patch_manager: Add support for packed updates

Will prefer any installed update over the packed version.

src/core/file_sys/patch_manager.cpp

@@ -184,8 +184,8 @@ static void ApplyLayeredFS(VirtualFile& romfs, u64 title_id, ContentRecordType t
     romfs = std::move(packed);
 }
 
-VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset,
-                                     ContentRecordType type) const {
+VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset, ContentRecordType type,
+                                     VirtualFile update_raw) const {
     LOG_INFO(Loader, "Patching RomFS for title_id={:016X}, type={:02X}", title_id,
              static_cast<u8>(type));
 
@@ -205,6 +205,13 @@ VirtualFile PatchManager::PatchRomFS(VirtualFile romfs, u64 ivfc_offset,
                      FormatTitleVersion(installed->GetEntryVersion(update_tid).get_value_or(0)));
             romfs = new_nca->GetRomFS();
         }
+    } else if (update_raw != 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 (XCI) applied successfully");
+            romfs = new_nca->GetRomFS();
+        }
     }
 
     // LayeredFS
@@ -224,7 +231,7 @@ static bool IsDirValidAndNonEmpty(const VirtualDir& dir) {
     return dir != nullptr && (!dir->GetFiles().empty() || !dir->GetSubdirectories().empty());
 }
 
-std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNames() const {
+std::map<PatchType, std::string> PatchManager::GetPatchVersionNames(VirtualFile update_raw) const {
     std::map<std::string, std::string, std::less<>> out;
     const auto installed = Service::FileSystem::GetUnionContents();
 
@@ -245,6 +252,8 @@ std::map<std::string, std::string, std::less<>> PatchManager::GetPatchVersionNam
                     "Update",
                     FormatTitleVersion(meta_ver.get(), TitleVersionFormat::ThreeElements));
             }
+        } else if (update_raw != nullptr) {
+            out[PatchType::Update] = "XCI";
         }
     }
 

src/core/file_sys/patch_manager.h

@@ -46,7 +46,8 @@ public:
     // - Game Updates
     // - LayeredFS
     VirtualFile PatchRomFS(VirtualFile base, u64 ivfc_offset,
-                           ContentRecordType type = ContentRecordType::Program) const;
+                           ContentRecordType type = ContentRecordType::Program,
+                           VirtualFile update_raw = nullptr) const;
 
     // Returns a vector of pairs between patch names and patch versions.
     // i.e. Update 3.2.2 will return {"Update", "3.2.2"}

src/core/file_sys/romfs_factory.cpp

@@ -24,6 +24,7 @@ RomFSFactory::RomFSFactory(Loader::AppLoader& app_loader) {
         LOG_ERROR(Service_FS, "Unable to read RomFS!");
     }
 
+    app_loader.ReadUpdateRaw(update_raw);
     updatable = app_loader.IsRomFSUpdatable();
     ivfc_offset = app_loader.ReadRomFSIVFCOffset();
 }
@@ -35,7 +36,8 @@ ResultVal<VirtualFile> RomFSFactory::OpenCurrentProcess() {
         return MakeResult<VirtualFile>(file);
 
     const PatchManager patch_manager(Core::CurrentProcess()->GetTitleID());
-    return MakeResult<VirtualFile>(patch_manager.PatchRomFS(file, ivfc_offset));
+    return MakeResult<VirtualFile>(
+        patch_manager.PatchRomFS(file, ivfc_offset, ContentRecordType::Program, update_raw));
 }
 
 ResultVal<VirtualFile> RomFSFactory::Open(u64 title_id, StorageId storage, ContentRecordType type) {

src/core/file_sys/romfs_factory.h

@@ -37,6 +37,7 @@ public:
 
 private:
     VirtualFile file;
+    VirtualFile update_raw;
     bool updatable;
     u64 ivfc_offset;
 };