1 files changed, 62 insertions, 0 deletions

diff --git a/src/core/file_sys/patch_manager.h b/src/core/file_sys/patch_manager.h
new file mode 100644
index 000000000..28c7ae136
--- /dev/null
+++ b/src/core/file_sys/patch_manager.h
@@ -0,0 +1,62 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <map>
+#include <string>
+#include "common/common_types.h"
+#include "core/file_sys/nca_metadata.h"
+#include "core/file_sys/vfs.h"
+
+namespace FileSys {
+
+class NCA;
+class NACP;
+
+enum class TitleVersionFormat : u8 {
+    ThreeElements, ///< vX.Y.Z
+    FourElements,  ///< vX.Y.Z.W
+};
+
+std::string FormatTitleVersion(u32 version,
+                               TitleVersionFormat format = TitleVersionFormat::ThreeElements);
+
+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 base, u64 ivfc_offset,
+                           ContentRecordType type = ContentRecordType::Program) const;
+
+    // Returns a vector of pairs between patch names and patch versions.
+    // i.e. Update v80 will return {Update, 80}
+    std::map<PatchType, std::string> GetPatchVersionNames() const;
+
+    // Given title_id of the program, attempts to get the control data of the update and parse it,
+    // falling back to the base control data.
+    std::pair<std::shared_ptr<NACP>, VirtualFile> GetControlMetadata() const;
+
+    // Version of GetControlMetadata that takes an arbitrary NCA
+    std::pair<std::shared_ptr<NACP>, VirtualFile> ParseControlNCA(
+        const std::shared_ptr<NCA>& nca) const;
+
+private:
+    u64 title_id;
+};
+
+} // namespace FileSys