file_sys: Add class to manage game patches

Right now only includes Updates, but should eventually contain all of the other patches we need.
This commit is contained in:
Zach Hilman 2018-08-25 19:03:45 -04:00
parent 54e7ddb93a
commit 8e900a301a
2 changed files with 132 additions and 0 deletions

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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 {
union TitleVersion {
u32 version;
struct {
u8 v_revision;
u8 v_micro;
u8 v_minor;
u8 v_major;
};
};
std::string FormatTitleVersion(u32 version_, bool full) {
TitleVersion ver{};
ver.version = version_;
if (full)
return fmt::format("v{}.{}.{}.{}", ver.v_major, ver.v_minor, ver.v_minor, ver.v_revision);
return fmt::format("v{}.{}.{}", ver.v_major, ver.v_minor, ver.v_micro);
}
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 {
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)
exefs = update->GetExeFS();
}
return exefs;
}
VirtualFile PatchManager::PatchRomFS(VirtualFile romfs) const {
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, ContentRecordType::Program);
if (update != nullptr) {
const auto nca = std::make_shared<NCA>(update, romfs);
if (nca->GetStatus() == Loader::ResultStatus::Success && nca->GetRomFS() != nullptr)
romfs = nca->GetRomFS();
}
return romfs;
}
std::map<PatchType, u32> PatchManager::GetPatchVersionNames() const {
std::map<PatchType, u32> out;
const auto installed = Service::FileSystem::GetUnionContents();
const auto update_tid = GetUpdateTitleID(title_id);
const auto update_version = installed->GetEntryVersion(update_tid);
if (update_version != boost::none &&
installed->HasEntry(update_tid, ContentRecordType::Program))
out[PatchType::Update] = update_version.get();
return out;
}
} // namespace FileSys

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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <map>
#include "common/common_types.h"
#include "core/file_sys/vfs.h"
namespace FileSys {
std::string FormatTitleVersion(u32 version, bool full = false);
enum class PatchType {
Update,
};
std::string FormatPatchTypeName(PatchType type);
// A centralized class to manage patches to games.
class PatchManager {
public:
explicit PatchManager(u64 title_id);
// Currently tracked ExeFS patches:
// - Game Updates
VirtualDir PatchExeFS(VirtualDir exefs) const;
// Currently tracked RomFS patches:
// - Game Updates
VirtualFile PatchRomFS(VirtualFile romfs) const;
// Returns a vector of pairs between patch names and patch versions.
// i.e. Update v80 will return {Update, 80}
std::map<PatchType, u32> GetPatchVersionNames() const;
private:
u64 title_id;
};
} // namespace FileSys