType, std::string> PatchManager::GetPatchVersionNames() const {
std::map<PatchType, std::string> out;
const auto installed = Service::FileSystem::GetUnionContents();
const auto update_tid = GetUpdateTitleID(title_id);
PatchManager update{update_tid};
auto [nacp, discard_icon_file] = update.GetControlMetadata();
if (nacp != nullptr) {
out[PatchType::Update] = nacp->GetVersionString();
} else {
if (installed->HasEntry(update_tid, ContentRecordType::Program)) {
const auto meta_ver = installed->GetEntryVersion(update_tid);
if (meta_ver == boost::none || meta_ver.get() == 0) {
out[PatchType::Update] = "";
} else {
out[PatchType::Update] =
FormatTitleVersion(meta_ver.get(), TitleVersionFormat::ThreeElements);
}
}
}
const auto lfs_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
if (lfs_dir != nullptr && lfs_dir->GetSize() > 0)
out[PatchType::LayeredFS] = "";
return out;
}
std::pair<std::shared_ptr<NACP>, VirtualFile> PatchManager::GetControlMetadata() const {
const auto& installed{Service::FileSystem::GetUnionContents()};
const auto base_control_nca = installed->GetEntry(title_id, ContentRecordType::Control);
if (base_control_nca == nullptr)
return {};
return ParseControlNCA(base_control_nca);
}
std::pair<std::shared_ptr<NACP>, VirtualFile> PatchManager::ParseControlNCA(
const std::shared_ptr<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");
const auto nacp = nacp_file == nullptr ? nullptr : std::make_shared<NACP>(nacp_file);
VirtualFile icon_file;
for (const auto& language : FileSys::LANGUAGE_NAMES) {
icon_file = extracted->GetFile("icon_" + std::string(language) + ".dat");
if (icon_file != nullptr)
break;
}
return {nacp, icon_file};
}
} // namespace FileSys
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