1 files changed, 27 insertions, 10 deletions
diff --git a/src/core/loader/loader.h b/src/core/loader/loader.h
index 885fee84c..843c4bb91 100644
--- a/src/core/loader/loader.h
+++ b/src/core/loader/loader.h
@@ -4,7 +4,6 @@
 
 #pragma once
 
-#include <algorithm>
 #include <iosfwd>
 #include <memory>
 #include <string>
@@ -12,7 +11,6 @@
 #include <vector>
 #include <boost/optional.hpp>
 #include "common/common_types.h"
-#include "common/file_util.h"
 #include "core/file_sys/vfs.h"
 #include "core/hle/kernel/object.h"
 
@@ -31,6 +29,7 @@ enum class FileType {
     NSO,
     NRO,
     NCA,
+    NSP,
     XCI,
     NAX,
     DeconstructedRomDirectory,
@@ -107,6 +106,15 @@ enum class ResultStatus : u16 {
     ErrorMissingAESKeyGenerationSource,
     ErrorMissingSDSaveKeySource,
     ErrorMissingSDNCAKeySource,
+    ErrorNSPMissingProgramNCA,
+    ErrorBadBKTRHeader,
+    ErrorBKTRSubsectionNotAfterRelocation,
+    ErrorBKTRSubsectionNotAtEnd,
+    ErrorBadRelocationBlock,
+    ErrorBadSubsectionBlock,
+    ErrorBadRelocationBuckets,
+    ErrorBadSubsectionBuckets,
+    ErrorMissingBKTRBaseRomFS,
 };
 
 std::ostream& operator<<(std::ostream& os, ResultStatus status);
@@ -114,8 +122,8 @@ std::ostream& operator<<(std::ostream& os, ResultStatus status);
 /// Interface for loading an application
 class AppLoader : NonCopyable {
 public:
-    explicit AppLoader(FileSys::VirtualFile file) : file(std::move(file)) {}
-    virtual ~AppLoader() {}
+    explicit AppLoader(FileSys::VirtualFile file);
+    virtual ~AppLoader();
 
     /**
      * Returns the type of this file
@@ -197,13 +205,22 @@ public:
     }
 
     /**
-     * Get the update RomFS of the application
-     * Since the RomFS can be huge, we return a file reference instead of copying to a buffer
-     * @param file The file containing the RomFS
-     * @return ResultStatus result of function
+     * Get whether or not updates can be applied to the RomFS.
+     * By default, this is true, however for formats where it cannot be guaranteed that the RomFS is
+     * the base game it should be set to false.
+     * @return bool whether or not updatable.
      */
-    virtual ResultStatus ReadUpdateRomFS(FileSys::VirtualFile& file) {
-        return ResultStatus::ErrorNotImplemented;
+    virtual bool IsRomFSUpdatable() const {
+        return true;
+    }
+
+    /**
+     * Gets the difference between the start of the IVFC header and the start of level 6 (RomFS)
+     * data. Needed for bktr patching.
+     * @return IVFC offset for romfs.
+     */
+    virtual u64 ReadRomFSIVFCOffset() const {
+        return 0;
     }
 
     /**