1 files changed, 40 insertions, 0 deletions
diff --git a/src/common/fs/ryujinx_compat.h b/src/common/fs/ryujinx_compat.h
new file mode 100644
index 0000000000..6273754074
--- /dev/null
+++ b/src/common/fs/ryujinx_compat.h
@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include "common/common_types.h"
+#include <filesystem>
+#include <vector>
+
+namespace fs = std::filesystem;
+
+namespace Common::FS {
+
+constexpr const char IMEN_MAGIC[4] = {0x49, 0x4d, 0x45, 0x4e};
+constexpr const char IMKV_MAGIC[4] = {0x49, 0x4d, 0x4b, 0x56};
+constexpr const u8 IMEN_SIZE = 0x8c;
+
+fs::path GetKvdbPath();
+fs::path GetRyuSavePath(const u64 &program_id);
+
+enum class IMENReadResult {
+    Nonexistent,  // ryujinx not found
+    NoHeader,     // file isn't big enough for header
+    InvalidMagic, // no IMKV or IMEN header
+    Misaligned,   // file isn't aligned to expected IMEN boundaries
+    NoImens,      // no-op, there are no IMENs
+    Success,      // :)
+};
+
+struct IMEN
+{
+    u64 title_id;
+    u64 save_id;
+};
+
+static_assert(sizeof(IMEN) == 0x10, "IMEN has incorrect size.");
+
+IMENReadResult ReadKvdb(const fs::path &path, std::vector<IMEN> &imens);
+
+} // namespace Common::FS