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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "core/file_sys/patch_manager.h"
#include "core/file_sys/registered_cache.h"
#include "core/hle/service/filesystem/filesystem.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 (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*, 1> PATCH_TYPE_NAMES{
"Update",
};
std::string FormatPatchTypeName(PatchType type) {
return PATCH_TYPE_NAMES.at(static_cast<size_t>(type));
}
PatchManager::PatchManager(u64 title_id) : title_id(title_id) {}
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();
}
}
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);
const auto update_control = installed->GetEntry(title_id, ContentRecordType::Control);
if (update_control != nullptr) {
do {
const auto romfs =
PatchRomFS(update_control->GetRomFS(), update_control->GetBaseIVFCOffset(),
FileSys::ContentRecordType::Control);
if (romfs == nullptr)
break;
const auto control_dir = FileSys::ExtractRomFS(romfs);
if (control_dir == nullptr)
break;
const auto nacp_file = control_dir->GetFile("control.nacp");
if (nacp_file == nullptr)
break;
FileSys::NACP nacp(nacp_file);
out[PatchType::Update] = nacp.GetVersionString();
} while (false);
}
return out;
}
} // namespace FileSys
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